Document:

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                                                                   Exhibit 10.33

                                   AGREEMENT
                   FOR LOCAL WIRELINE NETWORK INTERCONNECTION
                                      AND
                                 SERVICE RESALE
                                    Between
                            Pac-West Telecomm, Inc.
                                      and
                         U S WEST Communications, Inc.

                                For the State of
                                    Arizona

                                Agreement Number
                                CDS-990507-0126

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                               TABLE OF CONTENTS
                                     PART A

RECITALS .................................................................. 1

SCOPE OF AGREEMENT ........................................................ 1

DEFINITIONS ............................................................... 2

TERMS AND CONDITIONS ...................................................... 12

 1. General Provisions .................................................... 12
 2. Most Favored Nation Terms and Treatment ............................... 13
 3. Payment ............................................................... 13
 4. Taxes ................................................................. 14
 5. Intellectual Property ................................................. 14
 6. Severability .......................................................... 15
 7. Responsibility for Environmental Contamination ........................ 15
 8. Branding .............................................................. 16
 9. Independent Contractor Status ......................................... 17
 10. Referenced Documents ................................................. 18
 11. Publicity and Advertising ............................................ 18
 12. Executed in Counterparts ............................................. 18
 13. Headings Not Controlling ............................................. 18
 14. Joint Work Product ................................................... 18
 15. Survival ............................................................. 18
 16. Effective Date ....................................................... 19
 17. Amendment of Agreement ............................................... 19
 18. Indemnification ...................................................... 19
 19. Limitation of Liability .............................................. 20
 20. Term of Agreement .................................................... 21
 21. Governing Law ........................................................ 21
 22. Cancellation Charges ................................................. 21
 23. Regulatory Approvals ................................................. 21
 24. Compliance ........................................................... 22
 25. Force Majeure ........................................................ 22
 26. Escalation Procedures ................................................ 23
 27. Dispute Resolution ................................................... 23
 28. Nondisclosure ........................................................ 24
 29. Notices .............................................................. 26
 30. Assignment ........................................................... 26
 31. Warranties ........................................................... 27
 32. Default .............................................................. 27
 33. Remedies ............................................................. 28
 34. Waivers .............................................................. 28
 35. No Third Party Beneficiaries ......................................... 28
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                                                                        PART A

 36. Physical Security ................................................... 29
 37. Network Security .................................................... 29
 38. Revenue Protection .................................................. 30
 39. Law Enforcement Interface ........................................... 30
 40. Collocation ......................................................... 30
 41. Technical References - Collocation .................................. 41
 42. Number Portability .................................................. 41
 43. Dialing Parity ...................................................... 48
 44. Directory Listings .................................................. 49
 45. [intentionally left blank for numbering consistency] ................ 52
 46. U S WEST Dex Issues ................................................. 52
 47. Access to Poles, Ducts, Conduits, and Rights of Way ................. 52
 48. Bona Fide Request Process for Further Unbundling .................... 57
 49. Audit Process ....................................................... 59
 50. Miscellaneous Services .............................................. 61
 51. Unused Transmission Media ........................................... 76
 52. Service Standards ................................................... 78
 53. Entire Agreement .................................................... 80
 54.Reservation  of Rights ............................................... 81

ATTACHMENTS

 Attachment 1                Rates and Charges
 Attachment 2                Resale
 Attachment 3                Unbundled Access/Elements
 Attachment 4                Interconnection
 Attachment 5                Business Process Requirements
 Attachment 6                Electronic Interfaces
 Attachment 7                Implementation Schedule

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        This Interconnection Agreement (this 'Agreement"), effective upon
Commission approval (the "Effective Date"), is entered into by and between
Pac-West Telecomm, Inc. ("Pac-West"), a California and U S WEST Communications,
Inc., ("US WEST") a California corporation, to establish the rates, terms and
conditions for local interconnection, local resale, and the purchase of
unbundled network elements (individually referred to as the "service" or
collectively as the "services").

                                    RECITALS

        WHEREAS, pursuant to this Agreement, Pac-West and U S WEST will extend
certain arrangements to one another within each LATA in which they both operate
within Arizona. This Agreement is a combination of agreed terms and terms
imposed by arbitration under Section 252 of the Communications Act of 1934, as
modified by the Telecommunications Act of 1996, the rules and regulations of the
Federal Communications Commission, and the orders, rules and regulations of the
Arizona Corporation Commission; and as such does not necessarily represent the
position of either Party on any given issue; and

        WHEREAS, the Parties wish to interconnect their local exchange networks
in a technically and economically efficient manner for the transmission and
termination of calls, so that subscribers of each can seamlessly receive calls
that originate on the others network and place calls that terminate on the
others network, and for Pac-West's use in the provision of exchange access
("Local Interconnection"); and

        WHEREAS, Pac-West wishes to purchase Telecommunications Services for
resale to others, and U S WEST is willing to provide such services; and

        WHEREAS, Pac-West wishes to purchase on an unbundled basis Network
Elements, Ancillary Services and Functions and additional features separately or
in any Combination, and to use such services for itself or for the provision of
its Telecommunications Services to others, and U S WEST is willing to provide
such services;

        Now, therefore, in consideration of the terms and conditions contained
herein, Pac-West and U S WEST hereby mutually agree as follows:

                               SCOPE OF AGREEMENT

        A. This Agreement specifies the rights and obligations of each Party
with respect to the purchase and sale of Local Interconnection, Local Resale and
Network Elements in the LATAs in Arizona where U S WEST operates.

        B. In the performance of their obligations under this Agreement, the
Parties shall act in good faith and consistently with the intent of the Act
Where notice, approval or similar action by a Party is permitted or required by
any provision of this Agreement (including, without limitation, the obligation
of the Parties to further negotiate the resolution of new or open issues under
this Agreement) such action shall not be unreasonably delayed, withheld or
conditioned.

        C. U S WEST will provide Pac-West with at least the level of service
quality or performance of obligations under this Agreement as U S WEST provides
itself or any other Person with respect to all Telecommunications Services,
Local Interconnection, Services for Resale, and Network Elements as applicable
and shall provide such level of service quality or performance of service
obligations in accordance with the specific requirements agreed to in Attachment
5.

        D. U S WEST shall provide to Pac-West Services for Resale that are equal
in quality, subject to the same conditions (including the conditions in U S
WEST's effective tariffs which are not otherwise

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inconsistent with the terms and conditions contained herein), within the same
provisioning time intervals that U S WEST provides these services to itself, its
Affiliates and others, including end users, and in accordance with any
applicable Commission service quality standards, including standards the
Commission may impose pursuant to Section 252 (e)(3) of the Act.

        E. Each Network Element provided by U S WEST to Pac-West shall be at
least equal in the quality of design, performance, features, functions,
capabilities and other characteristics, including, but not limited to, levels
and types of redundant equipment and facilities for power, diversity and
security, that U S WEST provides to itself, U S WEST's own subscribers, to a U S
WEST Affiliate or to any other entity.

        F. The Parties agree to work jointly and cooperatively in testing and
implementing processes for pre-ordering, ordering, maintenance, provisioning and
billing and in reasonably resolving issues which result from such implementation
on a timely basis.

        G. If a Party makes a change in its network which it believes will
materially affect the interoperability of its network with that of the other
Party, the Party making the change shall provide advance notice of such change
to the other Party in accordance with applicable FCC or Commission regulations.

        H. In accordance with Section 251 (c)(5) of the Act and the rules and
regulations established by the FCC and the Commission, the Parties shall provide
reasonable notice of changes in the information necessary for the transmission
and routing of services using that local exchange carrier's facilities or
network, as well as of any other changes that would affect the interoperability
of those facilities and networks.

        I. Except as otherwise provided for in Section 8 of Attachment 2, U S
WEST shall not discontinue or refuse to provide any service required hereunder
without Pac-West's prior written agreement in accordance with Section 17 of this
Part A of this Agreement, nor shall U S WEST reconfigure, reengineer or
otherwise redeploy its network in a manner which would materially impair
Pac-West's ability to offer Telecommunications Services in the manner
contemplated by this Agreement, the Act or the FCC's rules and regulations. U S
WEST agrees that all obligations undertaken pursuant to this Agreement,
including, without limitation, performance standards, intervals, and technical
requirements are material obligations hereof and that time is of the essence.

                                   DEFINITIONS

        Certain terms used in this Agreement shall have the meanings set forth
herein or as otherwise elsewhere defined throughout this Agreement. Other terms
used but not defined herein will have the meanings ascribed to them in the Act
and the FCC's rules and regulations.

"911 Service" means a universal telephone number which gives the public direct
access to the Public Safety Answering Point (PSAP). Basic 911 service collects
911 calls from one or more local exchange switches that serve a geographic area.
The calls are then sent to the correct authority designated to receive such
calls.

"911 Site Administrator" is a person assigned by Pac-West to establish and
maintain 911 service location information for its subscribers.

"Access Services" refers to interstate and intrastate switched access and
private line transport services.

"Pac-West" means Pac-West Communications International, Inc. and any Affiliates,
subsidiary companies or other entities performing any of the obligations of
Pac-West set forth in this Agreement.

"Act" means the Communications Act of 1934 (47 U.S.C. Section 151 et seq.), as
amended by the Telecommunications Act of 1996, and as from time to time
interpreted in the duly authorized rules and regulations of the FCC or by the
Commission.

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"ADSL" or "Asymmetrical Digital Subscriber Line" means a transmission technology
which transmits an asymmetrical digital signal using one of several transmission
methods (for example, carrier-less AM/PM discrete multi-tone, or discrete
wavelet multi-tone).

"Affiliate" is an entity, as defined in the Act, that directly or indirectly
owns or controls, is owned or controlled by, or is under common ownership or
control with, another entity. For the purposes of this Agreement, "own" or
"control" means to own an equity interest (or equivalent) of at least ten
percent (10%), or the right to control the business decisions, management and
policy of another entity performing any of the obligations set forth in this
Agreement.

"AIN" ("Advanced Intelligent Network") is a network functionality that permits
specific conditions to be programmed into a switch which, when met, directs the
switch to suspend call processing and to receive special instructions for
further call handling instructions in order to enable carriers to offer advanced
features and services.

"AIN Services" means architecture and configuration of the AIN Triggers within
the SCP as developed and/or offered by U S WEST to its customers.

"ALI" (Automatic Location Identification) is a database developed for E911
systems that provides for a visual display of the caller's telephone number and
address, and the names of the emergency response agencies responsible for that
address. The ALI also shows an Interim Number Portability (INP) number, if
applicable.

"ALI/DMS" (Automatic Location Identification/Data Management System) means the
emergency service (E911/91 1) database containing subscriber location
information (including name, address, telephone number, and sometimes special
information from the local service provider) used to determine to which Public
Safety Answering Point (PSAP) to route the call.

"AMA" means the Automated Message Accounting structure that initially records
telecommunication message information. AMA format is contained in the Automated
Message Accounting document, published by Bellcore as GR-1 100-CORE, which
defines the industry standard for message recording.

"Ancillary Services" or "Ancillary Functions" means, collectively, the
following: (1) Collocation as described in Section 40; (2) access to poles,
ducts, conduits and rights of way as described in Section 47; (3) unused
transmission media as described in Section 51; (4) Directory Listings as
described in Section 44; (5) E911 as described in Section 50.1; (6) Directory
Assistance Service as described in Section 50.2; (7) Operator Services as
described in Section 50.3; (8) Directory Assistance and Listings services
requests as described in Section 50.4; and (9) directory assistance data as
described in Section 50.5.

"ANI" (Automatic Number Identification) is a feature that identifies and
displays the number of a telephone that originates a call.

"ARS" (Automatic Route Selection) is a service feature that provides for
automatic selection of the least expensive or most appropriate transmission
facility for each call based on criteria programmed into the system.

"ASR" (Access Service. Request) means the industry standard forms and supporting
documentation used for ordering Access Services. The ASR may be used to order
trunking and facilities between Pac-West and U S WEST for Local Interconnection.

"BLV/BLI" (Busy Line Verify/Busy Line Interrupt) means an operator call in which
the end user inquires as to the busy status of, or requests an interruption of,
a telephone call.

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"Business Day" means any day Monday through Friday except for mutually agreed to
holidays.

"CABS" means the Carrier Access Billing System which is defined in a document
prepared by the Billing Committee of the OBF. The Carrier Access Billing System
document is published by Bellcore in Volumes 1, 1A. 2, 3, 3A, 4 and 5 as Special
Reports SR-OPT-001 868, SR-OPT-001 1869, SR-OPT-001871, SR-OPT- SR-OPT-001873,
SR-OPT-001874, and SR-OPT-001875, respectively, and contains the recommended
guidelines for the billing of access and other connectivity services.

"Calling Party Number" or "CPN" is a CCS parameter which refers to the number
transmitted through a network identifying the calling party.

"CCS" (Common Channel Signaling) means a method of digitally transmitting call
set-up and network control data over a digital signaling network fully separate
from the public switched telephone network that carries the actual call.

"Central Office Switch" means a switch used to provide Telecommunications
Services, including, but not limited to:

        (a)    "End Office Switches" which are used to terminate Customer
               station loops for the purpose of interconnecting to each other
               and to trunks;

        (b)    "Tandem Office Switches" which are used to connect and switch
               trunk circuits between and among other Central Office Switches.
               Access tandems provide connections for exchange access and toll
               traffic while local tandems provide connections for local/EAS
               traffic; or

        (c)    Combination End Office/Tandem Office Switches.

"Centrex", including Centrex Plus, means a Telecommunications Service that uses
central office switching equipment for call routing to handle direct dialing of
calls and to provide numerous private branch exchangelike features.

"Charge Number' is a CCS parameter which refers to the number transmitted
through the network identifying the billing number of the calling party.

"CLASS" (Bellcore Service Mark) is a set of call-management service features
that utilize the capability to forward a calling party's number between end
offices as part of call setup. Features include Automatic Callback, Automatic
Recall, Caller ID, Call Trace, and Distinctive Ringing.

"Combinations" means provision by U S WEST of two or more connected Network
Elements ordered by Pac-West to provide its Telecommunication Services in a
geographic area or to a specific subscriber and that are placed on the same or
related order by Pac-West, subject to restrictions, if any, imposed by the
Commission.

"Commission" means the Arizona Corporation Commission.

"Competitive Local Exchange Carrier" or "CLEC" means an entity authorized to
provide Local Exchange Service that does not otherwise qualify as an incumbent
LEC.

"Conduit" means a tube or protected pathway that may be used to house
communication or electrical cables. Conduit may be underground or above ground
(for example, inside buildings) and may contain one or more innerducts.

"Confidential Information" has the meaning set forth in Section 28 of Part A of
this Agreement.

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"Contract Year" means a twelve (12) month period during the term of this
Agreement commencing on the Effective Date and each anniversary thereof.

"Control Office" is an exchange carrier center or office designated as its
company's single point of contact for the provisioning and maintenance of its
portion of local interconnection arrangements.

"Custom Calling Features" is a set of call-management service features available
to residential and business subscribers including call-waiting, call-forwarding
and three-party calling.

"Customer" means a third-party (residence or business) that subscribes to
Telecommunications Services provided by either of the Parties.

"DBMS" (Database Management System) is a computer system used to store, sort,
manipulate and update the data required to provide, for example, selective
routing and ALI.

"Databases" are the Network Elements that provide the functionality for storage
of, access to, and manipulation of information required to offer a particular
service and/or capability. Databases include, but are not limited to: Number
Portability, LIDB, Toll Free Number Database, Automatic Location
Identification/Data Management System, and AIN.

"Digital Signal Level" means one of several transmission rates in the time
division multiplexing hierarchy, including, but not limited to:

        "Digital Signal Level 0" or "DS-0" means the 56 or 64 Kbps zero-level
        signal in the time-division multiplex hierarchy.

        "Digital Signal Level 1 or "DS-1" means the 1.544 Mbps first-level
        signal in the time-division multiplex hierarchy. In the time-division
        multiplexing hierarchy of the telephone network, DS-1 is the initial
        level of multiplexing.

        "Digital Signal Level 3" or "DS-3" means the 44.736 Mbps third-level in
        the time-division multiplex hierarchy. In the time-division multiplexing
        hierarchy of the telephone network, DS-3 is defined as the third level
        of multiplexing.

"Directory Assistance Database" refers to any set of subscriber records used by
U S WEST in its provision of live or automated operator-assisted directory
assistance including, but not limited to, 411, 555-1212, NPA555-1212.

"Directory Assistance Service" provides Listings to callers. Directory
Assistance Service may include the option to complete the call at the caller's
direction.

"Directory Listings" or "Listings" refers to subscriber information, including,
but not limited to, name, address and phone numbers, in Directory Assistance
Service or directory products.

"Discloser" means that Party to this Agreement which has disclosed Confidential
Information to the other Party.

"E911" (Enhanced 911 Service) means a telephone communication service which will
automatically route a call dialed "911" to a designated Public Safety Answering
Point (PSAP) attendant and will provide to the attendant the calling party's
telephone number and, when possible, the address from which the call is being
placed, and the emergency response agencies responsible for the location from
which the call was dialed.

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"E911 Message Trunk" is a dedicated line, trunk or channel between two central
offices or switching devices which provides a voice and signaling path for E911
calls.

"Extended Area Service" ("EAS") is intraLATA traffic treated as "local" traffic
between exchanges (rather than as "toll" traffic) as established by the
Commission and as reflected in the effective U S WEST tariffs.

"Effective Date" is the date, indicated in the Preamble, on which this Agreement
shall become effective.

"Emergency Response Agency" is a governmental entity authorized to respond to
requests from the public to meet emergencies.

"EMR" means the Exchange Message Record System used among LECs for exchanging
telecommunications message information for billable, non-billable, sample,
settlement and study data. EMR format is contained in BR-010-200-010 CRIS
Exchange Message Record, published by Bellcore, which defines the industry
standard for exchange message records.

"ESN" (Emergency Service Number) is a number assigned to the ALI and selective
routing databases for all subscriber telephone numbers. The ESN designates a
unique combination of fire, police and emergency medical service response
agencies that serve the address location of each in-service telephone number.

"FCC" means the Federal Communications Commission.

"FCC  Interconnection  Order" is the  Federal  Communications  Commission's
First  Report and Order in CC Docket No. 96-98 released August 8, 1996, as
effective.

"Fiber-Meet" means an interconnection architecture method whereby the Parties
physically interconnect their networks via an optical fiber interface (as
opposed to an electrical interface) at a mutually agreed upon location.

"Gateway" (ALI Gateway) is a telephone company computer facility that interfaces
with Pac-West's 911 administrative site to receive Automatic Location
Identification (ALI) data from Pac-West. Access to the Gateway will be via a
dial-up modem using a common protocol.

"HDSL" or "High-Bit Rate Digital Subscriber Line" means a two-wire or four-wire
transmission technology which typically transmits a DS-1-level signal (or,
higher level signals with certain technologies), using, for example, 2 Binary/1
Quartenary ("281Q").

"ILEC" means the incumbent local exchange carrier.

"Information Service Traffic" means traffic which originates on a local access
line and which is addressed to an information service provider.

"INP" (Interim Number Portability) is a service arrangement whereby subscribers
who change local service providers may retain existing telephone numbers with
minimal impairment of quality, reliability, or convenience when remaining at
their current location or changing their location within the geographic area
served by the initial carriers serving central office.

"Integrated Digital Loop Carrier"("IDLC") means a digital subscriber loop
carrier system which interfaces with the switch digitally at a DS-1 (1.544Mbps)
or higher level.

"Integrated Services Digital Network" or "ISDN" means a switched network service
that provides end-to-end digital connectivity for the simultaneous transmission
of voice and data. Basic Rate Interface-ISDN (BRI-ISDN) provides for a digital
transmission of two 64 Kbps bearer channels and one 16 Kbps data

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channel (2B+D). Primary Rate Interface-ISDN (PRI-ISDN) provides for a digital
transmission of twenty-three (23) 64 Kbps bearer channels and one 64 Kbps data
channel (23B+D).

"Interconnection" is as described in the Act and refers to the connection of
separate pieces of equipment, facilities, or platforms between or within
networks for the purpose of transmission and routing of telephone exchange
service traffic and exchange access traffic.

"IXC" (Interexchange Carrier) means a provider of interexchange
Telecommunications Services.

"LATA" means Local Access Transport Area.

"LEC" means local exchange carrier.

"LIDB" (Line Information Data Base(s)) is a SCP database that provides for such
functions as calling card validation for telephone line number cards issued by
LECs and other entities and validation for collect and billed-to-third services.

"Local Interconnection" shall have the meaning set forth in the Recitals to this
Agreement.

"Local Resale," "Services for Resale" or "Resale Services" means, collectively,
Telecommunications Services and service functions provided by U S WEST to
Pac-West pursuant to Attachment 2 of this Agreement.

"Local Traffic" is intraLATA traffic within an exchange that is treated as toll
free traffic as established by the Commission and as reflected in the effective
tariffs of U S WEST.

"Loop" is a transmission facility between a distribution frame, or its
equivalent, in a U S WEST central office or wire center, and the Network
Interface Device (as defined herein) or network interface at a subscriber's
premises, to which Pac-West is granted exclusive use. This includes, but is not
limited to, two-wire and fourwire analog voice-grade loops, and two-wire and
four-wire loops that are conditioned to transmit the digital signals needed to
provide ISDN, ADSL, HDSL, and DS-1 level signals. A Loop may be composed of the
following components:

                       Loop Concentrator/Multiplexer
                       Loop Feeder
                       Network Interface Device (NID)
                       Distribution

"Main Distribution Frame" or "MDF" means the distribution frame of the Party
providing the Loop used to interconnect cable pairs and line and trunk equipment
terminals on a switching system or transmission facility.

"MECAB" refers to the Multiple Exchange Carrier Access Billing (MECAB) document
prepared by the Billing Committee of the Ordering and Billing Forum, which
functions under the auspices of the Carrier Liaison Committee (CLC) of the
Alliance for Telecommunications Industry Solutions (ATIS). The MECAB document,
published by Bellcore as Special Report SR-BDS-000983, contains the recommended
guidelines for the billing of an Access Service provided by two or more LECs
(including a LEC and a CLEC), or by one LEC in two or more states within a
single LATA.

"MECOD" refers to the Multiple Exchange Carriers Ordering and Design (MECOD)
Guidelines for Access Services -Industry Support Interface, a document developed
by the Ordering/Provisioning Committee under the auspices of the Ordering and
Billing Forum, which functions under the auspices of the Carrier Liaison
Committee (CLC) of the Alliance for Telecommunications Industry Solutions (ATIS)
The MECOD document, published by Bellcore as Special Report SR STS-002643,
establishes recommended guidelines for

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processing orders for Access Service which is to be provided by two or more LECs
(including a LEC and a CLEC). It is published by Bellcore as SRBDS 00983.

"Meet-Point Billing" or "MPB" refers to an arrangement whereby two LECs
(including a LEC and Pac-West) jointly provide Switched Access Service to an
Interexchange Carrier, with each LEC (or Pac-West) receiving an appropriate
share of the access element revenues.

"Mid-Span Meet" is a point of interconnection between two networks, designated
by two Telecommunications Carriers, at which one carriers responsibility for
service begins and the other carriers responsibility ends.

"MSAG" (Master Street Address Guide) is a database defining the geographic area
of an E911 service. It includes an alphabetical list of the street names,
high-low house number ranges, community names, and emergency service numbers
provided by the counties or their agents to U S WEST.

"North American Numbering Plan" or "NANP" means the numbering plan used in the
United States that also serves Canada,- Bermuda, Puerto Rico and certain
Caribbean Islands. The NANP format is a 10-digit number that consists of a
3-digit NPA code (commonly referred to as the area code), followed by a 3-digit
NXX code and 4-digit line number.

"NENA" (National Emergency Number Association) is an association with a mission
to foster the technological advancement, availability and implementation of 911
nationwide.

"Network Element" means a facility or equipment used in the provision of a
Telecommunications Service including all features, functions and capabilities
embedded in such facility or equipment.1

"NP" (Number Portability) means the use of the Location Routing Number (LRN)
database solution to provide fully transparent NP for all subscribers and all
providers without limitation.

"NPA" (Numbering Plan Area) (sometimes referred to as an area code) is the three
digit indicator which is designated by the first three digits of each 10-digit
telephone number within the NANP. Each NPA contains 792 possible NXX Codes.
There are two general categories of NPA, "geographic NPAs" and "NonGeographic
NPAs." A "Geographic NPA" is associated with a defined geographic area, and all
telephone numbers bearing such NPA are associated with services provided within
that geographic area. A "NonGeographic NPA," also known as a "Service Access
Code (SAC Code)" is typically associated with a specialized Telecommunications
Service which may be provided across multiple geographic NPA areas; 500, 800,
900, 700, and 888 are examples of Non-Geographic NPAs.

"NXX" means the fourth, fifth and sixth digits of a ten-digit telephone number
within the North American Numbering Plan.

"OBF" means the Ordering and Billing Forum, which functions under the auspices
of the Carrier Liaison Committee (CLC) of the Alliance for Telecommunications
Industry Solutions (ATIS).

"Operator Services" includes, but is not limited to, (1) operator handling for
call completion (e.g., collect calls); (2) operator or automated assistance for
billing after the subscriber has dialed the called number (e.g., credit card
calls); and (3) special services (e.g., BLV/BLI, emergency agency call).

"Operator Systems" is the Network Element that provides operator and automated
call handling with billing, special services, subscriber telephone listings, and
optional call completion services.

----------
1       AT&T Order, page 11, Issue 18 and MCIm Order at p. 24.

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"P.01 Transmission Grade of Service (GOS)" means a trunk facility provisioning
standard with the statistical probability of no more than one call in 100
blocked on initial attempt during the average busy hour.

"PLU" (Percent Local Usage) is a calculation which represents the ratio of the
local minutes to the sum of local and intraLATA toll minutes between exchange
carriers sent over Local Interconnection trunks. Directory assistance, BLV/BLI,
900, 976, transiting calls from other exchange carriers and switched access
calls are not included in the calculation of PLU.

"Party" means either U S WEST or Pac-West and "Parties" means U S WEST and
Pac-West.

"Person" means, collectively, an Affiliate, subsidiary, Customer, end user and
subscriber of U S WEST.

"Point of Interconnection" or "POI" means the physical point that establishes
the technical interface, the test point, where applicable, and the operational
responsibility hand-off between Pac-West and U S WEST for the local
interconnection of their networks for the mutual exchange of traffic.

"Point of Interface" is the physical point where Pac-West hands off transmission
media to the U S WEST provided entrance facility associated with a collocation
arrangement for the purpose of connecting the entrance facility to some point
located within U S WEST's premises.

"Pole Attachment" means the connection of a facility to a utility pole. Some
examples of facilities are mechanical hardware, grounding and transmission
cable, and equipment boxes.

"POP" means an IXC's point of presence.

"Port" means a termination on a Central Office Switch that permits Customers to
send or receive Telecommunications Services over the public switched network,
including switch features or switching functionality.2

"Premium Listing", such as additional, foreign, cross reference, informational,
non-listed, privacy, etc. are as described in the U S WEST general exchange
Listing tariff.

"Primary Listing" (for example, main list, additional main, joint user, client
main list or answering service list) shall mean the one appearance of an end
user telephone subscribers main telephone number and other content such as name
and address, which each Pac-West residence or business subscriber is entitled to
receive in the white pages directory published by U S WEST Dex at no charge from
U S WEST Communications. Where U S WEST business end users are entitled to
receive a courtesy Listing in the yellow pages section of any directory
published on U S WEST's behalf, Pac-West's business customers will receive the
same entitlement.

"Proprietary Information" shall have the same meaning as Confidential
Information.

"PSAP" (Public Safety Answering Point) is the public safety communications
center where 911 calls placed by the public for a specific geographic area will
be answered.

"Rate Center" means the geographic point and corresponding geographic area which
are associated with one or more particular NPA-NXX codes which have been
assigned to U S WEST or Pac-West, for its provision of basic exchange
Telecommunications Services. The "Rate Center Point" is the finite geographic
point identified by a specific V&H coordinate, which is used to measure
distance-sensitive end user traffic to/from the particular NPA-NXX designations
associated with the specific Rate Center. The "Rate Center Area" is the
exclusive geographic area identified as the area within which U S WEST or
Pac-West will provide

----------

2       AT&T Order, page 11, Issue 18 and MCIm Order at p. 24.

                                       9
<PAGE>

basic exchange Telecommunications Services bearing the particular NPA-NXX
designations associated with the specific Rate Center. The Rate Center Point
must be located within the Rate Center Area.

"Rating Point" means the point at which transport mileage is calculated for the
termination of calls. Each Party shall establish its own Rating Point(s) for its
own services.

"Real Time" means the actual time in which an event takes place, with the
reporting on or the recording of the event simultaneous with its occurrence.

"Recipient" means that Party to this Agreement (1) to which Confidential
Information has been disclosed by the other Party, or (2) who has obtained
Confidential Information in the course of providing services under this
Agreement.

"Reseller" is a category of Telecommunications Services providers who obtain
Telecommunications Services from another provider through the purchase of
wholesale priced services for resale to their end user subscribers.

"Routing Point" means a location which U S WEST or Pac-West has designated on
its own network as the homing (routing) point for traffic inbound to basic
exchange Telecommunications Services provided by U S WEST or Pac-West which bear
a certain NPA-NXX designation. The Routing Point is employed to calculate
mileage measurements for the distance-sensitive transport element charges of
Switched Access Services. Pursuant to Bellcore Practice BR 795-100-100, the
Routing Point maybe an "End Office" location, or a "LEC Consortium Point of
Interconnection." Pursuant to that same Bellcore Practice, examples of the
latter shall be designated by a common language location identifier (CLLI) code
with (x)KD in positions 9, 10, 11, where (x) may by any alphanumeric A-Z or 0-9.
The Routing Point need not be the same as the Rate Center Point, nor must it be
located within the Rate Center Area, but must be in the same LATA as the NPA

"ROW" (Right of Way) means the right to use the land or other property owned,
leased, or controlled by another party to place poles, conduits, cables, other
structures and equipment, or to provide passage to access such structures and
equipment. A ROW may run under, on, or above public or private property
(including air space above public or private property) and may include the right
to use discrete space in buildings, building complexes or other locations.

"SAG" (Street Address Guide) is a database containing an alphabetical list of
street names, high-low house number ranges, descriptive addresses, community
names, tax codes, subscriber names, telephone numbers, NXXs, central office
names, CLLI and other information maintained by U S WEST.

"SECAB" means the Small Exchange Carrier Access Billing document prepared by the
Billing Committee of the OBF. The Small Exchange Carrier Access Billing
document, published by Bellcore as Special Report SR OPT-001856, contains the
recommended guidelines for the billing of access and other connectivity
services.

"Selective Routing" is a service which automatically routes an E911 call to the
PSAP that has jurisdictional responsibility for the service address of the
telephone from which 911 is dialed, irrespective of telephone company exchange
or wire center boundaries.

"Service Control Point" or "SCP" is a specific type of Database Network Element
functionality deployed. in a Signaling System 7 (SS7) network that executes
service application logic in response to SS7 queries sent to it by a switching
system also connected to the SS7 network. SCPs also provide operational
interfaces to allow for provisioning, administration and maintenance of
subscriber data and service application data (e.g., a toll free database stores
subscriber record data that provides information necessary to route toll free
calls).

"Signaling Transfer Points" or "STPs" provide functionality that enable the
exchange of SS7 messages among and between switching elements, database elements
and Signaling Transfer Points.

                                       10
<PAGE>

"Switch" - See Central Office Switch.

"Switched Access", "Switched Access Service", "Switched Exchange Access Service"
or "Switched Access Traffic" are as defined in the Parties' applicable tariffs.

"Tandem Office Switches" are Class 4 switches which are used to connect and
switch trunk circuits between and among End Office Switches and other tandems.

"Tariff Services" as used throughout this Agreement refers to the applicable
Party's interstate tariffs and state tariffs, price lists, price schedules and
catalogs.

"Technically Feasible" refers solely to technical or operational concerns,
rather than economic, space, or site considerations, in accordance with the
rules and regulations of the FCC and the Commission.

"Telecommunications" means the transmission, between or among points specified
by the user, of information of the user's choosing, without change in the form
or content of the information as sent and received.

"Telecommunications Carrier" means any provider of Telecommunications Services,
except that such term does not include aggregators of Telecommunications
Services (as defined in Section 226 of the Act). A Telecommunications Carrier
shall be treated as a common carder under the Act only to the extent that it is
engaged in providing Telecommunications Services, except that the Commission
shall determine whether the provision of fixed and mobile satellite service
shall be treated as common carriage.

"Telecommunications Services" means the offering of Telecommunications for a fee
directly to the public, or to such classes of users as to be effectively
available directly to the public, regardless of the facilities used.

"Toll Traffic" is traffic that originates in one Rate Center and terminates in
another Rate Center with the exception of traffic that is rated as EAS.

"Transit Service" provides the ability for a Telecommunications Carrier to use
its connection to a local or access tandem for delivery of calls that originate
with a Telecommunications Carrier and terminate to a company other than the
tandem company, such as another Competitive Local Exchange Carrier, an existing
LEC, or a wireless car7ier. In these cases, neither the originating nor
terminating end user is a customer of the tandem Telecommunications Carrier. The
tandem Telecommunications Carrier will accept traffic originated by a Party and
will terminate it at a Point of Interconnection with another local, intraLATA or
interLATA network Telecommunications Carrier. This service is provided through
local and access tandem switches.

"Transit Traffic" is any traffic, other than Switched Access Traffic, that
originates from one Telecommunications Carrier's network, transits another
Telecommunications Carrier's network, and terminates to yet another
Telecommunications Carrier's network.

"TRCO" means Trouble Reporting Control Office.

"U S WEST" means U S WEST Communications, Inc. and any Affiliates, subsidiary
companies or other entities performing any of the obligations of U S WEST set
forth in this Agreement.

"Voluntary Federal Subscriber Financial Assistance Programs" are
Telecommunications Services provided to low-income subscribers, pursuant to
requirements established by the appropriate federal or state regulatory body.

                                       11
<PAGE>

"Wire Center" denotes, for the purposes of collocation, a building or space
within a building, that serves as an aggregation point on a given carrier's
network, where transmission facilities and circuits are connected or switched.
Wire Center can also denote a building where one or more central offices, used
for the provision of Telecommunications Services and Access Services, are
located. Wire Center shall mean those points eligible for such connections as
specified in the FCC Docket No. 91-141, and rules adopted pursuant thereto.

                              TERMS AND CONDITIONS

1.      General Provisions

     1.1       Each Party is individually responsible to provide facilities
               within its network which are necessary for routing, transporting,
               measuring, and billing traffic from the other Party's network and
               for delivering such traffic to the other Party's network in the
               standard format compatible with Pac-West's network and to
               terminate the traffic it receives in that standard format or the
               proper address on its network. The Parties are each solely
               responsible for participation in and compliance with national
               network plans, including the National Network Security Plan and
               the Emergency Preparedness Plan.

     1.2       Neither Party shall impair the quality of service to other
               carriers or to either Party's Customers, and each Party may
               discontinue or refuse service if the other Party violates this
               provision. Upon such violation, either Party shall provide the
               other Party notice of such violation, at the earliest practicable
               time.

     1.3       Each Party is solely responsible for the services it provides to
               its Customers and to other Telecommunications Carriers.

               1.3.1     The Parties recognize that equipment vendors may
                         manufacture telecommunications equipment that does not
                         fully incorporate and may deviate from industry
                         standards referenced in this Agreement. Due to the
                         manner in which individual equipment manufacturers have
                         chosen to implement industry standards into the design
                         of their products, along with differing vintages of
                         individual facility components and the presence of
                         embedded technologies pre-dating current technical
                         standards, some of the individual facility components
                         deployed within U S WEST's network, including, without
                         limitation, Network Elements and associated business
                         processes and the standards associated with the
                         equipment providing such Network Elements
                         (collectively, "Network Components"), may not adhere to
                         all the specifications set forth and described in the
                         Bellcore, ANSI, ITU and other technical and performance
                         standards outlined in this Agreement. Within forty-five
                         (45) days after the Effective Date of this Agreement,
                         the Parties will develop processes by which U S WEST
                         will inform Pac-West of deviations or planned
                         deviations, and the implementation date of such planned
                         deviations, from standards referenced in this Agreement
                         for Network Components that may be ordered by Pac-West.
                         In addition, the Parties agree that those deviations
                         from such standards documented by U S WEST to Pac-West
                         shall, to the extent permitted by FCC and Commission
                         rules and regulations, supersede sections of this
                         Agreement referencing technical standards otherwise
                         applicable for the affected Network Elements.

               1.3.2     U S WEST agrees that in no event shall it intentionally
                         allow any Network Component provided by U S WEST to
                         Pac-West under this Agreement to perform below the
                         standards or deviations therefrom reflected in Section
                         1.3.1, except where requested by Pac-West. U S WEST
                         shall minimize any degradation to its equipment
                         relative to currently applicable service, where
                         reasonable in view of

                                       12
<PAGE>

                         industry adopted performance standards and
                         technological developments. Written notice (the "Change
                         Notice") of any planned changes in standards for any
                         Network Component which could impact that Network
                         Component will be provided at least ninety (90) days
                         (or at the make/buy point) prior to the planned
                         implementation. If Pac-West notifies U S WEST of how
                         the proposed change may adversely impact Pac-West or
                         its Customers within fourteen (14) calendar days after
                         receipt of U S WEST's Change Notice, U S WEST and
                         Pac-West will schedule joint discussions to address and
                         attempt to resolve the matter, including, without
                         limitation, consideration of proposed alternatives. In
                         addition, if U S WEST learns that any Network Component
                         purchased by Pac-West under this Agreement has been
                         permitted (even if not intentionally) to fall
                         materially below the level or specification in effect
                         as of the Effective Date of this Agreement, U S WEST
                         shall inform Pac-West immediately.

               1.3.3     The Parties recognize that providing a number of the
                         services specified in this Agreement depends upon the
                         "technical feasibility" of providing that service, as
                         that term is defined under the Act and/or by FCC or
                         Commission rules and decisions. If the Parties cannot
                         agree on whether providing a service is technically
                         feasible, the matter, including cost and expenses (if
                         any), shall be resolved through good faith negotiation
                         or the dispute resolution process outlined in this
                         Agreement.

2.      Most Favored Nation Terms and Treatment

        2.1    Until such time as there is a final court determination
               interpreting Section 252(i) of the Act, U S WEST shall make
               available to Pac-West the terms and conditions of any other
               agreement for Interconnection, unbundled Network Elements and
               resale services approved by the Commission under Section 252 of
               the Act, in that agreement's entirety. After there is a final
               court determination interpreting Section 252(i) of the Act, the
               Parties agree to revise this Section 2.1 to reflect such
               interpretation.3

3.      Payment

        3.1    In consideration of the services provided by U S WEST under this
               Agreement Pac-West shall pay the charges set forth in Attachment
               1 to this Agreement. The billing procedures for charges incurred
               by Pac-West hereunder are set forth in Attachment 5 to this
               Agreement

        3.2    Amounts payable under this Agreement, unless reasonably disputed,
               are due and payable within thirty (30) days after the date of U S
               WEST's invoice or within twenty (20) days after receipt of the
               invoice, whichever is later. If the payment due date is not a
               Business Day, the payment shall be made the next Business Day.

        3.3    A late payment charge of 1.5% applies to all billed balances, not
               reasonably disputed, which are not paid within the applicable
               time period set forth in Section 3.2 above. To the extent
               Pac-West pays the billed balance on time, but the amount of the
               billed balance is reasonably disputed by Pac-West, and, it is
               later determined that a refund is due Pac-West, interest shall be
               payable on the refunded amount in the amount of 1.5% per month.
               To the extent Pac-West pays the billed balance on time, but the
               amount of the billed balance is reasonably disputed by Pac-West,
               and, it is later determined that no refund is due Pac-West, no
               interest shall be payable on the disputed amount.

----------

3    MCIm Order, p. 29 and AT&T Order, p. 35.

                                       13
<PAGE>

        3.4    Late payment charges shall not be used as a "credit" to a
               deposit, if any, without the express approval of U S WEST.

        3.5    Unless specified otherwise in this Agreement, U S WEST shall bill
               all amounts due from Pac-West for each resold service in
               accordance with the terms and conditions as specified in the U S
               WEST tariff.

4.      Taxes

        4.1    Any federal, state or local excise, sales, or use taxes
               (excluding any taxes levied on income) resulting from the
               performance of this Agreement shall be borne by the Party upon
               which the obligation for payment is imposed under applicable law,
               even if the obligation to collect and remit such taxes is placed
               upon the other Party. Any such taxes shall be shown as separate
               items on applicable billing documents between the Parties. The
               Party so obligated to pay any such taxes may contest the same in
               good faith, at its own expense, and shall be entitled to the
               benefit of any refund or recovery, provided that such Party shall
               not permit any lien to exist on any asset of the other Party by
               reason of the contest. The Party obligated to collect and remit
               taxes shall cooperate fully in any such contest by the other
               Party by providing records, testimony and such additional
               information or assistance as may reasonably be necessary to
               pursue the contest. To the extent a sale is claimed to be for
               resale tax exemption, the purchasing Party shall furnish the
               providing Party a proper resale tax exemption certificate as
               authorized or required by statute or regulation by the
               jurisdiction providing said resale tax exemption. Failure to
               timely provide said resale tax exemption certificate will result
               in no exemption being available to the purchasing Party  during
               the applicable reporting period.

5.      Intellectual Property

        5.1    Obligations of Party Requesting Access. As a condition to the
               access or use of patents, copyright, trade secrets, and other
               intellectual property (including software) owned or controlled by
               a third party to the extent necessary to implement this Agreement
               or specifically required by the then applicable federal and state
               rules and regulations relating to Interconnection and access to
               telecommunications facilities and services ("Third Party
               Intellectual Property"), the Party providing access may require
               the other, upon written notice from time to time, to obtain a
               license or permission for such access or use of Third Party
               Intellectual Property, make all payment, if any, in connection
               with obtaining such license, and provide evidence of such
               license.

        5.2    Obligations of Party Providing Access. The Party providing access
               shall provide a list of all known and necessary Third Party
               Intellectual Property applicable to the other Party, and take all
               necessary and appropriate steps to facilitate the negotiation of
               any mandatory licenses. The treatment of third party licenses
               shall be in accordance with FCC rules and regulations and/or
               judicial determinations.

        5.3    Any intellectual property jointly developed in the course of
               performing this Agreement shall belong to both Parties who shall
               have the right to grant non-exclusive licenses to third parties
               except as otherwise designated in writing by one Party to
               another. Any intellectual property which originates from or is
               developed by a Party shall remain in the exclusive ownership of
               that Party. Except for a limited license to use patents or
               copyrights to the extent necessary for the Parties to use any
               facilities or equipment (including software) or to receive any
               service solely as provided under this Agreement, no license in
               patent, copyright trademark or trade secret or other proprietary
               or intellectual property presently or hereafter

                                       14
<PAGE>

               owned, controlled or licensable by a Party, is granted to the
               other Party or shall be implied or allse by estoppel.

6.      Severability

        6.1    In the event that any one or more of the provisions contained
               herein shall for any reason be held to be unenforceable or
               invalid in any respect under law or regulation, the Parties will
               negotiate in good faith for replacement language. If any part of
               this Agreement is held to be invalid or unenforceable for any
               reason, such invalidity or unenforceability will affect only the
               portion of this Agreement which is invalid or unenforceable. In
               all other respects this Agreement will stand as if such invalid
               or unenforceable provision had not been a part hereof, and the
               remainder of this Agreement shall remain in full force and
               effect.

7.      Responsibility for Environmental Contamination

        7.1    Pac-West shall in no event be liable to U S WEST for any costs
               whatsoever resulting from the presence or release of any
               environmental hazard Pac-West did not introduce to the affected
               work location. U S WEST shall, at Pac-West's request, indemnify,
               defend, and hold harmless Pac-West, and each of its officers,
               directors and employees from and against any losses, damages,
               claims, demands, suits, liabilities, fines, penalties and
               expenses (including reasonable attorneys' fees) arising out of or
               resulting from (a) any environmental hazard U S WEST, its
               contractors or agents introduce to the work location, or (b) the
               presence or release of any environmental hazard for which U S
               WEST is responsible under applicable law.

        7.2    U S WEST shall in no event be liable to Pac-West for any costs
               whatsoever resulting from the presence or release of any
               environmental hazard U S WEST did not introduce to the affected
               work location. Pac-West shall, at U S WEST's request, indemnify,
               defend, and hold harmless U S WEST, and each of its officers,
               directors and employees from and against any losses, damages,
               claims, demands, suits, liabilities, fines, penalties and
               expenses (including reasonable attorneys' fees) arising out of or
               resulting from (a) any environmental hazard Pac-West, its
               contractors or agents introduce to the work location, or (b) the
               presence of release of any environmental hazard for which
               Pac-West is responsible under applicable law.

        7.3    In the event any suspect materials within U S WEST-owned,
               operated or leased facilities are identified to be
               asbestos-containing, Pac-West will ensure that, to the extent any
               activities which it undertakes in the facility disturb such
               suspect materials, such Pac-West activities will be in accordance
               with applicable local, state and federal environmental and health
               and safety statutes and regulations. Except for abatement
               activities undertaken by Pac-West or equipment placement
               activities that result in the generation of asbestos containing
               material, Pac-West shall not have any responsibility for
               managing, nor be the owner of, not have any liability for, or in
               connection with, any asbestos containing material. U S WEST
               agrees to immediately notify Pac-West if U S WEST undertakes any
               asbestos control or asbestos abatement activities that
               potentially could affect Pac-West equipment or operations,
               including, but not limited to, contamination of equipment.

        7.4    Each Party will be solely responsible, at its own expense, for
               proper handling, storing, transport and disposal of all (a)
               substances or materials that it or its contractors or agents
               bring to, create or assume control over at work locations, or (b)
               waste resulting therefrom or otherwise generated in connection
               with its or its contractors' or agents' activities at the work
               locations.

                                       15
<PAGE>

8.      Branding

8.1(4)  Except as provided in this Agreement, at Pac-West's request, U S WEST
        shall be obligated to provide branding and unbranding of services
        provided to Pac-West Customers pursuant to this Agreement in a
        nondiscriminatory manner consistent with the branding of such services
        to U S WEST Customers.

8.2(5)  If Pac-West requests that a service provided under this Agreement be
        branded as an Pac-West service and U S WEST informs Pac-West that such
        branding is not available or if it is not practical to so brand the
        service, then U S WEST will offer Pac West the service on an unbranded
        basis at Pac-West's request.

8.3(6)  Without limitation of the provisions of Section 8.1 and 8.2, if U S WEST
        is offering a service on an unbranded basis, U S WEST may brand such
        service with the U S WEST brand only if U S WEST also offers to brand
        the service with the Pac-West brand.

8.4     [Intentionally left blank for numbering consistency]

8.5.(7) U S WEST will not be required to rebrand uniforms and vehicles. The
        uniforms of U S WEST's repair and maintenance personnel shall bear the
        same or less U S WEST branding than was present as of February 8, 1996.

8.6     Computerized Programming

        8.6.1  Repair bills or receipts handed to the end user at the time
               service is rendered may bear the U S WEST brand. If the
               computerized programming which either informs the repair
               employees of the address and service needed, or prints the
               receipts, can be modified, at a reasonable cost, to use the brand
               of a selection of Pac-West, then U S WEST shall provide that
               customized programming. Otherwise, the receipt may bear the brand
               of U S WEST's repair and maintenance, and will add that it
               provides authorized repair and maintenance for, and list the
               CLECs for which U S WEST is contracted to provide service. If U S
               WEST's computerized programming can be modified to inform U S
               WEST's employee for which CLEC service is being rendered, the
               repair employee may be required to circle or otherwise indicate
               the name of the appropriate CLEC on the receipt or other form.

        8.6.2  If U S WEST chooses to use its logo on the above forms, it may
               only do so if it also uses the logos of the CLECs. If U S WEST's
               Customers are served by its own repair and maintenance, U S
               WEST's name should be listed with the other CLECs.

----------

4    Arizona Bench Order, May 29, 1997 Hearing, pp. 1582-3; Procedural Order,
     July 14, 1997 at page 2-3.
5    Id.
6    Id.
7    Bolded language in Sections 8.5 and 8.6 included per MCIm Order, pp. 13-14
     at Issue 23 and AT&T Order at Issue 30.

                                       16
<PAGE>

        8.6.3  Typeface, font, and appearances of the names, size and appearance
               of the logos of the CLECs and U S WEST in all locations must be
               the same.

        8.6.4  U S WEST will not be held liable for any unintentional errors
               that occur in the branding process.

        8.6.5  The foregoing steps to rebrand repair and maintenance service
               need only be taken by U S WEST where technically feasible.

8.7    U S WEST shall provide, for Pac-West's review, the methods and
       procedures, training and approaches to be used by U S WEST to assure that
       U S WEST meets Pac-West's branding requirements.

8.8    This Section 8 shall confer on U S WEST no rights to the service marks,
       trademarks and trade names owned by or used in connection with services
       by Pac-West or its Affiliates, except as expressly permitted by Pac-West.

8.9    At the request of Pac-West and where technically feasible, U S WEST will
       rebrand operator services and directory assistance in Pac-West's name.(8)

8.10   The expense of rebranding operator services and directory assistance, if
       required by Pac-West, shall be included as a forward looking economic
       cost, such cost to be resolved in the future arbitration to be conducted
       by the Commission as it considers cost studies.(9)

9.      Independent Contractor Status

        9.1    Nothing contained herein shall constitute the Parties as joint
               venturers, partners, employees or agents of one another, and
               neither Party shall have the right or power to bind or obligate
               the other.

        9.2    Each Party is an independent contractor, and has and hereby
               retains the right to exercise full control of and supervision
               over its own performance or its obligations under this Agreement
               and retains full control over the employment, direction,
               compensation and discharge of all employees assisting in the
               performance of such obligations. Each Party will be solely
               responsible for all matters relating to payment of such
               employees, including compliance with social security taxes,
               withholding taxes, and other payroll taxes with respect to their
               respective employees, as well as any taxes, contributions or
               other obligations imposed by applicable state unemployment or
               workers' compensation acts and all other regulations governing
               such matters. Each Party has sole authority and responsibility to
               hire, fire and otherwise control its employees.

        9.3    Subject to the limitations on liability and except as otherwise
               provided in this Agreement, each Party shall be responsible for
               (a) its own acts and performance of all obligations imposed by
               applicable law in connection with its activities, legal status
               and property, real or personal, and (b) the acts of its own
               Affiliates, employees, agents and contractors during the
               performance of that Party's obligations hereunder. Except for
               provisions herein expressly authorizing one Party to act for the
               other, nothing in this Agreement shall constitute a Party as a
               legal representative or agent of the other Party, nor shall a
               Party have the right or

----------

(8)  AT&T Order, p. 31 at Issue 62.
(9)  AT&T Order, p. 18 at Issue 30.

                                       17
<PAGE>

               authority to assume, create or incur any liability or any
               obligation of any kind, express or implied, against or in the
               name or on behalf of the other Party unless otherwise expressly
               permitted by such other Party. Except as otherwise expressly
               provided in this Agreement, neither Party shall undertake to
               perform any obligation of the other Party, whether regulatory or
               contractual, or to assume any responsibility for the management
               of the other Party's business.

10.     Referenced Documents

        10.1   All references to Sections, Exhibits, and Schedules shall be
               deemed to be references to Sections of, and Exhibits and
               Schedules to, this Agreement unless the context shall otherwise
               require. Whenever any provision of this Agreement refers to a
               technical reference, technical publication, Pac-West practice, U
               S WEST practice, any publication of telecommunications industry
               administrative or technical standards, or any other document
               specifically incorporated into this Agreement, it will be deemed
               to be a reference to the most recent version or edition
               (including any amendments, supplements, addenda, or successors)
               or such document that is in effect, and will include the most
               recent version or edition (including any amendments, supplements,
               addenda, or successors) of each document incorporated by
               reference in such a technical reference, technical publication,
               Pac-West practice, U S WEST practice, or publication of industry
               standards, unless Pac-West elects otherwise.

11.     Publicity and Advertising

        11.1   Neither Party shall publish or use any advertising, sales
               promotions or other publicity materials that use the other
               Party's logo, trademarks or service marks without the prior
               written approval of the other Party.

12.     Executed in Counterparts

        12.1   This Agreement may be executed in any number of counterparts,
               each of which shall be deemed an original, but such counterparts
               shall together constitute one and the same instrument.

13.     Headings Not Controlling

        13.1   The headings and numbering of Sections, Parts, Appendices and
               Attachments in this Agreement are for convenience only and shall
               not be construed to define or limit any of the terms herein or
               affect the meaning or interpretation of this Agreement.

14.     Joint Work Product

        14.1   This Agreement is the joint work product of the Parties and has
               been negotiated by the Parties and their respective counsel and
               shall be fairly interpreted in accordance with its terms and, in
               the event of any ambiguities, no inferences shall be drawn
               against either Party.

15.     Survival

        15.1   Any liabilities or obligations of a Party for acts or omissions
               prior to the cancellation or termination of this Agreement any
               obligation of a Party under the provisions regarding
               indemnification, confidential information, limitation of
               liability, and any other provisions of this Agreement which, by
               their terms, are contemplated to survive, or to be performed
               after, termination of this Agreement, shall survive cancellation
               or termination thereof.

                                       18
<PAGE>

16.     Effective Date

        16.1   This Agreement shall become effective pursuant to Sections 251
               and 252 of the Act, upon Commission approval, or direction from
               the Commission that Interconnection ought to take place pending
               Commission approval.

17.     Amendment of Agreement

        17.1   Except as otherwise provided in this Agreement, no amendment or
               waiver of any provision of this Agreement, and no consent to any
               default under this Agreement, shall be effective unless the same
               is in writing and signed by an officer of the Party against whom
               such amendment, waiver or consent is claimed. If either Party
               desires an amendment to this Agreement during the term of this
               Agreement, it shall provide written notice thereof to the other
               Party describing the nature of the requested amendment. If the
               Parties are unable to agree on the terms of the amendment within
               thirty (30) days after the initial request therefor, the Party
               requesting the amendment may invoke the dispute resolution
               process under Section 27 of this Part A of this Agreement to
               determine the terms of any amendment to this Agreement.

18.     Indemnification

        18.1   Notwithstanding any limitations in remedies contained in this
               Agreement, each Party (the "Indemnifying Party") will indemnify
               and hold harmless the other Party ("Indemnified Party") from and
               against any loss, cost, claim, liability, damage and expense,
               including reasonable attorney's fees, to third parties, relating
               to or arising out of the libel, slander, invasion of privacy,
               misappropriation of a name or likeness, actual or alleged
               infringement or other violation or breach of any patent,
               copyright, trademark, service mark, trade name, trade dress,
               trade secret or any other intellectual property presently
               existing or later created, negligence or willful misconduct by
               the Indemnifying Party, its employees, agents, or contractors in
               the performance of this Agreement or the failure of the
               Indemnifying Party to perform its obligations under this
               Agreement. In addition, the Indemnifying Party will, to the
               extent of its obligations to indemnify hereunder, defend any
               action or suit brought by a third party against the Indemnified
               Party. If, after the Party providing access under this Agreement
               gives written notice to the other Party pursuant to Section 5.1,
               the other Party fails to obtain a license or permission for
               access or use of Third Party Intellectual Property, the Party
               providing access shall have no indemnification obligation
               hereunder for any loss, cost, claim, liability, damage and
               expense, including reasonable attorney's fees, to third parties,
               relating to or arising out of the failure of the other Party to
               obtain such license or permission(10)

        18.2   The Indemnified Party will notify the Indemnifying Party promptly
               in writing of any written claim, lawsuit, or demand by third
               parties for which the Indemnified Party alleges that the
               Indemnifying Party is responsible under this Section 18 and
               tender the defense of such claim, lawsuit or demand to the
               Indemnifying Party. Failure to so notify the Indemnifying Party
               shall not relieve the Indemnifying Party of any liability that
               the Indemnifying Party might have, except to the extent that such
               failure prejudices the Indemnifying Party's ability to defend
               such claim.

----------

10      Procedural Order, July 14,1997, pages 4-5.

                                       19
<PAGE>

        18.3   The Indemnified Party also will cooperate in every reasonable
               manner with the defense or settlement of such claim, demand, or
               lawsuit. The Indemnifying Party shall keep the Indemnified Party
               reasonably and timely apprised of the status of the claim, demand
               or lawsuit. The Indemnified Party shall have the right to retain
               its own counsel, including inhouse counsel, at its expense, and
               participate in but not direct the defense; provided, however,
               that if there are reasonable defenses in addition to those
               asserted by the Indemnifying Party, the Indemnified Party and its
               counsel may raise and direct such defenses, which shall be at the
               expense of the Indemnifying Party.

        18.4   The Indemnifying Party will not be liable under this Section 18
               for settlements or compromises by the Indemnified Party of any
               claim, demand or lawsuit unless the Indemnifying Party has
               approved the settlement or compromise in advance or unless the
               defense of the claim, demand or lawsuit has been tendered to the
               Indemnifying Party in writing and the Indemnifying Party has
               failed to timely undertake the defense. In no event shall the
               Indemnifying Party settle or consent to any judgment pertaining
               to any such action without the prior written consent of the
               Indemnified Party.

19.     Limitation of Liability

        19.1   Except as otherwise provided in the indemnity section, no Party
               shall be liable to the other Party for any Loss, defect or
               equipment failure caused by the conduct of the other Party, the
               other Party's agents, servants, contractors or others acting in
               aid or concert with the other Party.

        19.2   [intentionally left blank for numbering consistency]

        19.3   In no event shall either Party have any liability whatsoever to
               the other Party for any indirect, special, consequential,
               incidental or punitive damages, including, but not limited to,
               loss of anticipated profits or revenue or other economic loss in
               connection with or arising from anything said, omitted or done
               hereunder (collectively, "Consequential Damages"), even if the
               other Party has been advised of the possibility of such damages;
               provided, that the foregoing shall not limit a Party's obligation
               to indemnify, defend and hold the other Party harmless against
               any amounts payable to a third party, including any losses,
               costs, fines penalties, criminal or civil judgments or
               settlements, expenses (including attorneys' fees) and
               Consequential Damages of such third party. Nothing contained in
               this section shall limit either Party's liability to the other
               for (i) willful or intentional misconduct (including gross
               negligence); (ii) bodily injury, death or damage to tangible real
               or tangible personal property proximately caused by such party's
               negligent act or omission or that of their respective agents,
               subcontractors or employees, or (iii) under the circumstances
               presented to the arbitrator, the Commission or other decision
               maker, as the case may be pursuant to the dispute resolution
               process in Section 27, a pattern of conduct is found to exist by
               such arbitrator, the Commission or other decision maker in
               violation of a party's obligations under this Agreement that
               justifies an award of Consequential Damages,(11) nor shall
               anything contained in this section limit the Parties
               indemnification obligations, as specified above.

        19.4   Notwithstanding the provisions of Section 19.3, to the extent
               that U S WEST tariffs contain limitations on liability, Pac-West
               shall submit language for inclusion in its Intrastate retail
               tariffs, that is substantially similar to the limitation of
               liability language contained in U S WEST's tariffs, and such
               limitations of liability shall govern for Customer claims. In
               addition, notwithstanding the provisions of Section

---------

11   Procedural Order, July 14, 1997, page 5-6.

                                       20
<PAGE>

               19.3, to the extent that the Commission's quality of service
               rules provide for remedies to Pac-West or its Customers for
               Customer claims, then those remedies shall govern as to such
               claims(12)

20.     Term of Agreement

        20.1   This Agreement shall be effective upon Commission approval
               through July 30, 2000, and thereafter shall continue in force and
               effect unless and until a new agreement, addressing all of the
               terms of this Agreement, becomes effective between the Parties.
               The Parties shall commence negotiations on a new agreement no
               later than one (1) year prior to the expiration of the term of
               this Agreement. Either Party may request resolution of open
               issues in accordance with the provisions of Section 27 of this
               Part A of this Agreement, Dispute Resolution, beginning nine (9)
               months prior to the expiration of this Agreement. Any disputes
               regarding the terms and conditions of the new interconnection
               agreement shall be resolved in accordance with said Section 27 of
               this Agreement and the resulting agreement shall be submitted to
               the Commission. This Agreement shall remain in effect until a new
               interconnection agreement approved by the Commission has become
               effective.

21.     Governing Law

        21.1   This Agreement shall be governed by and construed in accordance
               with the Act and the FCC's rules and regulations, except insofar
               as state law may control any aspect of this Agreement, in which
               case the domestic laws of the State of Arizona, without regard to
               its conflicts of laws principles, shall govern.

22.     Cancellation Charges

        22.1   Except as provided pursuant to a Bona Fide Request, or as
               otherwise provided in any applicable tariff or contract
               referenced herein, no cancellation charges shall apply.

23.     Regulatory Approvals

        23.1   This Agreement, and any amendment or modification hereof, will be
               submitted to the Commission for approval in accordance with
               Section 252 of the Act In the event any governmental authority or
               agency rejects any provision hereof, the Parties shall negotiate
               promptly and in good faith such revisions as may reasonably be
               required to achieve approval.

        23.2   U S WEST shall provide Pac-West a summary describing the proposed
               change(s) to each Telecommunications Service which is available
               pursuant to this Agreement. U S WEST shall also provide Pac-West
               a summary describing the proposed change(s) of each intrastate
               and interstate tariff which provides for an Interconnection,
               unbundled Network Element or Ancillary Service that is available
               pursuant to this Agreement Such summaries shall be available
               through an internet Web page to be posted on the same day the
               proposed change is filed with the Commission or the FCC or at
               least thirty (30) days in advance of its effective date,
               whichever is earlier.

        23.3   In the event any governmental authority or agency orders U S WEST
               to provide any service covered by this Agreement in accordance
               with any terms or conditions that individually differ

----------

12   Arizona Bench Order, May 29, 1997 Hearing, p. 1610.

                                       21
<PAGE>

               from one or more corresponding terms or conditions of this
               Agreement, Pac-West may elect to amend this Agreement to reflect
               any such differing terms or conditions contained in such decision
               or order, with effect from the date Pac-West makes such election.
               The other services covered by this Agreement and not covered by
               such decision or order shall remain unaffected and shall remain
               in full force and effect.

        23.4   The Parties intend that any additional services requested by
               either Party relating to the subject matter of this Agreement
               will be incorporated into this Agreement by amendment.

24.     Compliance

        24.1   Each Party shall comply with all applicable federal, state, and
               local laws, rules and regulations applicable to its performance
               under this Agreement.

        24.2   Each Party represents and warrants that any equipment, facilities
               or services provided to the other Party under this Agreement
               comply with the Communications Law Enforcement Act of 1994
               ("CALEA"). Each Party (the "Indemnifying Party") shall indemnify
               and hold the other Party (the "Indemnified Party") harmless from
               any and all penalties imposed upon the Indemnified Party for such
               noncompliance and shall, at the Indemnifying Party's sole cost
               and expense, modify or replace any equipment, facilities or
               services provided to the Indemnified Party under this Agreement
               to ensure that such equipment, facilities and services fully
               comply with CALEA.

        24.3   All terms, conditions and operations under this Agreement shall
               be performed in accordance with all applicable laws, regulations
               and judicial or regulatory decisions of all duly constituted
               governmental authorities with appropriate jurisdiction, and this
               Agreement shall be implemented consistent with the FCC
               Interconnection Order and any applicable Commission orders. Each
               Party shall be responsible for obtaining and keeping in effect
               all FCC, Commission, franchise authority and other regulatory
               approvals that may be required in connection with the performance
               of its obligations under this Agreement. In the event the Act or
               FCC or Commission rules and regulations applicable to this
               Agreement are held invalid, this Agreement shall survive, and the
               Parties shall promptly renegotiate any provisions of this
               Agreement which, in the absence of such invalidated Act, rule or
               regulation, are insufficiently clear to be effectuated, violate,
               or are either required or not required by the new rule or
               regulation. During these negotiations, each Party will continue
               to provide the same services and elements to each other as are
               provided for under this Agreement. Provided, however, that either
               Party shall give ten (10) Business Days notice if it intents to
               cease any development of any new element or service that is not
               at that time being provided pursuant to this Agreement. In the
               event the Parties cannot agree on an amendment within thirty (30)
               days from the date any such rules, regulations or orders become
               effective, then the Parties shall resolve their dispute,
               including liability for noncompliance with the new clause or the
               cost, if any, of performing activities no longer required by the
               rule or regulation during the renegotiation of the new clause
               under the applicable procedures set forth in Section 27 herein.

25.     Force Majeure

        25.1   Neither Party shall be liable for any delay or failure in
               performance of any part of this Agreement from any cause beyond
               its control and without its fault or negligence including,
               without limitation, acts of nature, acts of civil or military
               authority, embargoes, epidemics, terrorist acts, riots,
               insurrections, fires, explosions, earthquakes, nuclear accidents,
               floods, work stoppages, equipment failure, power blackouts,
               volcanic action, other major environmental disturbances,
               unusually severe weather conditions, inability to secure

                                       22
<PAGE>

               products or services of other persons or transportation
               facilities or acts or omissions of transportation carriers. No
               delay or other failure to perform shall be excused pursuant to
               this Section 25 unless such delay or failure and the consequences
               thereof are beyond the control and without the fault or
               negligence of the Party claiming excusable delay or other failure
               to perform. In the event of any such excused delay in the
               performance of a Party's obligation(s) under this Agreement, the
               due date for the performance of the original obligation(s) shall
               be extended by a term equal to the time lost by reason of the
               delay. In the event of such delay, the delaying Party shall
               perform its obligations at a performance level no less than that
               which it uses for its own operations. In the event of a labor
               dispute or strike, the Parties agree to provide service to each
               other at a level equivalent to the level they provide themselves.
               In the event of a labor dispute or strike or work stoppage that
               continues for a period in excess of forty-eight (48) hours,
               Pac-West may obtain replacement services for those services
               affected by such labor dispute or strike or work stoppage, in
               which event any liability of Pac-West for the affected services
               shall be suspended for the period of the work stoppage or labor
               dispute or strike. In the event of such performance delay or
               failure by U S WEST, U S WEST agrees to resume performance in a
               nondiscriminatory manner and not favor its own provision of
               Telecommunications Services above that of Pac-West.

26.     Escalation Procedures

        26.1   Pac-West and U S WEST agree to exchange escalation lists which
               reflect contact personnel including vice president-level
               officers. These lists shall include name, department, title,
               phone number, and fax number for each person. Pac-West and U S
               WEST agree to exchange up-to-date lists as reasonably necessary.

27.     Dispute Resolution

        27.1(13) If any claim, controversy or dispute between the Parties, their
                 agents, employees, officers, directors or affiliated agents
                 ("Dispute") cannot be settled through negotiation, it may be
                 resolved by arbitration conducted by a single arbitrator
                 engaged in the practice of law, under the then current rules of
                 the American Arbitration Association ("AAA"). The Federal
                 Arbitration Act, 9 U.S.C. Secs. 1-16, not state law, shall
                 govern the arbitrability of all Disputes. The arbitrator shall
                 not have authority to award punitive damages. All expedited
                 procedures prescribed by the AAA rules shall apply. The
                 arbitrator's award shall be final and binding and may be
                 entered in any court having jurisdiction thereof and shall be
                 noticed to the Commission. The arbitrator shall determine which
                 Party or Parties will bear the costs of arbitration, including
                 apportionment, if appropriate. The arbitration shall occur in
                 Phoenix, Arizona, and the governing law shall be in accordance
                 with Section 21.1 above.

        27.2(14) In the event Pac-West and U S WEST are unable to agree on
                 certain issues during the term of this Agreement, the Parties
                 may identify such issues for arbitration before the Commission.
                 Only those points identified by the Parties for arbitration
                 will be submitted.

        27.3   If a Dispute is submitted to arbitration pursuant to Section 27.1
               above, the procedures described in this Section 27.3 shall apply,
               notwithstanding the then current rules of the AAA.

----------

(13) AT&T Order, p. 33 at Issue 76.
(14) AT&T Order, p. 33 at Issue 76.

                                       23
<PAGE>

               Discovery shall be controlled by the arbitrator and shall be
               permitted to the extent set forth below. Each party may submit in
               writing to a Party, and that Party shall so respond, to an agreed
               amount of the following: interrogatories, demands to produce
               documents, and requests for admission. Not less than ten (10)
               days prior to the arbitration hearing, the Parties shall exchange
               witness and exhibit lists. Deposition discovery shall be
               controlled by the arbitrator. Additional discovery may be
               permitted upon mutual agreement of the Parties or the
               determination of the arbitrator. The arbitration hearing shall be
               commenced within thirty (30) days after a demand for arbitration
               by either Party and shall be held in Phoenix, Arizona. The
               arbitrator shall control the scheduling so as to process the
               matter expeditiously. The Parties may submit written briefs. The
               arbitrator shall rule on the dispute by issuing a written opinion
               within seven (7) days after the close of the hearings. The times
               specified in this section may be extended upon mutual agreement
               of the Parties or by the arbitrator upon a showing of good cause.
               The decision of the arbitrator shall be final and binding upon
               the Parties and judgment upon the award rendered by the
               arbitrator may be entered in a court having jurisdiction. The
               decision shall also be submitted to the Commission.

28.     Nondisclosure

        28.1   All information, including, but not limited to, specifications,
               microfilm, photocopies, magnetic disks, magnetic tapes, drawings,
               sketches, models, samples, tools, technical information, data,
               employee records, maps, financial reports, and market data (a)
               furnished by one Party to the other Party dealing with Customer
               specific, facility specific, or usage specific information, other
               than Customer information communicated for the purpose of
               publication of directory database inclusion, or (b) in written,
               graphic, electromagnetic, or other tangible form and marked at
               the time of delivery as "Confidential" or "Proprietary", or (c)
               declared orally or in writing to the Recipient at the time of
               delivery, or by written notice given to the Recipient within ten
               (10) days after delivery, to be "Confidential" or "Proprietary"
               (collectively referred to as "Proprietary Information"), shall
               remain the property of the Discloser. A Party who receives
               Proprietary Information via an oral communication may request
               written confirmation that the material is Proprietary
               Information. A Party who delivers Proprietary Information via an
               oral communication may request written confirmation that the
               Party receiving the information understands that the material is
               Proprietary Information.

        28.2   Upon request by the Discloser, the Recipient shall return all
               tangible copies of Proprietary Information, whether written,
               graphic or otherwise, except that the Recipient's legal counsel
               may retain one (1) copy for archival purposes.

        28.3   Each Party shall keep all of the other Party's Proprietary
               Information confidential and shall use the other Party's
               Proprietary Information only in connection with this Agreement
               Neither Party shall use the other Party's Proprietary Information
               for any other purpose except upon such terms and conditions as
               may be agreed upon between the Parties in writing.

        28.4   Unless otherwise agreed, the obligations of confidentiality and
               non-use set forth in this Agreement do not apply to such
               Proprietary Information that:

               28.4.1    was, at the time of receipt already known to the
                         Recipient free of any obligation to keep it
                         confidential evidenced by written records prepared
                         prior to delivery by the Discloser, or

               28.4.2    is or becomes publicly known through no wrongful act of
                         the Recipient; or

                                       24
<PAGE>

               28.4.3    is rightfully received from a third person having no
                         direct or indirect secrecy or confidentiality
                         obligation to the Discloser with respect to such
                         information; or

               28.4.4    is independently developed by an employee, agent, or
                         contractor of the Recipient which individual is not
                         involved in any manner with the provision of services
                         pursuant to this Agreement and does not have any direct
                         or indirect access to the Proprietary Information; or

               28.4.5    is approved for release by written authorization of the
                         Discloser or

               28.4.6    is required by law, a court, or governmental agency,
                         provided that the Discloser has been notified of the
                         requirement promptly after the Recipient becomes aware
                         of the requirement, subject to the right of the
                         Discloser to seek a protective order as provided in
                         Section 28.5 below.

        28.5   For a period of ten (10) years from receipt of Proprietary
               Information, the Recipient shall (a) use it only for the purpose
               of performing under this Agreement, (b) hold it in confidence and
               disclose it only to employees, authorized contractors and
               authorized agents who have a need to know it in order to perform
               under this Agreement, and (c) safeguard it from unauthorized use
               or disclosure using no less than the degree of care with which
               the Recipient safeguards its own Proprietary Information. Any
               authorized contractor or agent to whom Proprietary Information is
               provided must have executed a written agreement comparable in
               scope to the terms of this Section. Not withstanding the
               foregoing, each Party shall provide advance notice of three (3)
               Business Days to the other of the intent to provide Proprietary
               information to a governmental authority and the Parties shall
               cooperate with each other in attempting to obtain a suitable
               protective order. The Recipient agrees to comply with any
               protective order that covers the Proprietary Information to be
               disclosed.

        28.6   Each Party agrees that the Discloser would be irreparably injured
               by a breach of this Section 28 by the Recipient or its
               representatives and that the Discloser shall be entitled to seek
               equitable relief, including injunctive relief and specific
               performance, in the event of any breach of this Section 28. Such
               remedies shall not be exclusive but shall be in addition to all
               other remedies available at law or in equity.

        28.7   CPNI related to either Party's subscribers obtained by virtue of
               Local Interconnection or any other service provided under this
               Agreement shall be the Discloser's Proprietary Information and
               may not be used by the Recipient for any purpose except
               performance of its obligations under this Agreement, and in
               connection with such performance, shall be disclosed only to
               employees, authorized contractors and authorized agents with a
               need to know, unless the subscriber expressly directs the
               Discloser to disclose such information to the Recipient pursuant
               to the requirements of Section 222(c)(2) of the Act If the
               Recipient seeks and obtains written approval to use or disclose
               such CPNI from the Discloser, such approval shall be obtained
               only in compliance with Section 222(c)(2) and, in the event such
               authorization is obtained, the Recipient may use or disclose only
               such information as the Discloser provides pursuant to such
               authorization and may not use information that the Recipient has
               otherwise obtained, directly or indirectly, in connection with
               its performance under this Agreement.

        28.8   Except as otherwise expressly provided in this Section 28,
               nothing herein shall be construed as limiting the rights of
               either Party with respect to its subscriber information under any
               applicable law, including, without limitation, Section 222 of the
               Act.

                                       25
<PAGE>

        28.9   Effective Date Of This Section. Notwithstanding any other
               provision of this Agreement, the Proprietary Information
               provisions of this Agreement shall apply to all Proprietary
               Information furnished by either Party with a claim of
               confidentiality or proprietary nature at any time.

29.     Notices

        29.1   Except as otherwise provided herein, all notices or other
               communication hereunder shall be deemed to have been duly given
               when made in writing and delivered in person or deposited in the
               United States mail, certified mail, postage prepaid, return
               receipt requested, or delivered by prepaid overnight express
               mail, and addressed as follows:

               To Pac-West:

               Copy to:

               To U S WEST:          U S WEST

               Copy to:              U S WEST, Communications, Inc
                                     General Counsel, Law Dept.
                                     1801 California, 5100
                                     Englewood, Colorado 80202

        29.2   If personal delivery is selected to give notice, a receipt of
               such delivery shall be obtained. The address to which notices or
               communications may be given to either Party may be changed by
               written notice given by such Party to the other pursuant to this
               Section 29.

30.     Assignment

        30.1   Neither Party may assign, transfer (whether by operation of law
               or otherwise) or delegate this Agreement (or any rights or
               obligations hereunder) to a third party without the prior written
               consent of the other Party, which consent shall not be
               unreasonably withheld, provided that each Party may assign this
               Agreement to an Affiliate or an entity under its common control
               or an entity acquiring all or substantially all of its assets or
               equity by providing prior written notice to the other Party of
               such assignment or transfer. Any attempted assignment or transfer
               that is not permitted under the provisions of this Section 30 is
               void ab initio. Without limiting the generality of the foregoing,
               this Agreement shall be binding upon and shall inure to the
               benefit of the Parties' respective successors and assigns. No
               assignment or delegation hereof shall relieve the assignor of its
               obligations under this Agreement.

        30.2   If any obligation of U S WEST under this Agreement is performed
               by a subcontractor or Affiliate, U S WEST shall remain fully
               responsible for the performance of this Agreement in accordance
               with its terms, and U S WEST shall be solely responsible for
               payments due to its subcontractors.

                                       26
<PAGE>

        30.3   If any obligation of Pac-West under this Agreement is performed
               by a subcontractor or Affiliate, Pac-West shall remain fully
               responsible for the performance of this Agreement in accordance
               with its terms, and Pac-West shall be solely responsible for
               payments due to its subcontractors.

31.     Warranties

        31.1   U S WEST shall conduct all activities and interfaces which are
               provided for under this Agreement with Pac-West Customers in a
               carrier-neutral, nondiscriminatory manner.

        31.2   U S WEST warrants that it has provided, and during the term of
               this Agreement it will continue to provide, to Pac-West true and
               complete copies of all material agreements in effect between U S
               WEST and any third party (including Affiliates) providing any
               services to Pac-West on behalf of or under contract to U S WEST
               in connection with U S WEST's .performance of this Agreement, or
               from whom U S WEST has obtained licenses or other rights used by
               U S WEST to perform its obligations under this Agreement,
               provided, however, that U S WEST may provide such agreements
               under appropriate protective order.

32.     Default

        32.1    In the event of a breach of any material provision of this
                Agreement by either Party, the non-breaching Party shall give
                the breaching Party and the Commission written notice thereof,
                and:

                32.1.1   if such material breach is for non-payment of amounts
                         due hereunder pursuant to this Agreement, the breaching
                         Party shall cure such breach within thirty (30)
                         calendar days of receiving such notice. The
                         non-breaching Party shall be entitled to pursue all
                         available legal and equitable remedies for such breach.
                         Amounts disputed in good faith and withheld or set off
                         shall not be deemed "amounts due hereunder" for the
                         purpose of this provision.

                32.1.2   if such material breach is for any failure to perform
                         in accordance with this Agreement, which, in the sole
                         judgment of the non-breaching Party, adversely affects
                         the non-breaching Party's subscribers, the
                         non-breaching Party shall give notice of the breach and
                         the breaching Party shall cure such breach to the
                         nonbreaching Party's reasonable satisfaction within ten
                         (10) calendar days or within a period of time
                         equivalent to the applicable interval required by this
                         Agreement, whichever is shorter. If the breaching Party
                         does not cure such breach within the applicable time
                         period, the non-breaching Party may, at its sole
                         option, terminate this Agreement, or any parts hereof.
                         The non-breaching Party shall be entitled to pursue all
                         available legal and equitable remedies for such breach.
                         Notice under this Subsection 32.1.2 may be given
                         electronically or by facsimile, provided that a hard
                         copy or original of such notice is sent by overnight
                         delivery service.

                32.1.3   if such material breach is for any other failure to
                         perform in accordance with this Agreement, the
                         breaching Party shall cure such breach to the
                         non-breaching Party's reasonable satisfaction within
                         forty-five (45) calendar days, and, if it does not, the
                         non-breaching Party may, at its sole option, terminate
                         this Agreement, or any parts hereof. The non-breaching
                         Party shall be entitled to pursue all available legal
                         and equitable remedies for such breach.

                                       27
<PAGE>

Part A

        32.2   Pac-West may terminate this Agreement in whole at any time only
               for cause upon sixty (60) calendar days' prior written notice.
               Pac-West's sole liability shall be payment of amounts due for
               services provided or obligations assumed up to the date of
               termination.

        32.3   In the event of any termination under this Section 32, U S WEST
               and Pac-West agree to cooperate to provide for an uninterrupted
               transition of services to Pac-West or another vendor designated
               by Pac-West to the extent that U S WEST has the ability to
               provide such cooperation.

        32.4   Notwithstanding any termination hereof, the Parties shall
               continue to comply with their obligations under the Act.

33.     Remedies

        33.1   In the event U S WEST fails to switch a subscriber to Pac-West
               service as provided in this Agreement, U S WEST shall reimburse
               Pac-West in an amount equal to all  fees paid by such subscriber
               to U S WEST for such failed-to-be-transferred services from the
               time of such failure to switch to the time at which the
               subscriber switch is accomplished. This remedy shall be in
               addition to all other remedies available to Pac-West under this
               Agreement or otherwise available.

        33.2   All rights of termination, cancellation or other remedies
               prescribed in this Agreement, or otherwise available, are
               cumulative and are not intended to be exclusive of other remedies
               to which the injured Party may be entitled at law or equity in
               case of any breach or threatened breach by the other Party of any
               provision of this Agreement. Use of one or more remedies shall
               not bar use of any other remedy for the purpose of enforcing the
               provisions of this Agreement.

34.     Waivers

        34.1   No waiver of any provisions of this Agreement and no consent to
               any default under this Agreement shall be effective unless the
               same shall be in writing and properly executed by or on behalf of
               the Party against whom such waiver or consent is claimed.

        34.2   No course of dealing or failure of either Party to strictly
               enforce any term, right, or condition of this Agreement in any
               instance shall be construed as a general waiver or relinquishment
               of such term, right or condition.

        34.3   Waiver by either Party of any default or breach by the other
               Party shall not be deemed a waiver of any other default or
               breach.

        34.4   By entering into this Agreement, neither Party waives any right
               granted to it pursuant to the Act.

35.     No Third Party Beneficiaries

        35.1   The provisions of this Agreement are for the benefit of the
               Parties hereto and not for any other person; provided, however,
               that this shall not be construed to prevent Pac-West from
               providing its Telecommunications Services to other carriers. This
               Agreement shall not provide any person not a party hereto with
               any remedy, claim, liability, reimbursement, claim of action, or
               other right in excess of those existing without reference hereto.

                                       28
<PAGE>

36.     Physical Security

        36.1   U S WEST shall exercise the same degree of care to prevent harm
               or damage to Pac-West or its employees, agents or subscribers, or
               its property as U S WEST provides itself. Pac-West shall
               exercise the same degree of care to ensure the security of its
               equipment physically collocated within U S WEST's space as
               Pac-West provides such security to itself.

               36.1.1 U S WEST will restrict access to approved personnel to U S
                      WEST's buildings. Pac-West is responsible for the action
                      of its employees and other authorized non Pac-West
                      personnel; U S WEST is responsible for the action of its
                      employees and other authorized non-U S WEST personnel.

               36.1.2 U S WEST will furnish to Pac-West the current name(s) and
                      telephone number(s) of those central office supervisor(s)
                      where a physical collocation arrangement exists. The
                      central office supervisor(s) will be the only U S WEST
                      employee(s) with access to Pac-West collocation space.

               36.1.3 U S WEST will comply at all times with U S WEST security
                      and safety procedures at the individual central office
                      locations where Pac-West has physical collocation
                      arrangements. The Parties will cooperate to analyze
                      security procedures of each company to evaluate ways in
                      which security procedures of US WEST may be enhanced.

               36.1.4 U S WEST will allow Pac-West to inspect or observe its
                      physical spaces which house or contain Pac-West equipment
                      or equipment enclosures at any time upon completion of the
                      physical collocation quotation. Upon completion of the
                      build out of the physical space, U S WEST will furnish
                      Pac-West with all keys, entry codes, lock combinations, or
                      other materials or information which may be needed to gain
                      entry via direct access to Pac-West's physical space.

               36.1.5 U S WEST agrees to logically partition any U S WEST owned
                      access device systems, whether biometric or card reader,
                      or types which are encoded identically or mechanical coded
                      locks on external and or internal doors to spaces which
                      house Pac-West equipment.

               36.1.6 U S WEST agrees to limit the keys used in its keying
                      systems for spaces which contain Pac-West equipment to the
                      U S WEST supervisor for the specific facility to emergency
                      access only. Pac-West shall further have the right to
                      change locks where deemed necessary for the protection and
                      security of its physical spaces and will provide the U S
                      WEST supervisor with the current key.

               36.1.8 U S WEST shall control unauthorized access from passenger
                      and freight elevators, elevator lobbies and spaces which
                      contain or house Pac-West equipment or equipment space in
                      the same manner as U S WEST provides such control for
                      itself

               36.1.9 U S WEST will provide notification to designated Pac-West
                      personnel to indicate an actual or attempted security
                      breach of Pac-West physical space in the same time frame
                      as U S WEST provides such notification to itself.

37. Network Security

        37.1   U S WEST shall provide an appropriate and sufficient back-up and
               recovery plan to be used in the event of a system failure or
               emergency.

                                       29
<PAGE>

        37.2   U S WEST shall install controls to (a) disconnect a user for a
               pre-determined period of inactivity on authorized ports; (b)
               protect subscriber proprietary information; and (c) ensure both
               ongoing operational and update integrity.

        37.3   Each Party shall be responsible for the security arrangements on
               its side of the network to the Point of Interconnection. The
               Parties shall jointly cooperate to analyze network security
               procedures and cooperate to ensure the systems, access and
               devices are appropriately secured and compatible.

38.     Revenue Protection

        38.1   U S WEST shall make available to Pac-West all present and future
               fraud prevention or revenue protection features that U S WEST
               provides to itself or others. These features include, but are not
               limited to, operator screening codes, information digits assigned
               such as information digits '29' and '70' which indicate prison
               and COCOT pay phone originating line types respectively, in
               accordance with the requirements established by the FCC, call
               blocking of domestic, international blocking for business and
               residence, 900, NPA-976, and specific line numbers. U S WEST
               shall additionally provide partitioned access to fraud
               prevention, detection and control functionality within pertinent
               Operations Support Systems ("OSS") which include, but are not
               limited to, Line Information Data Base Fraud monitoring systems.

        38.2   Uncollectible or unbillable revenues resulting from, but not
               confined to, provisioning, maintenance, or signal network routing
               errors shall be the responsibility of the Party causing such
               error.

        38.3   Uncollectible or unbillable revenues resulting from the
               accidental or malicious alteration of software underlying Network
               Elements or their subtending operational support systems by
               unauthorized third parties shall be the responsibility of the
               Party having administrative control of access to said Network
               Element or operational support system software.

        38.4   Each Party shall be responsible for any uncollectible or
               unbillable revenues resulting from the unauthorized use of
               facilities under its control or services it provides, including
               clip-on fraud.

        38.5   The Parties shall work cooperatively to minimize fraud associated
               with third-number billed calls, calling card calls, and any other
               services related to this Agreement.

39.     Law Enforcement Interface

        39.1   U S WEST shall provide all necessary assistance to facilitate the
               execution of wiretap or dialed number recorder orders from law
               enforcement authorities.

40.     Collocation

        40.1   General Description

               40.1.1  Collocation is the right of Pac-West to obtain dedicated
                       space in U S WEST Local Serving Office (LSO) or other U S
                       WEST locations, including, but not limited to, U S WEST
                       serving wire center and tandem offices, as well as all
                       buildings or similar structures owned or leased by U S
                       WEST, whether or not on public rights-of way, that house
                       U S WEST network facilities, including,

                                       30
<PAGE>

                       but not limited to, vaults containing loop concentrators
                       or similar structures, and the right to place equipment
                       in such spaces for the purposes of interconnection with U
                       S WEST's network or access to U S WEST's unbundled
                       Network Elements. Collocation also includes U S WEST
                       providing resources necessary for the operation and
                       economical use of collocated equipment. (15)

        40.1.2         Collocation is offered for network interconnection
                       between the Parties. Pac-West may cross connect to other
                       collocated parties via facilities provided by U S WEST,
                       provided that Pac-West's collocated equipment is also
                       used for interconnection with U S WEST or access to U S
                       WEST's unbundled Network Elements.

        40.1.3         Pac-West is responsible for bringing its own or leased
                       facilities to the U S WEST designated Point of Interface
                       ("POI"). U S WEST will extend Pac-West's facilities from
                       the POI to the cable vault within the wire center. If
                       necessary, U S WEST may bring the facilities into
                       compliance with U S WEST internal fire code standards and
                       extend the facilities to the collocated space.

        40.1.4         Pac-West will be provided two (2) points of entry into
                       the U S WEST wire, center only when there are at least
                       two (2) existing entry points for U S WEST cable and when
                       there are vacant entrance ducts in both.

        40.1.5         Pac-West may collocate transmission equipment (including
                       Digital Cross Connect Systems and Remote Switching Units
                       (RSU)) to terminate basic transmission facilities.
                       Pac-West may not collocate equipment used to provide
                       enhanced services. Pac-West must identify what equipment
                       will be installed, to allow for U S WEST to use this
                       information in engineering the power, floor loading, heat
                       release, environmental participant level, and HVAC.
                       Pac-West shall not use RSUs to enable the bypassing of
                       switched access charges. U S WEST will be permitted to
                       audit Pac-West's reporting of local and toll calls. At
                       Pac-West's expense, Pac-West's will be required to block
                       the ability of RSUs to bypass switched access charges, if
                       it becomes feasible to do so. (16)

        40.1.6         Pac-West may collocate the amount and type of equipment
                       it deems necessary in its collocated space in accordance
                       with FCC rules and regulations.(17)

        40.1.7         Expanded Interconnection Channel Termination (EICT).
                       Telecommunications interconnection between Pac-West's
                       collocated equipment and U S WEST's network may be
                       accomplished via an Expanded Interconnection Channel
                       Termination (EICT). This element can be at the DS-3,
                       DS-1, DS-0, or any other technically feasible level,
                       subject to network disclosure requirements of the FCC,
                       depending on the U S WEST service to which it is
                       connected. The terms and conditions of the tariff for
                       EICT are incorporated only to the extent that they are
                       agreed to by the Parties. Within ninety (90) days (or
                       other acceptable time agreed to by the Parties) of the
                       Effective Date of this Agreement, the Parties will meet
                       to review the tariff and seek resolution on disagreed
                       items.

----------

15      MCIm Order, p. 19 at Issue 31 and AT&T Order Issue 10.
16      MCIm Order, p. 20 at Issue 32 and AT&T Order Issue 9.
17      MCIm Order, p. 20 at Issue 32 and AT&T Order Issue 9.

                                       31
<PAGE>

               40.1.8  Consistent with U S WEST's internal practice, within ten
                       (10) Business Days of Pac-West's request for any space,
                       U S WEST shall provide information available to it
                       regarding the environmental conditions of the space
                       provided for placement of equipment and interconnection,
                       including, but not limited to, the existence and
                       condition of asbestos, lead paint, hazardous substance
                       contamination, or radon. Information is considered
                       "available" under this Agreement if it is in U S WEST's
                       possession or files, or the possession of an agent,
                       contractor, employee, lessor, or tenant of U S WEST's
                       that holds such information on U S WEST's behalf.

               40.1.9  U S WEST shall allow Pac-West to perform any
                       environmental site investigations, including, but not
                       limited to, asbestos surveys, which Pac-West deems to be
                       necessary in support of its collocation needs. Pac-West
                       shall advise U S WEST in writing of its intent to conduct
                       such investigation, and shall receive written approval
                       from U S WEST to proceed. Pac-West shall indemnify U S
                       WEST according to Section 18 of Part A of this Agreement
                       for any loss or claim for damage suffered by U S WEST as
                       a result of Pac-West's actions during any site
                       inspection.

               40.1.10 If the space provided for the placement of equipment,
                       Interconnection, or provision of service contains
                       environmental contamination or hazardous material,
                       particularly, but not limited to, asbestos, lead paint or
                       radon, which makes the placement of such equipment or
                       interconnection hazardous, U S WEST shall offer an
                       alternative space, if available, for Pac-West's
                       consideration.

        40.2   Virtual Collocation

               40.2.1  U S WEST shall provide virtual collocation for the
                       purpose of Interconnection or access to unbundled Network
                       Elements subject to the rates, terms and conditions of
                       this Agreement.

               40.2.2  Upon mutual agreement, Pac-West will have physical access
                       to the U S WEST wire center building pursuant to a
                       virtual collocation arrangement.

               40.2.3  Pac-West will be responsible for obtaining and providing
                       to U S WEST administrative codes, e.g., common language
                       codes, for ail equipment specified by Pac-West and
                       installed in wire center buildings.

               40.2.4  Pac-West will be responsible for payment of training of
                       U S WEST employees for the maintenance, operation and
                       installation of Pac-West's virtually collocated equipment
                       when that equipment is different than the equipment used
                       by U S WEST. Training conditions are further described in
                       the Virtual Collocation Rate Element section following.

               40.2.5  Pac-West will be responsible for payment of reasonable
                       charges incurred as a result of agreed upon maintenance
                       and/or repair of Pac-West's virtually collocated
                       equipment.

               40.2.6  U S WEST does not guarantee the reliability of Pac-West's
                       virtually collocated equipment, but U S WEST is
                       responsible for proper installation, maintenance and
                       repair of such equipment, including the change out of
                       electronic cards provided by Pac-West

               40.2.7  Pac-West is responsible for ensuring the functionality
                       and interoperability of virtually collocated SONET
                       equipment provided by different manufacturers.

                                       32
<PAGE>

               40.2.8  Pac-West, as bailor, will transfer possession of
                       Pac-West's virtually collocated equipment to U S WEST, as
                       bailee, for the sole purpose of providing U S WEST with
                       the ability to install, maintain and repair Pac-West's
                       virtually collocated equipment. Title to the Pac-West
                       virtually collocated equipment shall not pass to U S
                       WEST.

               40.2.9  Pac-West shall ensure that upon receipt by U S WEST of
                       Pac-West's virtually collocated equipment, Pac-West will
                       make available all access to ongoing technical support to
                       U S WEST, as available under the equipment warranty or
                       other terms and conditions, all at Pac-West's expense.
                       Pac-West shall advise the manufacturer and seller of the
                       virtually collocated equipment that it will be installed,
                       maintained and repaired by U S WEST.

               40.2.10 Pac-West's virtually collocated equipment must comply
                       with the Bellcore Network Equipment Building System
                       (NEBS) Generic Equipment Requirements TR-NWT000063,
                       electromagnetic compatibility (EMC) per GR-1089-CORE,
                       Company wire center environmental and transmission
                       standards and any statutory (local, state or federal)
                       and/or regulatory requirements, all of the foregoing
                       which may be in effect at the time of equipment
                       installation or which may subsequently become effective.
                       Pac-West shall provide U S WEST interface specifications
                       (e.g., electrical, functional, physical and software) of
                       Pac-West's virtually collocated equipment.

               40.2.11 Pac-West must specify all software options and associated
                       plug-ins for its virtually collocated equipment.

               40.2.12 Pac-West is responsible for purchasing and maintaining a
                       supply of spares. Upon failure of the Pac-West virtually
                       collocated equipment, Pac-West is responsible for
                       transportation and delivery of maintenance spares to U S
                       WEST at the wire center housing the failed equipment.

               40.2.13 Where Pac-West is virtually collocated in a premises
                       which was initially prepared for virtual collocation,
                       Pac-West may elect to retain its virtual collocation in
                       that premises and expand that virtual collocation
                       according to the rates, terms and conditions of this
                       Agreement.

        40.3   Physical Collocation

               40.3.1   U S WEST shall provide to Pac-West physical collocation
                        of equipment necessary for Interconnection or for access
                        to unbundled Network Elements, except that U S WEST
                        shall provide for virtual collocation where space is
                        available or expansion or rearrangement is possible if U
                        S WEST demonstrates to the Commission that physical
                        collocation is not practical for technical reasons or
                        because of space limitations, as provided in Section
                        251(c)(6) of the Act. Pac-West shall pay a prorated
                        amount for expansion of said space. U S WEST shall
                        provide such collocation for the purpose of
                        Interconnection or access to unbundled Network Elements,
                        except as otherwise mutually agreed to in writing by the
                        Parties or as required by the FCC or the Commission,
                        subject to the rates, terms and conditions of this
                        Agreement.

               40.3.1.1 U S WEST shall permit Pac-West to use vendors for all
                        required engineering and installation services
                        associated with its collocated equipment which are being
                        collocated by Pac-West pursuant to this Agreement Within
                        one hundred and twenty (120) days after the Effective
                        Date of this Agreement,

                                       33
<PAGE>

                        U S WEST and Pac-West shall compose and agree on a list
                        of approved vendors and/or agree on minimum
                        qualifications for such contractors consistent with
                        industry standards, such agreement not to be
                        unreasonably withheld. In the event such agreement
                        cannot be reached and the dispute resolution process
                        outlined in Section 27 above has not concluded on the
                        issue of approved vendors, the list of approved vendors
                        maintained by U S WEST as of the Effective Date of this
                        Agreement shall be the default list until the conclusion
                        of the dispute resolution process.(18)

               40.3.2   Where Pac-West is virtually collocated in a premises
                        which was initially prepared for virtual collocation,
                        Pac-West may elect, unless it is not practical for
                        technical reasons or because of space limitations, to
                        convert its virtual collocation to physical collocation
                        at such premises in which case Pac-West shall coordinate
                        the construction and rearrangement with U S WEST of its
                        equipment (IDLC and transmission) and circuits for which
                        Pac-West shall pay U S WEST at applicable rates, and
                        pursuant to the other terms and conditions in this
                        Agreement. In addition, all applicable physical
                        collocation recurring charges shall apply.

               40.3.3   Pac-West will be allowed access to the POI on
                        non-discriminatory terms. Pac-West owns and is
                        responsible for the installation, maintenance and repair
                        of its equipment located within the space rented from U
                        S WEST.

               40.3.4   Pac-West must use ]eased space as soon as reasonably
                        possible and may not warehouse space for later use or
                        sublease to another provider. Physical collocation is
                        offered on a space-available, first-come, first-served
                        basis.

               40.3.5   The minimum standard leasable amount of floor space is
                        one hundred (100) square feet. Pac-West must efficiently
                        use the leased space and no more than fifty percent
                        (50%) of the floor space may be used for storage
                        cabinets and work surfaces. Pac-West and U S WEST may
                        negotiate other storage arrangements on a case-by-case
                        basis.(19) Pac-West may store spares within its
                        collocated space.

               40.3.6    Pac-West's leased floor space will be separated from
                         other competitive providers and U S WEST space through
                         cages or hard walls. Pac-West may elect to have U S
                         WEST construct the cage, or choose from U S WEST
                         approved contractors to construct the cage, meeting U S
                         WEST's installation Technical Publication 77350. Any
                         deviation to Pac-West's request must be approved.

               40.3.7    The following standard features will be provided by U S
                         WEST:

                         (a) Heating, ventilation and air conditioning.

                         (b) Smoke/fire detection and any other building code
                             requirement.

               40.3.8    U S WEST Responsibilities

                         (a)  Design the floor space within each location which
                              will constitute Pac-West's leased space.

----------

(18)    AT&T Order, p. 8 at Issue 9c.
(19)    AT&T Order, p. 10 at Issue I 0(a).

                                       34
<PAGE>

                         (b)  Ensure that the necessary construction work is
                              performed on a timely basis to build Pac-West's
                              leased physical space and the riser from the vault
                              to the leased physical space.

                         (c)  Develop a quotation specific to Pac-West's
                              request.

                         (d)  Extend U S WEST-provided and owned fiber optic,
                              copper or coaxial(20) cable, whichever is more
                              efficient, from the Poi through the cable vault
                              and extend the cable to Pac-West's leased physical
                              space or place the cable in fire retardant tubing
                              prior to extension to Pac-West's leased physical
                              space.

                         (e)  Installation and maintenance and all related
                              activity necessary to provide Channel Termination
                              between U S WEST's and Pac-West's equipment.

                         (f)  Work cooperatively with Pac-West in matters of
                              joint testing and maintenance.

          40.3.9    Pac-West Responsibilities

                         (a)  Determine the type of enclosure for the physical
                              space.

                         (b)  Procure, install and maintain fiber optic, copper
                              or coaxial(21) 121 facilities up to the U S WEST
                              designated Poi.

                         (c)  Provide for installation, maintenance, repair and
                              service of all Pac-West's equipment located in the
                              leased physical space.

                         (d)  Ensure that all equipment installed by Pac-West
                              complies with Bellcore Network Equipment Building
                              System Generic Equipment requirements, U S WEST
                              environmental and transmission standards, and any
                              statutory (local, federal, or state) or regulatory
                              requirements in effect at the time of equipment
                              installation or that subsequently become
                              effective.

               40.3.10   The installation of any Interconnection service will be
                         coordinated between the Parties so that Pac-West may
                         utilize those services once Pac-West has accepted its
                         leased physical space.

               40.3.11   If, at any time, U S WEST reasonably determines that
                         the equipment or the installation does not meet
                         standard industry requirements, such failure being due
                         to actions of Pac-West or its agents, Pac-West will be
                         responsible for the costs associated with the removal,
                         modification to, or installation of the equipment to
                         bring it into compliance. If Pac-West fails to correct
                         any non-compliance within thirty (30) calendar days or
                         as soon as reasonably practical after the receipt of
                         written notice of non-compliance, U S WEST may have the
                         equipment removed or the condition corrected at
                         Pac-West's expense.

               40.3.12   If, during installation, U S WEST reasonably determines
                         that Pac-West activities or equipment are unsafe,
                         non-industry standard or in violation of any applicable

----------

20      AT&T Order, p. 10, Issue 1 0(a).
21      AT&T Order, p. 10, Issue 10(a)

                                       35
<PAGE>

                        laws or regulations, U S WEST has the right to stop work
                        until the situation is remedied. If such conditions pose
                        an immediate threat to the safety of personnel,
                        interfere with the performance of U S WEST's service
                        obligations, or pose an immediate threat to the physical
                        integrity of the conduit system or the cable facilities,
                        U S WEST may perform such work and/or take action as is
                        necessary to correct the condition at Pac-West' s
                        expense.

               40.3.13  U S WEST shall provide basic telephone service with a
                        connection jack as requested by Pac-West from U S WEST
                        for the collocated space. Upon Pac-West's request and
                        following the normal provisioning process, this service
                        shall be available at the Pac-West collocated space on
                        the day the space is turned over to Pac-West by U S
                        WEST.

               40.3.14  Where available, U S WEST shall provide access to
                        eyewash stations, bathrooms, and drinking water within
                        the collocated facility on a twenty-four (24) hour per
                        day, seven (7) day per week basis for Pac-West personnel
                        and its designated agents.

               40.3.15  U S WEST shall provide Pac-West with written notice five
                        (5) Business Days prior to those instances where U S
                        WEST or its subcontractors may be performing work that
                        could reasonably potentially affect Pac-West's service.
                        U S WEST will make reasonable efforts to inform Pac-West
                        by telephone of any emergency related activity prior to
                        the start of the activity that U S WEST or its
                        subcontractors may be performing that could reasonably
                        potentially affect Pac-West's service, so that Pac-West
                        can take any action required to monitor or protect its
                        service.

               40.3.16  U S WEST shall provide information regarding the
                        location, type, and cable termination requirements
                        (i.e., connector type, number and type of pairs, and
                        naming convention) for U S WEST point of termination to
                        Pac-West within five (5) Business Days of Pac-West's
                        acceptance of U S WEST's quote for collocated space.

               40.3.17  U S WEST shall provide the dimensions for Pac-West
                        outside plant fiber ingress and egress into Pac-West
                        collocated space within five (5) Business Days of
                        Pac-West's acceptance of U S WEST's quote for collocated
                        space.

               40.3.18  U S WEST shall provide the sizes and number of power
                        feeders for the collocated space to Pac-West within ten
                        (10) Business Days of Pac-West's acceptance of U S
                        WEST's quote for collocated space.

               40.3.19  U S WEST shall provide positive confirmation to Pac-West
                        when construction of Pac-West collocated space is fifty
                        percent (50%) completed. This confirmation shall also
                        include confirmation of the scheduled completion and
                        turnover dates.

               40.3.20  [intentionally left blank for numbering consistency]

               40.3.21  With the exception of Subparagraph (b) below, U S WEST
                        shall provide the following information to Pac-West
                        within five (5) Business Days or as reasonably necessary
                        upon receipt of a written request from Pac-West:

                        (a)   additional work restriction guidelines.

                        (b)   U S WEST or industry technical publication
                              guidelines that impact the design of U S WEST
                              collocated equipment, unless such documents are

                                       36
<PAGE>

                         already in the possession of Pac-West. The following U
                         S WEST Technical Publications provide information
                         regarding central office equipment and collocation
                         guidelines:

                         77350  Central Office Telecommunications Equipment
                                Installation and Removal Guidelines
                         77351  Central Office Telecommunications Equipment
                                Engineering Standards
                         77355  Grounding - Central Office and Remote Equipment
                                Environment
                         77386  Expanded Interconnection and Collocation for
                                Private Line Transport and Switched Access
                                Services

                         Pac-West may obtain the above documents from:

                              Faison Office Products Company
                              3251 Revere St., Suite 200
                              Aurora, Colorado 80011
                              (303) 340-3672

                        (c)   appropriate U S WEST contacts (names and telephone
                              numbers) for the following areas:

                              Engineering
                              Physical & Logical Security
                              Provisioning
                              Billing
                              Operations
                              Site and Building Managers
                              Environmental and Safety

                        (d)   escalation process for the U S WEST employees
                              (names, telephone numbers and the escalation
                              order) for any disputes or problems that might
                              arise pursuant to Pac-West's collocation.

               40.3.22  Power as referenced in this Agreement refers to any
                        electrical power source supplied by U S WEST for
                        Pac-West equipment. U S WEST will supply power to
                        support Pac-West equipment at equipment specific DC and
                        AC voltages. At a minimum, U S WEST shall supply power
                        to Pac-West at parity with that provided by U S WEST to
                        itself. If U S WEST performance, availability or
                        restoration falls below industry standards, U S WEST
                        shall bring itself into compliance with such industry
                        standards as soon as technologically feasible.

                        (a)   Central office power supplied by U S WEST into the
                              Pac-West equipment area, shall be supplied in the
                              form of power feeders (cables) on cable racking
                              into the designated Pac-West equipment area. The
                              power feeders (cables) shall efficiently and
                              economically support the requested quantity and
                              capacity of Pac-West equipment The termination
                              location shall be mutually agreed upon by the
                              Pates.

                        (b)   U S WEST power equipment supporting Pac-West's
                              equipment shall:

                              i.     comply with applicable industry standards
                                     (e.g., Bellcore, NEBS, IEEE, UL, and NEC)
                                     or manufacturer's equipment power

                                       37
<PAGE>

                                     requirement specifications for equipment
                                     installation, cabling practices, and
                                     physical equipment layout;

                              ii.    have redundant power feeds with physical
                                     diversity and battery back-up as required
                                     by the equipment manufacturer's
                                     specifications for Pac-West equipment, or,
                                     at minimum, at parity with that provided
                                     for similar U S WEST equipment at that
                                     location;

                              iii.   provide central office ground, connected to
                                     a ground electrode located within the
                                     Pac-West collocated space, at a level above
                                     the top of Pac-West equipment plus or minus
                                     two (2) feet to the left or right of
                                     Pac-West's final request;

                              iv.    provide an installation sequence and access
                                     that will allow installation efforts in
                                     parallel without jeopardizing personnel
                                     safety or existing services of either
                                     Party;

                              v.     provide cabling that adheres to Bell
                                     Communication Research (Bellcore) Network
                                     Equipment-Building System (NEBS) standards
                                     TR-EOP-000063;

                              vi.    provide Lock Out-Tag Out and other
                                     electrical safety procedures and devices in
                                     conformance with the most stringent of OSHA
                                     or industry guidelines; and

                              vii.   ensure that installed equipment meets
                                     Bellcore specifications.

40.4    Collocation Rate Elements

        40.4.1 Common Rate Elements

               The following rate elements are common to both virtual and
               physical collocation:

               (a)    Quote Preparation Fee. This covers the work involved in
                      developing a quotation for Pac-West for the total costs
                      involved in its collocation request

               (b)    Entrance Facility. Provides for fiber optic cable on a per
                      two (2) fiber increment basis from the point of
                      interconnection utilizing U S WEST owned, conventional
                      single mode type of fiber optic cable to the collocated
                      equipment (for virtual collocation) or to the leased space
                      (for physical collocation). Entrance facility includes
                      riser, fiber placement, entrance closure,
                      conduit/innerduct, and core drilling.

               (c)    Cable Splicing. Represents the labor and equipment to
                      perform a subsequent splice to the Pac-West provided fiber
                      optic cable after the initial installation splice.
                      Includes a per-setup and a per-fiber-spliced rate
                      elements.

               (d)    48 Volt Power. Provides 48 volt power to the Pac-West
                      collocated equipment. Charged on a per ampere basis.

               (e)    48 Volt Power Cable. Provides for the transmission of -48
                      Volt DC power to the collocated equipment. It includes
                      engineering, furnishing and installing the main
                      distribution bay power breaker, associated power cable,

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                      cable rack and local power bay to the closest power
                      distribution bay. It also includes the power cable
                      (feeders) A and B from the local power distribution bay to
                      the leased physical space (for physical collocation) or to
                      the collocated equipment (for virtual collocation).

               (f)    Inspector Labor. Provides for the U S WEST qualified
                      personnel necessary when Pac-West requires access to the
                      POI after the initial installation or access to its
                      physical collocation floor space, where an escort is
                      required. A call-out of an inspector after business hours
                      is subject to a minimum charge of four (4) hours.
                      Maintenance Labor, Inspector Labor, Engineering Labor and
                      Equipment Labor business hours are considered to be Monday
                      through Friday, 8:00 am to 5:00 pm and after business
                      hours are after 5:00 pm and before 8:00 am, Monday through
                      Friday, all day Saturday, Sunday and holidays.

               (g)    Expanded Interconnection Channel Regeneration. Required
                      when the distance from the leased physical space (for
                      physical collocation) or from the collocated equipment
                      (for virtual collocation) to the U S WEST network is of
                      sufficient length to require regeneration.

               (h)    U S WEST will provide external synchronization when
                      available.

               (i)    U S WEST will provide 20 hertz ringing supply when
                      available.

        40.4.2 Physical Collocation Rate Elements

               The following rate elements apply only to physical collocation
               arrangements:

               (a)    Enclosure Buildout. The Enclosure Buildout element, either
                      Cage or Hardwall, includes the material and labor to
                      construct the enclosure specified by Pac-West or Pac-West
                      may choose from U S WEST approved contractors to construct
                      the cage, meeting U S WEST's installation Technical
                      Publication 77350. It includes the enclosure (cage or
                      hardwall), air conditioning (to support Pac-West loads
                      specified), lighting (not to exceed 2 wafts per square
                      foot), and convenience outlets (3 per cage or the number
                      required by building code for the hardwall enclosure).
                      Also provides for humidification, if required. Pricing for
                      Enclosure Buildout will be provided on an individual basis
                      due to the uniqueness of Pac-West's requirements, central
                      office structure and arrangements.

               (b)    Floor Space Rental. This element provides for the rental
                      of the floor space provided to Pac-West pursuant to a
                      physical collocation arrangement.

        40.4.3 Virtual Collocation Rate Elements

               The following rate elements apply only to virtual collocation
               arrangements:

               (a)    Main tenance Labor. Provides for the labor necessary for
                      repair of out of service and/or service-affecting
                      conditions and preventative maintenance of the Pac-West
                      virtually collocated equipment. Pac-West is responsible
                      for ordering maintenance spares. U S WEST will perform
                      maintenance and/or repair work upon receipt of the
                      replacement maintenance spare and/or equipment for
                      Pac-West. A call-out of a maintenance technician after
                      business hours is subject to a minimum charge of four (4)
                      hours.

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<PAGE>

                      Maintenance Labor, Inspector Labor, Engineering Labor and
                      Equipment Labor business hours are considered to be Monday
                      through Friday, 8:00 am to 5:00 pm and after business
                      hours are after 5:00 pm and before 8:00 am, Monday through
                      Friday, all day Saturday, Sunday and holidays.

              (b)     Training Labor. Provides for the billing of
                      vendor-provided training for U S WEST personnel on a
                      metropolitan service area basis, necessary for Pac-West
                      virtually collocated equipment which is different from
                      equipment used by U S WEST. U S WEST will require three
                      (3) U S WEST employees to be trained per metropolitan
                      service area in which the Pac-West virtually collocated
                      equipment is located. If, by an act of U S WEST, trained
                      employees are relocated, retired, or are no longer
                      available, U S WEST will not require Pac-West to provide
                      training for additional U S WEST employees for the same
                      virtually collocated equipment in the same metropolitan
                      area. Fifty percent (50%) of the amount of training billed
                      to Pac-West will be refunded to Pac-West, should a second
                      collocator or U S WEST in the same metropolitan area
                      select the same virtually collocated equipment as
                      Pac-West. The second collocator or U S WEST will be
                      charged one half of the original amount paid by Pac-West
                      for the same metropolitan area.

              (c)     Equipment Bay. Provides mounting space for the Pac-West
                      virtually collocated equipment. Each bay includes the
                      seven (7) foot bay, its installation, and all necessary
                      environmental supports. Mounting space on the bay,
                      including space for the fuse panel and air gaps necessary
                      for heat dissipation is limited to 78 inches. The monthly
                      rate is applied per shelf.

              (d)     Engineering Labor. Provides the planning and engineering
                      of the Pac-West virtually collocated equipment at the time
                      of installation, change or removal.

              (e)     Installation Labor. Provides for the installation, change
                      or removal of the Pac-West virtually collocated equipment.

        40.5.  Collocation Installation Intervals

               40.5.1 U S WEST shall have a period of thirty (30) calendar days
                      after receipt by Pac-West of a Request for Collocation to
                      provide Pac-West with a written quotation containing all
                      nonrecurring charges and fees for the requested
                      collocation (the "Quotation Preparation Period"). Pac-West
                      shall make payment of fifty percent (50%) of the
                      nonrecurring charges and fees upon acceptance of the
                      quotation ("Initial Payment") with the remainder due upon
                      completion of the construction. In the event Pac-West
                      disputes the amount of U S WEST's proposed nonrecurring
                      charges and fees, Pac-West shall deposit fifty percent
                      (50%) of the nonrecurring charges and fees into an
                      interest bearing escrow account prior to the commencement
                      of construction ("Initial Deposit"). The remainder of the
                      nonrecurring charges and fees shall be deposited into the
                      escrow account upon completion of the construction. Upon
                      resolution of the dispute, the escrow agent shall
                      distribute amounts in the account in accordance with the
                      resolution of such dispute and any interest that has
                      accrued with respect to amounts in the account shall be
                      distributed proportionately to the Parties. U S WEST shall
                      complete installation pursuant to the Pac-West Request for
                      Collocation within a maximum of three (3) months after the
                      Initial Payment or Initial Deposit for physical or virtual
                      collocation. If there is a dispute between U S WEST and
                      Pac-West regarding the amount of any nonrecurring charges
                      and fees, such dispute shall be resolved in accordance
                      with Section 27 above. The pendency of

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<PAGE>

                      any such dispute shall not affect the obligation of U S
                      WEST to complete collocation within the installation
                      intervals described above.

41.     Technical References - Collocation

        Subject to Sections 1.3.1 and 1.3.2 of this Part A of this Agreement, U
S WEST shall provide collocation in accordance with the following standards:

        41.1   Institute of Electrical and Electronics Engineers (IEEE) Standard
               383, IEEE Standard for Type Test of Class 1 E Electric  Cables,
               Field Splices,  and  Connections  for Nuclear Power Generating
               Stations;

        41.2   National Electrical Code (NEC), use most recent issue;

        41.3   TA-NPL-000286, NEBS Generic Engineering Requirements for System
               Assembly and Cable Distribution, Issue 2 (Bellcore, January
               1989);

        41.4   TR-EOP-000063 Network Equipment-Building System (NEBS) Generic
               Equipment Requirements, Issue 3, March 1988;

        41.5   TR-EOP-000151, Generic Requirements for 24-, 48-, 130-, and 140-
               Volt Central Office Power Plant Rectifiers, Issue 1 (Bellcore,
               May 1985);

        41.6   TR-EOP-000232, Generic Requirements for Lead-Acid Storage
               Batteries, Issue 1 (Bellcore, June 1985);

        41.7   TR-NWT-000154, Generic Requirements for 24-, 48-, 130, and 140-
               Volt Central Office Power Plant Control and Distribution
               Equipment, Issue 2 (Bellcore, January 1992);

        41.8   TR-NWT-000295, Isolated Ground Planes: Definition and
               Application to Telephone Central Offices, Issue 2 (Bellcore, July
               1992);

        41.9   TR-NWT-000840, Supplier Support Generic Requirements (SSGR), (A
               Module of LSSGR, FR-NWT-000064), Issue 1 (Bellcore, December
               1991);

        41.10  TR-NWT-001275 Central Office Environment Installations/Removal
               Generic Requirements, Issue 1, January 1993; and

        41.11  Underwriters' Laboratories Standard, UL 94.

42.     Number Portability

        42.1   Interim Number Portability (INP)

               42.1.1 General Terms

                       (a)    The Parties shall provide Interim Number
                              Portability (INP) on a reciprocal basis to the
                              extent technically feasible.

                       (b)    Until permanent number portability is implemented
                              by the industry pursuant to regulations issued by
                              the FCC or the Commission, the Parties agree to
                              provide INP to each other through Remote Call
                              Forwarding, Direct Inward Dialing, or other
                              appropriate means as agreed to by the Parties.

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<PAGE>

                      (c)     Once permanent number portability is implemented
                              pursuant to FCC or Commission regulation, either
                              Party may withdraw, at any time and at its sole
                              discretion, its INP offerings, subject to advance
                              notice to the other Party with sufficient time to
                              allow for coordination to allow the seamless and
                              transparent conversion of INP Customer numbers to
                              permanent number portability. Upon implementation
                              of permanent number portability pursuant to FCC
                              regulations, both Parties agree to conform and
                              provide such permanent number portability. The
                              Parties agree to expeditiously convert Customers
                              from interim number portability to permanent
                              number portability, provided that the interim
                              service is not removed until the Customer has been
                              converted.

                       (d)    U S WEST will update and maintain its Line
                              Information Database ("LIDB") listings for numbers
                              retained by Pac-West and its Customer, and
                              restrict or cancel calling cards associated with
                              these forwarded numbers as directed by Pac-West.
                              Further, U S WEST will not block third party and
                              collect calls to those numbers unless requested by
                              Pac-West.

                      (e)     The ordering Party shall specify, on a per
                              telephone number basis, which method of INP is to
                              be employed and the providing Party shall provide
                              such method to the extent technically feasible.

                       (f)    Where either Party has activated an entire NXX, or
                              activated a substantial portion of an NXX with the
                              remaining numbers in that NXX either reserved for
                              future use or otherwise unused, if these
                              Customer(s) choose to receive service from the
                              other Party, the first Party shall cooperate with
                              the second Party to have the entire NXX reassigned
                              in the LERG (and associated industry databases,
                              routing tables, etc.) to an End Office operated by
                              the second Party. Such transfer will be
                              accomplished with appropriate coordination between
                              the Parties and subject to appropriate industry
                              lead times for movement of NXXs from one switch to
                              another.

               42.1.2 Description Of Service

                      (a)     Interim Number Portability Service ( "INP") is a
                              service arrangement that can be provided by U S
                              WEST to Pac-West or by Pac-West to U S WEST.

                      (b)     INP applies to those situations where an end-user
                              Customer elects to change service providers, and
                              such Customer also wishes to retain its existing
                              or reserved telephone number(s). INP consists of
                              providing the capability to route calls placed to
                              telephone numbers assigned to one Party's switches
                              to another Party's switches.

                      (c)     INP is available as INP-Remote Call Forwarding
                              ("INP-RCF") permitting a call to a U S WEST
                              assigned telephone number to be translated to Pac-
                              West's dialable local number. Pac-West may
                              terminate the call as desired. Additional capacity
                              for simultaneous call forwarding is available
                              where technically feasible on a per path basis.
                              Pac-West will need to specify the number of
                              simultaneous calls to be forwarded for each number
                              ported.

                      (d)     DID is another INP method that makes use of direct
                              inward dialing trunks. Each DID trunk group used
                              for INP is dedicated to carrying DID INP traffic
                              between the U S WEST end office and the Pac-West
                              switch. Traffic on

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<PAGE>

                              these trunks cannot overflow to other trunks, so
                              the number of trunks shall be conservatively
                              engineered by U S WEST. Also, inter-switch
                              signaling is usually limited to multi-frequency
                              (MF) This precludes passing Calling Line I D to
                              the Pac-West switch.

                      (e)     RI-PH will route a dialed call to the U S WEST
                              switch associated with the NXX of the dialed
                              number. The U S WEST switch shall then insert a
                              prefix onto the dialed number which identifies how
                              the call is to be routed to Pac-West. The prefixed
                              dialed number is transmitted to the U S WEST
                              tandem switch to which Pac-West is connected.
                              Route indexing is only available with seven (7)
                              digit local dialing.

                              The prefix is removed by the operation of the
                              tandem switch and the dialed number is routed to
                              Pac-West's switch so the routing of the call can
                              be completed by Pac-West.

                              i.     DN-RI is a form of RI-PH that requires
                                     direct trunking between the U S WEST switch
                                     to which the ported number was originally
                                     assigned and the Pac-West switch to which
                                     the number has been ported. The U S WEST
                                     switch shall send the originally dialed
                                     number to the Pac-West switch without a
                                     prefix.

                              ii.    U S WEST shall provide RI-PH or DN-RI on an
                                     individual telephone number basis, as
                                     designated by Pac-West. Where technically
                                     feasible, calls to ported numbers are first
                                     directed to the Pac-West switch over direct
                                     trunks but may overflow to tandem trunks if
                                     all trunks in the direct group are
                                     occupied.

                              iii.   For both RI-PH and DN-RI the trunks used
                                     may, at Pac-West's option, be the same as
                                     those used for exchange of other local
                                     traffic with U S WEST. At Pac-West' s
                                     option, the trunks shall employ SS7 or in
                                     band signaling and may be one way or two
                                     way.

                      (g)     INP is subject to the following restrictions:

                              i.     An INP telephone number may be assigned by
                                     Pac-West only to Pac-West's Customers
                                     located within U S WEST's local calling
                                     area and toll rating area that is
                                     associated with the NXX of the ported
                                     number. This is to prevent the possibility
                                     of Customers using number portability to
                                     extend the local calling area.

                              ii.    INP is applicable only if Pac-West is
                                     engaged in a reciprocal traffic exchange
                                     arrangement with U S WEST.

                              iii.   INP is not offered for NXX Codes 555, 976,
                                     960 and 1+ sent-paid telephones, and
                                     Service Access Codes (i.e., 500, 700,
                                     800/888, 900). INP is not available for FGA
                                     seven-digit numbers (including foreign
                                     exchange (FEX), FX and FX/ONAL and foreign
                                     Central Office service).. Furthermore, INP
                                     numbers may only be used consistent with
                                     network efficiency and integrity, i.e.,
                                     inhibitions on mass calling events.

                              iv.    The ported telephone number will be
                                     returned to the switch which originally had
                                     the ported number when the ported service
                                     is

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<PAGE>

                                     disconnected. The normal intercept
                                     announcement will be provided by the
                                     porting company for the period of time
                                     until the telephone number is reassigned.

                             v.      Within thirty (30) days after the Effective
                                     Date of this Agreement, U S WEST shall
                                     provide Pac-West a list of those features
                                     that are not available for INP telephone
                                     numbers due to technical limitations.

               42.1.3 Ordering and Maintenance

                      (a)     Pac-West is responsible for all direct
                              interactions with Pac-West's end users with
                              respect to ordering and maintenance.

                      (b)     U S WEST shall exchange with Pac-West SS7 TCAP
                              messages as required for the implementation of
                              Custom Local Area Signaling Services (CLASS) or
                              other features available in the U S WEST network.

                      (c)     Each Party's designated INP switch must return
                              answer and disconnect supervision to the other
                              Party's switch.

                      (d)     U S WEST shall disclose to Pac-West any technical
                              or capacity limitations that would prevent use of
                              a requested INP in a particular switching office.

                      (e)     The Parties will develop and implement an
                              efficient deployment process to ensure call
                              routing integrity for toll and local calls, with
                              the objective to eliminate Customer downtime.

                      (f)     For INP, Pac-West shall have the right to use the
                              existing U S WEST 911 infrastructure for all 911
                              capabilities. When RCF is used for Pac-West
                              subscribers, both the ported numbers and shadow
                              numbers shall be stared in the ALI databases.
                              Pac-West shall have the right to verify the
                              accuracy of the information in the ALI databases
                              via direct connection to the SCC ALI database
                              pursuant to the same process and procedures SCC
                              makes available to U S WEST.

        42.2   Permanent Number Portability (PNP)

               42.2.1 Upon implementation of Permanent Number Portability (PNP)
                      pursuant to FCC regulations, both Parties agree to conform
                      and provide such Permanent Number Portability. To the
                      extent consistent with the FCC rules as amended from time
                      to time, the requirements for PNP shall include the
                      following:

               42.2.2 Subscribers must be able to change local service providers
                      and retain the same telephone number(s) consistent with
                      FCC rules and regulations.

               42-2.3 The PNP network architecture shall not subject alternate
                      local exchange carriers to any degradation of service
                      compared to U S WEST in any relevant measure, including
                      transmission quality, switching and transport costs,
                      increased call set-up time and post-dial delay, and
                      Pac-West shall not be required to rely on the U S WEST
                      network for calls completing to its ported Customers.

               42.2.4 When an office is equipped with PNP, in accordance with
                      the procedures specified by the North American Numbering
                      Council, the NXXs in the office shall be defined

                                       44
<PAGE>

                       as portable and translations will be changed in the
                       Parties' switches to open those NXXs for database
                       queries.

               42.2.5  When an NXX is defined as portable, it shall also be
                       defined as portable in all PNP-capable offices which have
                       direct trunks to the given switch.

               42.2.6. Upon introduction of PNP in an Metropolitan Statistical
                       Area ("MSA"), the applicable switches will be converted
                       according to a published schedule with no unreasonable
                       delay. All portable NXXs shall be recognized as portable,
                       with queries launched from these switches.

               42.2.7  Prior to implementation of PNP, the Parties agree to
                       develop, implement, and maintain efficient methods to
                       maintain 911 database integrity when a subscriber ports
                       to another service provider. The Parties agree that the
                       Customer should not be dropped from the 911 database
                       during the transition.

               42.2.8  When a subscriber ports to another service provider and
                       has previously secured a reservation of line numbers from
                       the donor provider for possible activation at some future
                       point, these reserved but inactive numbers shall "port"
                       along with the active numbers being ported by the
                       subscriber. So long as Pac-West maintains the reserved
                       numbers, U S WEST shall not reassign said numbers. The
                       Parties will allocate the revenue generated from number
                       reservations in accordance with a schedule to be mutually
                       agreed upon by the Parties within ninety (90) days of the
                       Effective Date of this Agreement.

               42.2.9  During the process of porting a subscriber, the donor
                       service provider shall implement the 10-Digit trigger
                       feature, when the technology is made available in each
                       switch in accordance with the schedules adopted by the
                       FCC. When the donor provider receives the porting
                       request, the unconditional trigger shall be applied to
                       the subscriber's line at the time that has been agreed to
                       via the Western Region LNP Operations Guidelines in order
                       to overcome donor network time delays in the
                       disconnection of the subscriber. Alternatively, when an
                       activation notice is sent to an NPAC to trigger a
                       broadcast to service provider databases, the donor switch
                       shall have its translations changed to disconnect the
                       subscriber's line within thirty (30) minutes or less
                       after the donor network Local SMS's has received the
                       broadcast. Porting requests that require coordination
                       between service providers, in accordance with the
                       guidelines, will be handled on a case-by-case basis and
                       will not be covered by the above.

               42.2.10 Both Pac-West and U S WEST shall:

                      (a)     support all emergency and operator services.
                      (b)     use scarce numbering resources efficiently and
                              administer such resources in a competitively
                              neutral manner.
                      (c)     jointly cooperate with each other to provide the
                              information necessary to rate and bill all types
                              of calls.
                      (d)     jointly cooperate with each other to apply PNP
                              consistently on a nationwide basis, and in
                              accordance with all FCC directives.

               42.2.11 A ten-digit code, consistent with the North American
                       Numbering Plan, shall be used as a network address for
                       each switch that terminates subscriber lines, i.e., an
                       end

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<PAGE>

                         office. This address shall support existing six-digit
                         routing and may be implemented without changes to
                         existing switch routing algorithms. In existing end
                         offices, this address shall be selected from one of its
                         existing NPA-NXXs. New end offices shall be assigned an
                         address through normal administrative processes.

               42.2.12   PNP employs an "N-1" (N minus 1) Query Strategy for
                         interLATA or intraLATA toll calls, by which the
                         originating carrier will pass the call to the
                         appropriate toll carder who will perform a query to an
                         external routing database and efficiently route the
                         call to the appropriate terminating local carrier
                         either directly or through an access tandem office.

               42.2.13   U S WEST shall furnish Pac-West with the first six (6)
                         digits of the originating address when it supplies
                         Pac-West with the Jurisdiction Information Parameter
                         for the originating address message.

               42.2.14   U S WEST agrees to begin the introduction of PNP to end
                         user subscribers who may begin changing local service
                         providers and retaining their existing telephone number
                         based on the time line set out by the FCC in its
                         Telephone Number Portability Order (CC Docket No.
                         95-116), or in accordance with a Commission order if
                         such time for introduction of PNP set by the Commission
                         is earlier than would result under the FCC Order.

               42.2.15   The generic requirements for the PNP alternative will
                         be implemented in accordance with industry-standard
                         specifications.

               42.2.16   For a local call to a ported number, the originating
                         carrier is the "N-1" carrier. It will perform an
                         external database query as soon as the call reaches the
                         first PNP-capable switch in the call path and pass the
                         call to the appropriate terminating carder. A
                         PNP-capable originating switch shall query on a local
                         call to a portable NXX as soon as it determines that it
                         (the originating switch) does not serve the dialed
                         number.

               42.2.17   U S WEST shall be the default carrier for database
                         queries where Pac-West is unable to perform its own
                         query due to abnormal conditions. Pac-West shall be the
                         default carder for database queries where U S WEST is
                         unable to perform its own query due to abnormal
                         conditions.

               42.2.18   U S WEST will provide Pac-West PNP for subscribers
                         moving to a different location, or staying at the same
                         location, within the same rate center area.

               42.2.19   U S WEST will work cooperatively with other local
                         service providers to establish the Western Region
                         Number Portability Administration Center/Service
                         Management System (SMS) The SMS shall be administered
                         by a neutral third party to provide for the efficient
                         porting of numbers between carriers. There must be one
                         (1) exclusive NPAC per portability State or region, and
                         U S WEST shall provide all information uploads and
                         downloads regarding ported numbers to/from,
                         respectively, the exclusive NPAC. U S WEST and
                         Pac-West shall cooperate to facilitate the expeditious
                         deployment of PNP through the process prescribed by the
                         FCC, including, but not limited to, participation in
                         the selection of a neutral third party and development
                         of SMS, as well as SMS testing for effective
                         procedures, electronic system interfaces, and overall
                         readiness for use consistent with that specified for
                         provisioning in this Agreement.

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<PAGE>

42.3    Requirements for INP and NP

        42.3.1 (Intentionally left blank for numbering consistency]

        42.3.2 Cut-Over Process

               The Parties shall cooperate in the process of porting numbers
               from one carder to another so as to limit service outage for the
               ported subscriber. This shall include, but not be limited to,
               each Party updating its respective network element translations
               within fifteen (15) minutes following notification by the
               industry SMS, or ported-to local service provider, and deploying
               such temporary translations as may be required to minimize
               service outage, e.g., unconditional triggers. In addition,
               Pac-West shall have the right to determine who initiates the
               order for INP in specific cut-over situations. The time frames in
               this paragraph shall be pursuant to Generic Requirements for SCP
               Application and GTT Function for Number Portability, Issue 0.99,
               January 6, 1997 and subsequent versions which may be adopted from
               time to time. The Parties shall cooperate to review and, if
               necessary, adjust the above time frame based on their actual
               experiences.

        42.3.3 Testing

               U S WEST and Pac-West shall cooperate in conducting Pac-West's
               testing to ensure interconnectivity between systems. U S WEST
               shall inform Pac-West of any system updates that may affect the
               Pac-West network and U S WEST shall, at Pac-West's request,
               perform tests to validate the operation of the network.
               Additional testing requirements may apply as specified by this
               Agreement.

        42.3.4 Engineering and Maintenance

               (a)    U S WEST and Pac-West will cooperate to ensure that
                      performance of trunking and signaling capacity is
                      engineered and managed at levels which are at least the
                      same level of service as provided by U S WEST to its
                      subscribers and to ensure effective maintenance testing
                      through activities such as routine testing practices,
                      network trouble isolation processes and review of
                      operational elements for translations, routing and network
                      fault isolation.

               (b)    Additional specific engineering and maintenance
                      requirements shall apply as specified in this Agreement.

        42.3.5 Recording and Billing

               The Parties shall provide each other with accurate billing and
               subscriber account record exchange data necessary for billing
               their subscribers whose numbers have been ported.

        42.3.6 Operator Services and Directory Assistance

               With respect to operator services and directory assistance
               associated with NP for Pac-West subscribers, U S WEST shall
               provide the following:

               (a)     While INP is deployed and prior to conversion to PNP:

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<PAGE>

                              i.   The Parties acknowledge that technology, as
                                   of the Effective Date of this Agreement, does
                                   not permit the provision of BLV/BLI to ported
                                   numbers. When such becomes available in the U
                                   S WEST network, such technology shall be made
                                   available to Pac-West.

                              ii.  U S WEST shall allow Pac-West to order
                                   provisioning of Telephone Line Number (TLN)
                                   calling cards and Billed Number Screening
                                   (BNS), in its LIDB, for ported numbers, as
                                   specified by Pac-West. U S WEST shall
                                   continue to allow Pac-West access to its
                                   LIDB. Other LIDB provisions are specified in
                                   this Agreement.

                              iii. Where U S WEST has control of Directory
                                   Listings for NXX codes containing ported
                                   numbers, U S WEST shall maintain entries for
                                   ported numbers as specified by Pac-West in
                                   accordance with the Listings Section of this
                                   Agreement.

                      (b)     When PNP is in place:

                              i.   The provisions in Section 42.3.6 preceding,
                                   shall apply when PNP is in place.

                              ii.  If Integrated Services Digital Network User
                                   Part (ISUP) signaling is used, U S WEST shall
                                   provide the Jurisdiction Information
                                   Parameter in the SSE7 Initial Address
                                   Message. (See Generic Switching and Signaling
                                   Requirements for Number Portability, Issue
                                   1.0, February 12, 1996 (Editor -Lucent
                                   Technologies, Inc.)).

                              iii. The Parties shall provide, when received from
                                   the NPAC, a 10-Digit Global Title Translation
                                   (GTT) Node for routing queries for TCAP-based
                                   operator services (e.g., LIDB). The acquiring
                                   company will provide the GTT to the NPAC. The
                                   NPAC will distribute this information to the
                                   donor company and all other parties.

                              iv.  U S WEST OSS shall meet all requirements
                                   specified in "Generic Operator Services
                                   Switching Requirements for Number
                                   Portability," Issue 1.1, June 20, 1996, as
                                   updated from time to time.

43.     Dialing Parity

        43.1   The Parties shall provide dialing parity to each other as
               required under Section 251(b)(3) of the Act or state law or
               regulation as appropriate.

        43.2   U S WEST shall ensure that all Pac-West Customers experience the
               same dialing parity as similarly-situated Customers of U S WEST
               services, such that, for example, for all call types: (a) an
               Pac-West Customer is not required to dial any greater number of
               digits than a similarly-situated U S WEST Customer, and (b) the
               Pac-West Customer may retain its local telephone number, so long
               as the Customer continues receiving service in the same central
               office serving area.

                                       48
<PAGE>

44.     Directory Listings

        44.1   Directory Listings General Requirements

               44.1.1 This Section 44 pertains to Directory Listings
                      requirements for the appearance of Pac-West end user
                      Directory Listings in directory assistance service or
                      directory product.

               44.1.2 U S WEST shall include in its master Directory Listing
                      database all list information for Pac-West Customers.

               44.1.3 U S WEST shall not sell or license, nor allow any third
                      party, the use of Pac-West Customer Listings without the
                      prior written consent of Pac-West. U S WEST shall not
                      disclose nor allow any third party to disclose non-listed
                      name or address information for any purpose other than
                      what may be necessary to complete directory distribution.

               44.1.4 Pac-West Customer Listings in the U S WEST Directory
                      Assistance database and Directory Listing database shall
                      be co-mingled with Listings of U S WEST and other CLEC
                      Customers.

               44.1.5 Each Pac-West Customer Primary Listing shall be provided,
                      at no charge, the same white page listings that U S WEST
                      provides its Customers.

               44.1.6 Each Pac-West business Customer Primary Listing shall be
                      provided, at no charge, the same yellow page classified
                      courtesy Listings that U S WEST provides its Customers.

               44.1.7 U S WEST shall also ensure that its directory publisher
                      publishes all types of Listings for Pac-West Customers
                      that are available to U S WEST Customers under the same
                      terms, and conditions, including, but not limited to:

                       (a)    Foreign listings
                       (b)    Reference listings
                       (c)    Information listings
                       (d)    Alternate call listings
                       (e)    Multi-line listings
                       (f)    Multi-line/Multi-owner listings

               44.1.8 Pac-West end user Listings property identified by Pac-West
                      as State, Local, and Federal government Listings shall be
                      appropriately coded in the U S WEST Directory Listing
                      database. U S WEST will provide government code
                      information to Pac-West.

               44-1.9 The listing and handling of Pac-West listed and non-listed
                      telephone numbers shall be at least at parity with that
                      provided by U S WEST to its own Customers, including
                      Pac-West customers who have ported telephone numbers from
                      U S WEST.

               44.1.10 U S WEST shall ensure that its directory publisher
                       publishes Pac-West sales, service, billing, and repair
                       information for business and residential Customers, along
                       with the Pac-West logo in the customer information/guide
                       pages of each directory at no charge to Pac-West.

                                       49
<PAGE>

        44.1.11     U S WEST is responsible for maintaining Listings, including
                    entering, changing, correcting, rearranging and removing
                    listings in accordance with Pac-West orders. Upon request,
                    and at least one (1) month prior to a given white page
                    directory close, a method of reviewing and correcting
                    Listings will be provided.

        44.1.12     For white pages and yellow pages advertising, U S WEST shall
                    ensure that (a) U S WEST's directory publisher sell such
                    advertising on a nondiscriminatory basis to Pac-West
                    Customers, (b) charges for such advertising will be billed
                    by U S WEST's directory publisher in the same manner as it
                    bills for U S WEST's customers' advertisements, and (c)
                    Pac-West shall receive commissions or other compensation
                    from U S WEST's directory publisher on all compensation
                    generated by such advertising at no less than the commission
                    or compensation rate paid to U S WEST or any of its
                    Affiliates.(22)

        44.1.13     U S WEST will permit Pac-West Customers to place orders for
                    Premium Listings and privacy listings. Pac-West will be
                    charged for Premium Listings and privacy listings at U S
                    WEST's general exchange tariff rates less the wholesale
                    discount rate. The Premium and privacy listing charges will
                    be billed to Pac-West and itemized at the telephone number
                    sub-account level.

        44.1.14     U S WEST shall ensure a third party distributes appropriate
                    alphabetical and classified directories (white and yellow
                    pages) and recycling services to Pac-West Customers at
                    parity with U S WEST end users, including providing
                    directories, a) upon establishment of new service; b) during
                    annual mass distribution; and c) upon Customer request.

        44.1.15     At no charge, U S WEST shall ensure that each directory
                    cover indicates inclusion of Pac-West customer listings.(23)

        44.1.16     U S WEST will provide the option of having CENTREX users
                    listed when Pac-West purchases CENTREX type services for
                    resale.

        44.1.17     Pac-West shall receive the same treatment as U S WEST
                    receives with respect to white and yellow page matters.(24)

44.2    Scope

        44.2.1 Pac-West grants U S WEST a non-exclusive license to incorporate
               Listings information into its Directory Assistance database.
               Pac-West shall select one of two options for U S WEST's use of
               Listings and dissemination of Listings to third parties.

               EITHER:

                 (a)  Treat the same as U S WEST's end user listings - No prior
                      authorization is needed for U S WEST to release Listings
                      to directory publishers or other third parties. U S WEST
                      will incorporate Listings information in all existing and
                      future Directory Assistance applications developed by U S
                      WEST.

----------

22      Procedural Order, July 14, 1997, pages 6-8.
23      Arizona Bench Order, May 29, 1997, p. 1600, Procedural Order, July 14,
        1997 at page 9.
24      Arizona Bench Order, May 29,1997, p. 1600, Procedural Order, July 14,
        1997 at page 9.

                                       50
<PAGE>

                      Pac-West authorizes U S WEST to sell and otherwise make
                      Listings available to directory publishers. Listings shall
                      not be provided or sold in such a manner as to segregate
                      end users by carrier.

                 OR:

                 (b)  Restrict to U S WEST's Directory Assistance services -
                      Prior authorization required from Pac-West for all other
                      uses. Pac-West makes its own, separate agreements with U S
                      WEST, third Parties and directory publishers for all uses
                      of its listings beyond DA. U S WEST will sell or provide
                      Listings to directory publishers (including U S WEST's
                      publisher affiliate) or other third Parties only after the
                      third party presents proof of Pac-West's authorization.
                      Listings shall not be provided or sold in such a manner as
                      to segregate end users by carrier.

                 (c)  U S WEST shall be entitled to retain all revenue
                      associated with any sales pursuant to subparagraphs (a)
                      and (b) above.(25)

44.3    U S WEST will take reasonable steps in accordance with industry
        practices to accommodate non-published and non-listed Listings provided
        that Pac-West has supplied U S WEST the necessary privacy indicators on
        such Listings.

44.4    Pac-West Responsibilities

        44.4.1 Pac-West agrees to provide to U S WEST its end user names,
               addresses and telephone numbers in a standard mechanized format,
               as utilized by U S WEST.

        44.4.2 Pac-West will supply its ACNA/CIC or CLCC/OCN, as appropriate,
               with each order to provide U S WEST the means of identifying
               listings ownership.

        44.4.3 Pac-West represents the end user information provided to U S WEST
               is accurate and correct. Pac-West further represents that it has
               reviewed all listings provided to U S WEST, including end user
               requested restrictions on use such as non-published and
               non-listed.

        44.4.4 Pac-West is responsible for dealings with, and on behalf of,
               Pac-West's end users on the following subjects:

               a)  All end user account activity, e.g., end user queries and
                   complaints.

               b)  All account maintenance activity, e.g., additions, changes,
                   issuance of orders for Listings to U S WEST.

               c)  Determining privacy requirements and accurately coding the
                   privacy indicators for Pac-West's end user information. If
                   end user information provided by Pac-West to U S WEST does
                   not contain a privacy indicator, no privacy restrictions will
                   apply.

----------

25      Procedural order, July 14, 1997 at page 10.

                                       51
<PAGE>

45.     [intentionally left blank for numbering consistency]

46.(26) U S WEST Dex Issues

        U S WEST and Pac-West agree that certain issues, such as yellow page
        advertising, directory distribution, access to call guide pages, and
        yellow page listings, will be the subject of negotiations between
        Pac-West and directory publishers, including U S WEST Dex.

        U S WEST acknowledges that Pac-West may request U S WEST to facilitate
        discussions between Pac-West and U S WEST Dex.

47.     Access to Poles, Ducts, Conduits, and Rights of Way

        47.1(27) Each Party shall provide the other Party nondiscriminatory
                 access to poles, ducts, rights-of-way and conduits it controls
                 on terms, conditions and prices as described herein. While the
                 language in Section 47 describes the provision of poles, ducts,
                 rights-of-way and conduits by U S WEST to Pac-West, the
                 language in this Section shall apply reciprocally to the
                 provision by Pac-West to U S WEST of poles, ducts,
                 rights-of-way and conduits not used by Pac-West to provide
                 exclusively long distance services .(28)

        47.2   [intentionally left blank for numbering consistency]

        47.3   Definitions

               "Poles, ducts, conduits and ROW' refer to all the physical
               facilities and legal rights which provide for access to pathways
               across public and private property. These include poles, pole
               attachments, ducts, innerducts, conduits, building entrance
               facilities, building entrance links, equipment rooms, remote
               terminals, cable vaults, telephone closets, building risers,
               rights-of-way, or any other requirements needed to create
               pathways. These pathways may run over, under, across or through
               streets, traverse private property, or enter multi-unit
               buildings. A Right-of-Way ("ROW') is the right to use the land or
               other property owned, leased, or controlled by any means by U S
               WEST to place poles, ducts, conduits and ROW or to provide
               passage to access such poles, ducts, conduits and ROW. A ROW may
               run under, on, or above public or private property (including air
               space above public or private property) and shall include the
               right to use discrete space in buildings, building complexes, or
               other locations.

        47.4   Requirements

               47.4.1 U S WEST shall make poles, duct, conduits and ROW
                      available to Pac-West upon receipt of a request for use
                      within the time periods provided in this Section,
                      providing all information necessary to implement such use
                      and containing rates, terms and conditions, including, but
                      not limited to, maintenance and use in accordance with
                      this Agreement and at least equal to those which it
                      affords itself, its Affiliates and others. Other users of
                      these facilities, including U S WEST, shall not interfere
                      with the availability or use of the facilities by
                      Pac-West.

----------

26      MCIm Order, p. 23 at Issue 36 and AT&T Order Issue 70.
27      MCIm Order, p. 22 at Issue 35.
28      MCIm Order, p. 22 at Issue 35; Procedural Order, July 14, 1997 at pages
        10-11.

                                       52
<PAGE>

               47.4.2 Within ten (10) Business Days of Pac-West's request for
                      specific poles, ducts, conduits, or ROW, U S WEST shall
                      provide any information in its possession or available to
                      it regarding the environmental conditions of such
                      requested poles, ducts, conduits or ROW route or location
                      including, but not limited to, the existence and condition
                      of asbestos, lead paint, hazardous substance
                      contamination, or radon. Information is considered
                      "available" under this Agreement if it is in U S WEST's
                      possession or files, or the possession of an agent,
                      contractor, employee, lessor, or tenant of U S WEST's that
                      holds such information on U S WEST's behalf. If the poles,
                      ducts, conduits or ROW contain such environmental
                      contamination, making the placement of equipment
                      hazardous, U S WEST shall offer alternative poles, ducts,
                      conduits or ROW for Pac-West's consideration. U S WEST
                      shall allow Pac-West to perform any environmental site
                      investigations, including, but not limited to, Phase I and
                      Phase 11 environmental site assessments, as Pac-West may
                      deem to be necessary.

               47.4.3 U S WEST shall not prevent or delay any third party
                      assignment of ROW to Pac-West.

               47.4.4 U S WEST shall offer the use of such poles, ducts,
                      conduits and ROW it has obtained from a third party to
                      Pac-West, to the extent such agreement does not prohibit U
                      S WEST from granting such rights to Pac-West. They shall
                      be offered to Pac-West on the same terms as are offered to
                      U S WEST. U S WEST shall exercise its eminent domain
                      authority when necessary to expand an existing ROW over
                      private property in order to accommodate a request from
                      Pac-West for access to such ROW.(29) Pac-West shall
                      reimburse U S WEST for U S WEST's reasonable costs, if
                      any, incurred as a result of the exercise of its eminent
                      domain authority on behalf of Pac-West in accordance with
                      the provisions of this paragraph.

               47.4.5 U S WEST shall provide Pac-West equal and
                      non-discriminatory access to poles, ducts, conduit and ROW
                      and any other pathways on terms and conditions equal to
                      that provided by U S WEST to itself or to any other
                      Person. Further, U S WEST shall not preclude or delay
                      allocation of these facilities to Pac-West because of the
                      potential needs of itself or of any other Person, except a
                      maintenance spare may be retained as described below.

               47.4.6 U S WEST shall not attach, or permit other entities to
                      attach facilities on, within or overlashed to existing
                      Pac-West facilities without Pac-West's prior written
                      consent.

               47.4.7 U S WEST agrees to provide current detailed engineering
                      and other plant records and drawings for specific requests
                      for poles, ducts, conduit and ROW, including facility
                      route maps at a city level, and the fees and expenses
                      incurred in providing such records and drawings, on the
                      earlier of twenty (20) Business Days from Pac-West's
                      request or the time within which U S WEST provides this
                      information to itself or any other Person.(30) Such
                      information shall be of equal type and quality as that
                      which is available to US WEST's own engineering and
                      operations staff. U S WEST shall also allow personnel
                      designated by Pac-West to jointly examine with U S WEST
                      personnel, at no cost to Pac-West for such personnel, such
                      engineering records and drawings for a specific routing at
                      U S WEST Central Offices and U S WEST Engineering Offices
                      upon ten (10) days'

----------

29      AT&T Order, p. 30 at Issue 55.
30      MCIm Order, p. 22, Issue 35.

                                       53
<PAGE>

               written notice to US WEST. U S WEST acknowledges that the request
               for information and the subject matter related to the request
               made under this Section shall be treated as Proprietary
               Information.

     47.4.8    U S WEST shall provide to Pac-West a Single Point of Contact for
               negotiating all structure lease and ROW arrangements.

     47.4.9    U S WEST shall provide information regarding the availability and
               condition of poles, ducts, conduit and ROW within five (5)
               Business Days of Pac-West's request if the information then
               exists in U S WEST's records (a records based answer) and within
               twenty (20) Business Days of Pac-West's request if U S WEST must
               physically examine the poles, ducts, conduits and ROW (a field
               based answer) ("Request"). Pac-West shall have the option to be
               present at the field based survey and U S WEST shall provide
               Pac-West at least twenty-four (24) hours' notice prior to the
               start of such field survey. During and after this period, U S
               WEST shall allow Pac-West personnel to enter manholes and
               equipment spaces and view pole structures to inspect such
               structures in order to confirm usability or assess the condition
               of the structure. US WEST shall send Pac-West a written notice
               confirming availability pursuant to the Request within such
               twenty (20) day period ("Confirmation").

     47.4.10   Reservation. For the period beginning at the time of the Request
               and ending ninety (90) days following Confirmation, U S WEST
               shall reserve such poles, ducts, conduit and ROW for Pac-West
               that Pac-West may reasonably request. Pac-West shall pay an
               appropriate reservation fee mutually agreed upon by the Parties
               for such reservation and shall elect whether to accept the poles,
               ducts, conduits, or ROW within the ninety (90) day period
               following Confirmation. Pac-West may accept such facilities by
               sending written notice to U S WEST ("Acceptance").

               47.4.10.1  Right of First Refusal. During the Reservation Period,
                          if another party, including US WEST, makes a bona fide
                          and good faith request for the use of any poles,
                          ducts, conduits or ROW that Pac-West has previously
                          reserved, Pac-West shall have a "right of first
                          refusal" over these facilities. If Pac-West chooses to
                          exercise its right of first refusal, it shall do so by
                          providing US WEST written notice of same within ten
                          (10) Business Days following receipt of written notice
                          from U S WEST advising Pac-West. of the bona fide and
                          good faith request.

               47.4.10.2  Exercise of Right of First Refusal/Reservation. To
                          ensure proper use of reserved facilities, after the
                          expiration of the reservation period or upon exercise
                          of its right of first refusal, whichever occurs
                          earlier, Pac-West must begin paying the approved rate
                          for access (whether or not it has actually installed
                          conduit or cable) and shall begin construction on the
                          facility within six (6) months, or release its
                          reservation.

     47.4.11   Reservation. After Acceptance by Pac-West, Pac-West shall have
               six (6) months to begin attachment and/or installation of its
               facilities to the poles, ducts, conduit and ROW or request U S
               WEST to begin make ready or other construction activities. Any
               such construction, installation or make ready by Pac-West shall
               be completed by the end of one (1) year after Acceptance.

                                       54
<PAGE>

               Pac-West shall not be in default of the 6-month or 1-year
               requirement above if such default is caused in any way by any
               action, inaction or delay on the part of U S WEST or its
               Affiliates or subsidiaries.

     47.4.12   Make Ready. U S WEST shall rearrange, modify and/or make ready
               existing poles, ducts, conduit and ROW where necessary and
               feasible to provide space for Pac-West's requirements. Subject to
               the requirements above, the Parties shall endeavor to mutually
               agree upon the time frame for the completion of such work within
               five (5) days following Pac-West's request; provided, however,
               that any such work required to be performed by U S WEST shall be
               completed within sixty (60) days or a reasonable period of time
               based on standard construction intervals in the industry, unless
               otherwise agreed by Pac-West in writing.

     47.4.13   New  Construction. After  Acceptance, U S WEST shall complete any
               new construction, relocation or installation of poles, ducts,
               conduits or ROW required to be performed by U S WEST or any U S
               WEST construction, relocation or installation requested by
               Pac-West within a reasonable period of time based on standard
               construction intervals in the industry or sixty (60) days after
               obtaining all governmental authority or permits necessary to
               complete such construction, relocation or installation. If U S
               WEST anticipates that construction, relocation or installation
               will go beyond standard industry intervals or the sixty (60) day
               period, U S WEST shall immediately notify Pac-West and the
               Parties shall mutually agree on a completion date.

     47.4.14   Pac-West shall begin payment for the use of newly constructed
               poles, ducts, conduit, and ROW upon completion of such
               construction and installation and confirmation by appropriate
               testing methods that the facilities are in a condition ready to
               operate in Pac-West's network or upon use (other than for
               testing) by Pac-West, whichever is earlier.

     47.4.15   Pac-West shall make payment for construction, relocation,
               rearrangements, modifications and make ready in accordance with
               Section 3.5 of Attachment 1 of this Agreement.

     47.4.16   Pac-West shall begin payment for the use of existing poles,
               ducts, conduit and ROW within ninety (90) days following
               Confirmation.(31)

     47.4.17   Pac-West may, at its option, install its facilities on poles,
               ducts, conduit and ROW and use Pac-West or Pac-West designated
               personnel to attach its equipment to such U S WEST poles, ducts,
               conduits and ROW.

     47.4.18   If available, U S WEST shall provide Pac-West space in manholes
               for racking and storage of cable and other materials as requested
               by Pac-West.

     47.4.19   U S WEST shall rearrange, modify and/or make ready any conduit
               system or poles with retired cable by removing such retired cable
               from conduit systems or poles to allow for the efficient use of
               conduit space and pole space. U S WEST shall take all reasonable
               steps to expand its facilities to accommodate Pac-West's request,
               and shall do so in accordance with the time frames set forth in
               this

----------

31      MCIm Order, p. 2-2 at Issue 35.

                                       55
<PAGE>

                        Section 47.(32) Before denying access based on a lack of
                        capacity, U S WEST must explore potential accommodations
                        with Pac-West.

               47.4.20  Where U S WEST has innerducts which are not, at that
                        time, being used or are not reserved as emergency or
                        maintenance spare in accordance with FCC rules and
                        regulations, U S WEST shall offer such ducts for
                        Pac-West's use.

               47.4.21  Where a spare innerduct does not exist, U S WEST shall
                        allow Pac-West to install an innerduct in U S WEST
                        conduit, at Pac-West's cost and expense. U S WEST must
                        review and approve any installation of innerduct in any
                        U S WEST's duct prior to the start of construction. Such
                        approval shall not be unreasonably delayed, withheld or
                        conditioned. Pac-West shall provide notice to U S WEST
                        of any work activity not less than twenty-four (24)
                        hours prior to the start of construction.

               47.4.22  Where U S WEST has any ownership or other rights to ROW
                        to buildings or building complexes, or within buildings
                        or building complexes, U S WEST shall offer such ROW to
                        Pac-West.

                        (a)     Subject to the approval of the building owner,
                                if required, the right to use any available
                                space owned or controlled by U S WEST in the
                                building or building complex to install Pac-West
                                equipment and facilities;

                        (b)     Subject to the approval of the building owner,
                                if required, ingress and egress to such space;
                                and

                        (c)     Subject to the approval of the building owner,
                                if required, the right to use electrical power
                                at parity with U S WEST's rights to such power.

               47.4.23  Whenever U S WEST intends to modify or alter any poles,
                        ducts, conduits or ROW which contain Pac-West's
                        facilities, U S WEST shall provide written notification
                        of such action to Pac-West so that Pac-West may have a
                        reasonable opportunity to add to or modify its
                        facilities. Pac-West shall advise U S WEST, in writing,
                        of its intentions to add or modify the facilities within
                        fifteen (15) Business Days of U S WEST's notification.
                        If Pac-West adds to or modifies its facilities according
                        to this paragraph, Pac-West shall bear a proportionate
                        share of the costs incurred by U S WEST in making such
                        facilities accessible.

               47.4.24  Pac-West shall not be required to bear any of the costs
                        of rearranging or replacing its facilities, if such
                        rearrangement or replacement is required as a result of
                        an additional attachment or the modification of an
                        existing attachment sought by any entity other than
                        Pac-West, including U S WEST.

               47.4.25  U S WEST shall maintain the poles, ducts, conduits and
                        ROW at its sole cost. Pac-West shall maintain its own
                        facilities installed within the poles, ducts, conduits
                        and ROW at its sole cost. In the event of an emergency,
                        U S WEST shall begin repair of its facilities containing
                        Pac-West's facilities within a reasonable time frame
                        based on industry standards or a time frame requested by
                        Pac-West If U S WEST cannot begin repair within the
                        requested time frame, upon notice and approval of U S
                        WEST, which approval shall not be unreasonably withheld,
                        Pac-West may begin such repairs without the presence of
                        U S WEST personnel. Pac-West may climb poles and enter
                        the manholes, handholds, conduits and equipment spaces

----------

32      AT&T Order, Issue 54.

                                       56
<PAGE>

                       containing U S WEST's facilities in order to perform such
                       emergency maintenance, but only until such time as
                       qualified personnel of US WEST arrives ready to continue
                       such repairs. For both emergency and non-emergency
                       repairs, Pac-West may use spare innerduct or conduits,
                       including the innerduct or conduit designated by U S WEST
                       as emergency spare for maintenance purposes; provided,
                       however, that Pac-West may only use such spare conduit or
                       innerduct for a maximum period of ninety (90) days.

               47.4.26 In the event of a relocation necessitated by a
                       governmental entity exercising the power of eminent
                       domain, when such relocation is not reimbursable, all
                       parties shall share pro rata in costs for relocating the
                       base conduit or poles and shall each pay its own cost of
                       cable and installation of the facilities in the newly
                       rebuilt U S WEST poles, ducts, conduits and ROW.

48.     Bona Fide Request Process for Further Unbundling

        48.1(33) Any request for Interconnection or access to an unbundled
                 Network Element not already available via price lists, tariff,
                 or as described herein shall be treated as a "Request" under
                 this Section.

        48.2     U S WEST shall use the Bona Fide Request ("BFR") process as
                 described in this Section 48, to determine the technical
                 feasibility of the requested Interconnection or Network
                 Element(s) and, for those items found to be technically
                 feasible, to provide the terms and timetable for providing the
                 requested items. Additionally, elements, services and functions
                 which are materially or substantially different from those
                 services, elements or functions already provided by U S WEST to
                 itself, its Affiliates, Customers, or end users may, at the
                 discretion of Pac-West, be subject to this BFR. process.

        48.3     A Request shall be submitted in writing and, at a minimum,
                 shall include: (a) a complete and accurate technical
                 description of each requested Network Element or
                 Interconnection; (b) the desired interface specifications; (c)
                 a statement that the Interconnection or Network Element will be
                 used to provide a Telecommunications Service; (d) the quantity
                 requested; (e) the location(s) requested; and (f) whether
                 Pac-West wants the requested item(s) and terms made generally
                 available. Pac-West may designate a Request as Confidential.

        48.4     Within forty-eight (48) hours of receipt of a Request, U S WEST
                 shall acknowledge receipt of the Request and review such
                 Request for initial compliance with Subsection 48.3 above. In
                 its acknowledgment, U S WEST shall advise Pac-West of any
                 missing information reasonably necessary to move the Request to
                 the preliminary analysis described in Subsection 48.5 below.

        48.5     Unless otherwise agreed to by the Parties, within thirty (30)
                 calendar days of its receipt of the Request and all information
                 necessary to process it, U S WEST shall provide to Pac-West a
                 preliminary analysis of the Request. As reasonably requested by
                 Pac-West, U S WEST agrees to provide status updates to Pac-West
                 U S WEST will notify Pac-West if the quote preparation fee, if
                 any, will exceed $5,000. Pac-West will approve the continuation
                 of the development of the quote prior to U S WEST incurring any
                 reasonable additional expenses. The preliminary analysis shall
                 specify whether or not the requested

----------

33      The MCIm Order, p. 9 at Issue 10, sets forth a stricter time line for U
        S WEST to follow in responding to BFRs than does the following
        agreed-upon language. The Parties have subsequently agreed to the time
        frames as set forth in this Section.

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               Interconnection or access to an unbundled Network Element is
               technically feasible and otherwise qualifies as a Network Element
               or Interconnection as defined under the Act.

     48.5.1    If U S WEST determines during the thirty (30) day period that a
               Request is not technically feasible or that the Request otherwise
               does not qualify as a Network Element or Interconnection required
               to be provided under the Act, U S WEST shall so advise Pac-West
               as soon as reasonably possible of that fact, and promptly provide
               a written report setting forth the basis for its conclusion but
               in no case later than ten (10) calendar days after making such
               determination.

     48.5.2    If U S WEST determines during the thirty (30) day period that the
               Request is technically feasible and otherwise qualifies under the
               Act, it shall notify Pac-West in writing of such determination,
               no later than ten (10) calendar days after making such
               determination.

     48.5.3    Unless otherwise agreed to by the Parties, as soon as feasible,
               but no more than ninety (90) calendar days after U S WEST
               notifies Pac-West that the Request is technically feasible, U S
               WEST shall provide to Pac-West a Request quote which will
               include, at a minimum, a description of each Interconnection and
               Network Element, the quantity to be provided, the installation
               intervals (both initial and subsequent), the impact on shared
               systems software interfaces, the ordering process changes, the
               functionality specifications, any interface specifications, and
               either:

               (a)    the applicable rates (recurring and nonrecurring),
                      including the amortized development costs, as appropriate
                      pursuant to Section 48.5.4 below, of the Interconnection
                      or Network Element; or

               (b)    the payment for development costs, as appropriate pursuant
                      to Section 48.5.4 below, of the Interconnection or Network
                      Element and the applicable rates (recurring and
                      nonrecurring), excluding the development costs.

     48.5.4    The choice of using either option (a) or (b) above shall be at U
               S WEST's sole discretion. A payment for development cost,
               however, is appropriate only where Pac-West is the only
               conceivable user of the functionality (including consideration of
               U S WEST as a potential user) or where the requested quantity is
               insufficient to provide amortization.

48.6   If U S WEST has used option (a) above in its Request quote, then, within
       thirty (30) days of its receipt of the Request quote, Pac-West must
       indicate its nonbinding interest in purchasing the Interconnection or
       Network Element at the stated quantities and rates, cancel it Request, or
       seek remedy under the dispute resolution section of this Agreement

48.7   If U S WEST has used option (b) above in its Request quote, then, within
       thirty (30) days of its receipt of the Request quote, Pac-West must
       either agree to pay the development costs of the Interconnection or
       Network Element, cancel its Request, or seek remedy under the dispute
       resolution section of this Agreement.

48.8   If U S WEST has used option (b) in its Request quote and Pac-West has
       accepted the quote, Pac-West may cancel the Request at any time, but will
       pay U S WEST's reasonable development costs of the Interconnection or
       Network Element up to the date of cancellation.

48.9   U S WEST will use reasonable efforts to determine the technical
       feasibility and conformance with the Act of the Request within the first
       thirty-two (32) days of receiving the Request. In

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               the event U S WEST has used option (b) above in its Request quote
               and U S WEST later determines that the Interconnection or Network
               Element requested in the Request is not technically feasible or
               otherwise does not qualify under the Act, U S WEST shall notify
               Pac-West within ten (10) Business Days of making such
               determination and Pac-West shall not owe any compensation to U S
               WEST in connection with the Request. Any quotation preparation
               fees or development costs paid by Pac-West to the time of such
               notification shall be refunded by U S WEST.

        48.10  To the extent possible, U S WEST will utilize information from
               previously developed BFRs to address similar arrangements in
               order to shorten the response times for the currently requested
               BFR. In the event Pac-West has submitted a Request for an
               Interconnection or a Network Element and U S WEST determines in
               accordance with the provisions of this Section 48 that the
               Request is technically feasible, the Parties agree that
               Pac-West's subsequent request or order for the identical type of
               Interconnection or Network Element shall not be subject to the
               BFR process. To the extent U S WEST has deployed an identical
               Network Element under a previous BFR, a subsequent BFR is not
               required. For purposes of this Section 48.10, an "identical"
               request shall be one that is materially identical to a previous
               request with respect to the information provided pursuant to
               Subsections (a) through (e) of Section 48.3 above.

        48.11  In the event of a dispute under this Section 48, the Parties
               agree to seek expedited Commission resolution of the dispute, to
               be completed within twenty (20) days of U S WEST's response
               denying Pac-West's BFR, and in no event more than thirty (30)
               days after the filing of Pac-West's petition. Alternatively, the
               Parties may mutually agree to resolve any disputes under this
               section through the dispute resolution process pursuant to
               Section 27, Part A of this Agreement.

        48.12  All time intervals within which a response is required from one
               Party to another under this Section 48 are maximum time
               intervals. The Parties agree that they will provide all responses
               to the other Party as soon as the Party has the information and
               analysis required to respond, even if the time interval stated
               herein for a response is not over.

49.     Audit Process

        49.1   As used herein, "Audit' shall mean a comprehensive review of
               services performed under this Agreement. Either Party (the
               "Requesting Party") may perform up to three (3) Audits per
               12-month period commencing with the Effective Date.

        49.2   Upon thirty (30) days' written notice by the Requesting Party to
               the other Party (the "Audited Party"), the Requesting Party shall
               have the right, through its authorized representative, to make an
               Audit, during normal business hours, of any records, accounts and
               processes which contain information related to the services
               provided and performance standards agreed to under this
               Agreement. Within the above-described 30-day period, the Parties
               shall reasonably agree upon the scope of the Audit, the documents
               and processes to be reviewed, and the time, place and manner in
               which the Audit shall be performed. The Audited Party agrees to
               provide Audit support including appropriate access to and use of
               the Audited Party's facilities (e.g., conference rooms,
               telephones, copying machines).

        49.3   Each Party shall bear its own expenses in connection with the
               conduct of the Audit. The reasonable cost of special data
               extractions required by the Requesting Party to conduct the Audit
               will be paid for by the Requesting Party. For purposes of this
               Section 49.3, a "Special Data Extraction" shall mean the creation
               of an output record or informational report (from existing data
               files) that is not created in the normal course of business. If
               any program is

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<PAGE>

               developed to the Requesting Party's specifications and at the
               Requesting Party's expense, the Requesting Party shall specify at
               the time of request whether the program is to be retained by the
               Audited Party for reuse for any subsequent Audit. Notwithstanding
               the foregoing, the Audited Party shall pay all of the Requesting
               Party's external expenses (including, without limitation, the
               fees of any independent auditor), in the event an Audit results
               in an adjustment in the charges or in any invoice paid or payable
               by the Requesting Party hereunder in an amount that is, on an
               annualized basis, more than the greater of (a) one percent (1 %)
               of the amount in dispute or (b) $10,000.

      49.4     Adjustments, credits or payments shall be made and any corrective
               action shall commence within thirty (30) days from the Audited
               Party's receipt of the final audit report to compensate for any
               errors or omissions which are disclosed by such Audit and are
               agreed to by the Parties. The highest interest rate allowable by
               law for commercial transactions shall be assessed and shall be
               computed by compounding daily from the time of the original due
               date of the amount of dispute.

        49.5   Neither such right to examine and audit nor the right to receive
               an adjustment shall be affected by any statement to the contrary
               appearing on checks or otherwise.

        49.6   This Section 49 shall survive expiration or termination of this
               Agreement for a period of two (2) years after expiration or
               termination of this Agreement.

        49.7   All transactions under this Agreement which are over thirty-six
               (36) months old are no longer subject to Audit.

        49.8   All information received or reviewed by the Requesting Party or
               the independent auditor in connection with the Audit is to be
               considered Proprietary Information as defined by this Agreement.
               The Audited Party reserves the right to require any non-employee
               who is involved directly or indirectly in any Audit or the
               resolution of its findings as described above to execute a
               nondisclosure agreement satisfactory to the Audited Party. To the
               extent an Audit involves access to information of third parties,
               the Audited Party will aggregate such competitors' data before
               release to the Requesting Party, to insure the protection of the
               proprietary nature of information of other competitors. To the
               extent a competitor is an Affiliate of the Audited Party
               (including itself and its subsidiaries), the Parties shall be
               allowed to examine such Affiliate's disaggregated data, as
               required by reasonable needs of the Audit.

        49.9   An "Examination" shall mean an inquiry reasonably requested by
               either Party into a specific element of or process where the
               requesting Party raises a dispute concerning services performed
               by the other Party under this Agreement and such dispute has not
               been resolved through the escalation process described in this
               Agreement. Only that information that is necessary to resolve the
               dispute in issue must be provided in the course of an Examination
               and the total time involved in an Examination for each Party may
               not exceed three (3) people for three (3) days. Appropriate
               provisions of this Section 49 that apply to Audits shall also
               apply to Examinations, except that either Party may conduct only
               a total of nine (9) Examinations and Audits per year, with a
               maximum of three (3) Audits per year.(34)

----------

34      Arizona Bench Order, May 29,1997 Hearing, p.1613.

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50.     Miscellaneous Services

        50.1   Basic 911 and E911 General Requirements

               50-1.1 Basic 911 and E911 provides a caller access to the
                      appropriate emergency service bureau by dialing a 3-digit
                      universal telephone number (911). Basic 911 and E911
                      access from Local Switching shall be provided to Pac-West
                      in accordance with the following:

               50.1.2 Each Party will be responsible for those portions of the
                      911 System for which it has reasonable control, including
                      any necessary maintenance to each Party's portion of the
                      911 System.

               50.1.3 E911 shall provide additional routing flexibility for 911
                      calls. E911 shall use Customer data, contained in the
                      Automatic Location Identification/Data Management System
                      ("ALI/DMS"), to determine to which Public Safety Answering
                      Point (PSAP) to route the call.

               50.1.4 If available in the U S WEST network, U S WEST shall offer
                      a third type of 911 service, S911. All requirements for
                      E91 1 also apply to S91 1 with the exception of the type
                      of signaling used on the interconnection trunks from the
                      local switch to the E911 Tandem.

               50.1.5 Basic 911 and E911 functions provided to Pac-West shall be
                      at least at parity with the support and services that U S
                      WEST provides to its Customers for such similar
                      functionality.

               50.1.6 Basic 911 and E911 access from Local Switching shall be
                      provided to Pac-West in accordance with the following:

                      50.1.6.1   U S WEST shall conform to all state regulations
                                 concerning emergency services.

                      50.1.6.2   For E911 provided to resold lines or in
                                 association with unbundled switching, U S WEST
                                 shall use its service order process to update
                                 and maintain Customer information in the
                                 ALI/DMS data base. Through this process, U S
                                 WEST shall provide and validate Customer
                                 information resident or entered into the
                                 ALI/DMS data base.

               50.1.7 U S WEST shall provide for overflow 911 traffic consistent
                      with U S WEST policy and procedure.

               50-1.8 Basic 911 and E911 access from the Pac-West local switch
                      shall be provided to Pac-West in accordance with the
                      following:

                      50.1.8.1   If required by Pac-West, U S WEST shall
                                 interconnect direct trunks from the Pac-West
                                 network to the E911 Tandem for connection to
                                 the PSAP. Such trunks to the E911 Tandem may
                                 alternatively be provided by Pac-West.

                      50.1.8.2   In government jurisdictions where U S WEST has
                                 obligations under existing agreements as the
                                 primary provider of the 911 System to the

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                              county, Pac-West shall participate in the
                              provision of the 911 System as follows:

                              (a)   Each Party shall be responsible for those
                                    portions of the 911 System for which it has
                                    control, including any necessary maintenance
                                    to each Party's portion of the 911 System.

                              (b)   U S WEST shall be responsible for
                                    maintaining the E-911 database.

                    50-1.8.3  If a third party is the primary service provider
                              to a government agency, Pac-West shall negotiate
                              separately with such third party with regard to
                              the provision of 911 service to the agency. All
                              relations between such third party and Pac-West
                              are totally separate from this Agreement and U S
                              WEST makes no representations on behalf of the
                              third party.

                    50.1.8.4  If Pac-West or an Affiliate is the primary service
                              provider to a government agency, Pac-West and U S
                              WEST shall negotiate the specific provisions
                              necessary for providing 911 service to the agency
                              and shall include such provisions in an amendment
                              to this Agreement.

                    50.1.8.5  Interconnection and database access shall be
                              priced as specified in Attachment 1 to this
                              Agreement or at any rate charged to other
                              interconnected carriers, whichever is lower.

                    50.1.8.6  Pac-West will separately negotiate with each
                              county regarding the collection and reimbursement
                              to the county of applicable Customer taxes for 911
                              service.

                    50.1.8.7  U S WEST shall comply with established,
                              competitively neutral intervals for installation
                              of facilities, including any collocation
                              facilities, diversity requirements, etc.

                    50.1.8.8  In a resale situation, where it may be appropriate
                              for U S WEST to update the ALI database, U S WEST
                              shall update such database with Pac-West data in
                              an interval no less than is experienced by U S
                              WEST Customers, or than for other carriers,
                              whichever is faster, at no additional cost

          50.1.9 The following are Basic 911 and E911 Database Requirements:

                    50-1.9.1  The ALI database shall be managed by U S WEST, but
                              is the property of U S WEST and any participating
                              telephone company and CLEC for those records
                              provided by the company.

                    50-1.9.2  U S WEST, or its agent, will be responsible for
                              maintaining the E-911 Data Base. U S WEST, or its
                              agent, will provide a copy of the Master Street
                              Address Guide ('MSAG"), and periodic updates, to
                              Pac-West

                    50.1.9.3  Copies of the MSAG shall be provided within
                              twenty-one (21) calendar days from the time
                              requested and shall be provided on diskette,
                              magnetic tape, or in a format suitable for use
                              with desktop computers.

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                      50-1.9.4   Pac-West assumes all responsibility for the
                                 accuracy of the data that Pac-West provides to
                                 U S WEST for MSAG preparation and E-91 I
                                 Database operation.

                      50.1.9.5   Pac-West shall be solely responsible for
                                 providing Pac-West database records to U S WEST
                                 for inclusion in U S WEST's ALI database on a
                                 timely basis.

                      50.1.9.6   Pac-West will provide end user data to the U S
                                 WEST ALI database that are Master Street
                                 Address Guide (MSAG) valid.

                      50.1.9.7   Pac-West will update its end user records
                                 provided to the U S WEST ALI database to agree
                                 with the 911 MSAG standards for its service
                                 areas.

                      50.1.9.8   U S WEST and Pac-West shall arrange for the
                                 automated input and periodic updating of the
                                 E911 database information related to Pac-West
                                 end users for resold lines in accordance with
                                 Section 10.1 of Attachment 2 to this Agreement.
                                 Pac-West may request, through the BFR process,
                                 similar arrangements for Pac-West customers
                                 served on a non-resale basis. U S WEST will
                                 furnish Pac-West any variations to NENA
                                 recommendations required for ALI database
                                 input. The cost of magnetic tape transfer shall
                                 be borne by Pac-West.

                      50.1.9.9   U S WEST and Pac-West shall arrange for the
                                 automated input and periodic updating of the
                                 E911 database information related to Pac-West
                                 end users. For resold services, US WEST shall
                                 work  cooperatively  with Pac-West to ensure
                                 the accuracy of the data transfer by verifying
                                 it against the Master Street Address Guide
                                 (MSAG). For Pac-West's customers served by
                                 unbundled Network Elements or through
                                 Pac-West's own facilities, Pac-West shall
                                 ensure the accuracy of its 911 data by
                                 verifying it against the MSAG.

                      50.1.9.10  Pac-West shall assign an E911 database
                                 coordinator charged with the responsibility of
                                 forwarding Pac-West end user ALI record
                                 information to U S WEST or via a third-party
                                 entity, charged with the responsibility of ALI
                                 record transfer. Pac-West assumes all
                                 responsibility for the accuracy of the data
                                 that Pac-West provides to U S WEST.

                      50.1.9.11  The Parties shall maintain a single point of
                                 contact to coordinate all E91 1 activities
                                 under this Agreement

                      50.1.9.12  For resold services, Pac-West shall provide
                                 information on new Customers to U S WEST within
                                 one (1) Business Day of the order completion. U
                                 S WEST shall update the database within two (2)
                                 Business Days of receiving the data from
                                 Pac-West If U S WEST detects an error in the
                                 Pac-West provided data, the data shall be
                                 returned to Pac-West within two (2) Business
                                 Days from when it was provided to U S WEST.
                                 Pac-West shall respond to requests from U S
                                 WEST to make corrections to database record
                                 errors by uploading corrected records within
                                 two (2) business days. Manual entry shall be
                                 allowed only in the event that the system is
                                 not functioning properly. Pac-West may request,
                                 through the BFR process, similar services from
                                 U S WEST for their customers who are served on
                                 a non-resale basis.

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                      50.1-9.13  The Parties will cooperate to implement the
                                 adoption of a Carrier Code (NENA standard
                                 five-character field) on all ALI records
                                 received from Pac-West, when those standards,
                                 NENA-02-OON, are adopted by the industry
                                 standards process. U S WEST will furnish
                                 Pac-West any variations from NENA
                                 recommendations required for ALI database
                                 input. The Carrier Code will be used to
                                 identify the carrier of record in INP
                                 configurations.

                      50.1.9.14  Pac-West will provide end user data to the U S
                                 WEST ALI database utilizing NENA-02-001
                                 Recommended Formats For Data Exchange, and
                                 Recommended Standard For Street Thoroughfare
                                 Abbreviations and Protocols For Data Exchange
                                 and Data Quality utilizing NENA Recommended
                                 Formats for Data Exchange document dated June
                                 1993.

                      50.1.9.15  U S WEST shall identify which ALI databases
                                 cover which states, counties or parts thereof,
                                 and identify and communicate a point of contact
                                 for each.

                      50.1.9.16  U S WEST will provide Pac-West with the
                                 identification of the US WEST 911 controlling
                                 office that serves each geographic area served
                                 by Pac-West.

                      50.1.9.17  U S WEST shall provide to Pac-West, for
                                 Pac-West Customers, E911/911 call routing to
                                 the appropriate Public Safety Answering Point
                                 ("PSAP") for resold lines. U S WEST shall
                                 provide and validate Pac-West Customer
                                 information to the PSAP in the same fashion as
                                 it does for its own Customers. U S WEST shall
                                 use its service order process to update and
                                 maintain, on the same schedule that it uses for
                                 its end users, the Pac-West Customer service
                                 information in the ALI/DMS used to support
                                 E911/911 services. Pac-West may request,
                                 through the BFR process, similar services from
                                 U S WEST for their customers who are served on
                                 a non-resale basis.

                      50.1.9.18  Pac-West exchanges to be included in U S WEST's
                                 E911 Database will be indicated via written
                                 notice and will not require an amendment to
                                 this Agreement.

          50.1.10   The following are Basic 911 and E91 1 Network Requirements:

                      50.1.10.1  U S WEST, at Pac-West option, shall provide a
                                 minimum of two (2) E911 trunks per
                                 jurisdictional area, or that quantity which
                                 will maintain P.01 transmission grade of
                                 service, or the level of service provided by U
                                 S WEST to itself, whichever is the higher grade
                                 of service. These trunks will be dedicated to
                                 routing 911 calls from Pac-West switch to a U S
                                 WEST E911 tandem.

                      50.1.10.2  US WEST shall provide Pac-West a data link to
                                 the ALI/DMS database or permit Pac-West to
                                 provide its own data link to the ALI/DMS
                                 database. U S WEST shall provide error reports
                                 from the ALI/DMS database to Pac-West
                                 immediately after Pac-West inputs information
                                 into the ALI/DMS database. Alternately,
                                 Pac-West may utilize U S WEST or a third party
                                 entity to enter Customer information

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                                 into the database on a demand  basis,  and
                                 validate  Customer information on a demand
                                 basis.

                      50-1.10.3  U S WEST shall provide the selective routing of
                                 E911 calls received from Pac-West switching
                                 office. This includes the ability to receive
                                 the ANI of the Pac-West Customer, selectively
                                 route the call to the appropriate PSAP, and
                                 forward the Customers ANI to the PSAP. U S WEST
                                 shall provide Pac-West with the appropriate
                                 CLLI codes and specifications regarding the
                                 tandem serving area associated addresses and
                                 meet points in the network.

                      50.1.10.4  Copies of E911 Tandem Boundary Maps shall be
                                 available to Pac-West Each map shows the areas
                                 served by that E91 tandem. The map provides
                                 Pac-West the information necessary to set up
                                 its network to route E911 callers to the
                                 correct E911 tandem.

                      50.1.10.5  Pac-West shall ensure that its switch provides
                                 an eight-digit ANI consisting of an information
                                 digit and the seven-digit exchange code.
                                 Pac-West shall also ensure that its switch
                                 provides the line number of the calling
                                 station. In the event of a change in industry
                                 standards, the Parties shall cooperate to
                                 incorporate the changed standards in their
                                 respective networks.

                      50.1.10.6  Each ALI discrepancy report shall be jointly
                                 researched by U S WEST and Pac-West. Corrective
                                 action shall be taken immediately by the
                                 responsible party.

                      50.1.10.7  Technical specifications for E911 network
                                 interface are available through U S WEST
                                 technical publication 77338. Technical
                                 specifications for database loading and
                                 maintenance are available through the third
                                 party database manager - SCC.

                      50.1.10.8  US WEST shall begin restoration of E911 and/or
                                 E911 trunking facilities immediately upon
                                 notification of failure or outage. U S WEST
                                 must provide priority restoration of trunks or
                                 networks outages on the same terms/conditions
                                 it provides itself and without the imposition
                                 of Telecommunications Service Priority (TSP).

                      50.1.10.9  U S WEST shall identify any special
                                 operator-assisted calling requirements to
                                 support 911.

                      50.1.10.10 Trunking shall be arranged to minimize the
                                 likelihood of central office isolation due to
                                 cable cuts or other equipment failures. There
                                 will be an alternate means of transmitting a
                                 911 call to a PSAP in the event of failures.

                      50.1.10.11 Circuits shall have interoffice, loop and
                                 carrier system diversity when such diversity
                                 can be achieved using existing facilities.
                                 Circuits will be divided as equally as possible
                                 across available carrier systems. Diversity
                                 will be maintained or upgraded to utilize the
                                 highest level of diversity available in the
                                 network.

                      50-1.10.12 Equipment and circuits used for 911 shall be
                                 monitored at all times. Monitoring of circuits
                                 shall be done to the individual circuit level.

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                                 Monitoring shall be conducted by U S WEST for
                                 trunks between the tandem and all associated
                                 PSAPs.

                      50-1.10.13 Repair service shall begin immediately upon
                                 receipt of a report of a malfunction. Repair
                                 service includes testing and diagnostic service
                                 from a remote location, dispatch of or
                                 in-person visit(s) of personnel. Technicians
                                 will be dispatched without delay.

                      50.1.10.14 All 911 trunks must adhere to the Americans
                                 with Disabilities Act requirements.

                      50.1.10.15 The Parties will cooperate in the routing of
                                 911 traffic in those instances where the
                                 ALI/ANI information is not available on a
                                 particular 911 call.

                      50.1.10.16 Pac-West is responsible for network management
                                 of its network components in compliance with
                                 the Network Reliability Council Recommendations
                                 and meeting the network standard of U S WEST
                                 for the 911 call delivery.

               50.1.11        Basic 911 and E911 Additional Requirements

                      50.1.11.1  All Pac-West lines that have been ported via
                                 INP shall reach the correct PSAP when 911 is
                                 dialed. US WEST shall send both the ported
                                 number and the Pac-West number (if both are
                                 received from Pac-West). The PSAP attendant
                                 shall see both numbers where the PSAP is using
                                 a standard ALI display screen and the PSAP
                                 extracts both numbers from the data that is
                                 sent.

                      50.1.11.2  U S WEST shall work with the appropriate
                                 government agency to provide Pac-West the
                                 ten-digit POTS number of each PSAP which
                                 sub-tends each U S WEST E911 Tandem to which
                                 Pac-West is interconnected.

                      50.1-11.3  U S WEST will provide Pac-West with the
                                 ten-digit telephone numbers of each PSAP
                                 agency, for which U S WEST provides the 911
                                 function, to be used by Pac-West operators for
                                 handling emergency calls in those instances
                                 where the Pac-West Customer dials "0" instead
                                 of "91 1."

                      50.1.11.4  Pac-West will provide U S WEST with the
                                 ten-digit telephone numbers of each PSAP
                                 agency, for which Pac-West provides the 911
                                 function, to be used by U S WEST operators for
                                 handling emergency calls in those instances
                                 where the U S WEST Customer dials "0" instead
                                 of "91 1."

                      50-1.11.5  U S WEST shall notify Pac-West forty-eight (48)
                                 hours in advance of any scheduled testing or
                                 maintenance affecting Pac-West 911 service, and
                                 provide notification as soon as possible of any
                                 unscheduled outage affecting Pac-West 911
                                 service.

                      50.1.11.6  Pac-West shall be responsible for reporting all
                                 errors, defects and malfunctions to U S WEST.
                                 U S WEST shall provide Pac-West with the point
                                 of contact for reporting errors, defects, and
                                 malfunctions in the service and shall also
                                 provide escalation contacts.

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               50.1.11.7  Pac-West may enter into subcontracts with third
                          parties, including Pac-West affiliates, for the
                          performance of any of Pac-West duties and obligations
                          stated herein.

               50.1.11.8  U S WEST shall provide sufficient planning information
                          regarding anticipated moves to SS7 signaling for the
                          next twelve (12) months.

               50.1.11.9  U S WEST shall provide notification of any pending
                          tandem moves, EPA splits, or scheduled maintenance
                          outages, with enough time to react.

               50.1.11.10 U S WEST shall provide "reverse ALI" inquiries by
                          public safety entities, consistent with U S WEST's
                          practices and procedures.

               50.1.11.11 U S WEST shall manage NPA splits by populating the ALI
                          database with the appropriate new NPA codes,
                          consistent with U S WEST's practices and procedures
                          for resold services.

               50.1.11.12 U S WEST must provide the ability for Pac-West to
                          update 911 database with end user information for
                          lines that have been ported via INP or NP.

               50.1.11.13 The data in the ALI database shall be managed by U S
                          WEST but is the property of U S WEST and all
                          participating telephone companies.

        50.1.12 Performance Criteria. E-91 1 Database accuracy shall be as set
                forth below:

               50.1.12.1  Accuracy of ALI (Automatic Location Identification)
                          data submitted by Pac-West to U S WEST will be
                          measured jointly by the PSAPs and U S WEST. All such
                          reports shall be forwarded to Pac-West by U S WEST and
                          will indicate incidents when incorrect or no ALI data
                          is displayed. A report regarding any inaccuracy shall
                          be prepared by U S WEST.

               50.1.12.2  Each discrepancy report will be jointly researched by
                          U S WEST and Pac-West. Corrective action will be taken
                          immediately by the responsible party.

               50.1.12.3  Each party will be responsible for the accuracy of the
                          Customer records it provides.

50.2    Directory Assistance Service

        50.2.1 U S WEST shall provide for the routing of directory assistance
               calls (including, but not limited to, 411, 555-1212,
               NPA-555-1212) dialed by Pac-West Customers directly to either the
               Pac-West Directory Assistance service platform or U S WEST
               Directory Assistance service platform as specified by Pac-West.

        50.2.2 Pac-West Customers shall be provided the capability by U S WEST
               to dial the same telephone numbers for access to Pac-West
               Directory Assistance that U S WEST Customers use to access U S
               WEST Directory Assistance.

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<PAGE>

               50.2.3 U S WEST shall provide Directory Assistance functions and
                      services to Pac-West for its Customers as described below
                      until, at Pac-West's discretion, U S WEST routes calls to
                      the Pac-West Directory Assistance Services platform.

                      50.2.3.1   U S WEST agrees to provide Pac-West Customers
                                 with the same Directory Assistance service
                                 available to U S WEST Customers.

                      50.2.3.2   US WEST shall notify Pac-West in advance of any
                                 changes or enhancements to its Directory
                                 Assistance service, and shall make available
                                 such service enhancements on a
                                 non-discriminatory basis to Pac-West.

                      50.2.3.3   U S WEST shall provide Directory Assistance to
                                 Pac-West Customers in accordance with U S
                                 WEST's internal operating procedures and
                                 standards, which shall, at a minimum, comply
                                 with accepted professional and industry
                                 standards.

                      50.2.3.4   U S WEST shall provide Pac-West with the same
                                 level of support for the provisioning of
                                 Directory Assistance as U S WEST provides
                                 itself.

                      50.2.3.5   Service levels shall comply, at a minimum, with
                                 Commission requirements for Directory
                                 Assistance.

                      50.2.3.6   U S WEST agrees to maintain an adequate
                                 operator work force based on a review and
                                 analysis of actual call attempts and
                                 abandonment rate.

                      50.2.3.7   Subject to the applicable provisions of the
                                 applicable collective U S WEST bargaining
                                 agreements, Pac-West shall be permitted to
                                 participate in all call monitoring activities
                                 available to U S WEST and to remote call
                                 monitor as customarily practiced by the
                                 outsource customers of call centers.(35)

                      50.2.3.8   U S WEST shall provide the following minimum
                                 Directory Assistance capabilities to Pac-West
                                 Customers:

                                 (a)   A maximum of two (2) Customer listings
                                       and/or addresses or U S WEST parity per
                                       Pac-West Customer request.

                                 (b)   Name and address to Pac-West Customers
                                       upon request except for unlisted numbers,
                                       in the same states where such information
                                       is provided to U S WEST Customers.

                                 (c)   For Pac-West customers who are served
                                       exclusively through resold U S WEST
                                       retail services, Pac-West may resell U S
                                       WEST's Directory Assistance call
                                       completion services to the extent U S
                                       WEST offers call Directory Assistance
                                       completion to its own end users. For
                                       Pac-West customers who are served from an
                                       Pac-West switch, Pac-West may request
                                       Directory Assistance call completion
                                       services through the BFR process Such BFR
                                       process shall address the identification
                                       of the Pac-West end user at the U S WEST
                                       Directory Assistance platform

----------

35      Arizona Bench Order, May 29, 1997 Hearing, pp. 1613-1614.

                                       68
<PAGE>

                               for purposes of routing and billing of intraLATA
                               and interLATA toll calls.

                          (d)  The U S WEST mechanized interface with the U S
                               WEST subscriber listing database is not available
                               for Pac-West as of the Effective Date of this
                               Agreement. When the mechanized interface is
                               available, U S WEST will populate the Directory
                               Assistance Database in the same manner and in the
                               same time frame as for U S WEST Customers.

                          (e)  Any information provided by a Directory
                               Assistance Automatic Response Unit (ARU) shall be
                               repeated the same number of times for Pac-West
                               Customers as for U S WEST Customers.

                          (f)  When an Pac-West Customer served on a resale or
                               unbundled switching basis requests a U S WEST
                               directory assistance operator to provide instant
                               credit on a directory assistance call, the U S
                               WEST directory assistance operator shall inform
                               the Pac-West Customer to call an 800 number for
                               Pac-West Customer service to request a credit.
                               The accurate identification of Pac-West as the
                               customer's local service provider by the U S WEST
                               directory assistance operator requires the use of
                               separate Pac-West trunks to the Directory
                               Assistance Platform.

               50-2.3.9   For resold lines and unbundled switching, U S WEST
                          shall provide data regarding billable events as
                          requested by Pac-West.

               50.2.3.10  U S WEST agrees to (a) provide to Pac-West operators,
                          on line access to U S WEST's directory assistance
                          database equivalent to the access provided to U S WEST
                          operators; (b) allow Pac-West or an Pac-West
                          designated operator bureau to license U S WEST's
                          subscriber listings database on terms and conditions
                          equivalent to the terms and conditions upon which U S
                          WEST utilizes such databases; and (c) in conjunction
                          with branded or unbranded directory assistance
                          services pursuant to Section 8 of this Part A, provide
                          caller-optional directory assistance call completion
                          service which is comparable in every way to the
                          directory assistance call completion service U S WEST
                          makes available to its own users. Pac-West may, at its
                          option, request U S WEST not to provide call
                          completion services to Pac-West.

               50.2.3.11  In addition to charges for directory assistance, when
                          call completion for an intraLATA toll call is
                          requested, the applicable charge for the completion of
                          such intraLATA toll call will apply.

50.3    Operator Services

        50.3.1 U S WEST shall provide, for the routing of local Operator
               Services calls (including, but not limited to, 0+, 0-) dialed by
               Pac-West Customers directly to either the Pac-West operator
               service platform or U S WEST operator service platform as
               specified by Pac-West

                                       69
<PAGE>

          50.3.2    Pac-West Customers shall be provided the capability by U S
                    WEST to dial the same telephone numbers to access Pac-West
                    operator service that U S WEST Customers dial to access U S
                    WEST operator service.

          50.3.3    U S WEST shall provide Operator Services to Pac-West as
                    described below until, at Pac-West' s discretion, U S WEST
                    routes calls to the Pac-West local Operator Services
                    platform.

                    50.3.3.1  U S WEST agrees to provide Pac-West Customers the
                              same Operator Services available to U S WEST
                              Customers. U S WEST shall make available its
                              service enhancements on a non-discriminatory
                              basis.

                    50.3.3.2  U S WEST shall provide the following minimum
                              Operator Service capabilities to Pac-West
                              Customers:

                         (a)  U S WEST shall complete 0+ and 0- dialed local
                              calls, including O-Coin, Automatic Coin Telephone
                              Service (ACTS) and the completion of coin calls,
                              the collection of coins, and the provision of coin
                              rates.

                         (b)  U S WEST shall complete 0+ intraLATA and, when
                              offered, interLATA toll calls. The Parties will
                              cooperate to develop industry standards to include
                              the end user's PIC in operator services signaling
                              and the development of associated routing
                              procedures.

                         (c)  U S WEST shall complete calls for Pac-West's
                              Customers that are billed to calling cards and
                              other commercial cards on the same basis as
                              provided to U S WEST own customers and Pac-West
                              shall designate to U S WEST the acceptable types
                              of special billing.

                         (d)  U S WEST shall complete person-to-person calls.

                         (e)  U S WEST shall complete collect calls.

                         (f)  U S WEST shall provide the capability for callers
                              to bill to a third party and complete such calls.

                         (g)  U S WEST shall complete station-to-station calls.

                         (h)  U S WEST shall process emergency calls.

                         (i)  US WEST shall process Busy Line Verify and Busy
                              Line Interrupt requests.

                         (j)  U S WEST shall process emergency call trace in
                              accordance with its normal and customary
                              procedures.

                         (k)  U S WEST shall process operator-assisted directory
                              assistance calls.

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<PAGE>

                   (l)  U S WEST operators shall provide Pac-West Customers with
                        long distance rate quotes to the extent U S WEST
                        provides such rate quotes to its own end users. Based on
                        technology available as of the Effective Date of this
                        Agreement, the provision of rate quotes to Pac-West
                        Customers requires a separate Pac-West trunk group to
                        the U S WEST operator services platform to identify the
                        caller as an Pac-West Customer.

                   (m)  U S WEST operators shall provide Pac-West Customers with
                        time and charges to the extent U S WEST provides such
                        time and charges to its own end users. Based on
                        technology available as of the Effective Date of this
                        Agreement, the provision of time and charges to Pac-West
                        Customers requires a separate Pac-West trunk group to
                        the U S WEST operator services platform to identify the
                        caller as an Pac-West Customer.

                   (n) U S WEST shall route 0- traffic to a "live" operator
                       team.

                   (o)(36) At the election of Pac-West, when an Pac-West
                           Customer requests a U S WEST operator to provide
                           instant credit on an Operator Services call, the U S
                           WEST operator shall either inform the Pac-West
                           Customer that a credit will be granted, or shall
                           inform the Pac-West Customer to call a toll free
                           number for Pac-West Customer service to request a
                           credit. U S WEST shall provide one (1) toll free
                           number for business Customers and another for
                           residential Customers.

                          (i)    For resold Operator Services, U S WEST shall
                                 credit the Pac-West account in accordance with
                                 the same credit procedures which are applied to
                                 U S WEST's own retail customers;

                          (ii)   For Operator Services offered as an unbundled
                                 Network Element, U S WEST shall credit the
                                 Pac-West account for 50 percent of the charges,
                                 except where a greater credit is required by
                                 the Commission's service quality rules and
                                 regulations.

                   (p)  U S WEST shall provide caller assistance for the
                        disabled in the same manner as provided to U S WEST
                        Customers.

                   (q)  When available to U S WEST end users, U S WEST shall
                        provide operator-assisted conference calling to
                        Pac-West.

     50-3.3    US WEST shall exercise at least the same level of fraud control
               in providing Operator Service to Pac-West that U S WEST provides
               for its own operator service, where the Pac-West fraud control
               data is in U S WEST's LIDB database.

     50-3.4    U S WEST shall perform billed number screening when handling
               collect, third party, and calling card calls, both for station to
               station and person to person call types.

----------

36      Procedural Order, July 14,1997, page 11-12.

                                       71
<PAGE>

     50.3.5    Subject to the applicable provisions of the applicable collective
               U S WEST bargaining agreements, Pac-West shall be permitted to
               participate in all call monitoring activities available to U S
               WEST and to remote call monitor as customarily practiced by the
               outsource customers of call centers.(37)

     50.3.6    U S WEST shall direct Customer account and other similar
               inquiries to the Customer service center designated by Pac-West

     50.3.7    U S WEST shall provide an electronic feed of Customer call
               records in "EMR" format to Pac-West in accordance with the time
               schedule mutually agreed between the Parties.

     50.3.8    U S WEST shall update the Line Information Data Base ("LIDB") for
               Pac-West Customers. Additionally, U S WEST must provide access to
               LIDB for validation of collect, third party billed, and LEG card
               billed calls.

     50.3.9    Where INP is deployed and when a BLV/BLI request for a ported
               number is directed to a U S WEST operator and the query is not
               successful (i.e., the request yields an abnormal result),
               Pac-West may request, through the BFR process, that the operator
               confirm whether the number has been ported and direct the request
               to the appropriate operator.

     50.3.10   U S WEST shall allow Pac-West to order provisioning of Telephone
               Line Number ("TLN") calling cards and BNS,, in its LIDB, for
               ported numbers, as specified by Pac-West. U S WEST shall continue
               to allow Pac-West access to its LIDB.

     50.3.11   Toll and Assistance ("T/A") refers to functions Customers
               associate with the "0" operator. Subject to availability and
               capacity, access may be provided via operator services trunks
               purchased from U S WEST or provided by Pac-West via collocation
               arrangements to route calls to Pac-West's platform.

     50.3.12   Automated Branding - ability to announce the carrier's name to
               the Customer during the introduction of the call.

     50.3.13   Interconnection to the U S WEST Toll and Assistance Operator
               Services from an end office to U S WEST T/A is technically
               feasible at least at three (3) distinct points on the trunk side
               of the switch. The first connection point is an operator services
               trunk connected directly to the T/A host switch. The second
               connection point is an operator services trunk connected directly
               to a remote T/A switch. The third connection point is an operator
               services trunk connected to a remote access tandem with operator
               concentration capabilities.

     50.3.14   All trunk interconnections will be digital.

     50.3.15   The technical requirements of operator services type trunks and
               the circuits to connect the operator positions to the host are
               covered in the Operator Services Switching Generic Requirements
               ("OSSGR") Bellcore Document number FR-NWT000271.

----------

37      Arizona Bench Order, May 29,1997 Hearing, p. 1617.

                                       72
<PAGE>

       50.3.16 Busy Line Verify and Interrupt

               50.3.16.1 At the request of Pac-West operators or Customers, U S
                         WEST operators will perform Busy Line Verify ("BLV")
                         and/or Busy Line Interrupt ("BLI") operations where
                         such capacity exists.

               50.3.16.2 When possible and where consistent with the service U S
                         WEST provides to its own Customers and/or end users, U
                         S WEST shall engineer its BLV/BLI facilities to
                         accommodate the anticipated volume of BLV/BLI requests
                         during the busy hour. Pac-West may, from time to time,
                         provide its anticipated volume of BLV/BLI requests to U
                         S WEST. In those instances when failures occur to
                         significant portions of the BLV/BLI systems and
                         databases and those systems and databases become
                         unavailable, U S WEST shall promptly Inform Pac-West.

               50.3.16.3 BLV is performed when one Party's Customer requests
                         assistance from the other Party's operator or operator
                         bureau to determine if the called line is in use;
                         provided, however, that the operator bureau will not
                         complete the call for the Customer initiating the BLV
                         inquiry. Only one (1) BLV attempt will be made per
                         Customer operator bureau call, and a charge shall apply
                         whether or not the called party releases the line.

               50.3.16.4 BLI is performed when one Party's Customer requests
                         assistance from the other Party's operator bureau to
                         interrupt a telephone call in progress after BLV has
                         occurred. The operator bureau will interrupt the busy
                         line and inform the called party that there is a call
                         waiting. The operator bureau will only interrupt the
                         call and will not complete the telephone call of the
                         Customer initiating the BLI request. The operator
                         bureau will make only one (1) BLI attempt per Customer
                         operator telephone call and the applicable charge
                         applies whether or not the called party releases the
                         line.

               50.3,16.5 Each Party's operator bureau shall accept BLV and BLI
                         inquiries from the operator bureau of the other Party
                         in order to allow transparent provision of BLV/ BLI
                         traffic between the Parties' networks.

               50.3.16.6 Each Party shall route BLV/BLI Traffic inquiries over
                         direct trunks between the Parties' respective operator
                         bureaus. Unless otherwise mutually agreed, the Parties
                         shall configure BLV/BLI trunks over the lnterconnection
                         architecture defined in Attachment 4 to this Agreement

50.4    Directory Assistance and Listings Service Requests

        50.4.1 These requirements pertain to U S WEST's Directory Assistance and
               Listings Service Request process that enables Pac-West to (a)
               submit Pac-West Customer information for inclusion in U S WEST
               Directory Assistance and Directory Listings databases; (b) submit
               Pac-West Customer information for inclusion in published
               directories; and (c) provide Pac-West Customer delivery address
               information to enable U S WEST to fulfill directory distribution
               obligations.

               50.4.1.1   [Intentionally left blank for numbering consistency]

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<PAGE>

          50.4.1.2  U S WEST will accept the following Directory Listing
                    Migration Orders from Pac-West, valid under all access
                    methods, including, but not limited to, Resale, Unbundled
                    Network Elements and Facilities-Based, and will process the
                    orders in a mechanized format:

                    (a)  Migrate with no Changes: Maintain all directory
                         listings for the Customer in both Directory Assistance
                         and Directory Listing. Transfer ownership and billing
                         for listings to Pac-West.

                    (b)  Migrate with Additions: Maintain all directory listings
                         for the Customer in both Directory Assistance and
                         Directory Listing. Incorporate the specified additional
                         listings order. Transfer ownership and billing for the
                         listings to Pac-West.

                    (c)  Migrate with Deletions: Maintain all directory listings
                         for the Customer in both Directory Assistance and
                         Directory Listing. Delete the specified listings from
                         the listing order. Transfer ownership and billing for
                         the listings to Pac-West.

          50.4.1.3  The Directory Listings Migration Options should not be tied
                    to migration options specified for a related service order
                    (if any) such that a service order specified as migration
                    with changes may be submitted along with a directory listing
                    order specified as migration with no changes.

          50.4.1.4  U S WEST shall enable Pac-West to electronically transmit
                    multi-line listing orders.

          50.4.1.5  U S WEST agrees to work cooperatively with Pac-West to
                    define specifications for, and implement a daily summary
                    report of, Directory Service Requests. The summary
                    information will include, but is not limited to, the
                    following information:

                    (a)  White page listings text and format (name, address,
                         phone, title, designation, extra line requirements

                    (b)  Listing Instruction codes

          50.4.1.6  To ensure accurate order processing, U S WEST shall provide
                    to Pac-West the following information, with updates within
                    one (1) Business Day of change and via electronic exchange:

                    (a)  A matrix of NXX to central office
                    (b)  Geographical maps, if available, of U S WEST service
                         area
                    (c)  A description of calling areas covered by each
                         directory, including, but not limited to, maps of
                         calling areas and matrices depicting calling privileges
                         within and between calling areas
                    (d)  Listing format rules
                    (e)  Listing alphabetizing rules
                    (f)  Standard abbreviations acceptable for use in listings
                         and addresses
                    (g)  Titles and designations

                                       74
<PAGE>

                       50.4.1.7  Based on changes submitted by Pac-West U S WEST
                                 shall update and maintain Directory Assistance
                                 and Directory Listings data for Pac-West
                                 Customers who:

                                   (a)  Disconnect Service
                                   (b)  Change carrier
                                   (c)  Install Service
                                   (d)  Change any service which affects
                                        Directory Assistance information
                                   (e)  Specify Non-Solicitation
                                   (f)  Are Non-Published, Non-Listed, or Listed

                      50.4.1.8   U S WEST shall not charge for storage of
                                 Pac-West Customer information in the Directory
                                 Assistance and Directory Listing systems.

                      50.4.1.9   Pac-West shall not charge for storage of U S
                                 WEST Customer information in the Directory
                                 Assistance and Directory Listing systems.

        50.5   Directory Assistance Data

               50.5.1 This Section refers to the residential, business, and
                      government Customer records used by U S WEST to create and
                      maintain databases for the provision of live or automated
                      operator assisted Directory Assistance. Directory
                      Assistance data is information that enables telephone
                      exchange carriers to swiftly and accurately respond to
                      requests for directory information, including, but not
                      limited to, name, address and phone numbers. Under the
                      provisions of the Act and the FCC's Interconnection Order,
                      U S WEST shall provide unbundled and non-discriminatory
                      access to the residential, business and government
                      Customer records used by U S WEST to create and maintain
                      databases for the provision of live or automated operator
                      assisted Directory Assistance. Pac-West may combine this
                      element with any other Network Element for the provision
                      of any Telecommunications Service.(38)

               50.5.2 U S WEST shall provide an initial load of Customer records
                      and Customer list information to Pac-West, in a
                      mutually-agreed-to format, via electronic transfer, within
                      thirty (30) calendar days of the Effective Date of this
                      Agreement The initial load shall include all data resident
                      in the U S WEST Databases and/or systems used by U S WEST
                      for housing Directory Assistance data and/or Customer
                      listing data. In addition, the initial load shall be
                      current as of the prior Business Day on which the initial
                      load is provided.

               50.5.3 U S WEST shall provide Pac-West daily updates to the
                      Customer records and Customer list information in a
                      mutually-agreed-to format via electronic transfer.

               50.5.4 U S WEST shall provide the ability for Pac-West to
                      electronically query the U S WEST Directory Assistance
                      Database and listings Database in a manner at least
                      consistent with and equal to that which U S WEST provides
                      to itself or any other Person.

               50.5.5 U S WEST shall provide Pac-West a complete list of ILECs,
                      CLECs, and independent telephone companies that provided
                      data contained in the database.

----------

38      MCIm Order, p.1 1, Issue 14; Pac-West Order, p. 13, Issue 25.

                                       75
<PAGE>

               50.5.6 On a daily basis, U S WEST shall provide updates (end user
                      and mass) to the listing information via electronic data
                      transfer. Updates shall be current as of one (1) Business
                      Day prior to the date provided to Pac-West.

               50.5.7 U S WEST shall provide Pac-West access to Directory
                      Assistance support databases. For example, Pac-West
                      requires access to use restriction information including,
                      but not limited to, call completion.

               50.5.8 Directory Assistance data shall specify whether the
                      Customer is a residential, business, or government
                      Customer.

               50.5.9 Directory Assistance data shall be provided on the same
                      terms, conditions, and rates that U S WEST provides such
                      data to itself or other third parties.

               50.5.10 U S WEST shall provide complete refresh of the Directory
                       Assistance data upon request by Pac-West.

               50.5.11 U S WEST and Pac-West will cooperate in the designation
                       of a location at which the data will be provided.

51.     Unused Transmission Media(39)

        51.1   Definitions

               51.1.1 Unused Transmission Media is physical inter-office
                      transmission media (e.g., optical fiber, copper twisted
                      pairs, coaxial cable) which have no lightwave or
                      electronic transmission equipment terminated to such media
                      to operationalize transmission capabilities.

               51.1.2 Dark fiber is excess fiber optic cable which has been
                      placed in a network and is not currently being lit by
                      electronics from any carrier. Dark Fiber, one type of
                      Unused Transmission Media, is unused strands of optical
                      fiber. Dark Fiber also includes strands of optical fiber
                      which may or may not have lightwave repeater (regenerator
                      or optical amplifier) equipment interspliced, but which
                      has no line terminating facilities terminated to such
                      strands. Unused Transmission Media also includes unused
                      wavelengths within a fiber strand for purposes of coarse
                      or dense wavelength division multiplexed (WDM)
                      applications. Typical single wavelength transmission
                      involves propagation of optical signals at single
                      wavelengths (1.3 or 1.55 micron wavelengths). In WDM
                      applications, a WDM device is used to combine optical
                      signals at different wavelengths on to a single fiber
                      strand. The combined signal is then transported over the
                      fiber strand. For coarse WDM applications, one (1) signal
                      each at 1.3 micron and 1.55 micron wavelength are
                      combined. For dense WDM applications, many signals in the
                      vicinity of 1.3 micron wavelength and/or 1.55 micron
                      wavelength are combined.

        51.2   While U S WEST is not required to provide Unused Transmission
               Media, other than Dark Fiber,(40) Pac-West may, subject to the
               agreement of U S WEST, lease copper twisted pairs, coaxial cable
               or other Unused Transmission Media.

----------

39      All bolded language in this Section is included per MCIm Order, pp. 8-9
        at Issue 9c and Pac-West Order Issue 22.

40      MCIm Order, pp. 8-9 at Issue 9c and AT&T Order Issue 22.

                                       76
<PAGE>

51.3    Requirements

          51.3.1 Subject to Section 51.2 above, U S WEST shall make available
                 Unused Transmission Media to Pac-West under a lease agreement
                 or other arrangement.

          51.3.2 U S WEST shall provide a single point of contact for
                 negotiating all Unused Transmission Media use arrangements.

          51.3.3 Pac-West may test the quality of the Unused Transmission Media
                 to confirm its usability and performance specifications.

          51.3.4 Where Unused Transmission Media is required to be offered or is
                 agreed to be offered by U S WEST, U S WEST shall provide to
                 Pac-West information regarding the location, availability and
                 performance of Unused Transmission Media within ten (10)
                 Business Days for a records based answer and twenty (20)
                 Business Days for a field based answer, after receiving a
                 request from Pac-West ("Request"). Within such time period, U S
                 WEST shall send written or electronic confirmation or any other
                 method of notification agreed to by the Parties of availability
                 of the Unused Transmission Media ("Confirmation").

          51.3.5 Where Unused Transmission Media is required to be offered or is
                 agreed to be offered by U S WEST, U S WEST shall make Unused
                 Transmission Media available for Pac-West's use in accordance
                 with the terms of this Section 51 within twenty (20) Business
                 Days or a reasonable time frame consistent with industry
                 standards after it receives written acceptance from Pac-West
                 that the Unused Transmission Media is wanted for use by
                 Pac-West. Splicing of Pac-West fiber may be performed at the
                 same points that are available for U S WEST splices.

     51.4 Requirements Specific to Dark Fiber

          51.4.1 Pac-West may test Dark Fiber leased from U S WEST using
                 Pac-West or Pac-West designated personnel subject to Section
                 51.2. U S WEST shall provide appropriate interfaces to allow
                 testing of Dark Fiber. U S WEST shall provide an excess cable
                 length of twenty-five (25) feet minimum, where available, for
                 fiber in underground conduit. U S WEST shall provide splicing
                 of Pac-West fiber to U S WEST Dark Fiber under normal
                 circumstances (e.g., no construction) in metropolitan areas
                 within seventeen (17) calendar days of Pac-West's request, and
                 within thirty (30) calendar days of a request in a
                 non-metropolitan area. Pac-West may request expedited splicing,
                 which shall be subject to available U S WEST resources.

          51.4.2 For WDM applications, U S WEST shall provide to Pac-West an
                 interface to an existing WDM device or allow Pac-West to
                 install its own WDM device (where sufficient system loss
                 margins exist or where Pac-West provides the necessary loss
                 compensation) to multiplex the traffic at different
                 wavelengths. This applies to both the transmit and receive ends
                 of the Dark Fiber.

     51.5 U S WEST may not reserve future capacity of its Dark Fiber for its own
          use, with the exception of maintenance or emergency spare.
          Maintenance and emergency spare also will be for the benefit of
          any CLEC which has leased dark fiber from U S WEST. Fiber which U S
          WEST has included as part of its local service rate base, and upon

                                       77
<PAGE>

             which it receives a rate of return, but which is used for other
             than local service will be subject to reclaim by CLECs in support
             of their provisioning of local service."

     51.6    Portions of the bandwidth of the fiber may be sectioned and
             Pac-West may share the bandwidth with U S WEST and other CLECs.

     51.7    The fiber should be used efficiently and to a reasonable level of
             capacity. Pac-West's Request to lease Dark Fiber must establish
             that another Network Element of comparable expense cannot satisfy
             Pac-West's needs. At its discretion, Pac-West may share fiber
             capacity with other parties, and such shared-use may justify
             Pac-West's need for the fiber.

     51.8    U S WEST may revoke the lease or other use arrangement and reclaim
             its fiber or bandwidth with twelve (12) months notice to Pac-West,
             if U S WEST can establish that the fiber is necessary to meet its
             bandwidth requirements or those of another -requesting CLEC,
             provided that the original CLEC's transportation is provided for by
             alternative means and at comparable prices and quality. The
             conversion to the alternative means shall be at the expense of the
             new user of the Dark Fiber, whether that be U S WEST or another
             CLEC. One of the alternatives means to be considered by U S WEST
             will be the sharing of bandwidth.

     51.9    If Pac-West obtains access to U S WEST's Dark Fiber, Pac-West shall
             make its Dark Fiber available to U S WEST on a comparable and
             reciprocal basis. This Section 51.9 shall not take effect until
             CLECs (other than wireless CLECs) operating within U S WEST's
             Arizona service territory provide service to at least 200,000
             access lines.

52.    Service Standards(42)

       U S WEST will provide all Local Resale, Ancillary Functions, Network
       Elements or Combinations in accordance with service standards,
       measurements, and performance requirements that are expressly specified
       in this Agreement and Attachment 5 hereto. In cases where such
       performance standards are not expressly specified, U S WEST will provide
       all Local Resale, Ancillary Functions, Network Elements or Combinations
       in accordance with performance standards which are at least equal to the
       level of performance standards and/or quality of service that U S WEST
       provides to itself, its Affiliates, to other CLECs, or other quality of
       service requirements imposed by the Commission, whichever is higher, in
       providing Local Resale, Ancillary Functions, Network Elements or
       Combinations to itself, to its end-users or to its Affiliates. If
       Pac-West requests a higher level of service than that provided by U S
       WEST to itself, Pac-West shall make the request pursuant to the BFR
       process.

       52.1    Definitions

               Pending adoption of service standards rules by the Commission,
               the following interim provisions shall apply.

               52.1.1 "Specified Performance Commitment" means the commitment by
                      U S WEST to meet the Performance Criteria for any
                      Specified Activity during the Specified Review Period. The
                      Specified Review Period shall be the same period as U S
                      WEST provides itself for existing Performance Criteria and
                      shall

----------

41      Procedural Order, July 14, 1997 at pages 12-13.
42      Section added per MCIm Order, p. 17 at Issue 28 and AT&T Order, p. 20
        at Issues 36, 73, and 74.

                                       78
<PAGE>

               be ninety (90) days for new Performance Criteria. The standard of
               performance for each of the measurements of performance in
               Arizona shall be the quality of service which U S WEST provides
               in Arizona to either itself, its ten largest end user Customers
               in the aggregate, independent LECs in the aggregate, other CLECs
               in the aggregate, or other quality of service requirements
               imposed by the Commission, whichever is highest. Neither
               performance penalties nor credits will be imposed for failure to
               comply with service standards.

        52.1.2 "Specified Activity" includes, but is not limited to, the
               following activities:

                 (a)  Installation Activities - apply to resold services,
                      unbundled loops, unbundled switching, and interim number
                      portability:

                      (i)   Installation Intervals Offered (measured from
                            application date to original due date);

                      (ii)  Installation Commitments Met;

                      (iii) Installation Reports within seven (7) days (percent
                            of reports per total of new, to or change orders).

                 (b)  Repair Activities - apply to resold service, unbundled
                      loops, unbundled switching, and interim number
                      portability:

                      (i)   Out of Service Cleared in Less than Twenty-four (24)
                            Hours (percent of total out of service reports);

                      (ii)  Report Rate per 100 Access Lines;

                      (iii) Repair Commitments Met;

                      (iv)  Out of Service and Service Affecting Cleared in Less
                            than Forty eight (48) Hours;

                      (v)   Repair Repeat Reports within Thirty (30) Days
                            (Percent of Repeats per 100 Access Lines).

                 (c)  Trunking Activities - includes interconnection trunks:

                      (i)   Defects per One Million Calls (Dedicated
                            Facilities/Trunkside only).

        52.1.3 "Performance Criteria" means, with respect to a Specified Review
               Period (i.e., a calendar month or quarter), the performance by U
               S WEST for the specified activities for Pac-West will meet or
               exceed the average performance by U S WEST for each resold or
               unbundled Network element the total universe of for each
               Specified Activity.

     52.2    Failure to Meet the Performance Criteria

             If, during a Specified Review Period, U S WEST fails to meet the
             Performance Criteria, U S WEST will use its best efforts to meet
             the Performance Criteria for the next Specified Review Period. If
             U S WEST fails to meet the Performance Criteria for two

                                       79
<PAGE>

                (2) consecutive periods, the Parties agree, in good faith, to
                attempt to resolve such issues through negotiation or
                non-binding arbitration. This paragraph shall not be construed
                to waive either Party's right to seek legal or regulatory
                intervention as provided by state or federal law. Pac-West may
                seek regulatory or other legal relief including requests for
                specific performance of U S WEST's obligations under this
                Agreement.

        52.3    Limitations

                U S WEST's failure to meet or exceed any of the Performance
                Criteria cannot be as a result, directly or indirectly, of a
                Delaying Event. A "Delaying Event" means (a) a failure by
                Pac-West to perform any of its obligations set forth in this
                Agreement, (b) any delay, act or failure to act by a Customer,
                agent of subcontractor of Pac-West, or (c) any force majeure
                event. If a Delaying Event prevents U S WEST from performing a
                Specified Activity, then such Specified Activity shall be
                excluded from the calculation of U S WEST's compliance with the
                Performance Criteria.

        52.4    Records

                U S WEST shall maintain complete and accurate records, for the
                Specified Review Period, of its performance under this Agreement
                for each Specified Activity and its compliance with the
                Performance Criteria. U S WEST shall provide to Pac-West such
                records in a self-reporting format. The Parties agree that such
                records shall be deemed Proprietary Information.

        52.5    Cost Recovery

                U S WEST reserves the right to attempt to recover the costs, if
                any, associated with the creation of the above reports and
                standards through a future proceeding before a regulatory body.

        52.6   Pac-West and U S WEST acknowledge and understand that the
               performance and quality of service standards outlined in this
               Section may be supplanted or supplemented by the generic
               proceeding to be held by the Commission to determine permanent
               quality of service measurements/liquidated damages.(53)

53.     Entire Agreement

        53.1   This Agreement shall include the Attachments, Appendices and
               other documents referenced herein all of which are hereby
               incorporated by reference, and constitutes the entire agreement
               between the Parties and supersedes all prior oral or written
               agreements, representations, statements, negotiations,
               understandings, proposals and undertakings with respect to the
               subject matter hereof.

        53.2   If a provision contained in any U S WEST tariff conflicts with
               any provision of this Agreement the provision of this Agreement
               shall control, unless otherwise ordered by the FCC or the
               Commission.

----------

43      MCIm Order, p. 17 at Issue 28 and AT&T Order, p. 20 at Issues 36, 73, &
        74.

                                       80
<PAGE>

54.     Reservation of Rights

        54.1   The Parties acknowledge that the terms of this Agreement were
               established pursuant to an order of the Commission. Any or all of
               the terms of this Agreement may be altered or abrogated by a
               successful challenge to this Agreement (or the order approving
               this Agreement) as permitted by applicable law. By signing this
               Agreement, neither Party waives its right to pursue such a
               challenge.

        54.2   The Parties enter into this Agreement without prejudice to any
               position they may have taken previously, or may take in the
               future in any legislative, regulatory, or other public forum
               addressing any matters, including matters related to the types of
               arrangements prescribed by this Agreement.

        IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to be
executed by their respective duly authorized representatives.

Pac-West Telecomm, Inc.**                      U S WEST Communication Inc.**

/s/ John F. Sumpter                            /s/ Dennis Bayers
------------------------------                 ------------------------------
Signature                                      Signature

John F. Sumpter                                Dennis Bayers
------------------------------                 ------------------------------
Name Printed/Typed                             Name Printed/Typed

Vice President                                 Director
------------------------------                 ------------------------------
Title                                          Title

8/27/99                                        9/2/99
------------------------------                 ------------------------------
Date                                           Date

**       This Agreement is made pursuant to Section 252 (i) of the Act and is
premised upon the Interconnection Agreement between AT&T Communications of the
Mountain States, Inc. and U S WEST Communications, Inc. (the "AT&T Agreement").
The AT&T Agreement was approved by the Commission on July 31, 1997, and an
amendment thereto was approved on October 6, 1997.

With respect to this Agreement, the Parties understand and agree:

i)     The Parties shall request the Commission to expedite its review and
approval of this Agreement.

ii)    Notwithstanding the mutual commitments set forth herein, the Parties are
entering into this Agreement without prejudice to any positions they have taken
previously, or may take in the future, in any legislative, regulatory, or other
public forum addressing any matters, including those relating to the types of
arrangements contained in this Agreement. During the proceeding in which the
Commission is to review and approve the Agreement, U S WEST may point out that
it has objected, and continues to object, to the inclusion of the terms and
conditions to which it objected in the proceedings involving the approval of the
Underlying Agreement.

                                       81
<PAGE>

iv)    This Agreement contains provisions based upon the decisions and orders of
the FCC and the Commission under and with respect to the Act. Currently, court
and regulatory proceedings affecting the subject matter of this Agreement are in
various stages, including the proceedings where certain of the rules and
regulations of the FCC are being challenged. In addition, there is uncertainty
in the aftermath of the Supreme Court's decision in AT&T Corp, et al. v. Iowa
Utilities Board. Based on that uncertainty, and the regulatory and judicial
proceedings which will occur as a result of that decision, the Parties
acknowledge that this Agreement may need to be changed to reflect any changes in
law. The Agreement has not been corrected to reflect the requirements, claims or
outcomes of any of the Proceedings, although the pricing does reflect the
Commission's most current generic order, if any. Accordingly, when a final,
decision-or decisions are made in the Proceedings that automatically change and
modify the Underlying Agreement, then like changes and modifications will
similarly be made to this Agreement. In addition, to the extent rules or laws
are based on regulatory or judicial proceedings as a result of the recent
Supreme Court decision, this Agreement will be amended to incorporate such
changes.

v)     Subsequent to the execution of this Agreement, the FCC or the Commission
may issue decisions or orders that change or modify the rules and regulations
governing implementing of the Act. If such changes or modifications alter the
state of the law upon which the Underlying Agreement was negotiated and agreed,
and it reasonably appears that the parties to the Underlying Agreement would
have negotiated and agreed to different term(s) condition(s) or covenant(s) than
as contained in the Underlying Agreement had such change or modification been in
existence before execution of the Underlying Agreement, then this Agreement
shall be amended to reflect such different terms(s), condition(s), or
covenant(s). Where the parties fail to agree upon such an amendment, it shall be
resolved in accordance with the Dispute Resolution provision of this Agreement.

                                       82
<PAGE>

                                                                  Attachment 1

                               TABLE OF CONTENTS

 1. General Principles ...................................................1

 2. Resale Rates and Charges .............................................1

 3. Construction and Implementation Costs ................................2

 4. Unbundled Loops - Conditioning Charge ................................3

 5. Transport and Termination - Interim Prices ...........................3

 6. Number Portability ...................................................4

 7. Network Elements .....................................................5

 8. Rate Schedule ........................................................5
<PAGE>

                               RATES and CHARGES

1.       General Principles

         1.1      All rates provided under this Agreement shall remain in effect
                  for the term of this Agreement unless they are not in
                  accordance with all applicable provisions of the Act, the
                  rules and regulations of the FCC, or the Commission's rules
                  and regulations.

         1.2      Except as otherwise specified in this Agreement, as approved
                  or ordered by the Commission, or as agreed to by the Parties
                  through good faith negotiations, nothing in this Agreement
                  shall prevent a Party through the dispute resolution process
                  described in this Agreement from seeking to recover the costs
                  and expenses, if any, it may incur in (a) -complying with and
                  implementing its obligations under this Agreement, the Act,
                  and the rules, regulations and orders of the FCC and the
                  Commission, and (b) the development, modification, technical
                  installation and maintenance of any systems or other
                  infrastructure which it requires to comply with and to
                  continue complying with its responsibilities and obligations
                  under this Agreement.

2.       Resale Rates and Charges

         2.1(1)   The Customer Transfer Charge ("CTC") for resale customers
                  switching to PAC-WEST from U S WEST, and U S WEST's applicable
                  resale discount rates are set forth on Schedule 1 of this
                  Agreement

         2.2      Pac-West shall be permitted to demonstrate what its own cost
                  will be upon termination of a resale customer, so that amount
                  may be discounted from the CTC payable to U S WEST.

         2.3      If the resold services are purchased pursuant to tariffs and
                  the tariff rates change, charges billed to Pac-West for such
                  services will be based upon the new tariff rates less the
                  applicable wholesale discount as agreed to herein. The new
                  rate will be effective upon the tariff effective date.

         2.4      A Subscriber Line Charge (SLC) will continue to be paid by
                  Pac-West without discount for each local exchange line resold
                  under this Agreement. All federal and state rules and
                  regulations associated with SLC or as found in the applicable
                  tariffs also apply.

         2.5      Pac-West will pay to U S WEST the PIC change charge without
                  discount associated with Pac-West end user changes of
                  interexchange or intraLATA carriers.

         2.6      Pac-West agrees to pay U S WEST at the wholesale discount rate
                  when its end user activates any services or features that are
                  billed on a per use or per activation basis (e.g., continuous
                  redial, last call return, call back calling, call trace,
                  etc.). U S WEST shall provide Pac-West with detailed billing
                  information per applicable OBF standards unless otherwise
                  agreed to by the Parties as necessary to permit Pac-West to
                  bill its end users such charges.

----------

1     MCIm Order, p. 24 at Issue 41.
<PAGE>

         2.7      (Intentionally left blank for numbering consistency]

         2.8      Nonrecurring charges will be billed as approved by the
                  Commission.

         2.9      (Intentionally left blank for numbering consistency]

         2.10     Service quality credits will not be applicable as additional
                  resale discounts.(2)

         2.11     Resale prices shall be wholesale rates determined on the basis
                  of retail rates charged to subscribers for the
                  Telecommunications Service requested, excluding the portion
                  thereof attributable to any marketing, billing, collection and
                  other costs that will be avoided by U S WEST, as specified in
                  the Act, by the FCC and/or the Commission. U S WEST shall be
                  obligated to offer its volume and term discount service plans
                  to Pac-West provided that Pac-West complies with the volume
                  and term requirements contained therein. If selected by
                  Pac-West, an appropriate wholesale discount shall also be
                  applied to such plans. With the exception of the preceding,
                  Pac-West shall not be required to agree to volume or term
                  commitments as a condition for obtaining Local Service.(3)

         2.12     U S WEST shall bill Pac-West and Pac-West is responsible for
                  all applicable charges for Resale Services. Pac-West shall be
                  responsible for all charges associated with services that
                  Pac-West resells to an end user.

3.       Construction and Implementation Costs

         3.1      U S WEST may assess Pac-West up-front, nonrecurring charges
                  for construction costs associated with a service only if U S
                  WEST assesses its own end users such charges for similar
                  construction and also demonstrates to the Commission that it
                  is customary industry practice to charge end users for similar
                  costs. If a tariff exists, such charges are deemed to be a
                  customary industry practice. U S WEST shall not double recover
                  nonrecurring construction charges. If another CLEC or U S WEST
                  receives a benefit from the construction or other activity for
                  which Pac-West is charged, Pac-West is entitled to recover
                  contribution from the CLEC, or, if applicable, U S WEST as a
                  beneficiary, for a share of the costs.(4)

         3.2      [Intentionally left blank for numbering consistency]

         3.3      [Intentionally left blank for numbering consistency]

         3.4      A quote for the Pac-West portion of a specific job will be
                  provided to Pac-West. The quote will be in writing and will be
                  binding for ninety (90) days after the issue date. When

----------

2    MCIm Order, pp. 17-18 at Issue 28 and AT&T Order at Issue 36.
3    AT&T Order, p. 19 at Issue 33.
4    MCIm Order, pp. 23-24 at Issue 41 and AT&T Order at Issue 39.

                                       2
<PAGE>

                  accepted, Pac-West will be billed the quoted price and
                  construction will commence after receipt of payment. If
                  Pac-West chooses not to have U S WEST construct the
                  facilities, U S WEST reserves the right to bill Pac-West for
                  the expense incurred for producing the engineered job design.

         3.5      Pac-West shall make payment of fifty percent (50%) of the
                  nonrecurring charges and fees upon acceptance of the quotation
                  with the remainder due upon completion of the construction. In
                  the event that Pac-West disputes the amount of U S WEST's
                  proposed construction costs, Pac-West shall deposit fifty
                  percent (50%) of the quoted construction costs into an
                  interest bearing escrow account prior to the commencement of
                  construction. The remainder of the quoted construction costs
                  shall be deposited into the escrow account upon completion of
                  the construction. Upon resolution of the dispute, the escrow
                  agent shall distribute amounts in the account in accordance
                  with the resolution of such dispute, and any interest that has
                  accrued with respect to amounts in the account shall be
                  distributed proportionately to the Parties. The pendency of
                  any such dispute shall not affect the obligation of U S WEST
                  to complete the requested construction.

         3.6      Notwithstanding any provision contained in this Agreement to
                  the contrary, within ninety (90) days of the Effective Date of
                  this Agreement, the Parties shall negotiate a pricing schedule
                  for collocation enclosure buildouts.(5)

4.       Unbundled Loops - Conditioning Charge

         4.1      For loops that need conditioning, as requested by Pac-West, to
                  ensure the necessary transmission standard, conditioning
                  charges may apply so long as such charges are assessed to U S
                  WEST's similarly situated customers. If U S WEST normally
                  charges its customers an up-front fee, it may require Pac-West
                  to pay an up-front fee. If the fee for conditioning is built
                  into the monthly cost for its customers, however, the
                  conditioning costs shall be considered as part of the forward
                  looking economic cost of the upgraded loop.(6)

5.       Transport and Termination - Interim Prices

         5.1(7)   Pursuant to A.A.C. R14-2-1304, the Parties will utilize bill
                  and keep as a reciprocal compensation mechanism for a period
                  of twenty-four (24) months from the time of the Commission's
                  approval of the first interconnection agreement between U S
                  WEST and any CLEC (December 18, 1996). Unless permanent rates
                  have been established, upon termination of bill and keep,
                  interim rates shall apply. Either Party may seek an earlier
                  termination of the bill and keep mechanism if it is able to
                  prove to the Commission, based on six (6) consecutive months
                  of its traffic data, that traffic terminated by Pac-West and
                  US WEST is out of balance by more than ten (10)

----------

5 Procedural Order, July 14, 1997, page 24.
6 MCIm Order, pp. 27-28 and AT&T Order, p. 37.
7 MCIm Order, p. 28 and AT&T Order at Issue 88.

                                       3
<PAGE>

                  percent. Reciprocal compensation shall comply with the
                  Recommended Order on Consolidated Cost and Pricing
                  Arbitration, to be trued up upon approval of that Decision by
                  the Commission.(8)

                  5.1.1    At such time as bill and keep is terminated, and
                           permanent rates are established by the Commission, a
                           true-up for the regulatory lag may be ordered by the
                           Commission.

          5.2(9)  Pac-West shall receive fair compensation for the use of its
                  switch equivalent to that of U S WEST's switch beginning from
                  the date Pac-West enters an agreement granting access to the
                  facilities of Pac-West's long distance affiliate(s). Until
                  that time, Pac-West's switch shall be billed at the rates
                  equivalent to that of a U S WEST end office switch.

6.       Number Portability

         6.1      Pac-West and U S WEST shall provide remote call forwarding
                  functionality, or other INP capabilities, to each other at no
                  charge, in accordance with the provisions of the FCC's First
                  Report and Order and Further Notice of Proposed Rulemaking, CC
                  Docket No. 95-116 ("FCC Number Portability Order").

         6.2      The costs incurred by Pac-West and U S WEST of providing INP
                  shall be recovered through a broad-based cost recovery
                  mechanism, as described in the FCC Number Portability Order.
                  Costs shall be assessed in an annual surcharge based upon each
                  carrier's number of ported telephone numbers relative to the
                  total number of active telephone numbers in the local service
                  area, as discussed by the FCC in the FCC Number Portability
                  Order, at paragraph 16.

         6.3(10)  In respect to distribution of terminating charges in the
                  context of INP, such charges shall be distributed in a manner
                  consistent with meet-point billing arrangements. Accordingly,
                  there shall be no requirement that all of the terminating
                  interstate or intrastate access charges paid by IXCs on calls
                  forwarded as a result of number portability measures be paid
                  to either Pac-West or U S WEST. Pac-West and U S WEST shall
                  share in the access revenues received for a ported call. If U
                  S WEST or Pac-West is unable to identify the particular IXC
                  carrying a forwarded call for purposes of assessing access
                  charges, the forwarding carrier shall provide the terminating
                  carrier with the necessary information to permit the
                  terminating carrier to issue a bill. The Parties shall work
                  together to incorporate the results of the FCC Access Reform
                  Order when final.

         6.4      Pac-West may request U S WEST to provide Pac-West call detail
                  records identifying each IXC which are sufficient to allow
                  Pac-West to render bills to IXCs for calls IXCs place to

----------

8    Procedural Order, July 14, 1997, page 16.
9    MCIm Order, p. 26.
10   AT&T Order, p. 28 at Issue 50.

                                       4
<PAGE>

                  ported numbers in the U S WEST network which U S WEST forwards
                  to Pac-West for termination. To the extent U S WEST is unable
                  to provide billing detail information within a reasonable time
                  frame, the Parties may agree on an interim method to share
                  access revenues pursuant to a mutually agreed upon surrogate
                  approach.

7.       Network Elements

         7.1(11)  U S WEST may receive compensation for electronic interfaces as
                  an initial access fee for its expenditures at such time as the
                  completion of the gateway interfaces are effected. The
                  reimbursement for such expenditures shall be apportioned among
                  all end users of the gateway interfaces in Arizona, including
                  U S WEST. U S WEST and Pac-West acknowledge that the specific
                  cost-sharing mechanism for electronic interfaces shall be
                  determined by a generic proceeding held by the Commission for
                  this purpose.

         7.2      [intentionally left blank for numbering consistency]

         7.3(12)  The expense of rebranding operator services and directory
                  assistance, if requested by Pac-West, shall be included as a
                  forward looking economic cost, such cost to be resolved in the
                  future proceeding to be conducted by the Commission as it
                  considers cost studies.

8.       Rate Schedule

         8.1      The rates for interconnection, unbundled Network Elements,
                  Ancillary Services, and Reciprocal Compensation are provided
                  in Schedule I to this Attachment 1.

----------

11   AT&T Order, p. 26 at Issue 45.
12   AT&T Order, p. 18 at Issue 30.

                                       5
<PAGE>

                           Schedule 1 of Attachment 1

                                    ARIZONA
                    U S WEST and Pac-West INTERIM PRICE LIST

<TABLE>
<CAPTION>
<S>                                                                                      <C>
UNBUNDLED NETWORK ELEMENTS
    Unbundled Loop

       Network Interface Device, New Customer, Recurring                                 $0.2550
       Network Interface Device, New Customer, Nonrecurring                               $30.19

       Loop Distribution                                                                     BFR
       Loop Concentrator                                                                     BFR
       Loop Feeder                                                                           BFR

       Unbundled 2 Wire Loop, Recurring                                                   $21.76
       Unbundled 4 Wire Loop, Recurring                                                   $41.63

       Residence Nonrecurring                                                             $41.83
       Business Nonrecurring                                                              $45.67

       Cable Unloading and Bridge Tap Removal, One-Time Charge                           $140.00

       Extension Technology, Recurring                                                     $6.75

    Switching

       Usage Per Minute                                                              $0.0035835

       Per Port, Recurring                                                                $1.37
       Per Port, Nonrecurring                                                            $56.03

   Entrance Facility
       DS1, Electrical, Recurring                                                        $89.42
       DS3, Electrical, Recurring                                                       $357.16
       DS1, Electrical, Nonrecurring                                                    $531.65
       DS3, Electrical, Nonrecurring                                                    $630.65

   Direct and Dedicated Transport

       DS0 Dedicated, Recurring                                                            $4.26

                                                                            Fixed       Per Mile
                                                                            -----       --------
       DS1 - 0 Miles                                                         None           None
       DS1 - Over 0 to 8                                                   $35.98          $0.65
       DS1 - Over 8 to 25                                                  $35.99          $0.94
       DS1 - Over 25 to 50                                                 $36.00          $1.75
       DS1 - Over 50                                                       $36.00          $1.59

       DS3 - 0 Miles                                                         None           None
       DS3 - Over 0 to 8                                                  $243.17         $13.32
       DS3 - Over 8 to 25                                                 $246.15         $15.90
       DS3 - Over 25 to 50                                                $250.66         $22.91
       DS3 - Over 50                                                      $249.26         $22.49
</TABLE>

                                     Page 1
<PAGE>

                           Schedule 1 of Attachment I

                                     ARIZONA
                    U S WEST and Pac-West INTERIM PRICE LIST

<TABLE>
<CAPTION>
<S>                                                                                      <C>
UNBUNDLED NETWORK ELEMENTS

    Multiplexing, per arrangement
       DS3 to DS 1, Recurring                                                            $196.85
       DS3 to DS1 Nonrecurring                                                           $394.50

    Common Transport/Tandem Transmission, Per Minute, Per Leg                          $0.000372

    Tandem Switching, Per Minute of Use                                                $0.002169

    Signaling (Note 1)
       Entrance Facility
       DS1, Electrical, Recurring                                                         $44.71
       DS3, Electrical, Recurring                                                        $178.58
       DS1, Electrical, Nonrecurring                                                     $265.83
       DS3, Electrical, Nonrecurring                                                     $315.33

    Direct Link Transport                                                   Fixed       Per Mile
                                                                            -----       --------
        DS0 - 0 Miles                                                        None           None
        DSO - Over 0 to 8                                                   $9.38          $0.04
        DSO - Over 8 to 25                                                  $9.38          $0.05
        DSO - Over 25 to 50                                                 $9.39          $0.06
        DSO - Over 50                                                       $9.39          $0.05

        DS1 - 0 Miles                                                        None           None
        DS1 - Over 0 to 8                                                  $17.99          $0.33
        DS1 - Over 8 to 25                                                 $18.00          $0.47
        DS 1 -Over 25 to 50                                                $18.00          $0.88
        DS 1 - Over 50                                                     $18.00          $0.80

        DS3 - 0 Miles                                                        None           None
        DS3 - Over 0 to 8                                                 $121.59          $6.66
        DS3 - Over 8 to 25                                                $123.08          $7.95
        DS3 - Over 25 to 50                                               $125.33         $11.46
        DS3 - Over 50                                                     $124.63         $11.25

       Multiplexing
       DS1 to DSO, Recurring                                                             $100.04
       DS3 to DS1, Recurring                                                              $98.43
       DS1 to DSO, Nonrecurring                                                          $179.56
       DS3 to DS1, Nonrecurring                                                          $197.25

    CCS Link - First Link, Nonrecurring                                                  $237.89
    CCS Link - Each additional Link, Nonrecurring                                         $34.14

    STP Port -Per Port, Recurring                                                        $104.29
    Signaling Link
       First Link, Recurring                                                               $9.87
       Additional Link, Recurring                                                          $9.87
    SCP/Databases - Per Message                                                         $0.00079
</TABLE>

                                     Page 2
<PAGE>

                           Schedule 1 of Attachment 1

                                     ARIZONA
                    U S WEST and Pac-West INTERIM PRICE LIST

<TABLE>
<CAPTION>
<S>                                                                                    <C>
ANCILLARY SERVICES

    Directory Assistance
       Price per Call - Facilities-Based Providers                                         $0.28

    Listings
       Primary Listings, Directory Assistance, White & Yellow Pages                    No Charge

    E911
       LEC and CLECs recover costs from PSAP                                           No Charge

    Assignment of Numbers                                                              No Charge
       Assignments per industry guidelines

    Busy Line Verification
       Per Call                                                                            $0.72

    Busy Line Interrupt
       Per Call                                                                            $0.87

    Interim Number Portability

       Service Establishment, Per Route, Per Switch, Nonrecurring                         $20.65
       Service Establishment, Per Ported Number, Nonrecurring                              $4.47
       Service Establishment, Additional and Consecutive Numbers                           $3.32
         Per Number Ported, Nonrecurring

PHYSICAL AND VIRTUAL COLLOCATION

    Common Elements
       Quote Preparation Fee, Nonrecurring                                             $1,055.76

       Cable Splicing
       Per Setup, Nonrecurring                                                           $439.50
       Per Fiber Spliced, Nonrecurring                                                    $27.15

       48 Volt Power, Per Ampere, Recurring, Per Month                                    $12.89

       48 Volt Power Cable
       20 Ampere Capacity - Recurring                                                      $0.21
       40 Ampere Capacity - Recurring                                                      $0.29
       60 Ampere Capacity - Recurring                                                      $0.35
       20 Ampere Capacity - Nonrecurring                                                  $59.14
       40 Ampere Capacity - Nonrecurring                                                  $80.69
       60 Ampere Capacity - Nonrecurring                                                   $95.34

       Equipment Bay, Per Shelf Rack Space, Recurring                                      $6.41

       Inspector per 1/2 Hour, Regular                                                    $24.49
       Inspector per 1/2 Hour, After Hours                                                $36.24

       Training per 1/2 Hour                                                              $23.95
</TABLE>

                                     Page 3
<PAGE>

                           Schedule 1 of Attachment 1

                                    ARIZONA
                    U S WEST and Pac-West INTERIM PRICE LIST
<TABLE>
<CAPTION>
<S>                                                                                      <C>
PHYSICAL AND VIRTUAL COLLOCATION (Note 2)

    Common Elements

       Engineering per 1/2 Hour, Regular                                                 $24.55
       Engineering per 1/2 Hour, After Hours                                             $35.25

       Installation per 1/2 Hour, Regular                                                $23.73
       Installation per 1/2 Hour, After Hours                                            $33.20

       Maintenance per 1/2 Hour, Regular                                                 $22.20
       Maintenance per 1/2 Hour, After Hours                                             $31.57

       Element Group 1
       Entrance Facility - 2 fibers, Recurring                                            $1.52
       Entrance Facility - 2 fibers, Nonrecurring                                     $1,514.67

       EICT Channel Terminations
       2-wire DSO EICT, Recurring                                                         $0.44
       4-wire DSO EICT, Recurring                                                         $0.86
       DS1 EICT, Recurring                                                                $4.28
       DS3 EICT, Recurring                                                               $14.98
       2-wire DSO EICT, Nonrecurring                                                    $141.54
       4-wire DSO EICT, Nonrecurring                                                    $141.54
       DS1 EICT, Nonrecurring                                                           $160.62
       DS3 EICT, Nonrecurring                                                           $161.46

       EICT Regeneration
       DS1 EICT, Regeneration, Recurring                                                  $6.30
       DS3 EICT, Regeneration, Recurring                                                 $41.32
       DS1 EICT, Regeneration, Nonrecurring                                             $160.62
       DS3 EICT, Regeneration, Nonrecurring                                             $161.46

Element Group 2
Entrance Enclosure:
   Manhole - Per Month Per Manhole                                                 $13.81
   Handhold - Per Month Per Handhold                                                $7.61

Conduit & Interduct fm Entrance Enclosure to Cable Vault, Per Foot/month            $0.21

Core Drill, Per Core, Nonrecurring                                                $181.57
Riser from Cable Vault to Customer Designated Equipment, Per Foot/Mont              $0.24
Fiber Optic Cable (24 Fiber Increment), Per Foot/Month                              $0.03

Fiber Placement in conduit and riser, Per Foot                                      $0.83

Copper Cable 25 Pair, Per Month                                                    $0.006
Copper Cable Splicing - Per Splice                                                 $45.64

Copper Cable Placement in Conduit and Riser - Per Foot                              $0.83
Coax Cable RG59 - Per Foot Per Month                                                $0.10

AC Power Per WATT, Per Month                                                        $0.03
</TABLE>

                                     Page 4
<PAGE>

                           Schedule 1 of Attachment 1

                                    ARIZONA
                    U S WEST and Pac-West INTERIM PRICE LIST

<TABLE>
<CAPTION>
<S>                                                                                       <C>
Humidification Per Eased Physical Space                                                   $28.23

Cage/Hard Wall Enclosure See Attachment 1, Section 3.6
Rent (w/ Maintenance) - per square foot Zone 1, Recurring                                  $2.75
Rent (w/ Maintenance) - per square foot Zone 2, Recurring                                  $2.26
Rent (w/ Maintenance) - per square foot Zone 3, Recurring                                  $2.06

RESALE -
    Customer Transfer Charge
       Business                                                                           $30.80
       Residence                                                                          $29.57
       ISDN                                                                               $31.08

    Resale Discount                                                                          17%
</TABLE>

Note

1 When purchasing signaling links, Pac-West will pay the appropriate Entrance
  Facility, Direct Link Transport. and Multiplexing price, plus the Signaling
  Link and CCS Link Price.

2 When purchasing Collocation, Pac-West will pay the listed price for elements
  in Element Group 1 and Element Group 2.

                                     Page 5
<PAGE>

                                                                  Attachment 2
                               TABLE OF CONTENTS

 1. Description .........................................................1

 2. General Terms and Conditions for Resale .............................2

 3. Basic Service Requirements ..........................................3

 4. Requirements for Specific Services ..................................4

 5. Service Functions ...................................................8

 6. Security and Law ....................................................9

 7. Ordering and Maintenance ............................................9

 8. Changes in Retail Service ..........................................10

 9. Customer Authorization Process .....................................10

 10. Pac-West Responsibilities .........................................11

 11. Pricing ...........................................................12

 12. Deposit ...........................................................12

                                       1
<PAGE>

RESALE

1.       Description

         1.1(1)   Pac-West may resell to any and all classes of end-users
                  Telecommunications Services obtained from U S WEST under this
                  Agreement, except for Centrex and Lifeline Assistance/Link-Up
                  (or similar) services, which Pac-West may only resell to those
                  subscribers who are eligible for such services. U S WEST will
                  not prohibit, nor impose unreasonable or discriminatory
                  conditions or limitations on the resale of its
                  Telecommunications Services. Pac-West may not resell
                  residential service to business customers, and business
                  service may not be resold to residential customers. The
                  foregoing shall permit the resale of Telecommunications
                  Services to another Reseller.

         1.2(2)   U S WEST will also make the following services available for
                  resale: residence basic exchange, Centrex Plus, Operator
                  Services, Directory Assistance, Optional Calling Plans, Volume
                  Discount Plans, Discounted Feature Packages, Private Line
                  Transport, negotiated contract arrangements, Business Basic
                  Exchange, PBX Trunks, Frame Relay Service, ISDN, listings,
                  features, intraLATA toll, AIN Services and WATS. This list of
                  services is neither all inclusive nor exclusive.

          1.3     At the request of Pac-West, and pursuant to the requirements
                  of the Act, and FCC rules and state regulations, U S WEST
                  shall make available to Pac-West for resale any
                  Telecommunications Services that U S WEST currently provides
                  or may offer hereafter, including, but not limited to,
                  Telecommunications Services offered through contract service
                  arrangements, special arrangements, discount plans and
                  promotions of more than ninety (90) days duration. Resale
                  discounts may vary from the standard resale discount, subject
                  to the approval of the Commission. U S WEST shall also provide
                  Service Functions, as agreed to in this Attachment 2. The
                  Telecommunications Services and Service Functions provided by
                  U S WEST to Pac-West pursuant to this Attachment 2 are
                  collectively referred to as "Local Resale".

         1.4      This Section 1 describes several services which U S WEST shall
                  make available to Pac-West for resale pursuant to this
                  Agreement. This description of services is neither all
                  inclusive nor exclusive. Except as may be noted elsewhere in
                  this Agreement, all services or offerings of U S WEST which
                  are to be offered for resale pursuant to the Act are subject
                  to the terms herein, even though they are not specifically
                  enumerated or described.

         1.5(3)   Voice mail and inside wire are not available for purchase at
                  the wholesale or discount rate; provided, however, that
                  nothing in this Agreement shall prevent Pac-West from
                  requesting voice mail and inside wire at the retail rates for
                  resale.

----------

1        MCIm Order, p. 13 at Issue 21 and AT&T Order, p. 16at Issue 29.
2        MCIm Order, p. 13 at Issue 21 and AT&T Order, p. 16 at Issue 29.
3        MCIm Order, p. 12 at Issue 21 and AT&T Order, pp. 14-15 at Issue 27.

                                       1
<PAGE>

               1.5.1     Voice Mail

                         U S WEST shall make available the SMDI-E ("Station
                         Message Desk Interface Enhanced"), where available, or
                         SMDI (Station Message Desk Interface), where SMDI-E is
                         not available, feature capability allowing for Voice
                         Mail Services. U S WEST shall make available, where
                         available, the MWI (Message Waiting Indicator) stutter
                         dialtone and message waiting light feature
                         capabilities. U S WEST shall make available CF-B/DA
                         (Call Forward on Busy/Don't Answer), CF/B (Call Forward
                         on Busy), and CF/DA (Call Forward Don't Answer) feature
                         capabilities allowing for Voice Mail services.

         1.6      Grandfathered Services

                  U S WEST shall offer for resale to Pac-West all grandfathered
                  services. For purposes of this Agreement, a grandfathered
                  service is a service that U S WEST no longer offers to new
                  subscribers or a class of new subscribers. Pac-West shall be
                  notified of any U S WEST request for the termination of
                  service and/or its grandfathering filed with the Commission or
                  U S WEST's intent to grandfather/withdraw a service at least
                  thirty (30) calendar days prior to the effective date of such
                  grandfathering or intended termination. The form of
                  notification may be either in written or electronic form.

         1.7      N11 Service

                  Pac-West shall have the right to resell any N11 service,
                  including, but not limited to, 411 and 911 services.

         1.8      Promotions

                  Promotions of ninety (90) days or less need not be made
                  available to Pac-West at the wholesale discount rate.(4)

         1.9      The specific business process requirements and systems
                  interface requirements are set forth in Attachments 5 and 6.

2.       General Terms and Conditions for Resale

         2.1      Primary Local Exchange Carrier Selection. U S WEST shall apply
                  the principles set forth in Section 64.1100 of the FCC Rules,
                  47 C.F.R. Section 64.1100, as implemented, to the process for
                  end-user selection of a primary local exchange carrier. In
                  accordance with the customer authorization process described
                  elsewhere in this Agreement, U S WEST shall not require
                  notification from the customer, another carrier, or another
                  entity, in order to process an Pac-West order for local
                  service for a customer.

----------

4        MCIm Order, p. 12 at Issue 21.

                                       2
<PAGE>

         2.2      Except where otherwise provided, Pac-West, or Pac-West's
                  agent, shall act as the single point of contact for its end
                  users' service needs, including, without limitation, sales,
                  service design, order taking, provision, change orders,
                  training, maintenance, trouble reports, repair, post-sale
                  servicing, billing, collection and inquiry. Pac-West shall
                  inform its end users that they are customers of Pac-West for
                  resold services. Pac-West's end users who inadvertently
                  contact U S WEST with questions regarding their Pac-West
                  service will be instructed to contact Pac-West. U S WEST end
                  users who inadvertently contact Pac-West with questions
                  regarding their U S WEST service will be instructed to contact
                  U S WEST. Nothing in this Agreement shall be deemed to
                  prohibit either Party from discussing its products and
                  services with customers of the other Party who solicit such
                  information or who are directly contacted by a Party.

3.       Basic Service Requirements

         3.1      Call Types

                  3.1.1    U S WEST shall provide the following call types,
                           features and functions to Pac-West and its end users
                           with no loss of feature or functionality: (a) dial
                           tone and ringing; (b) capability for either dial
                           pulse or touch tone; (c) flat and measured services;
                           (d) speech recognition as available with other custom
                           calling and CLASS features; (e) same extended area
                           service free calling area; (f) 1 + intraLATA toll
                           calling; (g) access to interLATA toll calling; (h)
                           access to international calling; (i) lines as well as
                           trunks (DID, DOD); 0) analog and digital private line
                           - all speeds; (k) off-premises extensions; (1)
                           Centrex; and (m) ISDN.

         3.2      U S WEST will provide access for Pac-West and all its end user
                  customers to all call types, including, but not limited to,
                  500, 700, 800, 900, exchanges and dial around services
                  (10XXX).

         3.3      U S WEST shall impose no restrictions on customers calling
                  (e.g., there should not be a 750 minute limit on flat rate
                  calling).

         3.4      U S WEST will provide pre-subscription services for intraLATA
                  and interLATA toll services in accordance with currently
                  accepted methods and procedures.

         3.5      Features Requirements

                  3.5.1    U S WEST will provide Pac-West the ability to suspend
                           and restore customer service, including vacation
                           suspension service, at the direction of Pac-West

                  3.5.2    End Office Features. U S WEST will provide to
                           Pac-West the same end office features available to U
                           S WEST's end users, including, but not limited to,
                           CLASS features, Custom Calling features, and AIN
                           features.

                  3.5.3    Call Blocking Features. U S WEST will provide to
                           Pac-West the same call blocking features as are
                           available to U S WEST's own Customers.

                                       3
<PAGE>

         3.6      Upon request, U S WEST shall provide Pac-West a list, in an
                  agreed upon format by central office, of all the
                  Telecommunications Services, features and functions offered by
                  U S WEST within sixty (60) days after the Effective Date of
                  this Agreement and shall provide updates to such lists as
                  further described in Attachment 5. U S WEST shall also provide
                  an electronic access method for Pac-West to ascertain the
                  service availability of a particular USOC in a given central
                  office.

4.       Requirements for Specific Services

         4.1      IntraLATA Toll

                  U S WEST will provide Pac-West its intraLATA toll service to
                  Pac-West for resale where 1 + intraLATA toll presubscription
                  is not available.

         4.2      Private Line Services

                  The following private line services shall be made available
                  without restriction from U S WEST: (a) voice grade private
                  line services; (b) off premise extensions; (c) foreign
                  exchange line service; (d) point-to-point and multi-point
                  digital services (e.g., 9.6 kbps-56 kbps; fractional DS-1);
                  (e) DS-1 Services; (f) DS-3 services; (g) OC-3 service (where
                  available); (h) frame relay service; (i) packet switched
                  services; 0) switched digital services; and (k) other private
                  line services as they are made available.

         4.3      Centrex Requirements

                  4.3.1    At Pac-West's option and as they are available to U S
                           WEST's own end users via interstate tariffs and state
                           tariffs, price lists, price schedules, catalogs, or
                           Individual Case Basis, Pac-West may purchase a
                           single, any combination, or the entire set of Centrex
                           features, including Centrex Management System (CMS)
                           or its equivalent as described in Attachment 5. The
                           Centrex service provided for resale will meet the
                           requirements set forth in the following provisions of
                           this Section.

                  4.3.2    All service levels and features of Centrex service
                           provided by U S WEST for resale by Pac-West shall be
                           at parity with levels and features provided to U S
                           WEST's own customers or as mutually agreed upon by
                           the Parties.

                  4.3.3    Pac-West may aggregate the Centrex local exchange and
                           intraLATA traffic usage of Pac-West subscribers to
                           the extent U S WEST makes such aggregation available
                           to itself or to its end users, Customers, or
                           Affiliates.

                  4.3.4    Pac-West may aggregate multiple Pac-West customers on
                           dedicated access facilities.

                  4.3.5    U S WEST shall make CMS -information available to
                           Pac-West at the common block level via an electronic
                           interface, as provided to U S WEST's own end users.

                  4.3.6    Pac-West may use remote call forwarding in
                           conjunction with Centrex service to provide service
                           to Pac-West local service Customers residing outside
                           of the

                                       4
<PAGE>

                           geographic territory in which U S WEST provides local
                           exchange service. However, U S WEST is not obligated
                           to provide facilities outside its service territory.

                  4.3.7    Pac-West may purchase any and all levels of Centrex
                           service for resale, without restriction on the
                           minimum or maximum number of lines that may be
                           purchased for any one level of service, equivalent to
                           what is offered to U S WEST's own end users.

                  4.3.8    U S WEST will provide to Pac-West the ability to
                           suppress the need for Pac-West customers to dial "9"
                           when placing calls outside the Centrex system.

                  4.3.9    U S WEST shall make available to Pac-West for resale,
                           at no additional charge, intercom calling among all
                           Pac-West customers within a common block who utilize
                           resold Centrex service.

         4.4      CLASS and Custom Features Requirements Pac-West may purchase a
                  single, any combination, or the entire set of CLASS and custom
                  features and functions, on a customer-specific basis. CLASS
                  features shall include, but not be limited to: caller
                  identification, name and number; call screening; call tracing;
                  and automatic call back on busy (*69). U S WEST shall provide
                  to Pac-West a list of all such CLASS and custom features and
                  functions within ten (10) days of the Effective Date of this
                  Agreement and shall provide updates to such list when new
                  features and functions become available.

         4.5      Customer Financial Assistance Programs

                  4.5.1    Local services provided to low-income subscribers,
                           pursuant to requirements established by the
                           appropriate state regulatory body, include programs
                           such as Lifeline, Voluntary Federal Customer
                           Financial Assistance Program, and Link-Up America
                           ("Voluntary Federal Customer Financial Assistance
                           Programs"). When a U S WEST subscriber eligible for
                           the Voluntary Federal Subscriber Financial Assistance
                           Programs or other similar state programs chooses to
                           obtain local service from Pac-West, U S WEST shall
                           forward information available to U S WEST regarding
                           such subscriber's eligibility to participate in such
                           programs to Pac-West and in electronic format when
                           available in accordance with the procedures set forth
                           herein.

                  4.5.2    U S WEST shall offer for resale Lifeline and Link-Up
                           Service; provided, however, that Pac-West may only
                           resell Lifeline and Link-Up Service to those
                           Customers eligible to receive such services.(5) Relay
                           services are not available for resale and shall be
                           kept centralized with U S WEST.(6) U S WEST will
                           provide information about the certification process
                           for the provisioning of Lifeline,

----------

5    AT&T Order, p. 14 at Issue 27.
6    AT&T Order, p. 14 at Issue 27.

                                       5
<PAGE>

                  Link-up, and similar services. U S WEST will forward to
                  Pac-West, in electronic format (when available), information
                  available to U S WEST regarding a subscriber's program
                  eligibility, status and certification when a U S WEST
                  subscriber currently on any U S WEST telephone assistance
                  program changes service to Pac-West as their local exchange
                  carrier. U S WEST will cooperate in obtaining any subsidy
                  associated with a subscriber transfer to Pac-West.

                  4.5.2.1  In connection with the transfer of a customer from U
                           S WEST to Pac-West, U S WEST shall provide to
                           Pac-West a customer profile, including customer name,
                           billing and residence address, billing telephone
                           number(s), eligibility for Voluntary Federal Customer
                           Financial Assistance Program, and other similar
                           services, and identification of U S WEST features and
                           services subscribed to by the customer.(7)

4.6      Discount Plans and Services

         4.6.1    In accordance with FCC rules and regulations, U S WEST shall
                  offer for resale all Discount Plans and Services.

         4.6.2    Pac-West can utilize any volume discounts that U S WEST makes
                  available to its end user customers.

4.7      Hospitality Service

         U S WEST shall provide all blocking, screening, and all other
         applicable functions available for hospitality lines utilized as such.

4.8      Telephone Line Number Calling Cards. Effective ten (10) Business Days
         after the date of an end-user's subscription to Pac-West service or
         within twenty-four (24) hours after Pac-West has notified U S WEST that
         it has replaced the subscriber's calling card, whichever is earlier, U
         S WEST will terminate its existing telephone line number-based calling
         cards and deactivate any U S WEST-assigned telephone line calling card
         number subaccount and PIN (including area code) ("TLN") from the LIDB.
         Pac-West may issue a new telephone calling card to such customer,
         utilizing the same TLN, and Pac-West shall have the right to enter such
         TLN in the LIDB for calling card validation purposes. US WEST will
         assume responsibility for billing its calling card calls that appear
         before the card is terminated. Nothing in this section shall prohibit U
         S WEST from terminating calling card service to U S WEST customers who
         have been determined to be a credit risk, according to U S WEST's
         normal business practices.

         4.8.1    Except as provided above, the Parties will cooperate in the
                  deactivation and activation of calling cards and will make
                  reasonable efforts to minimize the time a customer is without
                  an active calling card.

----------

7        AT&T Order, p. 14 at Issue 27.

                                       6
<PAGE>

         4.8.2    U S WEST shall not prohibit Pac-West from issuing a new
                  telephone calling card to an Pac-West customer utilizing the
                  same TLN and Pac-West shall have the right to enter the TLN in
                  the LIDB for calling card verification purposes.

         4.8.3    U S WEST will provide Pac-West the ability to utilize U S
                  WEST's LIDB for calling card validation.

4.9      U S WEST shall make engineering support available to Pac-West for
         Resale Services on the same basis as it provides such support for U S
         WEST end users. To the extent the cost of such engineering support has
         been considered an avoided cost in the development of the avoided cost
         discount, the cost of such engineering support shall be dome by
         Pac-West.

4.10     Payphone Services
         U S WEST agrees to sell for resale all tariffed PAL services at a
         appropriate wholesale discount to be determined by the Commission.

         4.10.1   U S WEST shall offer for resale, at a minimum, the following
                  Coin Line, PAL, and PAL Coinless features:

                  Billed Number Screening
                  Ability to "freeze" PIC selection
                  One (1) bill per line and/or multiple lines per BAN
                  Point of demarcation at the Network Interface location
                  Detailed billing showing all 1+ traffic on paper, diskette
                  or electronic format
                  Touch-tone service
                  Option for listed or non-listed numbers
                  Access to 911 service
                  One (1) directory per line

         4.10.2   At a minimum, U S WEST shall offer for resale the following
                  Coin Line features:

                  o    Access to all central office intelligence required to
                       perform answer detection, coin collection, coin return,
                       and disconnect
                   o   Answer Detection
                   o   Option to block all 1 + calls to international
                       destinations
                   o   IntraLATA Call Timing
                   o   Option of one-way or two-way service on line
                   o   Flat Rate Service, where available
                   o   Originating line screening
                   o   U S WEST central office intelligence for rating and other
                       functions
                   o   Option of measured service, where available
                   o   Ability to block any 1+ service that cannot be rated by
                       the coin circuits/TSPS/OSPS to the extent provided on U S
                       WEST coin lines
                   o   Protect against clip on fraud to the extent provided on
                       U S WEST coin lines
                   o   Protect against blue box fraud to the extent provided on
                       U S WEST coin lines
                   o   Provision of Information Digit 27

                                       7
<PAGE>

                  4.10.3   At a minimum, U S WEST shall offer for resale the
                           following PAL and PAL Coinless features:

                           o   Originating line screening

                           o   Two-way service option

                           o   Flat rate service based on rate groups, where
                               available

                           o   Option of one-way service on the line, where
                               available

                           o   Option of measured service, where available

                           o   Ability to keep existing serving telephone
                               numbers if cutover to Pac-West

                           o   Pac-West resale line incoming/outgoing screening

                           o   Provision of Information Digit 07

                           o   Provision of International Toll Denial
                               Recognition Tone, when available

                  4.10.4   At a minimum, U S WEST shall offer for resale the
                           following PAL Coin feature:

                           o   Blocking for 1+ international, 10XXXX1 +
                               international, 101XXXX1 + international, 1+900,
                               N11, 976 and option to block all 1-700 and 1-500
                               calls

                           o   Line side supervision option

                  4.10.5   At a minimum, U S WEST shall offer for resale the
                           following PAL Coinless feature:

                           o   Blocking for 1 + international, 1OXXXX1 +
                               international, 101XXXX1 +1 International, 1+900,
                               N 11, 976, and 7 digit local

                  4.10.7   U S WEST shall provide installation intervals to
                           Pac-West for ordering, call transfer, billing, and
                           PIC changes in accordance with performance standards
                           that are established by the Commission, pursuant to
                           subsequent agreement between the Parties or as
                           provided to any other Person.

5.       Service Functions

         5.1      U S WEST shall provide Pac-West with the information available
                  to U S WEST that Pac-West will need to certify subscribers who
                  transfer from U S WEST as exempt from charges (including
                  taxes), or eligible for reduced charges associated with
                  providing services.

         5.2      U S WEST shall provide Pac-West with appropriate notification
                  of all area transfers with line level detail one hundred
                  twenty (120) days before service transfer, and will also
                  notify Pac-West within one hundred twenty (120) days before
                  such change or any LATA boundary changes.

         5.3      U S WEST will work cooperatively with Pac-West in practices
                  and procedures regarding the handling of law enforcement and
                  service annoyance calls.

         5.4      Support Functions

                  5.4.1    Routing to Directory Assistance, Operator and Other
                           Services

                           5.4.1.1 US WEST shall make available to Pac-West the
                                   ability to route:

                                       8
<PAGE>

                                    (a) all Local Directory Assistance calls
                                        (411, (NPA) 555-1212) dialed by Pac-West
                                        Customers directly to the Pac-West
                                        Directory Assistance Services platform,
                                        where technically feasible and
                                        consistent with FCC rules; and

                                    (b) Local Operator Services calls (0+, 0-)
                                        dialed by Pac-West Customers directly to
                                        the Pac-West Local Operator Services
                                        platform, where technically feasible and
                                        consistent with FCC rules. Such traffic
                                        shall be routed over trunk groups
                                        between U S WEST end offices and the
                                        Pac-West Local Operator Services
                                        Platform, using standard Operator
                                        Services dialing protocols of 0+ or 0-.

                           5.4.1.2  All direct routing capabilities described
                                    herein shall permit Pac-West Customers to
                                    dial the same telephone numbers for Pac-West
                                    Directory Assistance and Local Operator
                                    Service as U S WEST customers use to access
                                    similar services.

6.       Security and Law

         6.1      U S WEST will maintain and safeguard all Pac-West customer
                  information according to CPNI privacy guidelines.

         6.2      U S WEST and Pac-West will work jointly in security matters as
                  they relate to Pac-West customers in a resale environment
                  including, but not limited to, harassment and annoyance calls.

         6.3      U S WEST and Pac-West will work jointly to support law
                  enforcement agency requirements including, but not limited to,
                  taps, traces and court orders.

         6.4      U S WEST will work jointly with Pac-West with respect to
                  prevention and settlement of fraud. 6.5 U S WEST and Pac-West
                  will work jointly to provide access to lines in a hostage
                  situation.

7.       Ordering and Maintenance

         7.1      Pac-West shall transmit to U S WEST the information necessary
                  for the installation (billing, listing and other information),
                  repair, maintenance and post-installation servicing according
                  to U S WEST's standard procedures, as described in the U S
                  WEST resale operations guide that will be provided to Pac-West
                  When U S WEST's end user or the end user's new service
                  provider discontinues the end users service in anticipation of
                  moving to another service provider, U S WEST will render its
                  closing bill to the end user effective with the disconnection.
                  Should Pac-West's end user, a new service provider or Pac-West
                  request service be discontinued to the end user, U S WEST will
                  issue a bill to Pac-West for that portion of the service
                  provided to the Pac-West end user. In no event, shall the
                  transition of an end user from U S WEST to Pac-West cause a
                  disconnection of service other than as specifically provided
                  for in this Agreement. It is understood that Pac-West's
                  decision to request a change in class of service (or a
                  conversion to a re-used unbundled loop) at

                                       9
<PAGE>

                  "transition" may involve a few minutes out-of-service. The
                  preceding may be modified by agreement of the Parties.

         7.2      U S WEST will notify Pac-West by fax or other processes as
                  agreed to by the Parties, when an end user moves to another
                  service provider.

         7.3      The new service provider shall be responsible for issuing
                  either a transfer of service or disconnect/new connect order,
                  as appropriate.

         7.4      The Parties agree that they will work cooperatively to develop
                  the standards and processes applicable to the transfer of such
                  accounts that are in arrears.

8.       Changes in Retail Service

         8.1      U S WEST will notify Pac-West of any changes in the terms and
                  conditions under which it offers Telecommunications Services
                  at retail to subscribers who are not telecommunications
                  service providers or carriers, including, but not limited to,
                  the introduction or discontinuance of any features, functions,
                  services or promotions. Such notification shall be through U S
                  WEST's filing for Commission approval of such matters.(8)

         8.2      U S WEST will provide to Pac-West advance notice of the
                  availability of new Telecommunication Services in accordance
                  with Section 23.2 of Part A of this Agreement.

         8.3      In the event U S WEST intends to terminate the provisioning of
                  any resold services to Pac-West for any reason, Pac-West shall
                  be responsible for providing any and all necessary notice to
                  its end users of the termination. In no case shall U S WEST be
                  responsible for providing such notice to Pac-West's end users.
                  U S WEST will provide sufficient written notice to Pac-West of
                  U S WEST's intent to terminate a resold service so that
                  Pac-West may notify its customers or intervene in the
                  proceedings on a timely basis consistent with Commission rules
                  and notice requirements.

9.       Customer Authorization Process

         9.1      U S WEST and Pac-West will use the existing PIC process as a
                  model, and the same or similar procedures for changes of local
                  providers. For a local carrier change initiated by Pac-West or
                  an agent of Pac-West to a customer, one of the following four
                  (4) procedures will constitute authorization for the change:
                  (a) Obtain the customer's written authorization (letter of
                  authorization or LOA); (b) Obtain the customer's electronic
                  authorization by use of an toll-free number, (c) Have the
                  customer's oral authorization verified by an independent third
                  party (third party verification); or (d) Send an information
                  package, including a prepaid, returnable postcard, within
                  three (3) days of the customer's request for a local carrier
                  change, and wait fourteen (14) days before submitting the
                  local carrier change to the previous carrier.

----------

8    AT&T Order, p. 22 at Issue 39(a).

                                       10
<PAGE>

     9.2       It is understood by U S WEST and Pac-West that these procedures
               may be superseded or modified by FCC rules or industry standards.

         9.3      U S WEST will provide Pac-West authorization for a local
                  carrier change that is initiated by a customer call to
                  Pac-West In this case Pac-West will: (a) maintain internal
                  records verifying the customer's stated intent to switch
                  carriers; and (b) produce the record in case of a slamming
                  dispute consistent with FCC rules.

         9.4      Should an end user dispute or a discrepancy arise regarding
                  the authority of Pac-West to act on behalf of the end user,
                  Pac-West is responsible for providing a written response
                  evidencing its authority to U S WEST within five (5) Business
                  Days of receipt of a written request from U S WEST describing
                  the basis of the dispute or discrepancy. If there is a
                  conflict between the end user designation or Pac-West does not
                  provide a response within five (5) Business Days, U S WEST
                  shall honor the designation of the end user. In the event the
                  end user designation is honored by U S WEST as described
                  above, then Pac-West shall remit a slamming charge, if any, in
                  accordance with Section 258 of the Act and Commission Rules.

         9.5      Should an end user dispute or a discrepancy arise regarding
                  the authority of U S WEST to act on behalf of the end user, U
                  S WEST is responsible for providing a written response
                  evidencing its authority to Pac-West within five (5) Business
                  Days of receipt of a written request from Pac-West describing
                  the basis of the dispute or discrepancy. If there is a
                  conflict between the end user designation or U S WEST does not
                  provide a response within five (5) Business Days, Pac-West
                  shall honor the designation of the end user. In the event the
                  end user designation is honored by Pac-West as described
                  above, then U S WEST shall remit a slamming charge, if any, in
                  accordance with Section 258 of the Act and Commission rules.

         9.6      Pac-West shall designate the Primary Interexchange
                  Carrier (PIC) assignments on behalf of its end users for
                  interLATA services and for intraLATA services when intraLATA
                  presubscription is implemented.

                  9.6.1    U S WEST is not required to assign central office
                           codes in a U S WEST central office for the exclusive
                           use of Pac-West.(9)

         9.7      When Customers switch from U S WEST to Pac-West, or to
                  Pac-West from any other service provider, such Customers shall
                  be permitted to retain their current telephone numbers if they
                  so desire and if they do not change their service address to
                  an address served by a different central office. U S WEST
                  shall take no action to prevent Pac-West Customers from
                  retaining their current telephone numbers.

10.      Pac-West Responsibilities

         10.1     Pac-West must send to U S WEST either (a) complete and
                  accurate end user listing information for Directory Assistance
                  and 911 Emergency Services using processes mutually

----------

9        AT&T Order, p. 30 at Issue 59.

                                       11
<PAGE>

                  agreed to by the Parties, or (b) notification of as is
                  migration. Pac-West must provide to U S WEST accurate end user
                  information to ensure appropriate listings in any databases in
                  which U S WEST retains and/or maintains end user information.
                  Pac-West assumes liability for the accuracy of information
                  provided to U S WEST. After receiving accurate information
                  from Pac-West, U S WEST assumes liability for the accuracy of
                  transmission of such information to the database provider
                  (e.g., SCC).

         10.2     U S WEST shall provide Pac-West with the capability to assign
                  large quantities (i.e., greater than ten (10)) telephone
                  numbers for multiple line and PBX customers in accordance with
                  U S WEST's tariffs and/or its own internal practices.

         10.3     Pac-West will provide a three (3) year non-binding forecast
                  within ninety (90) days of the Effective Date of this
                  Agreement. The forecast shall be updated and provided to U S
                  WEST on a quarterly basis. The initial forecast will provide:

                  o The date service will be offered (by city and/or state)

                  o The type and quantity of service(s) which will be offered

                  o Pac-West's anticipated order volume

                  o Pac-West' s key contact personnel

11.      Pricing

         The wholesale discount rate charged to Pac-West for Local Resale is set
         forth in Attachment 1 of this Agreement.

12.      Deposit

         12.1     U S WEST may require a suitable deposit to be held by U S WEST
                  as a guarantee for payment of U S WEST's charges for companies
                  which cannot demonstrate sufficient financial integrity based
                  on commercially reasonable standards, which may include a
                  satisfactory credit rating as determined by a recognized
                  credit rating agency reasonably acceptable to U S WEST.

         12.2     When the service is terminated or when Pac-West has
                  established satisfactory credit, if required under the terms
                  of the preceding paragraph, the amount of the initial or
                  additional deposit, with any interest due, will, at Pac-West's
                  option, be either credited to Pac-West's account or refunded
                  Satisfactory credit for Pac-West is defined as (a) twelve (12)
                  months positive payment history in another capacity with U S
                  WEST, such as in the interexchange area; (b) financial
                  standing as outlined in the preceding paragraph above; (c)
                  posting a bond,(10) or (d) twelve (12) consecutive months'
                  service as a reseller without a termination for nonpayment and
                  with no more than one (1) notification of intent to terminate
                  service for nonpayment. Interest on the deposit shall be
                  accumulated by U S WEST at a rate equal to the federal prime
                  rate, as published in the Wall Street Journal from time to
                  time.

----------

10       AT&T Order, p. 21 at Issue 38.

                                       12
<PAGE>

                                                                  Attachment 3
                               TABLE OF CONTENTS

 1. Introduction ..........................................................1
 2. Unbundled Network Elements ............................................1
 3. Standards for Network Elements ........................................3
 4. Tandem Switching ......................................................3
 5. Shared Transport ......................................................6
 6. Common Transport ......................................................6
 7. Dedicated Transport ...................................................9
 8. Loop ..................................................................17
 9. Distribution ..........................................................24
 10. Local Switching ......................................................27
 11. Network Interface Device .............................................34
 12. Operator Systems .....................................................35
 13. E911 .................................................................35
 14. Directory Assistance Data ............................................36
 15. Signaling Link Transport .............................................36
 16. Signaling Transfer Points (STPS) .....................................37
 17. Service Control Points/Data bases ....................................41
 18. Additional Requirements ..............................................49
     18.1 Cooperative Testing .............................................49
     18.2 Performance .....................................................51

                                       1
<PAGE>

                           UNBUNDLED ACCESS/ELEMENTS

1.       Introduction

         1.1      U S WEST shall provide unbundled Network Elements in
                  accordance with this Agreement, the Act, FCC rules and
                  regulations, and state rules, regulations and orders. The
                  price for each Network Element is set forth in Attachment 1 of
                  this Agreement. Except as otherwise set forth in this
                  Attachment, Pac-West may order Network Elements as of the
                  Effective Date of this Agreement.

         1.2      General Terms

                  1.2.1    U S WEST agrees to make available the following
                           unbundled Network Elements which are addressed in
                           more detail in the following sections of this
                           Attachment: (a) local loop, (b) local and tandem
                           switches (including all vertical switching features
                           provided by such switches), (c) interoffice
                           transmission facilities, (d) network interface
                           devices, (e) signaling and call-related database
                           facilities, (f) operations support systems functions,
                           and (g) operator and directory assistance
                           facilities.(1)

                  1.2.2    U S WEST shall offer each Network Element
                           individually and in Combinations with any other
                           Network Element or Network Elements in order to
                           permit Pac-West to combine such Network Element or
                           Network Elements obtained from U S WEST or with
                           network components provided by itself or by third
                           parties to provide Telecommunications Services to its
                           subscribers. Pac-West may purchase unbundled Network
                           Elements individually or in Combinations without
                           restrictions as to how those elements may be
                           rebundled.(2)

2.       Unbundled Network Elements

         2.1      U S WEST shall offer Network Elements to Pac-West on an
                  unbundled basis on rates, terms and conditions that are just
                  reasonable, and non-discriminatory in accordance with the
                  terms and conditions of this Agreement.

         2.2      U S WEST shall permit Pac-West to connect Pac-West's
                  facilities or facilities provided to Pac-West by third parties
                  with each of U S WESTs unbundled Network Elements at any
                  technically feasible point designated by Pac-West.

         2.3      Pac-West may use one or more Network Elements to provide any
                  feature, function, capability, or service option such Network
                  Element(s) is capable of providing or any feature,

----------

1        MCIm Order, p. 25 and AT&T Order, p. 11 at Issue 18.
2        MCIm Order, p. 11 at Issue 14 and AT&T Order, p. 13 at Issue 25.

                                       1
<PAGE>

                 function, capability, or service option described in the
                 technical references identified herein, or as may otherwise be
                 determined by Pac-West.

                 2.3.1    Pac-West may, at its option, designate any technically
                          feasible method of access to unbundled Network
                          Elements, including access methods currently or
                          previously in use by U S WEST.

        2.4      Pac-West may purchase unbundled Network Elements without
                 restrictions as to how Pac-West may rebundle those elements.(3)

        2.5      For each Network Element, U S WEST shall provide a demarcation
                 point (e.g., at a Digital Signal Cross Connect, DCS, Light
                 Guide Cross Connect panel or a Main Distribution Frame) and, if
                 necessary, access to the Pac-West side of such demarcation
                 point, which Pac-West agrees is suitable. Where U S WEST
                 provides combined Network Elements at Pac-West's direction,
                 however, no demarcation point shall exist between such
                 contiguous Network Elements.

        2.6      [intentionally left blank for numbering consistency]

        2.7      This Attachment describes the initial set of Network Elements
                 which Pac-West and U S WEST have identified as of the Effective
                 Date of this Agreement:

                  o    Loop
                  o    Network Interface Device
                  o    Distribution (subject to the BFR)
                  o    Local Switching
                  o    Operator Systems
                  o    Shared Transport
                  o    Common Transport
                  o    Dedicated Transport
                  o    Signaling Link Transport
                  o    Signaling Transfer Points
                  o    Service Control Points/Databases
                  o    Tandem Switching
                  o    911
                  o    Directory Assistance

         2.8      Pac-West and U S WEST agree that the Network Elements
                  identified in this Attachment are not all of the possible
                  Network Elements.

         2.9      Pac-West may identify additional or revised Network Elements
                  as necessary to provide Telecommunications Services to its
                  subscribers, to improve network or service efficiencies or to
                  accommodate changing technologies, customer demand, or other
                  requirements.

                  2.9.1    Pac-West will request such Network Elements in
                          accordance with the Bona Fide Request process
                          described in Part A of this Agreement. Additionally,
                          if U S WEST

----------

3    MCIm Order, p. 11 at Issue 14 and AT&T Order, p. 13 at Issue 25.

                                       2
<PAGE>

                           provides any Network Element that is not identified
                           in this Agreement to itself, to its own subscribers,
                           to a U S WEST Affiliate or to any other Person, U S
                           WEST shall make available the same Network Element to
                           Pac-West on terms and conditions no less favorable to
                           Pac-West than those provided to itself or to any
                           other party.

3.       Standards for Network Elements

         3.1      Each Network Element shall be furnished at a service level
                  equal to or better than the requirements set forth in the
                  technical references identified herein for each such Network
                  Element, as well as any performance or other requirements,
                  identified in this Attachment, subject to Sections 1.3.1 and
                  1.3.2 of Part A of this Agreement.

         3.2      If one or more of the requirements set forth in this Agreement
                  are in conflict, the Parties agree to resolve such conflict in
                  accordance with the dispute resolution provisions of Part A of
                  this Agreement.

                  3.2.1    U S WEST shall provide to Pac-West, upon request,
                           engineering, design, performance and other network
                           data sufficient for Pac-West to determine that the
                           requirements of this Section 3 are being met. in the
                           event such data indicates that the requirements set
                           forth herein are not being met, U S WEST shall,
                           within ten (10) days, cure any design, performance or
                           other deficiency and provide new data sufficient for
                           Pac-West to determine that such deficiencies have
                           been cured.

                  3.2.2    U S WEST agrees to work cooperatively with Pac-West
                           to provide Network Elements that will meet Pac-West's
                           needs in providing Telecommunications Services to its
                           subscribers.

          3.3     Unless otherwise requested by Pac-West, each Network Element
                  or any Combination thereof and the connections between Network
                  Elements provided by U S WEST to Pac-West shall   be made
                  available to Pac-West at any technically feasible point, that
                  is equal to or better than the manner in which U S WEST
                  provides such Network Elements, Combinations and connections
                  to itself, its own subscribers, to a U S WEST Affiliate or to
                  any other Person.

Description of Unbundled Elements

4.       Tandem Switching

         U S WEST will provide a tandem switching element ("Tandem Switching")
         on an unbundled basis. The tandem switch element includes the
         facilities connecting the trunk distribution frames to the switch, and
         all the functions of the switch itself, including those facilities that
         establish a temporary transmission path between two (2) other switches.
         The definition of the tandem switching element also includes the
         functions centralized in tandems rather than in separate end office
         switches, such as call recording, the routing of calls to Operator
         Services, and signaling conversion functions.

                                       3
<PAGE>

         4.1      Definition:

                  Tandem Switching is the function that establishes a
                  communications path between two (2) switching offices through
                  a third switching office (the tandem switch) including, but
                  not limited to, those of Pac-West, U S WEST, independent
                  telephone companies (ICOs), IXCs and wireless carriers.

         4.2      Technical Requirements

                  4.2.1    Tandem Switching provided by U S WEST to Pac-West
                           shall have the same capabilities or equivalent
                           capabilities as those described in Bell
                           Communications Research TR-TSY-000540 Issue 2R2,
                           Tandem Supplement, June 1, 1990. The requirements for
                           Tandem Switching include, but are not limited to, the
                           following:

                           4.2.1.1  Tandem Switching shall provide signaling to
                                    establish a tandem connection;

                           4.2.1.2  Tandem Switching shall provide screening
                                    (digit analysis) and routing as designated
                                    by Pac-West;

                           4.2.1.3  Where technically feasible, Tandem Switching
                                    shall provide recording of all billable
                                    events designated by Pac-West;

                           4.2.1.4  Tandem Switching shall allow passing of
                                    Advanced Intelligent Network triggers
                                    supporting AIN features;

                           4.2.1.5  Tandem Switching shall provide connectivity
                                    to Operator Systems as designated by
                                    Pac-West;

                           4.2.1.6  Tandem Switching shall provide access to
                                    toll free number portability database where
                                    Pac-West sends such traffic to a tandem;

                           4.2.1.7  Tandem Switching shall allow the passing of
                                    all functions associated with traffic for
                                    all trunk interconnection discussed under
                                    the "Network Interconnection" section of
                                    this Agreement (e.g., SS7, MF, DTMF, Dial
                                    Pulse, PRI-ISDN, DID, and CAMA-ANI (if
                                    appropriate for 911));

                           4.2.1.8  Tandem Switching shall provide connectivity
                                    to PSAPs where 911 solutions are deployed
                                    and the tandem is used for 911; and

                           4.2.1.9  Tandem Switching shall provide connectivity
                                    to Transit Traffic to and from other
                                    carriers.

                  4.2.2    Tandem Switching shall accept connections (including
                           the necessary signaling and trunking
                           interconnections) between end offices, other tandems,
                           IXCs, ICOs, CAPs and CLEC switches.

                  4.2.3    Tandem Switching shall provide local tandeming
                           functionality between two (2) end offices, including
                           two (2) offices belonging to different CLECs (e.g.,
                           between an Pac-West end office and the end office of
                           another CLEC).

                                       4
<PAGE>

                           4.2.4    Tandem Switching shall preserve CLASS/LASS
                                    features and Caller ID as traffic is
                                    processed. Additional signaling information
                                    and requirements are provided in Section 15
                                    of this Attachment.

                           4.2.5    Tandem Switching shall record billable
                                    events and send them to the area billing
                                    centers designated by Pac-West. Billing
                                    requirements are specified in Attachment 5
                                    of this Agreement.

                           4.2.6    U S WEST shall perform routine testing and
                                    fault isolation on the underlying switch
                                    providing Tandem Switching and all its
                                    Interconnections. When requested by
                                    Pac-West, the results and reports of the
                                    testing shall be made immediately available
                                    to Pac-West.

                           4.2.7    When requested by Pac-West, U S WEST shall
                                    provide to Pac-West for review performance
                                    data regarding traffic characteristics or
                                    other measurable elements with respect to
                                    Pac-West traffic.

                           4.2.8    Tandem Switching shall control congestion
                                    using capabilities such as Automatic
                                    Congestion Control and Network Routing
                                    Overflow. Congestion control provided or
                                    imposed on Pac-West traffic shall be at
                                    parity with controls being provided or
                                    imposed on U S WEST traffic (e.g., U S WEST
                                    shall not block Pac-West traffic and leave
                                    its own traffic unaffected or less
                                    affected).

                           4.2.9    Tandem Switching shall route calls to U S
                                    WEST or Pac-West endpoints or platforms
                                    (e.g., Operator Services and PSAPs) on a per
                                    call basis as designated by Pac-West
                                    Detailed primary and overflow routing plans
                                    for all interfaces available within the U S
                                    WEST switching network shall be mutually
                                    agreed to by Pac-West and U S WEST. Such
                                    plans shall meet Pac-West requirements for
                                    routing calls through the local network.

                           4.2.10   Tandem Switching shall process originating
                                    toll free traffic received from an Pac-West
                                    local switch.

                           4.2.11   In support of AIN triggers and features,
                                    Tandem Switching shall provide SSP
                                    capabilities when these capabilities are not
                                    available from the Local Switching Network
                                    Element

                           4.2.12   The Local Switching and Tandem Switching
                                    functions may be combined in an office. If
                                    this is done, both Local Switching and
                                    Tandem Switching shall provide all of the
                                    functionality required of each of those
                                    Network Elements in this Agreement

         4.3      Interface Requirements

                  4.3.1    Tandem Switching shall provide interconnection to the
                           E911 PSAP where the underlying Tandem is acting as
                           the E911 Tandem.

                  4.3.2    Tandem Switching shall interconnect, with direct
                           trunks, to all carriers with which U S WEST
                           interconnects.

                                       5
<PAGE>

                  4.3.3    U S WEST shall provide all signaling necessary to
                           provide Tandem Switching with no loss of feature
                           functionality.

                  4.3.4    For applicable call types, Tandem Switching shall
                           interconnect with Pac-West's switch, using two-way
                           trunks, for traffic that is transiting via the U S
                           WEST network to interLATA or intraLATA carriers. At
                           Pac-West's request, Tandem Switching shall record and
                           keep records of traffic for billing.

                  4.3.5    At Pac-West's request, Tandem Switching shall provide
                           overflow routing of traffic from a given trunk group
                           or groups onto another trunk group or groups
                           according to the methodology employed by U S WEST as
                           designated by Pac-West.

         4.4      Tandem Switching shall meet or exceed each of the requirements
                  for Tandem Switching set forth in the following technical
                  references:

                  4.4.1    Bell Communications Research TR-TSY-000540 Issue 2R2,
                           Tandem Supplement, June 1, 1990;

                  4.4.2    GR-905-CORE covering CCSNIS; 4.4.3 GR-1 429-CORE for
                           call management features; and 4.4.4 GR-2863-CORE and
                           GR-2902-CORE for CCS AIN interconnection.

5.       Shared Transport

         U S WEST will provide unbundled access to U S WEST transmission
         facilities between end offices, end offices and the tandem switch, and
         the tandem switch and end offices for completing local calls. Such
         transmission facilities would be shared with U S WEST and, as
         applicable, with other CLECs. Transport routing shall be on an
         identical basis as routing is performed by U S WEST, providing the same
         efficiencies that U S WEST employs for itself. Costs will be allocated
         appropriately based upon the transmission path taken by each call.
         Shared transport shall meet the technical specifications as itemized
         below for Common Transport. Access to shared transport facilities shall
         be limited to U S WEST's existing(4) interoffice facilities.

6.       Common Transport

         6.1      Definition

                  Common Transport is an interoffice transmission path between
                  U S WEST Network Elements shared by carriers. Where U S WEST
                  Network Elements are connected by intraoffice wiring, such
                  wiring is provided as a part of the Network Elements and is
                  not Common Transport. U S WEST shall offer Common Transport as
                  of the Effective Date of this Agreement, at DS-0, DS-1, DS-3,
                  STS-1 or higher transmission bit rate circuits. Common

----------

4        Arizona Bench Order, May 29, 1997, p. 1537, Procedural Order, July 14,
         1997 at pages 16-17.

                                       6
<PAGE>

                    Transport consists of U S WEST inter-office transport
                    facilities and is distinct and separate from Local
                    Switching.

          6.2       Technical Requirements

                    6.2.1     U S WEST shall be responsible for the engineering,
                              provisioning, and maintenance of the underlying
                              equipment and facilities used to provide Common
                              Transport.

                    6.2.2     In accordance with Sections 1.3.1 and 1.3.2 of
                              Part A of this Agreement, at a minimum, Common
                              Transport shall meet all of the requirements set
                              forth in the following technical references, as
                              applicable for the transport technology being
                              used:

                              6.2.2.1   ANSI T1.101-1994, American National
                                        Standard for
                                        Telecommunications-Synchronization
                                        Interface Standard Performance and
                                        Availability;

                              6.2.2.2   ANSI T1.102-1993, American National
                                        Standard for Telecommunications Digital
                                        Hierarchy - Electrical Interfaces;

                              6.2.2.3   ANSI Tl.102.01-199x, American National
                                        Standard for Telecommunications -
                                        Digital Hierarchy - VT1.5;

                              6.2.2.4   ANSI T1.105-1995, American National
                                        Standard for Telecommunications -
                                        Synchronous Optical Network (SONET) -
                                        Basic Description including Multiplex
                                        Structure, Rates and Formats;

                              6.2.2.5   ANSI T1.105.01-1995, American
                                        National Standard for Telecommunications
                                        - Synchronous Optical Network (SONET)
                                        Automatic Protection Switching;

                              6.2.2.6   ANSI T1.105.02-1995, American National
                                        Standard for Telecommunications -
                                        Synchronous Optical Network (SONET) -
                                        Payload Mappings;

                              6.2.2.7   ANSI T1.105.03-1994, American National
                                        Standard for Telecommunications -
                                        Synchronous Optical Network (SONET) -
                                        Jitter at Network Interfaces;

                              6.2.2.8    ANSI T1.105.03a-1995, American National
                                         Standard for Telecommunications -
                                         Synchronous Optical Network
                                         (SONET)-Jitter at Network Interfaces -
                                         DS-1 Supplement;

                              6.2.2.9    ANSI T1. 105.05-1994, American National
                                         Standard for Telecommunications -
                                         Synchronous Optical Network (SONET) -
                                         Tandem Connection;

                                       7
<PAGE>

                              6.2.2.10  ANSI T1.105.06-199x, American National
                                        Standard for Telecommunications -
                                        Synchronous Optical Network (SONET) -
                                        Physical Layer Specifications;

                              6.2.2.11  ANSI T1. 1 05.07-199x, American National
                                        Standard for Telecommunications -
                                        Synchronous Optical Network (SONET) -
                                        Sub STS-1 Interface Rates and Formats;

                              6.2.2.12  ANSI T1. 105.09-199x, American National
                                        Standard for Telecommunications -
                                        Synchronous Optical Network (SONET) -
                                        Network Element Timing and
                                        Synchronization;

                              6.2.2.13   ANSI T1.106-1988, American National
                                         Standard for Telecommunications -
                                         Digital Hierarchy - Optical Interface
                                         Specifications (Single Mode);

                              6.2.2.14   ANSI T1. 107-1988, American National
                                         Standard for Telecommunications Digital
                                         Hierarchy - Formats Specifications;

                              6.2.2.15   ANSI T1. 1 07a-1 990, American National
                                         Standard for Telecommunications -
                                         Digital Hierarchy - Supplement to
                                         Formats Specifications (DS3 Format
                                         Applications);

                              6.2.2.16   ANSI T1.107b-1991, American National
                                         Standard for Telecommunications -
                                         Digital Hierarchy - Supplement to
                                         Formats Specifications;

                              6.2.2.17   ANSI T1. 117-199 1, American National
                                         Standard for Telecommunications -
                                         Digital Hierarchy - Optical Interface
                                         Specifications (SONET) (Single Mode -
                                         Short Reach);

                              6.2.2.18   ANSI T1.403-1989, Carrier to Subscriber
                                         Installation, DS-1 Metallic Interface
                                         Specification;

                              6.2.2.19   ANSI T1.404-1994, Network-to-Subscriber
                                         Installation - DS-3 Metallic Interface
                                         Specification;

                              6.2.2.20   ITU Recommendation G.707, Network node
                                         interface for the synchronous digital
                                         hierarchy (SDH);

                              6.2.2.21   ITU Recommendation G.704, Synchronous
                                         frame structures used at 1544, 6312,
                                         2048, 8488 and 44736 kbit/s
                                         hierarchical levels;

                              6.2.2.22   Bellcore FR-440 and TR-NWT-000499,
                                         Transport Systems Generic Requirements
                                         (TSGR): Common Requirements;

                              6.2.2.23   Bellcore GR-820-CORE, Generic
                                         Transmission Surveillance: DS-1 & DS-
                                         3 Performance;

                                       8
<PAGE>

                              6.2.2.24   Bellcore GR-253-CORE, Synchronous
                                         Optical Network Systems (SONET); Common
                                         Generic Criteria;

                              6.2.2.25   Bellcore TR-NWT 000507, Transmission,
                                         Section 7, Issue 5 (Bellcore, December
                                         1993) (A module of LSSGR,
                                         FR-NWT-000064.);

                              6.2.2.26   Bellcore TR-NWT-000776, Network
                                         Interface Description for ISDN
                                         Subscriber Access;

                              6.2.2.27   Bellcore TR-INS-000342, High-Capacity
                                         Digital Special Access Service
                                         Transmission Parameter Limits and
                                         Interface Combinations, Issue 1,
                                         February 1991;

                              6.2.2.28   Bellcore ST-TEC-000052,
                                         Telecommunications Transmission
                                         Engineering Textbook, Volume 2:
                                         Facilities, Third Edition, Issue 1, May
                                         1989; and

                              6.2.2.29   Bellcore ST-TEC-000051,
                                         Telecommunications Transmission
                                         Engineering Textbook Volume 1:
                                         Principles, Third Edition, Issue 1,
                                         August 1989.

7.       Dedicated Transport

         7.1      Definition:

                  Dedicated Transport is an interoffice transmission path
                  between Pac-West designated locations to which Pac-West is
                  granted exclusive use. Such locations may include U S WEST
                  central offices or other locations, Pac-West network
                  components, other carrier network components, or subscriber
                  premises.

                  7.1.2 U S WEST shall offer Dedicated Transport in each of the
                        following manners:

                              7.1.2.1  as capacity on a shared facility;

                              7.1.2.2. as a circuit (e.g., DS-1, DS-3, STS-1)
                                       dedicated to Pac-West; and

                              7.1.2.3  as a system (i.e., the equipment and
                                       facilities used to provide Dedicated
                                       Transport such as SONET ring) dedicated
                                       to Pac-West.

                  7.1.3  When Dedicated Transport is provided as a circuit or as
                         capacity on a shared facility, it shall include, as
                         appropriate:

                              7.1.3.1  multiplexing functionality;

                              7.1.3.2  grooming functionality; and,

                              7.1.3.3  redundant equipment and facilities
                                       necessary to support protection and
                                       restoration.

                                       9
<PAGE>

                  7.1.4    When Dedicated Transport is provided as a system, it
                           shall include:

                           7.1.4.1  transmission equipment such as multiplexers,
                                    line terminating equipment, amplifiers, and
                                    regenerators;

                           7.1.4.2  inter-office transmission facilities such as
                                    optical fiber, dark fiber(5), copper twisted
                                    pair, and coaxial cable;

                           7.1.4.3  redundant equipment and facilities necessary
                                    to support protection and restoration; and

                           7.1.4.4  access to the Digital Cross-Connect System
                                    ("DCS") functionality as an option in the
                                    same manner provided to IXCs that purchase
                                    transport services. DCS is described below
                                    in Section 7.5 of this Attachment.

7.2      Technical Requirements

         This Section sets forth technical requirements for all Dedicated
         Transport.

         7.2.1    When U S WEST provides Dedicated Transport as a circuit or a
                  system, the entire designated transmission circuit or system
                  (e.g., DS-1, DS-3, STS-1) shall be dedicated to Pac-West
                  designated traffic.

         7.2.2    U S WEST shall offer Dedicated Transport using currently
                  available technologies including, but not limited to, DS-1 and
                  DS-3 transport systems, SONET Bidirectional Line Switched
                  Rings, SONET Unidirectional Path Switched Rings, and SONET
                  point-to-point transport systems (including linear add-drop
                  systems), at all available transmission bit rates.

         7.2.3     When requested by Pac-West, Dedicated Transport shall provide
                   physical diversity. Physical diversity means that two (2)
                   circuits are provisioned in such a way that no single failure
                   of facilities or equipment will cause a failure on both
                   circuits.

         7.2.4    When physical diversity is requested by Pac-West, U S WEST
                  shall provide the maximum feasible physical separation between
                  transmission paths for all facilities and equipment unless
                  otherwise agreed to by Pac-West

         7.2.5    Upon Pac-West's written request and where available in the U S
                  WEST network, U S WEST shall provide real time and continuous
                  remote access to performance monitoring and alarm data
                  affecting, or potentially affecting, Pac-West's traffic.

         7.2.6    U S WEST shall offer the following interface transmission
                  rates for Dedicated Transport

----------

5    MCIm Order, p. 8 at Issue 9c and AT&T Order, p. 12 at Issue 22.

                                       10
<PAGE>

                           7.2.6.1  DS-1 (Extended SuperFrame - ESF/B8ZS, D4,
                                    and unframed applications shall be provided,
                                    except for those local/EAS tandems as
                                    designated by U S WEST);

                           7.2.6.2  DS-3 (C-bit Parity, M 13, and unframed
                                    applications shall be provided);

                           7.2.6.3  SONET standard interface rates in accordance
                                    with ANSI T1.105 and ANSI T1.105.07 and
                                    physical interfaces per ANSI T1.106.06,
                                    including referenced interfaces. In
                                    particular, V171.5 based STS-1s will be the
                                    interface at an Pac-West service node; and

                           7.2.6.4  where available, SONET standard interface
                                    rates in accordance with International
                                    Telecommunications Union ("ITU')
                                    Recommendation G.707 and Plesiochronous
                                    Digital Hierarchy (PDH) rates per ITU
                                    Recommendation G.704.

                  7.2.7    U S WEST shall provide intraoffice wiring up to a
                           suitable Point of Termination ("POT") between
                           Dedicated Transport and Pac-West designated
                           equipment.

                           U S WEST shall provide the following equipment for
                           the physical POT:

                           7.2.7.1 DSXl or DCS for DS-Is or VT1.5s;

                           7.2.7.2 DSX3 or DCS for DS-3s or STS-1s;and

                           7.2.7.3 Light guide cross-connect for optical signals
                           (e.g., OC-3 and OC-12).

                  7.2.8    For Dedicated Transport provided as a system, U S
                           WEST shall design the system, including, but not
                           limited to, facility routing and termination points,
                           according to Pac-West specifications.

                  7.2.9    Upon Pac-West's request and where available, U S WEST
                           shall provide Pac-West with electronic provisioning
                           control, of Pac-West specified Dedicated Transport
                           via Command-A-Link or equivalent interface in the
                           same manner as is provided to IXCs.

                  7.2.10   US WEST shall offer Dedicated Transport together with
                           and separately from DCS.

         7.3      Technical Requirements for Dedicated Transport Using SONET
                  Technology.

                  This Section sets forth additional technical requirements for
                  Dedicated Transport using SONET technology including rings,
                  point-to-point systems, and linear add-drop systems.

                  7.3.1    All SONET Dedicated Transport provided as a system
                           shall:

                           7.3.1.1  be synchronized with a primary Stratum 1
                                    level timing source;

                           7.3.1.2  provide SONET standard interfaces as
                                    available in the U S WEST network and
                                    consistent with generally accepted industry
                                    standards which properly interwork with
                                    SONET standard equipment from other vendors,
                                    including,

                                       11
<PAGE>

                                  but not limited to, SONET standard  section,
                                  line and path performance  monitoring,
                                  maintenance signals, alarms, and data
                                  channels;

                         7.3.1.3  provide Data Communications Channel ("DCC") or
                                  equivalent connectivity through the SONET
                                  transport system. Dedicated Transport provided
                                  over a SONET transport system shall be capable
                                  of routing DCC messages between Pac-West and
                                  SONET network components connected to the
                                  Dedicated Transport. For example, if Pac-West
                                  leases a SONET ring from U S WEST, that ring
                                  shall support DCC message routing between
                                  Pac-West and SONET network components
                                  connected to the ring; and

                         7.3.1.4  support the following performance requirements
                                  for each circuit (STS-1, DS-1, DS-3, etc.):

                                  7.3.1.4.1 no more than ten (10) Errored
                                           Seconds Per Day (Errored Seconds are
                                           defined in the technical reference at
                                           Section 7.4.5); and

                                  7.3.1.4.2 no more than one (1) Severely
                                            Errored Second Per Day (Severely
                                            Errored Seconds are defined in the
                                            technical reference at Section
                                            7.4.5).

          7.3.2    SONET rings shall:

                         7.3.2.1  be provisioned on physically diverse fiber
                                  optic cables (including separate building
                                  entrances where available). "Diversely routed"
                                  shall be interpreted as the maximum feasible
                                  physical separation between transmission
                                  paths, unless otherwise agreed to by Pac-West,

                         7.3.2.2  support dual ring interworking per SONET
                                  Standards where available in the U S WEST
                                  network;

                         7.3.2.3  provide the necessary redundancy in optics,
                                  electronics, and transmission paths such that
                                  no single failure will cause a service
                                  interruption;

                         7.3.2.4  where available, provide the ability to
                                  disable ring protection switching at
                                  Pac-West's direction (selective protection
                                  lock-out). This requirement applies to line
                                  switched rings only;

                         7.3.2.5  where available, provide the ability to use
                                  the protection channels to carry extra
                                  traffic. This requirement applies to line
                                  switched rings only;

                         7.3.2.6  provide 50 millisecond restoration as defined
                                  in SONET standards;

                         7.3.2.7  where available, have settable ring protection
                                  switching thresholds that shall be set in
                                  accordance with Pac-West's specifications;

                                       12
<PAGE>

                         7.3.2.8  where available, provide revertive protection
                                  switching with a settable wait to restore
                                  delay with a default setting of five (5)
                                  minutes. This requirement applies to line
                                  switched rings only;

                         7.3.2.9  provide non-revertive protection switching.
                                  This requirement applies to path switched
                                  rings only; and

                         7.3.2.10 adhere to the following availability
                                  requirements, where availability is defined in
                                  the technical reference set forth in Section
                                  7.4.5.,

                                  7.3.2.10.1 no more than 0.25 minutes of
                                             unavailability per month; and

                                  7.3.2.10.2 no more than 0.5 minutes of
                                             unavailability per year.

     7.4       In accordance with Sections 1.3.1 and 1.3.2 of Part A of this
               Agreement, at a minimum, Dedicated Transport shall meet each of
               the requirements set forth in Section 7.2.3 of this Attachment
               and in the following technical references:

               7.4.1     ANSI T1.105.04-1995, American National Standard for
                         Telecommunications - Synchronous Optical Network
                         (SONET) - Data Communication Channel Protocols and
                         Architectures;

               7.4.2     ANSI T1.119-1994, American National Standard for
                         Telecommunications - Synchronous Optical Network
                         (SONET) - Operations, Administration, Maintenance, and
                         Provisioning (OAM&P) Communications;

               7.4.3     ANSI T1.119.01-1995, American National Standard for
                         Telecommunications - Synchronous Optical Network
                         (SONET) Operations, Administration, Maintenance, and
                         Provisioning (OAM&P) Communications Protection
                         Switching Fragment;

               7.4.4     ANSI T1.119.02-199x, American National Standard for
                         Telecommunications - Synchronous Optical Network
                         (SONET) Operations, Administration, Maintenance, and
                         Provisioning (OAM&P) Communications Performance
                         Monitoring Fragment; and

               7.4.5     ANSI T1.231-1993 -American National Standard for
                         Telecommunications - Digital Hierarchy - Layer 1
                         In-Service Digital Transmission Performance Monitoring.

     7.5       Digital Cross-Connect System

               7.5.1     Definition

                         7.5.1.1   Digital Cross-Connect System ("DCS") is a
                                   function which provides automated cross
                                   connection of Digital Signal level 0 (DS-0)
                                   or higher transmission bit rate digital
                                   channels within physical interface
                                   facilities. Types of DCSs include, but are
                                   not limited to, DCS 1/0s, DCS 3/1s, and DCS
                                   3/3s, where the nomenclature 1/0 denotes
                                   interfaces typically at the DS-1 rate or
                                   greater with crossconnection typically at the
                                   DS-0 rate. This same nomenclature, at the
                                   appropriate rate substitution, extends to the
                                   other types of DCSs specifically

                                       13
<PAGE>

                      cited as 3/1 and 3/3. Types of DCSs that cross-connect
                      Synchronous Transport Signal level 1 (STS-1) or other
                      Synchronous Optical Network (SONET) signals (e.g., STS-3)
                      are also DCSs, although not denoted by this same type of
                      nomenclature. DCS may provide the functionality of more
                      than one of the aforementioned DCS types (e.g., DCS 3/3/1
                      which combines functionality of DCS 313 and DCS 3/1). For
                      such DCSs, the requirements will be, at least, the
                      aggregation of requirements on the "component' DCSs.

              7.5.1.2  In locations where automated cross connection capability
                       does not exist, a Digital Signal Cross-Connect ("DSX") or
                       light guide cross-connect patch panels and D4 channel
                       banks or other DS-0 and above multiplexing equipment used
                       to provide the function of a manual cross connection will
                       be made available.

              7.5.1.3  Interconnection between a DSX or light guide
                       cross-connect, to a switch, another cross-connect, or
                       other service platform device, is included as part of
                       DCS.

7.6      DCS Technical Requirements

         7.6.1    DCS shall provide completed end-to-end cross connection of the
                  channels designated by Pac-West.

         7.6.2    DCS shall perform facility grooming, multipoint bridging,
                  one-way broadcast, two-way broadcast, and facility test
                  functions, where technically feasible.

         7.6.3    DCS shall provide multiplexing, format conversion, signaling
                  conversion, or other functions, where technically feasible.

         7.6.4    The end-to-end cross connection shall be input to the
                  underlying device used to provide DCS from an operator at a
                  terminal or via an intermediate system. The cross connection
                  assignment shall remain in effect whether or not the circuit
                  is in use.

         7.6.5    U S WEST shall administer and maintain DCS.

         7.6.6    Where available, U S WEST shall provide various types of DCSs,
                  including:

                  7.6.6.1       DS-0 cross-connects (typically termed DCS 1/0);

                  7.6.6.2       DS1/VT1.5 (Virtual Tributaries at the 1.5Mbps
                                rate) cross-connects (typically termed DCS 3/1);

                  7.6.6.3       DS-3 cross-connects (typically termed DCS 3/3);

                  7.6.6.4       STS-1 cross-connects; and

                  7.6.6.5       other technically feasible cross-connects
                                designated by Pac-West.

                                       14
<PAGE>

          7.6.7     U S WEST shall provide immediate and continuous
                    configuration and reconfiguration of the channels between
                    the physical interfaces (i.e., U S WEST shall establish the
                    processes to implement cross connects on demand), where
                    available, based on engineering forecasts.

          7.6.8     U S WEST shall provide scheduled configuration and
                    reconfiguration of the channels between the physical
                    interfaces (i.e., U S WEST shall establish the processes to
                    implement cross connects on the schedule designated by
                    Pac-West) or, at Pac-West's option, permit Pac-West to
                    control such configurations and reconfigurations, where
                    available, based on engineering forecasts.

          7.6.9     DCS shall continuously monitor protected circuit packs and
                    redundant common equipment.

          7.6.10    DCS shall automatically switch to a protection circuit pack
                    on detection of a failure or degradation of normal
                    operation.

          7.6.11    DCS equipment shall be equipped with a redundant power
                    supply or a battery backup.

          7.6.12    U S WEST shall have available and utilize spare maintenance
                    facilities and equipment necessary for provisioning repairs.

          7.6.13    At Pac-West's option, U S WEST shall provide, where
                    available, Pac-West with real time performance monitoring
                    and alarm data on the signals and the components of the
                    underlying equipment used to provide DCS that actually
                    impact or might impact Pac-West's services. For example,
                    this may include hardware alarm data and facility alarm data
                    on a DS-3 in which an Pac-West DS-1 is traversing.

          7.6.14    At Pac-West's option, U S WEST shall provide Pac-West with
                    real time ability to initiate tests on integrated equipment
                    used to test the signals and the underlying equipment used
                    to provide DCS, as well as other integrated functionality
                    for routine testing and fault isolation where available.

          7.6.15    Where available, DCS shall provide SONET to asynchronous
                    gateway functionality (e.g., STS-1 to DS-1 or STS-1 to
                    DS-3).

          7.6.16    Where available, DCS shall perform optical to electrical
                    conversion where the underlying equipment used to provide
                    DCS contains optical interfaces or terminations (e.g.,
                    Optical Carrier level 3, i.e., OC-3, interfaces on a DCS
                    3/1).

          7.6.17    Where available, DCS shall have SONET ring terminal
                    functionality where the underlying equipment used to provide
                    DCS acts as a terminal on a SONET ring.

          7.6.18    DCS shall provide multipoint b6dging of multiple channels to
                    other DCSs. Pac-West may designate multipoint bridging to be
                    one-way broadcast from a single master to multiple
                    tributaries, or two-way broadcast between a single master
                    and multiple tributaries.

                                       15
<PAGE>

         7.6.19   DCS shall multiplex lower speed channels onto a higher speed
                  interface and demultiplex higher speed channels onto lower
                  speed interfaces as designated by Pac-West.

7.7      DCS Interface Requirements

         7.7.1    U S WEST shall provide physical interfaces on DS-0, DS-1, and
                  VT1.5 channel cross-connect devices at the DS-1 rate or
                  higher. In all such cases, these interfaces shall be in
                  compliance with applicable Bellcore, ANSI, ITU, and Pac-West
                  standards.

         7.7.2    U S WEST shall provide physical interfaces on DS-3 channel
                  cross-connect devices at the DS-3 rate or higher. In all such
                  cases, these interfaces shall be in compliance with applicable
                  Bellcore, ANSI, ITU, and Pac-West standards.

         7.7.3    U S WEST shall provide physical interfaces on STS-1
                  cross-connect devices at the OC-3 rate or higher. In all such
                  cases, these interfaces shall be in compliance with applicable
                  Bellcore, ANSI, ITU, and Pac-West standards.

         7.7.4    Interfaces on all other cross-connect devices shall be in
                  compliance with applicable Bellcore, ANSI, ITU, and Pac-West
                  standards.

7.8      In accordance with Sections 1.3.1 and 1.3.2 of Part A of this
         Agreement, DCS shall, at a minimum, meet all the requirements set forth
         in the following technical references:

         7.8.1    ANSI T1.102-1993, American National Standard for
                  Telecommunications - Digital Hierarchy - Electrical
                  Interfaces;

         7.8.2    ANSI T1.102.01-199x, American National Standard for
                  Telecommunications - Digital Hierarchy - VT1.5;

         7.8.3    ANSI T1.105-1995, American National Standard for
                  Telecommunications - Synchronous Optical Network (SONET) -
                  Basic Description including Multiplex Structure, Rates and
                  Formats;

         7.8.4    ANSI T1.105.03-1994, American National Standard for
                  Telecommunications - Synchronous Optical Network (SONET) -
                  Jitter at Network Interfaces;

         7.8.5    ANSI T1.105.03a-1995, American National Standard for
                  Telecommunications - Synchronous Optical Network (SONET):
                  Jitter at Network Interfaces - DS-1 Supplement;

         7.8.6    ANSI Tl.105.06-199x, American National Standard for
                  Telecommunications - Synchronous Optical Network (SONET) -
                  Physical Layer Specifications;

         7.8.7    ANSI T1.106-1988, American National Standard for
                  Telecommunications - Digital Hierarchy - Optical Interface
                  Specifications (Single Mode);

                                       16
<PAGE>

          7.8.8     ANSI T1.107-1988, American National Standard for
                    Telecommunications - Digital Hierarchy - Formats
                    Specifications;

          7.8.9     ANSI T1.107a-1990, American National Standard for
                    Telecommunications - Digital Hierarchy - Supplement to
                    Formats Specifications (DS-3 Format Applications);

          7.8.10    ANSI T1.107b-1991, American National Standard for
                    Telecommunications - Digital Hierarchy - Supplement to
                    Formats Specifications;

          7.8.11    ANSI T1.117-1991, American National Standard for
                    Telecommunications - Digital Hierarchy - Optical Interface
                    Specifications (SONET) (Single Mode - Short Reach);

          7.8.12    ANSI T1.403-1989, Carrier to Subscriber Installation, DS-1
                    Metallic Interface Specification;

          7.8.13    ANSI T1.404-1994, Network-to-Subscriber Installation - DS-3
                    Metallic Interface Specification;

          7.8.14    ITU Recommendation G.707, Network node interface for the
                    synchronous digital hierarchy (SDH);

          7.8.15    ITU Recommendation G.704, Synchronous frame structures used
                    at 1544, 6312, 2048, 8488 and 44736 kbit/s hierarchical
                    levels;

          7.8.16    FR-440 and TR-NWT-000499, Transport Systems Generic
                    Requirements (TSGR): Common Requirements;

          7.8.17    GR-820-CORE, Generic Transmission Surveillance: DS1 & DS3
                    Performance;

          7.8.18    GR-253-CORE, Synchronous Optical Network Systems (SONET):
                    Common Generic Criteria; and

          7.8.19    TR-NWT-000776, Network Interface Description for ISDN
                    Subscriber Access.

8.       Loop

     8.1  Definition

         8.1.1    A Loop is a transmission facility between a distribution
                  frame, or its equivalent in a U S WEST central office or wire
                  center, and the Network Interface Device (as defined herein)
                  or network interface at a subscriber's premises, to which
                  Pac-West are granted exclusive use. This includes, but is not
                  limited to, two-wire and fourwire analog voice-grade loops,
                  and two-wire and four-wire loops that are conditioned to
                  transmit the digital signals needed to provide ISDN, ADSL,
                  HDSL, and DS-1 level signals. A Loop may be composed of the
                  following components:

                  o Loop Concentrator/Multiplexer

                  o Loop Feeder

                  o Network Interface Device (NID)

                                       17
<PAGE>

                  o Distribution

                  8.1.1.1(6) Pac-West may purchase Loop and NID on an unbundled
                             basis. Pac-West shall use the Bona Fide Request
                             process set forth in Part A of this Agreement to
                             request unbundling of Loop
                             Concentrator/Multiplexer, Loop Feeder and
                             Distribution.

         8.1.2    If U S WEST uses Integrated Digital Loop Carrier ("DLCs")
                  systems to provide the local Loop, U S WEST will make
                  alternate arrangements, equal in quality, to permit Pac-West
                  to order a contiguous unbundled local Loop. These arrangements
                  may, at U S WEST's option, include the following: providing
                  Pac-West with copper facilities or universal DLC that meet
                  established technical parameters, deploying Virtual Remote
                  Terminals, allowing Pac-West to purchase the entire Integrated
                  DLC, or converting integrated DLCs to non-integrated systems.

         8.1.3    U S WEST shall provide the BRI U interface using 2-wire copper
                  loops in accordance with TR-NWT-000393, January 1991, Generic
                  Requirements for ISDN Basic Access Digital Subscriber Lines.

8.2      Technical Requirements

         Subdivided to each component as detailed below.

8.3      Interface Requirements

         Subdivided to each component as detailed below.

8.4      Loop Components

         8.4.1    Loop Concentrator/Multiplexer

              8.4.1.1 Definition:

                       8.4.1.1.1    The Loop Concentrator/Multiplexer is the
                                    Network Element that:

                      (a) aggregates lower bit rate or bandwidth signals to
                      higher bit rate or bandwidth signals (multiplexing); (b)
                      disaggregates higher bit rate or bandwidth signals to
                      lower bit rate or bandwidth signals (demultiplexing); (c)
                      aggregates a specified number of signals or channels to
                      fewer channels (concentrating); (d) performs signal
                      conversion, including encoding of signals (e.g., analog to
                      digital and digital to analog signal conversion); and (e)
                      in some instances performs electrical to optical (E/0)
                      conversion.

                       8.4.1.1.2 The Loop Concentrator/Multiplexer function may
                       be provided through a DLC system, channel bank,
                       multiplexer or other equipment at which

----------

6        MCIm Order, p. 7 at Issue 9(a).

                                       18
<PAGE>

         traffic is encoded and decoded, multiplexed and demultiplexed, or
         concentrated.

8.4.1.2 Technical Requirements

         8.4.1.2.1     The Loop Concentrator/Multiplexer shall be capable of
         performing its functions on the signals for the following services, as
         needed by Pac-West to provide end-to-end service capability to its
         subscriber, including, but not limited to:

                       8.4.1.2.1.1      two-wire & four-wire analog voice grade
                       loops;

                       8.4.1.2.1.2      two-wire & four-wire loops conditioned
                       to transmit the digital signals needed to provide digital
                       services;

                       8.4.1.2.1.3      4-wire digital data (2.4Kbps through
                       64Kbps and "n" times 64Kbps (where n  24);

                       8.4.1.2.1.4      DS-3 rate private lines where available;
                       and

                       8.4.1.2.1.5      Optical SONET rate private lines where
                       available.

         8.4.1.2.2     The Loop Concentrator/Multiplexer shall perform the
         following functions as  appropriate:

                       8.4.1.2.2.1      analog to digital signal conversion of
                       both incoming and outgoing (upstream and downstream)
                       analog signals;

                       8.4.1.2.2.2      multiplexing of the individual digital
                       signals up to higher transmission bit rate signals (e.g.,
                       DS-0, DS-1, DS-3, or optical SONET rates) for transport
                       to the U S WEST central office through the Loop Feeder,
                       and

                       8.4.1.2.2.3      concentration of end-user subscriber
                       signals onto fewer channels of a Loop Feeder (when
                       available the concentration ratio shall be as specified
                       from time to time by Pac-West).

                       8.4.1.2.2.4      Concentration ratios shall not impair
                       analog or digital performance.

         8.4.1.2.3.       Pac-West may request U S WEST to provide power for the
         Loop Concentrator/Multiplexer through a non-interruptible source, if
         the function is performed in a central office, or from a commercial AC
         power source with battery backup, if the equipment is located outside a
         central office. Such power shall also adhere to the requirements stated
         herein.

                                       19
<PAGE>

         8.4.1.2.4 In accordance with Sections 1.3.1 and 1.3.2 of Part A of this
         Agreement, the Loop Concentrator/Multiplexer shall be provided to
         Pac-West in accordance with the following Technical References:

              8.4.1.2.4.1      Bellcore TR-NWT-000057, Functional Criteria for
              Digital Loop Carder Systems, Issue 2, January 1993;

              8.4.1.2.4.2      Bellcore TR-NWT-000393, Generic Requirements for
              ISDN Basic Access Digital Subscriber Lines;

              8.4.1.2.4.3      T1.106 - 1988, American National Standard for
              Telecommunications  - Digital Hierarchy - Optical Interface
              Specifications (Single Mode);

              8.4.1.2.4.4      ANSI T1.105-1995, American National Standard for
              Telecommunications  -  Synchronous Optical Network (SONET) -Basic
              Description including Multiplex Structure, Rates and Formats;

              8.4.1.2.4.5      ANSI T1.102-1993, American National Standard for
              Telecommunications - Digital Hierarchy - Electrical Interfaces;

              8.4.1.2.4.6      ANSI T1.403-1989, American National Standard for
              Telecommunications  -  Carder  to Subscriber Installation, DS-1
              Metallic Interface Specification;

              8.4.1.2.4.7      Bellcore GR-253-CORE, Synchronous Optical Network
              Systems (SONET), Common Generic Criteria;

              8.4.1.2.4.8      Bellcore TR-TSY-000008, Digital Interface Between
              the SLC 96 Digital Loop Carrier System and a Local Digital Switch,
              Issue 2, August 1987;

              8.4.1.2.4.9      Bellcore TR-NWT-000303, Integrated Digital Loop
              Carrier System Generic Requirements, Objectives and Interface,
              Issue 2, December  1992; Rev. 1, December  1993; Supplement 1,
              December 1993;

              8.4.1.2.4.10     Bellcore TR-TSY-000673, Operations Systems
              Interface for an IDLC System, (LSSGR) FSD 20-02-2100, Issue 1,
              September 1989; and

              8.4.1.2.4.11     Bellcore Integrated Digital Loop Carrier System
              Generic Requirements, Objectives and Interface, GR-303-CORE, Issue
              1, September 1995.

                                       20
<PAGE>

8.4.1.3 Requirements for an Intelligent Loop Concentrator/ Multiplexer:

     8.4.1.3.1    In addition to the basic functions described above for the
                  Loop Concentrator/Multiplexer, the Intelligent Loop
                  Concentrator/Multiplexer ("IC/M") shall provide facility
                  grooming, facility test functions, format conversion and
                  signaling conversion, as appropriate.

     8.4.1.3.2    The underlying equipment that provides such IC/M function
                  shall continuously monitor protected circuit packs and
                  redundant common equipment.

     8.4.1.3.3    The underlying equipment that provides such ICIM function
                  shall automatically switch to a protection circuit pack on
                  detection of a failure or degradation of normal operation.

     8.4.1.3.4    The underlying equipment that provides such IC/M function
                  shall be equipped with a redundant power supply or a battery
                  back-up.

     8.4.1.3.5    Pac-West may request U S WEST to provide Pac-West with real
                  time performance monitoring and alarm data on IC/M elements
                  that may affect Pac-West's traffic. This includes IC/M
                  hardware alarm data and facility alarm data on the underlying
                  device that provides such IC/M function.

     8.4.1.3.6    Pac-West may request U S WEST to provide Pac-West with real
                  time ability to initiate tests on the underlying device that
                  provides such IC/M function integrated test equipment as well
                  as other integrated functionality for routine testing and
                  fault isolation.

8.4.1.4 Interface Requirements

     8.4.1.4.1    The Loop Concentrator/Multiplexer shall meet the following
                  interface requirements, as appropriate for the configuration
                  that Pac-West designates:

     8.4.1.4.2    The Loop Concentrator/Multiplexer shall provide an analog
                  voice frequency copper twisted pair interface at the serving
                  wire center.

     8.4.1.4.3    The Loop Concentrator/Multiplexer shall provide digital 4-wire
                  electrical interfaces at the serving wire center.

     8.4.1.4.4    The Loop Concentrator/Multiplexer shall provide optical SONET
                  interfaces at rates of O1.C-3, OC-12, OC-48, and OC-N.

     8.4.1.4.5    The Loop Concentrator/Multiplexer shall provide the Bellcore
                  TR-303 DS-1 level interface at the serving wire center. Loop
                  Concentrator/ Multiplexer shall provide Bellcore TR-08 modes
                  1&2 DS1 interfaces when designated by Pac-West.

                                       21
<PAGE>

         8.4.1.4.6    The Intelligent Loop Concentrator/Multiplexer shall be
                      provided to Pac-West in accordance with the Technical
                      References set forth in Sections 8.4.1.2.4.8 through
                      8.4.1.2.4.11, above.

8.4.2    Loop Feeder

     8.4.2.1 Definition:

         8.4.2.1.1    The Loop Feeder is the Network Element that provides
                      connectivity between (a) a Feeder Distribution Interface
                      (FDI) associated with Loop Distribution and a termination
                      point appropriate for the media in a central office, or
                      (b) a Loop Concentrator/Multiplexer provided in a remote
                      terminal and a termination point appropriate for the media
                      in a central office.

         8.4.2.1.2    Pursuant to a Bona Fide Request for unbundled feeder or
                      distribution, U S WEST shall provide Pac-West physical
                      access to the FDI and the right to connect the Loop Feeder
                      to the FDI.

         8.4.2.1.3(7) Upon request from Pac-West regarding a specific area, U S
                      WEST shall provide information on Feeder Distribution
                      Interface (FDI) within a reasonable time. If such
                      information is available as part of U S WEST's operations
                      support system, it must be made available to Pac-West on
                      the same terms and conditions as it is available to U S
                      WEST. U S WEST need not provide information which is
                      already publicly available.

         8.4.2.1.4    The physical medium of the Loop Feeder may be copper
                      twisted pair, or single or multi-mode fiber or other
                      technologies as designated by Pac-West In certain cases,
                      Pac-West will require a copper twisted pair loop even in
                      instances where the medium of the Loop Feeder for services
                      that U S WEST offers is other than a copper facility.
                      Special construction charges may apply if no copper
                      twisted pair facilities are available.

     8.4.2.2 Requirements for Loop Feeder

         8.4.2.2.1    The Loop Feeder shall be capable of transmitting analog
                      voice frequency, basic rate ISDN, digital data, or, where
                      available in the network, analog radio frequency signals,
                      as appropriate.

         8.4.2.2.2    U S WEST shall provide appropriate power for all active
                      elements in the Loop Feeder. U S WEST will provide
                      appropriate power from a central office source, or from a
                      commercial AC source with rectifiers for AC to DC
                      conversion and 8-hour battery back-up when the equipment
                      is located in an outside plant Remote Terminal ("RT").

----------

7        MCIm Order, p. 24 at Issue 42.

                                       22
<PAGE>

8.4.2.3  Additional Requirements for Special Copper Loop Feeder Medium

         In addition to the requirements set forth above, Pac-West may require U
         S WEST to provide copper twisted pair Loop Feeder unfettered by any
         intervening equipment (e.g., filters, load coils, and range extenders),
         so that Pac-West can use these Loop Feeders for a variety of services
         by attaching appropriate terminal equipment at the ends.

8.4.2.4  Additional Technical Requirements for DS-1 Conditioned Loop Feeder

         In addition to the requirements set forth above, Pac-West may designate
         that the Loop Feeder be conditioned to transport a DS-1 signal. The
         requirements for such transport are defined in the references below in
         Section 8.4.2.6.

8.4.2.5  Additional Technical Requirements for Optical Loop Feeder

         In addition to the requirements set forth above, Pac-West may designate
         that Loop Feeder will transport DS-3 and OC-n (where "n" is defined in
         the technical reference in Section 8.4.1.2.4.4). The requirements for
         such transport are defined in the references below in Section 8.4.2.6.

8.4.2.6  In accordance with Sections 1.3.1 and 1.3.2 of Part A of this
         Agreement, U S WEST shall offer Loop Feeder in compliance with the
         requirements set forth in the following Technical References:

     8.4.2.6.1    Bellcore Technical Requirement TR-NWT-000499, Issue 5,
                  December 1993, section 7 for DS-1 interfaces;

     8.4.2.6.2    Bellcore TR-NWT-000057, Functional Criteria for Digital Loop
                  Carrier Systems, Issue 2, January 1993;

     8.4.2.6.3    Bellcore TR-NWT-000393, Generic Requirements for ISDN Basic
                  Access Digital Subscriber Lines;

     8.4.2.6.4    ANSI T1.106-1988, American National Standard for
                  Telecommunications - Digital Hierarchy - Optical Interface
                  Specifications (Single Mode);

     8.4.2.6.5    ANSI T1.105-1995, American National Standard for
                  Telecommunications - Synchronous Optical Network (SONET) -
                  Basic Description including Multiplex Structure, Rates and
                  Formats;

     8.4.2.6.6    ANSI T1.102-1993, American National Standard for
                  Telecommunications - Digital Hierarchy - Electrical
                  Interfaces;

     8.4.2.6.7    ANSI T1.403-1989, American National Standard for
                  Telecommunications - Carrier to Subscriber Installation, DS-1
                  Metallic Interface Specification; and

                                       23
<PAGE>

                           8.4.2.6.8    Bellcore GR-253-CORE, Synchronous
                                        Optical (SONET), Common Generic
                                        Criteria.

                      8.4.2.7 Interface Requirements

                               8.4.2.7.1     The Loop Feeder point of
                                             termination ("POT") central office
                                             will be as follows:

                                             8.4.2.7.1.1  Copper twisted pairs
                                                          shall terminate on a
                                                          MDF;

                                             8.4.2.7.1.2  DS-1 Loop Feeder shall
                                                          terminate on a DCS1/0
                                                          or DCS3/1; and

                                             8.4.2.7.1.3  Fiber optic cable
                                                          shall terminate on a
                                                          light guide
                                                          termination panel or
                                                          equivalent.

                               8.4.2.7.2     In accordance with Sections 1.3.1
                                             and 1.3.2 Agreement, Loop Feeder
                                             shall be equal to or the applicable
                                             interface requirements set fort
                                             technical references:

                                             8.4.2.7.2.1 Bellcore TR-TSY-000008,
                                             Between the SLC 96 Digital Loop
                                             Carrier System and a local Digital
                                             Switch, Issue 2, August 1987;

                                             8.4.2.7.2.2 Bellcore TR-NWT-000303,
                                             Integrated Digital Loop Carrier
                                             System Generic Requirements,
                                             Objectives and Interface Issue 2,
                                             December 1992; Rev. 1, December 1
                                             December 1993; and

                                             8.4.2.7.2.3 Bellcore Integrated
                                             Digital Loop Carrier System Generic
                                             Requirements, Objectives and
                                             Interface, Issue 1, September 1995.

9.       Distribution

         9.1      Definition:

                  9.1.1    Distribution provides connectivity between the NID
                           component of Loop Distribution and the terminal block
                           on the subscriber-side of an FDI. The FDI is a device
                           that terminates the Distribution Media and the Loop
                           Feeder, and cross-connects them in order to provide a
                           continuous transmission path between the NID and a
                           telephone company central office. There are three (3)
                           basic types of feeder-distribution connections: (a)
                           multiple (splicing of multiple distribution pairs
                           onto one (1) feeder pair); (b) dedicated ("home
                           run"); and (c) interfaced ("cross-connected"). While
                           older plant uses multiple and dedicated methods,
                           newer plant and all plant that uses DLC or other
                           pair-gain technology necessarily uses the interfaced
                           connection method. The feeder-distribution interface
                           ("FDI") in the interfaced design makes

                                       24
<PAGE>

                  use of a manual cross-connection, typically housed inside an
                  outside plant device ("green box") or in a vault or manhole.

         9.1.2    The Distribution may be copper twisted pair, coax cable,
                  single or multi-mode fiber optic cable or other technologies.
                  A combination that includes two (2) or more of these media is
                  also possible. In certain cases, Pac-West shall require a
                  copper twisted pair Distribution even in instances where the
                  Distribution for services that U S WEST offers is other than a
                  copper facility. Special construction charges may apply if no
                  copper twisted pair facilities are available.

9.2      Requirements for All Distribution

         9.2.1    Distribution shall be capable of transmitting signals for the
                  following services, as requested by Pac-West:

                  9.2.1.1  two-wire & four-wire analog voice grade loops; and

                  9.2.1.2  two-wire & four-wire loops conditioned to transmit
                           the digital signals needed to provide digital
                           services.

         9.2.2    Distribution shall transmit all signaling messages or tones.
                  Where the Distribution includes any active elements that
                  terminate any of the signaling messages or tones, these
                  messages or tones shall be reproduced by the Distribution at
                  the interfaces to an adjacent Network Element in a format that
                  maintains the integrity of the signaling messages or tones.

         9.2.3    U S WEST shall not interfere with Pac-West's ability to
                  support functions associated with provisioning, maintenance,
                  performance monitoring and testing of the unbundled
                  Distribution.

         9.2.4    Distribution shall be equal to or better than all of the
                  applicable requirements set forth in the following technical
                  references:

                  9.2.4.1  Bellcore TR-TSY-000057, "Functional Criteria for
                           Digital Loop Carrier Systems"; and

                  9.2.4.2  Bellcore TR-NWT-000393, "Generic Requirements for
                           ISDN Basic Access Digital Subscriber Lines".

9.3      Additional Requirements for Special Copper Distribution In addition to
         Distribution that supports the requirements set forth in Section 9.2.
         above, Pac-West may designate Distribution to be copper twisted pair
         unfettered by any intervening equipment (e.g., filters, load coils,
         range extenders) so that Pac-West can use these loops for a variety of
         services by attaching appropriate terminal equipment at the ends.

                                       25
<PAGE>

9.4      Additional Requirements for Fiber Distribution

         Fiber optic cable Distribution shall be capable of transmitting signals
         for the following services in addition to the those set forth in
         Section 9.2.1 above:

         9.4.1    DS-3 rate private line service;

         9.4.2    Optical SONET OC-n rate private lines (where "n" is defined in
                  the technical reference in Section 8.4.1.2.4.4); and

         9.4.3    Where available in the U S WEST network, Analog Radio
                  Frequency based services (e.g., Cable Television (CATV)).

9.5      Additional Requirements for Coaxial Cable Distribution

         Where available in the U S WEST network, coaxial cable (coax)
         Distribution shall be capable of transmitting signals for the following
         services in addition to those set forth in Section 9.2.1 above:

         9.5.1    Broadband data, either one way or bi-directional, symmetric or
                  asymmetric, at rates between 1.5 Mb/s and 45 Mb/s; and

         9.5.2    Analog Radio Frequency based services (e.g., CATV).

9.6      Interface Requirements

         9.6.1    Signal transfers between the Distribution and the NID and an
                  adjacent Network Element shall have levels of degradation that
                  are within the performance requirements set forth in Section
                  18.2 of this Attachment.

         9.6.2    Distribution shall be at least equal to each of the applicable
                  interface requirements set forth in the following technical
                  references:

                  9.6.2.1  Bellcore TR-NWT-000049, "Generic Requirements for
                           Outdoor Telephone Network Interface Devices", issued
                           December 1, 1994;

                  9.6.2.2  Bellcore TR-NWT-000057, "Functional Criteria for
                           Digital Loop Carrier Systems", issued January 2,
                           1993;

                  9.6.2.3  Bellcore TR-NWT-000393, "Generic Requirements for
                           ISDN Basic Access Digital Subscriber Lines"; and

                  9.6.2.4  Bellcore TR-NWT-000253, SONET Transport Systems:
                           Common Criteria (A module of TSGR, FR-NWT-000440),
                           Issue 2, December 1991.

                                       26
<PAGE>

10.      Local Switching

         10.1     Definition:

                  10.1.1   Local Switching is the Network Element that provides
                           the functionality required to connect the appropriate
                           lines or trunks wired to the Main Distributing Frame
                           ("MDF") or Digital Cross Connect ("DSX") panel to a
                           desired line or trunk. The desired connection path
                           for each call type will vary by subscriber and will
                           be specified by Pac-West as a routing scenario that
                           will be implemented in advance as part of or after
                           the purchase of the unbundled Local Switching. Such
                           functionality shall include all of the features,
                           functions, and capabilities that the underlying U S
                           WEST local switch is capable of providing(8),
                           including, but not limited to: line signaling and
                           signaling software, digit reception, dialed number
                           translations, call screening, routing, recording,
                           call supervision, dial tone, switching, telephone
                           number provisioning, announcements, calling features
                           and capabilities (including call processing),
                           Centrex, or Centrex-like services, Automatic Call
                           Distributor ("ACD"), Carrier pre-subscription (e.g.,
                           long distance carrier, intraLATA toll), Carrier
                           Identification Code ("CIC"), number portability
                           capabilities, testing and other operational features
                           inherent to the switch and switch software. The Local
                           Switching function also provides access to transport,
                           signaling (ISDN User Part ("ISUP") and Transaction
                           Capabilities Application Part ("TCAP"), and platforms
                           such as adjuncts, Public Safety Systems (911),
                           Operator Services, Directory Assistance Services and
                           Advanced Intelligent Network ("AIN"). Remote
                           Switching Module functionality is included in the
                           Local Switching function. Local Switching shall also
                           be capable of routing local, intraLATA, interLATA,
                           and international calls to the subscriber's preferred
                           carrier, call features (e.g., call forwarding) and
                           Centrex capabilities.

                  10.1.2   Local Switching, including the ability to route to
                           Pac-West's transport facilities, dedicated facilities
                           and systems, shall be unbundled from all other
                           unbundled Network Elements, i.e., Operator Systems,
                           Common Transport, Shared Transport and Dedicated
                           Transport.

         10.2     Technical Requirements

                  10.2.1   Local Switching shall be equal to or better than the
                           requirements for Local Switching set forth in
                           Bellcore's Local Switching Systems General
                           Requirements FR-NWT000064.

                           10.2.1.1      U S WEST shall route calls to the
                                         appropriate trunk or lines for call
                                         origination or termination.

                           10.2.1.2      U S WEST shall route calls on a per
                                         line or per screening class basis to
                                         (a) U S WEST platforms providing
                                         Network Elements or additional
                                         requirements, (b) Pac-West designated
                                         platforms, or (c) third-party
                                         platforms.

----------

8        MCIm Order, p. 25 and AT&T Order at Issue 18.

                                       27
<PAGE>

                         10.2.1.3       U S WEST shall provide to Pac-West
                                        recorded announcements as furnished by
                                        Pac-West and call progress tones to
                                        alert callers of call progress and
                                        disposition. The installation cost shall
                                        be borne by Pac-West for such
                                        announcements and call progress tones to
                                        the extent they are different than those
                                        standardly used by U S WEST.

                         10.2.1.4       U S WEST shall change a subscriber from
                                        U S WEST's services to Pac-West's
                                        services without loss of feature
                                        functionality, unless designated
                                        otherwise by Pac-West.

                         10.2.1.5       U S WEST shall perform routine testing
                                        (e.g., Mechanized Loop Tests ("MLT") and
                                        test calls such as 105, 107 and 108 type
                                        calls) and fault isolation on Pac-West's
                                        unbundled Network Elements, as
                                        designated by Pac-West

                         10.2.1.6       U S WEST shall repair and restore any
                                        equipment or any other maintainable
                                        component that may adversely impact
                                        Pac-West's use of unbundled Local
                                        Switching.

                         10.2.1.7       U S WEST shall control congestion points
                                        such as mass calling events and network
                                        routing abnormalities using capabilities
                                        such as Automatic Call Gapping,
                                        Automatic Congestion Control, and
                                        Network Routing Overflow. Application of
                                        such control shall be competitively
                                        neutral and not favor any user of
                                        unbundled switching or U S WEST.

                         10.2.1.8       U S WEST shall perform manual call trace
                                        as designated by Pac-West and shall
                                        permit subscriber originated call trace.

                         10.2.1.9       U S WEST shall record all billable
                                        events, involving usage of the Network
                                        Element, and send the appropriate
                                        recording data to Pac-West as further
                                        described in Attachment 5.

                         10.2.1.10      For Local Switching used as E911
                                        tandems, U S WEST shall allow
                                        interconnection with Pac-West switches
                                        in that same local switch used as a E911
                                        tandem and shall route calls to the
                                        appropriate Public Safety Access Point
                                        (PSAP). In the event the Local Switching
                                        element and the E911 tandem are
                                        contained within the same U S WEST
                                        switch, such trunking shall be provided
                                        on an intra-switch basis.

                         10.2.1.11      Where U S WEST provides the following
                                        special services, it shall provide to
                                        Pac-West:

                                        10.2.1.11.1    essential Service Lines;

                                        10.2.1.11.2    Telephone Service
                                                       Prioritization ("TSD");

                                        10.2.1.11.3    related services for
                                                       handicapped;

                                       28
<PAGE>

                                        10.2.1.11.4    where U S WEST provides
                                                       soft dial tone, it shall
                                                       do so on a
                                                       competitively-neutral
                                                       basis; and

                                        10.2.1.11.5    any other service
                                                       required by law or
                                                       regulation.

                         10.2.1.12      U S WEST shall provide Switching Service
                                        Point ("SSP") capabilities and signaling
                                        software to interconnect the signaling
                                        links destined to the Signaling Transfer
                                        Point Switch ("STP"). In the event Local
                                        Switching is provided out of a switch
                                        without SS7 capability, the Tandem shall
                                        provide this capability as further
                                        described in Section 4 of this
                                        Attachment. These capabilities shall
                                        adhere to Bellcore specifications TCAP
                                        (GR-1432-CORE),  ISLIP (GR-905-CORE),
                                        Call Management (GR-1429-CORE), Switched
                                        Fractional DS1 (GR-1357CORE), Toll Free
                                        Service (GR-1428-CORE), Calling Name
                                        (GR-1597-CORE), Line Information
                                        Database (GR-954-CORE), and Advanced
                                        Intelligent Network (GR-2863-CORE).

                         10.2.1.13      U S WEST shall provide interfaces to
                                        adjuncts through industry standard and
                                        Bellcore interfaces. These adjuncts may
                                        include, but are not limited to, Service
                                        Node, Service Circuit Node, Voice Mail
                                        and Automatic Call Distributors.
                                        Examples of existing interfaces are ANSI
                                        ISDN standards Q.931 and Q.932.

                         10.2.1.14      Upon Pac-West's request, U S WEST shall
                                        provide performance data regarding a
                                        subscriber line, traffic characteristics
                                        or other measurable elements to Pac-West

                         10.2.1.15      U S WEST shall offer all technically
                                        feasible Local Switching features, and,
                                        in providing such features, do so at
                                        parity with those provided by U S WEST
                                        to itself or any other Person.

                                        10.2.1.15.1 Such feature offerings shall
                                                    include, but are not limited
                                                    to: Basic and primary rate
                                                    ISDN; Residential features;
                                                    Custom Local Area Signaling
                                                    Services (CLASS/LASS);
                                                    Custom Calling Features; and
                                                    Centrex (including
                                                    equivalent administrative
                                                    capabilities, such as
                                                    subscriber accessible
                                                    reconfiguration and detailed
                                                    message recording).

                                        10.2.1.15.2(9) Pac-West may use the Bona
                                                       Fide Request process set
                                                       forth in Part A of this
                                                       Agreement to request
                                                       unbundling of Advanced
                                                       Intelligent Network
                                                       ("AIN")

----------

9        MCIm Order, p. 7 at Issue 9(b) and AT&T Order Issue 19. The Order
         states that AIN triggers must be unbundled when technically feasible
         without harm to the network. The BFR process incorporates this
         standard, so the following changes rely on that process to address
         future AIN trigger unbundling.

                                       29
<PAGE>

                                        triggers supporting Pac-West and U S
                                        WEST service applications in U S WEST's
                                        SCPs. U S WEST shall offer AIN-based
                                        services in accordance with applicable
                                        technical references. Such services may
                                        include, but are not limited to:

                                        10.2.1.15.2.1    Off-Hook Immediate;
                                        10.2.1.15.2.2    Off-Hook Delay;
                                        10.2.1.15.2.3    Private EAMF Trunk;
                                        10.2.1.15.2.4    Shared Interoffice
                                                         Trunk (EAMF, SS7);
                                        10.2.1.15.2.5    Termination Attempt;
                                        10.2.1.15.2.6    3/6/10;
                                        10.2.1.15.2.7    N11;
                                        10.2.1.15.2.8    Feature Code Dialing;
                                        10.2.1.15.2.9    Custom Dialing Plan(s),
                                                         including 555 services;
                                                         and
                                        10.2.1.15.2.10   Automatic Route
                                                         Selection.

               10.2.1.16      U S WEST shall assign each Pac-West subscriber
                              line the class of service designated by Pac-West
                              (e.g., using line class codes or other switch
                              specific provisioning methods), and at Pac-West's
                              option shall route Directory Assistance calls from
                              Pac-West subscribers as directed by Pac-West. This
                              includes each of the following call types:

                              10.2.1.16.1      0+/0- calls;
                              10.2.1.16.2      911 calls;
                              10.2.1.16.3      411/DA calls;
                              10.2.1.16.4      InterLATA calls specific to PIC
                                               or regardless of PIC;
                              10.2.1.16.5      IntraLATA calls specific to PIC
                                               or regardless of PIC;
                              10.2.1.16.6      Toll free calls, prior to
                                               database query;
                              10.2.1.16.7      Call forwarding of any type
                                               supported on the switch,
                                               to a line or a trunk; and

                                       30
<PAGE>

                      10.2.1.16.8       Any other customized routing that may be
                                        supported by the U S WEST switch.

         10.2.1.17    U S WEST shall assign each Pac-West subscriber line the
                      class of service designated by Pac-West (e.g., using line
                      class codes or other switch specific provisioning methods)
                      and shall route operator calls from Pac-West subscribers
                      as directed by Pac-West at Pac-West's option. For example,
                      U S WEST may translate 0- and 0+ intraLATA traffic, and
                      route the call through appropriate trunks to an Pac-West
                      Operator Services Position System ("OSPS"). Calls from
                      Local Switching must pass the ANI-11 digits unchanged.

         10.2.1.18    If an Pac-West customer subscribes to Pac-West provided
                      voice mail and messaging services, U S WEST shall redirect
                      incoming calls to the Pac-West system based upon
                      designated service arrangements (e.g., busy, don't answer,
                      number of rings). In addition, U S WEST shall provide a
                      Standard Message Desk Interface-Enhanced (SMDI-E)
                      interface to the Pac-West system. U S WEST shall support
                      the Interswitch Voice Messaging Service (IVMS) capability.

         10.2.1.19    Local Switching shall be offered in accordance with the
                      requirements of the following technical references and
                      their future releases:

                      10.2.1.19.1 GR-1298-CORE, AIN Switching System Generic
                      Requirements;

                      10.2.1.19.2  GR-1299-CORE,  AIN Switch-Service Control
                      Point (SCP)/Adjunct  Interface Generic Requirements;

                      10.2.1.19.3 TR-NWT-001284, AIN 0.1 Switching System
                      Generic Requirements; and

                      10.2.1.19.4 SR-NWT-002247, AIN Release 1 Update.

10.2.2 Interface Requirements:

     10.2.2.1     U S WEST shall provide the following interfaces to Loops:

         10.2.2.1.1   Standard Tip/Ring interface, including loopstart or
                      groundstart, on-hook signaling (e.g., for calling number,
                      calling name and message waiting lamp);

         10.2.2.1.2   Coin phone signaling capability;(10)

         10.2.2.1.3   Basic Rate Interface ISDN adhering to ANSI standards
                      Q.931, Q.932 and appropriate Bellcore Technical
                      Requirements;

----------

10       Procedural Order, July 14, 1997, at pages 17-18.

                                       31
<PAGE>

                  10.2.2.1.4   Two-wire analog interface to PBX to include
                               reverse battery, E&M, wink start and DID;

                  10.2.2.1.5   Four-wire analog interface to PBX to include
                               reverse battery, E&M, wink start and DID;

                  10.2.2.1.6   Four-wire DS-1 interface to PBX or subscriber
                               provided equipment (e.g., computers and voice
                               response systems);

                  10.2.2.1.7   Primary Rate ISDN to PBX adhering to ANSI
                               standards Q.931, Q.932 and appropriate Bellcore
                               Technical Requirements;

                  10.2.2.1.8   Switched Fractional DS-1 with capabilities to
                               configure Nx64 channels (where "n" = 1 to 24);
                               and

                  10.2.2.1.9   Loops adhering to Bellcore TR-NWT-08 and
                               TR-NWT-303 specifications to interconnect Digital
                               Loop Carriers.

                  10.2.2.2     U S WEST shall provide access to the following,
                               but not limited to:

                  10.2.2.2.1   SS7 Signaling Network or Multi-Frequency
                               trunking, if requested by Pac-West;

                  10.2.2.2.2   Interface to Pac-West operator services systems
                               or Operator Services through appropriate trunk
                               interconnections for the system; and

                  10.2.2.2.3   Interface to Pac-West Directory Assistance
                               Services through the Pac-West switched network or
                               to Directory Services through the appropriate
                               trunk interconnections for the system; and 950
                               access or other Pac-West required access to
                               interexchange carriers as requested through
                               appropriate trunk interfaces.

10.3     Customized Routing

         10.3.1   Description

                  Customized routing will enable Pac-West to direct particular
                  classes of calls to particular outgoing trunks based upon line
                  class codes. Pac-West may use customized routing to direct its
                  customers' calls to 411, 555-1212, 0+ or 0-, to its own
                  Operator Services platform and Directory Assistance platform.

         10.3.2   Limitations

                  Because there is a limitation in the technical feasibility of
                  offering custom routing beyond the capacity of the 1A ESS
                  switch, custom routing will be offered to CLECs on a
                  first-come, first-served basis.

                                       32
<PAGE>

10.4     Integrated Services Digital Network (ISDN)

         10.4.1   Integrated Services Digital Network ("ISDN") is defined in two
                  (2) variations. The first variation is Basic Rate ISDN
                  ("BRI"). BRI consists of 2 Bearer (B) Channels and one Data
                  (D) Channel. The second variation is Primary Rate ISDN
                  ("PRI"). PRI consists of 23 B Channels and one D Channel. Both
                  BRI and PRI B Channels may be used for voice, Circuit Switched
                  Data ("CSD") or Packet Switched Data ("PSD"). The BRI D
                  Channel may be used for call related signaling, non-call
                  related signaling or packet switched data. The PRI D Channel
                  may be used for call related signaling.

         10.4.2   Technical Requirements -ISDN

                  10.4.2.1     U S WEST shall offer Data Switching providing
                               ISDN that, at a minimum:

                  10.4.2.2     provides integrated Packet handling capabilities;

                  10.4.2.3     allows for full 2B+D Channel functionality for
                               BRI; and

                  10.4.2.4     allows for full 23B+D Channel functionality for
                               PRI.

                  10.4.2.5     Each B Channel shall allow for voice, 64 Kbps
                               CSD, and PSD of 128 logical channels at minimum
                               speeds of 19 Kbps throughput of each logical
                               channel up to the total capacity of the B
                               Channel.

                  10.4.2.6     Each B Channel shall provide capabilities for
                               alternate voice and data on a per call basis.

                  10.4.2.7     The BRI D Channel shall allow for call associated
                               signaling, non-call associated signaling and PSD
                               of 16 logical channels at minimum speeds of 9.6
                               Kbps throughput of each logical channel up to the
                               total capacity of the D channel.

                  10.4.2.8     The PRI D Channel shall allow for call associated
                               signaling.

          10.4.3 Interface Requirements - ISDN

                   10.4.3.1     US WEST shall provide the BRI interface using
                                Digital Subscriber Loops adhering to Bellcore
                                TR-NWT-303 Specifications to Interconnect
                                Digital Loop Carriers.

                   10.4.3.2     U S WEST shall offer PSD interfaces adhering to
                                the X.25, X.75 and X.75'ANSI and Bellcore
                                requirements.

                   10.4-3.3     U S WEST shall offer PSD trunk interfaces
                                operating at 56 Kbps.

                                       33
<PAGE>

11.      Network Interface Device

         11.1     Definition:

                  11.1.1   The Network Interface Device ("NID") is a single-line
                           termination device or that portion of a multiple-line
                           termination device required to terminate a single
                           line or circuit. One of the functions of the NID is
                           to establish the network demarcation point between a
                           carrier and its subscriber. The NID features two (2)
                           independent chambers or divisions which separate the
                           service provider's network from the subscriber's
                           inside wiring. Each chamber or division contains the
                           appropriate connection points or posts to which the
                           service provider and the subscriber each make their
                           connections.

                  11.1.2   Pac-West may connect its NID to U S WEST's NID.

                  11.1.3   U S WEST will allow Pac-West to locate dropwires,
                           other than U S WEST's drop wires, inside an existing
                           U S WEST combination NID used in the provisioning of
                           telephone service for single tenant end users subject
                           to the following conditions:

                           11.1.3.1     Sufficient space exists inside the
                                        combination NID to allow proper
                                        installation of equipment in accordance
                                        with the NID manufacturers
                                        specifications and per the National
                                        Electric Code;

                           11.1.3.2     In order to maintain maintenance
                                        integrity for the NID, Pac-West will
                                        install its own overvoltage protection
                                        and customer bridging equipment,
                                        terminate the dropwires to that
                                        equipment, and assume all operational
                                        responsibilities and liabilities for
                                        that equipment;

                           In the event sufficient space is not available in the
                           existing US WEST NID, to accommodate additional
                           drops, Pac-West will be allowed to install and
                           additional NID, at its own expense and the Pac-West's
                           NID can be connected to the existing U S WEST NID;

                           If the existing NID is not the new generation modular
                           type, Pac-West may install a new NID. U S WEST will
                           be allowed to move its drop wire to the new NID and
                           remove the old NID;

                           Within ninety (90) days of the Effective Date of this
                           Agreement, the Parties agree to jointly develop a
                           satisfactory process to address the issues with
                           access to single and multi-party NIDs.

                  11.1.4   With respect to multiple-line termination devices,
                           Pac-West shall specify the quantity of NIDs it
                           requires within such device.

         11.2     Technical Requirements

                  11.2.1   The NID shall provide a clean, accessible point of
                           connection for the inside wiring and for the
                           Distribution Media and/or cross connect to Pac-West's
                           NID and shall maintain a connection to ground meeting
                           the requirements as set forth below.

                                       34
<PAGE>

                  11.2.2  The NID shall be capable of transferring electrical
                          analog or digital signals be the subscriber's inside
                          wiring and the Distribution Media and/or cross connect
                          to Pac-West's NID.

                  11.2.3   All NID posts or connecting points shall be in place,
                           secure, usable and free rust or corrosion. The
                           protective ground connection shall exist and be
                           properly installed. The ground wire shall be free of
                           rust and corrosion and have contin ground.

                  11.2.4   The NID shall be capable of withstanding all normal
                           local environmental variations.

                  11.2.5   Where the NID is not located in a larger, secure
                           cabinet or closet, the NID shall be protected from
                           vandalism. The NID shall be accessible to Pac-West
                           designated personnel. In cases where entrance to the
                           subscriber premises is required access to the NID,
                           Pac-West shall obtain entrance permission directly
                           from the subscriber.

                  11.2.6   U S WEST shall offer the NID together with, and
                           separately from, the Distribution Media component of
                           Loop Distribution.

         11.3     Interface Requirements

                  11.3.1   The NID shall be the interface to subscribers'
                           premises wiring for all loops.

                  11.3.2   The NID shall be at least equal to all the industry
                           standards for NIDs set forth following technical
                           references:

                           11.3.2.1     Bellcore Technical Advisory
                                        TA-TSY-000120 "Subscriber Premises
                                        Network Ground Wire";

                           11.3.2.2     Bellcore Generic Requirement GR-49-CORE
                                        "Generic Requirements for Outdoor
                                        Telephone Network Interface Devices";

                           11.3.2.3     Bellcore Technical Requirement
                                        TR-NWT-00239 "Indoor Telephone Network
                                        Interfaces";

                           11.3.2.4     Bellcore Technical Requirement
                                        TR-NWT-000937 "G Requirements for
                                        Outdoor and Indoor Building Entrance";
                                        and

                           11.3.2.5     Bellcore Technical Requirement
                                        TR-NWT-0001 33 "Generic Requirements for
                                        Network Inside Wiring."

12.      Operator Systems

         See Part A.

13.      E911

                                       35
<PAGE>

See Part A.

14.      Directory Assistance Data

         See Part A.

15.      Signaling Link Transport

         15.1     Definition:

                  Signaling Link Transport is a set of two (2) or four (4)
                  dedicated 56 Kbps transmission paths between
                  Pac-West-designated Signaling Points of Interconnection
                  ("SPOI") that provides appropriate physical diversity and a
                  cross connect at a U S WEST STP site.

         15.2     Technical Requirements

                  15.2.1   Signaling Link Transport shall consist of full duplex
                           mode 56 Kbps transmission paths.

                  15.2.2   Of the various options available, Signaling Link
                           Transport shall perform in the following two ways:

                           15.2.1.1     as an "Mink" which is a connection
                                        between a switch or SCP and a home
                                        Signaling Transfer Point ("STP") pair,
                                        and

                           15.2.1.2     as a "D-link" which is a connection
                                        between two (2) STP pairs in different
                                        company networks (e.g., between two (2)
                                        STP pairs for two (2) (CLECs)).

                  15.2.3   Signaling Link Transport shall consist of two (2) or
                           more signaling link layers as follows:

                           15.2.3.1    An A-link layer shall consist of two (2)
                                       links.

                           15.2.3.2    A D-link layer shall consist of four (4)
                                       links.

                  15.2.4   A signaling link layer shall satisfy a performance
                           objective such that:

                           15.2.4.1     there shall be no more than two (2)
                                        minutes down time per year for an A-link
                                        layer transport only, and

                           15.2.4.2     there shall be negligible (less than 2
                                        seconds) down time per year for a D-link
                                        layer transport only.

                  15.2.5   Where available, a signaling link layer shall satisfy
                           interoffice and intraoffice diversity of facilities
                           and equipment, such that:

                                       36
<PAGE>

                           15.2.5.1     no single failure of facilities or
                                        equipment causes the failure of both
                                        links in an A-link layer (i.e., the
                                        links should be provided on a minimum of
                                        two (2) separate physical paths
                                        end-to-end); and

                           15.2.5.2     no two concurrent failures of facilities
                                        or equipment shall cause the failure of
                                        all four (4) links in a D-link layer
                                        (i.e., the links should be provided on a
                                        minimum of three (3) separate physical
                                        paths end-to-end).

                  15.2.6   For requested link layers, US WEST will provide
                           Pac-West with the level of diversity available.

         15.3     Interface Requirements

                  15.3.1   There shall be a DS-1 (1.544 Mbps) interface at the
                           Pac-West-designated SPOIs. Each 56 Kbps transmission
                           path shall appear as a DS-0 channel within the DS-1
                           interface.

16.      Signaling Transfer Points (STPs)

         16.1     Definition:

                  Signaling Transfer Points ("STP"s) provide functionality that
                  enable the exchange of SS7 messages among and between
                  switching elements, database elements and signaling transfer
                  points.

         16.2     Technical Requirements

                  16.2.1   STPs shall provide signaling access to all other
                           Network Elements connected to the U S WEST SS7
                           network. These include:

                           16.2.1.1     U S WEST Local Switching or Tandem
                                        Switching;

                           16.2.1.2     U S WEST Service Control
                                        Points/DataBases connected to or
                                        resident on service control points;

                           16.2.1.3     Third-party local or tandem switching
                                        systems connected to the U S WEST
                                        signaling network; and

                           16.2.1.4     Third-party-provided STPs connected to
                                        the U S WEST signaling network.

                  16.2.2   The connectivity provided by STPs shall fully support
                           the functions of all other Network Elements connected
                           to U S WEST's SS7 network. This includes the use of
                           U S WEST's SS7 network to convey messages which
                           neither originate nor terminate at a signaling end
                           point directly connected to the U S WEST SS7 network
                           (i.e., transit messages). When the U S WEST SS7
                           network is used to convey transit messages, there
                           shall be no alteration of the Integrated Services
                           Digital

                                       37
<PAGE>

         Network User Part ("ISDNUP") or Transaction Capabilities Application
         Part ("TCAP") user data that constitutes the content of the message.

16.2.3   If a U S WEST tandem switch routes traffic, based on dialed or
         translated digits, on SS7 trunks between an Pac-West local switch and
         third party local switch, U S WEST's SS7 network shall convey the TCAP
         messages necessary to provide Call Management features (automatic
         callback, automatic recall, and screening list editing) between the
         Pac-West local STPs and the STPs that provide connectivity with the
         third party local switch, even if the third party local switch is not
         directly connected to U S WEST's STPs.

16.2.4   STPs shall provide all functions of the MTP as specified in ANSI T1.111
         (Reference 12.5.2). This includes:

          16.2.4.1 Signaling Data Link functions, as specified in ANSI T1.
                   111.2;

          16.2.4.2 Signaling Link functions, as specified in ANSI T1. 111.3; and

          16.2.4.3 Signaling Network Management functions, as specified in ANSI
                   T1.111.4.

16.2.5   STPs shall provide all functions of the SCCP necessary for Class 0
         (basic connectionless) service, as specified in ANSI T1.112. In
         particular, this includes Global Title Translation ("GTT") and SCCP
         Management procedures, as specified in ANSI T1. 112.4.

16.2.6   In cases where the destination signaling point is either a U S WEST
         local or tandem switching system or data base, or is an Pac-West or
         third party local or tandem switching system directly connected to U S
         WEST's SS7 network, U S WEST STPs shall perform final GTT of messages
         to the destination and SCCP Subsystem Management of the destination. In
         all other cases, STPs shall perform intermediate GTT of messages to a
         gateway pair of STPs in an SS7 network connected with the U S WEST SS7
         network, and shall not perform SCCP Subsystem Management of the
         destination.

16.2.7   STPs shall also provide the capability to route SCCP messages based on
         ISNI, as specified in ANSI T1. 118, when this capability becomes
         available on U S WEST STPs.

16.2.8   STPs shall provide all functions of the OMAP commonly provided by STPs,
         as specified in the reference in Section 16.5.6. This includes:

          16-2.8.1 MTP Routing Verification Test ("MRVT"); and,

          16.2.8.2SCCP Routing Verification Test ("SRVT").

16.2.9   In cases where the destination signaling point is either a U S WEST
         local or tandem switching system or database, or is an Pac-West or
         third party local or tandem switching system directly connected to the
         U S WEST SS7 network, STPs shall perform MRVT and SRVT to the
         destination signaling point. In all other cases,

                                       38
<PAGE>

                  STPs shall perform MRVT and SRVT to a gateway pair of STPs in
                  an SS7 network connected with the U S WEST SS7 network. This
                  requirement shall be superseded by the specifications for
                  inter-network MRVT and SRVT if and when these become approved
                  ANSI standards and available capabilities of U S WEST STPs.

         16.2.10  STPs shall be equal to or better than the following
                  performance requirements:

                  16.2.10.1     MTP Performance, as specified in ANSI T1. 111.6;
                                and

                  16.2.10.2    SCCP Performance, as specified in ANSI T1. 112.5.

16.3     Interface Requirements

                  16.3.1   U S WEST shall provide the following STPs options to
                           connect Pac-West or Pac-West-designated local
                           switching systems or STPs to the U S WEST SS7
                           network:

                           16.3.1.1 An A-link interface from Pac-West local
                                    switching systems.

                  16.3.2   Each type of interface shall be provided by one or
                           more sets (layers) of signaling links, as follows:

                           16.3.2.1 An A-link layer shall consist of two (2)
                                    links.

                  16.3.3   The Signaling Point of Interconnection ("SPOI") for
                           each link shall be located at a cross-connect
                           element, such as a DSX-1, in the central office where
                           the U S WEST STPs are located. There shall be a DS-1
                           or higher rate transport interface at each of the
                           SPOls. Each signaling link shall appear as a DS-0
                           channel within the DS-1 or higher rate interface.

                           U S WEST shall offer higher rate DS-1 signaling for
                           interconnecting Pac-West local switching systems or
                           STPs with US WEST STPs as soon as these become
                           approved ANSI standards and available capabilities in
                           U S WEST's network.

                  16.3.4   U S WEST shall provide MTP and SCCP protocol
                           interfaces that shall conform to all relevant
                           sections in the following specifications:

                           16.3.4.1     Bellcore GR-905-CORE, Common Channel
                                        Signaling Network Interface
                                        Specification (CCSNIS) Supporting
                                        Network Interconnection, Message
                                        Transfer Part (MTP), and Integrated
                                        Services Digital Network User Part
                                        (ISDNUP); and

                           16.3.4.2     Bellcore GR-1432-CORE, CCS Network
                                        Interface Specification (CCSNIS)
                                        Supporting Signaling Connection Control
                                        Part (SCCP) and Transaction Capabilities
                                        Application Part (TCAP).

         16.4     Message Screening

                  16.4.1   U S WEST shall set message screening parameters in
                           order to accept messages from Pac-West local or
                           tandem switching systems destined to any signaling
                           point in

                                       39
<PAGE>

                           the U S WEST SS7 network with which the Pac-West
                           switching system has a signaling relation.

                  16.4.2   U S WEST shall set message screening parameters in
                           order to accept messages from Pac-West local or
                           tandem switching systems destined to any signaling
                           point or network interconnected to the U S WEST SS7
                           network with which the Pac-West switching system has
                           a signaling relation.

                  16.4.3   U S WEST shall set message screening parameters in
                           order to accept messages destined to an Pac-West
                           local or tandem switching system from any signaling
                           point or network interconnected to the U S WEST SS7
                           network with which the Pac-West switching system has
                           a signaling relation.

                  16.4.4   U S WEST shall set message screening parameters in
                           order to accept and send messages destined to an
                           Pac-West SCP from any signaling point or network
                           interconnected to the U S WEST SS7 network with which
                           the Pac-West SCP has a signaling relation.

         16.5     STP Requirements

                  16.5.1   Subject to the provisions of Sections 1.3.1 and 1.3.2
                           of Part A of this Agreement, STPs shall be equal to
                           or better than all of the requirements for STPs set
                           forth in the following technical references:

                  16.5.2   ANSI T1. 111-1992 American National Standard for
                           Telecommunications - Signaling System Number 7 (SS7)
                           - Message Transfer Part (MTP);

                  16.5.3   ANSI T1.111A-1994 American National Standard for
                           Telecommunications Signaling System Number 7 (SS7) -
                           Message Transfer Part (MTP) Supplement;

                  16.5.4   ANSI T1.112-1992 American National, Standard for
                           Telecommunications Signaling System Number 7 (SS7) -
                           Signaling Connection Control Part (SCCP);

                  16.5.5   ANSI T1. 115-1990 American National Standard for
                           Telecommunications - Signaling System Number 7 (SS7)
                           - Monitoring and Measurements for Networks;

                  16.5.6   ANSI T1. 116-1990 American National Standard for
                          Telecommunications  - Signaling System Number 7 (SS7)
                          - Operations, Maintenance and Administration Part
                          (OMAP);

                 16.5.7   ANSI T1. 118-1992 American National Standard for
                          Telecommunications - Signaling System Number 7 (SS7) -
                          Intermediate Signaling Network Identification (ISNI);

                 16.5.8   Bellcore GR-905-CORE, Common Channel Signaling Network
                          Interface Specification (CCSNIS) Supporting Network
                          Interconnection, Message Transfer Part (MTP), and
                          Integrated Services Digital Network User Part
                          (ISDNUP); and

                                       40
<PAGE>

                  16.5.9   Bellcore GR-1432-CORE, CCS Network Interface
                           Specification (CCSNIS) Supporting Signaling
                           Connection Control Part (SCCP) and Transaction
                           Capabilities Application Part (TCAP).

17.      Service Control Points/Data bases

         17.1     Definition:

                  17.1.1   Databases are the Network Elements that provide the
                           functionality for storage of, access to, and
                           manipulation of information required to offer a
                           particular service and/or capability. Databases
                           include, but are not limited to: Number Portability,
                           LIDB, Toll Free Number Database, Automatic Location
                           Identification/Data Management System and AIN.

                  17.1.2   A Service Control Point ("SCP") is a specific type of
                           Database Network Element functionality deployed in a
                           Signaling System 7 ("SS7") network that executes
                           service application logic in response to SS7 queries
                           sent to it by a switching system also connected to
                           the SS7 network. SCPs also provide operational
                           interfaces to allow for provisioning, administration
                           and maintenance of subscriber data and service
                           application data (e.g., a toll free database stores
                           subscriber record data that provides information
                           necessary to route toll free calls).

         17.2     Technical Requirements for SCPs/Databases

                  Requirements for SCPs/Databases within this section address
                  storage of information, access to information (e.g., signaling
                  protocols and response times), and administration of
                  information (e.g., provisioning, administration, and
                  maintenance). All SCPs/Databases shall be provided to Pac-West
                  in accordance with the following requirements, except where
                  such a requirement is superseded by specific requirements set
                  forth in Subparagraphs 17.3 through 17.7 of this Attachment

                  17.2.1   U S WEST shall provide interconnection to SCPs
                           through the U S WEST designated STPs using SS7
                           network and protocols, as specified in Section 16 of
                           this Attachment, with TCAP as the application layer
                           protocol.

                  17.2.2   Regional SCP pairs shall be available pursuant to
                           applicable technical reference documents.

                  17.2.3   U S WEST shall provide to Pac-West database
                           provisioning consistent with the provisioning
                           requirements of this Agreement (e.g., data required,
                           edits, acknowledgments, data format and transmission
                           medium and notification of order completion).

                  17.2.4   The operational interface provided by U S WEST shall
                           complete Database transactions (i.e., add, modify,
                           delete) for Pac-West subscriber records stored in U S
                           WEST databases at parity with which U S WEST
                           provisions its own subscriber records.

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<PAGE>

                  17.2.5   U S WEST shall provide Database maintenance
                           consistent with the maintenance requirements as
                           specified in this Agreement (e.g., notification of U
                           S WEST network affecting events, testing, dispatch
                           schedule and measurement and exception reports).

                  17.2.6   When and where available, U S WEST shall provide
                           billing and recording information to track Database
                           usage consistent with Connectivity Billing and
                           recording requirements as specified in this Agreement
                           (e.g., recorded message format and content,
                           timeliness of feed, data format and transmission
                           medium).

                  17.2.7   U S WEST shall provide SCPs/Databases in accordance
                           with the physical security requirements specified in
                           this Agreement.

                  17.2.8   U S WEST shall provide SCPs/Databases in accordance
                           with the logical security requirements specified in
                           this Agreement.

         17.3     Number Portability Database

                  17.3.1 Definition:

                         The Number Portability ("NP") Database supplies routing
                         numbers for calls involving numbers that have been
                         ported from one local service provider to another. NP
                         database functionality shall also include Global Title
                         Translations ("GTT") for calls involving ported numbers
                         even if U S WEST provides GTT functionality in another
                         Network Element U S WEST shall provide the NP database
                         in accordance with industry standards which shall
                         supersede the following as needed.

                  17.3.2 Requirements

                         17.3.2.1     U S WEST shall make U S WEST NP database
                                      available for Pac-West switches to query
                                      to obtain the appropriate routing number
                                      on calls to ported numbers or the industry
                                      specified indication that the number is
                                      not ported for non-ported numbers in
                                      NPA-NXXs that are opened to portability.
                                      The specified indication will also be
                                      provided when the NPA-NXX is not open to
                                      portability.

                         17.3.2.2     Query responses shall provide such
                                      additional information (e.g., Service
                                      Provider identification) as may be
                                      specified in the NP implementation in the
                                      relevant regulatory jurisdiction.

                         17.3.2.3     U S WEST shall complete CLASS or LIDB
                                      queries routed to the U S WEST network by
                                      Pac-West switches and return the
                                      appropriate response to the querying
                                      source.

                         17.3.2.4     The NP database shall provide such other
                                      functionality as has been specified in the
                                      regulatory jurisdiction in which
                                      portability has been implemented.

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<PAGE>

                         17.3.2.5     Unavailability of the NP database query
                                      and GTT applications shall not exceed four
                                      (4) minutes per year.

                         17.3.2.6     The U S WEST NP database shall respond to
                                      a round trip query within 500 milliseconds
                                      or as amended by industry standards.

                  17.3.3 Interface Requirements

                         U S WEST shall interconnect the signaling interface
                         between the Pac-West or other local switch and the NP
                         Database using the TCAP protocol as specified in the
                         technical references in this Agreement, together with
                         the signaling network interface as specified in the
                         technical references in this Agreement, and such
                         further requirements (e.g., AIN or IN protocols) as may
                         be specified by regulatory or other bodies responsible
                         for implementation of number portability.

         17.4     Line Information Database (LIDB)

                  This Section 17.4 defines and sets forth additional
                  requirements for the Line Information Database.

                  17.4.1 Definition:

                         The Line Information Database ("LIDB") is a
                         transaction-oriented database accessible through Common
                         Channel Signaling ("CCS") networks. It contains records
                         associated with subscriber Line Numbers and Special
                         Billing Numbers (in accordance with the requirements in
                         the technical reference in Section 17.6.5). LIDB
                         accepts queries from other Network Elements, or
                         Pac-West's network, and provides appropriate responses.
                         The query originator need not be the owner of LIDB
                         data. LIDB que6es include functions, such as screening
                         billed numbers, that provide the ability to accept
                         Collect or Third Number Billing calls and validation of
                         Telephone Line Number based non-proprietary calling
                         cards. The interface for the LIDB functionality is the
                         interface between the U S WEST CCS network and other
                         CCS networks. LIDB also interfaces to administrative
                         systems. The administrative system interface provides
                         work centers with an interface to LIDB for functions
                         such as provisioning, auditing of data, access to LIDB
                         measurements and reports.

                  17.4.2 Technical Requirements

                    17.4.2.1     U S WEST shall enable Pac-West to store in U S
                                 WEST's LIDB any line number or special billing
                                 number. Pac-West will provide U S WEST a non
                                 binding LIDB forecast. Prior to the
                                 availability of permanent NP, U S WEST shall
                                 enable Pac-West to store in U S WESTs LIDB any
                                 subscriber Line Number or Special Billing
                                 Number record for Pac-West resale, unbundled
                                 Network Elements and facility based customers,
                                 in accordance with the technical reference in
                                 Section 17.6.5, whether ported or not, for
                                 which the NPA-NXX or NXX-0/IXX Group is
                                 supported by that LIDB.

                    17.4.2.2     Prior to the availability of permanent NP, U S
                                 WEST shall enable Pac-West to store in U S
                                 WEST's LIDB any subscriber Line Number or
                                 Special Billing

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<PAGE>

                                 Number record for Pac-West resale, unbundled
                                 Network Elements and facility based customers,
                                 in accordance with the technical reference in
                                 Section 17.6.5, whether ported or not, and
                                 NPA-NXX and NXX-0/IXX Group Records, belonging
                                 to an NPA-NXX or NXX-0/1 XX owned by Pac-West.

                   17.4.2.3      Subsequent to the availability of permanent NP,
                                 U S WEST shall enable Pac-West to store in U S
                                 WEST's LIDB any subscriber Line Number or
                                 Special Billing Number record for Pac-West
                                 resale, unbundled Network Elements and facility
                                 based customers, in accordance with the
                                 technical reference in Section 17.6.5, whether
                                 ported or not, regardless of the number's
                                 NPA-NXX or NXX-0/IXX.

                    17.4.2.4     U S WEST shall perform the following LIDB
                                 functions (i.e., processing of the following
                                 query types as defined in the technical
                                 reference in Section 17.6.5) for Pac-West's
                                 subscriber records in LIDB:

                                 17.4.2.4.1 Billed Number Screening (provides
                                 information such as whether the Billed Number
                                 may accept Collect or Third Number Billing
                                 calls);

                                 17.4.2.4.2 Calling Card Validation; and

                                 17.4.2.4.3 Originating Line Number Screening
                                 (OLNS), when available.

                    17.4.2.5     U S WEST shall process Pac-West's subscriber
                                 records in LIDB at least at parity with U S
                                 WEST subscriber records, with respect to other
                                 LIDB functions (as defined in the technical
                                 reference in Section 17.6). U S WEST shall
                                 indicate to Pac-West what additional functions,
                                 if any, are performed by LIDB in its network.
                                 Within ninety (90) days after the Effective
                                 Date of this Agreement, the Parties shall
                                 develop an interim procedure to process
                                 Pac-West subscriber records.

                    17.4.2.6     Within two (2) weeks after a request by
                                 Pac-West, U S WEST shall provide Pac-West with
                                 a list of the subscriber data items which
                                 Pac-West would have to provide in order to
                                 support each required LIDB function. The list
                                 shall indicate which data items are essential
                                 to LIDB function, and which are required only
                                 to support certain services. For each data
                                 item, the list shall show the data formats, the
                                 acceptable values of the data item and the
                                 meaning of those values.

                    17.4.2.7     US WEST shall provide LIDB performance in
                                 accordance with section 17.6.5.

                    17.4-2.8     U S WEST shall provide Pac-West with the
                                 capability to provision (e.g., to add, update,
                                 and delete) NPA-NXX and NXX-0/IXX Group
                                 Records, and Line Number and Special Billing
                                 Number Records, associated with Pac-West
                                 subscribers, directly into US WEST's LIDB
                                 provisioning process. Within ninety (90) days
                                 after the Effective Date of this Agreement, the

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<PAGE>

              Parties shall establish an interim process to meet the
              requirements of this Section.

17.4.2.9      Unless directed otherwise by Pac-West, in the event end user
              subscribers change their local service provider to Pac-West, U S
              WEST shall maintain subscriber data (for line numbers, card
              numbers, and for any other types of data maintained in LIDB) so
              that such subscribers shall not experience any interruption of
              service due to the lack of such maintenance of subscriber data.

17.4.2.10     All additions, updates and deletions of Pac-West data to the LIDB
              shall be made solely at the direction of Pac-West.

17.4.2.11     U S WEST shall provide priority updates to LIDB for Pac-West data
              upon Pac-West's request (e.g., to support fraud protection).

17.4.2.12     When available, U S WEST shall provide Pac-West the capability to
              directly obtain, through an electronic interface, reports of all
              Pac-West data in LIDB. Within ninety (90) days after the Effective
              Date of this Agreement, the Parties shall establish an interim
              process to meet the requirements of this Section.

17.4.2.13     [intentionally left blank for numbering consistency]

17.4.2.14     U S WEST shall perform backup and recovery of all of Pac-West's
              data in LIDB as frequently as U S WEST performs backup and
              recovery for itself and any other Person, including sending to
              LIDB all changes made since the date of the most recent backup
              copy. Backup will be performed weekly. When needed, recovery will
              take place within twenty-four (24) hours.

17.4.2.15     U S WEST shall provide to Pac-West access to LIDB measurements and
              reports at least at parity with the capability U S WEST has for
              its own subscriber records and that U S WEST provides to any
              other party. Such access shall be electronic. Within ninety (90)
              days after the Effective Date of this Agreement, the Parties shall
              establish an interim process to meet the requirements of this
              Section.

17.4.2.16     U S WEST shall provide Pac-West with LIDB reports of data which
              are missing or contain errors, as well as any misroute errors,
              within the same time period as U S WEST provides such reports to
              itself. Within ninety (90) days after the Effective Date of this
              Agreement, the Parties shall establish a process to meet the
              requirements of this Section.

17-4.2-17     U S WEST shall prevent any access to or use of Pac-West data in
              LIDB by U S WEST personnel or by any other party not authorized
              in writing by Pac-West

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<PAGE>

              17.4-2.18    If and when technically feasible, U S WEST shall
                           provide Pac-West performance of the LIDB Data
                           Screening function, which allows a LIDB to completely
                           or partially deny specific query originators access
                           to LIDB data owned by specific data owners (in
                           accordance with the technical reference in Section
                           17.6.5) for subscriber data that is part of an
                           NPA-NXX or NXX0/IXX wholly or partially owned by
                           Pac-West at least at parity with U S WEST subscriber
                           data. U S WEST shall obtain from Pac-West the
                           screening information associated with LIDB Data
                           Screening of Pac-West data in accordance with this
                           requirement.

                           17.4.2.18.1 The Parties agree to investigate
                           technical feasibility of variable LIDB database
                           screening to accomplish 17.4.2.18 above.

           17.4.2.19       U S WEST shall accept queries to LIDB associated with
                           Pac-West subscriber records, and shall return
                           responses in accordance with the requirements of this
                           Section 17.

         17.4.3   Interface Requirements

                  U S WEST shall offer LIDB in accordance with the requirements
                  of this Section 17.4.3.

                  17.4.3.1     The interface to LIDB shall be in accordance with
                               the technical reference in Section 17.6.3.

                  17.4.3.2     The CCS interface to LIDB shall be the standard
                               interface described in Section 17.6.3.

                  17.4.3.3     The LIDB Database interpretation of the ANSI-TCAP
                               messages shall comply with the technical
                               reference in Section 17.6.4. Global Title
                               Translation shall be maintained in the signaling
                               network in order to support signaling network
                               routing to the LIDB.

17.5     Toll Free Number Database

         The Toll Free Number Database is an SCP that provides functionality
         necessary for toll free (e.g., 800 and 888) number services by
         providing routing information and additional vertical features during
         call set-up in response to queries from SSPs. This Section 17.5
         supplements the requirements of Section 17.2 and 17.7. U S WEST shall
         provide the Toll Free Number Database in accordance with the following
         subsections.:

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<PAGE>

         17.5.1 Technical Requirements

              17.5.1.1     U S WEST shall make the U S WEST Toll Free Number
                           Database available, through its STPs, for Pac-West to
                           query from Pac-West's designated switch including U S
                           WEST unbundled Local Switching.

              17.5.1.2     The Toll Free Number Database shall return carrier
                           identification and, where applicable, the queried
                           toll free number, translated numbers and instructions
                           as it would in response to a query from a U S WEST
                           switch.

         17.5.2 Interface Requirements

                  The signaling interface between the Pac-West or other local
                  switch and the Toll - Free Number Database shall use the TCAP
                  protocol as specified in the technical reference in Section
                  17.6.1, together with the signaling network interface as
                  specified in the technical references in Sections 17.6.2 and
                  17.6.6.

17.6     SCPs/Databases shall be at least equal to all of the requirements for
         SCPs/Databases set forth in the following technical references:

          17.6.1  GR-246-CORE, Bell Communications Research Specification of
                  Signaling System Number 7, Issue 1 (Bellcore, December 199X);

          17.6.2  GR-1432-CORE, CCS Network Interface Specification (CCSNIS)
                  Supporting Signaling Connection Control Part (SCCP) and
                  Transaction Capabilities Application Part (TCAP) (Bellcore,
                  March 1994);

          17.6.3  GR-954-CORE, CCS Network Interface Specification (CCSNIS)
                  Supporting Line Information Database (LIDB) Service 6, Issue
                  1, Rev. 1 (Bellcore, October 1995);

          17.6.4  GR-1149-CORE, OSSGR Section 10: System Interfaces, Issue 1
                  (Bellcore, October 1995) (Replaces TR-NWT-001 149);

          17.6.5  GRA 158-CORE, OSSGR Section 22.3: Line Information Database 6,
                  Issue (Bellcore, October 1995); and

          17.6.6  GR-1428-CORE, CCS Network Interface Specification (CCSNIS)
                  Supporting Toll Free Service (Bellcore, May 1995).

17.7      Advanced Intelligent Network ("AIN") Access, Service Creation
          Environment and Service Management System ("SCE/SMS") Advanced
          Intelligent Network Access

          17.7.1  U S WEST shall provide mediated access to all U S WEST service
                  applications, current or future (if technically feasible),
                  resident in U S WEST's SCP through U S WESTs S TPs. Such
                  access may be from Pac-Wests switch or U S WESTs unbundled
                  local switch.

          17.7.2  SCE/SMS AIN Access shall provide Pac-West the ability to
                  create service applications in the U S WEST SCE and deploy
                  those applications via the

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<PAGE>

                  U S WEST SMS to the U S WEST SCP. This interconnection
                  arrangement shall provide Pac-West access to the U S WEST
                  development environment and administrative system in a manner
                  at least at parity with U S WEST's ability to deliver its own
                  AIN-based services. SCE AIN Access is the development of
                  service applications within the U S WEST Service Creation
                  Environment capability. SMS AIN Access is the provisioning of
                  service applications via the U S WEST Service Management
                  System capability. AIN trigger provisioning will be
                  accomplished through the U S WEST local unbundled switching.

          17.7.3  Services Available. U S WEST shall make SCE hardware,
                  software, testing and technical support (e.g., technical
                  contacts, system administrator resources available to
                  Pac-West. Scheduling of SCE resources shall allow Pac-West at
                  least equal priority to U S WEST.

          17.7.4  Multi-user Access. The U S WEST SCE/SMS shall allow for
                  multi-user access with proper source code management and other
                  logical security functions.

          17.7.5  Partitioning. When available, the U S WEST SCP shall partition
                  and protect Pac-West service logic and data from unauthorized
                  SMS capability and SCE capability access, execution or other
                  types of compromise.

          17.7.6  Training and Documentation. U S WEST shall provide training
                  and documentation for Pac-West development staff only in cases
                  in which such training or documentation is not reasonably
                  available from another source. If training or documentation is
                  required in accordance with this Section, it will be provided
                  in a manner at least at parity with that provided by U S WEST
                  to its development staff.

                  Training will be conducted at a mutually agreed upon location.

          17.7.7  Access Environment When Pac-West selects SCE/SMS AIN Access, U
                  S WEST shall provide for a secure, controlled access
                  environment on-site. When available, Pac-West may request
                  mutually agreed upon remote data connections (e.g., dial up,
                  LAN, WAN).

          17.7.8  Data Exchange. When Pac-West selects SMS AIN Access, U S WEST
                  shall allow Pac-West to download data forms and/or tables to
                  the U S WEST SCP, via the U S WEST SMS capability, in the same
                  fashion as U S WEST downloads such forms and/or tables for
                  itself.

          17.7.9  Certification Testing. Certification testing is typically a
                  two step process that includes an off-line unit test followed
                  by an on-line controlled introduction testing into one of each
                  of the U S WEST switch types capable of supporting the
                  service. Services created by Pac-West will require
                  certification testing by U S WEST before the services can be
                  provisioned in the network. The scheduling of U S WEST
                  certification testing resources for new Pac-West services will
                  be jointly coordinated and prioritized between U S WEST and
                  Pac-West. Pac-West testing requirements will be given equal
                  priority with both U S WEST and other provider's requirements.
                  In most circumstances, such testing will be completed within
                  sixty (60) days from the date the application is submitted by
                  Pac-West to U S WEST for certification. In circumstances
                  involving complex applications requiring additional time for
                  testing,

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<PAGE>

                  equipment and facilities provided by Pac-West or third
                  parties, and (c) ensure that all operational interfaces and
                  processes are in place and functioning properly and
                  efficiently for the provisioning and maintenance of Network
                  Elements and Ancillary Functions and so that all appropriate
                  billing data can be provided to Pac-West.

          18.1.2 Requirements

                  Within forty-five (45) days of the Effective Date of this
                  Agreement, Pac-West and U S WEST will agree upon a process to
                  resolve technical issues relating to interconnection of
                  Pac-West's network to U S WEST's network and Network Elements
                  and Ancillary Functions. The agreed upon process shall include
                  procedures for escalating disputes and unresolved issues up
                  through higher levels of each Party's management. If Pac-West
                  and U S WEST do not reach agreement on such a process within
                  the 45-day time period, any issues that have not been resolved
                  by the Parties with respect to such process shall be submitted
                  to the dispute resolution procedures set forth in Part A of
                  this Agreement unless both Parties agree to extend the time to
                  reach agreement on such issues.

               18.1.2.1     U S WEST shall provide Pac-West access for testing
                            at any interface between a U S WEST Network Element
                            or Combinations and Pac-West equipment or
                            facilities. Such test access shall be sufficient to
                            ensure that the applicable requirements can be
                            tested by Pac-West. This access shall be available
                            seven (7) days per week, twenty-four (24) hours per
                            day.

               18.1.2.2     Pac-West may test any interfaces, Network Elements
                            or Ancillary Functions and additional requirements
                            provided by U S WEST to Pac-West pursuant to this
                            Agreement.

               18.1.2.3     U S WEST shall provide engineering data as requested
                            by Pac-West for the loop components as set forth in
                            this Attachment which Pac-West may desire to test.
                            Such data shall include equipment engineering and
                            cable specifications, signaling and transmission
                            path data.

               18.1.2.4     The Parties shall establish a process to provide
                            engineering/office support information on unbundled
                            Network Elements (e.g., central office layout and
                            design records and drawings, system engineering and
                            other applicable documentation) pertaining to a
                            Network Element or Ancillary Function or the
                            underlying equipment that is then providing a
                            Network Element or Ancillary Function to Pac-West.

               18.1.2.5     Upon request from Pac-West, U S WEST shall provide
                            to Pac-West all applicable test results from U S
                            WEST testing activities on a Network Element or
                            Ancillary Function or additional requirement or the
                            underlying equipment providing a Network Element or
                            Ancillary Function or additional requirements.
                            Pac-West may review such test results and may notify
                            U S WEST of any detected deficiencies.

               18-1.2.6     U S WEST shall temporarily provision Pac-West
                            designated Local Switching features for testing.
                            Within sixty (60) days of the Effective Date

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<PAGE>

                           of this Agreement, Pac-West and U S WEST shall
                           mutually agree procedures to be established between
                           U S WEST and Pac-West to expedite such provisioning
                           processes for feature testing.

              18.1.2.7     Upon Pac-West's request, U S WEST shall make
                           available support to meet with Pac-West
                           representatives to provide required support for
                           Cooperative Testing. U S WEST shall define the
                           process to gain access to such technical support

              18.1.2.8     Dedicated Transport and Loop Feeder may experience
                           alarm due to in-progress tests. U S WEST shall notify
                           Pac-West upon such facilities from service.

              18.1.2.9     U S WEST shall exercise its best efforts to notify
                           Pac-West conducting tests or maintenance procedures
                           on Network Elements Ancillary Functions or on the
                           underlying equipment that is then Network Element or
                           Ancillary Function, that will likely cause
                           interruption or degradation of service.

              18.1.2.10    US WEST shall provide a single point of contact to
                           Pac-West available seven (7) days per week,
                           twenty-four (24) hours per day for trouble status,
                           sectionalization, resolution, escalation, and
                           closure. Such staff shall be adequately skilled to
                           allow expeditious problem resolution.

              18.1.2.11    U S WEST shall make available to Pac-West access to
                           105 responders 100-type test lines, or 102-type test
                           lines associated with any circuits under test.

              18.1.2.12    Pac-West and U S WEST shall complete Cooperative
                           accordance with the procedures set forth in
                           Attachment 5.

              18.1.2.13    U S WEST shall participate in Cooperative Testing
                           requested whenever it is deemed necessary by
                           Pac-West to insure performance, reliability and
                           subscriber serviceability.

              18.1.2.14    Pac-West may accept or reject the Network Element
                           ordered by if, upon completion of cooperative
                           acceptance testing, the tested Network Element does
                           not meet the requirements stated herein.

18.2     Performance

         18.2.1   Scope

                  This section addresses performance requirements for Network
                  Elements and Ancillary Functions to provide local service.

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<PAGE>

                  18.2.1.2   U S WEST shall work cooperatively with Pac-West to
                             determine appropriate performance allocations
                             across Network Elements.

         18.2.2  Pac-West may request real-time, remote data access to
                 performance monitoring and alarm data on events affecting (or
                 potentially affecting) Pac-West's traffic. Pac-West shall
                 specify the performance to be monitored and alarm data to be
                 collected. To the extent the above is not available, Pac-West
                 will use the Bona Fide Request process to gain such capability.

        18.2.3   Subject to the provisions of Sections 1.3.1 and 1.3.2 of Part A
                 of this Agreement, U S WEST shall provide performance at least
                 equal to the requirements set forth in the following technical
                 references:

                 18.2.3.1 Bell Communications Research, Inc. Documents

                 18.2.3.1.1 FR-64, LATA Switching Systems Generic Requirements
                            (LSSGR). This document contains 117 Technical
                            References and Generic Requirements. Sections
                            provide the requirements for local switching systems
                            (also referred to as end offices) that serve
                            subscribers' lines. Some modules of the LSSGR are
                            also referenced separately in this document.

                18.2.3.1.2  TR-NWT-000499,  Issue 5, Rev 1, April 1992,
                            Transport Systems Generic Requirements (TSGR):
                            Common Requirements.

                18.2.3.1.3  TR-NWT-000418, Issue 2, December 1992, Generic
                            Reliability Assurance Requirements For Fiber Optic
                            Transport Systems,

                18.2.3.1.4  TR-NWT-000057, Issue 2, January 1993, Functional
                            Criteria for Digital Loop Carriers Systems.

                18.2.3.1.5  TR-NWT-000507, Issue 5, December 1993, LSSGR
                            Transmission, Section 7.

                18.2.3.1.6  GR-303-CORE, Issue 1, September 1995, Integrated
                            Digital Loop Carrier System Generic Requirements,
                            Objectives, and Interface.

                18.2.3.1.7  GR-334-CORE,  Issue 1, June 1994, Switched Access
                            Service:  Transmission  Parameter Limits and
                            Interface Combinations.

                18.2.3.1.8  TR-NWT-000335, Issue 3, May 1993, Voice Grade
                            Special Access Services - Transmission Parameter
                            Limits and Interface Combinations.

                18.2.3.1.9  TR-TSY-000529, Issue 2, July 1987, Public Safety -
                            LSSGR.

                18.2.3.1.10 GR-1 158-CORE, Issue 2, October 1995, OSSGR Section
                            22.3: Line Information Database.

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                18.2.3.1.11 TR-TSY-00051 1, Issue 2, July 1987, Service
                            Standards, a Module (Section 11) of LATA Switching
                            Systems Generic Requirements (LSSGR, FR-NWT-000064).

                18.2.3.1.12 TR-NWT-000393, January 1991, Generic Requirements
                            for ISDN Basic Access Digital Subscriber Lines.

                18.2.3.1.13 TR-NWT-000909, December 1991, Generic Requirements
                            and Objectives for Fiber In The Loop Systems.

                18.2.3.1.14 TR-NWT-000505, Issue 3, May 1991, LSSGR Section 5,
                            Call Processing.

                18.2.3.1.15 FR-NWT-000271, 1993, Operator Services Systems
                            Generic Requirements (OSSGR).

                18-2.3.1.16 TR-NWT-001156, Issue 2, July 1993, OSSGR Operator
                            Services Systems Generic Requirements, Section 21,
                            Operator Subsystem.

                18.2.3.1.17 SR-TSY-001 171, Issue 1, January 1989, Methods and
                            Procedures for System Reliability Analysis.

                18.2.3.1.18 Bellcore Telecommunications Transmission
                            Engineering, 3rd Ed, 1990.

     18.2.3.2   ANSI Standards

                18.2.3.2.1  ANSI T1.512-1994, Network Performance -
                            Point-to-Point Voice-Grade Special Access Network
                            Voiceband Data Transmission Objectives.

                18.2.3.2.2  ANSI T1.506-1990, Network Performance - Transmission
                            Specifications for Switched Exchange Access Network.

                18.2.3.2.4  ANSI T1.508-1992, Telecommunications - Network
                            Performance - Loss Plan for Evolving Digital
                            Networks. Also supplement T1.508a-1993.

                18.2.3.2.5  ANSI T1.101-1994, Digital Synchronization Network
                            Plan.

     18.2.3.3   TIA/EIA Standards

                18.2.3.3.1  Requirements not specifically addressed here shall
                            be found in the documents listed in Electronic
                            Industries Association/Telecommunications Industries
                            Association Standards and Engineering Publications.

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                18.2.3.3.2  TIA/EIA TSB-37A, Telephone Network Transmission
                            Model for Evaluating Modem Performance.

                18.2.3.3.3  TIA/EIA TSB-38, Test Procedure for Evaluation of
                            2-wire 4 kHz Voiceband Duplex Modems.

     18.2.3.4   IEEE Standards

                18.2.3.4.1  IEEE Standard 743-1984, IEEE Standard Methods and
                            Equipment for Measuring Transmission Characteristics
                            of Analog Voice Frequency Circuits.

                18.2.3.4.2  ANSI/IEEE Standard 820-1984, Telephone Loop
                            Performance Characteristics.

18.2.4 Services and Capabilities

     18.2.4.1   All Network Elements shall provide performance sufficient, in
                combination with other Network Elements, to provide the
                following applications in accordance with the requirements of
                this Agreement:

                18.2.4.1.1 all types of voice services;

                18.2.4.1.2 all types of voice-band data modem connections up to
                           and including 28.8 Kbps V-34;

                18.2.4.1.3 all types of facsimile transmissions up to and
                           including 14.4 Kbps group 3;

                18.2.4.1.4 all CLASS/LASS features; and

                18.2.4.1.5 all Operator Systems.

     18.2.4.2   The following capabilities shall be provided as applicable:

                18.2.4.2.1 ISDN BRI

                18.2.4.2.2 ISDN PRI

                18.2.4.2.3 Switched Digital Data

                18.2.4.2.4 Non-Switched Digital Data

                18.2.4.2.5 Any types of video applications a subscriber may
                           order

                18.2.4.2.6 Any Coin Services a subscriber may order

                18.2.4.2.7 Frame Relay and ATM

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                18.2.4.2.8 Private Line Services

18.2.5 Specific Performance Requirements for Network Elements and Ancillary
       Functions

     18.2.5.1   The following Sections set forth performance parameters for
                Network Elements and Ancillary Functions. U S WEST shall provide
                performance equal to or better than all of the applicable
                requirements set forth in this Section. Unless otherwise noted,
                requirements and objectives are given in terms of specific
                limits.

     18.2.5.2   Within ninety (90) days of the Effective Date of this Agreement,
                U S WEST will analyze the following performance criteria with
                respect to the standards identified herein and document the U S
                WEST deviations consistent with the processes outlined in
                Sections 1.3.1 and 1.3.2 in Part A of this Agreement.

     18.2.5.3   Transmission path impairments may be classified as either analog
                or digital and will depend on the nature of the signal
                transmitted across the Network Element. Analog impairments are
                introduced on any analog portion of the Loop, typically between
                the NID portion of Loop Distribution and the analog to digital
                (AID) conversion, and are usually correlated with the length of
                the physical plant. Digital impairments are introduced by A/D
                conversion and by interfaces between digital Network Elements.
                In addition, noise can be introduced by either analog
                transmission or the A/D conversion.

     18.2.5.4   Loop Combination Architecture Constraints

                18.2.5.4.1 The following constraints will limit not only the
                variety of Loop Combination architectures that may be
                considered, but also the architectures U S WEST may consider to
                deliver any Ancillary Function or Network Element provided by
                USWC to Pac-West unless otherwise specified by Pac-West. These
                constraints apply to the entire path between the NID portion of
                Loop Distribution and the U S WEST switch. Any exceptions to
                these restrictions shall be specifically requested or approved
                by Pac-West in writing.

                18.2.5.4.1.1       No more than one (1) pair of A-D conversion.
                18.2.5.4.1.2       No more than one (1), 2-to-4-wire hybrid.
                18.2.5.4.1.3       No voice compression.
                18.2.5.4.1.4       No echo canceled or suppressers.
                18.2.5.4.1.5       One (1) digital loss pad per PBX.
                18.2.5.4.1.6       No digital gain.

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                18.2.5.4.1.6      No additional equipment that might
                                  significantly increase intermodulation
                                  distortion.

     18.2.5.5 Transmission Impairments

         18.2.5.5.1 Analog Impairments

             18.2.5.5.1.1 Analog impairments are those introduced on portions of
             the end-to-end circuit on which communications signals are
             transmitted in analog format. These portions of the transmission
             path would typically be between NID and an A/D conversion, most
             commonly on the metallic loop. The performance on the analog
             portion of a circuit is typically inversely proportional to the
             length of that circuit.

             18.2.5.5.1.2 Loss

                  18.2.5.5.1.2.1 Electrical loss is measured using a 1004 Hz
                  test tone at zero (0.0) db at one milliwatt into a 900 ohm
                  termination.

                  18.2.5.5.1.2.2 [Intentionally left blank for numbering
                  consistency)

             18.2.5.5.1.3 Idle Channel Circuit Noise

                  18.2.5.5.1.3.1 Idle channel circuit noise (C-message) is added
                  by analog facilities, by the A/D conversion of signals, by
                  digital processing equipment (e.g., echo cancelers, digital
                  loss pads), robbed bit signaling, and errors on digital
                  facilities.

              18.2.5.5.1.4 Talker Echo

                  18.2.5.5.1.4.1 The primary source of echo is improper
                  impedance matching at the 2-to-4 wire hybrid in the U S WEST
                  network. The impact on subscriber perception is a function of
                  both echo return loss and delay.

              18.2.5.5.1.5 Listener Echo

                  18.2.5.5.1.5.1 Listener echo is a double reflection of a
                  transmitted signal at two (2) different impedance mismatches
                  in the end-to-end connection. While in extreme cases it can
                  degrade voice transmission performance, listener echo is
                  primarily an issue for voiceband data.

              18.2.5.5.1.6 Propagation and Processing Delay

                  18.2.5.5.1.6.1 Propagation delay is the delay involved in
                  transmitting information from one location to another. It is
                  caused by processing delays of equipment in the network and
                  delays associated with traveling across transmission
                  facilities.

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         18.2.5.5.1.6.2 U S WEST shall cooperate with Pac-West to limit total
         service propagation and processing delay to levels at parity with those
         within the U S WEST local network.

     18.2.5.5.1.7     Signal-to-Noise Ratio

         18.2.5.5.1.7.1 The Signal-to-Noise ratio (S/N) is a critical parameter
         in determining voiceband data performance. It is typically measured
         with a 1004 Hz tone.

     18.2.5.5.1.8     C-Notched Noise

     18.2.5.5.1.9     Attenuation Distortion

         18.2.5.5.1.9.1 Attenuation distortion, also known as frequency
         distortion or gain slope, measures the variations in loss at different
         frequencies across the voice frequency spectrum (200 Hz - 3400 Hz). It
         is measured by subtracting the loss at 1004 Hz from the loss at the
         frequency of interest.

     18.2.5.5.1.10    Envelope Delay Distortion

         18.2.5.5.1.10.1 Envelope Delay Distortion ("EDD") measures the
         difference in transit time of signals at different frequencies. EDD is
         measured relative to the transit time of a 1704 Hz tone, and is given
         in microseconds. EDD is used as an approximation of the group delay of
         the channel.

     18.2.5.5.1.11     Phase Jitter

         18.2.5.5.1.11.1 Phase jitter measures the unwanted angular modulation
         of a signal. It is caused by noise or the actual modulation of the
         signal by another unwanted signal. It displaces the zero crossings of a
         signal. It is measured in terms of peak-to-peak deviations of a 1004 Hz
         tone from its nominal zero crossings, and in a particular frequency
         band (200-300 HZ and either 4-300 Hz or 2-300 Hz). Phase jitter impacts
         voiceband data performance and can make modems more susceptible to
         other impairments, including noise.

     18.2.5.5.1.12     Amplitude Jitter

         18.2.5.5.1.12.1 Amplitude jitter is any deviation of the peak value of
         a 1004 Hz signal from its nominal value. Excessive amounts can impair
         voiceband data performance. It is primarily caused by noise but can
         also be caused by phase jitter, gain hits, or single frequency
         interference.

     18.2.5.5.1.13     Intermodulation Distortion

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<PAGE>

         18.2.5.5.1.13.1 Intermodulation distortion ("IMD") measures non-linear
         distortions of a signal. It compares the power of harmonic tones to the
         power of the transmitted tones. It is measured for both the second and
         third harmonics of the transmitted tones. IMID is caused by compression
         or clipping and can impair voiceband data performance.

     18.2.5.5.1.14     Impulse Noise

         18.2.5.5.1.14.1 Impulse noise is a sudden and large increase in noise
         on a channel for a short duration of time. Impulse noise is measured as
         a count of the number of times a noise threshold is exceeded during a
         given time period (typically 5 or 15 minutes). It is caused by
         protection switching, maintenance activities, electromechanical
         switching systems, digital transmission errors, and line coding
         mismatches. Impulse noise sounds like clicking noises or static on
         voice connections. Impulse noise impairs voiceband data performance.

     18.2.5.5.1.15     Phase Hits

         18.2.5.5.1.15.1 Phase hits are a sudden change in the phase of a signal
         lasting at least four (4) milliseconds. Phase hits are measured using a
         threshold that indicates how much the phase of the signal has changed
         with respect to its nominal phase. Phase hits are caused by protection
         switching and slips or other synchronization errors. Phase hits can
         impair voiceband data performance.

     18.2.5.5.1.16     Gain Hits

         18.2.5.5.1.16.1 Gain hits are sudden changes in the level of a signal
         that last at least four (4) milliseconds. Gain hits are measured
         against a threshold of typically 2-5 dB relative to the signal's
         nominal level. Gain hits are usually caused by protection switches and
         can impair voiceband data performance.

     18.2.5.5.1.17     Dropouts

         18.2.5.5.1.17.1 Dropouts are drops in the level of a signal of 12 dB or
         more for at least four (4) milliseconds. They are caused by protection
         switching events, radio fading, and conditions causing digital carrier
         systems to lose frame. Dropouts are critical for voiceband data
         performance but, if severe enough, will also affect voice quality.

     18.2.5.5.1.18     Frequency Shift

         18.2.5.5.1.18.1  Frequency shift measures any frequency changes that
         occur when a signal is transmitted across a channel. It is typically
         measured using a 1004 Hz tone. Frequency shift has very little impact
         on

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         voice or voiceband data performance; however, round-trip frequency
         shifts can affect the ability of echo cancelers to remain converged.

     18.2.5.5.1.19     Crosstalk

         18.2.5.5.1.19.1 Crosstalk is the presence of signals from other
         telephone connections on a circuit. Crosstalk can be either
         intelligible, when speech from other connections can be heard and
         understood, or unintelligible. Crosstalk is caused by inter-channel
         interference on the transmission system. Crosstalk is difficult to
         measure: it requires correlating signals on different circuits or using
         human listeners to identify its presence. Trouble reports may be used
         to estimate the probability of crosstalk.

     18.2.5.5.1.20     Clipping

         18.2.5.5.1.20.1 Clipping occurs when part of a transmitted signal is
         dropped and does not reach the receiving portion on a connection. It
         can be caused by Digital Speech Interpolation ("DS1") equipment used in
         Digital Circuit Multiplication Systems ("DCMS") which increase the
         amount of traffic that transmission facilities carry, and by echo
         cancelers or echo suppressers.

     18.2.5.5.1.21     Digital Impairments

         18.2.5.5.1.21.1 Digital impairments occur in the signal wherever it is
         transmitted in digital format. These errors are usually introduced upon
         conversion of the signal from analog to digital, as well as at
         interfaces between digital components. While many digital impairments
         have little impact on subjective voice quality, they can impact data
         performance.

     18-2.5.5.1.22     Signal Correlated Distortion

         18.2.5.5.1.22.1 Signal correlated distortion ("SCD") is unwanted noise
         or distortion introduced into a signal through the conversion of a
         signal from analog to digital format or through digital processing that
         changes the transmitted signal. SCD affects performance when a signal
         is being transmitted. The primary sources of SCD are signal encoders,
         echo cancelers, digital loss pads, and robbed bit signaling. SCD
         affects both voice and data performance.

         18.2.5.5.1.22.2 [Left Blank Intentionally]

     18.2.5.5.1.23     Slips

         18.2.5.5.1.23.1 Slips occur when a frame of digital data is either
         deleted or repeated because of differences in the clocks used to
         synchronize digital facilities. Slips sound like clicks or pops on
         voice calls and have major impact on data performance.

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     18.2.5.5.1.24     Digital Timing Jitter and Wander

         18.2.5.5.1.24.1 Digital timing jitter is the unwanted phase modulation
         of digital signals at rates above 10 Hz. Wander is the unwanted phase
         modulation, of digital signals at rates below 10 Hz. Digital timing
         jitter is caused by imperfections in the timing recovery process of
         regenerators and the stuffing synchronization process used by
         multiplexer/demultiplexers. Wander is caused by slowly varying changes
         in digital signal phase due to clock frequency offset and drift,
         changes in propagation delay of terrestrial facilities due to
         temperature changes and changes in the distance of satellites from the
         earth. These events have a major impact on data performance.

     18.2.5.5.1.25     DS-1 Errored Seconds

         18.2.5.5.1.25.1 An Errored Second ("ES") on a DS-1 facility is any
         second during which at least 1 bit is in error. The impact of an ES on
         performance depends on the number of errors that occur during a second.
         Typically, voice performance is not significantly impacted by ES but it
         can cause errors in data transmissions.

     18.2.5.5.1.26     DS-1 Severely Errored Seconds

         18.2.5.5.1.26.1 A severely Errored Second ("SES") is any second during
         which a DS-1 has an error rate exceeding 0.001. An SES can be caused by
         a loss of framing, a slip, or a protection switch. SESs have impacts on
         both voice and data performance. For voice, a SES will sound like a
         burst of noise or static. SESs that occur during a data transmission
         cause a significant burst of errors and can cause modems to retrain.

    18.2.5.5.1.27     Short Failure Events

         18.2.5.5.1.27.1 A Short Failure Event ("SFE") is a Loss of Frame
         ("LOF") event of less than two (2) minutes' duration. An LOF event is
         declared when, on detection of a Loss of Signal ("LOS") or Out-of-Frame
         ("OOF"), a rise-slope-type integration process starts that declares a
         LOF after 2.5 (plus or minus) 0.5 sec. of continuous LOS or OOF. If the
         LOS or OOF is intermittent the integration process shall decay at a
         slope of 1/5 the rise slope during the period when the signal is
         normal. Thus, if the ratio of a LOS or OOF to a normal signal is
         greater than 1/2, a LOF will be declared. A LOS condition shall be
         declared when the Network Channel Terminating Equipment has determined
         that 175 (plus or minus) 75 successive pulse positions with no pulses
         of either positive or negative polarity have occurred. An OOF condition
         shall be declared when either network equipment or digital terminal
         equipment detects errors in the framing pattern.

    18.2.5.6      Service Availability and Reliability

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        Availability refers to the time period during which the service is up
        and usable for its intended purpose. Reliability refers to the
        probability that a task, once begun, will be successfully completed.

    18.2.5.6.1 Blocked Calls

        18.2.5.6.1.1 Blocking is the fraction of call origination attempts
        denied service during a stated measurement period. Blocking occurs
        because of competition for limited resources within the network.

    18.2.5.6.2 Downtime

        Downtime is the period of time a system is in a failed state.

    18.2.5.6.3 Dial Tone Delay

        18.2.5.6.3.1 Dial-Tone Delay is the time period between a subscriber
        offshoot and the receipt of dial tone from an originating end office.
        Dial-Tone Delay has a significant effect on subscriber opinion of
        service quality.

    18.2.5.6.4 Dial Tone Removal

        18.2.5.6.4.1 Dial tone removal is the time between recognition of the
        first address digit to the removal of dial tone on the line.

    18.2.5.6.5 Post Dial Delay

        18.2.5.6.5.1 Post Dial Delay ("PDD") is the amount of time a caller must
        wait after entering or dialing the last digit of a Destination Telephone
        Number ("DTN") before hearing a valid audible network response. The PDD
        for an end user is measured from the time the caller has pressed or
        dialed the last digit of a DTN until receipt of an audible network
        response.

        18.2.5.6.5.2 The requirements given reflect an end-to-end CCS7 protocol
        for Pac-West end users. Where a mixture of CCS7 and inband (MF)
        signaling protocols are employed, an increase in the PDD can be
        expected.

            18.2.5.6.5.2.1 PDD I - A - Intra LSO

                  18.2.5.6.5.2.1.1 Intra-LSO calls do not employ external
                  signaling protocols. The PDD for intra-LSO calls flows are
                  dependent upon the processor cycle time and traffic load
                  conditions. This PDD is assumed to be between subscribers on
                  the same LSO, between the Remote Switch Modules ("RSM") on the
                  same host, or between an RSM and host subscribers.

            18.2.5.6.5.2.2 PDD1 - B - LSO to Another Local LSO

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            18.2.5.6.5.2.3 PDD1 - C - Pac-West LSO to Other LSO

                  18.2.5.6.5.2.3.1 Calls from an Pac-West LSO to other LSOs are
                  dependent upon the interface agreements between Pac-West and
                  the LSO service provider and may employ CCS7, inband (MF) or a
                  combination of both protocols.

            18.2.5.6.5.2.3.2 [Intentionally left blank for numbering
            consistency]

                  18.2.5.6.5.2.3.2.1    Network Inter-Connect, CCS7 between
                  Pac-West and the LEC.

                  18.2.5.6.5.2.3.2.2 Inband Multifrequency ("MF") signaling
                  protocols without a U S WEST egress tandem in the connection.

                 18.2.5.6.5.2.3.2.3 Inband MF signaling protocols with a U S
                 WEST egress tandem in the connection.

                 18.2.5.6.5.2.3.2.3.1 Calls from an Pac-West LSO to other LSOs
                 outside the local service area are assumed to have multiple
                 STPs for 1+ traffic in the access and PSTN portion of the
                 connection. The egress from the PSTN for 1+ traffic is again
                 dependent upon the interface Agreements in that service area
                 and may consist of CCS7 or inband MF protocols.

            18.2.5.6.5.2.4 Impact of Number Portability (NP)

                 18.2.5.6.5.2.5 Custom Local Area Subscriber Services (CLASS)

           18.2.5.6.5.2.6 Partial Dial Timing

                 18.2.5.6.5.2.6.1 The interval between each information digit
                 from a subscriber's line, until the LSO or switching system has
                 determined that the digit string is incomplete.

18.2.5.7     Local Switching

18.2.5.8     Operator Systems

Operator System connections shall comply with the requirements for the Loop
Combination, Local Switching, Operator Service, and Directory Assistance Service
requirements.

18.2.5.9     Common Transport

Specific requirements for this Network Element or Ancillary Function are in the
Common Transport Section of this Attachment. In all cases the performance of
this Network Element shall meet the general requirements stated in "General
Performance Requirements." Allocation of impairments shall be negotiated

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             between Pac-West and U S WEST consistent with sound engineering
             principles.

             18.2.5.10    Dedicated Transport

             Specific requirements for this Network Element are in the Dedicated
             Transport Section of this Attachment. In all cases the performance
             of this Network Element shall meet the general requirements stated
             in "General Performance Requirements." Allocation of impairments
             shall be negotiated between Pac-West and U S WEST consistent with
             sound engineering principles.

             18.2.5.11    Signaling Transfer Points

             Specific requirements for this Network Element are in the Signaling
             Transfer Points Section of this Attachment. In all cases the
             performance of this Network Element shall meet the general
             requirements stated in "General Performance Requirements."
             Allocation of impairments shall be negotiated between Pac-West and
             U S WEST.

             18.2.5.12    Signaling Link Transport

             Specific requirements for this Network Element are in the Signaling
             Link Transport Section of this Attachment. In all cases the
             performance of this Network Element shall meet the general
             requirements stated in "General Performance Requirements."
             Allocation of impairments shall be negotiated between Pac-West and
             U S WEST consistent with sound engineering principles.

             18.2.5.13    SCPs/Databases

             The performance requirements for Databases (NP, LIDB, E911, etc.)
             vary depending on the Database and the applications it supports.
             Database-specific performance requirements are included in the
             Sections of this Attachment addressing individual Network Elements
             and in applicable Bellcore documents. In all cases, the query
             response time, availability, accuracy, updating capabilities, and
             other performance parameters shall at least be at parity with those
             services as provided by U S WEST to itself.

             18.2.5.14    Tandem Switching

             Specific requirements for this Network Element are in the Tandem
             Switching Section of this Attachment. In all cases the performance
             of this Network Element shall meet the general requirements stated
             in "General Performance Requirements." Allocation of impairments
             shall be negotiated between Pac-West and U S WEST consistent with
             sound engineering principles.

18.2.6 Test and Verification

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                    18.2.6.1       U S WEST shall provide unbundled Network
                                   Elements to Pac-West in such a way as to not
                                   unreasonably interfere with Pac-West's
                                   ability to confirm acceptable performance of
                                   the Network Elements provided by U S WEST to
                                   Pac-West through the use of Pac-West test
                                   equipment located in its collocated space.

                    18.2.6.2       At Pac-West's request through the Bona Fide
                                   Request process, if not generally available,
                                   U S WEST will provide access to the Network
                                   Element sufficient for Pac-West to test the
                                   performance of that Network Element to
                                   Pac-West's satisfaction.

                    18.2.6.3       At Pac-West's request, U S WEST will perform
                                   tests to confirm acceptable performance and
                                   provide Pac-West with documentation of test
                                   procedures and results in conformance with U
                                   S WEST's internal practices. Additional test
                                   procedures may be requested by Pac-West
                                   through the Bona Fide Request process if not
                                   generally available.

         18.3     Protection, Restoration, and Disaster Recovery

                  18.3.1   Scope:

                           This Section refers specifically to requirements on
                           the use of redundant network equipment and facilities
                           for protection, restoration, and disaster recovery.

         18.4     Synchronization

                  18.4.1   Definition:

                           Synchronization is the function which keeps all
                           digital equipment in a communications network
                           operating at the same average frequency. With respect
                           to digital transmission, information is coded into
                           discrete pulses. When these pulses are transmitted
                           through a digital communications network, all
                           synchronous Network Elements are traceable to a
                           stable and accurate timing source. Network
                           synchronization is accomplished by timing all
                           synchronous Network Elements in the network to a
                           stratum 1 traceable source so that transmission from
                           these network points have the same average line rate.

                  18.4.2   Technical Requirements

                           The following requirements are applicable to the case
                           where U S WEST provides synchronization to equipment
                           that Pac-West owns and operates within a U S WEST
                           location. In addition, these requirements apply to
                           synchronous equipment that is owned by U S WEST and
                           is used to provide a Network Element to Pac-West.

                           18.4.2.1 The synchronization of clocks within digital
                                    networks is divided into two parts:
                                    intra-building and inter-building. Within a
                                    building, a single clock is designated as
                                    the Building Integrated Timing Supply
                                    ("SITS"), which provides all of the DS-1 and
                                    DS-0 synchronization references required by

                                       64
<PAGE>

                  other clocks in such building. This is referred to as
                  intra-building synchronization. The BITS receives
                  synchronization references from remotely located BITS such as
                  a primary reference source. Synchronization of BITS between
                  buildings is referred to as inter-building synchronization.

         18.4.2.2 To implement a network synchronization plan, clocks within
                  digital networks are divided into four stratum levels. All
                  clocks in strata 2, 3, and 4 are synchronized to a stratum 1
                  clock, that is, they are traceable to a stratum 1 clock. A
                  traceable reference is a reference that can be traced back
                  through some number of clocks to a stratum 1 source. Clocks in
                  different strata are distinguished by their free running
                  accuracy or by their stability during trouble conditions such
                  as the loss of all synchronization references.

                  18.4.2.2.1 Intra-Building

                  Within a building, there may be different kinds of equipment
                  that require synchronization at the DS-1 and DS-0 rates.
                  Synchronization at the DS-1 rate is accomplished by the
                  frequency synchronizing presence of buffer stores at various
                  DS-1 transmission interfaces. Synchronization at the DS- rate
                  is accomplished by using a composite clock signal that phase
                  synchronizes the clocks. Equipment requiring DS-0
                  synchronization frequently does not have adequate buffer
                  storage to accommodate the phase variations among different
                  equipment. Control of phase variations to an acceptable level
                  is accomplished by externally timing all interconnecting DS-0
                  circuits to a single clock source and by limiting the
                  interconnection of DS-0 equipment to less than 1,500 cable
                  feet. Therefore, a BITS shall provide DS-1 and composite clock
                  signals when the appropriate composite signal is a 64-kHz
                  5/8th duty cycle, return to zero with a bipolar violation
                  every eighth pulse (B8RZ).

                  18.4.2.2.2 Inter-Building

                  U S WEST shall provide inter-building synchronization at the
                  DS-1 rate, and the BITS shall accept the primary and/or
                  secondary synchronization links from BITS in other buildings
                  where necessary. From hierarchical considerations, the BITS
                  shall be the highest stratum clock within the building and U S
                  WEST shall provide operations capabilities. When available,
                  such capability includes, but is not limited to,
                  synchronization reference provisioning; synchronization
                  reference status inquiries; timing mode status inquiries; and
                  alarm conditions.

   18.4.3 Synchronization Distribution Requirements

       18-4.3.1   Central office BITS shall contain redundant clocks meeting or
                  exceeding the requirements for a stratum 3 clock as specified
                  in ANSI T1.101-1994 and ANSI TI.105.09 and Bellcore
                  GR-NWT-001244 Clocks for the Synchronized Network: Common
                  Genetic Criteria.

                                       65
<PAGE>

     18.4-3.2      Central office BITS shall be powered by primary and backup
                   power sources.

     18.4.3.3      If both reference inputs to the BITS are interrupted or in a
                   degraded mode (meaning off frequency greater than twice the
                   minimum accuracy of the BITS, loss of frame, excessive bit
                   errors, or in Alarm Indication Signal), then the stratum
                   clock in the BITS shall provide the necessary bridge in
                   timing to allow the network to operate without a frame
                   repetition or deletion (slip free) with better performance
                   than specified in these technical references specified in
                   18.4.3.1.

     18.4.3.4      DS-1 s multiplexed into a SONET synchronous payload envelope
                   within an STS-n (where "n" is defined in ANSI T1.105-1995)
                   signal shall not be used as reference facilities for network
                   synchronization.

     18.4.3.5      The total number of Network Elements cascaded from the
                   stratum 1 source shall be minimized.

     18.4.3.6      A Network Element shall receive the synchronization reference
                   signal only from another Network Element that contains a
                   clock of equivalent or superior quality (stratum level).

     18.4.3.7      U S WEST shall select for synchronization those facilities
                   shown to have the greatest degree of availability (absence of
                   outages).

     18.4.3.8      Where possible, all primary and secondary synchronization
                   facilities shall be physically diverse (this means the
                   maximum feasible physical separation of synchronization
                   equipment and cabling).

     18.4.3.9      No timing loops shall be formed in any combination of primary
                   and secondary facilities.

     18.4.3.10     U S WEST shall continuously monitor the BITS for
                   synchronization related failures.

     18.4.3.11     U S WEST shall continuously monitor all equipment
                   transporting synchronization facilities for synchronization
                   related failures.

     18.4.3.12     For non-SONET equipment, U S WEST shall provide
                   synchronization facilities which, at a minimum, comply with
                   the standards set forth in ANSI T1.101-1994.

     18.4.3.13     For SONET equipment U S WEST shall provide synchronization
                   facilities that have time deviation (TDEV) for integration
                   times greater than 0.05 seconds and less than or equal to ten
                   (10) seconds, that is less than or equal to 100 nanoseconds.
                   TDEV, in nanoseconds, for integration times greater than ten
                   (10) seconds and less than 1000 seconds, shall be less than
                   31.623 times the square-root of the integration time.

                                       66
<PAGE>

18.5     SS7 Network Interconnection

         18.5.1   Definition:

                  SS7 Network Interconnection is the interconnection of Pac-West
                  local Signaling Transfer Point (STPs) with U S WEST STPs. This
                  interconnection provides connectivity that enables the
                  exchange of SS7 messages among U S WEST switching systems and
                  databases, Pac-West local or tandem switching systems, and
                  other third-party switching systems directly connected to the
                  U S WEST SS7 network.

         18.5.2  Technical Requirements

              18.5.2.1     SS7 Network Interconnection shall provide signaling
                           connectivity to all components of the U S WEST SS7
                           network through U S WEST STPs. These include:

                           18.5.2.1.1 US WEST local or tandem switching systems;

                           18.5.2.1.2 U S WEST databases; and

                           18-5.2.1.3 other third-party local or tandem
                           switching systems.

              18.5.2.2     The connectivity provided by SS7 Network
                           Interconnection shall support the functions of U S
                           WEST switching systems and databases and Pac-West or
                           other third-party switching systems with A-link
                           access to the U S WEST SS7 network.

              18.5.2.3     SS7 Network Interconnection shall provide transport
                           for certain types of Transaction Capabilities
                           Application Part ("TCAP") messages. If traffic is
                           routed based on dialed or translated digits between
                           an Pac-West local switching system and a U S WEST or
                           other third-party local switching system, either
                           directly or via a U S WEST tandem switching system,
                           then it is a requirement that the U S WEST SS7
                           network convey via SS7 Network Interconnection the
                           TCAP messages necessary to provide Call Management
                           services (Automatic Callback, Automatic Recall, and
                           Screening List Editing) between the Pac-West local
                           STPs and the U S WEST or other third-party STPs.

              18.5.2.4     When the capability to route messages based on
                           Intermediate Signaling Network Identifier ("ISNI") is
                           generally available on U S WEST STPs, the U S WEST
                           SS7 Network shall also convey TCAP messages using SS7
                           Network Interconnection in similar circumstances
                           where the U S WEST switch routes traffic based on a
                           Carrier Identification Code ("CIC").

              18.5.2.5     SS7 Network Interconnection shall provide all
                           functions of the MTP as specified in ANSI T1. 111.
                           This includes:

                           18.5.2.5.1 Signaling Data Link functions, as
                           specified in ANSI T1.111.2;

                                       67
<PAGE>

                         18.5.2.5.2 Signaling Link functions, as specified in
                         ANSI T1.111.3; and

                         18.5.2.5.3 Signaling Network Management functions, as
                         specified in ANSI T1. 111.4.

            18.5.2.6     SS7 Network  Interconnection  shall  provide all
                         functions of the SCCP  necessary for Class 0 (basic
                         connectionless) service, as specified in ANSI T1. 112.

            18.5.2.7     Where the destination signaling point is a U S WEST
                         switching system or database, or is another third-party
                         local or tandem switching system directly connected to
                         the U S WEST STPs (SS7 network), SS7 Network
                         Interconnection shall include final GTT of messages to
                         the destination and SCCP Subsystem Management of the
                         destination.

            18.5.2.8     Where the destination signaling point is an Pac-West
                         local or tandem switching system, SS7 Network
                         Interconnection shall include intermediate GTT of
                         messages to a gateway pair of Pac-West local STPs, and
                         shall not include SCCP Subsystem Management of the
                         destination.

            18.5.2.9     SS7 Network Interconnection shall provide all functions
                         of the Integrated Services Digital Network User Part
                         (ISDNUP), as specified in ANSI T1. 113.

            18.5.2.10    SS7 Network Interconnection shall provide all functions
                         of the TCAP, as specified in ANSI T1. 114.

            18.5.2.11    If and when inter-network MTP Routing Verification Test
                         (MRVT) and SCCP Routing Verification Test (SRVT) become
                         approved ANSI standards and available capabilities of
                         both U S WEST and Pac-West STPs, SS7 Network
                         Interconnection shall provide these functions of the
                         OMAP.

                         18.5.2.11.1 The Parties shall develop a mutually agreed
                         upon interim process for MRVT and SRVT within ninety
                         (90) days of the Effective Date of this Agreement.
                         Either Party shall be allowed to shut off MRVT/SRVT for
                         preservation of network integrity.

           18.5.2.12     SS7 Network Interconnection shall be equal to or better
                         than the following performance requirements:

                         18.5.2.12.1 MTP Performance, as specified in ANSI T1.
                         111.6;

                         18.5.2.12.2 SCCP Performance, as specified in ANSI T1.
                         112.5; and

                         18.5.2.12.3 ISDNUP Performance, as specified in ANSI
                         T1. 113.5.

                                       68
<PAGE>

      18.5.3 Interface Requirements

           18.5.3.1     U S WEST shall offer the following SS7 Network
                        Interconnection options to connect Pac-West or
                        Pac-West-designated STPs to the U S WEST STPs (SS7
                        network):

                        18.5.3.1.1 D-link interface from Pac-West STPs.

           18.5.3.2     Each interface shall be provided by one or more sets
                        (layers) of signaling links, as follows:

                        18.5.3.2.1 A D-link layer shall consist of four links.

           18-5.3.3     The Signaling Point of Interconnection ("SPOI") for each
                        link shall be located at a cross-connect element, (e.g.,
                        DSX-1) in the central office where the U S WEST STPs are
                        located. There shall be a DS-1 or higher rate transport
                        interface at each of the SPOls. Each signaling link
                        shall appear as a DS-0 channel within the DS-1 or higher
                        rate interface.

                        U S WEST shall offer higher rate DS-1 signaling links
                        for interconnecting Pac-West local switching systems or
                        STPs with U S WEST STPs as soon as these become approved
                        ANSI standards and available capabilities of U S WEST
                        STPs.

                        18.5.3.3.1 In each LATA, there will be two (2) SPOls.
                        The requirement for two SPOIs is driven by the critical
                        importance attached by the Parties to signaling link
                        diversity.

                        18.5.3.3.2 Each Party will designate one (1) of the two
                        (2) SPOIs in a reasonable and efficient location in the
                        LATA. A SPOI can be any existing cross connect point in
                        the LATA.

                        18.5.3.3.3 Each signaling link requires a port on each
                        Party's STP.

           18.5.3.4     Where available, the U S WEST central office shall
                        provide intraoffice diversity between the SPOIs and the
                        U S WEST STPs, so that no single failure of intraoffice
                        facilities or equipment shall cause the failure of both
                        D-links in a layer connecting to U S WEST's STPs.

           18.5.3.5     The protocol interface requirements for SS7 Network
                        Interconnection include the MTP, ISDNUP, SCCP and TCAP.
                        These protocol interfaces shall conform to the following
                        specifications:

                        18.5.3.5.1 Bellcore GR-905-CORE, Common Channel
                        Signaling Network Interface Specification (CCSNIS)
                        Supporting Network Interconnection, Message Transfer
                        Part (MTP), and Integrated Services Digital Network User
                        Part (ISDNUP);

                        18.5.3.5.2 Bellcore GR-1428-CORE, CCS Network Interface
                        Specification (CCSNIS) Supporting Toll Free Service;

                                       69
<PAGE>

                        18.5.3.5.3 Bellcore  GR-1429-CORE,  CCS Network
                        Interface  Specification (CCSNIS) Supporting Call
                        Management Services; and

                        18.5.3.5.4 Bellcore GR-1432-CORE, CCS Network Interface
                        Specification (CCSNIS) Supporting Signaling Connection
                        Control Part (SCCP) and Transaction Capabilities
                        Application Part (TCAP).

           18.5.3.6     To the extent technically feasible, U S WEST shall set
                        message screening parameters to block accept messages
                        from Pac-West local or tandem switching systems destined
                        to any signaling point in the U S WEST SS7 network with
                        which the Pac-West switching system has a legitimate
                        signaling relation.

      18.5.4  SS7 Network Interconnection shall be equal to or better than all
              of the requirements for SS7 Network Interconnection set forth in
              the following technical references:

           18.5.4.1     ANSI T1.110-1992 American National Standard
                        Telecommunications Signaling System Number 7 (SS7) -
                        General Information;

           18.5.4.2     ANSI T1. 111-1992 American National Standard for
                        Telecommunications - Signaling System Number 7 (SS7) -
                        Message Transfer Part (MTP);

           18.5.4.3     ANSI T1. 111A-1994 American National Standard for
                        Telecommunications - Signaling System Number 7 (SS7) -
                        Message Transfer Part (MTP) Supplement;

           18.5.4.4     ANSI T1. 112-1992 American National Standard for
                        Telecommunications - Signaling System Number 7 (SS7) -
                        Signaling Connection Control Part (SCCP);

           18.5.4.5     ANSI T1. 113-1995 American National Standard for
                        Telecommunications - Signaling System Number 7 (SS7) -
                        Integrated Services Digital Network (ISDN) User Part;

           18.5.4.6     ANSI T1. 114-1992 American National Standard for
                        Telecommunications - Signaling System Number 7 (SS7) -
                        Transaction Capabilities Application Part (TCAP);

           18.5.4.7     ANSI T1. 115-1990 American National Standard for
                        Telecommunications - Signaling System Number 7 (SS7) -
                        Monitoring and Measurements for Networks;

           18.5.4.8     ANSI T1. 116-1990 American National Standard for
                        Telecommunications - Signaling System Number 7 (SS7) -
                        Operations, Maintenance and Administration Part (OMAP);

                                       70
<PAGE>

           18.5.4.9     ANSI T1. 118-1992 American National Standard for
                        Telecommunications - Signaling System Number 7 (SS7) -
                        Intermediate Signaling Network Identification (ISNI);

           18.5.4.10    Bellcore GR-905-CORE, Common Channel Signaling Network
                        Interface Specification (CCSNIS) Supporting Network
                        Interconnection, Message Transfer Part (MTP), and
                        Integrated Services Digital Network User Part (ISDNUP);

           18.5.4.11    Bellcore GR-954-CORE, CCS Network Interface
                        Specification (CCSNIS) Supporting Line Information
                        Database (LIDB) Service;

           18.5.4.12    Bellcore GR-1428-CORE, CCS Network Interface
                        Specification ("CCSNIS") Supporting Toll Free Service;

           18.5.4.13    Bellcore GR-1429-CORE, CCS Network Interface
                        Specification (CCSNIS) Supporting Call Management
                        Services; and

           18.5.4.14    Bellcore GR-1432-CORE, CCS Network Interface
                        Specification (CCSNIS) Supporting Signaling Connection
                        Control Part (SCCP) and Transaction Capabilities
                        Application Part (TCAP).

                                       71
<PAGE>

                                                                  Attachment 4

                               TABLE OF CONTENTS

 1. Definitions .............................................1
 2. General Description .....................................1
 3. Location of Interconnection .............................2
 4. Collocation .............................................2
 5. Entrance Facility .......................................2
 6. Quality of Interconnection ..............................2
 7. Points of Interconnection ...............................2
 8. Trunking Requirements ...................................3
 9. Service Interruptions ...................................5
 10. Forecasting ............................................5
 11. Signaling ..............................................7
 12. Ordering ...............................................8
 13. Network Management .....................................8
 14. Usage Measurement ......................................9
 15. Audiotext and Mass Announcement Services ...............9
 16. Interconnection to Network Elements ....................9
 17. Reciprocal Traffic Exchange ............................12

                                       1
<PAGE>

INTERCONNECTION

1.       Definitions

         1.1      For purposes of this Attachment 4, "Interconnection" is the
                  linking of the U S WEST and Pac-West networks for the mutual
                  exchange of traffic. Interconnection does not include the
                  transport and termination of traffic. Interconnection is
                  provided by virtual or physical collocation, entrance
                  facilities or meet point arrangements.

2.       General Description

         2.1      U S WEST will provide Interconnection at any technically
                  feasible point, subject to negotiations between the Parties;
                  such points may include, but not be limited to, a Meet Point,
                  the line side distribution frame of the local switch, the
                  trunk side distribution frame of the local switch, trunk
                  interconnection points of the tandem switch, central office
                  cross-connect points, and Signaling Transfer Points necessary
                  to exchange traffic and access call related databases.1

         2.2      Pac-West shall designate at least one POI in the LATA in which
                  Pac-West originates local traffic and interconnects with U S
                  WEST.(2) Pac-West will be responsible for engineering and
                  maintaining its network on its side of the POI. If and when
                  the Parties choose to interconnect at a mid-span meet,
                  Pac-West and U S WEST will jointly provision the fiber optic
                  facilities that connect the two (2) networks and shall share
                  the financial and other responsibilities for that facility.

         2.3      Within ten (10) Business Days of Pac-West's request for any
                  POI, U S WEST shall provide any information in its possession
                  or available to it regarding the environmental conditions of
                  the interconnection route or location including, but not
                  limited to, the existence and condition of asbestos, lead
                  paint, hazardous substance contamination, or radon.
                  Information is considered "available" under this Agreement if
                  it is in U S WEST's possession, or in the possession of a
                  current or former agent, contractor, employee, lessor, or
                  tenant of U S WEST's.

         2.4      U S WEST shall allow Pac-West to perform any environmental
                  site investigations, including, but not limited to, asbestos
                  surveys, Pac-West deems to be necessary in support of its
                  collocation needs. Pac-West shall advise U S WEST in writing
                  of its intent to conduct any such investigations, and shall
                  receive written approval from U S WEST to proceed with the
                  investigation, which approval shall not be unreasonably
                  withheld. Pac-West shall indemnify U S WEST in accordance with
                  the provisions of Section 18 of Part A of this Agreement for
                  any loss or claim for damage suffered by U S WEST as a result
                  of Pac-West's actions during any site inspection.

----------

1    MCIm Order, p. 6 at Issue 2 and AT&T Order at Issue 3(a).

2    MCIm Order, p. 6 at Issue 2 and AT&T Order at Issue 3(a).

                                       1
<PAGE>

3.       Location of Interconnection

         3.1      Pac-West will be responsible for implementing and maintaining
                  its network on its side of the POI. U S WEST will be
                  responsible for implementing and maintaining its network on
                  its side of the POI. If and when the Parties choose to
                  interconnect at a Meet Point, Pac-West and U S WEST will
                  jointly provision the fiber optic facilities that connect the
                  two networks and shall proportionately share the financial and
                  other responsibilities for that facility based on the
                  reasonably negotiated Meet Point percentage.

         3.2      If Interconnection is complicated by the presence of
                  environmental contamination or hazardous materials, and an
                  alternative route is available, U S WEST shall make such
                  alternative route available for Pac-West's consideration.

4.       Collocation

         4.1      Interconnection may be accomplished through either virtual or
                  physical Collocation. The terms and conditions under which
                  Collocation will be available are described in Part A of this
                  Agreement.

5.       Entrance Facility

         5.1      Interconnection may be accomplished using an entrance facility
                  without the need for collocation. An entrance facility extends
                  from the Point of Interface to a point within a U S WEST
                  central office.

6.       Quality of Interconnection

         6.1      U S WEST will not, for the purpose of Interconnection, provide
                  to Pac-West less favorable terms and conditions than it
                  provides itself or any other Person or in a manner less
                  efficient than it would impose on itself or any other Person.
                  The quality of Interconnection will be at least equal to that
                  U S WEST provides to itself or any other Person. To the extent
                  that Pac-West requests higher or lower quality
                  Interconnection, Pac-West agrees to use the Bona Fide Request
                  process described in Part A of this Agreement.

7.       Points of Interconnection

         7.1      Upon a request for specific point to point routing, U S WEST
                  will make available to Pac-West information indicating the
                  location and technical characteristics of U S WEST's network
                  facilities. The following alternatives are negotiable and
                  include, but are not limited to: (a) a DS-1 or DS-3 entrance
                  facility, where facilities are available (where facilities are
                  not available and U S WEST is required to build special or
                  additional facilities, special construction charges may
                  apply); (b) virtual collocation; (c) physical collocation; and
                  (d) negotiated Meet Point facilities. Each Party is
                  responsible for providing its own facilities up to the Meet
                  Point. The Parties will negotiate the facilities arrangement
                  between their networks.

                                       2
<PAGE>

8.       Trunking Requirements

         8.1      U S WEST agrees to provide designed interconnection facilities
                  that meet the same industry standards for technical criteria
                  and service standards, such as the probability of blocking in
                  peak hours and transmission standards.

         8.2      The Parties shall initially reciprocally terminate local
                  exchange traffic and intraLATA/interLATA toll calls
                  originating on each other's networks as follows:

                  8.2.1    There shall be no restrictions on traffic types
                           carried. Until the access structure is revised, to
                           accommodate non-segregated traffic, pursuant to rules
                           promulgated by the FCC or the Commission, two-way
                           trunk groups will be established wherever practical,
                           based upon Pac-West's request. If Local Traffic and
                           Toll Traffic are combined in one (1) trunk group,
                           Pac-West shall provide a measure of the amount of
                           local and toll traffic relevant for billing purposes
                           to U S WEST. U S WEST may audit the traffic reported
                           to it by Pac-West if it has reason to believe the
                           reported measurement is not accurate. Such audit
                           shall be conducted in accordance with the Audit
                           Section set forth in this Agreement.(3) Exceptions to
                           this provision will not be based on technical
                           infeasibility, but will be based on billing,
                           signaling, and network requirements. For example,
                           exceptions include: (a) billing requirements -
                           switched access vs. local traffic, (b) signaling
                           requirements - MF vs. SS7, (c) network requirements -
                           Directory Assistance traffic to TOPS tandems, and (d)
                           one-way trunks for 911/E911. The following is the
                           current list of traffic types that require separate
                           trunk groups, unless otherwise specifically stated in
                           this Agreement:

                           (a)      intraLATA toll and interLATA switched access
                                    trunks
                           (b)      EAS/local trunks
                           (c)      Directory Assistance trunks
                           (d)      911/E911 trunks
                           (e)      Operator Services trunks
                           (f)      Non-U S WEST toll(transit toll to other
                                    providers)
                           (g)      Non-U S WEST local (transit local to
                                    other providers)
                           (h)      Commercial Mobile Radio Service/Wireless
                                    traffic

         8.3      Separate trunk groups will be established connecting
                  Pac-West's switch or Pac-West's Operator Service center to U S
                  WEST's Operator Service center for operator-assisted busy line
                  interrupt/verify. For traffic from the U S WEST network to
                  Pac-West for Operator Services, U S WEST will provide one (1)
                  trunk group per LATA served by the local U S WEST switch.

----------

3        AT&T Order, p. 37.

                                       3
<PAGE>

8.4      Trunk Servicing

         8.4.1    Orders between the Parties to establish, add, change or
                  disconnect trunks shall be processed by use of an Access
                  Service Request ("ASR") or another industry standard for local
                  service ordering.

         8.4.2    As further described in this Agreement, both Parties will
                  jointly manage the capacity of Local Interconnection trunk
                  groups. U S WEST's trunk servicing group will send a Trunk
                  Group Service Request ("TGSR"), or another industry standard
                  eventually adopted to replace the TGSR, to Pac-West to trigger
                  changes U S WEST desires to the Local Interconnection trunk
                  groups based on U S WEST's capacity assessment. Pac-West will
                  issue an ASR or other industry ordering standard to U S WEST:

                  (a)      within ten (10) Business Days after receipt of the
                           TGSR, upon review of and in response to U S WEST's
                           TGSR, or

                  (b)      at any time, as a result of Pac-West's own capacity
                           management assessment, to begin the provisioning
                           process. The interval used for the provisioning of
                           Local Interconnection trunk groups shall be no longer
                           than the standard interval for the provisioning of U
                           S WEST's Switched Access service and shall be
                           consistent with U S WEST's actual provisioning
                           intervals for its own Switched Access customers.

         8.4.3    U S WEST will attempt to meet Pac-West's requested due date
                  for the provision of Local Interconnection trunk groups. Where
                  the installation of Local Interconnection trunk groups is
                  required within a time that is shorter than the standard
                  interval, the Parties will make all reasonable efforts and
                  cooperate in good faith to ensure that the mutually agreed
                  upon due date is met

         8.4.4    Orders that comprise a major project may be submitted at the
                  same time, in which case their implementation shall be jointly
                  planned and coordinated. Major projects are those that require
                  the coordination and execution of multiple orders or related
                  activities between and among U S WEST and Pac-West work
                  groups, including, but not limited to, the initial
                  establishment of Local Interconnection or Meet Point trunk
                  groups and service in an area, NXX code moves, re-homes,
                  facility grooming, or network rearrangements.

8.5      Trunking Requirements

         8.5.1    Trunk group connections will be made at a DS-1 or multiple
                  DS-1 level for exchange of EAS/local, intraLATA toll,
                  wireless/Commercial Mobile Radio Service, and Switched Access
                  Traffic. Ancillary Service trunk groups will be made below a
                  DS-1 level, as agreed to by the Parties.

         8.5.2    Where CCS is not available, in-band multi-frequency (MF) wink
                  start signaling will be provided. This MF arrangement will
                  require a separate local trunk circuit between Pac-West's
                  switch and U S WEST's tandems. Reference Technical Pub. TR-314
                  and TR394.

                                       4
<PAGE>

9.       Service Interruptions

         9.1      Standards and procedures for notification of trunk disconnects
                  will be jointly developed by the Parties within ninety (90)
                  days of the Effective Date of this Agreement. Neither Party
                  shall be expected to maintain active status for a trunk
                  disconnected by the other Party for an extended or indefinite
                  period of time.

         9.2      The characteristics and methods of operation of any circuits,
                  facilities or equipment of either Party connected with the
                  services, facilities or equipment of the other Party pursuant
                  to this Agreement shall not: (a) interfere with or impair
                  service over any facilities of the other Party; its
                  Affiliates, or its connecting and concurring carriers involved
                  in its services; (b) cause damage to their plant; (c) violate
                  any applicable law or regulation regarding the invasion of
                  privacy of any communications carried over the Party's
                  facilities; or (d) create hazards to the -employees of either
                  Party or to the public.

         9.3      Each Party shall be solely responsible, and bear the expense,
                  for the overall design of its services. Each Party shall also
                  be responsible for any redesign or rearrangement of its
                  services that may be required because of changes in
                  facilities, operations or procedures, minimum network
                  protection criteria, and operating or maintenance
                  characteristics of the facilities. If one Party creates a
                  circumstance causing additional costs to the other Party, the
                  other Party may collect construction charges from the first
                  Party.

         9.4      To facilitate trouble reporting and to coordinate the repair
                  of the service provided by each Party to the other under this
                  Agreement, each Party shall designate and define a Trouble
                  Reporting Control Office ("TRCO") for such service. Each Party
                  shall furnish a trouble reporting telephone number for the
                  designated TRCO. This number shall have access to the location
                  where facility records are normally located and where current
                  status reports on any trouble reports are readily available.
                  Current and historical trouble reports will be made available,
                  if necessary. Alternative out-of-hours procedures shall be
                  established to ensure access to a location that is staffed and
                  has the authority to initiate corrective action.

         9.5      Where new facilities, services and arrangements are installed
                  to rectify the service interruption, the TRCO shall ensure
                  that continuity exists and take appropriate transmission
                  measurements before advising the other Party that the new
                  circuit is ready for service.

         9.6      The Parties shall cooperate in isolating trouble conditions.
                  Before either Party reports a trouble condition, it shall use
                  reasonable efforts to isolate the trouble.

         9.7      In cases where a trouble condition affects a significant
                  portion of the other Party's service, the Parties shall assign
                  the same priority provided to other interconnecting carriers.

10.      Forecasting

         10.1     The Parties agree that during the first year of
                  Interconnection, joint forecasting and planning meetings will
                  take place no less frequently than once per quarter.

         10.2     The Parties shall establish joint forecasting responsibilities
                  for traffic utilization over trunk groups. Intercompany
                  forecast information must be provided by the Parties to each
                  other four (4) times a year. The quarterly forecasts shall
                  include forecasted requirements for each

                                       5
<PAGE>

         trunk group identified in Paragraph 8.2.1 of this Attachment. In
         addition, for tandem switched traffic, the forecast shall include the
         quantity of tandem-switched traffic forecasted for each subtending end
         office. The Parties recognize that, to the extent historical traffic
         data can be shared between the Parties, the accuracy of the forecasts
         will improve. Forecasts shall be for a minimum of three (3) (current
         and plus-1 and plus-2) years and shall include:

         10.2.1   the use of Common Language Location Identifier (CLLI-MSG),
                  which is described in Bellcore documents BR 795-100-100 and BR
                  795-400-100; and

         10.2.2   a description of major network projects anticipated for the
                  following six (6) months that could affect the other Party.
                  Major network projects include trunking or network
                  rearrangements, shifts in anticipated traffic patterns, or
                  other activities that are reflected by a significant increase
                  or decrease in trunking demand for the following forecasting
                  period. This planning will include the issues of network
                  capacity, forecasting and compensation calculation, where
                  appropriate.

         10.2.3   If forecasts vary significantly, the Parties shall meet to
                  review and reconcile such forecasts.

                  10.2.3.1       If the Parties are unable to reach such a
                                 reconciliation, the Local Interconnection trunk
                                 groups shall be provisioned to the higher
                                 forecast. At the end of three (3) months, the
                                 utilization of the Local Interconnection trunk
                                 groups will be reviewed and if the average CCS
                                 utilization for the third month is under
                                 seventy five percent (75%) of capacity, either
                                 Party may issue an order to resize the trunk
                                 group, which shall be left with not less than
                                 twenty five percent (25%) excess capacity.

                  10.2.3.2       If the Parties agree on the original forecast
                                 and then it is determined that a trunk group is
                                 under seventy five percent (75%) of CCS
                                 capacity on a monthly-average basis for each
                                 month of any three month period, either Party
                                 may issue an order to resize the trunk group,
                                 which shall be left with not less than twenty
                                 five percent (25%) excess capacity. In all
                                 cases, grade of service objectives identified
                                 in this Agreement shall be maintained.

         10.3    Each Party shall provide a specified point of contact for
                 planning, forecasting and trunk serving purposes.

         10.4    Trunking can be established to tandems or end offices or a
                 combination of both via either one-way or two-way trunks.
                 Trunking will be at the DS-0 level, DS-1 level, DS-3 level, or
                 any other technically feasible level, subject to network
                 disclosure requirements of the FCC. Initial trunking will be
                 established between Pac-West's switching centers and U S WEST's
                 access tandem(s). The Parties will utilize direct end office
                 trunking under the following conditions:

                  10.4.1   Tandem exhaust - If a tandem through which the
                           Parties are interconnected is unable to, or is
                           forecasted to be unable to, support additional
                           traffic loads for any

                                       6
<PAGE>

                  period of time, the Parties will mutually agree on an end
                  office trunking plan that will alleviate the tandem capacity
                  shortage and ensure completion of traffic between Pac-West and
                  U S WEST subscribers.

         10.4.2   Traffic volume - The Parties shall install and retain direct
                  end office trunking sufficient to handle actual or reasonably
                  forecasted traffic volumes, whichever is greater, between an
                  Pac-West switching center and a U S WEST end office where the
                  local traffic exceeds or is forecasted to exceed 512 CCS at
                  the busy hour.

         10.4.3   Mutual agreement - The Parties may install direct end office
                  trunking upon mutual agreement in the absence of conditions
                  (1) or (2) above, which agreement shall not unreasonably be
                  withheld.

         10.5     Grade of Service:

                  A blocking standard of one percent (1%) during the average
                  busy day-busy hour, as defined by each Party's standards, for
                  final trunk groups between an Pac-West end office and a U S
                  WEST access tandem carrying Meet Point traffic shall be
                  maintained. All other final trunk groups are to be engineered
                  with a blocking standard of one percent (1%). Direct end
                  office trunk groups are to be engineered with a blocking
                  standard of one percent (1%).

11.      Signaling

         11.1     Signaling protocol. The Parties will interconnect their
                  networks using SS7 signaling as defined in GR-317 and GR-394,
                  including ISDN User Part ("ISUP") for trunk signaling and
                  Transaction Capabilities Application Part ("TCAP") for
                  CCS-based features in the interconnection of their networks.
                  All appropriate industry standards for signaling
                  interoperability will be followed.

         11.2     The Parties will provide CCS to each other in conjunction with
                  all trunk groups supporting Local, Transit, and Toll Traffic.
                  The Parties will cooperate on the exchange of TCAP messages to
                  facilitate full interoperability of CCS-based features between
                  their respective networks, including all CLASS features and
                  functions. All CCS signaling parameters will be provided,
                  including automatic number identification (ANI), originating
                  line information (OLI), calling party category, charge number,
                  etc. For terminating Feature Group D, the Parties will pass
                  CPN if it receives CPN from Feature Group D carriers. All
                  privacy indicators will be honored. Where available, network
                  signaling information such as Transit Network Selection
                  ("TNS") parameter (CCS platform) and CIC/OZZ information
                  (non-CCS environment) will be provided by the Parties wherever
                  such information is needed for call routing or billing. The
                  Parties will follow all appropriate industry standards
                  pertaining to TNS and CIC/OZZ codes.

         11.3     Standard Interconnection facilities shall be Extended
                  Superframe (ESF) with B8ZS line code. Where ESF/B8ZS is not
                  available, Pac-West will agree to using other Interconnection
                  protocols on an interim basis until the standard ESF/B8ZS is
                  available. U S WEST will provide anticipated dates of
                  availability for those areas not currently ESF/B8ZS
                  compatible.

         11.4     Where Pac-West is unwilling to utilize an alternate
                  Interconnection protocol, Pac-West will provide U S WEST an
                  initial forecast of 64 Kbps clear channel capability ("64K
                  CCC") trunk quantities within thirty (30) days of the
                  Effective Date of this Agreement consistent with the

                                       7
<PAGE>

                  forecasting agreements between the Parties. Upon receipt of
                  this forecast, the Parties will begin joint planning for the
                  engineering, procurement, and installation of the designated
                  64K CCC Local Interconnection trunk groups and the associated
                  B8ZS Extended Super Frame facilities, for the purpose of
                  transmitting 64K CCC data calls between Pac-West and U S WEST.
                  Where additional equipment is required, such equipment will be
                  obtained, engineered, and installed on the same basis and with
                  the same intervals as any similar growth job for an IXC,
                  Pac-West or U S WEST internal customer demand for 64K CCC
                  trunks. Where technically feasible, these trunks will be
                  established as two-way.

12.(4)   Ordering

         12.1     Pac-West may order Interconnection points beyond those listed
                  in the FCC rules using the ASIR process or other industry
                  standard for local service ordering.

         12.2     U S WEST must provide installation to Pac-West in the shorter
                  of the time it provides installation to itself or any other
                  Person. U S WEST must provide installation to Pac-West within
                  ten (10) Business Days if it does not provide the same
                  installation to itself or any other Person.

         12.3     If Pac-West requests a shorter installation time than required
                  by the provisions of this Attachment, U S WEST may charge
                  Pac-West for any increased expense incurred for such
                  installation.

          12.4    Pac-West shall, on each order for Local Interconnection
                  trunks, specify the Pac-West NXXs that are assigned to the
                  trunks.

13.      Network Management

          13.1    Protective Protocols

                  Either Party may use protective network traffic management
                  controls such as 7-digit and 10-digit code gaps on traffic
                  toward each others network when required to protect the public
                  switched network from congestion due to facility failures,
                  switch congestion or failure or focused overload.

          13.2    Rerouting Protocols

                  Where the capability exists, originating or terminating
                  traffic reroutes may be implemented by either Party to
                  temporarily relieve network congestion due to facility
                  failures or abnormal calling patterns Reroutes will not be
                  used to circumvent normal trunk servicing. Rerouting controls
                  will only be used when mutually agreed to by the Parties.

          13.3    Mass Calling

                  Pac-West and U S WEST shall cooperate and share pre-planning
                  information, where available and in compliance with federal
                  and state regulations, regarding cross-network call

----------

4        MCIm Order, p. 5 at Issue 1.

                                       8
<PAGE>

                  ins expected to generate large or focused temporary increases
                  in call volumes, to prevent or mitigate the impact of these
                  events on the public switched network. Furthermore, INP
                  numbers may only be used consistent with network efficiency
                  and integrity, i.e., inhibitions on mass calling events.

14.      Usage Measurement

         14.1     When applicable, each Party shall provide to the other

                  14.1.1   Bellcore AMA formatted records to generate bills to
                           the other Party;

                  14.1.2   measurement of minutes of use over Local
                           Interconnection trunk groups in actual conversation
                           seconds. The total conversation seconds over each
                           individual Local Interconnection trunk group will be
                           totaled for the entire monthly bill-round and then
                           rounded to the next whole minute; and

                  14.1.3   within twenty (20) calendar days after the end of
                           each quarter (commencing with the first full quarter
                           after the Effective Date of this Agreement), a usage
                           report with the total traffic volume described in
                           terms of minutes and messages and by call type (i.e.,
                           local, toll, and other) terminated to each other over
                           SS7 local interconnection trunk groups.

15.      Audiotext and Mass Announcement Services

         The Parties agree that access to the audiotext, mass announcement and
         information services of one Party may be made available to the other
         Party upon execution of a separate agreement or an amendment to this
         Agreement.

16.      Interconnection to Network Elements

         16.1     Technical Requirements

                  16-1.1   When requested by Pac-West, U S WEST shall provide
                           Interconnection between U S WEST Network Elements
                           provided to Pac-West and Pac-West's network at
                           transmission rates designated by Pac-West. If
                           additional equipment beyond that which U S WEST
                           currently has in place is planning to put in place or
                           is otherwise required to have in place is required to
                           meet such transmission rates, the installation and/or
                           acquisition of such equipment shall be accomplished
                           pursuant to the ordering process set forth in this
                           Agreement.

                  16.1.2   Traffic shall be combined and routed as follows:

                           16.1.2.1      At Pac-West's request, U S WEST shall
                                         receive Pac-West traffic destined to
                                         the U S WEST Operator Systems Network
                                         Element, on trunks from an Pac-West
                                         end-office or an Pac-West tandem.

                           16.1.2.2)     At Pac-West's request, U S WEST shall
                                         receive Pac-West CAMA-ANI (Centralized
                                         Automatic Message Accounting -
                                         Automatic Number

                                       9
<PAGE>

                                identification) traffic destined to the U S WEST
                                911 PSAPs, or E911 tandems, on trunks from an
                                Pac-West end-office.

                  16.1.2.3      At Pac-West's request, U S WEST shall receive
                                Pac-West SS7 traffic destined to any U S WEST
                                E911 tandem on trunks from an Pac-West
                                end-office, when SS7 E911 signaling is available
                                in U S WEST's network.

         16-1.3   When requested by Pac-West and a third party carrier, U S WEST
                  shall provide interconnections between Pac-West's network, and
                  the other carrier's network through the U S WEST network at
                  transmission rates designated by Pac-West, including, but not
                  limited to, DS-1, DS-3, and STS-1, where available. U S WEST
                  shall combine and route traffic to and from other local
                  carriers and interLATA carriers through the U S WEST network,
                  and, at Pac-West's request, U S WEST shall record and keep
                  records of such traffic for Pac-West billing purposes to the
                  extent possible.

         16.1.4   U S WEST shall provide two-way trunk groups for
                  Interconnections. At Pac-West's request, and consistent with
                  an efficient network architecture, U S WEST shall provide
                  unidirectional traffic on such trunks, in either direction,
                  effectively operating them as if they were one-way trunk
                  groups.

         16.1.5   All trunking provided by U S WEST shall adhere to the
                  applicable performance requirements set forth in the "General
                  Performance Requirements" section of this Agreement, pursuant
                  to Sections 1.3.1 and 1.3.2 of Part A of this Agreement.

         16.1.6   At Pac-West's request, U S WEST shall work cooperatively with
                  Pac-West to provide for overflow routing from a given trunk
                  group or groups onto another trunk group or groups as Pac-West
                  designates.

         16.1.7   U S WEST and Pac-West shall agree on the establishment of
                  two-way trunk groups for the exchange of traffic for other
                  IXCs. These trunk groups can be provided in a meet point
                  arrangement.

         16.1.8   Interconnection shall be made available upon Pac-West's
                  request at any technically feasible Point of Interface. All
                  trunk interconnections shall be provided, including SST MF,
                  DTMF, DialPulse, PRI-ISDN (where available), DID (Direct
                  Inward Dialing), CAMA-ANI, and trunking necessary so that INP
                  can be provided.

16.2     Trunk Interface Requirements

         16.2.1   E911 Trunks

                  16.2.1.1    U S WEST shall allow Pac-West to provide direct
                              trunking to each U S WEST E911 end office or
                              tandem, as is appropriate for the applicable
                              serving area. These trunks are to be provided as
                              one-way trunks from a given Pac-West end office to
                              the U S WEST E911 end office or tandem.

                                       10
<PAGE>

                  16.2.1.2)    US WEST shall provide for over-flow E911 traffic
                               in the same manner that U S WEST provides E911
                               overflow for itself.

         16.2.2   S911 Trunks

                  If and when S911 tandems become available in the U S WEST
                  network, U S WEST shall allow Pac-West to provide direct
                  trunking to each U S WEST S911 tandem. Such SS7 trunks are to
                  be provided as one-way trunks from a given Pac-West endoffice
                  to the U S WEST S911 tandem.

         16.2.3   Local Switch and Access Tandem Trunks

                   16.2.3.1    U S WEST shall provide trunks groups provisioned
                               exclusively to carry intraLATA Toll Traffic, as
                               designated by Pac-West.

                   16.2.3.2    U S WEST shall provide trunk groups provisioned
                               exclusively to carry interLATA traffic, as
                               designated by Pac-West.

                   16.2.3.3     U S WEST shall provide SS7 trunks which provide
                                SS7 Interconnection. At Pac-West's request, MF
                                trunks may be substituted for SS7 trunks where
                                applicable.

                   16.2.3.4     US WEST shall simultaneously route calls based
                                on dialed digits (in accordance with the
                                standard GR-317-CORE), and Carrier
                                Identification Code (in accordance with the
                                standard GR-394-CORE) over a single SS7 trunk
                                group.

         16.2.4   U S WEST Operator Services Trunk

                  U S WEST shall provide Operator Services trunks as one-way
                  trunks from the U S WEST network to the Pac-West network.

 16.3    Network Interconnection between U S WEST and Pac-West shall meet or
         exceed all of the requirements for network Interconnection set forth in
         the following technical references:

          16.3.1  GR-317-CORE, Switching System Generic Requirements for Call
                  Control Using the Integrated Services Digital Network User
                  Part (ISDNUP), Bellcore, February 1994;

          16.3.2  GR-394-CORE,  Switching System Generic  Requirements for
                  Interexchange  Carrier  Interconnection Using the Integrated
                  Services Digital Network User Part (ISDNUP), Bellcore,
                  February 1994;

          16.3.3  FR-NWT-000271, OSSGR Operator Services Systems Generic
                  Requirements, Bellcore, 1994 Edition; and

          16.3.4  FR-NWT-000064, LATA Switching Systems Generic Requirements
                  (LSSGR), Bellcore, 1994 Edition.

                                       11
<PAGE>

17.      Reciprocal Traffic Exchange

         17.1     Scope

                  Reciprocal traffic exchange addresses the exchange of traffic
                  between Pac-West end users and U S WEST end users. If such
                  traffic is local, the provisions of this Agreement shall
                  apply. Where either Party acts as an intraLATA toll provider
                  or interLATA IXC or where either Party interconnects and
                  delivers traffic to the other from third parties, each Party
                  shall bill such third parties the appropriate charges pursuant
                  to its respective tariffs or contractual offerings for such
                  third party terminations. Absent a separately negotiated
                  agreement to the contrary, compensation for reciprocal traffic
                  exchange applies solely to traffic exchanged directly between
                  the Parties without the use of third party transit providers.

         17.2     Responsibilities of the Parties

                  17.2.1   U S WEST and Pac-West agree to treat each other
                           fairly, nondiscriminatorily, and equally for all
                           items included in this Agreement, or related to the
                           support of items included in this Agreement.

                  17.2.2   Pac-West and U S WEST agree to exchange such reports
                           and/or data as provided in this Agreement to
                           facilitate the proper billing of traffic.

                  17.2.3   [intentionally left blank for numbering consistency]

                  17.2.4   Pac-West and U S WEST shall share responsibility for
                           all Control Office functions for Local
                           Interconnection trunks and trunk groups, and both
                           Parties shall share the overall coordination,
                           installation, and maintenance responsibilities for
                           these trunks and trunk groups.

                  17.2.5   The Party that performs the End Office function is
                           responsible for all Control Office functions for the
                           meet point trunking arrangement trunks and trunk
                           groups, and shall be responsible for the overall
                           coordination, installation, and maintenance
                           responsibilities for these trunks and trunk groups.

                  17.2.6   Pac-West and U S WEST shall:

                           17.2.6.1     Provide trained personnel with adequate
                                        and compatible test equipment to work
                                        with each other's technicians.

                           17.2.6.2     Notify each other when there is any
                                        change affecting the service requested,
                                        including the due date.

                           17.2.6.3     Coordinate and schedule testing
                                        activities of their own personnel, and
                                        others as applicable, to ensure its
                                        Interconnection trunks/trunk groups are
                                        installed per the Interconnection order,
                                        meet agreed-upon acceptance test
                                        requirements, and are placed in service
                                        by the due date.

                                       12
<PAGE>

                           17.2.6.4     Perform sectionalization to determine if
                                        a trouble is located in its facility or
                                        its portion of the Interconnection
                                        trunks prior to referring the trouble to
                                        each other.

                           17.2.6.5     Advise each others Control Office if
                                        there is an equipment failure which may
                                        affect the Interconnection trunks.

                           17.2.6.6     Provide each other with a trouble
                                        reporting/repair contact number that is
                                        readily accessible and available
                                        twenty-four (24) hours per day, seven
                                        (7) days per week. Any changes to this
                                        contact arrangement must be immediately
                                        provided to the other Party.

                           17.2.6.7     Provide to each other test-line numbers
                                        and access to test lines.

                           17.2.6.8     Cooperatively plan and implement
                                        coordinated repair procedures for the
                                        meet point and Local Interconnection
                                        trunks and facilities to ensure trouble
                                        reports are resolved in a timely and
                                        appropriate manner.

      17.3     Types of Traffic

               17.3.1  The types of traffic to be exchanged or provided under
                       this Agreement include, but are not limited to, the
                       following:

                  17.3.1.1     EAS/Local Traffic,
                  17.3.1.2     Transit Traffic,
                  17.3.1.3     Switched Access Traffic,
                  17.3.1.4     Ancillary traffic includes all traffic destined
                               for Ancillary Services, or that may have special
                               billing requirements, including, but not limited
                               to, the following:

                                (a) Directory Assistance
                                (b) 911 /E91 1
                                (c) Operator call termination (busy line
                                    interrupt and verify)
                                (d) 800/888 database dip
                                (e) LIDB
                                (f) Information services requiring
                                    special billing.

                  17.3.1.5      Unless otherwise stated in this Agreement,
                                ancillary traffic will be exchanged in
                                accordance with whether the traffic is
                                Local/EAS, intraLATA toll, or Switched Access.

      17.4     Transport and Termination of Exchange Traffic

               17.4.1 Termination of Local Traffic

                                       13
<PAGE>

         Local Traffic will be terminated pursuant to the Reciprocal
         Compensation described in Attachment 1.

  17.4.2 EAS/Local Traffic

         As negotiated between the Parties, the exchange of local traffic
         between the Parties may occur in several ways.

         (a) While the Parties anticipate the use of two-way trunks for the
         delivery of Local Traffic, either Party may elect to provision its own
         one-way trunks for delivery of Local Traffic to be terminated on the
         other Party's network at the "initial" point of Interconnection;

         (b) The Parties may elect to purchase transport services from each
         other or from a third party. Such transport delivers the originating
         Party's Local Traffic to the terminating Party's end office or tandem
         for call termination. Transport may be purchased as either tandem
         switched transport (which is included in the tandem call termination
         rate) or direct trunk transport;

         (c) To the extent that Pac-West has established a Collocation
         arrangement at a U S WEST end office location, and has available
         capacity, the Parties agree that Pac-West shall provide two-way direct
         trunk facilities, when required, from that end office to the Pac-West
         switch. In all other cases, the direct facility may be provisioned by U
         S WEST or Pac-West or a third party. If both Pac-West and U S WEST
         desire to provision the facility and cannot otherwise agree, the
         Parties may agree to resolve the dispute through the submission of
         competitive bids.

17.4.3 Transit Traffic

         17.4.3.1 U S WEST will accept traffic originated by Pac-West and will
         terminate it at a point of interconnection with another CLEC, Exchange
         Carrier, IXC or Wireless Carrier. U S WEST will provide this transit
         service through Tandem Office Switches. Pac-West may also provide U S
         WEST with transit service.

         17.4.3.2 The Parties expect that all networks involved in transporting
         Transit Traffic will deliver calls to each involved network with
         CCS/SS7 protocol and the appropriate ISUP/TCAP message to facilitate
         full interoperability and billing functions. In all cases, the
         originating company is responsible to follow the EMR standard and to
         exchange records with both the transiting company and the terminating
         company, to facilitate the billing process to the originating network.

         17.4.3.3 The Parties will use industry standards developed to handle
         the provision and billing of Switched Access by multiple providers
         (MECAB, MECOD and the Parties' FCC tariffs).

17.4.4 Toll Traffic

         Toll Traffic routed to an access tandem, or directly routed to an end
         office, will be terminated as Switched Access Service.

                                       14
<PAGE>

17.5     Interface Code Availability And Optional Features

         17.5.1   Interface Code Availability

                  Supervisory Signaling specifications, and the applicable
                  network channel interface codes for Local Interconnection
                  trunks, are the same as those used for Feature Group D
                  Switched Access Service, as described in the Parties'
                  applicable Switched Access tariffs.

         17.5.2   Optional Features

                  17.5.2.1 Inband MF or SS7 Out of Band Signaling

                  Inband MF signaling and SS7 out of band signaling are
                  available for local trunks. MF signaling or SS7 out-of-band
                  signaling must be requested on the order for the new local
                  trunks. Provisioning of the local trunks equipped with MF
                  signaling or SS7 out of band signaling is the same as that
                  used for Feature Group D Switched Access. Common Channel
                  Signaling Service, as described in this Agreement, must be
                  ordered by Pac-West when SS7 out-of-band signaling is
                  requested on local trunks.

                  17.5.2.2 Clear Channel Capability

                  Clear channel capability permits 24 DS-0-64 kbit/s services or
                  1.536 Mbit/s of information on the 1.544 Mbit/s line rate.
                  Clear channel capability is available for local trunks
                  equipped with SS7 out-of-band signaling. Clear channel
                  capability is only available on trunks to U S WEST's access
                  tandem switch or U S WEST's end office switches (where
                  available). Clear channel capability must be requested on the
                  order for the new local trunks. The provisioning of the local
                  trunks equipped with clear channel capability is the same as
                  that used for Feature Group D Switched Access Service. U S
                  WEST will provide Pac-West with a listing of U S WEST end
                  offices, local tandems and access tandems equipped with clear
                  channel capability.

                  (Clear channel capability is not available on trunks to U S
                  WEST's local tandem switches or end offices where it is
                  currently not deployed. Pac-West agrees to use the Bona Fide
                  Request process to request clear channel capability for such
                  additional switches. Prices for such additional clear channel
                  capability, if any, will be established through the BFR
                  process).

17.6     Measuring Local Interconnection Minutes

         17.6.1   Measurement of terminating Local Interconnection minutes, as
                  calculated per Attachment 5, begins when the terminating local
                  entry switch receives answer supervision from the called end
                  user's end office indicating the called end user has answered.
                  The measurement of terminating call usage over local trunks
                  ends when the terminating local entry switch receives
                  disconnect supervision from either the called end user's end
                  office, indicating the called end user has disconnected, or
                  Pac-West's Point of Interconnection, whichever is recognized
                  first by the entry switch.

                                       15
<PAGE>

         17-6.2   U S WEST and Pac-West are required to provide each other the
                  proper call information (e.g., originated call party number
                  and destination call party number, etc.) to enable each Party
                  to issue bills in a complete and timely fashion.

17.7     Testing

         17.7.1 Acceptance Testing

                At the time of installation of a local trunk group, and at no
                additional charge, the Parties will cooperatively test the same
                parameters tested for terminating Feature Group D Switched
                Access Service.

         17.7.2 Testing Capabilities

                17.7.2.1   Terminating Local Interconnection trunk testing is
                           provided where equipment is available, with the
                           following test lines: seven-digit access to balance
                           (100 type), milliwatt (102 type), nonsynchronous or
                           synchronous, automatic transmission measuring (105
                           type), data transmission (107 type), loop-around,
                           short circuit, open circuit, and non-inverting
                           digital loopback (108 type).

                17.7.2.2   In addition to Local Interconnection trunk acceptance
                           testing, other tests are available (e.g., additional
                           cooperative acceptance testing, automatic scheduled
                           testing, cooperative scheduled testing, manual
                           scheduled testing, and non-scheduled testing) at the
                           applicable tariff rates.

17.10.   Mileage Measurement

         Where required, the mileage measurement for Local Interconnection
         facilities and trunks is determined in the same manner as the mileage
         measurement for Feature Group D Switched Access Service.

                                       16
<PAGE>

                                                                  Attachment 5

                               TABLE OF CONTENTS

                                  ATTACHMENT 5

                         BUSINESS PROCESS REQUIREMENTS

 1. General Business Requirements ......................................1
 1.1 Procedures ........................................................1
 1.2 Service Offerings .................................................2
 2. Pre-Ordering .......................................................3
 2.1 General Business Requirements .....................................3
 2.2 Service Order Process Requirements ................................6
 2.3 Systems Interfaces and Information Exchanges ......................7
 2.4 Pre-ordering Functions ............................................8
 3. Ordering and Provisioning ..........................................9
 3.1 General Business Requirements .....................................9
 3.2 Service Order Process Requirements ................................11
 3.3 Systems Interfaces and Information Exchanges ......................20
 3.4 Standards .........................................................23
 3.5 Performance Measurements and Reporting ............................24
 4. Connectivity Billing and Recording .................................24
 4.1 Procedures ........................................................24
 4.2 Information Exchange and Interfaces ...............................30
 4.3 Standards .........................................................33
 5. Provision Of Customer Usage Data ...................................35
 6.1 Procedures ........................................................35
 5.2 Information Exchange and Interfaces ...............................41
<PAGE>

 5.3 Standards .........................................................45
 5.4 Standards for Transmitting and Recording Usage Data ...............46
 5.5 Reporting .........................................................46
 6. Maintenance ........................................................46
 6.1 Interim Maintenance and Repair Processes ..........................46
 6.2 General Requirements ..............................................48
 6.3 Systems Interfaces and Information Exchanges ......................52
 6.4 Standards .........................................................54
 6.5 Performance Measurements and Reporting ............................55
 7. Miscellaneous Services and Functions ...............................55
 7.1 [intentionally left blank for numbering consistency] ..............55
 7.2 [intentionally left blank for numbering consistency] ..............55
 7.3 Performance Measurements and Reporting ............................55

                                       2
<PAGE>

1.       General Business Requirements

         1.1 Procedures

              1.1.1   U S WEST Contact with Subscribers

                      1.1.1.1  Pac-West at all times shall be the primary
                               contact and account control for all interactions
                               with its subscribers, except as specified by
                               Pac-West. Pac-West subscribers include active
                               Customers as well as those for whom service
                               orders are pending.

                      1.1.1.2  U S WEST shall ensure that any U S WEST personnel
                               who may receive customer inquiries, or otherwise
                               have opportunity for subscriber contact: (a)
                               provide appropriate referrals and telephone
                               numbers to subscribers who inquire about Pac-West
                               services or products; (b) do not in any way
                               disparage Pac-West or its products or services
                               during such inquiry or subscriber contact; and
                               (c) do not provide information about U S WEST
                               products or services during that same inquiry or
                               subscriber contact.

                      1.1.1.3  Pac-West shall ensure that any Pac-West personnel
                               who may receive customer inquiries, or otherwise
                               have opportunity for subscriber contact: (a)
                               provide appropriate referrals and telephone
                               numbers to subscribers who inquire about US WEST
                               services or products; (b) do not in any way
                               disparage U S WEST or its products or services
                               during such inquiry or subscriber contact; and
                               (c) do not provide information about Pac-West
                               products or services during that same inquiry or
                               subscriber contact

                      1.1.1.4  U S WEST shall not use Pac-West's request for
                               subscriber information, order submission or any
                               other aspect of Pac-West's processes or services
                               to aid U S WEST's marketing or sales efforts.

              1.1.2   Expedite, Escalation and Disaster Procedures

                      1.1.2.1  No later than sixty (60) days after the Effective
                               Date of this Agreement, U S WEST and Pac-West
                               shall develop mutually acceptable escalation and
                               expedite procedures which may be invoked at any
                               point in the Service Ordering, Provisioning,
                               Maintenance and Subscriber Usage Data transfer
                               processes to facilitate rapid and timely
                               resolution of disputes. Within the said sixty
                               (60) day period, U S WEST and Pac-West will
                               establish intercompany contact lists for purposes
                               of handling subscriber and other matters which
                               require attention/resolution outside of normal
                               business procedures. To the extent possible, U S
                               WEST shall notify Pac-West of any changes to its
                               escalation contact list at least one (1) week
                               before such changes are effective.

                      1.1.2.2  No later than sixty (60) days after the Effective
                               Date of this Agreement, U S WEST and Pac-West
                               shall jointly establish contingency and disaster
                               recovery plans for those cases in which normal
                               service ordering, provisioning, maintenance,
                               billing and other procedures for U S WEST's
                               unbundled Network Elements, features, functions
                               and Resale Services are inoperable.

                                       1
<PAGE>

              1.1.3   Operational and Technological Changes

                      1.1.3.1  U S WEST shall notify Pac-West of any material
                               operational or technological (e.g., network,
                               systems interfaces) changes related to any
                               services, Interconnection methods, or Network
                               Elements purchased by Pac-West. At the time U S
                               WEST decides to make such a change, U S WEST will
                               notify Pac-West in sufficient time to allow
                               Pac-West to make necessary adjustments to
                               accommodate the change, but in no case with less
                               than thirty (30) days' notice, unless otherwise
                               agreed to by the Parties. Objections to the
                               proposed change must be given in writing to U S
                               WEST in a reasonable time. For the purposes of
                               this Section, material changes shall be defined
                               as those changes which will likely impact current
                               interactions between Pac-West (or its customers)
                               and U S WEST.

                      1.1.3.2  U S WEST agrees to notify Pac-West whenever an
                               Pac-West subscriber who is provided local service
                               through Services for Resale, INP/NP, or unbundled
                               Network Elements changes Pac-West PIC status.

              1.1.4   Customer of Record

                      1.1.4.1  Providing Pac-West has obtained proper customer
                               authorization, U S WEST shall recognize Pac-West
                               as the Customer of Record for all Network
                               Elements or Services for Resale ordered by
                               Pac-West and shall send all notices, invoices,
                               and information which pertain to such ordered
                               services directly to Pac-West. Pac-West will
                               provide U S WEST with addresses to which U S WEST
                               shall send all such notices, invoices, and
                               information.

              1.1.5   Work Center Interface Procedures

                      1.1.5.1  U S WEST and Pac-West shall, within ninety (90)
                               days of the Effective Date of this Agreement,
                               develop and implement work center interface
                               procedures for each function/ business process
                               necessary for fulfilling the terms of this
                               Agreement.

1.2 Service Offerings

              1.2.1    Changes in Retail Service Offerings

                       1.2.1.1 Pursuant to Section 23.2 of Part A of this
                               Agreement, U S WEST shall provide summaries to
                               Pac-West describing the proposed change(s) of
                               services which are available for resale pursuant
                               to this Agreement.

                      1.2.1.2  [intentionally left blank for numbering
                               consistency]

                      1.2.1.3  U S WEST shall provide Pac-West with access to
                               new services, features, and functions concurrent
                               with U S WEST's notice to Pac-West of such
                               changes, so that Pac-West may evaluate these
                               services.

                                       2
<PAGE>

              1.2.2   Essential Services

                      1.2.2.1  U S WEST shall designate trunks or lines as an
                               Essential Service Line (ESL) or
                               Telecommunications Service Priority (TSP),
                               whichever is applicable, upon Pac-West's request,
                               based on industry standards.

              1.2.3   Blocking Services

                      1.2.3.1  Upon request from Pac-West, U S WEST shall
                               provide blocking in accordance with U S WEST
                               standard intervals for 700, 900, and 976
                               services, or other services of similar type as
                               may now exist or may be developed in the future
                               according to industry standards, and shall
                               provide Billed Number Screening ("BNS"),
                               including required LIDB updates, or equivalent
                               service for blocking completion of bill-to-third
                               party and collect calls, on a line, trunk, or
                               individual service basis.

              1.2.4 Training Support

                      1.2.4.1  U S WEST will train its employees who may
                               communicate with Pac-West subscribers to treat
                               Pac-West in a nondiscriminatory manner. U S WEST
                               will solicit and may take into account input from
                               Pac-West in the development of such training and
                               will permit Pac-West to review, but not approve,
                               such training. Such training will comply with the
                               branding requirements of this Agreement.

                      1.2.4.2  U S WEST or its agent shall train Pac-West
                               employees on U S WEST's systems and processes
                               necessary to assure the accuracy of required
                               information exchange between Pac-West.
                               Information/materials provided to Pac-West should
                               include, at a minimum, operational and procedural
                               information, and U S WEST-specific system
                               access/interface instruction for performing
                               similar functions.

              1.2.5   Carrier Identification Codes

                      U S WEST shall provide to Pac-West the active Carder
                      Identification Codes (CIC) for both Dial 1 and toll free
                      (e.g., 800, 888) services for each of its access tandems
                      pursuant to industry guidelines.

2.       Pre-Ordering

         2.1      General Business Requirements

              2.1.1   Street Address Guide (SAG)

                      Within sixty (60) days after the Effective Date of this
                      Agreement, U S WEST shall provide to Pac-West the SAG
                      data, in an electronic format, when available, or
                      otherwise as mutually agreed. All changes to the SAG shall
                      be provided to Pac-West on a weekly basis.

                                       3
<PAGE>

              2.1.2   CLASS and Custom Features

                      2.1.2.1  Pac-West may order the entire set of CLASS and
                               Custom features and functions, or a subset of any
                               one or any combination of such features. In
                               addition, U S WEST shall provide Pac-West with a
                               list of features and functions available on an
                               end office by end office basis.

              2.1.3    Customer Payment History

                       2.1.3.1  Pac-West and U S WEST agree to make available to
                                a mutually agreed upon third-party credit
                                reporting agency, on a timely basis, such of the
                                following Customer payment history information
                                available for each person or entity that applies
                                for local service or intraLATA toll
                                Telecommunications Service(s) from either Party.

                                2.1.3.1.1    Applicants name;
                                2.1.3.1.2    Applicant' s address;
                                2.1.3.1.3    Applicant's previous phone number,
                                             if any;
                                2.1.3.1.4    Amount, if any, of unpaid balance
                                             in applicant's name;
                                2.1.3.1.5    Whether applicant is delinquent
                                             on payments;
                                2.1.3.1.6    Length of service with prior local
                                             or intraLATA toll provider,
                                2.1.3.1.7    Whether applicant had local or
                                             intraLATA toll service terminated
                                             or suspended within the last six
                                             (6) months with an explanation of
                                             the reason therefor, and,
                                2.1.3.1.8    Whether applicant was required by
                                             prior local or intraLATA toll
                                             provider to pay a deposit or
                                             provide another form of security,
                                             including the amount of each.

                       2.1.3.2  Such information shall be provided on the
                                condition that the credit reporting agency only
                                make such information available to the carrier
                                to which the person or entity in question has
                                applied for Telecommunication Service(s).

            2.1.4      Number Administration/Number Reservations

                       2.1.4.1  Until Number Administration functions are
                                assumed by a neutral third party in accordance
                                with FCC rules and regulations, U S WEST shall
                                assign NXXs to Pac-West on a non-discriminatory
                                and equivalent basis following NANP guidelines.
                                In addition, U S WEST shall provide testing and
                                loading of Pac-West's NXX on the same basis as U
                                S WEST provides itself or its Affiliates.
                                Further, in U S WEST's role as number
                                administrator, it shall provide Pac-West with
                                access to abbreviated dialing codes, access
                                arrangements for 555 line numbers, and the
                                ability to obtain telephone numbers, including
                                vanity numbers, while a customer is on the phone
                                with Pac-West. U S WEST shall provide the same
                                range of number choices to Pac-West, including
                                choice of exchange number, as U S WEST provides
                                its own customers. Reservation and aging of
                                numbers shall remain U S WEST's responsibility.

                                       4
<PAGE>

                      2.1.4.2  Pac-West may reserve blocks of U S WEST telephone
                               numbers in accordance with U S WEST's tariffs, or
                               in the same manner U S WEST reserves telephone
                               numbers for its own use.

                      2.1.4.3  Where Pac-West has obtained its own NXX, but has
                               purchased U S WEST Services for Resale or Network
                               Elements, U S WEST agrees to recognize the
                               Pac-West NXX in U S WEST's switch according to
                               the local calling area defined by Pac-West and
                               approved by the Commission.

                      2.1.4.4  For resale and the unbundled switching element, U
                               S WEST shall accept Pac-West orders for vanity
                               numbers and blocks of numbers for use with
                               complex services including, but not limited to,
                               DID, CENTREX, and hunting arrangements, as
                               requested by Pac-West on a non-discriminatory,
                               equivalent basis following NANP guidelines.

                      2.1.4.5  For simple services, U S WEST shall provide
                               real-time electronic interfaces to Pac-West to
                               obtain telephone number confirmation while the
                               customer is on the line. When real time
                               electronic interfaces are not available for
                               simple services number reservations, U S WEST
                               shall provide alternative means for confirmation
                               of the number reservation while the customer is
                               on the line. For number reservations associated
                               with complex services, U S WEST shall provide
                               confirmation of the number reservation within
                               forty-eight (48) hours of Pac-West's request or
                               within such time as U S WEST may provide to
                               itself or Affiliates, whichever is less.

                      2.1.4.6  Number Resources Arrangements

                               2.1.4.6.1 Nothing in this Agreement shall be
                               construed in any manner to limit or otherwise
                               adversely impact either Party's right to the
                               request and assignment of any NANP number
                               resources including, but not limited to, central
                               office (NXX) codes pursuant to the Central Office
                               Code Assignment Guidelines (last published by the
                               Industry Numbering Committee ("INC") as INC
                               95-0407-008, Revision 4/19/96, formerly ICCF
                               93-0729-010).

                               2.1.4.6.2 To the extent U S WEST serves as
                               Central Office Code Administrator for a given
                               region, U S WEST will support all Pac-West
                               requests related to central office code (NXX)
                               administration and assignments in the manner
                               required and consistent with the Central Office
                               Code Assignment Guidelines.

                               2.1.4.6.3 [intentionally left blank for numbering
                               consistency]

                               2.1.4.6.4 The Parties will comply with (NXX)
                               administration requirements as prescribed by the
                               FCC, the Commission, and accepted industry
                               guidelines.

                               2.1.4.6.5 It shall be the responsibility of each
                               Party to program and update its own switches and
                               network systems pursuant to the Local Exchange
                               Routing Guide ("LERG") guidelines to recognize
                               and route traffic to the other Party's assigned
                               NXX codes at all times. Neither Party shall
                               impose any fees or

                                       5
<PAGE>

                               charges whatsoever on the other Party for such
                               activities. The Parties will cooperate to
                               establish procedures to ensure the timely
                               activation of NXX assignments in their respective
                               networks.

                               2.1.4.6.6 Each Party shall be responsible for
                               notifying its customers of any changes in
                               numbering or dialing arrangements to include
                               changes such as the introduction of new NPAs or
                               new NXX codes.

                               2.1.4.6.7 Until an impartial entity is appointed
                               to a~minister telecommunications numbering, U S
                               WEST will assign NXX codes to Pac-West in
                               accordance with national guidelines at no charge
                               and on a nondiscriminatory basis.

                               2.1.4.6.8 Each Party is responsible for
                               administering NXX codes assigned to it. Each
                               Party is responsible for obtaining LERG listings
                               of CLLI codes assigned to its switches. Each
                               Party shall use the LERG published by Bellcore or
                               its successor for obtaining routing information
                               and shall provide all required information to
                               Bellcore for maintaining the LERG in a timely
                               manner.

                      2.1.4.7  U S WEST shall provide provisioning support
                               outside of scheduled work hours on a
                               nondiscriminatory exception basis as requested by
                               Pac-West. Such support may be subject to a
                               minimum labor charge.

                      2.1.4.8  Service Assurance Warranties and Incentives: U S
                               WEST shall provide to Pac-West service assurance
                               warranties and incentives as U S WEST provides
                               such service warranties and incentives to its own
                               end users or any other Person except as otherwise
                               provided by the Commission.

                      2.1.4.9  Availability of Network Capacity: Consistent with
                               Pac-West's forecasts, U S WEST shall deploy and
                               keep deployed network facilities for Pac-West
                               services in a non-discriminatory manner and in
                               the same manner as U S WEST makes such facilities
                               available to itself for its services.

                      2.1.4.10 Workcenter Interface Methods and Procedures: U S
                               WEST and Pac-West shall finalize interface
                               methods and procedures between their respective
                               work centers detailing systems and processes for
                               ordering and provisioning.

                               Such methods and procedures shall be completed
                               within one hundred twenty (120) days after a
                               written request by either Party. The lack of
                               workcenter interface methods and procedures shall
                               not inhibit the provision of services under this
                               Agreement.

     2.2 Service Order Process Requirements

          2.2.1    [Intentionally left blank for numbering consistency]

          2.2.2    Specific Unbundling Requirements

                                       6
<PAGE>

                      2.2.2.1  When ordering a Combination, Pac-West shall have
                               the option of ordering all features, functions
                               and capabilities of each Network Element.

                      2.2.2.2  When Pac-West orders Network Elements, U S WEST
                               shall provision all features, functions, and
                               capabilities appropriate to the Network Elements
                               which may include, but are not limited to:

                               2.2.2.2.1 the basic switching function of
                               connecting lines to lines, lines to trunks,
                               trunks to lines, and trunks to trunks, as well as
                               the same basic capabilities made available to U S
                               WEST's Customers, such as telephone number, white
                               page listing, and dial tone; and

                               2.2.2.2.2 all other features the switch has
                               activated, including, but not limited to, custom
                               calling, custom local area signaling service
                               features and Centrex, as well as any technically
                               feasible customized routing functions provided by
                               the switch.

     2.3 Systems Interfaces and Information Exchanges

              2.3.1   General Requirements

                      [Intentionally left blank for numbering consistency]

              2.3.2   Pre-Ordering and Provisioning for Resale Services and
                      Unbundled Network Elements

                      2.3.2.1  U S WEST shall provide to Pac-West a list of all
                               intraLATA and interLATA carriers available for
                               Customer selection on a central office level.

                      2.3.2.2  [Intentionally left blank for numbering
                               consistency].

                      2.3.2.3  U S WEST shall provide Pac-West with access to
                               Customer Profile Information ("CPI") without
                               requiring Pac-West to produce a signed Letter of
                               Authorization ("LOA") subject to proof of
                               authorization requirements described elsewhere in
                               this Agreement, based on Pac-West's blanket
                               representation that the Customer has authorized
                               Pac-West to obtain such CPI.

                               2.3.2.3.1 CPI shall be in a mutually agreed to
                               format at the line and/or trunk level. U S WEST
                               shall provide to Pac-West a real-time, electronic
                               interface to U S WEST Customer information
                               systems which will allow Pac-West to obtain the
                               Customer profile, which may include, but not be
                               limited to, Customer name, service addresses,
                               billed telephone number(s), and identification of
                               features and services provided by U S WEST on the
                               Customer accounts, and to obtain information on
                               all features and services available in the end
                               office where Customer's services are currently
                               provisioned. The preceding information may not
                               include services deemed not to be
                               Telecommunications Services by the Commission.

                                        2.3.2.3.1.1 Until access is available
                                        via a real-time, electronic interface
                                        for CPI, U S WEST agrees that Pac-West
                                        can obtain CPI in

                                       7
<PAGE>

                                   an interim mutually agreed to manner and in
                                   accordance with Section 3.2 of this
                                   Attachment to facilitate the service order
                                   process.

                  2.3.2.5  U S WEST shall provide to Pac-West, upon request, a
                           list of all current features and functions
                           technically available from each switch, by switch
                           CILLI. Planned services shall be provided to Pac-West
                           at least thirty (30) days in advance of their
                           availability.

                  2.3-2.6  [Intentionally left blank for numbering consistency)

                  2.3.2.7  Pending or Held Orders: U S WEST shall provide, when
                           available, the Pac-West information regarding a
                           subscriber's previous pending or held orders. If the
                           subscriber has a pending or held order, the status of
                           the order shall not be negatively impacted as a
                           result of the subscriber changing local service
                           providers (i.e., due date for pending service changed
                           to later date).

                  2.3.2.8  Special Construction: When U S WEST determines that
                           special construction is required, U S WEST shall
                           notify Pac-West on a timely basis of special
                           construction requirements and charges, and obtain
                           Pac-West authorization before beginning such
                           construction.

         2.3.3    Pre-Ordering and Provisioning for Unbundling

                  2.3.3.1  U S WEST shall provide to Pac-West, upon reasonable
                           request, sufficient engineering design and layout
                           information for Network Elements for specific
                           applications.

                  2.3.3.2  U S WEST shall provide to Pac-West, upon request,
                           advance information of the details and requirements
                           for planning and implementing NPA splits in
                           accordance with NANP Guidelines.

                  2.3.3.3  U S WEST shall make engineering support available to
                           Pac-West as is normal and customary in the provision
                           of Telecommunications Services, Network Elements,
                           Combinations or Ancillary Functions as described in
                           this Agreement. Pac-West may request additional
                           engineering support.

2.4 Pre-ordering Functions(1)

        "Pre-Ordering" and "Ordering" encompass the preliminary set of
        activities whereby a service representative interacts with the customer
        in order to obtain the information required to write a service order and
        consist of the following functions: verify an address, check service
        availability, reserve a telephone number, check for appointment
        availability, reserve an appointment and return customer service
        information. These functions are described as follows:

----------

1        MCIm Order, pp. 15-16 at Issue 24 and AT&T Order at Issue 41.

                                       8
<PAGE>

             2.4.1    Address Verification - Provides Pac-West with the ability
                      to query for and receive the customer service location,
                      serving central office, and facility indicators. The
                      facilities indicator will indicate the availability of
                      facilities for one (1) access line at the address, if the
                      cable pair is available or working. If the cable pair is
                      working, an indication of a pending disconnect order and
                      the due date will be provided. This function does not
                      reserve cable pairs.

             2.4.2    Telephone Number Reservation - Provides Pac-West with the
                      capability to identify if one or more telephone numbers
                      are available and reserve them if available. This includes
                      the ability to reserve one or more specific numbers
                      (vanity numbers), a block of sequential or random block of
                      numbers by serving central office and/or NXX. If a work
                      order is not received within a negotiated amount of time,
                      the reservation will automatically expire.

             2.4.3    Appointment Availability and Reservation - Provides
                      Pac-West with the capability to determine the next
                      available due date, the availability of a specific date,
                      an indication if the date is available or a selection of
                      the next available date, any closed dates beyond that
                      date, and reservation of an available appointment.

             2.4.4    Service Availability - Allows Pac-West to determine the
                      availability of services and facilities to a specific
                      end-users' location(s). This capability indicates that the
                      service is available, that tariff rates apply, the amounts
                      of any additional recurring and non-recurring costs, and
                      the interval to be used when ordering the service.

             2.4.5    Customer Service Information Request - Gives Pac-West the
                      ability to request a listing of existing services,
                      features, directory listing and equipment for a customer
                      account.

             2.4.6    Circuit Identification Request - Provides Pac-West with
                      the capability to identify and obtain circuit
                      identifications. If a work order for a Circuit
                      Identification Request is not received within a negotiated
                      amount of time, the request will automatically expire.

3.       Ordering and Provisioning

     3.1 General Business Requirements

              3.1.1   Ordering and Provisioning Parity

                      U S WEST shall provide Pac-West with the same level of
                      ordering and provisioning support as U S WEST provides
                      itself in accordance with standards and performance
                      measurements that U S WEST uses and/or which are required
                      by law, regulatory agency, or by U S WEST's own internal
                      procedures, whichever are the most rigorous. These
                      standards shall apply to the quality of the technology,
                      equipment, facilities, processes, and techniques
                      (including, but not limited to, such new architecture,
                      equipment, facilities, and interfaces as U S WEST may
                      deploy) that U S WEST provides to Pac-West under this
                      Agreement.

                                       9
<PAGE>

               3.1.2    Interconnection Service Center (ISC)/Single Point of
                        Contact

                        3.1.2.1  U S WEST shall provide a Systems Interface Help
                                 Desk or equivalent which shall serve for all
                                 activities involved in the electronic interface
                                 for ordering and provisioning of U S WEST's
                                 unbundled Network Elements, features,
                                 functions, and Resale Services. The Systems
                                 Interface Help Desk or equivalent shall be
                                 available twenty-four (24) hours a day, seven
                                 (7) days a week.

                        3.1.2.2  U S WEST shall provide a Single Point of
                                 Contact ("SPOC") and shall provide to Pac-West
                                 toll-free nationwide telephone numbers
                                 (available during U S WEST's scheduled work
                                 hours) answered by competent, knowledgeable
                                 personnel, trained to answer questions and
                                 resolve problems in connection with the
                                 ordering and provisioning of unbundled Network
                                 Elements, features, functions, capabilities,
                                 and Resale Services. U S WEST will provide
                                 sufficient resources to provide equivalent, or
                                 as otherwise agreed to by the Parties, service
                                 to Pac-West.

                        3.1.2.3  In addition to the electronic interfaces
                                 provided for elsewhere in this Agreement, U S
                                 WEST shall provide, as requested by Pac-West
                                 through the SPOC, provisioning and dispatch in
                                 the form of coordinated scheduling, status, and
                                 dispatch capabilities equivalent to that which
                                 U S WEST provides itself or as otherwise agreed
                                 to by the Parties.

               3.1.3 Carrier Selection

                         3.1.3.1 For Services for Resale or unbundled Network
                                 Elements, U S WEST shall provide to Pac-West,
                                 on a date to be mutually agreed to by Pac-West
                                 and U S WEST, the capability to order local
                                 service, intraLATA and interLATA toll services
                                 by entering Pac-West subscribers choice of
                                 carrier on a single order. U S WEST will offer
                                 other carrier selection choices as they become
                                 available. U S WEST shall provide Pac-West with
                                 the capability to order separate interLATA and
                                 intraLATA carriers on a line or trunk basis
                                 where 1+ presubscription is available.

                         3.1.3.2 Where intraLATA 1+ presubscription is not
                                 available, or if the subscriber does not select
                                 an intraLATA toll carrier, U S WEST agrees to
                                 provide intraLATA toll services for resale to
                                 Pac-West and to recognize the end user as the
                                 customer of Pac-West for intraLATA toll.
                                 Pac-West shall designate the default carrier
                                 for all other toll calls if the subscriber does
                                 not select a carrier. In all cases, U S WEST
                                 will route toll calls to the appropriate
                                 carrier as designated by Pac-West.

               3.1.4    Notification to Long Distance Carrier

                        3.1.4.1  U S WEST will not accept PIC change requests
                                 through the CARE process for Pac-West local
                                 service customers. Pac-West's long distance
                                 operations may obtain such CARE transactions
                                 for Pac-West long distance customers from the
                                 customer's local service provider. U S WEST
                                 agrees to notify IXCs using OBF approved CARE
                                 transactions, whenever an IXC Customer who is
                                 provided

                                       10
<PAGE>

                       local service through Services for Resale, INP/NP, or
                       unbundled Network Elements changes PIC status.

               3.1.4.2 U S WEST shall implement new Transaction Code Status
                       Indicators (TCSIs) 2033, 2233, 3147, and 3148. The new
                       local service provider identification ("LSPID") will be
                       included on these transactions if the new local service
                       provider agrees U S WEST should provide the information
                       to a long distance provider as defined by the OBF in
                       support of Local Resale.

               3.1.4.3 U S WEST shall implement TCSIs used in conjunction with
                       the new local service provider ("LSP") identification
                       code for handling account maintenance, customer service,
                       and trouble administration issues. These TCSIs include
                       4001/02/05, 4201-4205, 4301, 2033, 2233, 3147, 3148,
                       3149, and others as the OBF may define.

                           3.1.4.3.1 In addition, U S WEST shall implement
                           TCSIs, when available, used in conjunction with the
                           new Ported Telephone Number field to link "shadow"
                           and ported telephone numbers in support of Interim
                           Number Portability. These TCSIs include 2231, 31.50,
                           3151, and others as the OBF may define.

         3.1.5   Ordering Interconnection

                 The Parties agree to utilize the OBF-ASR process for ordering
                 interconnection trunks, which is the same process used to order
                 Access Services. When the ordering Party requests facilities,
                 routing, or optional features different than those determined
                 to be available, the Parties will work cooperatively in
                 determining an acceptable configuration based on available
                 facilities, equipment and routing plans.

3.2 Service Order Process Requirements

         3.2.1   OBF Compliance

                  3.2.1.1  U S WEST and Pac-West shall generally follow the
                           OBF-developed ordering and provisioning process
                           guidelines. These processes include, but are not
                           limited to, pre-order service inquiry, pre-order
                           service inquiry response, firm order,
                           acknowledgment/rejection, firm order confirmation,
                           delay notification, and completion notification. U S
                           WEST agrees to work cooperatively to generally comply
                           with future OBF developed guidelines.

         3.2.2    Service Migrations and New Customer Additions

                  3.2.2.1 For Resale Services, U S WEST shall not require a
                          disconnect order from a Customer, another local
                          service provider, or any other entity, to process an
                          Pac-West order to establish Pac-West Local Service
                          and/or migrate a Customer to Pac-West Local Service.

                  3.2.2.2 For Resale Services, U S WEST shall not disconnect any
                          Customer service or existing features available under
                          this Agreement at any time during the

                                       11
<PAGE>

               migration of that Customer to Pac-West service without Pac-West's
               prior agreement.

     3.2.2.3   For services provided through unbundled Network Elements, U S
               WEST shall recognize Pac-West as an agent for the Customer in
               coordinating the disconnection of services provided by another
               CLEC or U S WEST.

     3.2.2.4   Unless otherwise directed by Pac-West, when Pac-West orders
               Resale Services or Network Elements, all trunk or telephone
               numbers currently associated with existing services shall be
               retained without loss of feature capability and without loss of
               associated ancillary services including, but not limited to,
               Directory Assistance and 911/E911 capability for those services
               or features which U S WEST controls and which are available under
               this Agreement.

     3.2.2.5   For Customer conversions requiring coordinated cut-over
               activities, U S WEST and Pac-West will agree on a scheduled
               conversion time(s), which will be a designated two-hour time
               period within a designated date. Unless expedited, U S WEST and
               Pac-West shall schedule the cut-over window at least forty-eight
               (48) hours in advance, and as part of the scheduling, U S WEST
               shall estimate for Pac-West the duration of any service
               interruption that the cut-over might cause .2 The cut-over time
               will be defined as a thirty (30) minute window within which both
               the Pac-West and U S WEST personnel will make telephone contact
               to complete the cut-over.

               3.2.2.5.1 U S WEST will coordinate activities of all U S WEST
               work groups involved with the conversion. This coordination will
               include, but not be limited to, work centers charged with manual
               cross-connects, electronic cross-connect mapping, and switch
               translations (including, but not limited to, implementation of
               Interim Number Portability translations).

               3.2.2.5.2 As soon as possible, but in no event later than one (1)
               hour after completion, U S WEST will notify Pac-West when
               coordinated cut-over is complete.

               3.2.2.5.3 End user service interruption shall not exceed twenty
               (20) minutes during any cut-over. The average interruption caused
               by the cut-over of Pac-West Customers shall not exceed ten (10)
               minutes. If any service interruption is to exceed twenty (20)
               minutes, however, U S WEST will immediately notify Pac-West of
               such delay.

               3.2.2.5.4 Within the appointed thirty (30) minute cut-over time,
               the U S WEST personnel will call the Pac-West personnel
               designated to perform cross-connection work and when the U S WEST
               person is reached in that interval such work will be promptly
               performed. If the Pac-West person is not ready within the
               appointed' interval, and if Pac-West had not called to

                                       12
<PAGE>

            reschedule the work at least two (2) hours prior to the start of the
            interval, U S WEST and Pac-West will reschedule the work order and
            Pac-West will pay the non-recurring installation charge for the
            unbundled loops scheduled for the missed appointment. In addition,
            non-recurring installation charges for the rescheduled appointment
            will apply. If the U S WEST person is not available or not ready at
            any time during the thirty (30) minute interval, Pac-West and U S
            WEST will reschedule and U S WEST will waive the non-recurring
            charge for the unbundled loops scheduled for that interval. If
            unusual or unexpected circumstances prolong or extend the time
            required to accomplish the coordinated cut-over, the Party
            responsible for such circumstances is responsible for the reasonable
            labor charges of the other Party. Delays caused by the customer are
            the responsibility of Pac-West. In addition, if Pac-West has ordered
            INP as a part of the unbundled loop installation, U S WEST will
            coordinate implementation of INP with the unbundled loop
            installation.

 3.2.2.6    Service Order U S WEST shall provide Pac-West the capability to
            issue a service order for unbundled Network Elements, Combinations,
            and Resale Services.

 3.2.2.7    PLOC Changes: U S WEST shall provide Pac-West the capability to
            transfer a customer with no feature changes to Pac-West through a
            streamlined PLOC (Primary Local Carrier) transfer process.

 3.2.2.8    Status: U S WEST shall provide the Pac-West status on a service
            order when the status of the order changes.

 3.2.2.9    Modifies: U S WEST shall provide Pac-West the capability to modify
            the service order any time after it has been issued; however, U S
            WEST may require the issuance of a supplemental or change order.

 3.2.2.10   Cancel: U S WEST shall provide Pac-West the capability to cancel the
            service order any time after it has been issued.

 3.2.2.11   Coordinated Service Orders: U S WEST shall provide Pac-West the
            capability to relate coordinated services orders, and identify those
            service orders that require coordination with Pac-West, or the
            subscriber, or the subscriber's vendor. When so identified, U S WEST
            will follow any specific instructions indicated on the service order
            so that the subscriber's service is not negatively affected by the
            service turn-up activity.

 3.2.2.12   Expedite Process: U S WEST and Pac-West shall mutually develop
            expedite procedures to be followed when Pac-West determines an
            expedite is required to meet subscriber service needs.

 3.2.2.13   Expedites: U S WEST shall provide Pac-West the capability to
            expedite a service order. Within two (2) business hours after a
            request from Pac-West for an expedited order, U S WEST shall notify
            Pac-West of U S WEST's confirmation to complete, or not complete,
            the order within the expedited interval.

                                       13
<PAGE>

    3.2.3    Intercept Treatment and Transfer of Service Announcements

             3.2.3.1    U S WEST shall  provide  unbranded  intercept  treatment
                        and transfer of service announcements  to Pac-West
                        Customers.  U S WEST shall provide such treatment and
                        transfer of service  announcement for all service
                        disconnects,  suspensions,  or transfers,  in the same
                        manner as that  which U S WEST  provides  to its own end
                        users. U S WEST's current standard time periods for
                        providing such  announcements is three (3) months for
                        residential  service and twelve (12) months for business
                        service.  Pac-West  may  request  extensions  at parity
                        with that which U S WEST provides to its end-users.

             3.2.3.2    Pursuant to this Agreement, Pac-West shall provide
                        unbranded intercept treatment and transfer of service
                        announcements to U S WEST Customers. Pac-West shall
                        provide such treatment and transfer of service
                        announcement for all service disconnects, suspensions,
                        or transfers, at parity with that which Pac-West
                        provides its own end users. Pac-West standard time
                        periods for providing such announcements is three (3)
                        months for residential service and twelve (12) months
                        for business service. U S WEST may request extensions at
                        parity with that which Pac-West provides to its
                        end-users.

    3.2.4    Due Date

             3.2.4.1    U S WEST and Pac-West shall mutually agree on what
                        services and circumstances are subject to the standard
                        interval process to determine the due date or the
                        requested/committed due date process.

             3.2.4.2    For those services and circumstances that U S WEST and
                        Pac-West agree shall be handled by the standard interval
                        process, U S WEST shall supply Pac-West with standard
                        due date intervals on a nondiscriminatory basis to be
                        used by Pac-West personnel to determine service
                        installation dates. Under those circumstances U S WEST
                        shall complete the provisioning within the standard
                        interval.

                        3.2.4.2.1 If Pac-West requests a due date earlier than
                        the standard due date interval, then expedite charges
                        may apply.

             3.2.4.3    For those services and circumstances that U S WEST and
                        Pac-West agree shall be handled by the
                        requested/committed due date process, Pac-West may
                        request a due date on each order. U S WEST will provide
                        an offered due date on a nondiscriminatory basis. If
                        Pac-West accepts the offered due date then such date
                        shall become the committed due date. U S WEST will
                        complete the order on the committed due date unless
                        otherwise authorized by Pac-West.

                        3.2.4.3.1 If Pac-West requires a due date earlier than
                        the U S WEST offered due date and U S WEST agrees to
                        meet the Pac-West required due date, then that required
                        due date becomes the committed due date and expedite
                        charges may apply.

                                       14
<PAGE>

         3.2.4.4       Subsequent to an initial order submission, Pac-West may
                       request a new/revised due date that is earlier than the
                       committed due date. If U S WEST agrees to meet that
                       new/revised due date, then that new/revised due date
                       becomes the committed due date and expedite charges may
                       apply.

         3.2.4.5       Any special or preferred scheduling options available,
                       internally or externally, to U S WEST for ordering and
                       provisioning services shall also be available to
                       Pac-West.

3.2.5    Customer Premises Inspections and Installations

         3.2.5.1       Pac-West shall perform or contract for all needs
                       assessments, including equipment and installation
                       requirements, at the Customer premises.

         3.2.5.2       U S WEST shall provide Pac-West with the ability to
                       schedule dispatches for work under this Agreement.

         3.2.5.3       U S WEST shall provide, at Pac-West's request, extended
                       demarcation beyond the NID using intrabuilding riser and
                       lateral beyond the NID. This provision shall not require
                       U S WEST to provide inside wire.

3.2.6    Firm Order Confirmation (FOC)

         3.2.6.1       U S WEST shall provide to Pac-West, via an electronic
                       interface, a Firm Order Confirmation ("FOC") for each
                       Pac-West order. The FOC shall contain, on a per line
                       and/or trunk basis, an enumeration of Pac-West ordered
                       unbundled Network Elements (and the specific U S WEST
                       naming convention applied to that Network Element or
                       Combination), features, functions, Resale Services,
                       options, physical interconnection, quantity, and U S WEST
                       committed due date for order completion.

         3.2.6.2       For a revised FOC, U S WEST shall provide order detail on
                       a per line or per trunk level basis, as well as the order
                       detail from the prior FOC.

3.2.7 Order Rejections

         3.2.7.1       U S WEST shall reject and return to Pac-West any order
                       that U S WEST cannot provision, due to technical reasons,
                       missing information, or jeopardy conditions in accordance
                       with Performance Measurements as defined herein. When an
                       order is rejected, U S WEST shall, in its rejection
                       notification, specifically describe all of the reasons
                       for which the order was rejected. US WEST shall not
                       reject any orders on account of the requested due date.

         3.2.7.2       On an exception basis, to the extent that errors cannot
                       be corrected pursuant to electronic interface processes,
                       U S WEST agrees to accept verbal order corrections from
                       Pac-West. U S WEST shall timely inform

                                       15
<PAGE>

                      Pac-West by telephone of any minor issues which can be
                      handled over the phone. As required, Pac-West will provide
                      a supplemental order reflecting changes to the original
                      service order.

3.2.8    Service Order Changes

         3.2.8.1       If an installation or other Pac-West-ordered work request
                       requires a change from the original Pac-West service
                       order in any manner, U S WEST shall call Pac-West in
                       advance of performing the installation or other work to
                       obtain authorization. U S WEST shall then provide
                       Pac-West an estimate of additional labor hours and/or
                       materials. After all installation or other work is
                       completed, U S WEST shall notify Pac-West of actual labor
                       hours and/or materials used in accordance with regular
                       service order completion schedules.

                       3.2.8.1.1 If additional work is completed on a service
                       order, as approved by Pac-West, the cost of the
                       additional work must be reported to Pac-West in
                       accordance with regular service order completion
                       schedules.

                       3.2.8.1.2 If a service order is partially completed,
                       notification must identify the work that was done and the
                       work remaining to be completed.

         3.2.8.2       If an Pac-West Customer requests a service change at the
                       time of installation or other work being performed by U S
                       WEST on behalf of Pac West, U S WEST, while at the
                       Customer premises, shall direct the Pac West Customer to
                       contact Pac-West so as to avoid unnecessary delays in
                       service activation should the U S WEST representative
                       leave Customer premises prior to completing the
                       installation.

3.2.9    Jeopardy Situations

         3.2.9.1       To the extent jeopardy information is available, U S WEST
                       shall provide to Pac-West notification of any jeopardy
                       situations prior to the committed due date, missed
                       appointments and any other delay or problem in completing
                       work specified on Pac-West service order as detailed on
                       the FOC, in accordance with the Performance Measurements
                       as defined herein.

3.2.10    Cooperative Testing

          3.2.10.1 Network Testing

                   3.2.10.1.1 To the extent that U S WEST provides testing for
                   services offered to its end users and to the extent U S WEST
                   provides testing for itself, U S WEST shall perform all
                   pre-service testing prior to the completion of the Pac-West
                   order, including testing on local service facilities and
                   switch translations, including, but not limited to,
                   verification of features, functions, and services ordered by
                   Pac-West.

                                       16
<PAGE>

                    3.2.10.1.2 The Parties agree to cooperate in testing that is
                    required to complete service orders.

      3.2.10.2      Systems and Process Testing

                    3.2.10.2.1 Upon Pac-West's request, U S WEST shall cooperate
                    with Pac-West to ensure that all operational interfaces and
                    processes are in place and functioning properly and
                    efficiently. Testing shall simulate actual operational
                    procedures and systems interfaces to the greatest extent
                    possible. Pac-West may request cooperative testing to ensure
                    service performance, reliability, and Customer service
                    ability.

3.2.11 Service Suspensions/Restorations

       3.2.11.1     For services other than non-switched, upon Pac-West's
                    request through a Suspend/Restore Order, U S WEST shall
                    suspend or restore the functionality of any Network Element,
                    feature, function, or Resale Service. U S WEST shall provide
                    restoration priority on a per Network Element or Combination
                    basis in a manner that conforms with Pac-West requested
                    priorities and any applicable regulatory rules and
                    regulations or government requirements.

3.2.12 Disconnects

       3.2.12.1     US WEST shall provide to Pac-West daily information, in a
                    mutually agreed upon format, notifying Pac-West of any
                    services disconnected from Pac-West. This report will
                    itemize a change in local service provider or outward line
                    movement on service order activity.

3.2.13 Order Completion Notification

       3.2.13.1     Upon completion of a service order by US WEST in its
                    system(s), U S WEST shall submit to Pac-West an order
                    completion which details the work performed (including a
                    list of features and functions installed), the date
                    completed, charges associated with the order, and
                    verification of accurate service completion. Notification
                    shall be provided in accordance with mutually agreed upon
                    intervals.

3.2.14 [Intentionally left blank for numbering consistency.]

3.2.15 Specific Unbundling Requirements

       3.2.15.1     Pac-West may order and U S WEST shall provision unbundled
                    Network Elements either individually or in any combination
                    on a single order. Pac-West may order and US WEST shall
                    provide Unbundled Network Elements without restriction as to
                    how those elements may be rebundled.(3)

----------

3    MCIm Order, p. 11 at issue 14 and AT&T Order, p. 13 at Issue 25.

                                       17
<PAGE>

         3.2.15.2     Prior to providing service in a specific geographic area
                      or when Pac-West requires a change of network
                      configuration, Pac-West may elect to place an order with
                      U S WEST requiring U S WEST to prepare Network Elements
                      and switch translations in advance of orders for
                      additional Network Elements from Pac-West.

         3.2.15.3     When Pac-West orders combinations of currently connected
                      Network Elements, U S WEST shall ensure that such Network
                      Elements remain connected and functional without any
                      disconnection or disruption.

         3.2.15.4     Order combinations of contiguous Network Elements shall be
                      available to be ordered (a) on a case-by-case basis for
                      those Network Elements that are Customer-specific; or (b)
                      on a common-use (non-end user specific) basis for those
                      Network Elements that are shared by multiple Customers.

         3.2.15.5      Individual Network Elements shall be identified and
                       ordered by Pac-West so that they can be provisioned
                       together.

         3.2.15.6      U S WEST shall provide technical assistance to Pac-West
                       with respect to unbundled Network Elements pursuant to
                       Section 2.3.3.3 of this Attachment.

         3.2.15.7      Each order for Network Elements will contain
                       administration, bill, contact, and Customer information,
                       as defined by the OBF.

         3.2.15.8     When  ordering  unbundled  switch  ports,  Pac-West  is
                      requested  to  specify  the  desired signaling (e.g., loop
                      start, ground start or loop reverse battery options).

                      3.2.15.8.1 To the extent Pac-West requires an unbundled
                      loop to provide ISDN, HDSL, ADSL, DS1 service or other
                      channel performance options, such requirements will be
                      identified on the order for unbundled loop service.

                      3.2.15.8.2 The actual loop facilities provided may utilize
                      various technologies or combinations of technologies.
                      Basic unbundled loops provide an analog facility to
                      Pac-West.

3.2.16   Interim Interfaces

         3.2.16.1     U S WEST will offer interim interfaces via Interconnect
                      Mediated Access as documented in Document Number T-1
                      2-99-116472-00-02, current as of the Effective Date of
                      this Agreement, or as mutually agreed to by the Parties.

         3.2.16.2     Until the electronic interface described in Section
                      3.2.16.1 is available for the required services, U S WEST
                      agrees that the Interconnect Service Center (ISC) or
                      similar function will accept Pac-West orders. Orders will
                      be transmitted to the ISC via mutually agreed procedures.

                                       18
<PAGE>

         3.2.16.3      Until industry standards are completed and implemented
                       pursuant to Section 3.3.2 of this Attachment, U S WEST
                       and Pac-West agree to use interim interfaces as described
                       in Section 3.2.16.1 above.

3.2.17 Ordering and Maintenance

         3.2.17.1      For the purpose of ordering unbundled Network Elements or
                       Combinations, Pac-West shall provide a blanket letter of
                       authorization to U S WEST indicating that it shall be
                       duly authorized by its customer to process such service
                       orders.

         3.2.17.2      If there is a conflict between an end user (and/or its
                       respective agent) and Pac-West regarding the
                       disconnection or provision of unbundled Network Elements
                       or Combinations, U S WEST will honor the latest dated
                       proof of authorization designating an agent by the end
                       user or its respective agent. Compensation for
                       unauthorized disconnections or transfers shall be in
                       accordance with Section 258 of the Act or by Commission
                       rule.

         3.2.17.3      Pac-West has primary responsibility for its own end user
                       base and will have the responsibility for resolution of
                       any service trouble report(s) from its customers. U S
                       WEST will work cooperatively with Pac-West to resolve
                       trouble reports when the trouble condition has been
                       isolated and found to be within a portion of U S WEST's
                       network. Where available, Pac-West must provide to U S
                       WEST switch-based test results when testing its
                       customer's trouble prior to U S WEST performing any
                       repair functions. The Parties will cooperate in
                       developing mutually acceptable test reports.

         3.2.17.4      In the event of a transfer of the end user's service for
                       unbundled Network Elements from one provider to Pac-West,
                       Pac-West shall issue a request for transfer of service to
                       U S WEST and the provider from whom the service is being
                       transferred. In the event of a transfer of the end users
                       service for unbundled Network Elements from Pac-West to
                       another provider, Pac-West shall submit to U S WEST a
                       disconnect order for such unbundled Network Elements or
                       Combinations to facilitate the cessation of billing by U
                       S WEST. The Parties agree to develop procedures to handle
                       the transfer of an end user service from one provider to
                       another.

         3.2.17.5      [intentionally left blank for numbering consistency.]

         3.2.17.6      When ordering unbundled loops, Pac-West is responsible
                       for obtaining or providing facilities and equipment that
                       are compatible with the loop.

         3.2-17.7      To the extent a U S WEST provided unbundled loop is
                       provisioned without U S WEST provided unbundled
                       switching, Pac-West will have responsibility for testing
                       the unbundled loop. If, at Pac-West's request, U S WEST
                       must dispatch to perform tests on an unbundled loop, and
                       the fault is not in U S WEST facilities, a charge may
                       apply.

                                       19
<PAGE>

                   3.2.17.8     To the extent a U S WEST provided unbundled loop
                                is provisioned without unbundled U S
                                WEST-provided unbundled switching, Pac-West will
                                be responsible for providing the Pac-West switch
                                interface, if applicable, on the U S WEST MDF
                                interface to facilitate plant test.

3.3 Systems Interfaces and Information Exchanges

         3.3.1(4) Interim Requirements for Operational Support Systems In
                  accordance with Section 271 of the Act, U S WEST shall provide
                  Pac-West with interfaces to access U S WEST's databases and
                  associated signaling necessary for the routing and completion
                  of Pac-West traffic. Except where otherwise specified, access
                  to such databases, and the appropriate interfaces, shall be
                  made available to Pac-West via a Bona Fide Request. The costs
                  will be recovered through prices based on TELRIC or other
                  method to be decided upon by the Commission.

                  3.3.1.1      Operational Systems Interfaces - Interface
                               Implementation Timetable 3.3.1.1.1 U S WEST's
                               initial operational systems interfaces deployment
                               on a date to be mutually agreed upon by Pac-West
                               and U S WEST, will support Pre-ordering,
                               Ordering, Provisioning and Repair capabilities
                               for POTS (non-design) services and billing
                               capabilities for most U S WEST product offerings.
                               Subsequent phases of the plan incorporate the
                               capabilities to support designed services for
                               Pre-ordering, Ordering, Provisioning, and
                               Maintenance and Repair. Time frames for delivery
                               of the operational support systems for designed
                               services are estimated to be sometime in the near
                               future.

                               3.3.1.1.2 U S WEST will develop long term
                               mediated access pursuant to the Joint
                               Implementation Agreement.

                               3.3.1.1.3 U S WEST shall abide by the
                               implementation schedule and the representation
                               made within testimony presented in Commission
                               Docket Nos. U-3175-96-479 and E-1051-96-479 in
                               deploying its initial interfaces. U S WEST shall
                               regularly inform Pac-West of its progress in
                               implementing the interfaces, and shall allow
                               Pac-West to test the interfaces and participate
                               in their planning. If U S WEST does not fulfill
                               the terms of its representations, it may be
                               liable to Pac-West for compensation for damages
                               and costs due to U S WEST's failure to comply
                               with its representations.

----------

4    MCIm Order, pp. 15-16 at Issues 24-27 and AT&T Order at Issue 41.

                                       20
<PAGE>

      3.3.1.2 OSS Interface Design

              3.3.1.2.1 U S WEST will develop OSS interfaces using an electronic
              gateway solution consistent with the design prescribed by the FCC
              Interconnection Order at paragraph 527. These gateways will act as
              a mediation or control point between Pac-West and U S WEST's
              Operations Systems. Additionally, these gateways will provide
              security for the interface, protecting the integrity of the U S
              WEST network and its databases, and ensuring that information
              privacy is maintained.

              3.3.1.2.2 Baseline gateway architecture will initially incorporate
              a "World Wide Web"- based, human-readable format for the
              transaction-type interfaces to meet the needs of Pac-West.
              Different batch-type interfaces will be proposed in selected areas
              based on existing standards for their application. US WEST will
              offer a machine-to-machine based protocol interface (e.g., CMIP)
              pursuant to the Joint Implementation Agreement.

                       3.3.1.2.3 U S WEST proposes the use of the existing
                       Electronic Data Interchange (EDI) standard for the
                       transmission of monthly local billing information. EDI is
                       an established standard under the auspices of the
                       American National Standards Institute/Accredited
                       Standards Committee (ANSI/ASC) X12 Committee. A proper
                       subset of this specification has been adopted by the
                       Telecommunications Industry Forum (TCIF) as the "811
                       Guidelines" specifically for the purposes of
                       telecommunications billing.

                       3.3.1.2.4 For the exchange of daily usage data, including
                       third party billed, collect, and card calls, U S WEST
                       will use the Bellcore EMIR format for the records, using
                       the Connect Direct, otherwise also known as the
                       Connect:Direct method to transmit the information to
                       carriers.

                       3.3.1.2.5 For the exchange of Centralized Message
                       Distribution System ("CMDS") data, U S WEST will use the
                       existing CMDS record format, and again will use the
                       Connect Direct method to transmit the information to
                       carriers.

3.3.1.3 Provisioning

When the "pre-ordering" and "ordering" steps are completed, the requisite
information will have been obtained from the customer and the initiation of a
work order can begin. Submitting a work order will result in the provisioning
and installation, if necessary, of a customer's service. The functional set
required to order service is: open a work order, cancel a work order, change a
work order, send a firm order confirmation, send notification of order jeopardy,
send notification of status change, and send notification of order completion.

                                       21
<PAGE>

                       3.3.1.3.1 Work Order Request & Receipt

                       Enables Pac-West to submit a work request indicating the
                       actions required for the provisioning of products,
                       services and features, acknowledges the receipt of the
                       work order, and includes the date and time the
                       transaction was received.

                       3.3.1.3.2 Work Order Change & Cancellation

                       Enables Pac-West to submit a change request or
                       cancellation notice in order to modify a previously
                       submitted work order.

                       3.3.1.3.3 Status Query

                       Gives Pac-West the ability to determine the current
                       status of orders and will include the due date and
                       remarks pertinent to the order status.

                       3.3.1.3.4 Jeopardy Notification & Response

                       Provides Pac-West with a notification that the requested
                       due date cannot be met for a non-confirmed order or that
                       there is a critical date in jeopardy for a confirmed
                       order and will accept Pac-West response indicating the
                       action to be taken on the jeopardy notification.

                       3.3.1.3.5 Firm Order Confirmation

                       Provides Pac-West with a confirmation that the work order
                       has been accepted and is anticipated to be completed by
                       the due date. If the due date cannot be met, Pac-West
                       will receive a Jeopardy Notification, not a Firm Order
                       Confirmation.

                       3.3.1.3.6 Work Order Completion

                       Provides Pac-West notification that the order has been
                       completed, including a summary of the account containing
                       directory information, services, associated features, and
                       recurring and non-recurring charges.

              3.3.2 Permanent Access to Systems Interfaces

                       3.3.2.1      U S WEST shall provide to Pac-West a
                                    real-time, electronic interface(s) for
                                    transferring and receiving information and
                                    executing service pre-ordering, ordering,
                                    provisioning, maintenance and repair
                                    transactions for unbundled Network Elements
                                    and Resale Services, and any other database
                                    access required by FCC rules and
                                    regulations. In addition, U S WEST shall
                                    also provide the electronic interfaces
                                    specified in this Agreement which support
                                    business processes or database access. The
                                    interface(s) shall be capable of supporting
                                    all of the steps in the OBF developed
                                    ordering and provisioning process. These
                                    steps include pre-order service inquiry, pre
                                    order service inquiry response, firm order
                                    acknowledgment/rejection, firm order
                                    confirmation, and completion notification.

                                       22
<PAGE>

                                   3.3-2.1.1 The Parties will jointly review
                                   each OBF standard upon completion. The review
                                   shall be completed within thirty (30) days,
                                   unless otherwise agreed to by the Parties.
                                   The review shall result in a mutual agreement
                                   on whether the new standard will be deployed.
                                   Within thirty (30) days of agreement to
                                   deploy the new standard, the Parties shall
                                   agree on a schedule for such deployment.

                     3.3.2.2       U S WEST shall provide Pac-West a common
                                   electronic interface that will permit the
                                   transmittal of business and residential
                                   transactions.

   3.3.3 Ordering and Provisioning for Resale Services

         U S WEST shall provide a real time electronic interface with at least
         the following specifications:

                      3.3.3.1       U S WEST shall provide to Pac-West a
                                    real-time, electronic interface to U S WEST
                                    information systems to allow Pac-West to
                                    assign telephone number(s) (if the Customer
                                    does not already have a telephone number or
                                    requests a change of telephone number).

                      3.3.3.2       For Resale Services not subject to standard
                                    intervals, U S WEST shall provide to
                                    Pac-West a real-time, electronic interface
                                    to schedule dispatch and installation
                                    appointments.

                      3.3.3.3       U S WEST shall provide to Pac-West a
                                    real-time, electronic interface to U S WEST
                                    Customer information systems which will
                                    allow Pac-West to determine if a service
                                    call is needed to install the line or
                                    service.

                      3.3.3.5       U S WEST shall provide to Pac-West a
                                    real-time, electronic interface which
                                    transmits status information on service
                                    orders.

   3.3.4 Ordering and Provisioning for Unbundling

                       3.3.4.1      For unbundled Network Elements not subject
                                    to standard intervals, U S WEST shall
                                    provide to Pac-West, when available, a
                                    real-time, electronic interface which will
                                    allow Pac-West to schedule appointments, and
                                    adjust pending order due dates in real-time.

                       3.3.4.2      U S WEST shall provide Pac-West with results
                                    from mechanized loop tests.

                       3.3.4.3      U S WEST shall provide Pac-West with
                                    confirmation of circuit assignments.

3.4 Standards

    3.4.1 General Requirements

                       3.4.1.1      Pac-West and U S WEST shall agree upon the
                                    appropriate ordering and provisioning codes
                                    to be used for each Network Element or
                                    Combinations

                                       23
<PAGE>

                                    thereof These codes shall apply to all
                                    aspects of the unbundling of that Network
                                    Element or Combination of Network Elements
                                    and shall be known as data elements as
                                    defined by the Telecommunications Industry
                                    Forum Electronic Data Interchange Service
                                    Order Subcommittee (TCIF-EDI-SOSC), or as
                                    mutually agreed.

   3.5 Performance Measurements and Reporting

              [Intentionally left blank for numbering consistency]

              3.5.2   Quality Measurements

                      [Intentionally left blank for numbering consistency]

              3.5.3    Reporting

                      [Intentionally left blank for numbering consistency]

4.       Connectivity Billing and Recording

This Section 4 describes the requirements for U S WEST to bill and record all
charges Pac-West incurs for purchasing services under this Agreement.

     4.1 Procedures

         4.1.1    The Parties recognize that deviations and discrepancies may
                  occur from the various industry standards and other standards
                  referenced in this Agreement. Subject to such discrepancies
                  and deviations, U S WEST shall comply with these various
                  standards. Discrepancies and deviations will be documented and
                  reviewed.

                  4.1.1.1    Within forty-five (45) days after the Effective
                             Date of this Agreement, the Parties will develop
                             processes by which U S WEST will inform Pac-West of
                             deviations from standards for billing. The Parties
                             agree that they will negotiate discrepancies and
                             deviations in good faith. Further, the Parties
                             agree that those documented deviations from such
                             standards documented by U S WEST to Pac-West shall
                             supersede sections of technical standards
                             applicable to such deviations referenced in this
                             Agreement.

         4.1.2    U S WEST shall record and bill in accordance with this
                  Agreement those charges Pac-West incurs as a result of
                  Pac-West purchasing from U S WEST services, as set forth in
                  this Agreement (hereinafter "Connectivity Charges").

         4.1.3    U S WEST shall format each bill for Connectivity Charges
                  (hereinafter "Connectivity Bill") in accordance with the CRIS,
                  CABS or SECAB standard as appropriate to the services
                  billed.(5)

----------

5        Procedural Order, July 14, 1997, pages 18-19.

                                       24
<PAGE>

         4.1.4    Each service purchased by Pac-West shall be assigned a
                  separate and unique billing code or identifier in the form
                  agreed to by the Parties and such code or identifier shall be
                  provided to Pac-West on each Connectivity Bill in which
                  charges for such services appear. Each such billing code or
                  identifier shall enable Pac-West to identify the service as
                  purchased by Pac-West

         4.1.5    Each Connectivity Bill shall set forth the quantity and
                  description of each such service provided and billed to
                  Pac-West. All Connectivity Charges billed to Pac-West shall
                  indicate the state from which such charges were incurred.

         4.1.6    U S WEST shall bill Pac-West for each service supplied by U S
                  WEST to Pac-West pursuant to this Agreement at the rates set
                  forth in Attachment 1 to this Agreement.

         4.1.7    U S WEST shall bill Pac-West for the Connectivity Charges
                  incurred; provided, however, that for those usage-based
                  Connectivity Charges where actual charge information is not
                  determinable by U S WEST because the jurisdiction (i.e.,
                  interstate, interstate/interLATA, intrastate, intrastate/
                  intraLATA, local) of the traffic is unidentifiable, or for any
                  other reason, the Parties shall jointly develop a process to
                  determine the appropriate charges.

         4.1.8    Measurement of usage-based Connectivity Charges shall be in
                  actual conversation seconds. For local interconnection traffic
                  provided under Attachments 3 and 4 of this Agreement, the
                  total conversation time per chargeable traffic types shall be
                  totaled for the entire monthly bill cycle, rounded to the next
                  whole minute and then billed at the contract rate. For Resale
                  services provided under Attachment 2 of this Agreement, the
                  total conversation time shall be measured in accordance with U
                  S WEST's retail tariff and billed at the contract rate.

         4.1.9    U S WEST shall provide to Pac-West, at no additional charge, a
                  Single Point of Contact for handling any Connectivity Billing
                  questions or problems that may arise during the implementation
                  and performance of the terms and conditions of this Agreement

         4.1.10   U S WEST shall provide a Single Point of Contact for the
                  handling of any data exchange questions or problems that may
                  arise during the implementation and performance of the terms
                  and conditions of this Agreement.

         4.1.11   As soon as possible after the Effective Date of this
                  Agreement, each Party shall provide the other Party written
                  notice of which form of the monthly Connectivity Bill is to be
                  deemed the official bill to assist the Parties in resolving
                  any conflicts that may arise between the official bill and
                  another form of bill received via a different media which
                  purportedly contains the same charges as are on the official
                  bill.

         4.1.12   If either Party requests an additional copy(ies) of a bill,
                  such Party shall pay the other Party a reasonable fee per
                  additional bill copy, unless such copy was requested due to
                  errors, omissions, or corrections or the failure of the
                  transmission to comply with the specifications set forth in
                  this Agreement

         4.1.13   When sending Connectivity Bills via electronic transmission,
                  to avoid transmission failures or the receipt of Connectivity
                  Billing information that cannot be processed, Pac

                                       25
<PAGE>

                  West shall provide U S WEST process specifications. U S WEST
                  shall comply with mutually agreed upon processing
                  specifications when U S WEST transmits Connectivity Billing
                  data to Pac-West. Pac-West shall provide to U S WEST notice if
                  a Connectivity Billing transmission is received that does not
                  meet mutually agreed upon Pac-West specifications. Faulty or
                  failed transmissions shall be corrected and resubmitted to
                  Pac-West, at U S WEST's sole expense.

         4.1.14   U S WEST shall deliver to a location specified by Pac-West,
                  billing information via Connect Direct, magnetic tape or
                  paper, as agreed to by Pac-West and U S WEST. In the event of
                  an emergency, system failure or other such condition which
                  prevents U S WEST from transmitting via Connect Direct, U S
                  WEST shall notify Pac-West of such difficulties within two (2)
                  hours of detection. U S WEST shall deliver to, a location
                  specified by Pac-West, billing information via magnetic tape
                  or paper, as agreed to by Pac-West and U S WEST. The Parties
                  acknowledge that all tapes transmitted to the other Party via
                  U.S. Mail or overnight delivery service and which contain
                  Connectivity Billing data shall not be returned to the sending
                  party.

         4.1.15   [intentionally left blank for numbering consistency]

         4.1.16   Billed amounts which are being reasonably disputed or
                  reasonably queried or for which reasonable claims have been
                  filed, are not due for payment until such disputes, claims or
                  queries have been fully resolved by both Pac-West and U S
                  WEST.

         4.1.17   [intentionally left blank for numbering consistency]

         4.1.18   Bill Reconciliation

                  4.1.18.1      Each Party agrees to notify the other Party upon
                                the discovery of a billing discrepancy ("Notice
                                of Discrepancy").

                  4.1.18.2      In the event of such Notice of Discrepancy, the
                                Parties shall endeavor to resolve the
                                discrepancy within sixty (60) calendar days
                                after the Notice of Discrepancy is issued using
                                normal business procedures. If the discrepancy
                                is disputed, resolution of such dispute is
                                expected to occur at the first level of
                                management resulting in a recommendation for
                                settlement of the dispute and closure of a
                                specific billing period.

                  4.1.18.3      Closure of a specific billing period shall occur
                                by joint agreement of the Parties whereby the
                                Parties agree that such billing period is closed
                                to any further analysis and financial
                                transactions, except those resulting from an
                                Audit. Closure shall take place within nine (9)
                                months of the Bill Date. The month being closed
                                represents those Connectivity Charges that were
                                billed or should have been billed by the
                                applicable bill date.

                 4.1.18.4      If the dispute is not resolved within the
                               allotted time frame, the following resolution
                               procedure shall begin:

                                       26
<PAGE>

                       4.1.18.4.1   If the dispute is not resolved within sixty
                                    (60) days of the Notice of Discrepancy, the
                                    dispute shall be escalated to the second
                                    level of management for resolution.

                       4.1.18.4.2   If the dispute is not resolved within ninety
                                    (90) days of Notice of Discrepancy, the
                                    dispute shall be escalated to the third
                                    level of management for resolution.

                       4.1.18.4.3   If the dispute is not resolved within one
                                    hundred and twenty (120) days of the Notice
                                    of Discrepancy, upon the written request of
                                    either Party within such one hundred and
                                    twenty (120) day period, the dispute may be
                                    resolved pursuant to the dispute resolution
                                    provision set forth in Part A of this
                                    Agreement.

         4.1.19   U S WEST shall reimburse Pac-West for incorrect Connectivity
                  Billing charges, including, without limitation, overcharges,
                  services ordered or requested but not delivered, interrupted
                  services, and services of poor quality and installation
                  problems, if such problems are caused by U S WEST. Such
                  reimbursements shall be set forth in the appropriate section
                  of the Connectivity Bill pursuant to appropriate standards.

         4.1.20   The Parties agree to record call information in accordance
                  with this Section 4.1. To the extent technically feasible,
                  each Party shall record all call detail information associated
                  with every call that one Party bills to the other Party.
                  Pac-West may request, through the Bona Fide Request process
                  the recording of call records and/or call detail information
                  that is not currently recorded by U S WEST. These records
                  shall be provided and retained pursuant to Section 5 of this
                  Attachment.

         4.1.21   When Pac-West collocates with U S WEST in U S WEST's facility
                  as described in this Agreement, capital expenditures (e.g.,
                  costs associated with building the "cage"), shall not be
                  included in the Connectivity Bill provided to Pac-West
                  pursuant to this Attachment 5. All such capital expenses shall
                  be given a unique BAN and invoice number. All invoices for
                  capital expenses shall be sent to the location specified by
                  Pac-West for payment. All other non-capital recurring
                  collocation expenses shall be billed to Pac-West in accordance
                  with this Agreement. The CABS/SECABS Billing Output
                  Specifications (BOS) documents provide the guidelines on how
                  to bill the Connectivity Charges associated with collocation.

        4.1.22    Local Number Portability

                  4.1.22.1 In accordance with the terms and conditions set forth
                           in this Agreement U S WEST shall record and provide
                           to Pac-West all detail information associated with an
                           alternately billed call to an Pac-West local exchange
                           customer whose telephone number has been ported from
                           U S WEST under INP as further described in this
                           Agreement

                                       27
<PAGE>

4.1.23 Meet Point Billing

          4.1.23.1     Pac-West and U S WEST will establish meet-point billing
                       ("MPB") arrangements in accordance with the Meet Point
                       Billing guidelines adopted by and contained in the OBF's
                       MECAB and MECOD documents, except as otherwise mutually
                       agreed to by the Parties. Both Parties will use their
                       best reasonable efforts, individually and collectively,
                       to maintain provisions in their respective federal and
                       state access tariffs, and/or provisions within the
                       National Exchange Carrier Association (NECA) Tariff No.
                       4, or any successor tariff to reflect the MPB
                       arrangements identified in this Agreement, in MECAB and
                       in MECOD.

          4.1.23.2     The Parties will agree on a meet point percentage to
                       enable the joint provisioning and billing of Switched
                       Access Services to third parties in conformance with the
                       Meet Point Billing guidelines adopted by and contained in
                       the OBF's MECAB and MECOD documents and referenced in U S
                       WEST's Switched Access Tariffs. The Parties understand
                       and agree that MPB arrangements are available and
                       functional only to/from IXCs who directly connect with
                       the tandem(s) that Pac-West sub-tends in each LATA.

          4.1.23.3     The Parties will use reasonable efforts, individually and
                       collectively, to maintain provisions in their respective
                       federal and state access tariffs, and/or provisions
                       within the National Exchange Carrier Association (NECA)
                       Tariff No. 4, or any successor tariff, sufficient to
                       reflect this MPB arrangement, including MPB percentages.

          4.1.23.4     Pac-West and U S WEST will implement the "Multiple
                       Bill/Single Tariff" option in order to bill any
                       interexchange carrier (IXC) for that portion of the
                       network elements provided by Pac-West and U S WEST. For
                       all traffic carried over the MPB arrangement, Pac-West
                       and U S WEST shall bill IXCs for all applicable elements
                       at the rates specified in their respective tariffs.

          4.1.23.5     U S WEST shall provide to Pac-West the billing name,
                       billing address, and carrier identification code (CIC) of
                       the IXCs that may utilize any portion of Pac-West network
                       in an Pac-West/U S WEST MPB arrangement in order to
                       comply with the MPB notification process as outlined in
                       the MECAB document. Such information shall be provided to
                       Pac-West in the format and via the medium that the
                       Parties agree. If U S WEST does not have a CIC for any
                       IXC that will utilize a portion of Pac-West network in an
                       Pac-West/U S WEST MPB arrangement, and for whom U S WEST
                       must supply to Pac-West MPB billing information, then
                       until such carrier has obtained a CIC, U S WEST will
                       submit the LEC's CIC on those MPB records provided to
                       Pac-West for MPB. U S WEST understands and agrees that it
                       will be solely responsible for obtaining any
                       reimbursements from such carriers who have utilized the
                       jointly provided networks of U S WEST and Pac-West

                                       28
<PAGE>

     4.1.23.6       U S WEST and Pac-West agree that in an MPB  arrangement
                    where one Party provides local  transport and the other
                    Party  provides the end office  switching,  the Party who
                    provides the end office  switching is entitled to bill any
                    residual  interconnection  charges (RIC) and common carrier
                    line (CCL) charges associated with the traffic.  The Parties
                    further agree that in those MPB situations  where one Party
                    sub-tends the other Party's access tandem,  the Party
                    providing the access tandem in only entitled to bill the
                    access tandem fee and any associated  local  transport
                    charges.  The Parties also agree that the Party who provides
                    the end office  switching is entitled to bill end office
                    switching fees, local transport charges, RIC and CCL
                    charges, as appropriate, and such other applicable charges.

     4.1.23.7       U S WEST and Pac-West will record and transmit MPB
                    information in accordance with the standards and in the
                    format set forth in this Attachment U S WEST and Pac-West
                    will coordinate and exchange the billing account reference
                    ("BAR") and billing account cross reference (BACR) numbers
                    for the MPB arrangements described in this Agreement. Each
                    Party will notify the other if the level of billing or other
                    BAR/BACR elements change, resulting in a new BAR/BACR
                    number.

     4.1.23.8       If MPB data is not processed and delivered by either U S
                    WEST or Pac-West and sent to the other Party within ten (10)
                    calendar days of the relevant recording period and in turn
                    such Party is unable to bill the IXC for the appropriate
                    charges, the Party who failed to deliver the data will be
                    held liable for the amount of the unbillable charges.

     4.1.23.9       If MPB data is not submitted within ten (10) calendar days
                    of the relevant recording period or is not in the proper
                    format as set forth in this Agreement, and if as a result
                    the other Party is delayed in billing the IXC for the
                    appropriate charges it incurs, the delaying Party shall pay
                    the other Party a late MPB data delivery charge which will
                    be the total amount of the delayed charges times a monthly
                    rate that shall not exceed 1.5% which may be levied by law
                    for commercial transactions, compounded daily for the number
                    of days from the date the MPB charges should have been
                    received to and including the date the MPB charge
                    information is actually received.

     4.1.23.10      Errors in MPB data exchange by the Parties may be discovered
                    by Pac-West, U S WEST or the billable IXC. Both Pac-West and
                    U S WEST agree to provide the other Party with notification
                    of any discovered errors within two (2) Business Days of the
                    discovery. The other Party shall correct the error within
                    eight (8) Business Days of notification and resubmit the
                    data. In the event the errors cannot be corrected within the
                    time period specified above, the erroneous data shall be
                    considered lost. If MPB data is lost due to uncorrectable
                    errors or otherwise, the Parties shall follow the procedures
                    set forth in Section 5 of this Attachment and compensate the
                    other for the lost MPB billing data.

                                       29
<PAGE>

                  4.1.23.11    In the event Pac-West purchases from U S WEST
                               Network Elements, or Combination thereof, in a
                               LATA other than the LATA to or from which the MPB
                               services are homed and in which US WEST operates
                               an access tandem, U S WEST shall, except in
                               instances of capacity limitations, permit and
                               enable Pac-West to sub-tend the U S WEST access
                               tandem switch(es) nearest to the Pac-West rating
                               point(s) associated with the NPA-NXX(s) to/from
                               which the MPB services are homed. In such event,
                               Pac-West shall be responsible  for the transport
                               facilities crossing LATA boundaries. In instances
                               of capacity limitation at a given access tandem
                               switch, Pac-West shall be allowed to subtend to
                               the next nearest U S WEST access tandem switch in
                               which sufficient capacity is available. The MPB
                               percentages for each new rating point/access
                               tandem pair shall be calculated in accordance
                               with MECAB and MECOD.

     4.2 Information Exchange and Interfaces

         4.2.1    U S WEST shall provide Pac-West a monthly Connectivity Bill
                  that includes all Connectivity Charges incurred by and credits
                  and/or adjustments due to Pac-West for those services ordered,
                  established, utilized, discontinued or performed pursuant to
                  this Agreement For each account, U S WEST shall issue one (1)
                  bill per month and the billing cycle shall be on a calendar
                  basis. Each Connectivity Bill provided by U S WEST to Pac-West
                  shall include:

                  4.2.1.1  all non-usage sensitive charges incurred for the
                           current bill period.

                  4.2.1.2  any known unbilled non-usage sensitive charges for
                           prior periods;

                  4.2.1.3  usage sensitive charges for the current relevant bill
                           period (from the last bill date and extending up to,
                           and including, the current bill date);

                  4.2.1.4  any known unbilled usage sensitive charges for prior
                           periods; and

                  4.2.1.5  any known unbilled adjustments.

         4.2.3    The bill date must be present on each bill transmitted by U S
                  WEST to Pac-West, must be a valid calendar date, and not more
                  than ninety (90) days old. Connectivity Bills shall not be
                  rendered for any Connectivity Charges which are incurred under
                  this Agreement on or before two hundred and seventy (270) days
                  preceding the bill date, except as otherwise permitted by law.

         4.2.4    On each bill where "Jurisdiction" is identified, local and
                  local toll charges shall be identified as "Local"' and not as
                  interstate, interstate/interLATA, intrastate, or
                  intrastate/intraLATA. U S WEST shall provide from and through
                  dates for charges rendered on all Connectivity Bills.

         4.2.5    U S WEST shall separately identify business charges from
                  residence charges, as appropriate, and shall assign a specific
                  adjustment or reference number provided by Pac-West to each
                  adjustment and credit included on the Connectivity Bill.

                                       30
<PAGE>

         4.2.6    U S WEST and Pac-West shall issue all Connectivity Bills in
                  accordance with the terms and conditions set forth in this
                  Section 4. On Connectivity Bills U S WEST renders to Pac-West,
                  Billing Account Numbers (BANs) shall be thirteen (13)
                  character alpha/numeric and there shall only be one (1) BAN
                  per State unless otherwise agreed to by the Parties. The Bill
                  Date shall be the same day month to month. Each Party shall
                  provide the other Party at least thirty (30) calendar days
                  written notice prior to changing, adding or deleting a BAN.
                  The Parties shall provide one (1) Connectivity Billing invoice
                  associated with each BAN. Each invoice must contain an invoice
                  number, which will vary from month to month. On each bill
                  associated with a BAN, the appropriate invoice number and the
                  charges contained on such invoice must be reflected. All
                  Connectivity Bills must be received by the other Party no
                  later than ten (10) calendar days from the bill date and at
                  least thirty-five (35) calendar days prior to the payment due
                  date (as described in Part A of this Agreement), whichever is
                  earlier. Any Connectivity Bill received on a Saturday, Sunday
                  or a day designated as a bank holiday will be deemed received
                  the next Business Day. If either Party fails to receive
                  Connectivity Billing data and information within the time
                  period specified above, then the payment due date will be
                  extended by the number of days receipt has been delayed.

         4.2.7    U S WEST shall issue all Connectivity Bills containing such
                  billing data and information in accordance with the most
                  current version of CRIS or CABS/SECABS published by Bellcore,
                  or its successor, or such later versions as are adopted by
                  Bellcore, or its successor, as appropriate to the services
                  being billed. To the extent there are no CRIS, CABS, or SECAB
                  standards governing the formatting of certain data, such data
                  shall be issued in the format mutually agreed to by U S WEST
                  and Pac-West, and in accordance with Attachment 6 to this
                  Agreement.(6)

         4.2.8    As detailed in the MECAB document, Pac-West and U S WEST will
                  exchange all information necessary to bill third parties for
                  switched access services traffic jointly handled by Pac-West
                  and US WEST via the meet point arrangement in a timely
                  fashion. Information shall be exchanged in Exchange Message
                  Record ("EMR") format (Bellcore Standard BR 010-200-010, as
                  amended) on magnetic tape or via a mutually acceptable
                  electronic file transfer protocol. The Parties will exchange
                  records pursuant to this paragraph without additional
                  compensation.

         4.2.9    U S WEST and Pac-West agree that each Party shall transmit
                  Connectivity Billing information and data in the appropriate
                  format as provided herein, electronically via Connect Direct
                  to the other Party at the location specified by such Party.
                  Pac-West data centers will be responsible for originating the
                  calls for data transmission. U S WEST shall transmit in
                  accordance with the technical specifications mutually agreed
                  upon by the Parties. Pac-West will supply to U S WEST its RACF
                  ID and password before the first transmission of data via
                  Connect Direct. Any changes to either Party's Connect Direct
                  Node ID must be sent to the other Party no later than thirty
                  (30) calendar days before the changes take effect.

----------

6         Procedural Order, July 14, 1997, pages 18-19.

                                       31
<PAGE>

          4.2.10    In emergency situations when tape transmittal has been used,
                    U S WEST shall adhere to the tape packaging requirements set
                    forth in this Agreement. Where magnetic tape shipping
                    containers are transported in freight compartments, adequate
                    magnetic field protection shall be provided by keeping a
                    6-inch distance from any magnetic field generating device
                    (except a magnetron-tape device). U S WEST shall only use
                    those shipping containers that contain internal insulation
                    to prevent damage. U S WEST shall clearly mark on the
                    outside of each shipping container its name, contact and
                    return address. U S WEST shall not ship any Connectivity
                    Billing tapes in unprotected tape canisters.

          4.2.11    All emergency billing data transmitted via tape must be
                    provided on a cartridge (cassette) tape and must be of high
                    quality, conform to the Parties' record and label standards,
                    9-track, odd panty, 6250 BPI group coded recording mode and
                    extended binary-coded decimal interchange code (EBCDIC).
                    Each reel of tape must be 100% tested at 20% or better
                    "clipping" level with full width certification and permanent
                    error free at final inspection. Pac-West reserves the right
                    to destroy a tape that has been determined to have
                    unrecoverable errors. Pac-West also reserves the right to
                    replace a tape with one of equal or better quality.

          4.2.12    The header record will be formatted in accordance with the
                    appropriate IBM, CABS or EDI standards as mutually agreed
                    upon by the Parties.

          4.2.13    A single 6-digit serial number must appear on the external
                    (flat) surface of the tape for visual identification. This
                    number shall also appear in the "dataset serial number
                    field" of the first header record of the IBM standard tape
                    label. This serial number shall consist of the character "V"
                    followed by the reporting location's four digit Originating
                    Company Code and a numeric character chosen by the sending
                    Party. The external and internal label shall be the same.
                    The dataset name shall appear on the flat side of the reel
                    and also in the "data set name field" on the first header
                    record of the IBM standard tape label. U S WEST's name,
                    address, and contact shall appear on the flat side of the
                    cartridge or reel.

          4.2.14    Tape labels shall conform to IBM OSVS Operating System
                    Standards contained in the IBM Standard Labels Manual. IBM
                    standard labels are 80-character records recorded in EBCDIC,
                    odd parity.

          4.2.15    U S WEST shall conform to the Standard Volume Label Format
                    which will be mutually agreed upon by the Parties.

          4.2.16    U S WEST shall use the IBM Standard Dataset Label Format
                    which will be mutually agreed upon by the Parties.

          4.2.17    U S WEST shall use test and production dataset format which
                    will be mutually agreed upon for all Connectivity Bills.

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<PAGE>

         4.2.18(7)  Interim Billing Interfaces Processes

                    U S WEST offers interfaces for the exchange of several types
                    of billing data: Monthly Billing Information, Daily Usage
                    Data, Local Account Maintenance Report, Centralized Message
                    Distribution System (CMDS) messages, Routing of in-region
                    intraLATA collect, calling card, and third number billed
                    messages

                    4.2.18.1 Monthly Billing Information

                    Includes all connectivity charges, credits, and adjustments
                    related to Network Elements and U S WEST-provided local
                    service.

                    4.2.18.2 Daily Usage Data

                    The accumulated set of call information for a given day as
                    captured, or "recorded," by the network switches. U S WEST
                    will provide this data to Pac-West with the same level of
                    precision and accuracy it provides itself. Such precision
                    cannot and will not exceed the current capabilities of the
                    software in the switches as of the Effective Date of this
                    Agreement.

                    4.2.18.3 Local Account Maintenance Report

                    A report, consisting of the list of phone numbers to which
                    the carrier providing service since the last report, and the
                    list of phone numbers to the carrier is no longer providing
                    service since the last report.

                    4.2.18.4 Centralized Message Distribution System ("CMDS")

                    Distribution of CDMS messages for Pac-West customers

                    4.2.18.5 Routing of In-region intraLATA Collect, Calling
                    Card, and Third Billed Messages

                    U S WEST will distribute in-region intraLATA collect,
                    calling card, and third number billed messages to Pac-West
                    and exchange with other CLECs operating in-region in a
                    manner consistent with existing inter-company processing
                    agreements. Whenever the daily usage information is
                    transmitted to a carrier, it will contain the records for
                    these types of calls as well.

     4.3 Standards

          4.3.1    At least thirty (30) calendar days prior to U S WEST sending
                   Pac-West a mechanized bill for the first time via electronic
                   transmission, U S WEST shall send to Pac-West Connectivity
                   Bill data in the appropriate mechanized format (e.g., CABS or
                   SECAB) for testing to ensure that bills can be processed and
                   that bills comply with the requirements of this Attachment.
                   After receipt of the test data from U S WEST, Pac-West will
                   notify

----------

7    MCIm Order, pp. 15-16 at Issue 27 and AT&T Order at Issue 41.

                                       33
<PAGE>

               U S WEST if the connectivity billing transmission meets Pac-West
               testing specifications. If the transmission fails to meet the
               mutually agreed upon test and production dataset format, then, U
               S WEST shall make the necessary corrections within a mutually
               agreeable time frame. At least three (3) sets of testing data
               must meet Pac-West testing specifications prior to U S WEST
               sending Pac-West a mechanized production connectivity bill for
               the first time via electronic transmission or tape. Thereafter, U
               S WEST may begin sending Pac-West production connectivity bills
               via electronic transfer on the next bill date, or within ten (10)
               calendar days, whichever is later.

     4.3.2     U S WEST shall also provide to Pac-West's designated point of
               contact, U S WEST's applicable operating company number ("OCN")
               at least thirty (30) days prior to testing and at least thirty
               (30) days prior to a change of OCN.

     4.3.3     At least ninety (90) days prior to any change in existing formats
               or change to a different format, U S WEST shall send to Pac-West
               Connectivity Bill data in the appropriate mechanized format for
               testing to ensure that the bills can be processed and that the
               bills comply with the requirements of this Attachment. U S WEST
               agrees that it shall not send to Pac-West bill data in the new
               mechanized format until such bill data has met the testing
               specifications as set forth in this Section.

     4.3.4     During the testing period, in addition to CONNECT DIRECT, US WEST
               shall also transmit to Pac-West Connectivity Billing data and
               information via paper or tape as specified by Pac-West. Test
               tapes shall be sent to an Pac-West specified location.

     4.3.5     For Connectivity Bills issued in CABS or SECAB format, U S WEST
               agrees that if it transmits data to Pac-West in a mechanized
               format, U S WEST shall also comply with the following
               specifications which are not contained in CABS or SECAB
               guidelines but which are necessary for Pac-West to process
               Connectivity Billing information and data:

               4.3.5.1  The bill date shall not contain spaces or non-numeric
                        values.

               4.3.5.2  Each Connectivity Bill must contain at least one (1)
                        detail record.

               4.3.5.3  Any "from" date should be less than or equal to the
                        associated "thru" date and neither date can contain
                        spaces.

               4.3.5.4  The invoice number must not have embedded spaces or low
                        values.

     4.3.6     U S WEST agrees that in order to ensure the proper performance
               and integrity of the entire Connectivity Billing process, U S
               WEST shall be responsible and accountable for transmitting to
               Pac-West an accurate and current bill. U S WEST agrees to
               implement control mechanisms and procedures to render a bill that
               accurately reflects the services ordered and used by Pac-West.

                                       34
<PAGE>

5.       Provision Of Customer Usage Data

This Section 5 sets forth the terms and conditions for U S WEST's provision of
Recorded Usage Data (as defined in this Attachment 5) to Pac-West and for
information exchange regarding long distance billing.

     5.1 Procedures

      5.1.1 General

         5.1.1.1      U S WEST shall comply with various industry, OBF, and
                      other standards referred to throughout this Agreement. To
                      satisfy these requirements, the Parties agree to a mutual
                      interpretation of all standards referred to in this
                      Section.

         5.1.1.2      The Parties shall mutually agree to OBF standards and the
                      additional standards outlined in this Agreement when
                      recording and transmitting Usage Data.

         5.1.1.3      As new standards are developed and adopted by industry,
                      U S WEST and Pac-West will negotiate mutually agreeable
                      implementation of those standards.

         5.1.1.4      U S WEST shall record all usage to be billed to Pac-West
                      originating from, terminating to or billed to Pac-West
                      Customers using U S WEST services ordered by Pac-West.
                      Recorded Usage Data includes, but is not limited to, the
                      following categories of information:

                      Call attempts
                      Completed calls
                      Use of CLASS/LASS/custom features
                      Calls to information providers reached via U S WEST
                      facilities and contracted by U S WEST
                      Calls to Directory Assistance where U S WEST provides such
                      service to an Pac-West customer
                      Calls completed via U S WEST-provided Operator Services
                      where U S WEST provides such service to Pac-West local
                      service Customer
                      For U S WEST-provided Centrex Service, station level
                      detail records shall include complete call detail and
                      complete timing information

         5.1.1.5      Retention of Records: U S WEST shall maintain a machine
                      readable back up copy of the message detail provided to
                      Pac-West for a minimum of forty five (45) calendar days. U
                      S WEST shall provide any data back-up to Pac-West upon the
                      request of Pac-West.

         5.1.1.6      U S WEST shall provide to Pac-West Recorded Usage Data for
                      Pac-West Customers only. U S WEST shall not submit other
                      carrier local usage data as part of the Pac-West recorded
                      usage data.

                                       35
<PAGE>

         5.1.1.7      U S WEST shall not bill to Pac-West Customers any
                      recurring or non recurring charges for service provided by
                      U S WEST to Pac-West except where explicitly permitted to
                      do so within a written agreement between U S WEST and
                      Pac-West.

         5.1.1.8      The Parties shall record and rate all calls to information
                      service providers (e.g., 976 service calls) and shall bill
                      such calls directly the calling party's local service
                      provider. In the event a Party's end-user disputes such a
                      call, that Party may recourse consistent with the recourse
                      arrangement the billing Party has with its information
                      service provider.

         5.1.1.9      U S WEST shall provide Recorded Usage Data to Pac-West
                      billing locations as designated by Pac-West.

         5.1.1.10     U S WEST shall establish an Interconnect Service Center
                      (ISC) or similar function to serve as Pac-West's single
                      point of contact to respond to Pac-West call usage, data
                      error, and record transmission inquiries.

                      5.1.1.10.1 US WEST shall provide Pac-West with a single
                      point of contact and remote identifiers for each sending
                      location.

         5.1.1.11     Pac-West shall provide a single point of contact
                      responsible for receiving usage transmitted by U S WEST
                      and receiving usage tapes from a courier service in the
                      event of a facility outage.

         5.1.1.12     U S WEST shall bill and Pac-West shall pay the charges for
                      Recorded Usage Data. Billing and payment shall be in
                      accordance with the applicable terms and conditions set
                      forth in the Connectivity Billing and Recording Section of
                      this Attachment 5.

         5.1.1.13     Without waiver of, and in addition to the Audit and
                      Examination rights set forth in Part A of this Agreement,
                      upon reasonable notice and at reasonable times, a Party or
                      its authorized representatives may examine the recording
                      Party's AMA records which relate to perceived problems
                      with the recordings of the usage data relating to the
                      billed Party under this Attachment.

     5.1.2 Charges

         5.1.2.1      The Parties may charge fees for recording, rating or
                      transmitting usage data. For the six (6) months following
                      the initial recording, rating or transmitting of non-test
                      usage data, the Parties shall not charge each other.

         5.1.2.2      No charges shall be assessed for incomplete call attempts.

                                       36
<PAGE>

     5.1.3    Central Clearinghouse & Settlement

         5.1.3.1      U S WEST shall support and participate with Pac-West to
                      develop an in and out-collect process developed for
                      intra-region alternately billed messages.

         5.1.3.2      U S WEST shall settle with Pac-West for both intra-region
                      and inter-region billing exchanges of calling card,
                      bill-to-third party, and collect calls, including
                      settlement through the CMDS CATS system for inter-region
                      billing.

     5.1.4    Lost Data

         5.1.4.1      Loss of Recorded Usage Data - Pac-West recorded usage data
                      determined to have been lost, damaged or destroyed as a
                      result of an error or omission by U S WEST in its
                      performance of the recording function shall, upon Pac-West
                      request, be recovered by U S WEST at no charge to
                      Pac-West. In the event the data cannot be recovered by U S
                      WEST, U S WEST shall estimate the messages and associated
                      revenue, with assistance from Pac West, based upon the
                      method described below. This method shall be applied on a
                      consistent basis, subject to modifications agreed to by U
                      S WEST and Pac-West. This estimate shall be used to adjust
                      amounts Pac-West owes U S WEST for services U S WEST
                      provides in conjunction with the provision of recorded
                      usage data.

         5.1.4.2      Partial Loss - U S WEST shall review its daily controls to
                      determine if data has been lost. When there has been a
                      partial loss, actual message and minute volumes shall be
                      reported, if possible. Where actual data are not
                      available, a full day shall be estimated for the recording
                      entity, as outlined in the following paragraphs. The
                      amount of the partial loss is then determined by
                      subtracting the data actually recorded for such day from
                      the estimated total for such day.

         5.1.4.3      Complete Loss - Estimated message and minute volumes for
                      each loss consisting of an entire AMA tape or entire data
                      volume due to its loss prior to or during processing, loss
                      after receipt, degaussed before processing, receipt of a
                      blank or unreadable tape, or lost for other causes, shall
                      be reported.

         5.1.4.4      Estimated Volumes - From message and minute volume reports
                      for the entity experiencing the loss, U S WEST shall
                      secure message/minute counts for the four (4)
                      corresponding days of the weeks preceding that in which
                      the loss occurred and compute an average of these volumes.
                      U S WEST shall apply the appropriate average revenue per
                      message ("ARPM") mutually agreed upon to the estimated
                      message volume to arrive at the estimated lost revenue.

         5.1.4.5      If the day of loss is not a holiday but one (1) (or more)
                      of the preceding corresponding days is a holiday, U S WEST
                      shall use additional preceding

                                       37
<PAGE>

                       weeks in order to procure volumes for two (2)
                       non-holidays in the previous two (2) weeks that
                       correspond to the day of the week that is the day of the
                       loss.

         5.1.4.6       If the loss occurs on a weekday that is a holiday (except
                       Christmas and Mother's Day), U S WEST shall use volumes
                       from the two (2) preceding Sundays.

         5.1.4.7       If the loss occurs on Mothers Day or Christmas, U S WEST
                       shall use volumes from that day in the preceding year
                       multiplied by a growth rate mutually agreed upon by the
                       Parties.

         5.1.4.8       Pac-West may also request data be provided that has
                       previously been successfully provided by U S WEST to
                       Pac-West. U S WEST shall reprovide such data, if
                       available, at a charge mutually agreed to by the Parties.

      5.1.5 Testing, Changes and Controls

         5.1.5.1       The Recorded Usage Data, EMIR format, content, and
                       transmission process shall be tested as mutually agreed
                       to by the Parties.

         5.1.5.2       Interface Testing: The purpose of this test is to ensure
                       that the usage records can be sent by U S WEST to
                       Pac-West and can be accepted and processed by Pac-West. U
                       S WEST shall provide a test file to Pac-West designated
                       Regional Processing Center (RPC) in the format that shall
                       be used for live day-to-day processing. The file's test
                       content and volume shall be mutually agreed to by the
                       Parties. Pac-West shall review the file and verify that
                       it conforms to its data center requirements. Pac-West
                       shall notify U S WEST in writing whether the format is
                       acceptable. Pac-West shall also provide U S WEST with the
                       agreed-upon control reports as part of this test.

         5.1.5.3       Operational Test: The purpose of this test is to ensure
                       that volumes of usage in consecutive sequence can be
                       extracted, distributed, and processed by U S WEST and
                       Pac-West.

         5.1.5.4       For testing purposes, U S WEST shall provide Pac-West
                       with U S WEST recorded usage for a minimum of five (5)
                       consecutive days. Pac-West shall provide U S WEST with
                       the message validation reports associated with test
                       usage.

         5.1.5.5       Test File: Test data should be transported via CONNECT
                       DIRECT whenever possible. In the event that courier
                       service must be used to transport test media, the
                       physical tape characteristics to be used are described in
                       this Attachment.

          5.1.5.6      Periodic Review: Control procedures for all usage
                       transferred between U S WEST and Pac-West shall require
                       periodic review. This review may

                                       38
<PAGE>

                    be included as part of an annual audit of U S WEST by
                    Pac-West or as part of the normal production interface
                    management function. Breakdowns which impact the flow of
                    usage between U S WEST and Pac-West must be identified and
                    jointly resolved as they occur. The resolution may include
                    changes to control procedures, as similar problems would be
                    avoided in the future. Any changes to control procedures
                    shall be mutually agreed upon by Pac-West and U S WEST.

          5.1.5.7   U S WEST Software Changes

             5.1.5.7.1 When U S WEST plans to introduce any software changes
             which impact the format or content structure of the usage data feed
             to Pac-West, designated U S WEST personnel shall notify Pac-West no
             less than one hundred twenty (120) calendar days before such
             changes are implemented.

             5.1.5.7.2 U S WEST shall communicate the projected changes to the
             appropriate groups in Pac-West so that potential impacts on
             Pac-West processing can be determined.

             5.1.5.7.3 Pac-West personnel shall review the impact of the change
             on the entire control structure and the post conversion test plan,
             herein. Pac-West shall negotiate any perceived problems with U S
             WEST and shall arrange to have the data tested utilizing the
             modified software.

             5.1.5.7.4 If it is necessary for U S WEST to request changes in the
             schedule, content or format of usage data transmitted to Pac-West,
             U S WEST shall notify Pac-West

          5.1.5.8 Pac-West Requested Changes

             5.1.5.8.1 Pac-West may request changes in the schedule, content,
             format of the usage data transmitted from U S WEST, as deemed
             necessary by Pac-West.

             5.1.5.8.2 When the negotiated changes are to be implemented,
             Pac-West and/or U S WEST shall arrange for testing of the modified
             data in a Post Conversion Test Plan designed to encompass all types
             of changes to the usage data transferred by U S WEST to Pac-West
             and the methods of transmission for that data.

          5.1.5.9 U S WEST System Change Description

             5.1.5.9.1 For a U S WEST system change, U S WEST shall provide
             Pac-West with an overall description of the change, stating the
             objective and a brief explanation of the reasons for the change.

                                       39
<PAGE>

             5.1.5.9.2 During the initial negotiations regarding the change, U S
             WEST shall provide a list of the specific records and/or systems
             impacted by the change to designated Pac-West personnel.

             5.1.5.9.3 U S WEST shall also provide Pac-West a detailed
             description of the changes to be implemented. It shall include
             sufficient detail for designated Pac-West personnel to analyze and
             estimate the effects of the changes and to design tests to verify
             the accuracy of the implementation.

          5.1.5.10 Change Negotiations

             5.1.5.10.1 Pac-West shall be notified in writing of all proposed
             change negotiations initiated by U S WEST in writing. In turn,
             Pac-West shall notify U S WEST in writing of proposed change
             negotiations initiated by Pac-West.

             5.1.5.10.2 After formal notification of planned changes, whether
             originated by U S WEST or Pac-West, designated Pac-West personnel
             shall schedule negotiation meetings as required with designated U S
             WEST personnel. The first meeting should produce the overall change
             description (if not previously furnished) and the list of records
             and/or systems affected.

             5.1.5.10.3 In subsequent meetings, U S WEST shall provide the
             detailed description of changes to be implemented. After reviewing
             the described changes, designated Pac-West personnel shall
             negotiate a detailed test procedure with U S WEST.

          5.1.5.11 Changes to controls: Pac-West may request changes to the
                   control structure. The Parties shall mutually agree on the
                   requested changes.

          5.1.5.12 Verification Of Changes

             5.1.5.12.1 Based on the detailed description of changes furnished
             by U S WEST, Pac-West and U S WEST personnel shall:

              Determine the type of change(s) to be implemented; Develop a
              comprehensive test plan;
              Negotiate scheduling and transfer of modified data with U S WEST;
              Negotiate testing of modified data with the appropriate Pac-West
              RPC;
              Negotiate processing of verified data through the Pac-West billing
              system with the RPC;
              Arrange for review and verification of testing with appropriate
              Pac-West groups; and

              Arrange for review of modified controls, if applicable.

                                       40
<PAGE>

                       5.1.5.13 Introduction of Changes:

                                    5.1.5.13.1 When all the testing requirements
                                    have been met and the results reviewed and
                                    accepted, designated Pac-West and U S WEST
                                    personnel shall:
                                    Negotiate an implementation schedule;
                                    Verify the existence of a contingency plan
                                    with the appropriate Pac-West personnel;
                                    Arrange for the follow-up review  of changes
                                    with appropriate Pac-West personnel;
                                    Arrange for appropriate changes in control
                                    program, if applicable; and
                                    Arrange for long-term functional review of
                                    impact of changes on the Pac-West billing
                                    system, i.e., accuracy, timeliness, and
                                    completeness.

     5.2 Information Exchange and Interfaces

              5.2.1    Core Billing Information

                       5.2.1.1      Recorded Usage Data includes all intraLATA
                                    toll and local usage. U S WEST shall provide
                                    Pac-West with unrated EMR records associated
                                    with all intraLATA toll and local usage
                                    which it records on Pac-West behalf. Any
                                    category, group and/or record types approved
                                    in the future for U S WEST shall be included
                                    if they fall within the definition of Local
                                    Resale. Pac-West shall be given notification
                                    thirty (30) days prior to implementation of
                                    a new type, category and/or record.

                       5.2.1.2      U S WEST shall provide rated EMR records
                                    only when explicit consent for sending such
                                    records has been obtained from Pac-West.

                       5.2.1.3      All messages recorded by a Party and billed
                                    to the other Party are to be transmitted to
                                    the billed Party. Recorded usage includes
                                    all usage billable to the other Party.

                       5.2.1.4      Data Delivery Schedules: Data shall be
                                    delivered to Pac-West by U S WEST daily
                                    (Monday through Friday, except holidays)
                                    unless otherwise negotiated. Pac-West and/or
                                    U S WEST Data Center holidays are excluded.
                                    U S WEST and Pac-West shall exchange
                                    schedules of designated Data Center
                                    holidays.

              5.2.2    Local Account Maintenance

                       5.2.2.1      When Pac-West purchases local service from
                                    U S WEST, and, as appropriate, when Pac-West
                                    purchases certain unbundled Network
                                    Elements, U S WEST shall provide Pac-West
                                    with local account maintenance as described
                                    herein.

                       5.2.2.2      When notified by a CLEC that an Pac-West
                                    customer has switched to CLEC's service, U S
                                    WEST shall provision the change and notify
                                    Pac-West

                                       41
<PAGE>

                      via Connect:Direct within twenty-four (24) hours of the
                      provisioning that the customer has changed to another
                      service provider ("OutPLOC").

         5.2.2.3      When notified by Pac-West that a customer has changed its
                      PIC only from one interexchange carrier to another, U S
                      WEST shall provision the PIC only change.

         5.2.2.4      If notified by an IXC using a '01' PIC order record that a
                      Pac-West Customer has changed its PIC only, U S WEST shall
                      reject the order and notify that IXC using an industry
                      standard '3148' record with the operating company number
                      of Pac-West indicated, that a '01' care PIC record should
                      be sent to Pac-West for processing.

5.2.3    Product/Service Specific

         5.2.3.1       Subject to conditions specified in Section 5.1.1(c) of
                       this Attachment 5, U S WEST shall provide a Specialized
                       Service/Service Provider Charge record to support the
                       Special Features Star Services if these features are part
                       of U S WEST's offering. Such record shall be an EMR 10-01
                       -18 record or industry standard record as may
                       subsequently be mutually agreed to by the Parties. Such
                       record shall be a 10-01-18 record or Bellcore assigned
                       record as may be subsequently agreed to by the Parties.

5.2.4 Emergency Information

         5.2.4.1       U S WEST shall provide the transport facility for
                       transmitting usage and billing data between the U S WEST
                       location and the Pac-West location. U S WEST shall
                       transmit via CONNECT DIRECT whenever possible. In the
                       event usage transfer cannot be accommodated by CONNECT
                       DIRECT because of extended (one (1) Business Day or
                       longer) facility outages, U S WEST shall contract for a
                       courier service to transport the data via tape.

         5.2.4.2       The Parties shall mutually agree to the following
                       standards when emergency data is transported to Pac-West
                       on tape or cartridge via a courier. The data shall be in
                       fixed or variable block format as mutually agreed to by
                       the Parties:

                       Tape:            9-track, 6250 (or 1600) BPI
                                        (Bytes per inch)
                       Cartridge:       38,000 BPI (Bytes per inch)
                       LRECL:           2,472 Bytes
                       Parity:          Odd
                       Character Set:   Extended Binary Coded Decimal
                                        Interchange Code (EBCDIC)
                       External labels: Exchange Carrier Name, Dataset Name
                                        (DSN) and volume serial number
                       Internal labels: IBM Industry OS labels shall be used.
                                        They consist of a single volume label
                                        and two (2) sets of header and trailer
                                        labels.

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<PAGE>

         5.2.4.1       To the extent the above standards are changed or revised,
                       the Parties may agree to negotiate the incorporation of
                       such new standards.

5.2.5 Rejected Recorded Usage Data

         5.2.5.1  At the discretion of Pac-West, any messages that cannot be
                  rated and/or billed by Pac-West may be returned to U S WEST
                  via CONNECT DIRECT. Returned messages shall be sent directly
                  to U S WEST in EMR format. Standard EMR return codes shall be
                  utilized.

5.2.6 Interfaces

         5.2.6.1  The Parties shall transmit formatted Recorded Usage Data via
                  Connect Direct.

         5.2.6.2  Pac-West shall notify U S WEST of resend requirements if a
                  pack or entire dataset must be replaced due to pack rejection,
                  damage in transit, dataset name failure, etc.

         5.2.6.3  Critical edit failure on the pack header or pack trailer
                  records shall result in pack rejection (e.g., detail record
                  count not equal to grand total included in the pack trailer).
                  Notification of pack rejection shall be made by Pac-West
                  within one (1) Business Day of processing. Rejected packs
                  shall be corrected by U S WEST and retransmitted to Pac-West
                  within twenty-four (24) hours or within an alternate time
                  frame negotiated on a case by case basis.

         5.2.6.4  A pack shall contain a minimum of one (1) message record or a
                  maximum of 9,999 message records plus a pack header record and
                  a pack trailer record. A file transmission contains a maximum
                  of ninety-nine (99) packs. A dataset shall contain a minimum
                  of one (1) pack. U S WEST shall provide Pac-West one (1)
                  dataset per sending location, with the agreed upon RAO/OCN
                  populated in the header and trailer records.

5.2.7 Formats & Characteristics

         5.2.7.1  Rated in collect messages should be transmitted via the
                  CONNECT DIRECT and can be intermingled with the unrated
                  messages. No special packing is needed.

                                       43
<PAGE>

         5.2.7.2      EMR: U S WEST shall provide Recorded Usage Data in the EMR
                      format and by category, group and record type, and shall
                      be transmitted, via a direct feed, to Pac-West. The types
                      of EMIR records that Pac-West can expect to receive from
                      US WEST, includes, but is not limited to, the following:

         Header Record         20-21-01, 20-20-01 or 20-24-01
         Trailer Record        20-21-02, 20-20-02 or 20-24-02
         Detail Records*       01-01-01, 06, 08, 14, 17, 18, 31, 32, 35, 37, 80,
                               81, 82, 10-01-01, 06, 08, 14, 17, 18, 31, 32, 35,
                               37
         Credit Records        03-01-01, 06, 08, 14, 17, 18, 31, 32, 35, 37, 80,
                               81, 82,
         Rated Credits         41-01-01, 06, 08, 14, 17,18, 31, 32, 35, 37, 80,
                               81, 82,
         Cancel Records        51-01-01, 06, 08, 09, 14, 17, 18, 31, 32, 35, 37,
                               80, 81, 82,
         Correction Records    71-01-01, 06, 08, 14, 17, 18, 31, 32, 35, 37, 80,
                               81, 82,

         * Category 01 is utilized for rated messages; Category 10 is utilized
         for unrated messages. Category 10 records are to have indicator 13
         populated with a value of 5

                      5.2.7.2.1 To the extent the above standards are changed or
                      revised, the Parties may agree to incorporate such new
                      standards.

         5.2.7.3       U S WEST shall comply with the most current version of
                       Bellcore standard practice guidelines for formatting EMIR
                       records.

         5.2.7.4       The Interfacing Bell RAO, OCN, and remote identifiers
                       shall be used by Pac-West to control invoice sequencing
                       and each shall have its own invoice controls. The OCN
                       shall also be used to determine where the message returns
                       file, containing any misdirected and unguidable usage,
                       shall be sent.

         5.2.7.5       The file's Record Format (RECFM) shall be Variable Block
                       or fixed as negotiated, Size and the Logical Record
                       Length (LRECL) shall be as mutually agreed to by the
                       Parties.

         5.2.7.6       Intentionally left blank for numbering consistency

         5.2.7.7       U S WEST shall transmit the usage to Pac-West using
                       dataset naming conventions mutually agreed upon by the
                       Parties.

5.2.8 Controls

         5.2.8.1       Pac-West shall test and certify the CONNECT DIRECT
                       interface to ensure the accurate receipt of Recorded
                       Usage Data.

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<PAGE>

     5.2.8.2      Header and trailer records shall be populated in positions
                  13-27 with the following information:

     Position

      13-14                                Invoice numbers (1-99)
      15-16                                Bell Co. ID number
      17-19                                Interfacing Bell RAO Code
      20-23                                Pac-West OCN - value 7229
      24-27                                Reseller OCN

     The trailer grand total record count shall be populated with total records
     in pack (excluding header & trailer)

     5.2.8.3      Control Reports: Pac-West accepts input data provided by U S
                  WEST in EMIR format in accordance with the requirements and
                  specifications detailed in this Attachment 5. In order to
                  ensure the overall integrity of the usage being transmitted
                  from U S WEST to Pac-West, data transfer control reports shall
                  be required. These reports shall be provided by Pac-West to U
                  S WEST on a daily or otherwise negotiated basis and shall
                  reflect the results of the processing for each pack
                  transmitted by U S WEST.

     5.2.8.4      Control Reports - Distribution: Since U S WEST is not
                  receiving control reports, dataset names shall be established
                  during detailed negotiations.

     5.2.8.5      Message Validation Reports: Pac-West shall provide Message
                  Validation reports to the designated U S WEST System Control
                  Coordinator once a day (or as otherwise agreed to by the
                  Parties). These reports shall be provided for all data
                  received within U S WEST Local Resale feed and shall be
                  transmitted Monday through Friday.

     5.2.8.6      Incorrect Pack Processing: This report provides vital
                  statistics and control totals for packs rejected and accepted
                  and dropped messages. The information is provided in the
                  following report formats and control levels:

                  U S WEST name; and
                  Reseller total messages processed in a pack;
                  Packs processed shall reflect the number of messages initially
                  erred and accepted within a pack; and
                  Reseller total packs processed.

5.3 Standards

 5.3.1    When requested for security purposes and on an exception basis when a
          reasonable need is demonstrated, a Party shall provide the other Party
          with Recorded Usage Data within two (2) hours of the call completion
          or within the same period that the recording Party would have that
          data for itself under similar circumstances. If not available in EMIR
          format, the Recorded Usage Data may be provided in AMA format.

                                       45
<PAGE>

          5.3.2    U S WEST shall include the Working Telephone Number (WTN) of
                   the call originator on each EMR call record.

          5.3.3    End user Customer usage records and station level detail
                   records shall be in packs in accordance with EMIR standards
                   or applicable industry standards as defined in Section 5.3.1
                   of this Attachment.

          5.3.4    U S WEST shall provide Recorded Usage Data once a day to
                   Pac-West on a schedule to be determined by the Parties,
                   Monday through Friday, excluding holidays. The Parties shall
                   work together to reach agreement on an acceptable holiday
                   schedule. U S WEST shall provide to Pac-West the Recorded
                   Usage Data not more than one (1) Business Day after
                   termination of the call for which usage data is to be
                   provided.

          5.3.5    U S WEST shall segregate and organize the Recorded Usage Data
                   in accordance with Section 5.2.7 of this Attachment.

     5.4  Standards for Transmitting and Recording Usage Data

          5.4.1    Within thirty (30) days of the Effective Date of this
                   Agreement, the Parties shall jointly develop standards for
                   transmitting and recording usage data.

          5.4.2    Timeliness:

          5.4.3    Completeness

          5.4.4    Accuracy:

          5.4.5    [intentionally left blank for numbering consistency]

          5.4.6    Recorded Usage Data Accuracy

          5.4.7    Usage Inquiry Responsiveness

     5.5  Reporting

          5.5.1   Within thirty (30) days of the Effective Date of this
                  Agreement, the Parties shall jointly develop reporting
                  procedures for the standards for transmitting and recording
                  usage data described in Section 5.4 above.

6.   Maintenance

     6.1(8)   Interim Maintenance and Repair Processes Repair capabilities allow
              Pac-West to report trouble with communications circuits and
              services provided by U S WEST. The functions, processes, and
              systems used in

----------

8        Per MCIm Order, pp. 15-16 at Issue 26 and MCIm/AT&T Order at Issue 41.

                                       46
<PAGE>

               repair are based on a Trouble Report JR), which is an electronic
               document maintained in one or more Operations Systems. A TR
               contains information about the customer, the trouble, the status
               of the work on the trouble and the results of the investigation
               and resolution efforts. These business capabilities will be made
               available to Pac-West in the following functional set: open a
               trouble report, cancel a trouble report, send notification of
               status change, and close a trouble report.

               6.1.1    Open Trouble Report

                        Gives Pac-West the capability to enter a trouble report
                        ("TR") which initiates U S WEST repair activities.

               6.1.2    Cancel Trouble Report

                        Gives Pac-West the capability to cancel a TR that it had
                        previously opened.

               6.1.3    Trouble Report Closure

                        Informs Pac-West as soon as a TR it opened) has been
                        closed, indicating U S WEST has completed repair
                        activities and considers the trouble resolved.

               6.1.4    Get Current Trouble Report Status

                        Allows Pac-West to request the current status of a TR
                        that the customer previously opened with U S WEST. It is
                        only allowed on trouble reports which were entered by
                        the customer requesting the status.

               6.1.5    Modify Trouble Report

                        Allows Pac-West to change certain data in a TR that the
                        customer previously opened with U S WEST, possibly
                        affecting U S WEST repair activities (with some
                        negotiable exceptions). It is only allowed on TRs which
                        were entered by the customer making the modification,
                        and does not necessarily protect the customer from
                        charges associated with previous information in the TR.

               6.1.6    Escalate Trouble Report

                        Allows Pac-West to bring a TR that the customer
                        previously opened with U S WEST to the attention of a
                        higher level of supervision within U S WEST, with the
                        expectation that the TR will get more attention. It is
                        only allowed on TRs which were entered by the customer
                        requesting the escalation, and typically needs to be
                        responded to by the per-son at the level escalated to
                        within a negotiated time frame.

               6.1.7    Verify Features

                        Allows Pac-West to verify line features on an existing
                        line.

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<PAGE>

               6.1.8    Text Messaging

                        Allows textual communication between U S WEST and
                        Pac-West personnel for the purpose of resolving the
                        trouble. The messages are logged in the TR, thus the
                        function can only be performed for TRs which were
                        entered by the customer involved in the messaging.
                        Specific uses of this messaging include allowing the
                        customer to add descriptive information about the
                        trouble, allowing U S WEST to request additional trouble
                        information, and allowing U S WEST to implement the
                        status window functionality through manual procedures.

               6.1.9    Trouble History

                        Provides Pac-West with trouble history information
                        currently retained on the circuit.

               6.1.10   Testing

                        Notifies Pac-West of the results of initial or
                        subsequent circuit tests for a TR previously opened by
                        that customer.

     6.2 General Requirements

               6.2.1    U S WEST shall provide repair, maintenance, testing, and
                        surveillance for all Telecommunications Services and
                        unbundled Network Elements and Combinations in
                        accordance with the terms and conditions of this
                        Agreement.

                        6.2.1.1  U S WEST shall provide Pac-West with the same
                                 level of maintenance support as U S WEST
                                 provides itself in accordance with standards
                                 and performance measurements that U S WEST uses
                                 and/or which are required by law, regulatory
                                 agency, or by U S WEST's own internal
                                 procedures, whichever are the most rigorous.
                                 These standards shall apply to the quality of
                                 the technology, equipment, facilities,
                                 processes, and techniques (including, but not
                                 limited to, such new architecture, equipment,
                                 facilities, and interfaces as U S WEST may
                                 deploy) that U S WEST provides to Pac-West
                                 under this Agreement.

                        6.2.1.2  U S WEST shall provide a SPOC (Single Point of
                                 Contact) for Residence, and a SPOC for Business
                                 for Pac-West to report via a toll free
                                 telephone number maintenance issues and trouble
                                 reports twenty four (24) hours a day and seven
                                 (7) days a week. The SPOC Residence toll free
                                 number, and SPOC Business toll free number,
                                 will be the numbers for all of U S WEST's
                                 fourteen (14) states.

                        6.2.1.3  U S WEST shall provide Pac-West maintenance
                                 dispatch personnel on the same schedule that it
                                 provides its own Customers.

               6.2.2    Pac-West shall handle all interaction with Pac-West
                        Customers including all calls regarding service
                        problems, scheduling of technician visits, and notifying
                        the

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<PAGE>

                        Customer of trouble status and resolution. When a U S
                        WEST technician is on site, the customer will be
                        statused in accordance with standard U S WEST
                        procedures.

               6.2.3   Pac-West and U S WEST will provide their respective
                       customers with the correct telephone numbers to call for
                       access to their respective repair bureaus.

               6.2.4   Customers of Pac-West shall be instructed to report all
                       cases of trouble to Pac-West. Customers of U S WEST shall
                       be instructed to report all cases of trouble to U S WEST.
                       Pac-West and U S WEST will provide their respective
                       repair contact numbers to one another on a reciprocal
                       basis.

               6.2.5   U S WEST shall cooperate with Pac-West to meet
                       maintenance standards for all Telecommunications
                       Services, unbundled Network Elements and Combinations
                       ordered under this Agreement. Such maintenance standards
                       shall include, without limitation, standards for testing,
                       network management, call gapping, and notification of
                       upgrades as they become available.

               6.2.6   All U S WEST employees or contractors who perform repair
                       service for Pac-West Customers shall follow mutually
                       agreed to procedures in all their communications with
                       Pac-West Customers. At a minimum, these procedures, and
                       protocols shall ensure that: (a) U S WEST employees or
                       contractors shall perform repair service that is at least
                       equal in quality to that provided to U S WEST Customers;
                       and (b) trouble calls from Pac-West Customers shall
                       receive response time priority that is at least equal to
                       that of U S WEST Customers, regardless of whether the
                       Customer is an Pac-West Customer or a U S WEST Customer.

               6.2.7   In responding to repair calls, neither Party shall make
                       disparaging remarks about each other, nor shall they use
                       repair calls as the basis for internal referrals or to
                       solicit customers to market services. Either Party may
                       respond with accurate information in answering customer
                       questions.

               6.2.8   U S WEST shall perform scheduled maintenance, including,
                       without limitation, required and recommended maintenance
                       intervals and procedures, for all Telecommunications
                       Services, Network Elements and Combinations provided to
                       Pac-West under this Agreement equal in quality to that
                       currently provided by U S WEST in the maintenance of its
                       own network.

                      6.2.8.1  U S WEST shall exercise its best efforts to
                               provide the designated Pac-West SPOC at least
                               sixty (60) days' advance notice of any scheduled
                               activity which will likely impact Pac-West
                               customers.

                      6.2.8.2  Plans for significant service affecting
                               activities shall include, at a minimum, the
                               following information: location and type of
                               facilities, specific work to be performed, date
                               and time work is scheduled to commence, work
                               schedule to be followed, date and time work is
                               scheduled to be completed, and estimated number
                               of work hours for completion. Examples of such
                               activities include, but are not limited to,
                               office conversions, cable facility rolls, and
                               tandem re-homes.

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<PAGE>

               6.2.9    U S WEST shall exercise its best efforts to notify
                        Pac-West of all non-scheduled activities to be performed
                        by U S WEST on any Network Element, including, without
                        limitation, any hardware, equipment, software, or
                        system, providing service functionality which will
                        likely impact Pac-West Customers.

                      6.2.9.1  U S WEST shall provide to the designated SPOC
                               maximum advance notice of such non-scheduled
                               activities in the same time and manner that it
                               provides to its operation service centers.

                      6.2-9.2  U S WEST shall perform emergency maintenance as
                               promptly as possible to maintain or restore
                               service and shall promptly advise the Pac-West
                               designated SPOC of any such actions it takes.

               6.2.10   U S WEST shall provide Pac-West a detailed description
                        of any and all emergency restoration plans and disaster
                        recovery plans which are in place during the term of
                        this Agreement. Such plans shall include, at a minimum,
                        the following: (a) provisions for immediate notification
                        to Pac-West of the existence, location, and source of
                        any emergency network outage potentially affecting an
                        Pac-West Customer (b) establishment of a SPOC
                        responsible for initiating and coordinating the
                        restoration of all local services and Network Elements
                        or Combinations; (c) methods and procedures to provide
                        Pac-West with real-time access to information relating
                        to the status of restoration efforts and problem
                        resolution during the restoration process; (d) an
                        inventory and description of mobile restoration
                        equipment, by location; (e) methods and procedures for
                        reprovisioning of all Telecommunications Services and
                        Network Elements or Combinations after initial
                        restoration, (0 equal priority, as between Pac-West
                        Customers and U S WEST Customers, for restoration
                        efforts, consistent with FCC Service Restoration
                        guidelines, including, without limitation, deployment of
                        repair personnel, and access to spare parts and
                        components, and (g) a mutually agreeable process for
                        escalation of maintenance problems, including a
                        complete, up-to-date list of responsible contacts, each
                        available twenty-four (24) hours per day, seven (7) days
                        per week.

                        6.2.10.1   For purposes of this Section 6, an emergency
                                   network outage is defined as 5,000 or more
                                   blocked call attempts in a ten (10) minute
                                   period for all Customers in a single
                                   exchange.

                        6.2.10.2   Pac-West and U S WEST will work cooperatively
                                   to assess up chain (end office to tandem
                                   calls), down chain (tandem to end office
                                   calls), and overall customer impact. U S WEST
                                   categorizes, reports and reacts to network
                                   outages using FCC reporting criteria and U S
                                   WEST Abnormal Condition Report Criteria.

               6.2-11   U S WEST and Pac-West shall establish mutually
                        acceptable methods and procedures for the immediate
                        handling of misdirected calls from Pac-West customers to
                        U S WEST requesting repair. The Customer shall be
                        informed that Pac-West is its local service provider
                        (LSP), and the U S WEST representative will provide the
                        Pac-West customer with the appropriate telephone number
                        of the Pac-West repair center. If the LSP screen
                        indicator is not available, the U S WEST representative
                        will ask the Pac-West Customer if it knows the name of
                        its LSP. The

                                       50
<PAGE>

               U S WEST representative will provide the Pac-West Customer with
               the appropriate number of the Pac-West repair center. These calls
               are limited to repair information only, and are not to be used
               for marketing purposes.

     6.2.12    When electronic interface is available, U S WEST shall inform
               Pac-West of repair completion and trouble reason within ten (10)
               minutes upon completion. If no electronic interface is available,
               Pac-West will provide a SPOC for U S WEST to call as soon as
               possible after repair completion. U S WEST shall notify Pac-West
               that the trouble has been cleared. This is done on a real-time
               basis. Therefore the technician will notify Pac-West in a similar
               manner, for both dispatched-in and dispatched-out troubles. The
               report shall not be considered closed until such notification is
               made. Pac-West will contact its Customer to determine if repairs
               were completed and confirm the trouble no longer exists.

     6.2.13    U S WEST and Pac-West shall mutually develop escalation
               procedures to be followed if, in Pac-West judgment, any
               performance standard defined in this Agreement is not met for any
               individual trouble report. The escalation procedures to be
               provided shall include names and telephone numbers of U S WEST
               management personnel who are responsible for maintenance issues
               and who will be contacted when a trouble condition is escalated.

     6.2.14    In the event U S WEST shall fail to conform to any specified
               performance and service quality standards, identified elsewhere
               in this Agreement, U S WEST shall perform and deliver to
               Pac-West, a standard root cause analysis of the reasons for U S
               WEST's failure to conform, and U S WEST shall correct said cause
               as soon as possible, at its own expense.

     6.2.15    Dispatching of U S WEST technicians to Pac-West Customer premises
               shall be accomplished by U S WEST pursuant to a request received
               from Pac-West. Pac-West shall be able to schedule maintenance
               appointments in intervals at parity with U S WEST upon opening of
               trouble report.

     6.2.16    [intentionally left blank for numbering consistency]

     6.2.17    U S WEST shall supply Pac-West with a unique number to identify
               each Pac-West initial trouble report opened.

               6.2.17.1 U S WEST and Pac-West agree to a trouble priority and
               severity coding format for all trouble reports handled between
               the two companies. Troubles are prioritized according to
               appointment schedules:

                  6.2.17.1.1 Priority 1 = Out of Service
                  6.2.17.1.2 Priority 2 = Affecting Service
                  6.2.17.1.3 Priority 3 = Feature Trouble

               6.2.17.2 Customer has the ability to escalate.

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<PAGE>

              6.2.18  U S WEST shall provide for resale any
                      maintenance/protection plans for services offered under
                      this Agreement to Pac-West that it offers U S WEST's own
                      Customers.

              6.2.19   U S WEST's current trouble reporting system does not
                       provide the capability to reopen a closed trouble report.
                       Therefore, U S WEST shall allow Pac-West to designate
                       that a trouble report is associated with the initial
                       trouble report which was closed in the past twenty-four
                       (24) hours without repairs being performed to the
                       Customer's satisfaction. U S WEST shall measure the
                       frequency of these types of repeated reports and will
                       demonstrate non-discriminatory treatment to Pac-West.

              6.2.20   Additional Unbundling Requirements

                       6.2.20.1 When trouble is reported by a Customer served
                                through unbundled Network Elements, Pac-West
                                will test its network to identify any problems.
                                If no problems are identified with the Pac-West
                                network, Pac-West will open a trouble report
                                with U S WEST and provide switch-based test
                                results to the U S WEST technician. U S WEST
                                shall then test its portion of the network and
                                perform repairs as required in the time frames
                                set forth below in this Attachment.

                                 6.2.20.1.1 If US WEST tests the unbundled loop
                                 and there is no trouble found ("NTF"), the same
                                 shall be reported back to Pac-West. If, upon
                                 testing the unbundled loop, the trouble is
                                 isolated to the Customer side of the NID
                                 (inside wire, CPE, etc.), Pac-West shall be
                                 billed a trouble isolation charge ("TIC"). If,
                                 after Pac-West has opened a trouble ticket, it
                                 cancels the trouble ticket before a U S WEST
                                 technician has been dispatched on the trouble,
                                 no charges will apply. If the U S WEST
                                 technician has been dispatched on the reported
                                 trouble before the trouble ticket is canceled
                                 by Pac-West, a TIC will be applied.

                                 6.2.20.1.2 Pac-West will coordinate combined
                                 testing or repair activities until trouble is
                                 resolved. U S WEST shall provide repair updates
                                 to Pac-West. For trouble isolation both Parties
                                 will cooperatively test to isolate the trouble
                                 as required.

6.3 Systems Interfaces and Information Exchanges

              6.3.1    U S WEST shall cooperate with Pac-West to establish a
                       real-time, electronic interface to U S WEST's maintenance
                       systems and databases. This system shall be based on
                       existing and future uniform industry standards being
                       worked in T1M1 standards committee and Electronics
                       Communications Implementation Committee ("ECIC") industry
                       forum.

                       6.3.1.1  An electronic bond will be a system to system
                                connection with immediate update capability. In
                                no way shall this interface cause Pac-West
                                personnel to use U S WEST systems via remote
                                hook up or any other means of access.

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<PAGE>

         6.3.1.2  This interface shall allow Pac-West personnel to perform the
                  following functions for Pac-West Customers: (a) enter trouble
                  reports in the U S WEST maintenance systems for an Pac-West
                  Customer; (b) retrieve and track current status on all
                  Pac-West Customer trouble report-, (c) receive "estimated time
                  to repair" (ETTR) on a real-time basis; (d) receive immediate
                  notification in the event a repair person is unable to be
                  present for, or anticipates missing, a scheduled repair
                  appointment; (e) retrieve all time and material charges that
                  apply to Pac-West at the time of ticket closure (itemized by
                  time spent, price of materials used, procedures employed,
                  amounts incurred in each such category, and total by Customer,
                  per event; and (f) receive automated notification of case
                  closure.

         6.3.1.3  Automated interfaces must be provided into a centralized
                  operations support systems database for real time network
                  monitoring to proactively identify potential service
                  degradation. Such systems must monitor and report on the
                  integrity of the U S WEST network, isolate trouble and, where
                  applicable (e.g., when an unbundled loop is connected to an
                  unbundled port or when an unbundled loop includes such
                  equipment as DCS, D4, etc.) initiate repair operations, test
                  individual unbundled loops and generate maintenance and repair
                  notices that impact any end user's ability to complete calls.
                  Ongoing maintenance practices on such unbundled loops must be
                  equal to or exceed the practices employed by US WEST for
                  facilities used to provide Services for Resale.

         6.3.1.4  U S WEST agrees to develop and implement, as soon as possible,
                  with a target date to be mutually agreed upon by Pac-West and
                  U S WEST, the electronic interfaces described above.

6.3.2    U S WEST agrees that Pac-West may report troubles directly to a single
         U S WEST Repair/Maintenance Center for both residential and business
         Customers. The Repair Center will have two separate numbers, one for
         residence and one for business. Pac-West's Customers will be treated in
         the same manner as U S WEST Customers.

6.3.3    U S WEST shall perform all testing for Resale Services. U S WEST shall
         provide the capability for Pac-West to receive MILT test results while
         Pac-West customer is on line during the initial trouble report, when
         technically feasible in the U S WEST network.

         6.3.3.1  U S WEST shall provide test results to Pac-West, if
                  appropriate, for trouble clearance. In all instances, U S WEST
                  will provide Pac-West with the disposition of the trouble.

6.3.4    U S WEST shall provide to Pac-West the ability to obtain the status on
         open maintenance trouble reports via telephone or by another interface
         as agreed to by the Parties. U S WEST agrees to provide the status of
         residence and small business trouble reports upon Pac-West request.

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<PAGE>

             6.3.5    U S WEST agrees to provide to Pac-West the status for open
                      maintenance trouble reports for large business Customers
                      anytime the status of the trouble report changes or upon
                      Pac-West request.

             6.3.6    U S WEST agrees that Pac-West may call U S WEST to verify
                      central office features and functions as they relate to an
                      open trouble report. U S WEST agrees to work with Pac-West
                      on the initial trouble report to isolate the cause of the
                      trouble and, where possible, resolve the feature/function
                      related trouble at that time.

             6.3.7    U S WEST agrees to proactively advise Pac-West of any
                      central office failure that is known at the time of any
                      inquiry or trouble report. U S WEST agrees to continue to
                      work with Pac-West toward implementing a process to meet
                      Pac-West requirements for notification of switch failures
                      as soon as possible.

             6.3.8    U S WEST agrees to provide an Estimated Time To Repair
                      (ETTR) on all residence and small business trouble
                      reports.

             6.3.9    U S WEST agrees to develop, with Pac-West's cooperation,
                      mutually acceptable workcenter interface agreements to
                      document methods and procedures for interim and final
                      interfaces for each service within (30) thirty days after
                      Pac-West notice to U S WEST of its initiation of that
                      service.

                      6.3.9.1  After the initial deployment of the workcenter
                               processes, U S WEST agrees to continue working
                               with Pac-West to further develop, improve and
                               refine the operational process described in this
                               Agreement.

              6.3.10  U S WEST agrees to provide Pac-West with repair history of
                      previous trouble reports on customer service of open
                      trouble report.

              6.3.11  US WEST shall provide Pac-West with the capability to
                      cancel a trouble report.

              6.3.12  U S WEST shall provide Pac-West with the capability to
                      modify a trouble report.

6.4 Standards

              6.4.1   Maintenance charges for premises visits by U S WEST
                      employees or contractors shall be billed by Pac-West to
                      its Customer.

                      6.4.1.1   U S WEST employees or contractors shall present
                                the Customer with an Pac-West provided,
                                Pac-West-branded form detailing the time spent,
                                the materials used and an indication that the
                                trouble has either been resolved, or that
                                additional work will be necessary in accordance
                                with the provisions of this Agreement

                      6.4.1.2   If additional work is required, U S WEST
                                employees or contractors shall call Pac-West
                                from the Customer premises so that Pac-West can
                                schedule a new appointment with U S WEST and
                                Customer at the same time.

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<PAGE>

                  6.4.2    U S WEST agrees to work with Pac-West to support
                           expeditious development of an industry standard
                           trouble report entry format and agrees to implement
                           such standard within sixty (60) days after final
                           resolution by the Network Operation Forum (NOF).

     6.5 Performance Measurements and Reporting

              6.5.1 Cycle Time Measurements

                           [intentionally left blank for numbering consistency]

7.   Miscellaneous Services and Functions

     7.1 [intentionally left blank for numbering consistency]

     7.2 [Intentionally left blank for numbering consistency]

     7.3 Performance Measurements and Reporting

              7.3.1    [intentionally blank for numbering consistency](9)

              7.3.2    [intentionally blank for numbering consistency](10)

              7.3.3    Pac-West may, at its discretion, further request
                       additional and/or modified reporting as business needs
                       demand.

----------

9      Procedural Order, July 14, 1997, pages 19-20.

10     Procedural Order, July 14, 1997, pages 19-20.

                                       55
<PAGE>

                                                                  Attachment 6

        INTERFACE REQUIREMENTS FOR PRE-ORDERING, ORDERING, PROVISIONING,
                      MAINTENANCE AND REPAIR, AND BILLING

                                    PURPOSE
                                    -------

1.       Purpose

         1.1      This Attachment 6 sets forth the interface requirements for
                  pre-ordering, ordering and provisioning, maintenance and
                  repair, and billing, where Pac-West provides service to its
                  customers through resale of U S WEST Local Services or through
                  the use of Unbundled Network Elements and Combinations.

2.       Use of Standards

         2.1      As described below, Pac-West and U S WEST agree to implement
                  each interface described below based upon existing and
                  evolving industry standards or as mutually agreed upon. The
                  Parties shall transition the electronic interfaces to industry
                  standards within a time frame mutually agreed to.

3.       Reimbursement

         3.1      Reimbursement for operational interfaces shall be as
                  determined by the appropriate regulatory agency as set forth
                  in this Agreement.

4.       Scope

         4.1      This Attachment addresses the real-time transaction-based
                  protocols and transport networks that will be used to exchange
                  information for:

                  o        Preorder/Ordering/Provisioning for Service Resale
                           (SR) and Customer Specific Unbundled Network Elements
                           (UNEs)
                  o        Maintenance/Repair for SR and UNEs

                  It also addresses the batch protocols and transport networks
                  that will be used to exchange information for:

                  o        Recorded Customer Usage for SR and UNE
                  o        Wholesale Billing for SR and LINE
                  o        Recorded Usage Receivables for LINE
                  o        Local Account Maintenance for SR and UNE
                  o        Directory Assistance Database

         The preceding list of information to be exchanged is intended to be
         exemplary and does not represent a comprehensive list of such
         information to be exchanged between the parties.

         4.2      Pac-West and U S WEST will use at least one method of
                  exchanging preorder information which will be real-time
                  transaction-based. Pac-West and U S WEST may also assess and
                  determine the arrangements and conditions to support Batch
                  file transmittal for certain types of preorder information
                  related to the Street

                                       1
<PAGE>

                  Address Guide and Switch/Feature/Facility availability.

5.       System Interfaces

         5.1      For Pre-order, Order and Provisioning, an exchange protocol,
                  such as that based upon a subset of Common Management
                  Interface Protocol (CMIP) transactions referred to as
                  Electronic Communications-Lite (EC-Lite), will be used to
                  transport Electronic Data Interchange (EDI) formatted content.
                  Pac-West and U S WEST will use a TCP/IP based transport
                  network for the exchange of EDI transactions. Pac-West and U S
                  WEST will translate ordering and provisioning requests from
                  the Ordering and Billing Forum (OBF) forms into EDI
                  transactions using mutually agreed to mappings. The Service
                  Order SubCommittee (SOSC) of the Telecommunications Industry
                  Forum/Electronic Data Interchange (TCIFIEDI) committee
                  interpretations of the 850, 855, 860, 864, 865, 870, and 977
                  transactions, in accordance with the OBF forms, will be used
                  to convey all the necessary data to connect, modify or
                  disconnect local exchange services.

         5.2      For Maintenance and Repair, the CMIP transactions referred to
                  as Electronic Bonding - Trouble Administration (EB-TA) will be
                  used. Pac-West and U S WEST will use an X.25 transport network
                  which is the currently defined standard.

         5.3      For Billing, Pac-West and U S WEST will use EDI 811 and OBF
                  Billing Output Specification (BOS) formats via CONNECT:Direct.
                  Section 13 further defines the conditions when one or the
                  other format will be used.

         5.4      For Local Account Maintenance (LAM), Pac-West and U S WEST
                  agree to use CONNECT:Direct.

         5.5      For Directory Assistance Database Information, Pac-West and U
                  S WEST agree to use a batch protocol and transport network
                  that is yet to be determined and will be addressed in the
                  Joint Implementation Agreement (JIA) described in Section 18
                  of this Attachment.

         5.6      Modifications to OBF forms that are required due to the
                  absence of, or existence of unnecessary data fields, contents,
                  or formats will be addressed in the Joint Implementation
                  Agreement described in Section 18 of this Attachment ("JIA") .

6.       Real Time Performance

         6.1      The pre-order real time interface will support the Pac-West
                  customer contact as executed within Pac-West's Sales and
                  Service Centers. Gateway-to-gateway query-response cycle time
                  performance requirements will be specified as part of the
                  Joint Implementation Agreement described in Section 18 of this
                  Attachment.

         6.2      The transaction response time U S WEST provides to Pac-West
                  Sales and Service Center will be equal in quality with that
                  which U S WEST provides to itself or other telecommunications
                  carriers. For purposes of this Attachment, U S WEST agrees to
                  provide Pac-West benchmarking information for end-user
                  performance based on transaction volumes (nominal - light
                  volume, standard - typical volume, and worst case - heavy
                  volume) Pac-West. Pac-West may request an improvement in the
                  transaction response time U S WEST provides to Pac-West's
                  Sales and Service Center above that which U S WEST provides to

                                       2
<PAGE>

                  itself or other telecommunications carriers through the Bona
                  Fide Request process (as that process is defined in the Part A
                  of this Agreement) should cycle times not meet Pac-West's
                  business requirements.

7.       Compliance with Industry Standards

         7.1      Pac-West and U S WEST agree to discuss the modification of
                  these interfaces based upon evolving standards (e.g., data
                  elements, protocols, transport networks, etc.) and guidelines
                  issued by or referenced by relevant Alliance for
                  Telecommunication Industry Solution (ATIS) committees.
                  Establishment of new, or changes to, industry standards and
                  guidelines will be reviewed on no less than an annual basis
                  commencing on the Effective Date of this Agreement. This
                  review will consider standards and guidelines that have
                  reached final closure as well as those published in final
                  form. Both parties agree to evaluate evolving standards and
                  mutually determine the relevant modification to be implemented
                  based upon the latest approved version adopted or the latest
                  version reflecting final closure by the relevant (ATIS)
                  committee or subcommittee. The parties will use reasonable
                  effort to reach closure upon the necessary changes within no
                  more than three (3) months of initiating each review and to
                  implement the changes within nine (9) months or earlier, if
                  reasonably possible, unless there is mutual agreement to a
                  different implementation schedule.

         7.2      In the course of establishing operational ready system
                  interfaces between U S WEST and Pac-West to support Local
                  Service delivery, Pac-West and U S WEST may need to define and
                  implement system interface specifications that are
                  supplemental to existing standards. Where mutually agreed to,
                  Pac- West and U S WEST will submit such specifications to the
                  appropriate standards committee and will work towards its
                  acceptance as a standard.

8.       Scheduled Availability

         8.1      Pac-West and U S WEST will agree to an operational/production
                  readiness plan as soon as possible with a target date as
                  mutually agreed to by the Parties(1) for the delivery of all
                  systems interfaces described within this document, with the
                  mutual understanding that (1) product delivery content is
                  dependent on requirements definition and the time required to
                  develop to these requirements and (2) operational readiness is
                  dependent upon satisfactory test results for the transaction
                  volumes projected by Pac-West. Pac-West and U S WEST agree to
                  work to mutually identify, prioritize and track those
                  functions which may need to be positioned in a subsequent
                  systems interface delivery. These functions will be jointly
                  reviewed to define the time frame for development of
                  subsequent releases of the system interfaces and establish
                  mutually agreeable delivery dates.

         8.2      Pac-West and U S WEST agree that project schedules, timelines,
                  milestone deliverables, reporting processes, among others,
                  will be specified in the Joint Implementation Agreement
                  (Section 18). These schedules and deliverables will be
                  reviewed and revised as needed as part of regularly scheduled
                  meetings conducted throughout the development/implementation
                  cycle.

----------

1         Arizona Bench Order, May 28, 1997 Hearing, p. 1508.

                                       3
<PAGE>

9.       Pre-Order

         9.1      The Parties agree that the exchange of preordering information
                  for resale services and for services provided using UNEs will
                  be transmitted over the same interface.

         9.2      Pac-West and U S WEST will establish a transaction-based
                  electronic communications interface based upon the most
                  current (as of the Effective Date of this Agreement) version
                  of the Service Order Subcommittee (SOSC) implementation
                  guideline for Electronic Data Interchange (EDI). An exchange
                  protocol, such as Electronic Communications-Lite (EC-Lite)
                  will be used to transport EDI formatted content necessary to
                  perform inquiries including but not limited to:
                  switch/feature/facility availability, address verification,
                  telephone number assignment, appointment scheduling, and
                  customer service record requests. Without limiting other
                  restrictions which may apply, customer service records are
                  provided for the limited purpose of supporting the resale of
                  US WEST local exchange services by Pac-West or the sale of
                  unbundled elements on behalf of that Customer. The use of
                  records in a manner not associated with the ordering process,
                  is expressly forbidden, and is a violation of the terms of
                  this Agreement.

10.      Order and Provisioning

         10.1     When Pac-West is the customer of record for the resold local
                  exchange service(s), the exchange of information relating to
                  the ordering and provisioning of local exchange service will
                  be based upon the American National Standards Institute (ANSI)
                  Accredited Standards Committee (ASC) X12 Standards as
                  documented by the SOSC of the Telecommunications Industry
                  Forum/Electronic Data Interchange (TCIF/EDI) committee. The
                  Implementation Guidelines for Electronic Data Interchange EDI
                  Guidelines Customer Services Issue 7 will be used as a
                  baseline for implementation despite the fact that this
                  document may not have reached final approval stage by the
                  Effective Date of this Agreement. An exchange protocol, such
                  as EC-Lite will be used to transport EDI formatted content.
                  The information exchange will be forms-based, using Local
                  Service Request (LSR) Form, End User Information Form, and the
                  Resale Service Form developed by the OBF as specified in the
                  August 1996 version of the OBF forms in Bellcore SIR STS-471
                  OXX, and for Directory Listings, included with a local service
                  request, as specified in SR STS-471102.

         10.2     The end-user specific UNE order will be based upon OBF LSR
                  forms. The applicable SOSC implementation guidelines described
                  previously also apply to the End-user Specific Provisioning
                  LINE orders. U S WEST and Pac-West agree that the information
                  exchange will be forms-based using the Local Service Request
                  Form, End User Information Form, Loop Service Form (which may
                  ultimately be renamed the Loop Element form) and Port Form
                  (which may ultimately be renamed the Switch Element Form)
                  developed by the OBF. Enduser-specific Network Elements, or
                  Combinations thereof, to be supported in UNE orders shall be
                  as permitted in this Agreement for unbundled Network Elements
                  and subject to FCC and state regulatory requirements.

          10.3    Subject to regulatory direction or mutual agreement relative
                  to the requirement of providing combinations of UNE
                  components, Pac-West and U S WEST will

                                       4
<PAGE>

                  establish a method to relate, track and process as a single
                  entity the individual U S WEST-provided End-user-specific UNE
                  components specified at the time of the initial order.

         10.4     Pac-West and U S WEST will use the same transaction-based
                  protocol, such as EC-Lite, and transport network specified for
                  service resale for End-user specific UNE orders.

         10.5     The ordering of common use (non-end-user-specific) UNEs, as
                  may be permitted under this Agreement for unbundled elements
                  and subject to FCC and state regulatory requirements, will be
                  supported by a process separate from that described in the
                  preceding paragraphs for end-user-specific UNEs, such system
                  to be the same or similar to the mechanized process used for
                  trunk service requests or another process or system as
                  appropriate and determined by mutual agreement. Unless U S
                  WEST is otherwise required by Pac-West, this process will not
                  employ the electronic interfaces specified in this Attachment,
                  unless modified by separate agreement. U S WEST will support,
                  if and to the extent required by law, this Agreement or as
                  mutually agreed to, Interconnection and operation of
                  End-user-specific UNEs used in combination with common use
                  UNEs. The systems and ordering process as outlined herein is
                  separate and apart from the Bona Fide Request process agreed
                  to by the parties. The Joint Implementation Agreement (Section
                  18 of this Attachment 6) will address the details related to
                  defining a mechanism to correlate End-user-specific UNE orders
                  placed via system interfaces with Common Use UNEs that may
                  have been previously ordered.

         10.6     U S WEST will accept an 860 transaction that contains the
                  complete refresh of the previously provided order information
                  (under the original 850 transaction) simultaneously with the
                  delivery of supplemental (new/revised) information from
                  Pac-West, subject to mutually agreed upon business rules. This
                  treatment with respect to the 860 transaction will be accepted
                  by both parties until the SOSC explicitly clarifies the
                  information exchanges associated with supplementing orders, or
                  Pac-West and U S WEST mutually agree to change the treatment.

11.      Maintenance and Repair

         11.1     The exchange of maintenance and repair information, for both U
                  S WEST retail local exchange services to be resold by Pac-West
                  and for services Pac-West provides using a U S WEST UNE or
                  combinations of U S WEST UNEs, will be transmitted over the
                  same interface.

         11.2     For the purpose of exchanging fault management information,
                  Pac-West and U S WEST will establish an electronic bonding
                  interface, based upon ANSI standards T1.227-1995 and
                  T1.228-1995, and Electronic Communication Implementation
                  Committee (ECIC) Trouble Report Format Definition (TRFD)
                  Number 1 as defined in ECIC document ECIC/TRA/95-003, and all
                  standards referenced within those documents. The parties will
                  use the functions currently implemented for reporting access
                  circuit troubles. These functions include, but are not limited
                  to: Enter Trouble, Request Trouble Report Status, Add Trouble
                  Information, Modify Trouble Report Attributes, Trouble Report
                  Attribute Value Change (AVC) Notification and Cancel Trouble
                  Report, all of which are fully explained in ANSI
                  T1.227/T1.228-1995. Additional functions not currently

                                       5
<PAGE>

                  implemented by the parties or defined by the standards may be
                  supported by mutual agreement (e.g. Test Access and Trouble
                  History).

         11.3     Modifications that are required due to the absence of, or
                  existence of unnecessary data fields, contents, or formats
                  will be addressed in the Joint Implementation Agreement (JIA)
                  described in Section 18 of this Attachment 6.

12.      Recorded Customer Usage

         12.1     U S WEST will record the mutually agreed upon Customer usage
                  data that Pac-West requires for its retail local service
                  Customers. The content of such data will be based upon a
                  mutually agreeable interpretation of the BellCore Exchange
                  Message Record (EMR) format to be documented within the JIA. U
                  S WEST will provide electronic transmission of the recorded
                  data using CONNECT:Direct daily on Monday through Friday on a
                  schedule to be determined in the Joint Implementation
                  Agreement (excluding holidays). This interface and format will
                  be used to deliver recorded usage when Pac-West is reselling
                  retail local exchange services of U S WEST and when usage is
                  associated with Customers served by Pac-West through one or
                  more UNEs provided by U S WEST. Pac-West and U S WEST will
                  mutually agree upon the conditions when Customer usage data
                  recording will be provided on behalf of Pac-West.

13.      Billing Format for Service Resale (SR) and Unbundled Network Elements
         (UNE) Payables

         13.1     Billing information for unbundled loop and port elements that
                  are flat-rated will be provided in a single EDI 811 format
                  across all U S WEST regions via Connect:Direct. Billing
                  information for unbundled trunks/interoffice transport
                  elements that are flat-rated will be provided in a BOS format
                  via Connect:Direct and will appear in the Customer Service
                  Record of the facility bill. Billing information for SR
                  products and services that are flat rated will be provided in
                  a single EDI 811 format across all U S WEST regions via
                  Connect:Direct. Exceptions include, but are not limited to,
                  frame relay which will be provided in a BOS format via
                  Connect:Direct. The display of rating codes and the associated
                  charge will be mutually agreed upon in both formats. Charges
                  associated with a specific loop will reflect the circuit ID
                  format.

         13.2     For usage-rated billing, U S WEST will issue bills to Pac-West
                  for SR/UNE in the formats described under the flat-rated
                  SR/UNE billing section. Usage-rated billing for SR/UNE will be
                  uniquely identified and displayed in the Usage Sections of the
                  bill. For products using BOS format, jurisdiction will be
                  specified per BOS guidelines. Conversation time, by chargeable
                  traffic type, will be displayed and billed per applicable
                  tariffs. Delivery of usage-rated SR/UNE bills will be provided
                  as described under the flat-rated SR/UNE billing section.

         13.3     UNEs which U S WEST agrees to provide, under the terms and
                  conditions of the Agreement, or to the extent required by law,
                  that are recombined as a single service, will be grouped
                  together by U S WEST and displayed together on the bill.

14.      Recorded UNE Local or Access Usage Receivables

          14.1    U S WEST will record all agreed upon originating and
                  terminating usage billed to

                                       6
<PAGE>

                  and associated with a LINE provided by U S WEST to Pac-West.
                  The usage recorded will be in the same BellCore Exchange
                  Message Record format discussed within Section 12 and will be
                  subject to the same terms and conditions for modification
                  and/or replacement of the format as discussed in Section IX.

         14.2     Pac-West and U S WEST will mutually agree upon the Local and
                  Long Distance access customer usage data recording that U S
                  WEST will provide to Pac-West consistent with FCC and State
                  regulatory guidelines and requirements, so that Pac-West may
                  bill other carriers for the local and exchange access usage
                  charges to which Pac-West is entitled, if any. Pac-West and U
                  S WEST will perform mutually agreeable systems testing, as
                  documented in the Joint Implementation Agreement (Section 18),
                  on a date to be mutually agreed to by Pac-West and U S WEST(2)

         14.3     U S WEST will provide electronic transmission of the recorded
                  usage using CONNECT:Direct daily on Monday through Friday on a
                  schedule to be determined in the Joint Implementation
                  Agreement (excluding holidays). The same or similar interface
                  used for delivery of recorded customer usage, discussed in
                  Section 12, will be used for delivery of the recorded usage
                  discussed in this section.

15.      Local Account Maintenance

         15.1     When acting as the switch provider for Pac-West, where
                  Pac-West either is reselling retail services of U S WEST or
                  employing UNEs to provide local service, U S WEST will notify
                  Pac-West whenever the local service Customer transfers service
                  from Pac-West to another local service provider. U S WEST will
                  provide this notification via CONNECT:Direct using a mutually
                  agreeable 4-digit Local Use Transaction Code Status Indicator
                  (TCSI) that will be used to indicate that the retail customer
                  is terminating local service with Pac-West. This notice will
                  be provided on the next processing day after implementing the
                  transfer, where processing days are Monday through Friday
                  (excluding holidays). The TCSI, sent by U S WEST, will be in
                  the 960 byte industry standard CARE record format.

         15.2     Pac-West and U S WEST will process account changes that affect
                  only the presubscribed intraLATA and/or interLATA toll
                  provider (PIC) via a change service order form using the same
                  EC-Lite transaction based protocol and transport network
                  employed for ordering resale service as specified in Section
                  10.

         15.3     When appropriate regulatory guidelines exist, U S WEST will
                  use the industry standard CARE message TCSI 3148 to reject an
                  IXC initiated change of the Primary Interexchange Carrier
                  (PIC), where U S WEST is the switch provider either for the
                  retail local services of U S WEST that Pac-West resells or
                  UNEs of U S WEST that Pac-West employs in providing service.

         15.4     Agreement by U S WEST and Pac-West to the Local Account
                  Maintenance described above does not, in any way, set a
                  precedence or remove any obligation for U S WEST and Pac-West
                  to work towards an industry solution for supporting customer
                  movement between and among other ILECs and CLECs.

----------

2         Id.

                                       7
<PAGE>

16.      Directory Assistance Database

         16.1     Pac-West and U S WEST will use a batch protocol and transport
                  network to exchange Directory Assistance Database information
                  similar to existing U S WEST listings products (i.e., DA EUSL,
                  DA EUSL Updates). The specific protocol and transport network
                  to be used has not been determined or mutually agreed to and
                  will be specified in the JIA.

         16.2     Without limiting other restrictions which may apply, directory
                  service Listing products are provided for the limited purpose
                  of supporting provision of services as outlined in this
                  Agreement. The use of Listings in a manner not associated with
                  this use, is expressly forbidden, and is a violation of the
                  terms of this Agreement.

17.      Testing and Acceptance

         17.1     The Parties will test the interfaces developed under this
                  Attachment. The intent of the end-to-end integrity testing is
                  to establish, through the submission and processing of test
                  cases, that transactions agreed to by Pac-West and U S WEST
                  will successfully process, in a timely and accurate manner,
                  through both parties' supporting OSS as well as the
                  interfaces. Irreconcilable differences regarding the
                  interpretation of operational status of the interfaces will be
                  handled through the Dispute Resolution Process as defined in
                  Section 27 of Part A of this Agreement.

         17.2     An interoperability testing suite shall ensure the
                  implementation of functions, capabilities, and acceptance
                  criteria enumerated in the JIA, with both Parties agreeing to
                  resolve any material defects in the software.

         17.3     The test process shall include a series of tests in which the
                  transactions, representative of the predominant business
                  transactions associated with local customer servicing, are
                  performed side-by-side using the mediated access gateway
                  interface to U S WEST Legacy systems and the Legacy system
                  interface utilized by U S WEST service representatives and
                  repair attendants. The purpose of this series of tests will be
                  to verify that the performance and response times visible to a
                  user of the mediated access gateway for nominal and worst case
                  scenarios with the same level of quality in accordance with
                  the Act.

         17.4     U S WEST does not warrant that its systems and access to those
                  systems will be error-free.

         17.5     Products and services already billed via the Integrated Access
                  Billing System (IABS) will be included in the existing
                  pre-bill certification process for general availability and a
                  re-certification process conducted in accordance with current
                  practices. For products and services billed outside of IABS,
                  the parties will work towards establishing a mutually agreed
                  upon pre-bill certification process.

         17.6     Pac-West and U S WEST agree that metrics are required in order
                  to monitor the performance and assure the on-going delivery of
                  non-discriminatory access to U S WEST systems for
                  pre-order/ordering/provisioning, maintenance/repair, billing,
                  and Directory Assistance databases. A performance measurement
                  plan that addresses the definition, measurement, and review of
                  quality, timeliness,

                                       8
<PAGE>

                  accuracy and availability of each interface and associated
                  transactions or files will be jointly developed and documented
                  within the JIA for each interface.

         17.7     Pac-West and U S WEST agree to periodic status meetings to
                  review the overall progress toward introducing fully
                  operational interfaces capabilities, on a date to be mutually
                  agreed to by Pac-West and U S WEST(3)

         17.8     Results of testing shall be considered Confidential
                  Information, except that such results may be provided pursuant
                  to this Agreement and law.

18.      Joint Implementation Agreement Development

         18.1     Pac-West and U S WEST recognize that the preceding provisions
                  are not sufficient to resolve all, technical and operational
                  details related to the interfaces described. Therefore,
                  Pac-West and U S WEST agree to document the additional,
                  technical and operational details in the form of a Joint
                  Implementation Agreement (JIA). The purpose of the JIA is to
                  establish the working details of the systems interfaces
                  between the two parties, and as such, they will not be
                  submitted to the Commission for approval as amendments to this
                  Agreement. These JIA may be modified, by mutual agreement,
                  over the life of the Agreement without subjecting the balance
                  of the Agreement to renegotiation or modification.

         18.2     Both parties further agree that any technical, operational or
                  implementation issues directly associated with the systems
                  interfaces, once identified at the working team level, may be
                  escalated by the initiative of either party thirty (30) days
                  after an issue is identified. The escalation will proceed
                  first to the senior management of both companies who will seek
                  to resolve the issue. Within fourteen (14) days of the
                  Effective Date of this Agreement, Pac-West and U S WEST will
                  document the agreed upon escalation process including the
                  names and contact information of responsible senior
                  management. If an issue is not resolved within thirty (30)
                  days following receipt of the issue by senior management,
                  either party may submit the issue to the Alternative Dispute
                  resolution process contained in Section 27 of Part A of this
                  Agreement.

         18.3     Pac-West and U S WEST will document an overall project
                  implementation schedule within sixty (60) days of the
                  Effective Date of this Agreement. This schedule will be
                  mutually binding and can be modified by mutual consent.

         18.4     In addition, Pac-West and U S WEST agree to document both a
                  topical outline for the JIA, and establish a schedule for
                  identifying, discussing, resolving and documenting resolution
                  of issues related to each aspect of the JIA topical outline
                  for each interface discussed in this document. In no case will
                  either end-to-end integrity testing or load testing begin
                  without both parties mutually agreeing that each interface JIA
                  documents the intended operation of the interface scheduled
                  for testing. In the event the parties cannot agree prior to
                  one hundred and twenty (120) days of the
                  operational/production readiness date for delivery of all
                  system interfaces described within this Attachment, disputes
                  over the sufficiency of documentation will be submitted to
                  arbitration pursuant to the Alternative Dispute Resolution
                  process contained in Section 27 of Part A of this Agreement.

----------

3         Id.

                                       9
<PAGE>

18.5     By mutual agreement, specific paragraphs or entire sections of this
         Agreement may be identified and documented to serve the purpose
         described for the Joint Implementation Agreement for specific
         interfaces. Any issues identified and subsequently resolved through
         either the end-to-end integrity or load testing processes will be
         incorporated into the impacted interface section of the JIA on a date
         to be mutually agreed to by Pac-West and U S WEST.

18.6     An illustrative outline for a JIA follows:

         o    Introduction
         o    Purpose of Joint Implementation Agreement
         o    Terms of Agreement
         o    "System" Interface
              o    Business Process and Data Requirements
              o    Overall Responsibilities
              o    Identification & Definitions of Activities

              o    Information To Be Provided Per Transaction

              o    Process Information for Each Activity & Transaction

         o    Delivery Criteria
              o    Data Standard
              o    Message Protocol
              o    Transmission Protocol
              o    Destination
              o    Frequency Of Data
              o    Deviations to Generic Specification
              o    Error Processing
              o    Process for Notification of Late Transmittals
              o    Escalation & Expedite Procedures
              o    Transaction Response Times
              o    File Format Specifications
              o    Rules for the Physical Interface
              o    File Structure
              o    Data Format
              o    Error Controls
              o    Physical Tape Specifications
              o    Site Information
              o    Contact Person
              o    Transmission Hours
         o    Testing
              o    Cooperative Testing
              o    Pairwise Testing
              o    ETE Testing
              o    Test Order ETE (Employees)
              o    Future Testing Requirements
         o  Interface Metrics
              o    Data Timeliness
              o    Data Completeness
              o    Data Accuracy
         o  Contact Information
              o    Contacts/Escalation Contacts
              o    Schedules for Center Operations (days/hours of Operation)
         o  Data Requirements

                                       10
<PAGE>

              o    Retention of Data
              o    Back-up and Recovery Procedures
              o    Disaster Recovery
              o    System Change Notification
              o    Guarding of Proprietary Data
         o  Reporting Information
              o    Reports to be Generated
              o    Frequency
              o    Data Requirements
              o    Transmission
         o  Change Control Process
         o  Issue Resolution Process
         o  Termination of Interface Notification

                                       11
<PAGE>

                                                                  Attachment 7

                            IMPLEMENTATION SCHEDULE

1.       Local Service Resale

         1.1      Within ninety (90) days of the Effective Date of this
                  Agreement U S WEST shall provide for resale all services
                  designated in this Agreement. Once service is initiated in an
                  area, the ordering and provisioning intervals will be as
                  specified in this Agreement and/or adopted by the Commission.

2.       Unbundled Network Platform (All Network Elements in Combination)

         2.1      Within one hundred and twenty (120) days of the Effective Date
                  of this Agreement, U S WEST shall offer all services, Network
                  Elements and any Combinations thereof designated in this
                  Agreement. Once service is initiated in an area, the ordering
                  and provisioning intervals will be as specified in this
                  Agreement and/or adopted by the Commission.

3.       Interconnection Trunking for Local Service

         3.1      Upon the Effective Date of this Agreement, within thirty (30)
                  days of a request by Pac-West for trunking to specific
                  locations, or such other time period as the Parties may
                  mutually agree, U S WEST shall provide interconnection trunk
                  groups necessary for the mutual exchange of traffic or
                  combined trunk groups as necessary or required for efficiency
                  and interconnection billing to locations specified by
                  Pac-West. Such thirty (30) day period shall apply only to the
                  provision of existing transmission facilities. Subsequent to
                  the thirty (30) day period following the Effective Date of
                  this Agreement, interconnection trunk orders shall be
                  processed as specified in this Agreement and/or adopted by the
                  Commission.(1)

4.       Ancillary Trunking

         4.1      Within ninety (90) days after the Effective Date of this
                  Agreement, U S WEST shall provide:

                  4.1.1    E-911 Trunking in cooperation with Pac-West;
                  4.1.2    SS7 Interconnection and Certification in cooperation
                           with Pac-West; and
                  4.1.3    Directory Listings Arrangements and Directory
                           Assistance Interconnection.

5.       Unbundled Loops

         5.1      Within sixty (60) days after Collocation has been provided
                  pursuant to the terms of this Agreement, U S WEST shall
                  provide unbundled loops at designated end offices. Subsequent
                  unbundled loops should be made available pursuant to ordering
                  intervals as specified in this Agreement and/or adopted by the
                  Commission.

6.       Collocation

         6.1      Collocation will be provided upon request pursuant to the
                  terms and conditions of this Agreement.

----------

1        Procedural Order, July 14, 1997, page 23.

                                       1
<PAGE>

7.       Access To Poles, Ducts and Rights of Way

         7.1      Access to Poles, Ducts and Rights of Way shall be provided
                  upon request, pursuant to the terms and conditions of this
                  Agreement.

8.       Interim Number Portability

         8.1      Interim Number Portability capabilities, as specified in this
                  Agreement, shall be made available in specified locations
                  ninety (90) days after the Effective Date and within
                  appropriate service order windows thereafter. Interim Number
                  Portability shall be capable of being ordered electronically
                  with a target date of December 1, 1997.

9.       Operational Support System

         9.1      Pac-West and U S WEST agree to an operational/production
                  readiness plan on a date to be mutually agreed to by Pac-West
                  and U S WEST(2).

----------

2        Arizona Bench Order, May 28, 1997 Hearing, p. 1508.<PAGE>

                                                                   Exhibit 10.34

                               =================

                            OFFICE LEASE AGREEMENT

                                BY AND BETWEEN

                         DAVID A. AND SANDRA L. SABEY,
                               husband and wife

                                   Landlord

                                      and

                           PAC WEST TELECOMM, INC.,
                           a California corporation

                                    Tenant
<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                         Page
                                                                                                         ----
<S>                                                                                                      <C>
1.   FUNDAMENTAL LEASE PROVISIONS; DEFINITIONS; EXHIBITS..............................................      1
     1.1        Broker................................................................................      1
     1.2        Building..............................................................................      1
     1.3        Premises..............................................................................      1
     1.4        Tenant's Share........................................................................      1
     1.5        Lease Year............................................................................      1
     1.6        Commencement Date.....................................................................      1
     1.7        Expiration Date.......................................................................      1
     1.8        Term..................................................................................      1
     1.9        Base Rent.............................................................................      1
     1.10       Early Occupancy.......................................................................      2
     1.11       Additional Rent.......................................................................      2
     1.12       Base Year.............................................................................      2
     1.13       Security Deposit......................................................................      2
     1.14       Parking...............................................................................      2
     1.15       Landlord's Payment Address............................................................      2
     1.16       Notice Addresses......................................................................      2
     1.17       Permitted Uses........................................................................      3
     1.18       Landlord's Work.......................................................................      3
     1.19       Tenant's Work.........................................................................      3
     1.20       Guarantor.............................................................................      3
     1.21       Exhibits..............................................................................      3

2.   PREMISES.........................................................................................      3
     2.1        Acceptance of Premises................................................................      3

3.   LEASE TERM.......................................................................................      4
     3.1        Duration of Lease Term................................................................      4
     3.2        Extension Option......................................................................      4
     3.3        Base Rent During Option Term..........................................................      5
     3.4        Confirmation of Commencement Date.....................................................      5
     3.5        Surrender of Premises.................................................................      5
     3.6        Holding Over Without Consent..........................................................      5

4.   RENT.............................................................................................      6
     4.1        Payment...............................................................................      6
     4.2        Interest on Late Payments; Late Charge................................................      6
     4.3        Address for Payments..................................................................      6

5.   SECURITY DEPOSIT.................................................................................      6

6.   USES; COMPLIANCE WITH LAWS.......................................................................      7
     6.1        Permitted Uses........................................................................      7
     6.2        Duties and Prohibited Conduct.........................................................      7
     6.3        Environmental, Health And Safety Laws.................................................      7

7.   SERVICES AND UTILITIES; REPAIRS AND MAINTENANCE..................................................      8
     7.1        Services and Utilities; Landlord's Obligations........................................      8
                7.1.1   Additional Services Or Utilities..............................................      8
     7.2        Services and Utilities; Tenant's Obligations..........................................      9
                7.2.1   Services and Utilities; Tenant's Options......................................      9
</TABLE>

                                       i
<PAGE>

<TABLE>
<S>                                                                                                      <C>
     7.3        Interruption..........................................................................    9
     7.4        Landlord's Repair and Maintenance Obligations.........................................    9
     7.5        Tenant's Repair and Maintenance Obligations...........................................    9

8.   ADDITIONAL RENT: OPERATING COSTS AND REAL ESTATE TAXES...........................................   10
     8.1        Definitions...........................................................................   10
                8.1.1   Taxes.........................................................................   10
                8.1.2   Operating Costs...............................................................   10
                8.1.3   Tenant's Share................................................................   11
     8.2        Payment of Additional Rent for Estimated Increases in Operating Costs and Taxes.......   11
     8.3        Actual Operating Costs and Taxes......................................................   11
     8.4        Determinations........................................................................   11
     8.5        Tenant's Personal Property Taxes......................................................   12
     8.6        Tenant's Utility Charges..............................................................   12

9.   IMPROVEMENTS AND ALTERATIONS.....................................................................   12

10.  ACCESS...........................................................................................   12

11.  DAMAGE OR DESTRUCTION............................................................................   13
     11.1       Damage and Repair.....................................................................   13
     11.2       Destruction During Last Year of Term..................................................   13
     11.3       Business Interruption.................................................................   13
     11.4       Tenant Improvements...................................................................   13
     11.5       Express Agreement.....................................................................   14

12.  WAIVER OF SUBROGATION............................................................................   14

13.  INDEMNIFICATION..................................................................................   14

14.  INSURANCE........................................................................................   15
     14.1       Liability Insurance...................................................................   15
     14.2       Property Insurance....................................................................   15
     14.3       Insurance Policy Requirements.........................................................   15

15.  ASSIGNMENT AND SUBLETTING........................................................................   15
     15.1       Assignment or Sublease................................................................   15
     15.2       Documentation and Expenses............................................................   16
     15.3       Transferee Obligations................................................................   16

16.  SIGNS............................................................................................   16

17.  LIENS............................................................................................   17

18.  BANKRUPTCY.......................................................................................   17
     18.1       Assumption of Lease...................................................................   17
                18.1.1   Definition of Adequate Assurances............................................   17
     18.2       Assignment of Lease...................................................................   17
     18.3       Adequate Protection...................................................................   18

19.  DEFAULT..........................................................................................   18
     19.1       Cumulative Remedies...................................................................   18
     19.2       Tenant's Default; Right to Cure.......................................................   18
     19.3       Landlord's Rights And Remedies........................................................   18
</TABLE>

                                       ii
<PAGE>

<TABLE>
<S>                                                                                                      <C>
                19.3.1   Termination of Lease.........................................................   18
                19.3.2    Re-entry of the Premises....................................................   18
                19.3.3   Termination After Reentry....................................................   18
     19.4       Landlord's Damages....................................................................   19
                19.4.1   Delinquent Rent..............................................................   19
                19.4.2   Rent After Termination Until Judgment........................................   19
                19.4.3   Rent After Judgment..........................................................   19
                19.4.4   Leasing Concessions..........................................................   19
                19.4.5   Other Compensation...........................................................   19
                19.4.6   Additional or Alternative Damages............................................   19
     19.5       Fixtures..............................................................................   20
     19.6       No Waiver.............................................................................   20
     19.7       Waiver of Notice......................................................................   20
     19.8       Waiver of Redemption Rights...........................................................   20
     19.9       Default by Landlord...................................................................   20

20.  SUBORDINATION AND ATTORNMENT.....................................................................   20

21.  REMOVAL OF PROPERTY..............................................................................   21

22.  CONDEMNATION.....................................................................................   21
     22.1       Entire Taking.........................................................................   21
     22.2       Constructive Taking of Entire Premises................................................   21
     22.3       Partial Taking........................................................................   22
     22.4       Awards and Damages....................................................................   22

23.  NOTICES..........................................................................................   22

24.  COSTS AND ATTORNEYS' FEES........................................................................   22

25.  LANDLORD'S LIABILITY.............................................................................   22

26.  LANDLORD'S CONSENT...............................................................................   22

27.  ESTOPPEL CERTIFICATES............................................................................   22

28.  RIGHT TO PERFORM.................................................................................   23

29.  PARKING..........................................................................................   23

30.  AUTHORITY........................................................................................   23

31.  GENERAL..........................................................................................   23
     31.1       Headings..............................................................................   23
     31.2       Heirs and Assigns.....................................................................   23
     31.3       No Brokers............................................................................   23
     31.5       Entire Agreement......................................................................   24
     31.6       Severability..........................................................................   24
     31.7       Force Majeure.........................................................................   24
     31.8       Right to Change Public Spaces.........................................................   24
     31.9       Governing Law.........................................................................   24
     31.10      Building Directory....................................................................   24
     31.11      Building Name.........................................................................   24
     31.12      Quiet Enjoyment.......................................................................   24
     31.13      Survival..............................................................................   24
     31.14      Lender's Consent......................................................................   24
</TABLE>

                                      iii
<PAGE>

                            OFFICE LEASE AGREEMENT

     THIS OFFICE LEASE AGREEMENT ("Lease") is made this _________ day of
____________, 1999 ("Effective Date"), between David A. and Sandra L. Sabey,
husband and wife ("Landlord"), and Pac West Telecomm, Inc., a California
corporation, ("Tenant"). The parties agree as follows:

     1.  FUNDAMENTAL LEASE PROVISIONS; DEFINITIONS; EXHIBITS.  The capitalized
terms set forth below in this Section 1 shall have the meanings provided in this
Section 1, unless otherwise specifically modified by provisions of this Lease.

         1.1  Broker.  "Broker" shall mean Partners National Real Estate Group,
Inc. A commission shall be paid by Landlord to Broker pursuant to a separate
agreement between Landlord and Broker.

         1.2  Building.  "Building" shall mean the structure commonly known as
International Gateway. The Building is situated on a portion of the real
property legally described in Exhibit A and has a postal address of 12201
Tukwila International Blvd., Tukwila, Washington 98168-2577. The Building
together with the real property described above shall constitute the "Property."

         1.3  Premises.  The "Premises" shall mean the space consisting of
approximately 16,851 net rentable square feet located on the second floor of the
Building and depicted on the floor plan attached to this Lease as Exhibit B,
subject to recalculation in accordance with Section 2. The Premises shall
include the Tenant Improvements, if any, described in Exhibit C.

         1.4  Tenant's Share.  "Tenant's Share" shall mean "Tenant's Share of
the Property". "Tenant's Share of the Property" shall mean twenty-four and
98/100th percent (24.98%), calculated by dividing the net rentable area of the
Premises by the net rentable area of the Building (approximately 67,433 net
rentable square feet. The Building load factor is ten and nine-tenths percent
(10.9%). In the event the rentable area of the Premises or Building is altered
or recalculated in accordance with Section 2, Landlord shall adjust Tenant's
Share of the Building to properly reflect such event. Landlord's adjustment of
such Tenant's Share shall be final.

         1.5  Lease Year.  "Lease Year" shall mean the twelve-month period
commencing January 1 and ending December 31.

         1.6  Commencement Date.  Subject to Section 3.1, "Commencement Date"
shall mean January 1, 2000 or the date Tenant occupies the Premises for use,
excluding construction and equipment installation, whichever is earlier. If
Sabey Construction Inc. is selected as the general contractor this Lease shall
commence upon dial tone service to the Premises or the date Tenant occupies the
Premises for use, excluding construction and equipment installation, whichever
is earlier. For the purposes of this Section 1.6, "dial tone service" shall mean
when Tenant has a switch connection for regular service to the optical cable
provider. Landlord is not responsible for specific performance by the optical
cable provider.

         1.7  Expiration Date.  "Expiration Date" shall mean the date that is
ten (10) years after the Commencement Date, unless sooner terminated or extended
in accordance with this Lease.

         1.8  Term.  "Term" shall mean a period of ten (10) years, commencing on
the Commencement Date and terminating on the Expiration Date, unless sooner
terminated or extended in accordance with this Lease.

                                       1
<PAGE>

         1.9  Base Rent.  "Base Rent" from the Commencement Date through the
thirty-sixth (36th) month of the Lease Term shall mean the net rentable square
feet multiplied by Eleven and 50/100 Dollars ($11.50) per square foot per year,
based on 16,851 net rentable square feet of Premises, (Sixteen Thousand One
Hundred Forty-eight and 88/100 Dollars ($16,148.88) per month). "Base Rent" from
the thirty-seventh (37th) month of the Lease Term through the sixtieth (60th)
month of the Lease Term shall mean the net rentable square feet multiplied by
Twelve and 75/100 Dollars ($12.75) per square foot per year, based on 16,851 net
rentable square feet of Premises, (Seventeen Thousand Nine Hundred-four and
19/100 Dollars ($17,904.19) per month). "Base Rent" from the sixty-first (61st)
month of the Lease Term through the ninety-sixth (96th) month of the Lease Term
shall mean the net rentable square feet multiplied by Thirteen and 50/100
Dollars ($13.75) per square foot per year, based on 16,851 net rentable square
feet of Premises, (Nineteen Thousand Three Hundred-eight and 44/100 Dollars
($19,308.44) per month). "Base Rent" from ninety-seventh (97th) month of the
Lease Term through the Expiration Date shall mean the net rentable square feet
multiplied by Fifteen and 50/100 Dollars ($15.50) per square foot per year,
based on 16,851 net rentable square feet of Premises (Twenty-one Thousand Seven
Hundred Sixty-five and 88/100 Dollars ($21,765.88) per month). Prior to the
Commencement Date, the net rentable square feet may be recalculated in
accordance with Section 2. Base Rent shall be payable as provided in Section 4.

         1.10 Early Occupancy.  Tenant will be allowed to occupy any square
feet they feel is ready for occupancy before the Commencement Date. Early
Occupancy shall mean any use of the space not directly related to the
installation of equipment or constructing the Premises. "Base Rent" will be
payable on the occupied net square feet and will be calculated by multiplying
the actual occupied rentable square feet by Eleven and 50/100 Dollars ($11.50)
per net rentable square foot on an annualized basis. Tenant will be responsible
for all "Additional Rent" as described in Section 8 on the portion of the space
that they occupy early.

         1.11 Additional Rent.  "Additional Rent" shall mean the amounts
described in Section 8 as Real Property Taxes, Personal Property Taxes,
Operating Costs, and all other amounts except Base Rent which are payable by
Tenant under this Lease.

         1.12 Base Year.  Intentionally Deleted

         1.13 Security Deposit.  "Security Deposit" shall mean Twenty-five
Thousand and 00/100 Dollars ($25,000.00). The Security Deposit shall be
deposited with Landlord in accordance with Section 5.

         1.14 Parking.  Subject to Section 29.

         1.15 Landlord's Payment Address.  "Landlord's Payment Address" shall
mean: David A. and Sandra L. Sabey c/o Sabey Corporation, P.O. Box 34108,
Seattle, Washington 98124-1108.

         1.16 Notice Addresses.

         If to Landlord: David A. and Sandra L. Sabey
                         c/o Sabey Corporation
                         101 Elliott Avenue W., Suite 330
                         Seattle, WA 98119
                         Attn.: Executive Vice President

         with a copy to: Sabey Corporation
                         101 Elliott Avenue W., Suite 330
                         Seattle, WA 98119

                                       2
<PAGE>

                         Attn.: Facilities Manager

         If to Tenant:   Pac West Telecomm, Inc.
                         4210 Coronado Avenue
                         Stockton, CA 95204
                         Attn.: Chief Financial Officer

         1.17 Permitted Uses.  "Permitted Uses" shall mean Tenant's use of the
Premises for a telecommunications switch site and other lawful accessory uses,
subject to the terms and conditions of this Lease. Landlord hereby represents to
Tenant that the current zoning affecting the Property allows such a
telecommunications switch site use.

         1.18 Landlord's Work.  "Landlord's Work" shall mean the improvements
to be made by Landlord in accordance with Exhibit C.

         1.19 Tenant's Work.  "Tenant's Work" shall mean the improvements, if
any, to be made by Tenant in accordance with Exhibit C.

         1.20 Guarantor.  Intentionally omitted.

         1.21 Exhibits.  The following exhibits or riders are attached to this
Lease and are incorporated into this Lease by this reference:

         (a)  Exhibit A - Legal Description
         (b)  Exhibit B - Floor Plan of Premises
         (c)  Exhibit C - Tenant Improvements
         (d)  Exhibit C-1 - Tenant's Removable Property
         (e)  Exhibit D - Rules And Regulations
         (f)  Exhibit E - Parking Area
         (g)  Exhibit F - Equipment and Operating Rights
         (h)  Exhibit G - Landlord's Lien Waiver
         (i)  Exhibit H - Memorandum of Lease
         (j)  Exhibit I - Subordination, Non-Disturbance, Estoppel and
              Attornment

     2.  PREMISES.  Landlord hereby leases to Tenant, and Tenant hereby leases
from Landlord, the Premises described in Section 1.3 together with the tenant
improvements described on Exhibit C ("Tenant Improvements") and together with
rights of ingress and egress over public and common areas in the Building and on
the land legally described on Exhibit A, including all easements pertinent to
the land ("Land"). Tenant's lease of the Premises shall be subject to all of the
terms and conditions of this Lease. The Premises, Building, Land, and the
improvements on the Land other than the Building, are sometimes collectively
referred to in this Lease as the "Property".

     Landlord shall complete Landlord's Work, if any, in accordance with Exhibit
C. Landlord represents that the Building Improvements, upon substantial
completion, shall materially comply with all applicable codes, regulations,
ordinances and laws including without limitation the American With Disabilities
Act. Notwithstanding anything to the contrary in this Lease, Tenant shall
provide Landlord and Landlord's contractor with such access to the Premises as
may be required by Landlord and Landlord's contractor to efficiently perform
Landlord's Work. Tenant acknowledges and agrees that Landlord shall have no
obligation to improve the Premises except as may be expressly set forth on
Exhibit C.

     On or before the Commencement Date, Landlord may recalculate the "net
rentable square feet" of the Premises (the net rentable square feet is
calculated by taking the usable square feet of the Premises and multiplying by
the load factor). The recalculated net rentable square feet shall

                                       3
<PAGE>

be certified by Tenant's architect prior to the Commencement Date. Net rentable
square feet shall be calculated in accordance with BOMA standards, utilizing a
load factor of ten and 9/10th percent (10.9%) for the Building which may be
changed upon the alteration of tenant spaces or building common areas before the
confirmation date letter to be sent according to section 3.5.

         2.1  Acceptance of Premises.  Landlord and Tenant hereby agree that
Landlord's Work as set forth in Exhibit C shall be constructed by Landlord's
contractor, Sabey Construction Inc. Tenant's acceptance of the Premises shall be
deferred until Landlord informs Tenant of the substantial completion of
Landlord's Work or Tenant occupies the Premises, whichever occurs first. Within
five (5) days ("Inspection Period") after the date Landlord informs Tenant of
such substantial completion, Tenant shall make such inspection of the Premises
as Tenant deems appropriate. Except as otherwise specified by Tenant in writing
to Landlord within the Inspection Period, Tenant shall be deemed to have
accepted the Premises in its condition and except for latent defects, as of such
date of substantial completion. If, as a result of such inspection, Tenant
discovers items of Landlord's Work of a nature commonly found on a "punch list"
(as such term is commonly used in the construction industry), which it
reasonably believes are not completed in accordance with Exhibit C, Tenant shall
notify Landlord of such items prior to the expiration of the Inspection Period.
Landlord shall promptly complete repair of all punch list items identified in
Tenant's notice which it reasonably believes require repair. The existence of
such punch list items shall not postpone the Commencement Date or the obligation
of Tenant to pay Base Rent or Additional Rent.

         2.2  Tenant Allowance.  Landlord will provide a Tenant allowance on a
monthly progress basis, equal to all costs to upgrade the floor loading, roof
improvements, and generator enclosure as outlined in Exhibit C upon Lease
commencement. Landlord will amortize the final amount over the first seven (7)
years of the Lease Term at a ten percent (10%) per annum interest rate and
Tenant shall pay such amounts as Additional Rent. Landlord's obligation to pay
the Tenant allowance is wholly conditioned upon Tenant not being in default
under the terms of this Lease (subject to applicable cure periods) prior to
payment of the Tenant allowance. In the event this Lease is terminated prior to
the payment of the Tenant allowance as a result of Tenant's default hereunder,
Tenant shall be solely liable for payment of any and all amounts of the Tenant
allowance to Tenant's contractor. Notwithstanding anything to the contrary in
this Section 2.2, payments of the Tenant allowance may be withheld by Landlord
on account of any of the following problems, claims filed or threatened by third
parties in connection with Tenant Improvements, damage to the Property due to
Tenant or its agents, employees, contractors or subcontractors, other
improvements of Tenant to the Premises or Tenant's breach of any of its
obligations under this Lease. Landlord shall pay the Tenant allowance once the
problems are remedied to its reasonable satisfaction. Tenant shall have the
right, through Tenant's Project Manager to approve or disapprove modifications
or changes to all construction budgets, changes to plans and specifications with
respect to the Tenant Improvements in accordance with the terms of Exhibit C.
Any modifications or changes to the approved plans and specifications and
budgets will be approved in writing by Tenant and Landlord.

     3.  LEASE TERM.

         3.1  Duration of Lease Term.  Tenant's lease of the Premises shall
commence on the Commencement Date and terminate on the Expiration Date or such
earlier or later date as may be provided for under this Lease. Notwithstanding
anything to the contrary in Section 1.6, if Landlord is unable to deliver
possession of the Premises to Tenant with Landlord's Work constructed by
Landlord's contractor substantially completed in accordance with Exhibit C on
the date specified in Section 1.6 and such delay (to the extent of such delay)
is due to no fault on the part of Tenant, then the Commencement Date shall be
the earlier of the date on which Tenant first occupies the Premises or the date
that is ten (10) days from the date of Landlord's written notice to Tenant of
substantial completion of Landlord's Work constructed by Landlord's contractor
provided for in Section 2, above.

                                       4
<PAGE>

         3.2  Extension Option.  Provided that Tenant is in compliance with all
the terms and conditions of this Lease or is not in default beyond any
applicable cure period both at the time of Tenant's exercise of this Option and
at the time the Option Term is scheduled to commence, Tenant shall have the
option ("Option") to extend the term of this Lease for two (2) additional
periods of five (5) years each (the "Option Term") on the same terms and
conditions of this Lease as are provided for in the initial Term, except as
provided below in this Section 3.2 or in Section 3.3. The Option Term shall
commence upon the date of expiration of the initial Term of this Lease. To
exercise its Option, Tenant must give written notice to Landlord that Tenant is
exercising its Option at least twelve (12) months before the date of expiration
of the initial Term. If, in Landlord's reasonable discretion, Landlord
determines that the creditworthiness of Tenant is materially less than the
creditworthiness of Tenant as of the Lease's execution date, Landlord may
nullify Tenant's exercise of its Option by written notice to Tenant. Tenant
acknowledges and agrees that notwithstanding anything to the contrary in this
Lease, the right to exercise the Option shall not extend to any assignee or
subtenant of Tenant, or to any space assigned or subleased by Tenant, and any
attempt to exercise the Option by any such assignee or subtenant, or by Tenant
in connection with such assigned or subleased space, shall be deemed null and
void, except that such option shall extend to any Permitted Transferee or
subtenant as defined in Section 15. Tenant further acknowledges and agrees that
the amount of the Security Deposit payable by Tenant for the Option Term may be
increased to an amount equal to the first monthly installment of Fixed Rent
payable by Tenant during the Option Term.

         3.3  Base Rent During Option Term.  In the event that Tenant elects to
exercise its Option to extend the Term of this Lease in accordance with the
terms of Section 3.2, the Base Rent for the Option Term shall be equal to the
then-market rate for similarly improved space in comparable buildings for
comparable use in the South Seattle-Tukwila region; provided, however, that in
no event shall the Base Rent during the Option Term be less than the Base Rent
for the last year of the initial Lease Term. The adjusted Base Rent shall
commence on and be payable on the first day of the Option Term and shall
continue thereafter throughout the Option Term.

     The market rate shall be determined on a triple net basis by analyzing
comparable lease transactions and lease renewals in the South Seattle/Tukwila
office market. In analyzing comparable transactions, all reasonable factors
affecting rent only shall be taken into consideration, including, but not
limited to, the office building age, size, style and condition and the date of
the comparable lease.

     If Landlord and Tenant cannot agree on a market rate for the Option Term
prior to one hundred twenty (120) days before Lease termination, then both
parties agree to use the appraisal process, outlined as follows: Each party will
hire an MAI appraiser. Each appraiser must have a minimum of five (5) years
appraisal experience in the South Seattle/Tukwila area. Each appraiser shall
complete his/her appraisal within thirty (30) days. If the appraisers' opinion
of the market rate differs by less than ten percent (10%) of the amount of the
higher appraisal; then the market rate shall be the average of the two
appraisals. If the appraiser's opinion of market rate differs by more than ten
percent (10%) of the higher appraisal then a third MAI appraiser satisfying the
same qualifications shall be mutually hired and paid for by both parties. The
third appraiser will evaluate the market using the same parameters outlined in
the preceding paragraph. The market rate estimate of the third appraiser shall
be averaged with the market rate estimate of the appraiser closest to it. The
Base Rent for the Option Term shall be the higher of the resultant average rent
utilizing this process or the Base Rent being paid at the time of the renewal.

         3.4  Confirmation of Commencement Date.  Landlord may confirm the
Commencement Date to Tenant in writing within a reasonable time after delivery
of the Premises in accordance with this Lease.

                                       5
<PAGE>

         3.5  Surrender of Premises.  Subject to Section 11, Tenant shall
promptly and peacefully surrender the Premises to Landlord upon the termination
of the Lease Term in as good a condition as when received by Tenant from
Landlord and/or as thereafter improved, if applicable, normal wear and tear
excepted. Unless Landlord expressly provides otherwise in writing to Tenant,
upon the expiration or termination of this Lease, all improvements and additions
to the Premises except those items set forth on Exhibit C-1 shall be deemed
property of Landlord and shall not be removed by Tenant from the Premises.
Tenant shall be solely responsible for, and shall repair, all damage to the
Property arising out of its surrender of the Premises. In addition to all other
requirements under this Lease, Tenant shall remove any Hazardous Substances, as
such term is defined in Section 6.3, on the Premises which were placed on the
Premises by Tenant, its employees, agents, contractors and/or invitees, prior to
its surrender and vacation of the Premises.

         3.6  Holding Over Without Consent.  If Tenant remains in possession of
the Premises after the termination or expiration of the Lease Term without
Landlord's prior written consent, Tenant shall become a tenant at sufferance
only, subject to all the provisions of this Lease so far as applicable, except
that Base Rent shall be increased to an amount equal to two hundred percent
(200%) multiplied by the sum of the monthly installments of Base Rent and
Additional Rent payable by Tenant during the last month of the Lease Term,
prorated on a daily basis. Acceptance by Landlord of Rent after the termination
of the Lease Term shall not result in a renewal or extension of this Lease. The
provisions of this Section 3.6 are in addition to, and shall not act as a waiver
of or otherwise affect, Landlord's right of re-entry or any other rights of
Landlord under this Lease or as provided by law or in equity. If Tenant fails to
surrender the Premises upon the termination of the Lease Term, despite
Landlord's demand to do so, Tenant shall indemnify, defend and hold Landlord
harmless from and against all loss and liability, including, without limitation,
any claim made by any succeeding tenant founded on, or resulting from, such
failure to surrender, including without limitation, any attorneys' fees or costs
associated therewith.

     40  RENT.

         4.1  Payment.  Tenant shall pay Landlord the monthly installments of
Base Rent provided in Section 1.9 and Additional Rent provided in Section 1.11
in lawful money of the United States, in advance, on the Commencement Date and
thereafter on or before the first day of each month throughout the Lease Term.
Base Rent and Additional Rent shall be paid by Tenant without notice or demand,
deduction, abatement, or offset, except as expressly provided herein. Base Rent
and Additional Rent for any partial month at the beginning or end of the Lease
Term shall be prorated in proportion to the number of days in such month. Base
Rent and Additional Rent are collectively referred to in this Lease as "Rent."

         4.2  Interest on Late Payments; Late Charge. If any Base Rent or
Additional Rent is not paid on the due date thereof: (i) such overdue amounts
shall bear interest at a rate equal to three (3) percentage points above the
prime rate of interest stated from time to time by Bank of America or its
successor, or, in the absence of an established prime rate, five (5) percentage
points over that bank's rate for one year certificates of deposit, but not in
excess of the highest lawful rate permitted under applicable laws, calculated
from the original due date thereof to the date of payment; and (ii) Tenant shall
pay Landlord a late charge equal to five percent (5%) of such overdue amount.
The parties hereby agree that such late charge represents a fair and reasonable
estimate of the costs Landlord will incur by reason of late payment by Tenant,
the exact amount of which would be difficult to ascertain. Acceptance by
Landlord of any partial amounts due under this Section 4 shall in no event
constitute a waiver of Tenant's default with respect to any overdue amount, nor
prevent Landlord from exercising any of its other rights and remedies granted
under this Lease or by law or in equity.

         4.3  Address for Payments.  Tenant shall pay all Rent to Landlord at
Landlord's Payment Address, or at such other place as may be designated by
Landlord from time

                                       6
<PAGE>

to time by written notice to Tenant at least thirty (30) days prior to the next
ensuing payment date.

     50  SECURITY DEPOSIT.  As security for the full and faithful performance
of every covenant and condition of this Lease to be performed by Tenant, Tenant
shall pay to Landlord the Security Deposit specified in Section 1.13. If Tenant
defaults with respect to any covenant or condition of this Lease, including but
not limited to, the payment of Base Rent or Additional Rent, Landlord may apply
all or any part of the Security Deposit to the payment of any sum in default or
payment of any other sum which Landlord may be required or may in its reasonable
discretion deem necessary to spend or incur by reason of Tenant's default. In
such event, Tenant shall deposit with Landlord the amount so applied within five
(5) days of written demand from Landlord. If Tenant shall have fully complied
with all of the covenants and conditions of this Lease the amount of the
Security Deposit then held by Landlord shall be repaid to Tenant (or, at
Landlord's option, to the last assignee of Tenant's interest under this Lease)
within thirty (30) days after the expiration or sooner termination of this
Lease. In the event of Tenant's default under this Lease, Landlord's right to
apply the Security Deposit in accordance with this Section shall be deemed to be
in addition to any and all other rights and remedies available to Landlord under
this Lease, at law or in equity. Landlord shall not be required to keep any
Security Deposit separate from its general funds and Tenant shall not be
entitled to any interest on the Security Deposit.

     60  USES; COMPLIANCE WITH LAWS.

         6.1  Permitted Uses.  The Premises are to be used only for the
Permitted Uses, and for no other business or purpose without the prior written
consent of Landlord, which consent may be withheld if Landlord, in its
reasonable discretion, determines that any proposed use is inconsistent with or
detrimental to the maintenance and operation of the Building as a similar office
building or is inconsistent with any restriction on use of the Property
contained in any lease, mortgage or other agreement or instrument by which the
Landlord may be bound or to which any of the Property may be subject.

         6.2  Duties and Prohibited Conduct.  Notwithstanding anything to the
contrary in this Lease, Tenant shall not commit any act that will increase the
then-existing rate of insurance on the Building without Landlord's prior written
consent. Tenant shall promptly pay upon demand the amount of any increase in
insurance rates caused by the Permitted Uses or by any act or acts of Tenant or
its employees, agents or representatives. Tenant shall not commit or allow to be
committed any waste upon the Premises, or any public or private nuisance or
other act which reasonably disturbs the quiet enjoyment of any other tenant of
the Property or which is unlawful. Tenant shall not, without the written consent
of Landlord, use any apparatus, machinery or device in or about the Premises, or
act in any way, which will cause any substantial noise, or any vibration, fumes,
or releases of Hazardous Substances into the surrounding environment. If any of
Tenant's office machines, equipment or activities should disturb the quiet
enjoyment of any other tenant in the Building, cause any substantial noise, or
cause any vibration, fumes or releases of Hazardous Substances, then Tenant, at
Tenant's sole expense, shall provide adequate insulation or take such other
action as may be necessary to eliminate such disturbance, noise, vibration,
fumes or releases. Tenant, at Tenant's expense, shall comply with all laws,
rules, regulations, orders, ordinances and permits relating to the Premises, or
its use or occupancy of the Premises, and shall observe such rules and
regulations as may be adopted by Landlord and made available to Tenant from time
to time. This Lease shall be subject to all applicable zoning ordinances and to
all municipal, county, state and federal laws and regulations governing or
regulating the use of the Premises.

         6.3  Environmental, Health And Safety Laws.  Without limiting Tenant's
obligations under this Section 6, Tenant in the exercise of its rights and the
performance of its obligations under this Lease shall comply, at Tenant's
expense, with all local, state, or federal laws, rules, regulations, ordinances,
orders and permits now existing, or as hereafter enacted,

                                       7
<PAGE>

amended, or issued concerning environmental, health, or safety matters
(collectively, the "Environmental Laws"). Tenant shall not use the Premises for,
or permit anything to be done in or about the Property which may subject
Landlord, any guarantor, or any mortgagee under any mortgage covering the
Property, to liability for remediation costs or other damages or penalties under
any Environmental Laws resulting from Tenant's use of, or conduct on, the
Property, including without limitation, the use, generation, transportation,
management, handling, treatment, storage, manufacture, emission, release,
disposal or deposit of any radioactive material, hazardous or toxic wastes,
hazardous or toxic substances, any material containing hazardous wastes or
hazardous substances (except as they occur in normal office products or
household cleaning products), or any other pollutant, contaminant, human
pathogen or infectious agent as such terms may now or in the future be defined
in any Environmental Laws (collectively, "Hazardous Substances"), on the
Property, adjacent surface waters, soils, underground waters, or air.

     Landlord shall have the right at all reasonable times upon notice to Tenant
to conduct environmental investigations, including the taking of samples, for
the purpose of detecting or measuring the presence of Hazardous Substances on
the Property. Tenant shall keep Landlord continuously informed by written notice
of all Hazardous Substances which Tenant, or Tenant's employees, agents,
representatives, or contractors, generates, stores or otherwise allows on the
Property. Tenant shall provide Landlord with copies of all documents received or
prepared by Tenant concerning any release of a Hazardous Substance at the
Property, all documents Tenant receives or prepares in connection with any
violation, or alleged violation, of an Environmental Law by Tenant, and all
reports or other documents Tenant is required to provide any governmental
authority under any Environmental Law concerning any Hazardous Substance. Upon
request by Landlord, Tenant shall provide Landlord with all other information
which Landlord reasonably deems necessary or useful for the purpose of
determining whether Tenant is in compliance with all Environmental Laws and
whether the Property, or any part of the Property, is contaminated by any
Hazardous Substances. If Tenant or the Premises is in violation of any
Environmental Law, or in the event of a release of Hazardous Substances into or
on the Property or adjacent surface waters, soils, underground waters, or air,
Tenant shall (i) immediately notify Landlord in writing of such occurrence and
the action necessary to correct or mitigate such occurrence, and (ii) take such
action as is necessary to mitigate and correct such violation or release.
Provided, however, Landlord reserves the right, but not the obligation, to enter
the Premises, to act in place of the Tenant (and Tenant hereby appoints Landlord
as its agent for such purposes) and to take such action as Landlord deems
necessary to ensure compliance or to mitigate the violation, at Tenant's
expense. If Landlord has a reasonable belief that Tenant is in violation of any
Environmental Law, or that Tenant's actions or inaction presents a threat of
violation or a threat of damage to the Property, Landlord reserves the right to
enter the Premises and take such corrective or mitigating action as Landlord
deems necessary. All costs and expenses incurred by Landlord in connection with
any such actions shall become immediately due and payable by Tenant upon
presentation of an invoice therefor.

     Tenant shall not conduct or permit others to conduct environmental testing
on the Premises without first obtaining Landlord's written consent. Tenant shall
promptly inform Landlord of the existence of any environmental study,
evaluation, investigation or results of any environmental testing conducted on
the Premises whenever the same becomes known to Tenant and Tenant shall provide
copies to Landlord, upon request by Landlord and at no cost to Landlord.
Notwithstanding the foregoing, in no event shall Tenant be responsible for or
liable to Landlord for any Hazardous Substances located in the Premises that
existed or were released upon the Premises prior to the Commencement Date of
this Lease. Landlord represents and warrants that to the best of its knowledge,
the Premises are free of any Hazardous Substances.

     70  SERVICES AND UTILITIES; REPAIRS AND MAINTENANCE.

         7.1  Services and Utilities; Landlord's Obligations.  Landlord shall
supply Landlord's standard Building and Property security and fire monitoring
services and elevator service, Landlord's standard trash removal services
(excluding disposal of Hazardous Substances

                                       8
<PAGE>

or medical or biological waste) from the Building compactor, and Landlord's
standard exterior window washing services for Premises' windows. Landlord shall
also provide any janitorial services to the Premises if so requested by Tenant.

     Any service or utility which is separately metered to the Premises by the
utility provider shall be billed directly to Tenant and paid directly by Tenant
to the utility provider. The Base rental rate excludes the cost of janitorial
services to the Premises, and utilities to the Premises including the estimated
utilities to supply the Premises with HVAC. All other services or utilities
which are required to be provided by Landlord under Section 7.1 which are not
separately metered by the service or utility provider shall be included within
"Operating Costs" and shall be paid by Tenant each month as provided in Section
8. The cost for any services or utilities which are not separately metered or
sub-metered shall be based on Landlord's reasonable estimate of Tenant's
consumption of such utilities. If in the Landlord's reasonable opinion the
Tenant's consumption of any utility is extraordinary, Landlord shall be entitled
to install, maintain and operate, at Tenant's cost, a monitoring/ metering
system(s) in the Premises to measure Tenant's consumption of water, electricity
(including electricity to Tenant's signage, if any) HVAC or other utilities or
services, or to measure the added demands on the Premises electrical or HVAC
systems resulting from Tenant's equipment or lights, including without
limitation, Tenant's improvements pursuant to Exhibit C.

     Landlord's obligation to provide the services and utilities described in
this Section 7.1 is subject to Section 11 (Damage And Destruction) and Section
22 (Condemnation).

              7.1.1 Additional Services Or Utilities.  During other than normal
business hours, Landlord may restrict access to the Building in accordance with
the Building's security system, provided that Tenant shall have at all times
during the term of this Lease (24 hours of all days) reasonable access to the
Premises.

     If, after written request by Tenant, Landlord furnishes HVAC or other
services or utilities in addition to the utilities or services required to be
provided by Landlord under this Lease, including without limitation, furnishing
utilities or services at times other than Normal Business Hours or in amounts
exceeding standard office use, then the cost of such non-standard or additional
services or utilities, as reasonably established by Landlord, shall be paid by
Tenant as Additional Rent.

          7.2 Services and Utilities; Tenant's Obligations. Tenant shall be
solely responsible for providing, and shall pay directly, all charges for
janitorial services to the Premises and for any security services desired by
Tenant in addition to Landlord's standard Building and site security services.
Tenant shall be solely responsible for providing, at Tenant's cost, any backup
electricity generator desired by Tenant. It is understood that, except as
provided in Sections 7.1 or 7.4, Landlord shall not be required to provide any
services or utilities to Tenant, and Tenant shall make all necessary
arrangements to have such services and utilities billed directly to Tenant and
paid directly by Tenant. Tenant shall pay its share, as reasonably determined by
Landlord, of any unique services or equipment used by Tenant which are shared by
other tenants of the Building, such as generators, dilution tanks and air
compressors.

              7.2.1 Services and Utilities; Tenant's Options.  Landlord grants
Tenant the option to install an HVAC unit(s) and/or a communications antenna on
the Building's rooftop, in a location(s) to be mutually agreed upon between
Landlord and Tenant. Tenant, at its option and at its sole cost and expense, may
install conduit from the street (Tukwila International Boulevard) to its
Premises with US West, Teligent and Nextlink, or such other fiber optic service
providers ("Service Providers"). Tenant shall be provided, at no charge, conduit
access from the Premises to such Service Providers from the location known in
Tenant's industry as the "meet me room", which is identified on Exhibit B-1.

          7.3 Interruption.  Landlord shall not be liable for any loss, injury
or damage to persons or property caused by or resulting from any variation,
interruption, or failure of services or utilities to be provided by Landlord
under this Lease due to any cause whatsoever,

                                       9
<PAGE>

including without limitation, Landlord's failure to make any repairs or perform
any maintenance required to be performed by Landlord under this Lease. No
temporary variation, interruption or failure of services or utilities to be
provided by Landlord under this Lease incident to the making of repairs,
alterations or improvements, or due to accident, strike or conditions or events
beyond Landlord's reasonable control, shall be deemed an eviction of Tenant or
relieve Tenant from any of Tenant's obligations under this Lease.

          7.4 Landlord's Repair and Maintenance Obligations.  Except as
provided in Sections 9 (Improvements and Alterations by Tenant), 11 (Damage or
Destruction) or 22 (Condemnation), Landlord shall cause to be maintained in
reasonably good order and condition the Premises and the public and common areas
of the Property, such as lobbies, elevators, stairs, corridors and restrooms;
provided, however, Tenant shall be responsible for the cost of repair of damage
occasioned by any act or omission of Tenant or Tenant's officers, contractors,
agents, invitees, licensees or employees, subject to Section 12, Waiver of
Subrogation. Landlord shall maintain and repair the Premises, water, if
applicable, and elevator service at all times during the term of the Lease.

          7.5 Tenant's Repair and Maintenance Obligations.  Except for
maintenance, replacements and repairs required to be made or provided by
Landlord under Sections 7.1 or 7.4, Tenant, at its sole cost and expense, shall
provide for the maintenance, repair and replacement within the Premises and all
built-in appliances and equipment which are in the Premises for Tenant's
exclusive use and any security systems or services desired by Tenant in addition
to any such systems or services as may be provided by Landlord under this Lease.

     In performing its obligations under this Section 7, Tenant, at Tenant's
expense, shall comply with all Environmental Laws and all other applicable laws,
ordinances, codes, orders, rules or regulations of any governmental authority.
Tenant shall retain, and shall provide Landlord upon request, copies of Tenant's
maintenance and service contract(s). Except as provided in Section 9 in
connection with Alterations, before making or performing any work, repairs, or
replacement of any kind in the Premises, if such work shall affect the building
systems or costs of operation to Landlord then Tenant shall obtain Landlord's
prior written approval, which approval may be conditioned, on Tenant providing
Landlord with plans and specifications therefor, if applicable, which are
acceptable to Landlord. All work, maintenance, repairs and replacements by
Tenant under this Lease shall be performed by licensed contractors acceptable to
Landlord. Before installing any heavy equipment or fixtures in the Premises,
Tenant shall submit the plans and specifications therefor to Landlord for
Landlord's written approval.

     80  ADDITIONAL RENT: OPERATING COSTS AND REAL ESTATE TAXES

         8.1  Definitions.  In addition to the Base Rent, Tenant shall pay to
Landlord each month as Additional Rent Tenant's Share of Taxes and of Operating
Costs as provided in this Section 8, using the following definitions:

              8.1.1  Taxes. "Taxes" shall mean taxes on real property and
personal property, charges and assessments (or any installments thereof due
during the Lease Year) levied with respect to the Property, any improvements,
fixtures and equipment on the Property, and all other property of Landlord, real
or personal, used directly in the operation of the Property, and any taxes
levied or assessed (or any installment thereof due during the Lease Year) in
addition to or lieu of, in whole or in part, such real property or personal
property taxes, or any other tax upon leasing of the Property and/or Building or
rents collected, but not including any federal or state income, estate, business
and occupation, inheritance or franchise tax.

              8.1.2  Operating Costs. "Operating Costs" shall mean all expenses
other than Taxes paid or incurred by Landlord for obtaining services and
products for maintaining, operating, equipment replacement, and repairing the
Property, including without limitation, the Property public and common areas,
and the personal property used in conjunction therewith, and which shall
include, without limitation, the costs of Landlord performing its

                                       10
<PAGE>

maintenance and repair obligations under this Lease, depreciation and
amortization of capital improvements made subsequent to the initial development
of the Property or Building which are designed with a reasonable probability of
enhancing the health and/or safety of the Property or improving the operating
efficiency of the Property or Building, security services for the Property, fire
alarm system monitoring and testing, refuse collection, maintaining water,
sewer, storm drainage and other utility systems and services, common area
electricity, gas and other similar energy sources (excluding electricity for the
Premises which will be charged to the Tenant subject to paragraph 8.6 below),
supplies, Premises janitorial if provided, common area janitorial and cleaning
services, exterior window washing, landscape planting, maintenance and
irrigation, services of independent contractors (including any market-rate
management fees which may be or become payable to third parties), compensation
(including employment taxes and fringe benefits) of all persons who perform
duties in connection with the operation, maintenance and repair of the Property
and its equipment, the maintenance, resurfacing, repair and striping of parking
areas and curbs (including driveways, loading zones and access easements),
downspouts and gutters, lighting and outdoor facilities, premiums for Landlord's
insurance, licenses, permits and inspection fees, a management fee, reasonable
legal, administrative and accounting expenses, and any other expense or charge
whether or not hereinabove described, which in accordance with generally
accepted accounting principles and management practices would be considered an
expense of maintaining, operating, or repairing the Property, excluding or
deducting, as appropriate costs of any special services rendered to individual
tenants (including Tenant) for which a special charge is collected including,
without limitation, any specially metered charges. Notwithstanding the
foregoing, Operating Costs shall not include the following:

     (1) attorney's fees, accounting fees and other expenditures incurred in
connection with negotiations, disputes and claims of other tenants or occupants
of the Building, except as specifically otherwise provided in the Lease;

     (2) costs directly attributable to or for the sole benefit of a tenant,
including Tenant;

     (3) rental on ground leases or other underlying leases;

     (4) cost of any work or services to the extent performed for any facility
other than the Building (provided Landlord shall have the right to reasonably
allocate the cost of services provided to more than one facility);

     (5) costs due to Landlord's willful violation of any governmental rule or
authority;

     (6) charitable or political contributions;

     (7) any fees paid to related parties of Landlord which exceed the market
rate for similar services.

              8.1.3 Tenant's Share. "Tenant's Share" in connection with
Operating Costs and Taxes shall mean Tenant's Share of the Property multiplied
by actual or estimated, as the case may be, Operating Costs or Taxes allocated
to the Property, respectively. Notwithstanding anything to the contrary in this
Section 8.1.3, for purposes of the determination of Operating Costs, to the
extent Operating Costs vary depending upon occupancy type or level of the areas
served, such varying Operating Costs shall be adjusted to ninety-five percent
(95%) of occupancy, so that such Operating Costs shall not reflect material
changes to the extent attributable to changes in occupancy type and/or levels.

         8.2  Payment of Additional Rent for Estimated Increases in Operating
Costs and Taxes.  Within ninety (90) days of the Commencement Date or the close
of each Lease Year, as applicable, or as soon thereafter as is practicable,
Landlord shall provide Tenant with a written statement of Tenant's Share of
estimated Operating Costs and increases in Operating Costs and Taxes for such
Lease Year. Tenant shall pay 1/12 of the amount of such estimated Operating
Costs, and increases in Operating Costs and Taxes as Additional Rent as

                                       11
<PAGE>

provided in Section 4 each month during such Lease Year and until such time as
Landlord provides Tenant with a statement of estimated increases for the
subsequent Lease Year. If at any time or times during such Lease Year, it
appears to Landlord that Tenant's Share of actual Operating Costs and/or actual
Taxes will vary from the estimated Operating Costs and/or Taxes by more than
five percent (5%) on an annual basis, Landlord may, by written notice to Tenant,
revise its estimate for such Lease Year and Additional Rent payable by Tenant
under this Section 8.2 for such Lease Year shall be increased based on
Landlord's revised estimate.

          8.3  Actual Operating Costs and Taxes.  Landlord will make reasonable
efforts within ninety (90) days after the close of each Lease Year during the
Term hereof for which an estimated statement was delivered to Tenant pursuant to
Section 8.2, to deliver to Tenant a written statement ("Reconciliation
Statement") setting forth Tenant's Share of the actual Operating Costs and Taxes
paid or incurred by Landlord during the preceding Lease Year (or such prorated
portion of such Lease Year if this Lease commences or terminates on a day other
than the first or last day of a Lease Year, based on a 365-day Lease Year). If
the actual Operating Costs and/or Taxes shown on the Reconciliation Statement
for any Lease Year exceed estimated Operating Costs and/or Taxes paid by Tenant
to Landlord pursuant to Section 8.2, Tenant shall pay the excess to Landlord as
Additional Rent within thirty (30) days after the date of the Reconciliation
Statement. If the Reconciliation Statement shows that actual Operating Costs
and/or Taxes are less than the estimated Operating Costs and/or Taxes paid by
Tenant to Landlord pursuant to Section 8.2, then the amount of such overpayment
shall be credited by Landlord to the next Additional Rent payable by Tenant (or
refunded to Tenant in the event of the termination or expiration of this Lease).
Notwithstanding anything to the contrary in this Section 8.3, Tenant's Share of
Operating Costs and Taxes for any partial Lease Year at the end of the Term
shall be as shown on Landlord's statement of estimated Operating Costs and Taxes
furnished to Tenant pursuant to Section 8.2.

          8.4  Determinations.  The determination of actual and estimated
Operating Costs and Taxes shall be made by Landlord. Landlord or its agent shall
keep records in reasonable detail showing all expenditures made for the items
enumerated in this Section 8.

     Tenant shall have the right at its own cost and expense to review and/or
inspect Landlord's records once in any calendar year with respect to any
Operating Costs shown on Landlord's annual reconciliation statement provided to
Tenant. Tenant shall give Landlord written notice of its intention to conduct
any such audit within ninety (90) days of the date of Landlord's annual
reconciliation statement or Tenant shall be deemed to have waived its audit and
inspection right with respect to the period of time covered in such statement.
Tenant's audit shall be conducted at Landlord's main business office, or at such
other location as Landlord may keep its relevant business records, and on a date
mutually agreed upon by Landlord and Tenant, but in no event earlier than sixty
(60) days from the date of Tenant's notice. Tenant, and its employees, agents,
attorneys and representatives agree that any and all information concerning
Operating Costs or any other information disclosed by Landlord pursuant to any
such audit shall not be disclosed to any other person or entity without the
prior written consent of Landlord, which consent shall be at Landlord's sole
discretion. Prior to providing such confidential information to any of Tenant's
employees, agents, attorneys or representatives, Tenant shall deliver to
Landlord a written acknowledgment of such parties' agreement to be bound by the
terms of this paragraph, in a form satisfactory to Landlord. Nothing in this
paragraph shall relieve Tenant of its obligation under Section 8 to pay
Additional Rent without notice, demand, offset or deduction.

          8.5  Tenant's Personal Property Taxes.  Tenant shall pay prior to
delinquency all Personal Property Taxes payable with respect to all Property of
Tenant located on the Premises or the Property and, upon Landlord's request,
shall promptly provide Landlord with written proof of such payment. Solely for
purposes of this Section 8.5, "Property of Tenant" shall include Landlord's
Work, Tenant's Work and all other improvements which are paid for by Tenant, and
"Personal Property Taxes" shall include all property taxes assessed against the
Property of Tenant, whether assessed as real or personal property.

                                       12
<PAGE>

          8.6  Tenant's Utility Charges.   Landlord and Tenant agree that
utilities to the Premises including the cost of utilities to provide Building
standard HVAC are not included in the Base Rent. Landlord will estimate, by
meter if possible, the cost of the Tenant's usage of electricity and natural gas
for its Premises, including the cost of utilities to heat and cool the Premises.
Tenant shall pay to the Landlord as Additional Rent each month the Landlord's
estimate of such charges. At the end of each calendar year the Landlord shall
compare the previous 12 months actual charges to its estimates. Any amounts
owing shall be paid by Tenant, and credit amounts shall be refunded to Tenant in
accordance with Section 8.3. Landlord shall adjust its estimates as provided for
in Section 8.2.

     90   IMPROVEMENTS AND ALTERATIONS BY TENANT.  Except for the Tenant
Improvements, Tenant shall not make any changes, alterations, additions or
improvements in or to the Premises ("Alterations"), including, without
limitation, changes to locks on doors or to plumbing or wiring, without first
obtaining the written consent of Landlord and, where required by Landlord, such
Alterations shall be made under the supervision of a competent architect and/or
a licensed structural engineer, and in accordance with plans and specifications,
approved by Landlord, which approval shall not be unreasonably withheld. Prior
to commencing any Alterations, Tenant shall notify Landlord of such work and
Landlord shall perform a good faith asbestos inspection in accordance with
applicable laws and regulations. All work with respect to any Alterations shall
be done in a good and workmanlike manner and shall be diligently prosecuted to
completion. In no event shall Tenant's Alterations change or affect the
strength, exterior appearance, or the mechanical, electrical, or plumbing
services or systems, of the Building without Landlord's consent. Tenant shall
reimburse Landlord upon demand for any sums expended by Landlord for examination
and approval of plans and specifications for any and all Alterations. Tenant
shall also pay Landlord a sum equal to the costs incurred by Landlord during any
inspection or supervision of any and all Alterations. All damages or injury to
the Property caused by any act or omission of Tenant, or Tenant's officers,
contractors, agents, invitees, licensees or employees, or by any persons who may
be in or upon the Property with the express or implied consent of Tenant,
including but not limited to, damage from cracked or broken glass in windows or
doors, shall be paid by Tenant upon demand by Landlord.

     100  ACCESS.  During other than Normal Business Hours, Landlord may
restrict access to the Building in accordance with a Landlord provided Building
security system. Tenant shall have at all times during the Lease Term (24 hours
of all days) reasonable access to the Premises and roof. Landlord, at Tenant's
cost, shall provide Tenant with security access cards to the Building if such
cards are a part of the Building's security system. Tenant will be allowed to
install its own card readers, provided that they are compatible with the
Building's system, and Landlord maintains emergency access. Tenant shall permit
Landlord and its agents to enter the Premises at all reasonable times (except in
cases of emergency) for the purpose of inspecting or improving the Premises or
the Building or for performing any of its obligations under this Lease, upon
advance notice to Tenant. Nothing contained in this Section 10 shall be deemed
to impose any obligation upon Landlord not expressly stated elsewhere in this
Lease. When reasonably necessary Landlord may temporarily close entrances,
doors, corridors, elevators or other facilities without liability to Tenant by
reason of such closure and without such action by Landlord being construed as an
eviction of Tenant or release of Tenant from the duty of observing and
performing any of the provisions of this Lease, so long as such action does not
materially and unreasonably interfere with Tenant's access to the leased
Premises. Landlord shall have the right to enter the Premises for the purpose of
showing the Premises to prospective tenants within the period of one hundred
eighty (180) days prior to the expiration or sooner termination of the Lease
Term.

     110  DAMAGE OR DESTRUCTION.

          11.1 Damage and Repair.  If the Building is damaged by fire or any
other cause to such extent that the cost of restoration, as estimated by
Landlord, will equal or exceed thirty percent (30%) of the replacement value of
the Building (exclusive of foundations) just

                                       13
<PAGE>

prior to the occurrence of the damage, or if insurance proceeds sufficient for
restoration are for any reason unavailable, then Landlord may no later than the
one hundred twentieth (120th) day following the damage, give Tenant a notice of
its election to terminate this Lease. In the event of such election; (a) this
Lease shall be deemed to terminate on the date that is thirty (30) days from the
date of Tenant's receipt of such notice ("Termination Date"); (b) Tenant shall
surrender possession of the Premises on the Termination Date; and (c) Rent and
Additional Rent shall be apportioned as of the date of Tenant's surrender and
any Rent paid for any period beyond such date shall be repaid to Tenant. If the
cost of restoration as estimated by Landlord shall amount to less than thirty
percent (30%) of said replacement value of the Building or Property and
insurance proceeds sufficient for restoration are available, or if Landlord does
not elect to terminate this Lease, Landlord shall restore the Building and the
Premises (to the extent of the improvements to the Premises originally provided
by Landlord hereunder but excluding any improvements paid for by Landlord with
any tenant allowance or credits) with reasonable promptness, subject to delays
beyond Landlord's control and delays in the making of insurance adjustments by
Landlord, and Tenant shall have no right to terminate this Lease except as
provided in this Section 11. To the extent that the Premises are rendered
untenantable by such damage or by Landlord's restoration work under this
Section, the Rent shall proportionately abate, provided, however, in the event
such damage resulted from or was contributed to, directly or indirectly, by the
act, fault or neglect of Tenant, Tenant's officers, contractors, agents,
employees, invitees or licensees, Base Rent shall abate only to the extent
Landlord receives proceeds from any rental income insurance policy received by
Landlord for loss of Rent under this Lease.

          11.2 Destruction During Last Year of Term.  Notwithstanding anything
to the contrary in this Lease, in case the Building shall be substantially
destroyed by fire or other cause at any time during the last Lease Year of this
Lease, either Landlord or Tenant may terminate this Lease upon written notice to
the other given within thirty (30) days of the date of such destruction.

          11.3 Business Interruption.  No damages, compensation or claim shall
be payable by Landlord for inconvenience, loss of business or annoyance arising
from any damage or destruction, repair or restoration of any portion of the
Premises or the Building. Landlord shall use reasonable efforts to effect such
repairs promptly.

          11.4 Tenant Improvements.  Landlord will not carry insurance of any
kind on any improvements or alterations paid for by Tenant under this Lease or
paid for pursuant to any tenant allowance or credits from Landlord, or on
Tenant's furniture, furnishings, fixtures, equipment or appurtenances of Tenant
under this Lease and Landlord shall not be obligated to repair any damage
thereto or replace the same. Tenant shall insure its improvements in accordance
with Section 14.2 and proceeds of such insurance shall be used in any repair or
restoration of the Premises.

          11.5 Express Agreement.  The provisions of this Section 11 shall be
considered an express agreement governing any case of damage or destruction of
the Building or Premises by fire or other casualty.

     120  WAIVER OF SUBROGATION.  Whether loss or damage is due to the
negligence of either Landlord or Tenant, their agents or employees, or any other
cause, Landlord and Tenant do each hereby release and relieve the other, their
agents or employees, from responsibility for, and waive their entire claim of
recovery for, (i) any loss or damage to the real or personal property of either
party located anywhere on the Property, including the Building itself, arising
out of or incident to the occurrence of any of the perils which are covered, or
are required to be covered under this Lease, by their respective property and
related insurance policies, and (ii) any loss resulting from business
interruption at the Premises or loss of rental income from the Building, arising
out of or incident to the occurrence of any of the perils covered by any
business interruption insurance policy, or by any loss of rental income
insurance policy, which may be held by Landlord or Tenant. Each party shall use
best efforts to cause its

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<PAGE>

insurance carriers to consent to the foregoing waiver of rights of subrogation
against the other party. Notwithstanding the foregoing, no such release shall be
effective unless and to the extent the aforesaid insurance policy or policies
shall expressly permit such a release or contain a waiver of the carrier's right
to be subrogated.

     130  INDEMNIFICATION.  Landlord shall not be liable for, and Tenant shall
defend (unless Landlord waives its right to such defense, and in any event with
counsel reasonably satisfactory to Landlord), indemnify, hold harmless and
protect Landlord and its employees and agents from any claim, demand, liability,
judgment, award, fine, mechanics' lien or other lien, loss, damage, expense,
penalty, charge or cost of any kind or character (including actual attorney fees
and court costs) which may be made, incurred or asserted by Tenant, Tenant's
agents or employees, contractors, or any third parties (including but not
limited to Landlord's agents, servants or employees), arising directly or
indirectly from: (a) any labor dispute involving Tenant or its agents or
contractors (but excluding labor disputes involving Landlord or its contractors,
subcontractors, or agents); (b) the construction, repair, alteration,
improvement, use, occupancy or enjoyment of the Premises by Tenant its
contractors, agents, employees and/or customers or invitees, (c) injury to, or
death of, any person or persons or damage to, or destruction of, any property
(including without limitation the costs of investigation, removal or remedial
action and disposal of any hazardous or toxic substances, as such terms may be
defined under any applicable federal, state, or municipal law, statute, rule or
regulation) occurring in, on or about the Premises, unless it is the result of
Landlord's negligence or (d) Tenant's breach of this Lease or the acts or
omissions of Tenant or its officers, directors, shareholders, employees,
contractors, subcontractors, or agents (the "Claims"). Notwithstanding anything
to the contrary in this Section 13, nothing in this Section 13 shall relieve
Landlord from responsibility for its proportionate share of its fault
attributable to its negligence or wilful misconduct in causing any such Claims.
TENANT HEREBY WAIVES ITS IMMUNITY WITH RESPECT TO LANDLORD UNDER THE INDUSTRIAL
INSURANCE ACT (RCW TITLE 51) AND/OR THE LONGSHOREMEN'S AND HARBOR WORKER ACT,
AND/OR ANY EQUIVALENT ACTS AND TENANT EXPRESSLY AGREES TO ASSUME POTENTIAL
LIABILITY FOR ACTIONS BROUGHT AGAINST LANDLORD BY TENANT'S EMPLOYEES. THIS
WAIVER HAS BEEN SPECIFICALLY NEGOTIATED BY THE PARTIES TO THIS LEASE AND TENANT
HAS HAD THE OPPORTUNITY TO, AND HAS BEEN ENCOURAGED TO, CONSULT WITH INDEPENDENT
COUNSEL REGARDING THIS WAIVER.

     Without limiting Tenant's obligations under this Section 13, Tenant agrees
to defend, indemnify and hold Landlord harmless from and against any and all
claims, causes of action, regulatory demands, liabilities, fines, penalties,
losses, and expenses, including without limitation, clean-up or other remedial
costs (including attorneys' fees, costs and all other reasonable litigation
expenses when incurred and whether incurred in defense of actual litigation or
in reasonable anticipation of litigation), arising from the existence or
discovery of any Hazardous Substance on the Premises, or the migration of any
Hazardous Substance from the Premises to other properties or into the
surrounding environment, whether (i) made, commenced or incurred during the term
of this Lease, or (ii) made, commenced or incurred after the expiration or
termination of this Lease if arising out of events occurring during the term of
this Lease.

     Tenant shall not be liable for, and Landlord shall defend (unless Tenant
waives its rights to defense, and in any event with counsel reasonably
satisfactory to Tenant), indemnify, hold harmless and protect Tenant and its
employees and agents from any claim, demand, liability, judgment, award, fine,
mechanics lien or other lien, loss, damage, expense, penalty, charge or cost of
any kind of character (including reasonable attorneys' fees and court costs)
which may be made, incurred or asserted against Tenant by third parties arising
or resulting from damage to property or injury to person to the extent caused by
the negligence or willful misconduct of Landlord, its employees, agents,
servants or representatives.

     140  INSURANCE.

                                       15
<PAGE>

          14.1 Liability Insurance.  Commencing on the earlier of the
Commencement Date or the date Tenant first enters onto the Premises and
continuing throughout the term of this Lease and any renewal hereof, Tenant
shall, at its own expense, keep and maintain in full force and effect, a policy
of commercial general liability insurance including a contractual liability
endorsement covering Tenant's obligations under Section 13, insuring Tenant's
activities upon, in or about the Premises or the Building against claims of
bodily injury or death or property damage or loss with a limit of not less than
$2,000,000 combined single limit per occurrence and annual aggregate.

          14.2 Property Insurance.  Commencing on the earlier of the
Commencement Date or the date Tenant first enters onto the Premises and
continuing throughout the Term of this Lease and any renewal hereof, Tenant
shall, at its own expense, keep and maintain in full force and effect, what is
commonly referred to as "all risk" coverage insurance (but excluding earthquake
and flood) on Tenant's leasehold improvements, including without limitation, any
improvements made by Landlord on behalf of Tenant or pursuant to a tenant
allowance or credit, in an amount not less than the current 100% replacement
value thereof. Landlord shall not carry insurance on Tenant's leasehold
improvements.

          14.3 Insurance Policy Requirements.  All policies of insurance
required under this Section 14 shall be issued by companies qualified to do
business in the State of Washington and holding a general policy holder's rating
of not less than "A" and a financial rating of not less than "Class XI" as rated
in the most current available edition of "Best's Insurance Reports." All such
policies shall contain cross-liability endorsements and shall name Landlord,
Landlord's mortgagees or beneficiaries and such additional individuals or
entities as Landlord may from time to time designate as primary additional
insureds. No insurance policy required under this Section 14 shall be canceled
or reduced in coverage and each insurance policy shall provide that it is not
subject to cancellation or a reduction in coverage except after thirty (30) days
prior written notice to Landlord. Tenant shall deliver to Landlord upon
Commencement Date or the date Tenant first enters onto the Premises and from
time to time thereafter, a copy of the certificate of insurance evidencing the
existence, endorsements, and amounts of same as required by Landlord. In no
event shall the limits of any insurance policy required under Section 14 be
considered as limiting the liability of Tenant under this Lease. All public
liability, property damage and other policies shall be written as primary
policies, not contributing with or secondary to coverage which Landlord may
carry.

     150  ASSIGNMENT AND SUBLETTING.

          15.1 Assignment or Sublease.  Except as expressly permitted below,
Tenant shall not assign, mortgage, encumber or otherwise transfer this Lease or
sublet the whole or any part of the Premises without in each case first
obtaining Landlord's prior written consent, which consent may not be
unreasonably conditioned, delayed or withheld. Tenant also acknowledges that any
right of first refusal, option to extend the Term of this Lease, terminate this
Lease, or any other options which Landlord has granted herein are particular to
Tenant are not assignable or transferable to any assignee or sublessee under
this Lease, except to a Permitted Transferee.

     In no event shall an assignment, subletting or other transfer of the Lease,
other than a transfer to a Permitted Transferee, relieve Tenant of any of its
obligations under this Lease. Consent to any such assignment, subletting or
transfer shall not operate as a waiver of the necessity for consent to any
subsequent assignment, subletting or transfer.

     If such consent is requested, Landlord reserves the right to terminate this
Lease, or, if consent is requested for subletting less than the entire Premises,
to terminate this Lease with respect to the portion for which such consent is
requested, at the proposed effective date of such subletting, in which event
Landlord shall enter into the relationship of Landlord and Tenant with any such
subtenant or assignee, based on the rent (and/or other compensation) and the
term

                                       16
<PAGE>

agreed to by such subtenant or assignee and otherwise upon the terms and
conditions of this Lease.

     If Tenant is a corporation, any transfer of this Lease by merger,
consolidation or liquidation, or any change in the ownership of a majority of
its outstanding voting stock, or power to vote a majority of its outstanding
voting stock, shall constitute an assignment for the purpose of this Section 15;
provided, however, for the purposes of this Section 15, a public offering of
stock registered with the SEC, shall not constitute a transfer. If Tenant is a
partnership, any transfer of this Lease by merger, consolidation, liquidation,
dissolution, or any change in the ownership of a majority of the partnership
interests shall constitute an assignment for the purpose of this Section 15.

     Tenant shall have the right, without Landlord's consent, to sublet or
assign the Premises or any part thereof to any subsidiary of Tenant or to any
entity which controls or is under the common control of Tenant ("Permitted
Transferee"). Furthermore, provided that the successor to Tenant resulting from
a merger, consolidation or other corporate restructuring has a net worth of at
least Twenty Million Dollars ($20,000,000) or ten percent (10%) equity to total
assets, Landlord's consent to any such subletting or assignment shall not be
required.

          15.2 Documentation and Expenses.  In connection with each request for
an assignment or subletting Tenant shall: (i) submit in writing to Landlord the
name and legal composition of the proposed subtenant or assignee, the nature of
the proposed subtenant's or assignee's business to be carried on in the
Premises, the terms and provisions of the proposed sublease or assignment and
such reasonable financial information as Landlord may request concerning the
proposed subtenant or assignee; and (ii) pay Landlord's reasonable costs of
processing such assignment or subletting, including attorneys' fees, upon demand
of Landlord. Tenant shall provide Landlord with copies of all assignments,
subleases and assumption instruments.

          15.3 Transferee Obligations.  As a condition to Landlord's approval of
an assignment, any potential assignee otherwise acceptable to Landlord shall
assume, in writing, all of Tenant's obligations under this Lease and Tenant and
such assignee shall agree, in writing, to be jointly and severally liable for
the performance of all of Tenant's obligations under this Lease. As a condition
to Landlord's approval any sublessee otherwise acceptable to Landlord such
sublessee shall assume, in writing, all of Tenant's obligations under this Lease
as to the subleased portion of the Premises and Tenant and such sublessee shall
agree, in writing, to be jointly and severally liable with Tenant for Rent and
performance of all of the terms, covenants, and conditions of such approved
sublease.

     160  SIGNS.  Tenant shall not inscribe any inscription, or post, place, or
in any manner display any sign, graphics, notice, picture, placard or poster, or
any advertising matter whatsoever, anywhere in or about the Property at places
visible (either directly or indirectly as an outline or shadow on a glass pane)
from anywhere outside the Premises without first obtaining Landlord's written
consent, such consent to be at Landlord's sole discretion. Any such consent by
Landlord shall be upon the understanding and condition that Tenant shall remove
the same at the expiration or sooner termination of this Lease and Tenant, at
its expense, shall repair any damage to the Property, or any portion thereof,
caused by such removal. Notwithstanding the foregoing, if Tenant is permitted to
place signage on the Building such signage must be pre-approved by Landlord's
architect and must comply with local laws. The cost of such signage,
maintenance, repair and operation shall be borne exclusively by Tenant.

     170  LIENS.  Tenant shall keep its interest in this Lease, any property of
Tenant located on the Property (other than the unattached personal property set
forth on Exhibit C-1), and the Property free from any liens arising out of any
work performed or materials ordered or obligations incurred by or on behalf of
Tenant and Tenant hereby agrees to indemnify, defend and hold Landlord harmless
from and against any liability from any such lien, including without

                                       17
<PAGE>

limitation, liens arising from Tenant's Work. In the event any lien is filed
against the Property, or any portion thereof, by any person claiming by, through
or under Tenant, Tenant shall, upon request of Landlord and at Tenant's expense,
immediately either cause such lien to be released of record or furnish to
Landlord a bond, in form and amount and issued by a surety, satisfactory to
Landlord, indemnifying Landlord and the Property against all liability, costs
and expenses, including attorneys' fees, which Landlord may incur as a result
thereof. Provided that such bond has been furnished to Landlord, Tenant, at its
sole cost and expense and after written notice to Landlord, may contest, by
appropriate proceedings conducted in good faith and with due diligence, any
lien, encumbrance or charge against the Property arising from work done or
materials provided to and for Tenant, if, and only if, such proceedings suspend
the collection thereof against Landlord, Tenant and the Property and neither the
Property nor any part thereof or interest therein is or will be in any danger of
being sold, forfeited or lost.

     180  BANKRUPTCY.

          18.1 Assumption of Lease.  In the event Tenant becomes a Debtor under
Chapter 7 of the Bankruptcy Code ("Code") or a petition for reorganization or
adjustment of debts is filed concerning Tenant under Chapters 11 or 13 of the
Code, or a proceeding is filed under Chapter 7 of the Code and is transferred to
Chapters 11 or 13 of the Code, the Trustee or Tenant, as Debtor and as
Debtor-In-Possession, may not elect to assume this Lease unless, at the time of
such assumption, the Trustee or Tenant has: (i) Cured all defaults under the
Lease and paid all sums due and owing under the Lease or provided Landlord with
"Adequate Assurance" (as defined below) that: (i) within ten (10) days from the
date of such assumption, the Trustee or Tenant will completely pay all sums due
and owing under this Lease and compensate Landlord for any actual pecuniary loss
resulting from any existing default or breach of this Lease, including without
limitation, Landlord's reasonable costs, expenses, accrued interest, and
attorneys' fees incurred as a result of the default or breach; (ii) within
twenty (20) days from the date of such assumption, the Trustee or Tenant will
cure all non-monetary defaults and breaches under this Lease, or, if the nature
of such non-monetary defaults is such that more than twenty (20) days are
reasonably required for such cure, that the Trustee or Tenant will commence to
cure such non-monetary defaults within twenty (20) days and thereafter
diligently prosecute such cure to completion; and (iii) the assumption will be
subject to all of the provisions of this Lease.

               18.1.1  Definition of Adequate Assurances.  For purposes of this
Section 18, Landlord and Tenant acknowledge that in the context of a bankruptcy
proceeding involving Tenant, at a minimum, "Adequate Assurance" shall mean: (i)
the Trustee or Tenant has and will continue to have sufficient unencumbered
assets after the payment of all secured obligations and administrative expenses
to assure Landlord that the Trustee or Tenant will have sufficient funds to
fulfill the obligations of Tenant under this Lease; and (ii) the Bankruptcy
Court shall have entered an Order segregating sufficient cash payable to
Landlord and/or the Trustee or Tenant shall have granted a valid and perfected
first lien and security interest and/or mortgage in or on property of Trustee or
Tenant acceptable as to value and kind to Landlord, to secure to Landlord the
obligation of the Trustee or Tenant to cure the monetary and/or non-monetary
defaults and breaches under this Lease within the time periods set forth above;
and (iii) the Trustee or Tenant, at the very minimum, shall deposit a sum equal
to 2 month's Base Rent to be held by Landlord (without any allowance for
interest thereon) to secure Tenant's future performance under the Lease.

          18.2 Assignment of Lease.  If the Trustee or Tenant has assumed the
Lease pursuant to the provisions of this Section 18 for the purpose of assigning
Tenant's interest hereunder to any other person or entity, such interest may be
assigned only after the Trustee, Tenant or the proposed assignee have complied
with all of the terms, covenants and conditions of this Lease, including,
without limitation, those with respect to Additional Rent. Landlord and Tenant
acknowledge that such terms, covenants and conditions are commercially
reasonable in the context of a bankruptcy proceeding of Tenant. Any person or
entity to which this Lease is assigned pursuant to the provisions of the Code
shall be deemed without further act or deed to have assumed all of the
obligations arising under this Lease on and after the date of such

                                       18
<PAGE>

assignment. Any such assignee shall upon request execute and deliver to Landlord
an instrument confirming such assignment.

          18.3 Adequate Protection.  Upon the filing of a petition by or against
Tenant under the Code, Tenant, as Debtor and as Debtor-In-Possession, and any
Trustee who may be appointed agree to adequately protect Landlord as follows:
(i) to perform each and every obligation of Tenant under this Lease until such
time as this Lease is either rejected or assumed by Order of the Bankruptcy
Court; (ii) to pay all monetary obligations required under this Lease, including
without limitation, payment of Rent and Additional Rent payable hereunder which
is considered reasonable compensation for the use and occupancy of the Premises;
(iii) provide Landlord a minimum of thirty (30) days prior written notice,
unless a shorter period is agreed to in writing by the parties, of any
proceeding relating to any assumption of this Lease or any intent to abandon the
Premises, which abandonment shall be deemed a rejection of this Lease; and (iv)
to perform to the benefit of Landlord as otherwise required under the Code. The
failure of Tenant to comply with the above shall result in an automatic
rejection of this Lease.

     19.  DEFAULT.

          19.1 Cumulative Remedies.  All rights of Landlord in this Lease shall
be cumulative, and none shall exclude any other right or remedy allowed by law
in force when the default occurs or in equity. In addition to the other remedies
provided in this Lease, Landlord shall be entitled to restrain by injunction
(without bond) the violation or attempted violation of any of the covenants,
agreements or conditions of Tenant under this Lease.

          19.2 Tenant's Default; Right to Cure.  The failure of Tenant to
perform any obligation of Tenant as provided in this Lease shall be a default
under this Lease. Tenant shall have a period of five (5) business days from the
date of Tenant's receipt of written notice from Landlord to Tenant within which
to cure any default in the payment of Rent or Additional Rent. Tenant shall have
a period of ten (10) business days from the date of written notice from Landlord
to Tenant to cure any other default under this Lease; provided, however, that
with respect to any such default which cannot be cured within such ten (10) day
period, the default shall not be deemed to be uncured if Tenant commences to
cure within ten (10) days and for so long as Tenant is diligently prosecuting
the cure thereof.

          19.3 Landlord's Rights And Remedies.  Upon the occurrence of an
uncured default by Tenant, Landlord, in addition to all other rights or remedies
it may have, at its option, may exercise any of the following rights without
further notice or demand of any kind to Tenant or any other person, except as
required by applicable State law:

               19.3.1  Termination of Lease.  The right of Landlord to terminate
this Lease and Tenant's right to possess the Premises and to reenter the
Premises, take possession thereof and remove all person from the Premises,
following which Tenant shall have no further claim thereon or hereunder;

               19.3.2  Re-entry of the Premises.  The right of Landlord, without
terminating this Lease and Tenant's right to possess the Premises, to reenter
the Premises and occupy the whole or any part of the Premises for and on account
of Tenant and to collect any unpaid Rents which have become payable, or which
may thereafter become payable; or

               19.3.3  Termination After Reentry.  The right of Landlord, even
though it may have reentered the Premises in accordance with Section 19.3.2, to
elect thereafter to terminate this Lease and Tenant's right to possess the
Premises.

     Should Landlord reenter the Premises under Section 19.3.2, Landlord shall
not be deemed to have terminated this Lease or to have accepted a surrender
thereof by any such reentry, unless Landlord shall have notified Tenant in
writing that it has so elected to terminate this Lease and Tenant's right of
possession. Tenant further covenants that Landlord's service of any notice

                                       19
<PAGE>

pursuant to the unlawful detainer statutes of the State of Washington and
Tenant's surrender of possession pursuant to such notice shall not (unless
Landlord elects to the contrary at the time of, or at any time subsequent to,
the serving of such notice and such election is evidenced by a notice to Tenant)
be deemed to be a termination of this Lease. In the event of any reentry or
taking of possession of the Premises as provided above in this Section 19,
Landlord shall have the right, but not the obligation, to remove from the
Premises all or any part of Tenant's property located in the Premises and to
place such property in storage at a public warehouse at the expense and risk of
Tenant.

          19.4 Landlord's Damages.  If Landlord terminates this Lease and
Tenant's right to possession of the Premises pursuant to the terms of this
Section 19, Landlord may recover from Tenant as damages, all of the following:

               19.4.1 Delinquent Rent.  The worth at the time of award of any
unpaid Rent earned at the time of such termination;

               19.4.2 Rent After Termination Until Judgment.  The worth at the
time of award of the amount by which the unpaid Rent that would have been earned
after termination until the time of award exceeds such rent loss Tenant proves
could have been reasonably avoided;

               19.4.3 Rent After Judgment.  The worth at the time of award of
the amount by which the unpaid Rent for the balance of the Lease Term after the
time of award exceeds the amount of such rent loss that Tenant proves could be
reasonably avoided;

               19.4.4 Leasing Concessions.  The unamortized portion any
financial concessions incurred by Landlord on Tenant's behalf to arrange for
Tenant's leasing of the Premises that Landlord conditionally waived at the
commencement of the Lease in consideration of Tenant's full performance of this
Lease, but which upon termination of the Lease pursuant to this Section 19 shall
accrue as rent, which costs include, but are not limited to, leasing
commissions, tenant allowances and improvements (including without limitation,
the cost of any improvements to the Premises by Landlord pursuant to Exhibit C),
"free rent" allowances and other such concessions in this Lease, amortized on a
straight-line basis over the number of months during the Lease Term in which
Tenant is obligated to pay Base Rent, and such amounts shall become immediately
due and payable as Rent earned at the time of such termination of the Lease;

               19.4.5 Other Compensation.  Any other amount necessary to
compensate Landlord for all the detriment proximately caused by Tenant's failure
to perform its obligations under this Lease or which in the ordinary course of
things would be likely to result therefrom, including, without limitation, any
cost or expense incurred by Landlord in (i) retaking possession of the Premises,
including reasonable attorney fees therefor, (ii) maintaining or preserving the
Premises after such default, (iii) preparing the Premises for reletting to a new
tenant, including repairs necessary to the Premises for such reletting, (iv)
leasing commissions, limited to those years remaining in the initial term, and
(v) any other costs necessary or appropriate to relet the Premises; and

               19.4.6 Additional or Alternative Damages.  At Landlord's
election, such other amounts in addition to or in lieu of the foregoing in this
Section 19.4 as may be permitted from time to time by the laws of the State of
Washington; and

               19.4.7 Calculation of Damages.  As used in Sections 19.4.1 and
19.4.2, the "worth at the time of award" is to be computed by allowing interest
at the rate specified in Section 4.2. As used in Section 19.4.3, the "worth at
the time of award" is computed by discounting such amount at a discount rate
equal to six percent (6%) per year or the maximum rate allowed by any usury or
similar law, if any, of the State of Washington applicable to Tenant, whichever
is less. All Rent, other than Base Rent, shall, for the purposes of calculating
any

                                       20
<PAGE>

amount due under the provisions of Section 19.4.3 be computed on the basis of
the average monthly amount thereof accruing during the immediately preceding
sixty (60) month period, except that if it becomes necessary to compute such
rent before such a sixty (60) month period has occurred, then such rent shall be
computed on the basis of the average monthly amount hereof accruing during such
shorter period.

          19.5 Fixtures.  Without limiting any of Landlord's rights under this
Lease, in the event of Tenant's default, Tenant's property specified on Exhibit
C-l and any other property which pursuant to the terms of this Lease may be
removed by Tenant at the termination of this Lease, but subject to the lien
rights of any lenders previously agreed, shall (i) be removed by Tenant upon
demand by Landlord, or (ii) if not so removed by Tenant, may be removed by
Landlord from the Premises and placed in storage at a public warehouse at the
expense and risk of Tenant.

          19.6 No Waiver.  The waiver by Landlord of any breach of any term,
covenant or condition contained in this Lease shall not be deemed to be a waiver
of such term, covenant or condition or any subsequent breach thereof, or of any
other term, covenant or condition contained in this Lease. Landlord's subsequent
acceptance of partial rent or performance by Tenant shall not be deemed to be an
accord and satisfaction or a waiver of any preceding breach by Tenant of any
term, covenant or condition of this Lease or of any right of Landlord to a
forfeiture of the Lease by reason of such breach, regardless of Landlord's
knowledge of such preceding breach at the time of Landlord's acceptance. No
term, covenant or condition of this Lease shall be deemed to have been waived by
Landlord unless such waiver is in writing and signed by Landlord.

          19.7 Waiver of Notice.  Notwithstanding anything to the contrary in
this Section 19, Tenant waives (to the fullest extent permitted under law) any
written notice, other than such notice as this Section 19 or any other provision
of this Lease specifically requires, which any statute or law now or hereafter
in force prescribes be given Tenant.

          19.8 Waiver of Redemption Rights.  Tenant, for itself, and on behalf
of any and all persons claiming through or under it, including creditors of all
kinds, does hereby waive and surrender all right and privilege which they or any
of them might have under or by reason of any present or future law, to redeem
the Premises or to have a continuance of this Lease for the term hereof, as it
may have been extended, after having been dispossessed or ejected therefrom by
process of law or under the terms of this Lease or after the termination of this
Lease as herein provided.

          19.9 Default by Landlord.  Landlord shall not be in default unless
Landlord fails to perform obligations required of Landlord within a reasonable
time, but in no event later than thirty (30) days after written notice by Tenant
to Landlord and any mortgagee whose name and address has been provided to Tenant
in writing ("Mortgagee"); provided, however, that if the nature of Landlord's
obligation is such that more than thirty (30) days are required for performance,
then Landlord shall not be in default if Landlord commences performance within
such 30-day period and thereafter diligently prosecutes the same to completion.
Any mortgagee may also cure such default within the above time period. If
Landlord fails to cure any such default within the allotted time, Tenant may,
with reasonable written notice, undertake cure of such default itself and
Landlord shall pay the reasonable cost thereof on demand. Provided, however, if
Landlord fails to provide power at the minimum amperage required by this Lease
by the date set forth in Exhibit C, Section I, Landlord will be in default
immediately without notice from Tenant and without the passage of any time
period. Upon the failure to provide the minimum amperage required by this Lease,
Tenant may terminate this Lease by written notice to Landlord within a five (5)
day period following the date power was to be supplied. Failure of Tenant to
terminate this Lease shall be a waiver of such right, and the right to terminate
this Lease, subject to the power requirement shall not be valid.

                                       21
<PAGE>

     20.  SUBORDINATION AND ATTORNMENT.  This Lease shall be subordinate to any
mortgage or deed of trust now existing or hereafter placed upon the Land, the
Building or the Premises, created by or at the instance of Landlord, and to any
and all advances to be made thereunder and to interest thereon and all
modifications, renewals and replacements or extensions thereof ("Landlord's
Mortgage"); provided, however, that the holder of any Landlord's Mortgage or any
person or persons purchasing or otherwise acquiring the Land, Building or
Premises at any sale or other proceeding under any Landlord's Mortgage may elect
to continue this Lease in full force and effect and, in such event, Tenant shall
attorn to such person or persons. Notwithstanding the foregoing, if a lender
requires that the Lease be subordinate to any mortgage recorded after the date
of the Lease affecting the Property, the Lease shall be subordinate to such
mortgage if Landlord first obtains from such lender a written statement
providing that so long as Tenant performs its obligations under the Lease, no
foreclosure of, deed given in lieu of foreclosure of, or sale under the
mortgage, and no steps or procedures, taken under the mortgage, shall affect
Tenant's rights under this Lease. Tenant shall execute, acknowledge and deliver
documents which the Holder of any Landlord's Mortgage may require to effectuate
the provisions of this Section 20 within ten (10) days of the date of Landlord's
request therefor. In the event of any transfer of Landlord's interest in the
Premises or in the Property, other than a transfer for security purposes only,
the transferor shall be automatically relieved of any and all obligations and
liabilities on the part of Landlord accruing from and after the date of such
transfer and such transferee shall have no obligation or liability with respect
to any matter occurring or arising prior to the date of such transfer, except
for any Security Deposit held. Tenant agrees to attorn to such transferee,
provided transferee assumes all of Landlord's responsibilities.

     21.  REMOVAL OF PROPERTY.  Subject to Section 19.5 and any lien waiver
Landlord may execute in favor of lenders, upon the expiration or sooner
termination of the Lease, Tenant shall remove Tenant's personal property not
permanently affixed to the Premises and the Property as specified on Exhibit C-
1, and shall pay Landlord any damages for injury to the Premises or Property
resulting from such removal. If Tenant fails to remove any such property from
the Premises at the termination of this Lease or when Landlord has the right of
re-entry, Landlord may remove and store said property without liability for loss
thereof or damage thereto, provided Landlord uses commercially reasonable
standards in performance of such removal rights. Such storage shall be for the
account and at the expense of Tenant. If Tenant fails to pay the cost of storing
any such property after it has been stored for a period of thirty (30) days or
more, Landlord may, at its option, sell, or permit to be sold, any or all such
property at public or private sale, in such manner and at such times and places
as Landlord in its sole discretion may deem proper, without notice to Tenant,
unless notice is required under applicable statutes, and shall apply the
proceeds of such sale first, to the cost and expense of such sale, including
reasonable attorneys' fees actually incurred; second, to the payment of the
costs or charges for storing any such property; third, to the payment of any
other sums of money which may then be or thereafter become due Landlord from
Tenant under any of the terms of this Lease; and, fourth, the balance, if any,
shall be paid to Tenant.

     Landlord agrees to execute the Landlord's Waiver in the form attached as
Exhibit G in favor of a Union Bank of California. Landlord further agrees to
execute at the request of Tenant a Landlord's Waiver in substantially the same
form and content to any lender who holds a security interest in some or all of
the personal Property of Tenant.

     22.  CONDEMNATION.

          22.1 Entire Taking.  If all of the Premises, or such portion of the
Building as may be required for the reasonable use of the Premises, in
Landlord's determination, are taken by eminent domain, this Lease shall
automatically terminate as of the date title vests in the condemning authority
and all Rent, Additional Rent and other payments shall be paid to that date.

                                       22
<PAGE>

          22.2 Constructive Taking of Entire Premises.  In the event of a taking
by eminent domain of a material part of but less than all of the Building, if
Landlord determines that the remaining portions of the Building cannot be
economically and effectively used by it (whether on account of physical,
economic, aesthetic or other reasons) or if Landlord determines the Building
should be restored in such a way as to materially alter the Premises, then
Landlord shall forward a written notice to Tenant of such determination not more
than sixty (60) days after the date of taking. The term of this Lease shall
expire upon the date specified by Landlord in such notice but not earlier than
sixty (60) days after the date of such notice.

          22.3 Partial Taking.  Subject to the provisions of the preceding
Section 22.2, in case of taking by eminent domain of a part of the Premises, or
a portion of the Building not required for the reasonable use of the Premises,
then this Lease shall continue in full force and effect and the Rent shall be
equitably reduced based on the proportion by which the floor area of the
Premises is reduced, such Rent reduction to be effective as of the date title to
such portion vests in the condemning authority. If more than twenty-five percent
(25%) of the Premises is taken and Landlord cannot replace such space with space
in the Building which is mutually acceptable to Landlord and Tenant, then with
sixty (60) days written notice by either party, Landlord or Tenant shall have
the right to terminate this Lease.

          22.4 Awards and Damages.  Landlord reserves all rights to damages to
the Premises for any partial, constructive, or entire taking by eminent domain,
and Tenant hereby assigns to Landlord any right Tenant may have to such damages
or award, and Tenant shall make no claim against Landlord or the condemning
authority for damages for termination of the leasehold interest or interference
with Tenant's business. Tenant shall have the right, however, to claim and
recover from the condemning authority compensation for any loss to which Tenant
may be put for Tenant's moving expenses, business interruption or taking of
Tenant's personal property (not including Tenant's leasehold interest) provided
that such damages may be claimed only if they are awarded separately in the
eminent domain proceedings and not out of or as part of the damages recoverable
by Landlord.

     23.  NOTICES.  All notices under this Lease shall be in writing and
delivered in person or sent by registered or certified mail, postage prepaid, or
by facsimile, to Landlord and to Tenant at their respective Notice Addresses set
forth in Section 1.16 (provided that after the Commencement Date any such notice
shall be mailed, delivered by hand or transmitted by facsimile to Tenant at the
Premises) or such other addresses as may from time to time be designated by any
such party in writing. Notices mailed as provided in this Section shall be
deemed given and received on the date that is three (3) business days following
the date of post mark, in the case of mailing, or the date of transmission
confirmation by the sender's facsimile machine, in the case of facsimile
transmission.

     24.  COSTS AND ATTORNEYS' FEES.  If Tenant or Landlord bring any action for
any relief against the other, declaratory or otherwise, arising out of this
Lease, each party shall, and hereby does to the extent permitted by law, waive
trial by jury and the losing party shall pay the substantially prevailing
party's attorneys' fees in connection with such suit, at trial and on appeal,
and such attorneys' fees shall be deemed to have accrued on the commencement of
such action.

     25.  LANDLORD'S LIABILITY.  Notwithstanding anything in this Lease to the
contrary, covenants, undertakings and agreements herein made on the part of
Landlord in this Lease are made and intended not as personal covenants,
undertakings and agreements for the purpose of binding Landlord personally or
the assets of Landlord except Landlord's interest in the Premises and Building
and rents and proceeds thereof, but are made and intended for the purpose of
binding only the Landlord's interest in the Premises and Building, as the same
may from time to time be encumbered. No personal liability or personal
responsibility is assumed by Landlord, nor shall at any time be asserted or
enforceable against Landlord or its heirs, legal representatives, successors or
assigns on account of the Lease or on account of any covenant, undertaking or
agreement of Landlord in this Lease.

                                       23
<PAGE>

     26.  LANDLORD'S CONSENT.  Except as may be provided otherwise in this
Lease, whenever Landlord's consent is required under this Lease, such consent
shall not be unreasonably withheld, conditioned or delayed, provided, however,
Landlord's withholding of consent due to any mortgagee's refusal to grant its
consent shall not be deemed unreasonable.

     27.  ESTOPPEL CERTIFICATES.  Tenant shall, from time to time upon the
written request of Landlord, execute, acknowledge and deliver to Landlord or its
designee a written statement stating: the Effective Date, Commencement Date and
Expiration Date, the date the term commenced and the date Tenant accepted the
Premises; the amount of Base Rent and the date to which such Base Rent has been
paid; and certifying such additional information as may be requested by
Landlord. It is intended that any such statement delivered pursuant to this
Section may be relied upon by a prospective purchaser of Landlord's interest or
assignee of any mortgage upon Landlord's interest in the Building. If Tenant
shall fail to respond within ten (10) days of receipt by Tenant of a written
request by Landlord as herein provided, Tenant shall be deemed to have given
such certificate as above provided without modification and shall be deemed to
have admitted the accuracy of any information supplied by Landlord to a
prospective purchaser or mortgagee and to have certified that this Lease is in
full force and effect, that this Lease represents the entire agreement between
the parties as to this leasing, that there are no existing claims, defenses or
offsets which Tenant has against enforcement of the Lease by Landlord, that
there are no uncured defaults in Landlord's performance, that the security
deposit is as stated in the Lease, and that not more than one month's Base Rent
or Additional Rent has been paid in advance.

     28.  RIGHT TO PERFORM.  If Tenant fails to pay any sum of money required to
be paid by it under this Lease or fails to perform any other act on its part to
be performed under this Lease, and such failure continues for ten (10) days
after notice thereof by Landlord, Landlord may, but shall not be obligated so to
do, and without waiving or releasing Tenant from any obligations of Tenant, make
such payment or perform any such other act on Tenant's part to be made or
performed as provided in this Lease. Landlord shall have (in addition to any
other right or remedy of Landlord) the same rights and remedies in the event of
the nonpayment of sums due under this Section 28 as in the case of default by
Tenant in the payment of Rent.

     29.  PARKING.  Landlord shall provide Tenant thirty (30) unassigned parking
stalls, at no charge, in the parking area(s) servicing the Building, as outlined
on Exhibit E. The provision of parking stalls under this Lease shall be subject
to such rules and regulations as Landlord and/or Landlord's parking operator may
adopt from time to time. Landlord retains the right to alter such rules and
regulations and to relocate within the area as outlined on Exhibit E, or
reconfigure the parking area in which Tenant's parking stalls are located, with
reasonable notice to Tenant, but Landlord shall at all times continue to provide
the designated number of spaces to Tenant. Tenant shall pay, upon demand by
Landlord, Landlord's costs incurred to stencil any changes to reserved parking
stalls provided to Tenant under this Lease.

     30.  AUTHORITY.  If Tenant is a corporation, each individual executing this
Lease on behalf of Tenant represents and warrants that he or she is duly
authorized to execute and deliver this Lease on behalf of Tenant, in accordance
with a duly adopted resolution of the Board of Directors of Tenant and in
accordance with the bylaws of Tenant, and that this Lease is binding upon Tenant
in accordance with its terms. If Tenant is a partnership, each individual
executing this Lease on behalf of Tenant represents and warrants that he or she
is duly authorized to execute and deliver this Lease on behalf of Tenant, in
accordance with the partnership agreement of Tenant, and that this Lease is
binding upon Tenant in accordance with its terms.

     31.  GENERAL.

               31.1  Headings.  Titles to Sections of this Lease are not a part
of this Lease and shall have no effect upon the construction or interpretation
of this Lease.

                                       24
<PAGE>

               31.2  Heirs and Assigns.  All of the covenants, agreements, terms
and conditions contained in this Lease shall inure to and be binding upon the
Landlord and Tenant and their respective heirs, executors, administrators,
successors and assigns.

               31.3  No Brokers.  Except as provided in Section 1, Landlord and
Tenant represent and warrant to one another that they have not engaged any
broker, finder or other person who would be entitled to any commission or fees
in respect of the negotiation, execution or delivery of this Lease and Landlord
and Tenant shall indemnify and hold one another harmless from and against any
loss, cost, liability or expense incurred by the other party as a result of any
claim asserted by any such broker, finder or other person on the basis of any
arrangements or agreements made or alleged to have been made by or on behalf of
Tenant.

               31.4  Tenant's Financial Statement.  Within ten (10) days of
receipt by Tenant of Landlord's written request, Tenant shall deliver to
Landlord a copy of its most recent annual and quarterly financial statements
prepared in accordance with generally accepted accounting principles, including
a balance sheet, income statement, statement of changes in stockholder's equity,
statement of cash flow, accompanying footnotes, and reports of independent
accountants. Landlord shall hold Tenant's financial information in confidence
and agrees to execute a confidentiality agreement if so requested by Tenant.

               31.5  Entire Agreement.  This Lease contains all covenants and
agreements between Landlord and Tenant relating in any manner to the leasing,
use and occupancy of the Premises, to Tenant's use of the Building and other
matters set forth in this Lease. No prior agreements or understanding pertaining
to the same shall be valid or of any force or effect and the covenants and
agreements of this Lease shall not be altered, modified or added to except in
writing signed by Landlord and Tenant.

               31.6  Severability.  Any provision of this Lease which shall
prove to be invalid, void or illegal shall in no way affect, impair or
invalidate any other provision hereof and the remaining provisions hereof shall
nevertheless remain in full force and effect.

               31.7  Force Majeure.  Except for the payment of Rent, time
periods for Tenant's or Landlord's performance under any provisions of this
Lease shall be extended for periods of time during which Tenant's or Landlord's
performance is prevented due to circumstances beyond Tenant's or Landlord's
respective control, including without limitation, strikes, embargoes, shortages
of labor or materials, governmental regulations, acts of God, war or other
strife.

               31.8  Right to Change Public Spaces.  Landlord shall have the
right at any time without thereby creating an actual or constructive eviction or
incurring any liability to Tenant therefor, to change the arrangement or
location of such of the following as are not contained within the Premises or
any part thereof: entrances, passageways, doors and doorways, corridors, stairs,
toilets and other public portions of the Property. In no event, however, shall
Landlord diminish any service provided by Landlord under this Lease, make any
change which reduces the area of the Premises, make any change which, on other
than a temporary basis, either changes the character of the Building from that
of an office building or materially interferes with Tenant's access to and use
of the Building.

               31.9  Governing Law.  This Lease shall be governed by and
construed in accordance with the laws of the State of Washington.

               31.10 Building Directory.  In the event Landlord maintains in the
lobby of Building a directory of tenants, such directory shall include the name
of Tenant and any other names reasonably requested by Tenant in proportion to
the number of listings given to comparable tenants of the Building. Tenant will
also be required to provide suite signage consistent with the Building standard
or subject to Landlord's architects' approval.

                                       25
<PAGE>

               31.11 Building Name.  The Building will be known as International
Gateway or by such name as Landlord may designate from time to time.

               31.12 Quiet Enjoyment.  Landlord agrees that Tenant, upon paying
the Rent and performing all other terms, covenants and conditions of this Lease
to be performed by Tenant, may quietly have, hold and enjoy the Premises from
and after the Commencement Date until the Expiration Date, subject, however, to
the provisions of Section 11 (Damage Or Destruction), 22 (Condemnation), and to
any sale or Landlord's Mortgage to which this Lease is, or may become,
subordinate.

               31.13 Survival.  The representations, warranties and
indemnification obligations of the parties to this Lease shall survive the
termination or expiration of this Lease.

               31.14 Lender's Consent.  The effectiveness of this Lease is
contingent upon and subject to the approval of Landlord's lender.

                                       26
<PAGE>

     IN WITNESS WHEREOF this Lease has been executed the day and year first
above set forth.

                                   LANDLORD:
                                   DAVID A. and SANDRA L. SABEY

                                   __________________________________________
Date:____________________          David A. Sabey

                                   __________________________________________
Date:____________________          Sandra L. Sabey, by David A. Sabey, as her
                                          attorney-in-fact

                                   TENANT:

                                   PAC WEST TELECOMM, INC.

Date:____________________          By:_______________________________________
                                   Its:______________________________________

                                       27
<PAGE>

STATE OF WASHINGTON    )
                       ) ss.
COUNTY OF KING         )

     On this ______ day of __________________, 1999, before me, a Notary Public
in and for the State of Washington, personally appeared DAVID A. SABEY,
personally known to me to be the person who executed this instrument; on oath
stated that he was authorized to execute the instrument as attorney-in-fact for
his wife, SANDRA L. SABEY; acknowledged that he signed and sealed the same as
his free and voluntary act and deed for himself and as attorney-in-fact for said
principal for the uses and purposes therein mentioned; and on oath stated that
the Power of Attorney authorizing the execution of this instrument has not been
revoked and that the said principal is now living and is competent.

     IN WITNESS WHEREOF, I have hereunto set my hand and official seal the day
and year first written above.

                                   Printed Name:_____________________________
                                   NOTARY PUBLIC in and for the State of
                                   Washington, residing at __________________
                                   My commission expires:____________________

STATE OF CALIFORNIA      )
                         ) ss.
COUNTY OF __________     )

     On this _______ day of _________________, 1999, before me, the undersigned,
a Notary Public in and for the State of California, duly commissioned and sworn
as such, personally appeared __________________________________, to me known to
be the _______________ of PAC WEST TELECOMM, INC., the corporation that executed
the within and foregoing instrument, and acknowledged the said instrument to be
the free and voluntary act and deed of said corporation for the uses and
purposes therein mentioned, and on oath stated that he/she was authorized to
execute said instrument, and that the seal affixed is the corporate seal of said
corporation.

     WITNESS my hand and official seal the day and year in this certificate
first above written.

                                   Printed Name:
                                   NOTARY PUBLIC in and for the State of
                                   California, residing at __________________

                                       28
<PAGE>

                                   EXHIBIT A
                                      TO
                                LEASE AGREEMENT

                               LEGAL DESCRIPTION

                                      A-1
<PAGE>

                                   EXHIBIT B
                                      TO
                                LEASE AGREEMENT

                            FLOOR PLAN OF PREMISES

                                      B-1
<PAGE>

                                  EXHIBIT B-1
                                      TO
                                LEASE AGREEMENT

                          LOCATION OF "MEET-ME ROOM"

                                     B-1-1
<PAGE>

                                   EXHIBIT C
                                      TO
                                LEASE AGREEMENT

                       LANDLORD'S WORK AND TENANT'S WORK

I.   IMPROVEMENTS PROVIDED BY LANDLORD

     Construction/Base Building.

Description of 12201 Tukwila International Boulevard, Tukwila, Washington:

     This facility is a 4-story building meeting the requirements of
Construction Type II, 1 hour, sitting on top of a two-story open parking garage
meeting the requirements of Construction Type I.  The parking garage structure
and exterior wall is a concrete frame with pre-cast concrete floors.  The
structure for the office building is a braced steel-frame with concrete filled
steel deck floor system.  The exterior walls are metal stud framing faced with
Exterior Insulating and Finish System (EIFS).  There are areas of aluminum
curtainwall with vision glass and spandrel glass infill.  The aluminum windows
have fixed, tinted insulated glass units.  The ventilation system is a variable
volume forced air system with packaged roof mounted air handling units providing
heating and air conditioning.

     The base Building shell will consist of sheet rocked and fire taped
perimeter walls.  The mechanical system will be Tenant's responsibility.

     Landlord will provide Tenant with a total of 2000 amps, 480 volts, 3-phase
A/C of electric capacity dedicated to Tenant in the main panel in the Building.
Landlord will provide this service before November 26, 1999.

     In addition to the above work at Landlord's cost, Sabey Construction, Inc.
will perform the following work at Tenant's cost to be reimbursed to Landlord
through the Tenant Allowance.  These costs will be amortized at ten percent
(10%) per annum over the first seven (7) years of the Lease Term, and shall be
paid as Additional Rent.

     1)  Landlord will design and construct a generator enclosure which will
include a removable front wall with doors and louvers, concrete roof, built-up
roof,  acoustical baffles and all panels.  The conduit to the Building will also
be provided.  Tenant will be responsible for one-half (1/2) of the costs, which
cost to Tenant shall not exceed One Hundred Sixty-eight Thousand Dollars
($168,000).  Landlord will provide the generator enclosure before January 26,
2000.  If the cost to construct the generator enclosure shall equal One Hundred
Sixty-eight Thousand Dollars ($168,000), this Additional Rent payment shall
equal Two Thousand Eight Hundred Seventy-five and 68/100 Dollars ($2,875.68) per
month for months 1-84 of the Lease Term.

     2)  Landlord will increase the floor load capacity to one hundred (100)
pounds per square foot and one hundred fifty (150) pounds per square foot in the
areas attached as Exhibit 1.  This cost is not to exceed Eighty-five Thousand
Dollars ($85,000).  Landlord shall pay Tenant an amount of One Thousand Dollars
($1,000) per day as agreed liquidated damages for each day after October 10,
1999, that the floor capacity increase has not been completed, provided Tenant
has received a permit to construct the Tenant improvements.  If the cost to
upgrade the floor load shall equal Eighty-five Thousand Dollars ($85,000), this
Additional Rent payment shall equal One Thousand Four Hundred Fifty-four and
95/100 Dollars ($1,454.95) per month for months 1-84 of the Lease Term.

     3)  Landlord will perform the roof revision work necessary to accommodate
the 18 mechanical units necessary for Tenant.  This work will include adding
plates to strengthen

                                      C-2
<PAGE>

existing joints, adding beams to provide anchor points for additional screen
wall posts and braces, increasing the amount of screen wall, and providing
supports and repair roof at 18 mechanical units. This cost is not to exceed One
Hundred Fifteen Thousand Dollars ($115,000) . Tenant will be able to place units
on the roof of the Building by October 15, 1999, subject to a one day Base Rent
penalty for every day late, provided Tenant has received a permit to construct
the Premises. If the cost to perform the roof revisions shall equal One Hundred
Fifteen Thousand Dollars ($115,000), this Additional Rent payment shall equal
One Thousand Nine Hundred Sixty-eight and 47/100 Dollars ($1,968.47) per month
for months 1-84 of the Lease Term.

     Except for such Landlord's Work, Landlord shall deliver, and Tenant shall
accept the Premises in its "AS-IS" condition and configuration as provided in
the Lease.  Without limiting the foregoing, Landlord shall not be required to
modify or improve the existing heating, exhaust, ventilation or air-conditioning
equipment, to reinforce or level the flooring of the Premises or the existing
electrical system, to accommodate Tenant.

II.  CONSTRUCTION OF TENANT IMPROVEMENTS

A.   Improvements Constructed by Tenant.  If any work is to be performed in
connection with Tenant Improvements on the Premises by Tenant or Tenant's
contractor:

          (1) Such work shall proceed upon Landlord's written approval of (i)
Tenant's contractor, (ii) public liability and property damage insurance
satisfactory to Landlord carried by Tenant's contractor, and (iii) detailed
plans and specifications for such work.  Landlord's approval of the foregoing
shall not be unreasonably withheld or delayed.

          (2) All work shall be done in conformity with a valid building permit
when required, a copy of which shall be furnished to Landlord before such work
is commenced, and in any case, all such work shall be performed in accordance
with all applicable governmental regulations.  Notwithstanding any failure by
Landlord to object to any such work, Landlord shall have no responsibility for
Tenant's failure to meet all applicable regulations.

          (3) All work by Tenant or Tenant's contractor shall be scheduled
through Landlord.

          (4) (i) Tenant or Tenant's contractor shall arrange for necessary
utility, hoisting and elevator service with Landlord's contractor and shall pay
such reasonable charges for such services as may be charged by Landlord's
contractor; (ii) Tenant shall reimburse Landlord upon demand for any sums
expended by Landlord for examination and approval of plans and specifications
for any and all Alterations; and (iii) Tenant shall also pay Landlord a sum
equal to the costs incurred by Landlord during any inspection or supervision of
any and all Alterations.

          (5) Tenant shall promptly reimburse Landlord for costs incurred by
Landlord due to faulty work done by Tenant or its contractors, or by reason of
any delays caused by such work, or by reason of inadequate clean-up.

          (6) Prior to commencement of any work on the Premises by Tenant or
Tenant's contractor, Tenant and Tenant's contractor shall enter into an
indemnity agreement and a lien priority agreement satisfactory to Landlord
indemnifying and holding harmless Landlord and Landlord's contractor for any
liability, losses or damages directly or indirectly from lien claims affecting
the Land, the Building or the Premises arising out of Tenant's or Tenant's
contractor's work or that of subcontractors or suppliers, and subordinating any
such liens to the liens of construction and permanent financing for the
Building.

                                      C-2
<PAGE>

          (7) Landlord shall have the right to post a notice or notices in
conspicuous places in or about the Premises announcing its non-responsibility
for the work being performed therein.

     If Sabey Construction Inc. constructs the Tenant Improvements on behalf of
Tenant, Landlord acknowledges satisfaction of Paragraphs (1)(i), (1)(ii), 3,
4(i), 4(iii), 5, and 6.

     B.  Tenant's Entry to Premises.  Tenant's entry to the Premises for any
purpose, including without limitation, inspection or performance of Tenant
Construction by Tenant's agents, prior to the Commencement Date as specified in
Section 1.6 of the Lease shall be scheduled in advance with Landlord and shall
be subject to all the terms and conditions of the Lease, except the payment of
Rent.  Tenant's entry shall mean entry by Tenant, its officers, contractors,
office planner, licensees, agents, servants, employees, guests, invitees, or
visitors.

     C.  Tenant's Telephone.  Tenant is responsible for Tenant's telephone
service.  Tenant shall select Tenant's telephone system and shall coordinate its
installation with the Landlord.

     D.  Tenant's Staging Area.  Landlord shall provide Tenant with a staging
area near the Building during the construction of Tenant's Work in a mutually
agreeable area.  Tenant agrees to keep this area in a clean and orderly fashion.

                                      C-3
<PAGE>

                                   EXHIBIT 1
                                      TO
                                   EXHIBIT C

                             FLOOR LOAD CAPACITIES

                                      C-4
<PAGE>

                                  EXHIBIT C-1
                                      TO
                                LEASE AGREEMENT

                          TENANT'S REMOVABLE PROPERTY

     Subject to the terms and conditions of this Lease, the fixtures,
improvements, furniture, equipment and other property of Tenant which may be
removed by Tenant from the Premises at the expiration or earlier termination of
this Lease are as set forth below in this Exhibit C-1.  No other improvements,
alterations or property shall be removed from the Premises at the expiration or
termination of this Lease except as may be provided otherwise in the Lease or as
may be agreed upon by Landlord and Tenant and added to this Exhibit C-1 by
amendment to this Lease.

1.   Upon the termination or expiration of this Lease Tenant, at Tenant's
expense, shall remove all cabling and wiring included within the scope of
Tenant's Work, Landlord's Work, Tenant's Alterations, or which was otherwise
installed by Tenant, from all interstitial/ceiling plenum areas.

2.   Furniture, equipment and personal property.

3.   HVAC equipment, provided Tenant restores areas to a condition at least as
good as when received and removes all associated work if requested by Landlord,
which may include ducting, electrical runs and enclosures.

4.   All ALCATEL/DSC switch equipment and associated peripheral equipment, all
transmission switch equipment, patch panels and associated cables, Co-location
cabinets and associated equipment, all electrical equipment associated with this
equipment and including all battery and UPS power plan equipment.  Tenant must
leave the Premises in as good as condition as received, or patch and repair any
damage it creates through such removal.

                                     C-1-1
<PAGE>

                                   EXHIBIT D
                                      TO
                                LEASE AGREEMENT

                             RULES AND REGULATIONS

1.   Any directory provided by Landlord for the Building will be for the display
     of the name and location of tenants of the Building, and Landlord reserves
     the right to exclude any other names from inclusion in any such directory.

2.   Tenant shall not place any new or additional locks on any doors of the
     Premises or re-key any existing locks without the prior written consent of
     Landlord.

3.   Landlord reserves the right to exclude or expel from the common areas any
     person who, in the sole judgment of Landlord, is intoxicated, under the
     influence of drugs or who shall in any manner violate any of these Rules
     and Regulations.

4.   Tenant shall not do or permit to be done within the Premises, the building
     or parking loading or other adjoining common areas, anything which would
     unreasonably annoy or interfere with the rights of other tenants of the
     Building.

5.   Tenant shall not permit its employees or invitees to loiter in or about the
     common areas or obstruct any of the parking, truck maneuvering or other
     common areas, or to place, empty or throw away rubbish, litter, trash or
     material of any nature upon any common areas.

6.   No storage of materials, equipment or property of any kind is permitted
     outside the Premises unless otherwise approved in writing by Landlord and
     any such property may be removed by Landlord at Tenant's risk and expense.

7.   Tenant shall not make or permit any use of the Premises which in the sole
     judgment of Landlord, may be dangerous to persons or property; permit any
     noise, odor or vibrations to emit from the Premises which are objectionable
     to Landlord or other occupants of the Building; or to create, maintain or
     permit a nuisance or any violation of any regulation of any governmental
     agency thereon.

8.   Tenant shall not commit or permit to be committed any waste, damage or
     injury to the Premises, the Building or parking, loading and other common
     areas adjoining and shall promptly notify Landlord in writing of such
     waste, damage or injury and repair the same at its expense.

9.   Tenant understands that any equipment required for maintenance of the
     Premises is Tenant's responsibility and that Landlord has no equipment
     available for Tenant's use therefore (e.g. ladders or lifts for re-lamping,
     etc.).

10.  Tenant shall use the Premises and shall operate its equipment on the
     Premises in a safe and prudent manner, and any damage or cracks occurring
     in the floor of the Premises caused by Tenant shall be promptly brought to
     the attention of Landlord by written notice and repaired by Tenant at its
     expense.

11.  Tenant shall not at any time display a "For Rent" sign upon the Premises.

12.  Tenant shall be responsible for keeping a copy of the Lease and Landlord's
     current rules and regulations upon the Premises.

                                      D-1
<PAGE>

13.  Tenant agrees to cause its employees to park only in such designated areas
     as may be designated by Landlord from time to time for employee parking and
     shall abide by any rules or regulations concerning parking promulgated by
     Landlord, or Landlord's agent, from time to time.

14.  Tenant shall not waste electricity or water and agrees to cooperate fully
     with Landlord to assure the most effective and economical use of utilities
     services as may be provided to the Building by Landlord.

15.  Tenant shall keep Landlord advised of current telephone numbers of Tenant's
     employees who may be contacted in an emergency, i.e., fire, break-in,
     vandalism, etc., and shall also post such telephone numbers in a location
     which is clearly visible from the exterior of the Premises.  If Landlord
     shall deem it necessary, in its sole judgment, to respond to such emergency
     in Tenant's behalf, Tenant shall pay all costs incurred for services
     ordered by Landlord to secure or otherwise protect the Premises and the
     contents thereof, including a premium charge for any time spent by
     Landlord's employees in responding to such emergency.

16.  Tenant shall not smoke, and shall cause its employees, contractors, agents
     and invitees to refrain from smoking, in the Building except in such areas
     as may be designated as smoking areas by Landlord, if any.  In the event
     that Tenant desires to allow smoking in its Premises and such smoking is
     permitted under applicable laws, then Tenant, at Tenant's sole expense and
     subject to the requirements of Section 9 (Improvements And Alterations By
     Tenant), shall first take such action as may be necessary to have a smoke
     exhaust system installed in the Premises that is acceptable to Landlord.

17.  No pets or other animals are permitted on the Property, including the
     Premises, at any time except: (i) dogs which are present on the Property or
     Premises in their capacity of providing assistance to a disabled person;
     and (ii) laboratory animals of tenants leasing laboratory space and
     pursuant to terms agreed upon by Landlord in writing prior to such animals
     being brought onto the Property.

                                      D-2
<PAGE>

                                   EXHIBIT E
                                      TO
                                LEASE AGREEMENT

                                 PARKING AREA

                                      E-1
<PAGE>

                                   EXHIBIT F
                                      TO
                                LEASE AGREEMENT

                        EQUIPMENT AND OPERATING RIGHTS

This Exhibit F sets forth certain rights of Tenant and obligations of Landlord
with respect to the installation and operation of equipment and other
improvements in the Premises, the Building and other portions of the Property.
In the event this Exhibit F conflicts with any provision contained in the Lease
or other Exhibit thereto, the terms of this Exhibit F shall control.  Nothing
contained in this Exhibit shall be deemed to require Tenant to make any
improvements to the Premises, the Building or other portions of the Property,
and the exercise of any right to Tenant contained herein shall be subject to
Tenant's sole discretion, subject to Landlord's approval of plans and work
through the Lease and Exhibit C.  The following specifications are subject to
change, by Tenant based upon Tenant's final engineering plans.

Conduit/Riser Space:
-------------------

a)   Tenant shall have the right to construct dual telecommunications entrances
     to the Building for the purposes of redundancy.  These entrances should be
     separated by 100 feet or be located on different walls 50 feet apart.  The
     construction of such entrances may include the removal and replacement of
     curbing and/or sidewalks.

b)   Any conduit and cable installed by Tenant shall become the property of
     Landlord and shall be surrendered with the Premises upon the expiration of
     the Lease, or the cable must be removed if so requested by Landlord.

c)   Tenant shall have the right to core drill from the Premises to the lowest
     level of the Building necessary to install new conduit.  The scheduling of
     all core drilling shall be coordinated with Landlord, subject to approval
     and construction provisions in the Lease.

HVAC Systems:
------------

a)   Tenant shall have the right to install 200 tons of cooling capacity,
     through HVAC equipment on the Property outside of the Premises to serve the
     Premises, in the approximate location identified or to be identified on
     Attachment 1 hereto.

b)   Tenant shall have the right to remove or cap any heating system in the
     Premises.

c)   Tenant shall have the right to install drains for its HVAC equipment.

Electrical Systems:
------------------

a)   Landlord shall immediately make available 800 amps with Tenant being
     responsible for distribution to the floor.  No later than November 26,
     1999, Landlord shall provide Tenant with a total of 2000 amps, 480 volts,
     3-phase A/C of electric capacity dedicated to Tenant in the main panel room
     at Landlord's cost.  If Tenant shall require electric capacity in addition
     to the above, Tenant, at its expense, shall have the right with Landlord's
     cooperation and assistance, to make application directly to the public
     utility serving the Building.

b)   Tenant shall have the right to install a generator plug on the outside of
     the Building  in a mutually agreeable location, for the purpose of
     connecting the Premises to a portable generator in the event of a Building
     power failure.

                                      F-1
<PAGE>

c)   Tenant shall be provided with adequate space outside of the Building to
     install one (1) one meg volt diesel generator in a mutually agreeable
     location on the southwest side of the Building.

d)   Tenant shall have the right to install an electrical ground in accordance
     with its equipment requirements and applicable laws.

e)   Tenant shall have the right to place a DC Power Plant with associated
     batteries within the Premises.

Structural:
----------

a)   Tenant requires floor loading capacity as follows:
     Equipment: 100 lbs/usable square foot
     Battery:   150 lbs/usable square foot
     Office:    75 lbs/usable square foot

b)   Tenant shall have the right to reinforce the floor load capacity, if
     necessary.

c)   Tenant shall have the right to block up, from within the Premises, the
     windows in the Premises.

d)   Tenant agrees to cooperate with Landlord to reinforce the load capacity of
     the floor directly above the Premises.  This may include modifying or
     adding additional structure in the ceiling of the Premises.

Life Safety:
-----------

a)   Tenant shall have the right to install an FM200 fire suppression system
     independent of the Building's systems.  Such system shall be connected to
     the Building's life safety system, if compatible.

b)   Tenant shall have the right to convert existing wet pipe sprinkler system
     in the Premises to a Dry Pipe pre Action System in accordance with current
     codes if approved.

Antenna:
-------

a)   Tenant may install, at its expense, a monopole or self supporting microwave
     tower as well as related base site cabinets in connection with such antenna
     which will require up to 200 square feet of area and up to twelve (12)
     conduits measuring approximately 2" in diameter each from such base site
     cabinets to the telecommunication entrances of the building.  Any
     installation shall be subject to Landlord's approval of the size, design,
     installation, and appearance, such approval not to be unreasonably withheld
     or delayed.

b)   Tenant shall have the right to install a mast mounted GPS Antenna on the
     roof connected via a 3" conduit to Tenants lease space.

Other:
-----

a)   Tenant and its affiliates shall have the right to provide
     telecommunications services to other tenants in the building and/or any
     other buildings owned by Landlord or its affiliates.  Such right shall not
     be deemed to be an exclusive right to provide such services and any tenant
     shall be free to choose  any telecommunication providers of their choice.

b)   Tenant shall have the right to place the telecommunications equipment of
     its customers on the Premises (i.e. "Co-location" as such term is used in
     the telecommunications

                                      F-2
<PAGE>

     industry) and such Co-location shall not be deemed an assignment or
     sublease whether or not a written agreement exists between the parties.

c)   Tenant and its affiliates shall have the right to install conduit and fiber
     optic cabling to other buildings owned by Landlord.

d)   Tenant shall have the right to remove any or all of its equipment,
     including generators, HVAC, batteries, UPS systems, etc. at any time during
     the term of the lease.

e)   Tenant shall have the right to install its own alarm and security system.
     This shall include the right to install security card readers for all entry
     doors to the space.

                                      F-3
<PAGE>

                                ATTACHMENT 1 TO
                                   EXHIBIT F

                          LOCATION OF HVAC EQUIPMENT

                                TO BE PROVIDED

                                      F-4
<PAGE>

                                ATTACHMENT 2 TO
                                   EXHIBIT F

                             LOCATION OF GENERATOR

                                TO BE PROVIDED

                                      F-5
<PAGE>

                                   EXHIBIT G
                                      TO
                                LEASE AGREEMENT

                            LANDLORD'S LIEN WAIVER

                                TO BE PROVIDED

                                      G-1
<PAGE>

                                   EXHIBIT H
                                      TO
                                LEASE AGREEMENT

                              MEMORANDUM OF LEASE

AFTER RECORDING RETURN TO:
-------------------------

John Sabey
Sabey Corporation
101 Elliott Avenue West, Suite 330
Seattle, WA 98119-4220

--------------------------------------------------------------------------------

                              MEMORANDUM OF LEASE
                              -------------------

     This Memorandum of Lease ("Memorandum") is made as of this _______ day of
___________________, 1999, by and between David A. and Sandra L. Sabey, husband
and wife ("Landlord") as Landlord, and Pac-West Telecomm, Inc., a California
corporation ("Tenant"), as Tenant, who agree as follows:

     1.   Lease Term and Premises. Landlord has leased to the Tenant, and Tenant
          -----------------------
has leased from Landlord, pursuant to a Lease Agreement dated _______, 1999 (the
"Lease"), a portion of the real property located in the City of Tukwila, King
County, Washington, legally described in Exhibit A attached to this Memorandum
                                         ---------
(the "Premises"), for an initial term of ten (10) years, commencing November 1,
1999, and ending October 31, 2009.  Tenant has two (2) consecutive five (5) year
options to renew the term of the Lease.  The provisions of the Lease are
incorporated into this Memorandum.

     2.   Purpose of Memorandum.  This Memorandum is prepared for the purpose of
          ---------------------
recordation to give notice of the Lease.  It shall not constitute an amendment
or modification of the Lease.

     Executed as of the date first above written.

     LANDLORD:      David A. and Sandra L. Sabey

                    ________________________________
                    David A. Sabey

                    ________________________________
                    Sandra L. Sabey by David A. Sabey, as
                    her attorney-in-fact

     TENANT:        Pac-West Telecomm, Inc.

                    By:_____________________________
                    Its:____________________________

                                      H-1
<PAGE>

STATE OF WASHINGTON )
                    ) ss.
COUNTY OF KING      )

     On this ______ day of __________________, 1999, before me, a Notary Public
in and for the State of Washington, personally appeared DAVID A. SABEY,
personally known to me to be the person who executed this instrument; on oath
stated that he was authorized to execute the instrument as attorney-in-fact for
his wife, SANDRA L. SABEY; acknowledged that he signed and sealed the same as
his free and voluntary act and deed for himself and as attorney-in-fact for said
principal for the uses and purposes therein mentioned; and on oath stated that
the Power of Attorney authorizing the execution of this instrument has not been
revoked and that the said principal is now living and is competent.

     IN WITNESS WHEREOF, I have hereunto set my hand and official seal the day
and year first written above.

                              Printed Name:___________________
                              NOTARY PUBLIC in and for the State of
                              Washington, residing at______________
                              My commission expires:_______________
STATE OF CALIFORNIA )
                    ) ss.
COUNTY OF _________ )

     On this _____ day of ___________, 1999, before me, the undersigned, a
Notary Public in and for the State of California, duly commissioned and sworn,
personally appeared _____________________________, to me known to be the
________________________ of PAC-WEST TELECOMM, INC., the corporation that
executed the within and foregoing instrument, and acknowledged the said
instrument to be the free and voluntary act and deed of said corporation for the
uses and purposes therein mentioned, and on oath stated that he/she was
authorized to execute said instrument, and that the seal affixed is the
corporate seal of said corporation.

     WITNESS my hand and official seal the day and year in this certificate
first above written.

                         __________________________________
                         NOTARY PUBLIC in and for the State of California,
                         residing at ________________.
                         Printed Name:_______________________
                         My commission expires:______________

                                      H-2
<PAGE>

                                   EXHIBIT A
                                      TO
                              MEMORANDUM OF LEASE

                               LEGAL DESCRIPTION
<PAGE>

                                   EXHIBIT I
                                      TO
                                LEASE AGREEMENT

       SUBORDINATION, NON-DISTURBANCE, ESTOPPEL AND ATTORNMENT AGREEMENT

                                      I-1

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