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ADDENDUM    
    
    FOR    
    
    ASYNCHRONOUS TRANSFER MODE (ATM) SERVICE    
  

        This Addendum for Asynchronous Transfer Mode (ATM) Service (the "Addendum") is made as of the 8th day of May,
2000, to that certain Digital Services Agreement made by and between WorldCom Network Services, Inc. ("MCI WorldCom") and Ciera Network Systems, Inc.
("Customer"), dated as of May 8th, 2000 (the "DSA"), more specifically described as DSA # CNS - 000508.
The DSA and this Addendum shall collectively be referred to as the "Agreement". All of the terms and conditions contained in the DSA (including without
limitation, payment of charges, suspension of service, force majeure, service warranty, limitation of liability and indemnity) will apply to ATM Service (as defined herein) to be provided by MCI
WorldCom to Customer and where applicable, references to Service in the DSA will be deemed to include ATM Service. In the event of any conflict between the terms of the DSA and the terms of this
Addendum, the terms of this Addendum shall control. As of the first date written above, (i) all existing agreements for ATM Service between Customer (including Customer's parent company, Company's
subsidiaries and other entities under common control with Customer) and MCI WorldCom (including MCI WorldCom's parent company, MCI WorldCom's subsidiaries and other entities under common control with
MCI WorldCom) will be terminated and of no further force or effect except for charges or credits due for ATM Services provided prior to such date, and (ii) all ATM Service being provided to the
Customer Group by member(s) of the MCI WorldCom Group will be provisioned and maintained under the terms of this Addendum. 

        1.    Service To Be Provided.    

(A)    "ATM Service"  is a public data networking service which can support multiple service and application classes, such as, voice, data,
imaging and video. ATM protocol uses fixed length packets (cells) to transport user data across the MCI WorldCom network. Connectivity to the MCI WorldCom
network includes three (3) components: (1) local access, (2) port connection, and (3) permanent virtual connections (PVCs). The ATM port connection provides a gateway into the ATM Service and
allocates available capacity on MCI WorldCom's network to the virtual connections it supports. ATM Service supports ports at the DS-1 level (1.536 Mbps) and the DS-3 level (44.736 Mbps). ATM Service
support at the OC-3 level (155.52 Mbps) will be determined on an individual case basis. The PVC bandwidth for the different levels of ATM Service is based on the following parameters: 

	•
	Variable
Bit Rate (VBR)—Sustained Cell Rate (SCR)

	•
	Constant
Bit Rate (CBR)—Peak Cell Rate (PCR)

	•
	Available
Bit Rate—Minimum Cell Rate (MCR) 

The
greatest value at which a single PVC may be set depends on the port speed and local access options available. No single PVC bandwidth may exceed the originating (ingress) or terminating (egress)
port speed. Maximum PVC bandwidth for the various port speed connections is as follows: 

	Port Speed
	 	Maximum PVC Bandwidth

	DS-1	 	1.536 Mbps
	DS-3	 	25.6 Mbps
	OC-3	 	25.6 Mbps

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For
all port speed connections, the total PVC bandwidth cannot exceed 200% of the port speed. MCI WorldCom offers the following PVC speeds for the port speed connections listed: 

	Port Speed
	 	PVC Speeds

	DS-1 Level	 	16 Kbps, 32Kbps, 48Kbps, 64Kbps

plus all 64Kbps increments up to 1.536Mbps
	DS-3 Level	 	16 Kbps, 32Kbps, 48Kbps, 64Kbps

plus all 64Kbps increments up to 25.6Mbps
	OC-3 Level	 	Determined on an individual case basis

(B)
MCI WorldCom will install and operate ATM Service over transmission facilities provided by MCI WorldCom or third parties. Termination points in the cities within the 48 contiguous United States
("Domestic Network Nodes") will each be comprised of a port connection and the associated PVCs which provide the logical connectivity between the port
connections. Customer acknowledges that MCI WorldCom may from time to time modify Schedule 1 which will be deemed to incorporate such modifications. MCI WorldCom agrees to provide ATM Service subject
to availability as determined solely by MCI WorldCom and subject to the following conditions based on the level of local access described. 

(i)
ATM Service with DS-1 local access will be provided from MCI WorldCom's POPs located in those Tier A and Tier C Cities listed on Schedule 2 attached hereto and incorporated herein by reference.
Customer acknowledges that MCI WorldCom may from time to time modify Schedule 2 which will be deemed to incorporate such modifications. With respect to such Service, "backhaul" from MCI WorldCom's POP
in a Tier A or Tier C City to the appropriate Domestic Network Node will be determined by MCI WorldCom in its sole discretion and will be provided at no cost to Customer. 

(ii)
ATM Service with DS-3 local access will be provided from MCI WorldCom's POPs located in Tier A and Tier C Cities. With respect to such Service from a Tier C City, Customer shall, at Customer's
sole cost, provide a private line circuit ("IXC Connecting Leg") between MCI WorldCom's POP in such Tier C City and MCI WorldCom's POP in the nearest
Tier A City. Further, "backhaul" from MCI WorldCom's POP in a Tier A City to the appropriate Domestic Network Node will be determined by MCI WorldCom in its sole discretion and will be provided at no
cost to Customer. 

(iii)
ATM Service with OC-3 local access will be provided if available as determined solely by MCI WorldCom. With respect to such Service, Customer shall, at Customer's sole cost, provide local access
service and an IXC Connecting Leg between Customer's location and the nearest Domestic Network Node. 

(C)
Upon Customer's request, MCI WorldCom will provide provisioning and the initial testing of an interconnection between ATM Service provided by MCI WorldCom or a third party, and Customer's end-user
designated termination point and/or service ("Local Access Service"). Recurring and non-recurring charges for Local Access Service, including MCI
WorldCom's local access coordination fee, shall be established upon MCI WorldCom's acceptance of each Service Order. MCI WorldCom shall be responsible for the ordering, installing, provisioning,
testing and maintenance of all Local Access Services; provided, however, Customer may notify MCI WorldCom that it will be responsible for such Local Access Services. Any third party charges, including
but not limited to charges from local access providers, incurred by or charged to MCI WorldCom in connection with the provision of ATM Service shall be paid by Customer. 

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(D)
"Ancillary Services" are those one-time Service Order administrative and non-administrative requests or changes ordered by Customer, including but
not limited to, expediting and cancellation prior to the end of the Service Order Term (as defined below). Recurring and non-recurring charges for Ancillary Services shall be established by MCI
WorldCom upon MCI WorldCom's acceptance of each Service Order. 

        2.    Term.    This Addendum shall be effective between the parties as of the date first written above and shall
continue month-to-month (the "ATM Term"). 

        3.    Commitment.    Commencing                        and
continuing through the end of the ATM Term (the  "ATM Commitment Period"), Customer agrees to obtain, on a take-or-pay basis, ATM Monthly Port Charges (as described in Subsection 4(i) below) PLUS ATM
Monthly PVC Charges (as described in Subsection 4(ii) below) PLUS Customer's Monthly Port Charges and Customer's Monthly CIR Charges, if any, from MCI WorldCom pursuant to an Addendum for Frame Relay
Service PLUS Customer's Integrated Internet Access Monthly Recurring Charges, if any, from MCI WorldCom pursuant to an Addendum for Integrated Internet Access Service (collectively,  "Customer's Applicable ATM
Charges") of at least * ("Customer's ATM Commitment"). In the event Customer
does not maintain Customer's ATM Commitment in any month during the ATM Commitment Period, then for such month(s) Customer will pay MCI WorldCom the difference between Customer's ATM Commitment and
Customer's Applicable ATM Charges (the "ATM Deficiency Charge"). The ATM Deficiency Charge, if applicable, will be due at the same time payment is due
for Service provided to Customer or immediately upon expiration of the ATM Term. MCI WorldCom agrees to include Customer's ATM Monthly Port Charges and Customer's ATM Monthly PVC Charges in
determining if Customer has met any private line take-or-pay commitment(s) Customer has with MCI WorldCom. 

        4.    MCI WorldCom's Charges for ATM Service.    In addition to the cost of any IXC Connecting Legs as described in
Subsection 1(B) above, Customer agrees to pay the following charges for ATM Services provided by MCI WorldCom hereunder. All payments shall be made in US Dollars. 

	(i)
	Monthly
recurring charges based on the port speed at each Network Node ("ATM Monthly Port Charges") as
shown in the schedule below. 

	Port Speed
	 	Monthly Port Charges

	

DS-1 Level	
 	

*
	DS-3 Level	 	*
	OC-3 Level	 	*

	(ii)
	Monthly
recurring charges based on the total PVC bandwidth (i.e., "percent of subscription") of all PVCs going out from a Network Node to a Network Node
(the "ATM Monthly PVC Charges") as shown below. If PCR is set greater than 200% over SCR or MCR, Customer will be charged an additional * per 64Kbps. 

	Total CIR
	 	VBR*
	 	ABR*
	 	CBR

	

16Kbps	
 	

*	
 	

*	
 	

*
	32Kbps	 	*	 	*	 	*
	48Kbps	 	*	 	*	 	*
	64Kbps	 	*	 	*	 	*

	*
	Per
each 64Kbps above initial 64Kbps 

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	(iii)
	Non-recurring
port connection charges of * per PVC plus the following charge based on the port speed
with respect to ports in the 48 contiguous United States as shown below (the "ATM Installation Charge"). Customer will be subject to a * charge for each
PVC change. 

	Port
	 	Installation Charge

	

DS-1 Level	
 	

*
	DS-3 Level	 	*
	OC-3 Level	 	*

	(iv)
	Non-recurring
and monthly recurring local access and interconnection charges to be determined on an individual case basis.

	(v)
	Ancillary
Services charges, if applicable, as shown below: 

	Description
	 	Charge

	Expedite Charge (per Port)	 	*
	Cancellation Charge-Pre-Engineering (per Port)	 	*
	Cancellation Charge-Post-Engineering (per Port)	 	*
	Date Change (per Port)	 	*
	Administrative Order Change (per port)	 	*
	Non-Administrative Order Change-Pre-Engineering (per Port)	 	*
	Non-Administrative Order Change-Post-Engineering (per Port)	 	*

	(vi)
	Subject
to Subsection (vii) below, Customer's ATM Monthly Port Charges and Customer's ATM Monthly PVC Charges (as described in Subsections 4(i) and
4(ii) above) will be subject to the following discounts based on *. Commencing with the month following the month in which * equals the next level, * 

        *

        *

	(vii)
	In
 the event Customer's ATM Term is at least twelve (12) months, Customer's ATM Monthly Port Charges and Customer's ATM Monthly PVC Charges (as
described in Subsection 4(i) and 4(ii) above) will be subject to the following discounts based on *. Customer's discount determined under this Subsection (vii) (1) will commence as of the Effective
Date of this Addendum, (2) will continue through the end of the ATM Term, and (3) will not be subject to increase throughout the ATM Term. 

        *

        *

        5.    Other Terms and Conditions.    Except to the extent specifically modified by this Addendum, all terms and
conditions contained in the DSA and any other Addenda applicable thereto shall remain in full force and effect and shall not be altered, modified, amended or changed. 

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        IN WITNESS WHEREOF the parties have executed this Addendum for ATM Service as of the date first written above. 

	CIERA NETWORK SYSTEMS, INC.	 	MCI WORLDCOM NETWORK SERVICES, INC.
	

By:	
 	

/s/ R.W. Livingston
 (Signature)	
 	

By:	
 	

/s/ James J. Foran
 (Signature)
	

R.W. Livingston
 (Print Name)	
 	

James J. Foran
 (Print Name)
	

CEO            5/8/2000
 (Title)	
 	

Regional Sales Director
 (Title)

Schedules:

        Schedule 1
Tier A and Tier C Cities 

        *

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        *
12 pages 

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MCI WORLDCOM NETWORK SERVICES, INC.    
    
    TELECOMMUNICATIONS SERVICES AGREEMENT
  (Switched Services)    
  

        This Telecommunications Services Agreement (the "TSA") is entered
into as of the 8th day of May, 2000, by and between MCI WORLDCOM Network Services, Inc. (successor in interest to WorldCom Network Services, Inc.), a
Delaware corporation, with its principal office at 6929 North Lakewood Avenue, Tulsa, Oklahoma 74117 ("MCI WorldCom") and Ciera Network Systems, Inc., a
Texas corporation, with its principal office at 2630 Fountainview, Houston Texas 77057 ("Customer"). 

        In
consideration of good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties agree as follows: 

        1.    Switched Services; Other Documents; Start of Service.    

        (A)    Services    MCI WorldCom agrees to provide and Customer agrees to accept and pay for switched
telecommunications services and other associated services (collectively the "Switched Services") as further described in the
"Attachments" attached hereto and incorporated herein by reference, which describe the particular services, rates, specific terms and other information
necessary or appropriate for MCI WorldCom to provide the Switched Services to Customer. The Switched Services provided by MCI WorldCom are subject to (i) the terms and conditions contained in
this TSA and the Program Enrollment Terms (the "PET") which is attached hereto and incorporated herein by reference, (ii) the rates and discounts
and other applicable terms set forth in Attachment(s) attached hereto from time to time and incorporated herein by reference, and (iii) each Service Request (described below) which is accepted
hereunder. The PET, as subscribed to by the parties, shall set forth the Effective Date, the Service Term, Customer's minimum monthly commitment, if any, and other information necessary to provide the
Switched Services under this TSA. In the event of a conflict between the terms of this TSA, the PET, the Attachments and the Service Request(s), the following order of precedence will prevail:
(1) the PET, (2) the Attachments, (3) this TSA, and (4) Service Request(s). This TSA, the PET, and the applicable Attachments are sometimes collectively referred to as the
"Agreement". 

        (B)    Service Requests    Customer's requests to initiate or cancel Switched Services shall be described in an
appropriate MCI WorldCom Service Request ("Service Request"). A Service Request may consist of machine readable tapes, facsimiles or other means
approved by MCI WorldCom. Further, Service Requests shall specify all reasonable information, as determined by MCI WorldCom, necessary or appropriate for MCI WorldCom to provide the Switched
Service(s) in question, which shall include without limitation, the type, quantity and end point(s) (when necessary) of circuits comprising a Service Interconnection as described in the applicable
Service Schedules, or automatic number identification ("ANI") information relevant to the Switched Service(s), the "Requested Service Date", and
charges, if any, relevant to the Switched Services described in the Service Request. 

        (C)    Start of Service    MCI WorldCom's obligation to provide and Customer's obligation to accept and pay for
non-usage sensitive charges for Switched Services shall be binding to the extent provided for in this Agreement upon the submission of an acceptable Service Request to MCI WorldCom by Customer.
Customer's obligation to pay for usage sensitive charges for Switched Services shall commence with respect to any Switched Service as of the date the Switched Service in question is made available to
and used by Customer ("Start of Service"), but in no event later than the "Requested Service Date" if
such Switched Service is available for Customer's use as of such Requested Service Date. Start of Service for particular Services shall be further described in the Attachment(s) relevant to the
Switched Services in question. 

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        2.    Cancellation.    

        (A)    Cancellation Charge    At any time after the Effective Date, Customer may cancel this Agreement if Customer
provides written notification thereof to MCI WorldCom not less than thirty (30) days prior to the effective date of cancellation. In such case (or in the event MCI WorldCom terminates this Agreement
as provided in Section 7), Customer shall pay to MCI WorldCom all charges for Services provided through the effective date of such cancellation plus a cancellation charge (the
"Cancellation Charge") equal to * of Customer's commitment(s), if any, (as described in the PET) that would have become due for the unexpired portion of
the Service Term. 

        (B)    Liquidated Damages    It is agreed that MCI WorldCom's damages in the event Customer cancels this Agreement
shall be difficult or impossible to ascertain. The provision for a Cancellation Charge in Subsection 2(A) above is intended, therefore, to establish liquidated damages in the event of a cancellation
and is not intended as a penalty. 

        (C)    Cancellation Without Charge    Notwithstanding anything to the contrary contained in Subsection 2(A) above,
Customer may cancel this Agreement, as provided below, without incurring any cancellation charge (other than payment for Services provided by MCI WorldCom up through the effective date of
cancellation) if (i) MCI WorldCom fails to provide a network as warranted in Section 8 below; (ii) MCI WorldCom fails to deliver call detail records promptly based on the frequency
selected by Customer (i.e., monthly, weekly or daily); or (iii) MCI WorldCom fails to submit ANI(s) relevant to Customer's Service Requests to the applicable local exchange companies
("LECs") within the time period described in applicable Attachment(s). Provided, however, Customer must give MCI WorldCom written notice of any such
default and an opportunity to cure such default within five (5) days of the notice. In the event MCI WorldCom fails to cure any such default within the five-day period on more than three (3) occasions
within any six (6) month period, Customer may cancel this Agreement without incurring any cancellation charge. 

        3.    Customer's End Users.    

        (A)    End Users    Customer will obtain, and upon MCI WorldCom's request provide MCI WorldCom (within two (2)
business days of the date of the request), a written Letter of Agency ("LOA") acceptable to MCI WorldCom (or with any other means if approved by the
Federal Communications Commission ("FCC"), the applicable public utility commission ("PUC") and the
applicable LEC), for each ANI indicating the consent of such end user of Customer ("End User") to be served by Customer and transferred (by way of
change of such End User's designated presubscribed interexchange carrier (PIC)) to the MCI WorldCom network prior to submitting a Service Request to MCI WorldCom. Each LOA will provide, among other
things, that the End User has consented to the transfer being performed by Customer or Customer's designee. When applicable, Customer will be responsible for notifying its End Users, in writing (or by
any other means if approved by the FCC, the applicable PUC and the applicable LEC) that (i) a transfer charge will be reflected on their LEC bill for effecting a change in their PIC,
(ii) the entity name under which their interstate, intrastate, local and/or operator services will be billed (if different from Customer), and (iii) the "primary" telephone number(s) to
be used for maintenance and questions concerning their telecommunications services and/or billing. Customer agrees to send MCI WorldCom a copy of the documentation Customer uses to satisfy the above
requirements promptly upon request of MCI WorldCom. MCI WorldCom may change the foregoing requirements for Customer's confirming orders and/or notifying End Users regarding the transfer charge at any
time in order to conform with applicable FCC and state regulations. Provided, however, Customer will be solely responsible for ensuring that the transfer of End Users to the MCI WorldCom network
conforms with applicable FCC and state regulations, including without limitation, the regulations established by the FCC with respect to verification of orders for long distance service generated by
telemarketing as promulgated in 47 C.F.R., Part 64, Subpart K, §64.1100 or any successor regulation(s). 

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        (B)    Transfer Charges/Disputed Transfers    Customer agrees that it is responsible for (i) all charges
incurred by MCI WorldCom to change the PIC of End Users to the MCI WorldCom network, (ii) all charges incurred by MCI WorldCom to change End Users back to their previous PIC arising from
disputed transfers to the MCI WorldCom network plus, at MCI WorldCom's option, an administrative charge equal to twenty percent (20%) of such charges, and (iii) any other damages or costs
suffered by or awards against MCI WorldCom resulting from disputed transfers. 

        (C)    Excluded ANIs    Customer agrees to provide all ANIs to be carried on the MCI WorldCom network prior to the
provisioning of such ANIs with the LECs. MCI WorldCom has the right to reject any ANI supplied by Customer for any of the following reasons: (i) MCI WorldCom is not authorized to provide or
does not provide long distance services in the particular jurisdiction in which the ANI is located, (ii) a particular ANI submitted by Customer is not in proper form, (iii) Customer is
not certified to provide long distance services in the jurisdiction in which the ANI is located, (iv) Customer is in material default of this Agreement, (v) Customer fails to cooperate
with MCI WorldCom in implementing reasonable verification processes determined by MCI WorldCom to be necessary or appropriate in the conduct of business, (vi) such ANI is rejected by a LEC
(e.g., "PIC freezes"), or (vii) any other circumstance reasonably determined by MCI WorldCom which could adversely affect MCI WorldCom's performance under this Agreement or MCI WorldCom's
general ability to transfer its other customers or other end users to the MCI WorldCom network, including without limitation, MCI WorldCom's ability to electronically effect PIC changes with the LECs.
In the event MCI WorldCom rejects an ANI, MCI WorldCom will notify Customer of its decision specifically describing the rejected ANI and the reason(s) for rejecting that ANI, and will not incur any
further liability under this Agreement with regard to that ANI. Further, any ANI previously requested by Customer for Switched Services may be deactivated by MCI WorldCom if no Switched Services
billings relevant thereto are generated in any three (3) consecutive calendar month/billing periods. MCI WorldCom will be under no obligation to accept ANIs submitted by Customer within the last full
calendar month period preceding the scheduled expiration of the Service Term. 

        (D)    Records    Customer will maintain documents and records
("Records") supporting Customer's re-sale of Switched Services, including, but not limited to, appropriate and valid documentation of each subscribing
End User's authorization to Customer to act as End User's PIC for a period of not less than twelve (12) months or such longer period as may be required by applicable law, rule or regulation. Customer
shall indemnify MCI WorldCom for any and all costs, charges or expenses incurred by MCI WorldCom arising from disputed PIC selections involving Switched Services to be provided to Customer. 

        (E)    Customer Service    Customer will be solely responsible for billing its End Users and providing such End Users
with customer service. Customer agrees to notify MCI WorldCom as soon as reasonably possible in the event an End User notifies Customer of problems associated with the Switched Services, including
without limitation, excess noise, echo, or loss of service. 

        4.    Customer's Responsibilities    

        (A)    Expedite Charges    In the event Customer requests expedited services and/or changes to Service Requests and
MCI WorldCom agrees to such request, MCI WorldCom will pass through the charges assessed by any supplying parties (e.g., local access providers) for such expedited charges and/or changes to Service
Requests involved at the same rate to Customer. MCI WorldCom may further condition its performance of such request upon Customer's payment of such additional charges to MCI WorldCom. 

        (B)    Fraudulent Calls    Customer shall indemnify and hold MCI WorldCom harmless from any and all costs, expenses,
damages, claims or actions arising from fraudulent calls of any nature which may comprise a portion of the Switched Services to the extent that the party claiming the call(s) in question to be
fraudulent is (or had been at the time of the call) an End User of such Switched Services 

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through Customer or an end user of the Switched Services through Customer's distribution channels. Customer shall not be excused from paying MCI WorldCom for Switched Services provided to Customer or
any portion thereof on the basis that fraudulent calls comprised a corresponding portion of the Switched Services. In the event MCI WorldCom discovers fraudulent calls being made (or reasonably
believes fraudulent calls are being made), nothing contained herein shall prohibit MCI WorldCom from taking immediate action (without notice to Customer) that is reasonably necessary to prevent such
fraudulent calls from taking place, including without limitation, denying Switched Services to particular ANIs or terminating Switched Services to or from specific locations. Provided, however,
nothing contained herein will impose any obligation on MCI WorldCom to take any action with respect to fraudulent calls. 

        5.    Charges and Payment Terms.    

        (A)    Payment    MCI WorldCom Billings for Switched Services hereunder are made on a monthly basis (or such other
basis as may be mutually agreed to by the parties) following Start of Service. Subject to Subsection 5(C) below, Switched Services shall be billed at the rates set forth in the applicable
Attachment(s). Discounts, if any, applicable to the rates for certain Services are set forth in the applicable Attachment(s). Customer will pay all undisputed charges relative to each MCI WorldCom
invoice for Switched Services within thirty (30) days of the invoice date set forth on each MCI WorldCom invoice to Customer ("Due Date"). If payment is
not received by MCI WorldCom on or before the Due Date, Customer shall also pay a late fee in the amount of the lesser of * of the unpaid balance of the charges for Switched Services rendered per
month or partial month that such payment is late, or the maximum lawful rate under applicable state law. 

        (B)    Taxes    Customer acknowledges and understands that MCI WorldCom computes all charges herein exclusive of any
applicable federal, state or local use, excise, gross receipts, sales and privilege taxes, duties, fees or similar liabilities (other than general income or property taxes), whether charged to or
against MCI WorldCom or Customer because of the Switched Services furnished to Customer ("Additional Charges"). Customer shall pay such Additional
Charges in addition to all other charges provided for herein. Customer will not be liable for certain Additional Charges if Customer provides MCI WorldCom with an appropriate exemption certificate. 

        (C)    Modification of Charges    MCI WorldCom reserves the right to eliminate particular Switched Services and/or
modify charges for particular Switched Services (which charge modifications shall not exceed then-current generally available MCI WorldCom charges for comparable services), upon not less than sixty
(60) days prior notice to Customer, which notice will state the effective date for the charge modification. In the event MCI WorldCom notifies Customer of the elimination of a particular Switched
Service and/or an increase in the charges, Customer may terminate this Agreement without incurring a cancellation charge (other than payment for Services provided by MCI WorldCom up through the
effective date of cancellation) only with respect to the Switched Service(s) affected by the
increase in charges. In order to cancel such Switched Service(s), Customer must notify MCI WorldCom, in writing, at least thirty (30) days prior to the effective date of the increase in charges. In
the event Customer cancels its subscription to a particular Switched Service as described in this Subsection 5(C), MCI WorldCom and Customer agree to negotiate in good faith concerning Customer's
minimum monthly commitment, if any, described in the PET. 

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        (D)    Billing Disputes    Notwithstanding the foregoing, amounts reasonably disputed by Customer (along with late
fees attributable to such amounts) shall apply but shall not be due and payable for a period of sixty (60) days following the Due Date therefor, provided Customer: (i) pays all undisputed
charges on or before the Due Date, (ii) presents a written statement and supporting documentation of any billing discrepancies to MCI WorldCom in reasonable detail on or before the Due Date of
the invoice in question, and (iii) negotiates in good faith with MCI WorldCom for the purpose of resolving such dispute within said sixty (60) day period. In the event such dispute is mutually
agreed upon and resolved in favor of MCI WorldCom, Customer agrees to pay MCI WorldCom the disputed amounts together with any applicable late fees within ten (10) days of the resolution (the
"Alternate Due Date"). In the event such dispute is mutually agreed upon and resolved in favor of Customer, Customer will receive a credit for the
disputed charges in question and the applicable late fees. In the event MCI WorldCom has responded to Customer's dispute in writing and the parties fail to mutually resolve or settle the dispute
within such sixty (60) day period (unless MCI WorldCom has agreed in writing to extend such period) all disputed amounts together with late fees shall become due and payable, and this provision shall
not be construed to prevent Customer from pursuing any available legal remedies. MCI WorldCom shall not be obligated to consider any Customer notice of billing discrepancies which are received by MCI
WorldCom more than sixty (60) days following the Due Date of the invoice in question. 

        6.    Credit: Creditworthiness:    

        (A)    Credit    Customer's execution of this Agreement signifies Customer's acceptance of MCI WorldCom's initial and
continuing credit approval procedures and policies. MCI WorldCom reserves the right to withhold initiation or full implementation of any or all Switched Services under this Agreement pending MCI
WorldCom's initial satisfactory credit review and approval thereof which may be conditioned upon terms specified by MCI WorldCom, including, but not limited to, security for payments due hereunder in
the form of a cash deposit or other means. MCI WorldCom reserves the right to modify its requirements, if any, with respect to any security or other assurance provided by Customer for payments due
hereunder in light of Customer's actual usage when compared to projected usage levels upon which any security or assurance requirement was based. 

        (B)    Creditworthiness    If at any time there is a material adverse change in Customer's creditworthiness, then in
addition to any other remedies available to MCI WorldCom, MCI WorldCom may elect, in its sole discretion, to exercise one or more of the following remedies: (i) cause Start of Service for
Switched Services described in a previously executed Service Request to be withheld; (ii) cease providing Switched Services pursuant to a Suspension Notice in accordance with
Section 7(A); (iii) decline to accept a Service Request or other requests from Customer to provide Switched Services which MCI WorldCom may otherwise be obligated to accept; and/or
(iv) condition its provision of Switched Services or acceptance of a Service Request on Customer's assurance of payment which shall be a deposit or such other means to establish reasonable
assurance of payment. An adverse material change in Customer's creditworthiness shall include, but not be limited to: (i) Customer's material default of its obligations to MCI WorldCom under
this or any other agreement with MCI WorldCom; (ii) failure of Customer to make full payment of all undisputed charges due hereunder on or before the Due Date (or disputed charges on or before
the Alternate Due Date) on three (3) or more occasions during any period of twelve (12) or fewer months or Customer's failure to make such payment on or before the Due Date (or the Alternate Due Date,
if applicable) in any two (2) consecutive months; (iii) acquisition of Customer (whether in whole or by majority or controlling interest) by an entity which is insolvent, which is subject to
bankruptcy or insolvency proceedings, which owes past due amounts to MCI WorldCom or any entity affiliated with MCI WorldCom or which is a materially greater credit risk than Customer; or,
(iv) Customer's being subject to or having filed for bankruptcy or insolvency proceedings or the legal insolvency of Customer. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

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        7.    Remedies for Breach.    

        (A)    Suspension of Service    In the event all undisputed charges due pursuant to MCI WorldCom's invoice are not
paid in full by the Due Date or disputed charges owed by Customer, if any, are not paid in full by the Alternate Due Date, MCI WorldCom shall have the right, after giving Customer at least five (5)
days prior notice and opportunity to pay such charges within such 5-day period, to suspend all or any portion of the Switched Services to Customer ("Suspension
Notice") until such time (designated by MCI WorldCom in its Suspension Notice) as Customer has paid in full all undisputed
charges then due to MCI WorldCom, including any late fees. Following such payment, MCI WorldCom shall reinstitute Switched Services to Customer only
when Customer provides MCI WorldCom with satisfactory assurance of Customer's ability to pay for such Switched Services (i.e., a deposit, letter of credit or other means acceptable to MCI WorldCom)
and Customer's advance payment of the cost of reinstituting such Switched Services. If Customer fails to make the required payment by the date set forth in the Suspension Notice, Customer will be
deemed to have canceled this Agreement as of the date set forth in the Suspension Notice which cancellation shall not relieve Customer for payment of the Cancellation Charge as described in
Section 2. 

        (B)    Disconnection of Service    In the event Customer is in material breach of this Agreement, including without
limitation, failure to pay all undisputed charges due hereunder by the date stated in the Suspension Notice described in Subsection 7(A) above, MCI WorldCom shall have the right, after giving
Customer at least five (5) days prior written notice and opportunity to cure (which notice may be given instead of or in conjunction with the Suspension Notice described in Subsection 7(A)
above), and in addition to foreclosing any security interest MCI WorldCom may have, to (i) disconnect all or any portion the Switched Services being provided hereunder and/or terminate this
agreement; (ii) withhold billing information from Customer; and/or (iii) contact the End Users (for whom calls are originated and terminated solely over facilities comprising the MCI
WorldCom network) directly and bill such End Users directly until such time as MCI WorldCom has been paid in full for the amount owed by
Customer. If Customer fails to make payment by the date stated in the Suspension Notice and MCI WorldCom, after giving Customer five (5) days prior written notice, terminates this Agreement as
provided in this Section 7, such termination shall not relieve Customer for payment of the Cancellation Charge as described in Section 2 above. 

        8.    Warranty.    MCI WorldCom will use reasonable efforts under the
circumstances to maintain its overall network quality. The quality of Switched Services provided hereunder shall be consistent with telecommunications common carrier industry standards, government
regulations and sound business practices. MCI WORLDCOM MAKES NO OTHER WARRANTIES ABOUT THE SWITCHED SERVICES PROVIDED HEREUNDER, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
TO, ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR USE.

        9.    Liability; General Indemnity; Reimbursement.    

        (A)    Limited Liability    IN NO EVENT WILL EITHER PARTY HERETO BE LIABLE TO THE OTHER PARTY
FOR ANY INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL LOSSES OR DAMAGES, INCLUDING WITHOUT LIMITATION, LOSS OF REVENUE, LOSS OF CUSTOMERS OR CLIENTS, LOSS OF GOODWILL OR LOSS OR PROFITS ARISING IN
ANY MANNER FROM THIS AGREEMENT AND THE PERFORMANCE OR NONPERFORMANCE OF OBLIGATIONS HEREUNDER.

        (B)    General Indemnity    In the event parties other than Customer (e.g., Customer's End Users) shall have use of
the Switched Services through Customer, then Customer agrees to forever indemnify and hold MCI WorldCom, its affiliated companies and any third-party provider or operator of facilities employed in
provision of the Switched Services harmless from and against any and all claims, demands, suits, actions, losses, damages, assessments or payments which those parties may assert arising out of or 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

6

 

relating to any defect in the Switched Services or MCI WorldCom's provision or nonprovision of Switched Services under this Agreement. 

        (C)    Reimbursement    Customer agrees to reimburse MCI WorldCom for all reasonable costs and expenses incurred by
MCI WorldCom due to MCI WorldCom's direct participation (either as a party or witness) in any administrative, regulatory or criminal proceeding concerning Customer if MCI WorldCom's involvement in
said proceeding is based solely on MCI WorldCom's provision of Switched Services to Customer. 

        10.    Force Majeure.    If MCI WorldCom's performance of this
Agreement or any obligation hereunder is prevented, restricted or interfered with by causes beyond its reasonable control including, but not limited to, acts of God, fire, explosion, vandalism, cable
cut, storm or other similar occurrence, any law,
order, regulation, direction, action or request of the United States government, or state or local governments, or of any department, agency, commission, court, bureau, corporation or other
instrumentality of any one or more such governments, or of any civil or military authority, or by national emergency, insurrection, riot, war, strike, lockout or work stoppage or other labor
difficulties, or supplier failure, shortage, breach or delay, then MCI WorldCom shall be excused from such performance on a day-to-day basis to the extent of such restriction or interference. MCI
WorldCom shall use reasonable efforts under the circumstances to avoid or remove such causes of nonperformance and shall proceed to perform with reasonable dispatch whenever such causes are removed or
cease. 

        11.    State Certification.    Customer warrants that in all
jurisdictions in which it provides long distance services that require certification, it has obtained the necessary certification from the appropriate governmental authority and, if requested by MCI
WorldCom, agrees to provide proof of such certification acceptable to MCI WorldCom. In the event Customer is prohibited, either on a temporary or permanent basis, from continuing to conduct its
telecommunications operations in a given jurisdiction, Customer shall (i) immediately notify MCI WorldCom by facsimile, (ii) send written notice to MCI WorldCom within twenty-four
(24) hours of such prohibition, and (iii) take immediate steps to suspend or discontinue its use of Switched Services in such jurisdiction. 

        12.    Interstate/Intrastate Service.    Except with respect to
Switched Services specifically designated as intrastate Services or international Services, the rates provided to Customer in the applicable Attachments are applicable only to Switched Services if
such Switched Services are used for carrying interstate telecommunications (i.e., Switched Services subject to FCC jurisdiction). MCI WorldCom shall not be obligated to provide Switched Services with
end points within a single state or Switched Services which originate/terminate at points both of which are situated within a single state. In those states where MCI WorldCom is authorized to provide
intrastate service (i.e., telecommunications transmission services subject to the jurisdiction of state regulatory authorities), MCI WorldCom will, at its option, provide intrastate Switched Services
pursuant to applicable state laws, regulations and applicable tariff, if any, filed by MCI WorldCom with state regulatory authorities as required by applicable law. 

        13.    Authorized Use of MCI WorldCom Name; Press Releases.    Without
MCI WorldCom's prior written consent, Customer shall not (i) refer to itself as an authorized representative of MCI WorldCom whenever it refers to the Switched Services in promotional,
advertising or other materials, or (ii) use MCI WorldCom's logos, trade marks, service marks, or any variations thereof in any of its promotional, advertising or other materials. Additionally,
Customer shall provide to MCI WorldCom for its prior review and written approval, all promotions, advertising or other materials or activity using or displaying MCI WorldCom's name or the Services to
be provided by MCI WorldCom. In the event MCI WorldCom fails to provide its approval such promotion, advertising or other materials shall be deemed not approved. Customer agrees to change or correct,
at Customer's expense, any such material or activity which MCI WorldCom, in its sole judgment, determines to be inaccurate, misleading or otherwise objectionable for any reason. Customer is explicitly
authorized to only use the following 

*
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statements in its sales literature or if in response to an inquiry by Customer's End User: (i) "Customer utilizes the MCI WorldCom network", (ii) "Customer utilizes MCI WorldCom's
facilities", (iii) "MCI WorldCom provides only the network facilities", and (iv) "MCI WorldCom is our network services provider". Except as specifically provided in this Section 13, the
parties further agree that any press
release, advertisement or publication generated by a party regarding this Agreement, the Services provided hereunder or in which a party desires to mention the name of the other party or the other
party's parent or affiliated company(ies), will be submitted to the non-publishing party for its written approval prior to publication. 

        14.    Notices.    Notices under this Agreement shall be in writing
and delivered to the person identified below at the offices of the parties as they appear below or as otherwise provided for by proper notice hereunder. Customer shall notify MCI WorldCom in writing
if Customer's billing address is different than the address shown below. The effective date for any notice under this Agreement shall be the date of actual receipt of such notice by the appropriate
party, notwithstanding the date of mailing or transmittal via hand delivery or facsimile. 

	If to MCI WorldCom:	 	MCI WORLDCOM Network Services, Inc.

6929 North Lakewood Avenue

Tulsa, Oklahoma 74117

Attn: Wholesale Services
	
If to Customer:	
 	

Ciera Network Systems, Inc.

2630 Fountainview

Houston, Texas 77057

Attn: Bob Livingston

Telephone No.: 713-914-3850

Fax No.: 713-914-3851

        15.    No-Waiver.    No term or provision of this Agreement shall be
deemed waived and no breach or default shall be deemed excused unless such waiver or consent shall be in writing and signed by the party claimed to have waived or consented. A consent to waiver of or
excuse for a breach or default by either party, whether express or implied, shall not constitute a consent to, waiver of, or excuse for any different or subsequent breach or default. 

        16.    Partial Invalidity; Government Action.    

        (A)    Partial Invalidity    If any part of any provision of this Agreement or any other agreement, document or
writing given pursuant to or in connection with this Agreement shall be invalid or unenforceable under applicable law, rule or regulation, that part shall be ineffective to the extent of such
invalidity only, without in any way affecting the remaining parts of that provision or the remaining provisions of this Agreement. In such event, Customer and MCI WorldCom will negotiate in good faith
with respect to
any such invalid or unenforceable part to the extent necessary to render such part valid and enforceable. 

        (B)    Government Action    Upon thirty (30) days prior notice, either party shall have the right, without liability
to the other, to cancel an affected portion of the Switched Service if any material rate or term contained in this Agreement and relevant to the affected Switched Service is substantially changed (to
the detriment of the terminating party) or found to be unlawful or the relationship between the parties hereunder is found to be unlawful by order of the highest court of competent jurisdiction to
which the matter is appealed, the FCC, or other local, state or federal government authority of competent jurisdiction. Provided, the 30-day notice required hereunder may be shortened as necessary if
such order goes into effect prior to thirty (30) days. 

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        17.    Exclusive Remedies.    Except as otherwise specifically
provided for herein, the remedies set forth in this Agreement comprise the exclusive remedies available to either party at law or in equity. 

        18.    Use of Service    Upon MCI WorldCom's acceptance of a Service
Request hereunder, MCI WorldCom will provide the Switched Services specified therein to Customer upon condition that such Switched Services shall not be used for any unlawful purpose. The provision of
Switched Services is not intended to and will not create a partnership or joint venture between the parties or result in a joint communications service offering to any third parties, and MCI WorldCom
and Customer agree that this Agreement, to the extent it is subject to FCC regulation, is an inter-carrier agreement which is not subject to the filing requirements of Section 211(a) of the
Communications Act of 1934 (47 U.S.C. §211(a)) as implemented in 47 C.F.R. §43.51. 

        19.    Choice of Law; Forum.    

        (A)    Law    This Agreement shall be construed under the laws of the State of Oklahoma without regard to choice of
law principles. 

        (B)    Forum    Any legal action or proceeding with respect to this Agreement may be brought in the Courts of the
State of Oklahoma in and for the County of Tulsa or the United States of America for the Northern District of Oklahoma. By execution of this Agreement, both Customer and MCI WorldCom hereby submit to
such jurisdiction, hereby expressly waiving whatever rights may correspond to either of them by reason of their present or future domicile. In furtherance of the foregoing, Customer and MCI WorldCom
hereby agree to service by U.S. Mail at the notice addresses referenced in Section 14. Such service shall be deemed effective upon the earlier of actual receipt or seven (7) days following the date of
posting. 

        20.    Proprietary Information    

        (A)    Confidential Information    The parties understand and agree that the terms and conditions of this Agreement
(but not the existence thereof), all documents referenced herein (including invoices to Customer for Switched Services provided hereunder), communications between the parties regarding this Agreement
or the Switched Services to be provided hereunder (including price quotes to Customer for any services proposed to be provided or actually provided hereunder), as well as such information relevant to
any other agreement between the parties (collectively "Confidential Information"), are confidential as between Customer and MCI WorldCom. 

        (B)    Limited Disclosure    A party shall not disclose Confidential Information (unless subject to discovery or
disclosure pursuant to legal process), to any other party other than the directors, officers, and employees of a party or a party's agents including their respective attorneys, consultants, brokers,
lenders, insurance carriers or bona fide prospective purchasers who have specifically agreed in writing to nondisclosure of the terms and conditions hereof. Any disclosure hereof required by legal
process shall only be made after providing the non-disclosing party with notice thereof in order to permit the non-disclosing party to seek an appropriate protective order or exemption. Violation by a
party or its agents of the foregoing provisions shall entitle the non-disclosing party, at its option, to obtain injunctive relief without a showing of irreparable harm or injury and without bond. 

        (C)    Survival of Confidentiality    The provisions of this Section 20 will be effective as of the date of this
Agreement and remain in full force and effect for a period which will be the longer of (i) one (1) year following the date of this Agreement, or (ii) one (1) year from the termination or expiration of
all Services hereunder. 

        21.    Successors and Assignment.    This agreement shall be binding
upon and inure to the benefit of the parties hereto and their respective successors or assigns, provided, however, that Customer shall not assign or transfer its rights or obligations under this
Agreement without the prior written consent of 

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MCI WorldCom, which consent shall not be unreasonably withheld or delayed, and further provided that any assignment or transfer without such consent shall be void. 

        22.    General.    

        (A)    Survival of Terms    The terms and provisions contained in this Agreement that by their sense and context are
intended to survive the performance thereof by the parties hereto shall so survive the completion of performance and termination of this Agreement, including, without limitation, provisions for
indemnification and the making of any and all payments due hereunder. 

        (B)    Headings    Descriptive headings in this Agreement are for convenience only and shall not affect the
construction of this Agreement. 

        (C)    Industry Terms    Words having well-known technical or trade meanings shall be so construed, and all listings
of items shall not be taken to be exclusive, but shall include other items, whether similar or dissimilar to those listed, as the context reasonably requires. 

        (D)    Rule of Construction    No rule of construction requiring interpretation against the drafting party hereof
shall apply in the interpretation of this Agreement. 

        23.    Entire Agreement.    This Agreement consists of (i) all the terms and conditions
contained herein, and (ii) all documents incorporated herein specifically by reference. This Agreement constitutes the complete and exclusive statement of the understandings between the parties and
supersedes all prior and contemporaneous proposals and agreements (oral or written) between the parties relating to the Switched Services provided hereunder. No subsequent agreement between the
parties concerning the Switched Services (including further Attachments) shall be effective or binding unless it is made in writing and signed by Customer and MCI WorldCom. 

        IN WITNESS WHEREOF, the parties have executed this Telecommunications Services Agreement (Switched Services) as of the dates set forth
below which Agreement will be effective as described in the PET attached hereto. 

	CIERA NETWORK SYSTEMS, INC.	 	MCI WORLDCOM NETWORK SERVICES, INC.
	

By:	
 	

/s/  R.W. LIVINGSTON      
 (Signature)	
 	

By:	
 	

/s/  PETER M. CASSIDY      
 (Signature)
	

R.W. Livingston
 (Print Name)	
 	

Peter M. Cassidy
 (Print Name)
	

CEO
 (Title)	
 	

VP, Wholesale Services
 (Title)
	

5/8/2000
 (Date)	
 	

5/11/00
 (Date)

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 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

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MCI WORLDCOM NETWORK SERVICES, INC.
  
    PROGRAM ENROLLMENT TERMS
  (Switched Services)    
  

        These Program Enrollment Terms (the "PET") are made by and between
MCI WORLDCOM Network Services, Inc. (successor-in-interest to WorldCom Network Services, Inc.) ("MCI WorldCom") and Ciera Network Systems, Inc.
("Customer") and are a part of their Telecommunications Services Agreement for Switched Services. Capitalized terms not defined herein shall have the
meaning ascribed to them in the TSA, the applicable Attachment(s) or applicable tariffs referenced in such Attachment(s). Neither Customer nor MCI WorldCom shall be obligated with respect to the
Switched Services described in any Attachment, nor any other condition of such Switched Services until Customer has submitted and MCI WorldCom has accepted a Service Request with respect to the
particular Switched Service. 

        1.    SERVICE TERM:    

        (A)  The
Service Term shall commence as of the Effective Date (as described below) and shall continue for a period of forty-four (44) months (the
"Service Term"). Upon expiration of the Service Term, the Switched Services in question will continue to be provided pursuant to the same terms and
conditions as are then in effect (including without limitation, the applicable rates, discounts and commitments, if any), subject to termination by either party upon thirty (30) days prior written
notice to the other party. MCI WorldCom will not be obligated to accept any Service Request under this Agreement if Customer's initial Service Request is (i) not submitted by Customer within
thirty (30) days of the Effective Date of this Agreement, and (ii) not subject to a Requested Service Date within ninety (90) days of the Effective Date. 

        (B)  For
purposes of this Agreement, the appropriate Effective Date as determined under this Subsection (B) will be filled in the area provided above by MCI WorldCom.
If Customer has an existing switched services agreement with MCI WorldCom or its affiliates, the "Effective Date" will be the 1st day of the month
following the later of (i) twenty-one (21) days after this Agreement has been fully executed by both parties, or (ii) Customer has received a satisfactory credit review and approval from
MCI WorldCom's Credit Department pursuant to Subsection 6(A) of the TSA, and all security documentation, if any, required by MCI WorldCom has been properly executed and delivered to MCI
WorldCom (collectively, the "Credit Review"). If Customer does not have an existing switched services agreement with MCI WorldCom or its affiliates, the
"Effective Date" will be the date this Agreement has been fully executed by both parties and the Credit Review has been completed. 

        2.    MONTHLY REVENUE:    For purposes of this Agreement, Customer's
"Monthly Revenue" will be comprised of (i) the aggregation of all of Customer's Switched Services Revenue as such term is described in each of
the applicable Attachments, PLUS (ii) Customer's Data Revenue (as defined herein) from MCI WorldCom. For purposes of this Agreement, Customer's "Data
Revenue" will be comprised of Customer's monthly recurring private line Interexchange Service charges (i.e., both Domestic and International) PLUS Customer's Monthly Port
Charges, Monthly CIR Charges and Monthly NNI Charges, if any, as are specifically described in an agreement for Frame Relay Services between MCI WorldCom and Customer. Customer's Monthly Revenue will
not include any pro rata charges, access charges, ancillary or special feature charges, such as, Authorization codes or CDR Tapes, or any other charges other than those identified by the relevant MCI
WorldCom invoice as charges specifically mentioned in this Section 2. 

        3.    SERVICE INTERCONNECTIONS.    

        (A)  In
order to utilize (i) CLASSIC 2000 CARRIER TERMINATION Service, CLASSIC 2000 CARRIER ORIGINATION Service, TRANSCEND® 2000 CARRIER TERMINATION
Service, TRANSCEND® 2000 CARRIER ORIGINATION Service, ACCESS BASED BILLING CARRIER TERMINATION Service, ACCESS BASED BILLING CARRIER ORIGINATION Service, one or 

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more full time dedicated connections between Customer's network and the MCI WorldCom network at one or more MCI WorldCom designated locations ("MCI WorldCom
POP") must be established ("Carrier Service Interconnection(s)"), (ii) CLASSIC 2000 END USER DEDICATED ACCESS Service (1+
or TOLL FREE), TRANSCEND® 2000 END USER DEDICATED ACCESS Service (1+ or TOLL FREE), or ACCESS BASED BILLING END USER DEDICATED ACCESS Service (1+ or TOLL FREE), one or more full time
dedicated connections between an End User's private branch exchange ("PBX") or other customer premise equipment and the MCI Worldcom network at one or
more MCI WorldCom POP(s) must be established ("Dedicated Service Interconnection(s)"), and (iii) PRISM I TERMINATION Service and ADVANCED TOLL
FREE Service, one or more full time dedicated connections between Customer's network and the MCI WorldCom network at one or more MCI WorldCom POP(s) must be established
("Carrier PLUS Service Interconnection(s)"). Each Carrier Service Interconnection, Carrier PLUS Service Interconnection and Dedicated Service
Interconnection shall be comprised of one or more dedicated access circuits, as the case may be. Carrier Service Interconnection(s), Carrier PLUS Service Interconnections and Dedicated Service
Interconnection(s) are collectively referred to as "Service Interconnections". 

        (B)  The
circuit(s) comprising each Service Interconnection to a MCI WorldCom POP shall be requested by Customer on the appropriate MCI WorldCom Service Request. Each Service
Request will describe (among other things) the MCI WorldCom POP to which a Service Interconnection is to be established, the Requested Service Date therefor, the type and quantity of circuits
comprising the Service
Interconnection and any charges and other information relevant thereto, such as, Customer's originating or terminating switch location, as the case may be. Such additional information may be obtained
from Customer or gathered by MCI WorldCom and recorded in Technical Information Sheets provided by MCI WorldCom. 

        (C)  Once
ordered, and unless otherwise provided for in this Agreement, Service Interconnection(s) or the circuits comprising each Service Interconnection may only be
canceled by Customer upon not less than thirty (30) days prior written notice to MCI WorldCom. 

        (D)  With
respect to a Carrier Service Interconnection or a Carrier PLUS Service Interconnection, Customer shall be solely responsible for establishing and maintaining each
Carrier Service Interconnection or Carrier PLUS Service Interconnection over facilities subject to MCI WorldCom's approval. With respect to Dedicated Service Interconnections, MCI WorldCom will
provision and maintain local access facilities between the End User location (i.e., PBX) and the MCI WorldCom POP, subject to any LEC charges plus other applicable terms and charges set forth in MCI
WorldCom's applicable tariffs (or the applicable tariffs of its affiliates), however, Customer may elect to be responsible for establishing each Dedicated Service Interconnection over facilities
subject to MCI WorldCom's approval. Service Interconnections shall be only comprised of DS-1 facilities unless otherwise provided for in the Service Request and agreed to in writing by MCI WorldCom.
If a Service Interconnection is proposed to be made via a local exchange carrier, MCI WorldCom will have the authority to direct Customer to utilize MCI WorldCom's entrance facilities or local serving
arrangement ("LSA") with the relevant local telephone operating company, and Customer will be subject to a non-discriminatory charge therefor from MCI
WorldCom. The monthly recurring charge relevant to Customer's use of LSA capacity shall be subject to upward adjustment by MCI WorldCom from time to time which adjustment, if any, shall not exceed the
rate that otherwise would be charged for the equivalent switched access capacity between the same points by the relevant local telephone operating company pursuant to its published charges for the
type of service in question. 

        (E)  If
other private line interexchange facilities are necessary to establish a Service Interconnection, and such facilities are requested from MCI WorldCom, such facilities
will be provided on an individual case basis. 

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        (F)  Commencing
with the second full calendar month following Start of Service for each circuit comprising a Service Interconnection (i.e., Carrier Service Interconnections,
Dedicated Service Interconnections and Carrier PLUS Interconnections) and thereafter, Customer will maintain Switched Services measured usage charges per DS-1 (or DS-1 equivalent circuit) of not less
than an average of * per calendar month/billing period ("Minimum Monthly Usage"). In the event Customer fails to obtain the required Minimum Monthly
Usage for the circuits comprising each Service Interconnection, MCI WorldCom will charge and Customer will pay the difference between the total combined number of DS-1s times the Minimum Monthly Usage
* and Customer's total combined Switched Services measured usage charges for the circuit(s) comprising the Service Interconnection in questions ("Minimum Usage
Charge"). MCI WorldCom CLASSIC 2000 CARRIER TERMINATION Service,
CLASSIC 2000 CARRIER ORIGINATION Service and CLASSIC 2000 END USER DEDICATED Service (1+ and TOLL FREE) minutes carried over the same Service Interconnection, TRANSCEND® 2000 TERMINATION
Service, TRANSCEND® 2000 CARRIER ORIGINATION Service and TRANSCEND® 2000 END USER DEDICATED ACCESS Service (1+ and TOLL FREE) minutes carried over the same Service
Interconnection, ACCESS BASED BILLING 2000 CARRIER TERMINATION Service, ACCESS BASED CARRIER ORIGINATION Service and ACCESS BASED BILLING END USER DEDICATED Service (1+ and TOLL FREE) carried over the
same Service Interconnection, or PRISM I TERMINATION Service and ADVANCED TOLL FREE Service minutes carried over the same Service Interconnection, shall be included in determining if Customer has met
the Minimum Monthly Usage requirement described herein. 

        *

        (G)  DS-1
circuits comprising all Service Interconnections will be subject to a nonrecurring * per DS-1 switch port installation charge (provided the maximum charge hereunder
will be * for up to 28 DS-1s ordered at the same time), and DS-3 circuits comprising all Service Interconnections will be subject to a nonrecurring per DS-3 switch port installation charge as
determined on an individual case basis. 

        4.    APPLICATION OF DISCOUNTS:    

        (A)  With
respect to Classic 2000, and ACCESS BASED BILLING products and services, after determining Customer's applicable Discount under the appropriate Attachment(s), the
applicable Discount will only be applied to Customer's Interstate Switched Services Revenue (including Alaska, Hawaii, the United States Virgin Islands, Puerto Rico, Guam and the Northern Marianas
Islands unless otherwise noted in an Attachment and including 1+ and Toll Free usage unless otherwise
noted in an Attachment). With respect to TRANSCEND® 2000 products and services, after determining Customer's applicable Discount under the appropriate Attachment(s), the applicable
Discount will only be applied to Customer's Domestic Transport Charges and Customer's Extended Transport Charges to/from Extended Locations unless otherwise noted in an Attachment. With respect to
PRISM I TERMINATION Service and ADVANCED TOLL FREE Service, after determining Customer's applicable Discount under the appropriate Attachment, the applicable Discount will only be applied to
Customer's Interstate Switched Services Revenue unless otherwise noted in the applicable Attachment. 

        (B)  During
the Service Term, with respect to Classic 2000, TRANSCEND® 2000 and ACCESS BASED BILLING products and services, accumulated credits derived from the
applicable Discounts will be applied in arrears commencing with the first day of the month following the Effective Date, that is, the Discount will be applied to Customer's measured usage charges for
the preceding month (the "Discount Period"). The initial Discount Period shall include any partial calendar month following Start of Service, or such
other time basis as may be mutually determined by the parties. With respect to Classic 2000, TRANSCEND® 2000 and ACCESS BASED BILLING products and services each Discount will result in the
application of a credit obtained during the Discount Period to the MCI WorldCom invoice to Customer relevant to the billed measured Switched Service for the calendar month next following the
completion of each Discount Period, provided Customer has paid undisputed 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

3

 

charges (including any late fees, if applicable) for that month and has not otherwise been subject to a Suspension Notice in accordance with the Agreement. Failure of Customer to comply with the
foregoing provision shall entitle MCI WorldCom to withhold any credit due Customer for the Discount Period in question until such charges (including late fees) have been paid in full. 

        (C)  With
respect to all other products and services (not covered by Subsection (B) above), each Discount, if applicable, will result in the application of a credit obtained
during the Discount Period to the MCI WorldCom invoice to Customer relevant to the billed measured Switched Service for the calendar month immediately following the completion of each Discount Period,
provided Customer has paid undisputed charges (including any late fees, if applicable) for that month and has not otherwise been subject to a Suspension Notice in accordance with the Agreement.
Failure of Customer to comply with the foregoing provision shall entitle MCI WorldCom to withhold any credit due Customer for the Discount Period in question until such charges (including late fees)
have been paid in full. 

        5.    CUSTOMER'S MINIMUM REVENUE COMMITMENT:    Commencing with the
first day of the ninth (9th) billing period following the Effective Date (as determined under Section 1 above) and continuing through the end of the Service Term (including any
extensions thereto) (the "Commitment Period"), Customer agrees to maintain, on a take-or-pay basis, Monthly Revenue (as defined in Section 2 above) of
at least * ("Customer's Minimum Revenue Commitment"). 

        6.    DEFICIENCY CHARGE:    If the event Customer does not maintain
Customer's Minimum Revenue Commitment in any month during the Commitment Period (regardless of whether Customer has commenced using any or all of the Switched Services described herein), then for
those month(s) only, Customer will pay MCI WorldCom, in addition to charges due for Switched Services provided to Customer, the difference between Customer's Minimum Revenue Commitment and Customer's
actual Monthly Revenue (as described in Section 2 above) (the "Deficiency Charge"). The Deficiency Charge will be due at the same time payment is due
for Switched Services provided to Customer for the billing period in which the Deficiency Charge arises, or immediately in an amount equal to Customer's Minimum Revenue Commitment for the unexpired
portion of the Service Term, if MCI WorldCom terminates this Agreement based on Customer's default or if Customer terminates this Agreement pursuant to Section 2(A) of the TSA. It is agreed that MCI
WorldCom's damages in the event Customer fails to maintain Customer's Minimum Revenue Commitment shall be difficult or impossible to ascertain. The provision for a Deficiency Charge in this Section 6
is intended, therefore, to establish liquidated damages in the event Customer fails to maintain Customer's Minimum Revenue Commitment and is not intended as a penalty. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

4

   
        7.    SUSPENSION OF SERVICE.    The parties agree to substitute the
first sentence of Subsection 7(A) of the TSA to read in its entirety as follows: 

        (A)    Suspension of Service    In the event all undisputed charges due pursuant to MCI WorldCom's invoice are not
paid in full by the Due Date or disputed charges owed by Customer, if any, are not paid in full by the Alternate Due Date, MCI WorldCom shall have the right, after giving Customer at least five (5)
days prior written notice and opportunity to pay such charges within such 5-day period, to suspend all or any portion of the Switched Services to Customer ("Suspension
Notice") until such time (designated by MCI WorldCom in its Suspension Notice) as Customer has paid in full all undisputed
charges then due to MCI WorldCom, including any late fees. 

        8.    CDR MEDIA.    The parties agree to substitute the first sentence
of Section IV of the Attachment for CLASSIC 2000 CARRIER ORIGINATION Service, the Attachment for CLASSIC 2000 SWITCHLESS/END USER DEDICATED Services, and the Attachment for CLASSIC 2000 CARRIER
TERMINATION Service, respectively, to read in their entirety as follows: 

MCI
WorldCom will provide Call Detail Records (CDRs) for MCI WorldCom's Switched Services in machine readable form in one of several magnetic tape or optical media formats including but not limited to
CD ROM format (selected by Customer on Customer's Service Request) ("CDR Media"). 

        9.    SPECIAL RATES:    

        (A)  Notwithstanding
anything to the contrary contained in the applicable Attachment(s) attached hereto, commencing as of the Effective Date (described in Section 1 above)
and continuing through the end of the Service Term, with respect to CLASSIC 2000 SWITCHLESS 1+ Service, CLASSIC 2000 SWITCHLESS TOLL FREE Service, CLASSIC 2000 END USER DEDICATED 1+ Service, CLASSIC
2000 END USER DEDICATED TOLL FREE Service, CLASSIC 2000 CARRIER ORIGINATION Service, and CLASSIC 2000 CARRIER TERMINATION Service, Customer will receive the special rates (the  "Special Rates") shown in
Subparts (i) through (xix) below. The Special Rates contained in Subparts ii, iii, iv, v, ix, x, xi, and xii will be subject
to the applicable discount
percentage set forth in the applicable Attachment(s). The Special Rates contained in Subparts i, vi, vii, viii, xiii, xiv, xv,xvi, xvii, xviii, and xix will not be subject to the applicable discount
percentage set forth in the applicable Attachment(s). All other rates will be as set forth in the applicable Attachment(s). 

          (i)  CLASSIC
2000 SWITCHLESS 1+ Service and CLASSIC 2000 SWITCHLESS TOLL FREE Service—Customer's Interstate rate for calls within the 48 contiguous United States
will be *. 

        (ii)  CLASSIC
2000 END USER DEDICATED 1+ Service—Customer's Interstate rate for calls within the 48 contiguous United States will be the respective rates per
minute set forth below: 

*

        (iii)  CLASSIC
2000 END USER DEDICATED TOLL FREE Service—Customer's Interstate rate for calls within the 48 contiguous United States will be the respective rates
per minute set forth below: 

* 

        (iv)  CLASSIC
2000 CARRIER TERMINATION Service—Customer's Interstate rate for calls within the 48 contiguous United States will be the respective rates per minute
set forth below: 

*

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

5

 

        (v)  CLASSIC
2000 CARRIER ORIGINATION Service—Customer's Interstate rate for calls within the 48 contiguous United States will be the respective rates per minute
set forth below: 

*

        (vi)  CLASSIC
2000 SWITCHLESS 1+ Service and CLASSIC 2000 SWITCHLESS TOLL FREE Service—Customer's Intrastate rate for calls within the following states will be
the respective rates per minute set forth below: 

* 

      (vii)  CLASSIC
2000 CARRIER TERMINATION Service and CLASSIC 2000 END USER DEDICATED 1+ Service—Customer's Intrastate rate for calls within the following states
will be the respective rates per minute set forth below: 

*

      (viii)  CLASSIC
2000 CARRIER ORIGINATION Service and CLASSIC 2000 END USER DEDICATED TOLL FREE Service—Customer's Intrastate rate for calls within the following
states will be the respective rates per minute set forth below: 

* 

        (ix)  CLASSIC
2000 CARRIER ORIGINATION Service and CLASSIC 2000 END USER DEDICATED TOLL FREE Service—Customer's Interstate—Extended rate for calls
will be the respective rates per minute set forth below: 

*

        (x)  CLASSIC
2000 CARRIER TERMINATION Service and CLASSIC 2000 END USER DEDICATED 1+ Service—Customer's Interstate—Extended rate for calls will be the
respective rates per minute set forth below: 

* 

        (xi)  CLASSIC
2000 SWITCHLESS TOLL FREE Service—Customer's Interstate—Extended rate for calls will be the respective rates per minute set forth below: 

*

      (xii)  CLASSIC
2000 SWITCHLESS 1+ Service—Customer's Interstate—Extended rate for calls will be the respective rates per minute set forth below: 

* 

      (xiii)  CLASSIC
2000 CARRIER ORIGINATION Service and CLASSIC 2000 END USER DEDICATED TOLL FREE Service—Customer's Canada (All Regions) rate for calls from Canada
to the 48 contiguous United States will be * 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

6

  

      (xiv)  CLASSIC
2000 CARRIER TERMINATION Service and CLASSIC 2000 END USER DEDICATED 1+ Service—Customer's Canada rate for calls from the 48 contiguous United
States to Canada will be the respective rates per minute set forth below: 

* 

Region
1 NPAs—250, 416, 418, 450, 514, 519, 604, 613, 705, 807, 819, 905

Region 2 NPAs—403, 780, 867, 886, 889, 902

Region 3 NPAs—204, 306, 506, 709 

      (xv)  CLASSIC
2000 SWITCHLESS 1+ Service—Customer's Canada rate for calls from the 48 contiguous United States to Canada will be the respective rates per minute
set forth below: 

*

Region
1 NPAs—250, 416, 418, 450, 514, 519, 604, 613, 705, 807, 819, 905

Region 2 NPAs—403, 780, 867, 886, 889, 902

Region 3 NPAs—204, 306, 506, 709 

      (xvi)  CLASSIC
2000 SWITCHLESS TOLL FREE Service—Customer's Canada rate for calls will be the respective rates per minute set forth below: 

*

    (xvii)    CLASSIC
2000 CARRIER TERMINATION Service and CLASSIC 2000 END USER DEDICATED 1+ Service—Customer's Mexico rate for calls from the 48
contiguous United States to Mexico will be the respective rates per minute set forth below: 

* 

    (xviii)    CLASSIC
2000 SWITCHLESS 1+ Service—Customer's Mexico rate for calls will be the respective rates per minute set forth below: 

*

      (xix)    CLASSIC
2000 DIRECTORY ASSISTANCE Service—Customer's Directory Assistance rate for calls will be the respective rates per call set forth
below: 

* 

        (B)  Notwithstanding
anything to the contrary contained in the TSA, MCI WorldCom reserves the right to modify the Special Rates described in Subsection (A) above (which
charge modifications shall not exceed then-current generally available MCI WorldCom charges for comparable services), upon not less than thirty (30) calendar days' prior notice to Customer (facsimile
being acceptable), which notice will state the effective date for the charge modification. 

        10.    RBOC ORIGINATION / TERMINATION.    The parties agree to substitute the per minute surcharge contained in
Subsection I(E) of the Attachment for CLASSIC 2000 CARRIER ORIGINATION Service, Subsection I(E) of the Attachment for CLASSIC 2000 CARRIER TERMINATION Service, Subsection I(F) of the Attachment for
CLASSIC 2000 SWITCHLESS/END USER DEDICATED Services, respectively, will be * 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

7

 

        11.    ATTACHMENTS:    This Agreement consists of the TSA, the PET and the following Attachment(s) [check
all that apply] and will include any additional Attachments agreed to by the parties after the Effective Date of this
Agreement:

	

o	
 	

CLASSIC 2000 CARRIER TERMINATION Service (Schedules CL-A (2000), CL-B(2000), CL-C(2000))	
 	

o	
 	

CLASSIC 2000 CARRIER ORIGINATION Service (Schedules CL-A (2000), CL-B (2000))
	

ý	
 	

CLASSIC 2000 SWITCHLESS/END USER DEDICATED Service (Schedule CL-A (2000), CL-B (2000), CL-C (2000), CL-D (2000))
	

o	
 	

TRANSCEND® 2000 Services (Schedules TR-A(2000)
	

o	
 	

TRANSCEND® UNIVERSAL INTERNATIONAL FREEPHONE NUMBER Service (UFIN)
	

o	
 	

TRANSCEND® INTERNATIONAL TOLL FREE SERVICES (ITFS)
	

o	
 	

PRISM 1® CARRIER TERMINATION Service (Schedules PR-A, PR-B, PR-C and PR-D)	
 	

o	
 	

ADVANCED TOLL FREE Service (Schedules PR-A, PR-B, PR-C and PR-D)
	

o	
 	

ACCESS BASED BILLING CARRIER TERMINATION Service (Schedules ABB-A, ABB-B, ABB-C)
	

o	
 	

ACCESS BASED BILLING CARRIER ORIGINATION Service (Schedules ABB-D, ABB-E)
	

o	
 	

ACCESS BASED BILLING SWITCHLESS/END USER DEDICATED Service (Schedules ABB-A, ABB-B, ABB-C, ABB-D, ABB-E, ABB-F, ABB-G, ABB-H, ABB-I, ABB-J)
	

o	
 	

OPERATOR SERVICES	
 	

o	
 	

DEBIT CARD Service
	

o	
 	

CALLING CARD® Service	
 	

o	
 	

NETWORK CONFERENCING Service
	

o	
 	

UNIVERSAL INTERNATIONAL FREE PHONE NUMBER Service (UIFN)	
 	

ý	
 	

INTERNATIONAL TOLL FREE SERVICES (ITFS)
	

o	
 	

LOCAL SERVICE	
 	

o	
 	

CIC TRANSLATION Service

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

8

 

        IN
WITNESS WHEREOF, the parties have executed these Switched Services Program Enrollment Terms. 

	
MCI WORLDCOM NETWORK SERVICES, INC.	
 	
CIERA NETWORK SYSTEMS, INC.
	

By:	

/s/  PETER M. CASSIDY      
	
 	

By:	

/s/  R.W. LIVINGSTON      

	(Signature)	 	(Signature)
	

Peter M. Cassidy
	
 	

R. W. Livingston

	(Print Name)	 	(Print Name)
	

VP, Wholesale Services
	
 	

CEO

	(Title)	 	(Title)
	

5/11/00
	
 	

5/8/2000

	(Date)	 	(Date)

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

9

  

 
 

WORLDCOM NETWORK SERVICES, INC.    
  

 
  ATTACHMENT FOR CLASSIC 2000 SWITCHLESS/END USER DEDICATED SERVICES    
  

        This Attachment for CLASSIC 2000 SWITCHLESS/END USER DEDICATED Services is made by and between Ciera Network
Systems, Inc. ("Customer") and MCI WorldCom Network Services, Inc. ("MCI WorldCom") and is a part of
their Telecommunications Services Agreement for Switched Services. Capitalized terms not defined herein shall have the meaning ascribed to them in the TSA, the PET or the applicable Attachment(s).  NOTE: ANY MODIFICATIONS,
ADDITIONS OR DELETIONS FROM THIS ATTACHMENT WILL NOT BE EFFECTIVE UNLESS SPECIFICALLY SET FORTH IN THE PET.

        During
the Service Term of the Agreement, MCI WorldCom will provide "CLASSIC 2000 SWITCHLESS/END USER DEDICATED Services" which include
the following services: 

        (a)  CLASSIC
2000 SWITCHLESS 1+ Service which is the origination (via individual telephone lines) and termination of calls solely over facilities comprising the MCI WorldCom
network, (i) to and from the locations below, and (ii) for the charges and applicable discounts set forth herein. 

        (b)  CLASSIC
2000 SWITCHLESS TOLL FREE Service which is the origination (via individual telephone lines) and termination of calls solely over facilities comprising the MCI
WorldCom network, (i) to and from the locations below, and (ii) for the charges and applicable discounts set forth herein. 

        (c)  CLASSIC
2000 END USER DEDICATED 1+ Service which is the termination of calls solely over facilities comprising the MCI WorldCom network which origination is via
dedicated access lines, (i) to and from the locations below, and (ii) for the charges and applicable discounts set forth herein. 

        (d)  CLASSIC
2000 END USER DEDICATED TOLL FREE Service which is the origination of Toll Free calls by MCI WorldCom solely over facilities comprising the MCI WorldCom network
which termination is via dedicated access lines, (i) to and from the locations below, and (ii) for the charges and applicable discounts set forth herein. 

I.    TERMS AND CONDITIONS.  

        (A)    Forecasts:    Before Customer's initial order for CLASSIC 2000
SWITCHLESS/END USER DEDICATED Services, Customer shall provide MCI WorldCom with a forecast regarding the number of minutes expected to be terminated or originated in various LATAs and/or Tandems, so
as to enable MCI WorldCom, to configure optimum network arrangements. In the event Customer's traffic volumes result in a lower than industry standard completion rate or
otherwise adversely affect the MCI WorIdCom Network, MCI WorldCom reserves the right to block the source of such adverse traffic at any time. Customer will provide MCI WorldCom
with additional forecasts from time to time upon MCI WorldCom's request which shall not be more frequent than once every three (3) months. 

        (B)    Start of Service:    Start of Service for (i) CLASSIC 2000
SWITCHLESS 1+ Service will be on an ANI by ANI basis concurrently with the activation of each ANI to be served, (ii) CLASSIC 2000 SWITCHLESS TOLL FREE Service will be on a Toll Free Number by Toll
Free Number basis concurrently with the activation of each Toll Free Number to be served, and (iii) CLASSIC 2000 END USER DEDICATED 1+ Service and CLASSIC 2000 END USER DEDICATED TOLL FREE Service
will be concurrently with the activation of each circuit comprising a Dedicated Service Interconnection (as defined in the PET) relevant to such Service. 

        (C)    Submission of ANIs:    After MCI WorldCom's receipt and
verification of a valid Service Request for CLASSIC 2000 SWITCHLESS 1+ Service or CLASSIC 2000 END USER DEDICATED 1+ Service requiring a change in the primary interexchange carrier
("PIC"), MCI WorldCom agrees to (i) submit the ANI(s) relevant to such Service Requests to the following local exchange carriers 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

1

 

("LECs") (with which MCI WorldCom currently has electronic interface capabilities) within ten (10) days: Ameritech, Bell Atlantic, BellSouth, Nynex,
Pacific Bell, Southwestern Bell, US West, GTE and United, and (ii) submit the ANI(s) relevant to such Service Requests to those LECs with which MCI WorldCom does not have electronic interface
capabilities within a reasonable time. 

        (D)    Limitation of Origination and Termination Locations:    

          (i)  CLASSIC
2000 SWlTCHLESS 1+ Service may be originated from all equal access exchanges in the 48 contiguous United States (except in LATA 921—Fishers Island,
New York) and Hawaii and terminated to any direct dialable location worldwide. 

        (ii)  CLASSIC
2000 SWITCHLESS TOLL FREE Service may be originated from locations in the 48 contiguous United States, Hawaii, Alaska, the US Virgin Islands, Puerto Rico, Guam,
the Northern Marianas Islands, Canada and Mexico and terminated to locations in the 48 contiguous United States and Canada. 

        (iii)  CLASSIC
2000 END USER DEDICATED 1+ Service may be originated from any Customer-designated Dedicated Service Interconnection and terminated to any direct dialable
location worldwide. 

        (iv)  CLASSIC
2000 END USER DEDICATED TOLL FREE Service may be originated from locations in the 48 contiguous United States, Hawaii, Alaska, the US Virgin Islands, Puerto
Rico, Guam, the Northern Marianas Islands, Canada and Mexico and terminated to any Customer-designated Dedicated Service Interconnection in the 48 contiguous United States or Hawaii, 

        (E)    Billing Increments:    All calls (excluding California,
Intra.LATA and California intrastate calls and calls to/from International Locations, Canada and Mexico) will be billed in * increments . and subject to * minimum charge. California IntraLATA and
California intrastate calls will be billed in * increments and subject to an * charge. Calls to/from International Locations, Canada and Mexico will be billed in * and subject to a * minimum charge.
All calls will be billed utilizing Hardware Answer Supervision where available commencing with Customer's switch wink or answer back. If Customer is found to be non-compliant in passing back
appropriate answer supervision, i.e., answer back, MCI WorldCom reserves the right to suspend CLASSIC 2000 SWITCHLESS TOLL FREE Service and/or CLASSIC 2000 END USER DEDICATED TOLL FREE Service or deny
requests by Customer for additional Service until appropriate compliance is established. 

        (F)    RBOC TERMINATION/Origination:    Following Start of Service for
CLASSIC 2000 END USER DEDICATED 1 + and TOLL FREE Service, Customer will maintain at least * of the minutes of traffic (during any calendar month or pro rata portion thereof) for termination or
origination in a Tandem owned and operated by a Regional Bell Operating Company ("RBOC Terminations/Originations") and subject to such RBOC's tariffed
access charges. MCI WorldCom shall have the right to apply a * per minute surcharge to the number of minutes by which Non-RBOC Terminations/Originations exceed * of total monthly minutes for each of
the following Services: CLASSIC 2000 END USER DEDICATED 1+ and TOLL FREE Service. 

        (G)    Presubscribed Interexchange Carrier Charge (PICC):    MCI
WorldCom will charge Customer for any LEC-assessed presubscribed interexchange carrier charge ("PICC Charge") which PICC Charge will be reasonably
determined by MCI WorldCom as of a date certain each month (the "PICC Charge Determination Date"). Customer's PICC Charge will be determined as of the
PICC Charge Determination Date and will be based on the same criteria for which MCI WorldCom is assessed such charge by the LEC (e.g., number and type of Customer's End Users (i.e., residential or
business) as well as the type of line associated with each such End User (i.e., single line, secondary line or multi-line). This Subparagraph (G) will be deemed to include any other similar additional
charges assessed by a LEC during the Service Term of this Agreement (i.e., charges for which MCI WorldCom is not currently being assessed). 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

   
        (H)    Toll Free Numbers:    

        (1)  TOLL
FREE numbers will be issued to Customer (i.e., issuance equates to activation or reservation, whichever occurs first) on a random basis. Customer requests for
specific numbers will be considered by MCI WorldCom, and if provided, will be subject to additional charges as set forth below and MCI WorldCom's then current reservation policy which shall also apply
to any randomly selected and reserved TOLL FREE number. At any time preceding three (3) months from the scheduled expiration of the Service Term, Customer may only reserve TOLL FREE numbers in an
amount equal to the greater of (i) * or (ii) * of the total number of TOLL FREE numbers activated by MCI WorldCom for Customer. Customer requests for TOLL FREE numbers inconsistent with the above
stated conditions may be considered by MCI WorldCom on individual case basis. TOLL FREE numbers reserved for Customer will be activated upon Customer's request. 

        (2)  Customer
Request for Specific Numbers—* per individual TOLL FREE number reserved or assigned. 

        (3)  Customer
specifically agrees that regardless of the method in which a TOLL FREE number is reserved for or otherwise assigned to Customer, that Customer will not seek any
remedy from MCI WorldCom including, but not limited to, any remedy based on a theory of detrimental reliance or otherwise that such TOLL FREE number(s) are found not to be available for Customer's use
until such TOLL FREE number is put in service for the benefit of Customer, and that such TOLL FREE number(s) shall not be sold, bartered, brokered or otherwise released by Customer for a fee
("TOLL FREE Number Trafficking"). Any attempt by Customer to engage in TOLL FREE Number Trafficking shall be grounds for reclamation by MCI WorldCom for
reassignment of the TOLL FREE number(s) reserved for or assigned to Customer. 

        (I)    Enhanced Toll Free Services and Routing Options:    The
following Toll Free identification services and routing options (collectively, "Enhanced Toll Free Services") are available from MCI WorldCom: 

         IDENTIFICATION SERVICES:    

        i.      Dialed
Number Identification Service (DNIS)—identification of specific TOLL FREE number dialed. 

        ii.    Real-Time
ANI—receipt of telephone number of calling party. 

         TOLL FREE ROUTING OPTIONS:    

        i.      Message
Referral—recording (up to six (6) months) that informs callers that the TOLL FREE number has been disconnected or refers callers to new number. 

        ii.    Call
Area Selection—selection or blockage of locations from which TOLL FREE numbers can be received (i.e., State, NPA, LATA or NXX level). 

        iii.    Call
Distributor Routing [END USER DEDICATED TOLL FREE Service only]—distribution of TOLL FREE traffic evenly over dedicated access
lines in a trunk group (e.g., ascending, descending, most idle, least idle). 

        iv.    Route
Completion (Overflow) [END USER DEDICATED TOLL FREE Service only]—overflow of TOLL FREE dedicated access traffic only to up to
five (5) pre-defined alternate routing groups (e.g., dedicated access, WATs access lines or switched access lines). 

        v.    Geographic
Routing—termination of calls to a single TOLL FREE number from two or more originating routing groups to different locations. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

3

 

        vi.    Time-of-Day
Routing—routing of calls to single TOLL FREE number based on time of day (up to forty-eight (48) time slots of 15-minute increments in a 24-hour
period). 

        vii.  Day-of-Week
Routing—routing of calls to single TOLL FREE number based on each day of the week. 

        viii.  Day-of-Year
Routing—routing of calls to single TOLL FREE number based on up to fifteen (15) customer-specified holidays. 

        ix.    Percent
Allocation Routing—routing of calls for each originating routing group to two (2) or more terminating locations based on customer-specified
percentage. 

Customer
will receive the Identification Services described above at no charge. The minutes of use rates for Toll Free Routing Options described above (in addition to the Toll Free Routing Option
Feature Charges described below) will be the same rates for CLASSIC 2000 SWITCHLESS TOLL FREE Service or CLASSIC 2000 END USER DEDICATED TOLL FREE Service described herein excluding Route Completion
(Overflow). The Toll Free Routing Option Feature Charges are as follows: 

        Installation Charge:    * per feature; maximum of * per TOLL FREE number.    

        Change Order Charge:    * per feature; maximum of * per TOLL FREE number.    

        Monthly Recurring Charge:    * per feature; maximum of * per TOLL FREE number.    

        Expedite Charge:    * (i.e., outside normal interval time of four (4) business days).    

Note:
More than ten (10) points of termination for a single feature will be treated as two (2) features. Further, every additional ten (10) points of termination will be treated as a separate feature. 

        (J)    RespOrg Services:    Responsible Organization Services
(relevant to TOLL FREE Numbers) if provided by MCI WorldCom will be provided by MCI WorldCom pursuant to MCI WorldCom's applicable tariffs (or the applicable tariffs of its affiliates). 

        (K)    Payphone Surcharge:    In the event MCI WorldCom is required to
compensate payphone service providers (PSPs) for toll-free or access code calls which originate from payphones (including without limitation, any Order adopted by the FCC)
("Payphone Surcharge"), MCI WorldCom will charge and Customer agrees to pay MCI WorldCom the amount of the Payphone Surcharge which is required to be
paid by MCI WorldCom. 

II.    CLASSIC 2000 SWITCHLESS/END USER DEDICATED SERVICE CHARGES.  

        (A)  For purposes of this Attachment, Customer's "Switched Services Revenue"
will be comprised of (i) Customer's gross (i.e., prior to the application of discounts) measured and per call Switched Service charges described in Subsections (B) through (F) below (i.e., Directory
Assistance and both domestic and international), and (ii) the PICC Charge, if applicable, described in Subsection I.(G) above. 

        (B)  CLASSIC 2000 SWITCHLESS 1+ Service 

        (i)    INTERSTATE

*

        (ii)  INTERSTATE—Extended

* 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

4

 

        (iii)  INTRASTATE
(NOT SUBJECT TO DISCOUNT) 

* 

        (iv)  CANADA
(NOT SUBJECT TO DISCOUNT). 

*

Region
1 NPAs—250, 416, 418, 450, 514, 519, 604, 613, 705, 807, 819, 905

Region 2 NPAs—403, 780, 867, 886, 889, 902

Region 3 NPAs—204, 306, 506, 709 

        (v)  MEXICO
(NOT SUBJECT TO DISCOUNT). 

* 

        (vi)  INTERNATIONAL
(NOT SUBJECT TO DISCOUNT). 

*

        (C)  CLASSIC 2000 SWITCHLESS TOLL FREE Service 

        (i)    INTERSTATE 

* 

        (ii)  INTERSTATE—Extended

*

        (iii)  INTRASTATE
(NOT SUBJECT TO DISCOUNT). 

SEE
SUBSECTION II.(B)(3) ABOVE. 

        (iv)  CANADA
(NOT SUBJECT TO DISCOUNT). 

*

        (D)  CLASSIC 2000 END USER DEDICATED 1+ Service 

        (i)    INTERSTATE 

* 

        (ii)  INTERSTATE—Extended 

*

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

5

   
        (iii)    INTRASTATE (NOT SUBJECT TO DISCOUNT). 

*

        (iv)    CANADA
(NOT SUBJECT TO DISCOUNT). 

* 

Region
1 NPAs - 250, 416, 418, 450, 514, 519, 604, 613, 705, 807, 819, 905

Region 2 NPAs - 403, 780, 867, 886, 889, 902

Region 3 NPAs - 204, 306, 506, 709 

        (v)    MEXICO
(NOT SUBJECT TO DISCOUNT). 

*

        (vi)    INTERNATIONAL
(NOT SUBJECT TO DISCOUNT). 

* 

(E)  CLASSIC 2000 END USER DEDICATED TOLL FREE Service 

        (i)    INTERSTATE

*

        (ii)    INTERSTATE—Extended

*

        (iii)    INTRASTATE
(NOT SUBJECT TO DISCOUNT). 

* 

        (iv)    CANADA
(NOT SUBJECT TO DISCOUNT). 

* 

(F)  CLASSIC 2000 DIRECTORY ASSISTANCE (NOT SUBJECT TO DISCOUNT). 

*

III.  DISCOUNTS.  

        Commencing with the Effective Date and continuing through the end of the Service Term (including any applicable
extensions thereto), Customer's discount percentage for CLASSIC 2000 SWITCHLESS/END USER DEDICATED Services (the "Discount") will be determined under
the Discount Schedule shown below based * 

	*	 	*

IV.  CDR MEDIA.  

        MCI WorldCom will provide Call Detail Records (CDRs) for MCI WorldCom's Switched Services in machine readable form in one of several magnetic tape formats
(selected by Customer on Customer's Service Request) ("CDR Media"). CDR Media provided hereunder (i) monthly is provided at no charge, (ii) weekly is
subject to a recurring monthly charge of *, and (iii) daily is subject to the applicable non-recurring Installation Charge as described below (plus all leased-line and equipment costs necessary to
implement Daily CDR Media which will be determined on an individual case basis depending on Customer's specific configuration). 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

6

 

*

*

        IN
WITNESS WHEREOF, authorized parties on behalf of their respective entities have initialed this Attachment for CLASSIC 2000 SWITCHLESS/END USER DEDICATED Services as of the date shown
below. 

	CIERA NETWORK SYSTEMS, INC.	 	MCI WORLDCOM NETWORK

SERVICES, INC.
	

Customer's Initials	
 	

[illegible]
	
 	

MCI WorldCom's Initials	
 	

[illegible]

	

Date:	
 	

5/8/2000
	
 	

Date:	
 	

5/11/00

ATTACHMENTS:

Schedule
CL-A (Millennium) = SUPERSAVER LATAs

Schedule CL-B (Millennium) = PREMIUM LATAs

Schedule CL-C (Millennium) = International Rates 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

7

  

 
 

WORLDCOM NETWORK SERVICES, INC.    
  

        ATTACHMENT FOR CLASSIC 2000 CARRIER TERMINATION SERVICE  

        This Attachment for CLASSIC 2000 CARRIER TERMINATION Service is made by and between Ciera Network Systems, Inc.
("Customer") and WorldCom Network Services, Inc. ("MCI WorldCom") and is a part of their
Telecommunications Services Agreement for Switched Services. Capitalized terms not defined herein shall have the meaning ascribed to them in the TSA, the PET or the applicable Attachment(s).  NOTE: ANY MODIFICATIONS, ADDITIONS
OR DELETIONS FROM THIS ATTACHMENT WILL NOT BE EFFECTIVE UNLESS SPECIFICALLY SET FORTH IN THE PET.

        During
the Service Term of the Agreement, MCI WorldCom will provide "CLASSIC 2000 CARRIER TERMINATION Service" which is MCI WorldCom's
termination of calls received from Customer's Service Interconnection(s) (as defined in the PET), (i) to and from the locations below, and (ii) for the charges and applicable discounts set forth
herein. 

I.    TERMS AND CONDITIONS.  

        (A)    Forecasts:    Before Customer's initial order for CLASSIC 2000
CARRIER TERMINATION Services, Customer shall provide MCI WorldCom with a forecast regarding the number of minutes expected to be terminated in various LATAs and/or Tandems, so as to enable MCI
WorldCom to configure optimum network arrangements. In the event Customer's traffic volumes result in a lower than industry standard completion rate or otherwise adversely
affect the MCI WorldCom Network, MCI WorldCom reserves the right to block the source of such adverse traffic at any time. Customer will
provide MCI WorldCom with additional forecasts from time to time upon MCI WorldCom's request which shall not be more frequent than once every three (3) months. 

        (B)    Start of Service:    Start of Service for CLASSIC 2000 CARRIER
TERMINATION Service will be concurrent with the activation of each circuit comprising a Carrier Service Interconnection (as defined in the PET) relevant to CLASSIC 2000 CARRIER TERMINATION Service. 

        (C)    Limitation of Origination and Termination Locations:    CLASSIC
2000 CARRIER TERMINATION Service may be originated from any MCI WorldCom POP and terminated to any direct dialable location worldwide. 

        (D)    Billing Increments:    All calls (excluding California
IntraLATA and California intrastate calls and calls to International Locations, Canada and Mexico) will be billed in six (6) second increments and subject to a * minimum charge. California IntraLATA
and California intrastate calls will be billed in * increments and subject to an * minimum charge. Calls to International Locations, Canada and Mexico will be billed in * increments and subject to a *
minimum charge. All calls will be billed utilizing Hardware Answer Supervision where available. 

        (E)    RBOC Termination:    Following Start of Service for CLASSIC
2000 CARRIER TERMINATION Service, Customer will maintain at least * of the minutes of CLASSIC 2000 CARRIER TERMINATION Service traffic (during any calendar month or pro rata portion thereof) for
termination in a Tandem owned and operated by a Regional Bell Operating Company ("RBOC Terminations") and subject to such RBOC's tariffed access
charges. MCI WorldCom shall have the right to apply a * per minute surcharge to the number of minutes by which Non-RBOC Terminations exceed * of total monthly minutes for Customer's CLASSIC 2000
CARRIER TERMINATION Service. 

        (F)    PIU CERTIFICATION:    With respect to a Carrier Service
Interconnection as defined in the PET, absent the automatic number identification ("ANI") of the calling party, Customer shall provide MCI WorldCom with
a written certification (the "Certification") of the percentage of interstate (including international) and interstate minutes of use relevant to the
minutes of traffic to be terminated in the same state in which the MCI WorldCom POP is located to which the Carrier Service 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

1

 

Interconnection is made. This Certification shall be provided by Customer prior to Start of Service for any Carrier Service Interconnection and may be modified from time to time by Customer and
subject to recertification upon the request of MCI WorldCom which requests shall not be made unilaterally by MCI WorldCom more than once each calendar quarter. Any such modification(s) or
Certification(s) shall be effective as of the first day of any calendar month and following at least forty-five (45) days notice from Customer. In the event Customer fails to make such Certification,
the relevant minutes of use will be deemed to be subject to the Intrastate Rates described herein. In the event MCI WorldCom or any other third party requires an audit of MCI WorldCom's
interstate/intrastate minutes of traffic, Customer agrees to cooperate in such audit at its expense and make its call detail records, billing systems and other necessary information reasonably
available to MCI WorldCom or any third party
solely for the purpose of verifying Customer's interstate/intrastate minutes of traffic. Customer agrees to indemnify MCI WorldCom for any liability MCI WorldCom incurs in the event Customer's
Certification is different than that determined by the audit. 

II.    CLASSIC 2000 CARRIER TERMINATION SERVICE CHARGES.  

        (A)  For purposes of this Attachment, Customer's "Switched Services Revenue"
will be comprised of Customer's gross (i.e., prior to the application of discounts) measured and per call Switched Service charges described below (i.e., both domestic and international). 

        (B)  Rates Per Minute. 

        (i)    INTERSTATE

        *

        (ii)  INTERSTATE—Extended

        * 

        (iii)  INTRASTATE
(NOT SUBJECT TO DISCOUNT). 

        *

        (iv)  CANADA
(NOT SUBJECT TO DISCOUNT). 

        *

Region
1 NPAs—250, 416, 418, 450, 514, 519, 604, 613, 705, 807, 819, 905

Region 2 NPAs—403, 780, 867, 886, 889, 902

Region 3 NPAs—204, 306, 506, 709 

        (v)  MEXICO
(NOT SUBJECT TO DISCOUNT). 

        *

        (vi)  INTERNATIONAL
(NOT SUBJECT TO DISCOUNT). 

        * 

        (vii) DIRECTORY
ASSISTANCE (NOT SUBJECT TO DISCOUNT). 

        * 

III.  DISCOUNTS.  

        Commencing
with the Effective Date and continuing through the end of the Service Term (including any applicable extensions thereto),
Customer's discount percentage for CLASSIC 2000 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

 

TERMINATION Service (the "Discount") will be determined under the Discount Schedule shown below *. 

        *                                
        * 

IV.  CDR MEDIA.  

        MCI
WorldCom will provide Call Detail Records (CDRs) for MCI WorldCom's Switched Services in machine readable form in one of several magnetic tape formats (selected by Customer on
Customer's Service Request) ("CDR Media"). CDR Media provided hereunder (i) monthly is provided at no charge, (ii) weekly is subject to a recurring
monthly charge of *, and (iii) daily is subject to the applicable nonrecurring Installation Charge as described below (plus all leased-line and equipment costs necessary to implement Daily CDR Media
which will be determined on an individual case basis depending on Customer's specific configuration). 

        *

        IN
WITNESS WHEREOF, authorized parties on behalf of their respective entities have initialed this Attachment for CLASSIC 2000 CARRIER TERMINATION Service as of the date shown below. 

	

Ciera Network Systems, Inc.	
 	
WORLD NETWORK SERVICES, INC.
	

Customer's Initials	
 	

[ILLEGIBLE]
	
 	

MCI WorldCom's Initials	
 	

P.MC

	Date:	 	5/8/2000
	 	Date:	 	5/11/00

ATTACHMENTS: 

Schedule
CL-A (Millennium) = SUPERSAVER LATAs

Schedule CL-B (Millennium) = PREMIUM LATAs

Schedule CL-C (Millennium) = International Rates 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

3

 
 
 

Schedule CL-A
  Classic Millennium SuperSaver LATA's    
  

        * 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

4

 
 
 

Schedule CL-B
  Classic Millenium Premium LATA's    
  

        * 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

5

 
 
 

Schedule CL-C
  Classic Millennium International Rates    
  

        * 6 pages 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

6

  

 
 
 
MCI WORLDCOM NETWORK SERVICES, INC.

CLASSIC o SWITCHED SERVICES
  ATTACHMENT FOR INTERNATIONAL TOLL FREE SERVICES ("ITFS")  

        This Attachment for International Toll Free Services (the "ITFS
Attachment") is made by and between MCI WorldCom Network Services, Inc. ("MCI WorldCom") and Ciera Network Systems, Inc.
("Customer") and is a part of their Telecommunications Services Agreement for Switched Services. Capitalized terms not defined herein shall have the
meaning ascribed to them in the TSA, the Service Schedule or the applicable Rate and Discount Schedule. 

	1.
	ITFS SERVICES:

(A)    During the ITFS Term (as described in Section 2 below) WorldCom will provide (i) dedicated access international toll free
service ("DEDICATED ITFS") which is the (x) international origination of calls by WorldCom and the termination of such calls to Customer's
designated and WorldCom approved Service Interconnection(s) in the domestic United States (i.e., 48 contiguous) or (y) international origination of calls by WorldCom and the termination of such
calls to an End User's domestic United States private branch exchange ("PBX") or other customer premise equipment located in the domestic United States,
or (ii) switched access international toll free service ("SWITCHED ITFS") which is the international origination of calls by WorldCom and the
termination of such calls to the domestic United States solely over facilities comprising the WorldCom network. 

(B)    Subject to the provisions of this ITFS Attachment, all terms and conditions set forth in the TSA, PET and Service Schedule will apply,
to the extent applicable, to DEDICATED ITFS and SWITCHED ITFS provided hereunder. Further, in order to utilize DEDICATED ACCESS ITFS, one or more full
time dedicated connections between (i) Customer's network in the domestic United States or and the WorldCom network at one or more WorldCom designated locations
("WORLDCOM POP") or (ii) an End User's PBX or other customer premise equipment and the WorldCom network at a WorldCom POP must be established
("ITFS Interconnection(s)"). Each ITFS Interconnection shall be comprised of one or more DS-1 circuits. All provisions of the Service Schedule relating
to or referencing "Carrier Service Interconnections" or "Service Interconnections" shall be deemed to include ITFS Interconnections. 

	2.
	ITFS TERM: The "ITFS Term" will commence as
of                        (the  "Effective Date") and will be coterminous with the
Service Term described in the PET. At the end of the ITFS Term, the terms and conditions contained in
this ITFS Attachment will remain in full force and effect until the earlier of (i) cancellation by either party upon at least thirty (30) days' prior written notice to the other party, or
(ii) the cancellation or scheduled termination of the TSA.

	3.
	ITFS RATES: Commencing with the Effective Date and continuing through the end of the ITFS Term, Customer's ITFS rates for DEDICATED ITFS
and SWITCHED ITFS will be the level of applicable charges shown on Schedule 1 attached hereto and incorporated herein by reference based on Customer's Commitment described in the PET (rounded
down to the nearest ITFS Level). In the event Customer's Commitment is less than *, Customer's applicable ITFS rates will correspond with the applicable level of "Base ITFS Rates" shown on
Schedule 1.

	4.
	ACCESSIBILITY/AVAILABILITY: WorldCom will reasonably notify Customer of the various international dialing patterns (the  "Dialing
Pattern") used by those countries in which ITFS is provided by WorldCom. ITFS will be provided by WorldCom subject to availability as
determined solely by WorldCom. Upon WorldCom's receipt of a Service Order Request from Customer, WorldCom will obtain for Customer, at no cost to Customer, a toll free number (the  "ITFS Number") from
the applicable PTT on a random basis (i.e., no specific number requests will be 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

1

 

accepted
by WorldCom) for use by Customer in connection with the Dialing Pattern. The ITFS Number will be translated to a WorldCom designated 800 billing identification number. WorldCom reserves the
right upon not less than ten (10) days' prior notice to terminate ITFS relative to any ITFS Number which does not generate at least sixty (60) minutes of traffic during any consecutive six (6) months.
In the event a number is disconnected as provided in this Section 5, Customer agrees to pay * per ITFS Number which is disconnected. 

	5.
	START OF SERVICE: Start of Service for (i) DEDICATED ACCESS ITFS will occur concurrently with the activation of each circuit
comprising Service Interconnections relevant to DEDICATED ACCESS ITFS, and (ii) SWITCHED ITFS will occur on an ITFS Number by ITFS Number basis concurrently with the activation of each ITFS
Number.

	6.
	LIMITATION OF ORIGINATION OR TERMINATION LOCATIONS:  

(a)    DEDICATED
ACCESS ITFS: (i) origination is available from those countries shown on Schedule 1 as such Schedule may be amended or modified from time to time by WorldCom,
and (ii) termination is available to any Customer designated ITFS Interconnection in the 48 contiguous United States unless such traffic originates in a country where re-origination of ITFS is
specifically allowed by the applicable PTT; provided, if re-origination occurs (or ITFS is used in any way contrary to applicable PTT rules and regulations, Customer specifically acknowledges that
such traffic is subject to interruption). 

(b)    SWITCHED
ITFS: (i) origination is available from those countries shown on Schedule 1 as such Schedule may be amended from time to time by WorldCom, and
(ii) termination is available to locations in the 48 contiguous United States unless such traffic originates in a country where re-origination of ITFS is specifically allowed by the applicable
PTT; provided, if re-origination occurs (or ITFS is used in any way contrary to applicable PTT rules and regulations, Customer specifically acknowledges that such traffic is subject to interruption). 

        IN WITNESS WHEREOF, the parties have executed these Classic/TRANSCEND® Switched Services Attachment for International Toll
Free Service. 

	CIERA NETWORK SYSTEMS, INC.	 	MCI WORLDCOM NETWORK SERVICES, INC.
	

By:	
 	

/s/  R.W. LIVINGSTON      
 (Signature)	
 	

By:	
 	

/s/  PETER M. CASSIDY      
 (Signature)
	

R.W. Livingston
 (Print Name)	
 	

Peter M. Cassidy
 (Print Name)
	

                                      CEO   
                     5/8/2000
 (Title)	
 	

                        VP, Wholesale
Services            5/11/00
 (Title)

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

 
Schedule 1—ITFS (Classic)  

 
 

Schedule 1
  Classic Millennium ITFS Rates    
  

        *

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

3

 
Schedule 1—ITFS (Classic)  

 
 

Schedule 1
  Classic Millennium ITFS Rates    
  

        * 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

4

  

 
 

WORLDCOM NETWORK SERVICES, INC.
  
    ATTACHMENT FOR CLASSIC 2000 CARRIER ORIGINATION SERVICE    
  

        This
Attachment for CLASSIC 2000 CARRIER ORIGINATION Service is made by and between Ciera Network Systems, Inc.
("Customer") and WorldCom Network Services, Inc. ("MCI WorldCom") and is a part of their
Telecommunications Services Agreement for Switched Services. Capitalized terms not defined herein shall have the meaning ascribed to them in the TSA, the PET or the applicable Attachment(s).  NOTE: ANY MODIFICATIONS, ADDITIONS
OR DELETIONS FROM THIS ATTACHMENT WILL NOT BE EFFECTIVE UNLESS SPECIFICALLY SET FORTH IN THE PET.
 

        During
the Service Term of the Agreement, MCI WorldCom will provide "CLASSIC 2000 CARRIER ORIGINATION Service" which is MCI WorldCom's
origination of Toll Free calls by MCI WorldCom and the termination of such calls to Customer's Service Interconnection(s), (i) to and from the locations below, and (ii) for the charges and applicable
discounts set forth herein. 

I.    TERMS AND CONDITIONS.  

        (A)    Forecasts:    Before Customer's initial order for CLASSIC 2000
CARRIER ORIGINATION Services, Customer shall provide MCI WorldCom with a forecast regarding the number of minutes expected to be originated in various LATAs and/or Tandems, so as to enable MCI
WorldCom to configure optimum network arrangements. In the event Customer's traffic volumes result in a lower than industry standard completion rate or otherwise adversely
affect the MCI WorldCom Network, MCI WorldCom
reserves the right to block the source of such adverse traffic at any time. Customer will provide MCI WorldCom with additional forecasts from time to time upon MCI WorldCom's
request which shall not be more frequent than once every three (3) months. 

        (B)    Start of Service:    Start of Service for CLASSIC 2000 CARRIER
ORIGINATION Service will be concurrent with the activation of each circuit comprising a Carrier Service Interconnection (as defined in the PET) relevant to CLASSIC 2000 CARRIER ORIGINATION Service. 

        (C)    Limitation of Origination and Termination Locations:    CLASSIC
2000 CARRIER ORIGINATION Service may be originated from locations in the 48 contiguous United States, Hawaii, Alaska, the US Virgin Islands, Puerto Rico, Guam, the Northern Marianas Islands and Canada
and terminated to any Customer-designated Carrier Service Interconnection in the 48 contiguous United States. 

        (D)    Billing Increments:    All Calls (excluding California
intraLATA and California intrastate calls and calls to/from Canada) will be billed in * increments and subject to a * minimum charge. California IntraLATA and California intrastate calls will be
billed in * increments and subject to an * minimum charge. California intraLATA and California intrastate calls will be billed in * increments and subject to an * minimum charge, and (ii) calls
to/from Canada will be billed in * increments and subject to a * minimum charge. All calls will be billed utilizing Hardware Answer Supervision where available commencing with Customer's switch wink
or answer back. If Customer is found to be non-compliant in passing back appropriate answer supervision, i.e., answer back, MCI WorldCom reserves the right to suspend CLASSIC 2000 CARRIER ORIGINATION
Service or deny requests by Customer for additional Service until appropriate compliance is established. 

        (E)    RBOC Origination:    Following Start of Service for CLASSIC
2000 CARRIER ORIGINATION Service, Customer will maintain at least * of the minutes of CLASSIC 2000 CARRIER ORIGINATION Service traffic (during any calendar month or pro rata portion thereof) for
origination in a Tandem owned and operated by a Regional Bell Operating Company ("RBOC Originations") and subject to such RBOC's tariffed access
charges. MCI WorldCom shall have the 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

1

 

right to apply a * per minute surcharge to the number of minutes by which Non-RBOC Originations exceed * of total monthly minutes for Customer's CLASSIC 2000 CARRIER ORIGINATION Service. 

        (F)    PIU CERTIFICATION:    With respect to a Carrier Service
Interconnection as defined in the PET, absent the automatic number identification ("ANI") of the calling party, Customer shall provide MCI WorldCom with
a written certification (the "Certification") of the percentage of interstate (including international) and intrastate minutes of use relevant to the
minutes of traffic to be terminated in the same state in which the MCI WorldCom POP is located to which the Carrier Service Interconnection is made. This Certification shall be provided by Customer
prior to Start of Service for any Carrier Service Interconnection and may be modified from time to time by Customer and subject to recertification upon the request of MCI WorldCom which requests shall
not be made unilaterally by MCI WorldCom more than once each calendar quarter. Any such modification(s) or Certification(s) shall be effective as
of the first day of any calendar month and following at least forty-five (45) days notice from Customer. In the event Customer fails to make such Certification, the relevant minutes of use will be
deemed to be subject to the Intrastate Rates described herein. In the event MCI WorldCom or any other third party requires an audit of MCI WorldCom's interstate/intrastate minutes of traffic, Customer
agrees to cooperate in such audit at its expense and make its call detail records, billing systems and other necessary information reasonably available to MCI WorldCom or any third party solely for
the purpose of verifying Customer's interstate/intrastate minutes of traffic. Customer agrees to indemnify MCI WorldCom for any liability MCI WorldCom incurs in the event Customer's Certification is
different than that determined by the audit. 

        (G)    Payphone Surcharge:    In the event MCI WorldCom is required to
compensate payphone service providers (PSPs) for toll-free or access code calls which originate from payphones (including without limitation, any Order adopted by the FCC)
("Payphone Surcharge"), MCI WorldCom will charge and Customer agrees to pay MCI WorldCom the amount of the Payphone Surcharge which is required to be
paid by MCI WorldCom. 

        (H)    Toll Free Numbers:    

        (1)  TOLL
FREE numbers will be issued to Customer (i.e., issuance equates to activation or reservation, whichever occurs first) on a random basis. Customer requests for
specific numbers will be considered by MCI WorldCom, and if provided, will be subject to additional charges as set forth below and MCI WorldCom's then current reservation policy which shall also apply
to any randomly selected and reserved TOLL FREE number. At any time preceding three (3) months from the scheduled expiration of the Service Term, Customer may only reserve TOLL FREE numbers in an
amount equal to the greater of (i) * (ii) * of the total number of TOLL FREE numbers activated by MCI WorldCom for Customer. Customer requests for TOLL FREE numbers inconsistent with the above stated
conditions may be considered by MCI WorldCom on an individual case basis. TOLL FREE numbers reserved for Customer will be activated upon Customer's request. 

        (2)  Customer
Request for Specific Numbers - * per individual TOLL FREE number reserved or assigned. 

        (3)  Customer
specifically agrees that regardless of the method in which a TOLL FREE number is reserved for or otherwise assigned to Customer, that Customer will not seek any
remedy from MCI WorldCom including, but not limited to, any remedy based on a theory of detrimental reliance or otherwise that such TOLL FREE number(s) are found not to be available for Customer's use
until such TOLL FREE number is put in service for the benefit of Customer, and that such TOLL FREE number(s) shall not be sold, bartered, brokered or otherwise released by Customer for a fee
("TOLL FREE Number Trafficking"). Any attempt by Customer to engage in TOLL FREE Number Trafficking shall be grounds for reclamation by MCI WorldCom for
reassignment of the TOLL FREE number(s) reserved for or assigned to Customer. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

   
        (I)    Enhanced Toll Free Services and Routing Options:    The
following Toll Free identification services and routing options (collectively, "Enhanced Toll Free Services") are available from MCI WorldCom: 

IDENTIFICATION SERVICES:

        i.      Dialed
Number Identification Service (DNIS)—identification of specific TOLL FREE number dialed. 

        ii.    Real-Time
ANI—receipt of telephone number of calling party. 

TOLL FREE ROUTING OPTIONS:

        i.      Message
Referral—recording (up to six (6) months) that informs callers that the TOLL FREE number has been disconnected or refers callers to new number. 

        ii.    Call
Area Selection—selection or blockage of locations from which TOLL FREE numbers can be received (i.e., State, NPA, LATA, or NXX level). 

        iii.    Call
Distributor Routing—distribution of TOLL FREE traffic evenly over dedicated access lines in a trunk group (e.g., ascending, descending, most idle,
least idle). 

        iv.    Route
Completion (Overflow)—overflow of TOLL FREE dedicated access traffic only to up to five (5) pre-defined alternate routing groups (e.g., dedicated
access, WATs access lines or switched access lines). 

        v.    Geographic
Routing—termination of calls to a single TOLL FREE number from two or more originating routing groups to different locations. 

        vi.    Time-of-Day
Routing—routing of calls to single TOLL FREE number based on time of day (up to forty-eight (48) time slots of 15-minute increments in a 24-hour
period). 

        vii.  Day-of-Week
Routing—routing of calls to single TOLL FREE number based on each day of the week. 

        viii.  Day-of-Year
Routing—routing of calls to single TOLL FREE number based on up to fifteen (15) customer-specified holidays. 

        ix.    Percent
Allocation Routing—routing of calls for each originating routing group to two (2) or more terminating, locations based on customer-specified
percentage. 

        Customer
will receive the Identification Services described above at no charge. The minutes of use rates for Toll Free Routing Options described above (in addition to the Toll Free
Routing Option Feature Charges described below) will be the same rates for CLASSIC CARRIER 2000 ORIGINATION Service described herein excluding Route Completion (Overflow). The Toll Free Routing Option
Feature Charges are as follows: 

         Installation Charge:    * per feature; maximum of * per TOLL FREE number. 

        Change Order Charge:    * per feature, maximum of * per TOLL FREE number. 

         Monthly Recurring Charge:    * per feature; maximum of * per TOLL FREE number. 

         Expedite Charge:    * (i.e., outside normal interval time of four (4) business days). 

        Note:
More than ten (10) points of termination for a single feature will be treated as two (2) features. Further, every additional ten (10) points of termination will be treated as a
separate feature. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

3

 

        (J)    RespOrg Services:    Responsible Organization Services
(relevant to TOLL FREE Numbers) if provided by MCI WorldCom will be provided by MCI WorldCom pursuant to MCI WorldCom's applicable tariffs (or the applicable tariffs of its affiliates). 

II.    CLASSIC 2000 CARRIER ORIGINATION SERVICE CHARGES.  

        (A)  For purposes of this Attachment, Customer's "Switched Services Revenue"
will be comprised of Customer's gross (i.e., prior to the application of discounts) measured and per call Switched Service charges described below (i.e., both domestic and international). 

        (B)  Rates Per Minute. 

        (i)    INTERSTATE 

* 

        (ii)  INTERSTATE
- Extended 

*

        (iii)  INTRASTATE
(NOT SUBJECT TO DISCOUNT). 

* 

        (iv)  CANADA
(NOT SUBJECT TO DISCOUNT). 

* 

III.  DISCOUNTS.  

        Commencing with the Effective Date and continuing through the end of the Service Term (including any applicable
extensions thereto), Customer's discount percentage for CLASSIC 2000 ORIGINATION Service (the "Discount") will be determined under the Discount Schedule
shown below based on Customer's actual Monthly Revenue for such month. Throughout the Service Term, Customer will automatically receive the next higher (or lower) Discount when Customer's eligible
Monthly Revenue (as defined in the PET) reaches the next level (or falls below a level). 

	*	 	*

IV.  CDR MEDIA.  

        MCI WorldCom will provide Call Detail Records (CDRs) for MCI WorldCom's Switched Services in machine readable form in one of several magnetic tape or optical
media formats (selected by Customer on Customer's Service Request) ("CDR Media"). CDR Media provided hereunder (i) monthly is provided at no charge,
(ii) weekly is subject to a recurring monthly charge of *, and (iii) daily is subject to the applicable non-recurring Installation Charge as described below (plus all leased-line and equipment costs
necessary to implement Daily CDR Media which will be determined on an individual case basis depending on Customer's specific configuration). 

*

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

4

 

        IN
WITNESS WHEREOF, authorized parties on behalf of their respective entities have initialed this Attachment for CLASSIC 2000 CARRIER ORIGINATION Service as of the date shown below. 

	
Ciera Network Systems, Inc.	
 	
WORLDCOM NETWORK SERVICES, INC.
	 	 	 	 	 
	Customer's Initials             [Illegible]            	 	MCI WorldCom's Initials             P.M.C.            
	

Date:	

5/8/2000	
 	

Date:	

5/11/00
	 	
	 	 	

ATTACHMENTS

Schedule
CL-A (Millennium) = SUPERSAVER LATAs

Schedule CL-B (Millennium) = PREMIUM LATAs 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

5

  

 
 

MCI WORLDCOM NETWORK SERVICES, INC.    
  

 
  AMENDMENT NO. 1    
  

        This Amendment No. 1 is made this 26 day of September, 2000, by and between Ciera Network Systems, Inc.
("Customer") and MCI WORLDCOM Network Services, Inc. (successor in interest to WorldCom Network Services, Inc.) ("MCI
WorldCom"), to those certain Program Enrollment Terms (the "PET") and the applicable Attachment(s) (the
"Attachment(s) to that certain Telecommunications Services Agreement, more particularly described as TSA # CNS-000524 made by and between Customer and
MCI WorldCom and dated May 8, 2000 (the "TSA"). In the event of any conflict between the terms of the TSA, the Attachment(s), or the PET and the
terms of this Amendment No. 1, the terms of this Amendment No. 1 shall control. The TSA, the PET, the Attachment(s), and this Amendment No. 1 are collectively referred to as the
"Agreement". 

        Customer
and MCI WorldCom agree for good and valuable consideration, intending legally to be bound, as follows: 

        A.    SPECIAL RATES:    Commencing, and effective, on a date to be chosen by MCI WorldCom in its sole discretion, but
within ten (10) business days after execution of this Amendment No. 1 by MCI WorldCom, and continuing through the end of the Service Term (including any extensions thereto), Subpart (xvii) of
Subsection 9(A) of the PET will be replaced in its entirety with the following: 

        (xvii)  CLASSIC
2000 CARRIER TERMINATION Service and CLASSIC 2000 END USER DEDICATED 1+ Service - Customer's rate per minute for calls from the 48 contiguous
United States to Mexico will be: 

        *

        B.    SPECIAL RATES:    Commencing, and effective, on a date to be chosen by MCI WorldCom in its sole discretion, but
within ten (10) business days after execution of this Amendment No. 1 by MCI WorldCom, and continuing through the end of the Service Term (including any extensions thereto), the following Subpart (xx)
will be added to Subsection 9(A) of the PET: 

        (xx) CALLING
CARD Service - Customer's rate per minute for Intrastate calls made within  Texas will be * 

        C.    OTHER TERMS AND CONDITIONS:    Except as specifically amended or modified herein, the terms and conditions of
the Agreement will remain in full force and effect throughout the Service Term and any extensions thereto. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

1

 

        IN WITNESS WHEREOF, Customer and MCI WorldCom have entered into this Amendment No. 1 on the date first written above. 

	
MCI WORLDCOM NETWORK SERVICES, INC.	
 	
CIERA NETWORK SYSTEMS, INC.
	

By:	

 	
 	

By:	

/s/ R. W. Livingston
	 	
 (Signature)	 	 	
 (Signature)
	

 	

 	
 	

Robert W. Livingston
	
 (Print Name)	 	
 (Print Name)
	

 	

 	
 	

CEO
	
 (Title)	 	
 (Title)
	

 	

 	
 	

9-26-2000
	
 (Date)	 	
 (Date)

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

  

 
 

MCI WORLDCOM NETWORK SERVICES, INC.    
  

 
 

AMENDMENT NO. 2    
  

        This Amendment No. 2 ("Amendment No. 2") is made this 14th day of March, 2001, by and between Ciera
Network Systems, Inc. ("Customer") and MCI WORLDCOM Network Services, Inc. (successor-in-interest to WorldCom Network Services, Inc.)
("MCI WorldCom"), to those certain Program Enrollment Terms (the "PET"), to that certain
Telecommunications Services Agreement more particularly described as TSA# CNS-000525 (the "TSA"), made by and between Customer and MCI WorldCom dated
May 8, 2000, including that certain Amendment No. 1 dated September 26, 2000. In the event of any conflict between the terms of the TSA, the PET, Amendment No. 1 or any
applicable Attachment and the terms of this Amendment No. 2, the terms of this Amendment No. 2 shall control. The TSA along with the PET, Amendment No. 1, all applicable
Attachment(s), and this Amendment No. 2 shall collectively be referred to as the "Agreement". Capitalized terms not defined herein shall have the
meaning ascribed to them in other documents referenced herein. 

        In
consideration of good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties agree as follows: 

        1.    SERVICE TERM.    As of March 1, 2001, the parties agree to substitute Section 1 of the  PET to read in its entirety as
follows: 

        1.    SERVICE TERM.    This Agreement shall commence as of May 25, 2000 (the
"Effective Date"), and shall continue for a period of forty-nine (49) months (the "Service Term"). Upon
expiration of the Service Term, the Switched Services in question will continue to be provided pursuant to the same
terms and conditions as are then in effect (including without limitation, the applicable rates, discounts and commitments, if any), subject to termination by either party upon thirty (30) days prior
written notice to the other party. 

        2.    CUSTOMER'S MINIMUM REVENUE COMMITMENT.    As of March 1, 2001, the parties agree to substitute Section 5
of the PET to read in its entirety as follows: 

        5.    CUSTOMER'S MINIMUM REVENUE COMMITMENT.    Commencing with the first day of the
fourteenth (14th) billing period following the Effective Date (as determined under Section 1 above) and continuing through the end of the Service Term (including any extensions thereto) (the
"Commitment Period"), Customer agrees to maintain, on a take-or-pay basis, Monthly Revenue (as defined in Section 2 above) of at least *
("Customer's Minimum Revenue Commitment"). 

        3.    OTHER TERMS AND CONDITIONS.    Except as specifically amended or modified herein, the terms and conditions of
the Agreement will remain in full force and effect throughout the Service Term and any extensions thereof. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

1

 

        IN WITNESS WHEREOF, the parties have entered into this Amendment No. 2 on the date first written above. 

	
CIERA NETWORK SYSTEMS, INC.	
 	
MCI WORLDCOM NETWORK SERVICES, INC.
	

By:	

/s/ Robert Livingston
	
 	

By:	

/s/ Peter M. Cassidy

	 	(Signature)	 	 	(Signature)
	

Robert W. Livingston
	
 	

Peter M. Cassidy

	(Print Name)	 	(Print Name)
	

CEO
	
 	

VP, Wholesale Services

	(Title)	 	(Title)
	

3-14-2001
	
 	

3/23/01

	(Date)	 	(Date)

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

  

 
 

MCI WORLDCOM NETWORK SERVICES, INC.    
  

 
  ATTACHMENT FOR CALLING CARD SERVICE    
  

        This Attachment for CALLING CARD Service is made by and between Ciera Network Systems, Inc.
("Customer") and MCI WORLDCOM Network Services, Inc. ("MCI WorldCom") and is a part of their
Telecommunications Services Agreement for Switched Services. Capitalized terms not defined herein shall have the meaning ascribed to them in the TSA, the PET, the applicable Attachment(s) or the
Tariff (as defined below), whichever is applicable. NOTE: ANY MODIFICATIONS, ADDITIONS OR DELETIONS FROM THIS ATTACHMENT WILL NOT BE EFFECTIVE UNLESS SPECIFICALLY SET FORTH IN
THE PET.

        During
the Service Term of the Agreement, MCI WorldCom will provide "CALLING CARD Service" which is accessed only by dialing the unique
toll free access number * assigned by MCI WorldCom to Customer. With respect to International Origination CALLING CARD Service and applicable Star (*) Features, this Attachment incorporates by
reference the terms of MCI Tariff FCC No. 1 (the "Tariff"), which may be modified from time to time by MCI WorldCom in accordance with law and thereby
affect the Services furnished Customer hereunder, except that the terms and conditions contained in the TSA, the PET or this Attachment shall supplement or, to the extent inconsistent, supersede the
Tariff terms and conditions. For purposes of this Attachment, references to "MCI FEATURE CARD Service (Option T)" or "Connections Card Service" will be deemed to refer to "CALLING CARD Service". *
ACCESS NUMBER MAY BE provided by Customer. 

I.    CALLING CARD SERVICE CHARGES.  

        (A)  For purposes of this Attachment, Customer's "Switched Services Revenue" will be comprised of (i) Customer's gross (i.e.,
prior to the application of discounts) measured and per call CALLING CARD Service charges described below (i.e., interstate, intrastate and international), (ii) Customer's Calling Card Service
Surcharges described below, and (iii) Customer's Calling Card Feature Service charges described below. Further, for purposes of this Attachment, "U.S." refers to the 48 contiguous United States and
"ECC" refers to Alaska, Hawaii, Puerto Rico and the United States Virgin Islands. 

        (B)  Rates Per Minute. 

        (i)    INTERSTATE 

*

        (ii)  INTRASTATE
(NOT SUBJECT TO DISCOUNT). 

* 

        (iii)  INTERNATIONAL
TERMINATION (NOT SUBJECT TO DISCOUNT). 

SEE
Schedule CC-A. 

        (iv)  INTERNATIONAL
ORIGINATION TERMINATING IN THE U.S. (NOT SUBJECT TO DISCOUNT). 

SEE
Schedule CC-B. 

        (v)  INTERNATIONAL
ORIGINATION TERMINATING IN AN INTERNATIONAL LOCATION (NOT SUBJECT TO DISCOUNT). 

The
rates will be the sum of (x) the applicable International Origination rates set forth on Schedule CC-A, and (y) the applicable International Termination rate set forth on Schedule CC-B. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

1

 

        (C)  Calls originating in an International Location will be billed in * increments and subject to a * charge. Calls utilizing
Feature Services described in Section VII below will be billed in * increments and subject to a * minimum charge. All other calls will be billed in * increments and subject to an * minimum charge. 

II.    CREDITS/DISCOUNTS.  

        (A)  Commencing with the Effective Date and continuing through the end of the Service Term (including any applicable
extensions thereto), Customer's discount percentage for CALLING CARD Service (the "Discount") will be determined under the Discount Schedule shown below
*. 

* 

        (B)  * 

III.  CALLING CARD SERVICE SURCHARGES.  

        (A)  The following CALLING CARD Service surcharges shall be charged per call according to the following schedule: 

*

IV.  FULFILLMENT.  

        If Customer elects to use MCI WorldCom for fulfillment, Customer shall pay MCI WorldCom the fulfillment charges associated with Customer's usage of CALLING CARD
Service, as determined by MCI WorldCom. 

V.    SET UP CHARGES.  

        Customer agrees to pay * for every instance of special branding (i.e., greeting and/or closing) requested by Customer in connection with CALLING CARD Service. 

VI.  FRAUD DETECTION PROCEDURES.  

        Customer shall be responsible for any and all fraud associated with its usage of CALLING CARD Service, except as set forth below: 

        (1)  All
calling card calls will be validated by MCI WorldCom to permit only those calls authorized or facilitated by Customer or legitimate card holders. MCI WorldCom will,
at the direction of Customer, preclude all calls utilizing expired or terminated calling card numbers compared against an authorized list provided by Customer and MCI WorldCom will be responsible for
all fraudulent use, unauthorized use, misuse, or abuse of calling cards occurring after MCI WorldCom receives actual notice of the expiration or termination of a calling card or receives specifically
detailed written notification concerning any card which has been lost, stolen, compromised or which Customer has reason to believe is or may be used fraudulently. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

  

        (2)  In
addition, all CALLING CARD Service calls will be monitored by MCI WorldCom for misuse on a twenty four (24) hour a day, seven (7) days a week basis. MCI WorldCom
shall establish fraud prevention, detection and minimization procedures so that fraudulent use arising from lost or stolen calling cards and potential disruption to authorized card holders will be
minimized. 

        (3)  MCI
WorldCom will not hold the Customer responsible for "Service Fraud" (as defined herein) associated with the unauthorized use of an MCI WorldCom CALLING CARD. For
purposes of this Attachment, "Service Fraud" shall consist of unauthorized use of an MCI WorldCom CALLING CARD following the involuntary theft or loss
of a card, which was not intentionally facilitated or authorized (either explicitly or implicitly) by Customer or an authorized user. Service Fraud often follows the theft of a wallet, purse or
briefcase, or sometimes is the result of "shoulder surfing" (thieves observing/recording authorization codes) which occurs at payphones located in airports, bus terminals, train stations and the like.
MCI WorldCom shall not be responsible for losses caused by fraudulent information submitted by a card holder in subscribing for calling card services or for usage which was intentionally facilitated
or authorized (either explicitly or implicitly) by an authorized user. 

        (4)  In
the event MCI WorldCom is unable to contact Customer of suspected abuse of the CALLING CARD Service, in order to minimize potential abuse, MCI WorldCom may deactivate
any calling card which has exceeded established fraud detection parameters or which MCI WorldCom has reason to believe is or may be used fraudulently. In such event MCI WorldCom will have no liability
to Customer or any End User in connection with such deactivation or failure to deactivate such calling card. 

VII. FEATURE SERVICES.  

        (A)  Customer agrees to pay the charges set forth below with respect to the features shown ("Feature
Services"): 

        (i)    Operator
Services 

*

        (ii)  Directory
Assistance 

*

        (iii)  Voice
News Network for calls within the U.S.: * 

        (iv)  Conference
Calling 

* 

*

        (v)  Flex
Routing: 

*

        (vi)  Message
Store and Forward 

* 

        (vii) Broadcast
Messages 

*

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

3

 

        (viii)  Speed
Dialing: 

*

        (B)  The feature charges described in Subsection VII.(A) above will be subject to the following discounts *. 

*

        (C)  * 

        IN
WITNESS WHEREOF, authorized parties on behalf of their respective entities have initialed this Attachment for CALLING CARD Service as of the date shown below. 

	CIERA NETWORK SYSTEMS, INC.	 	MCI WORLDCOM NETWORK SERVICES, INC.
	

Customer's Initials             /s/ [ILLEGIBLE]            	
 	

MCI WorldCom's
Initials:                                       
          
	

Date:	

9-26-2000	
 	

Date:	

 
	 	
	 	 	

ATTACHMENTS:

Schedule
CC-A = International Termination Rates (U.S. to International locations)

Schedule CC-B = International Origination Rates (International locations to U.S.) 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

4

 
 
 

Schedule CC-A    
  

	Calling Card International Termination Rates

	US to International

	* 5 pages

MCI
WorldCom—PROPRIETARY

Not for use or disclosure outside MCI WorldCom

except under written agreement 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

5

 
 
 

Schedule CC-B    
  

	Calling Card International Origination Rate

	International to US

	* 3 pages

MCI
WorldCom—PROPRIETARY

Not for use or disclosure outside MCI WorldCom

except under written agreement 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

6

  

 
 

MCI WORLDCOM NETWORK SERVICES, INC.
  ATTACHMENT FOR UNIVERSAL INTERNATIONAL FREEPHONE NUMBER ("UIFN") SERVICE    
  

        This Attachment for Universal International Freephone Number (UIFN) Service (the "UIFN
Attachment") is made this 26 day of September, 2000, by and between MCI WORLDCOM Network Services, Inc. ("MCI WorldCom")
and Ciera Network Systems, Inc. ("Customer") and is a part of their Telecommunications Services Agreement for Switched Services. Capitalized terms not
defined herein shall have the meaning ascribed to them in the TSA or the PET, as applicable. NOTE: ANY MODIFICATIONS, ADDITIONS OR DELETIONS FROM THIS ATTACHMENT WILL NOT BE
EFFECTIVE UNLESS SPECIFICALLY SET FORTH IN THE PET.

        1.    UIFN SERVICES:    

        (A)  During the UIFN Term (as described in Section 2 below) MCI WorldCom will provide (i) dedicated access universal
international freephone number service ("DEDICATED UIFN") which is the (x) international origination of calls by MCI WorldCom and the termination of
such calls to Customer's designated and MCI WorldCom approved Service Interconnection(s) in the 48 contiguous United States, or (y) international origination of calls by MCI WorldCom and the
termination of such calls to an End User's domestic United States private branch exchange ("PBX") or other customer premise equipment located in the 48
contiguous United States, or (ii) switched access universal international freephone number service ("SWITCHED UIFN") which is the international
origination of calls by MCI WorldCom and the termination of such calls to the 48 contiguous United States solely over facilities comprising the MCI WorldCom network. Subject to the provisions of this
UIFN Attachment, all terms and conditions set forth in the TSA and the PET will apply, to the extent applicable, to DEDICATED UIFN and SWITCHED UIFN provided hereunder. 

        (B)  In order to utilize DEDICATED ACCESS UIFN, one or more full time dedicated connections between (i) Customer's network in
the 48 contiguous United States and the MCI WorldCom network at one or more MCI WorldCom designated locations ("MCI WorldCom POP"), or (ii) an End
User's PBX or other customer premise equipment and the MCI WorldCom network at a MCI WorldCom POP must be established ("UIFN Interconnection(s)"). Each
UIFN Interconnection shall be comprised
of one or more DS-1 circuits. All provisions set forth in the PET relating to or referencing "Carrier Service Interconnections" or "Service Interconnections" shall be deemed to include UIFN
Interconnections. 

        2.    UIFN TERM:    The "UIFN
Term" will commence as of 9-26-2000 (the "Effective Date") and will be coterminous with the Service Term
described in the PET. At the end of the UIFN Term, the terms and conditions contained in this UIFN Attachment will remain in full force and effect until the earlier of (i) cancellation by either party
upon at least thirty (30) days' prior written notice to the other party, or (ii) the cancellation or scheduled termination of the TSA. 

        3.    UIFN RATES:    Commencing with the Effective Date and continuing
through the end of the UIFN Term, Customer's UIFN rates for DEDICATED UIFN and SWITCHED UIFN will be the * level of applicable charges shown on Schedule UIFN-A attached hereto and incorporated herein
by reference. [Note: If left blank, Customer's UIFN rates will be deemed to be the "Base UIFN Rates" shown on Schedule UIFN-A.] 

        4.    ACCESSIBILITY/AVAILABILITY:    MCI WorldCom will provide UIFN
Service subject to availability as determined solely by MCI WorldCom. Upon MCI WorldCom's receipt of a Service Order from Customer, MCI WorldCom will reserve and obtain for Customer a universal
international freephone number (the "UIFN Number") from the International Telecommunications Union (ITU). Customer agrees to pay MCI WorldCom a
nonrecurring fee of * per UIFN Number. MCI WorldCom will accept specific number requests, if available. The UIFN Number will be translated to a MCI 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

1

 

WorldCom designated 800 billing identification number. Customer acknowledges that each UIFN Number obtained for Customer must be activated within ninety (90) days from the date the UIFN Number is
reserved with the UIFN Registrar. In the event a UIFN Number is not activated within such 90-day period, Customer acknowledges such UIFN Number may be canceled. MCI WorldCom reserves the right upon
not less than ten (10) days' prior notice to terminate UIFN Service relative to any UIFN Number which does not generate at least sixty (60) minutes of traffic during any consecutive six (6) months. 

        5.    START OF SERVICE:    Start of Service for (i) DEDICATED UIFN
will occur concurrently with the activation of each circuit comprising Service Interconnections relevant to DEDICATED UIFN, and (ii) SWITCHED UIFN will occur on an UIFN Number by UIFN Number basis
concurrently with the activation of each UIFN Number. 

        6.    LIMITATION OF ORIGINATION OR TERMINATION LOCATIONS:    

        (a)  DEDICATED
UIFN: (i) origination is available from those countries shown on Schedule UIFN-B as such Schedule may be amended or modified from time to time by
MCI WorldCom, and (ii) termination is available to locations in the 48 contiguous United States. 

        (b)  SWITCHED
ITFS: (i) origination is available from those countries shown on Schedule UIFN-A as such Schedule may be amended from time to time by MCI WorldCom,
and (ii) termination is available to locations in the 48 contiguous United States. 

        7.    CDR MEDIA.    MCI WorldCom will provide Call Detail Records
(CDRs) for MCI WorldCom's Switched Services in machine readable form in one of several magnetic tape formats (selected by Customer on Customer's Service Request) ("CDR
Media"). CDR Media provided hereunder (i) monthly is provided at no charge, (ii) weekly is subject to a recurring monthly charge of *, and (iii) daily is subject to the
applicable non-recurring Installation Charge as described below (plus all leased-line and equipment costs necessary to implement Daily CDR Media which will be determined on an individual case basis
depending on Customer's specific configuration). 

        *

        IN WITNESS WHEREOF, authorized parties on behalf of their respective entities have initialed this Attachment for UNIVERSAL INTERNATIONAL
FREEPHONE NUMBER Service as of the date shown below. 

	MCI WORLDCOM NETWORK SERVICES, INC.	 	CIERA NETWORK SYSTEMS, INC.
	

MCI WorldCom's Initials	

 	
 	

Customer's Initials	

[ILLEGIBLE]
	

Date:	

 	
 	

Date: 9-26-2000	

 

ATTACHMENTS:

        Schedule
UIFN-A = Universal International Freephone Number Service Rates 

        Schedule
UIFN-B = UIFN Countries 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

 
 
 

Classic Millennium UIFN Rates
  (UIFN rates are not discountable)    
  

        * 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

3

 
 
 

Schedule B-UIFN Country Availability    
  

	UIFN COUNTRY
	 	INT'L Access Code

	Australia	 	0011
	Belgium*	 	00
	Denmark	 	00
	France	 	00
	Germany	 	00
	Hong Kong	 	001
	Ireland*	 	00
	Israel*	 	00
	Japan	 	0061, 001 or 0041
	Korea (South)	 	001, 002
	Malaysia*	 	00
	Netherlands**	 	00
	New Zealand	 	00
	Norway	 	00
	The Philippines*	 	00
	Singapore*	 	001
	Spain*	 	00
	Sweden*	 	009
	Switzerland	 	00
	Taiwan**	 	002
	Thailand*	 	001
	United Kingdom	 	00

*
These countries are ONLY available on Advanced Toll Free Service UIFN.

** These countries are ONLY available on Classic, Access Based Billing and Transcend UIFN. 

All
other countries are available on all products. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

4

QuickLinks

ADDENDUM FOR ASYNCHRONOUS TRANSFER MODE (ATM) SERVICE

MCI WORLDCOM NETWORK SERVICES, INC. TELECOMMUNICATIONS SERVICES AGREEMENT (Switched Services)

MCI WORLDCOM NETWORK SERVICES, INC. PROGRAM ENROLLMENT TERMS (Switched Services)

WORLDCOM NETWORK SERVICES, INC.

ATTACHMENT FOR CLASSIC 2000 SWITCHLESS/END USER DEDICATED SERVICES

WORLDCOM NETWORK SERVICES, INC.

Schedule CL-A Classic Millennium SuperSaver LATA's

Schedule CL-B Classic Millenium Premium LATA's

Schedule CL-C Classic Millennium International Rates

MCI WORLDCOM NETWORK SERVICES, INC. CLASSIC SWITCHED SERVICES

Schedule 1 Classic Millennium ITFS Rates

Schedule 1 Classic Millennium ITFS Rates

WORLDCOM NETWORK SERVICES, INC. ATTACHMENT FOR CLASSIC 2000 CARRIER ORIGINATION SERVICE

MCI WORLDCOM NETWORK SERVICES, INC.

AMENDMENT NO. 1

MCI WORLDCOM NETWORK SERVICES, INC.

AMENDMENT NO. 2

MCI WORLDCOM NETWORK SERVICES, INC.

ATTACHMENT FOR CALLING CARD SERVICE

Schedule CC-A

Schedule CC-B

MCI WORLDCOM NETWORK SERVICES, INC. ATTACHMENT FOR UNIVERSAL INTERNATIONAL FREEPHONE NUMBER ("UIFN") SERVICE

Classic Millennium UIFN Rates (UIFN rates are not discountable)

Schedule B-UIFN Country AvailabilityQuickLinks
 -- Click here to rapidly navigate through this document

 
  CARRIER SERVICE AGREEMENT    
    
    BETWEEN    
    
    GLOBAL CROSSING BANDWIDTH, INC.    
    
    AND    
    
    CIERA NETWORK SYSTEMS, INC.    

* CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS. 

  

 
 

TABLE OF CONTENTS    
  

	SECTION
 
	 	 

	1.	 	Services; Forecasts; PIU Certification; Service Orders
	2.	 	Term Of The Agreement
	3.	 	Billing And Payment; Rates And Charges; Security; Minimum Charges
	4.	 	Billing Disputes
	5.	 	Termination Rights
	6.	 	Taxes And Assessments
	7.	 	Warranties And Limitation Of Liability
	8.	 	Indemnification
	9.	 	Representation
	10.	 	Force Majeure
	11.	 	Waivers
	12.	 	Assignment
	13.	 	Confidentiality
	14.	 	Integration
	15.	 	Construction
	16.	 	Governing Law
	17.	 	Notices
	18.	 	Counterparts
	19.	 	Compliance With Laws
	20.	 	Third Parties
	21.	 	Survival Of Provisions
	22.	 	Unenforceable Provisions
	23.	 	Cumulative Rights And Remedies
	24.	 	Amendments
	25.	 	Authority

GENERIC EXHIBITS  

	Exhibit A	 	Definitions
	Exhibit B	 	Ancillary Fee Schedule
	Exhibit B(a)	 	Automated Feature Provisioning Schedule
	Exhibit C	 	Call Detail Records; Electronic Data Exchange; Letter Of Agency Requirements

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2

 

SERVICE SPECIFIC EXHIBITS  

	Exhibit D	 	Dedicated Carrier Termination Schedule	 	 	 	 
	Exhibit D(a)	 	Carrier Domestic Termination Service	 	—	 	Interstate / Intrastate
	Exhibit E	 	Dedicated Carrier Termination International Schedule	 	 	 	 
	Exhibit E(a)	 	Carrier Termination International Service	 	 	 	 
	Exhibit F	 	Toll-Free Carrier Transport Schedule	 	 	 	 
	Exhibit F(a)	 	Carrier Toll-Free Transport Service	 	—	 	Interstate / Intrastate
	Exhibit G	 	National Origination Service (NOS) Switched Outbound Schedule	 	 	 	 
	Exhibit G(a)	 	National Origination Service (NOS) Switched Outbound Service	 	 	 	 
	Exhibit H	 	National Origination Service (NOS) Switched and Dedicated Toll Free Schedule	 	 	 	 
	Exhibit H(a)	 	National Origination Service (NOS) Switched and Dedicated Toll Free Service	 	 	 	 
	Exhibit I	 	National Origination Service (NOS) Dedicated Outbound Schedule	 	 	 	 
	Exhibit I(a)	 	National Origination Service (NOS) Dedicated Outbound Service	 	 	 	 
	Exhibit J	 	National Origination Service (NOS) Switched International Schedule	 	 	 	 
	Exhibit J(a)	 	National Origination Service (NOS) Switched International Service	 	 	 	 
	Exhibit K	 	National Origination Service (NOS) Dedicated International Schedule	 	 	 	 
	Exhibit K(a)	 	National Origination Service (NOS) Dedicated International Service	 	 	 	 
	Exhibit L	 	CIC Transport Service Schedule	 	 	 	 
	Exhibit L(a)	 	CIC Transport Service	 	—	 	Interstate
	Exhibit L(b)	 	CIC Transport Service	 	—	 	Intrastate
	Exhibit M	 	Colocation Service	 	 	 	 
	Exhibit M(a)	 	Colocation Schedule	 	 	 	 
	Exhibit N	 	Network Interconnection Schedule	 	 	 	 

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3

  

 
 

CARRIER SERVICES AGREEMENT    
  

        This Carrier Services Agreement ("Agreement") is entered into between Global Crossing Bandwidth, Inc., on
behalf of itself and its affiliates that may provide a portion of the services hereunder ("Global Crossing"), a California corporation located at 90
Castilian Drive, Goleta, CA 93117 and Ciera Network Systems, Inc. ("Ciera" or "Purchaser"), a
Texas corporation with its principal place of business located at 2630 Fountainview Street, Suite 300, Houston, Texas 77057. (Hereinafter, Global Crossing and Ciera may be referred to in the aggregate
as "Parties", and each singularly as a "Party".) 

 
 

PURPOSE    
  

        The Parties are telecommunications carriers subject to the Communications Act of 1934, as amended, as well as the Telecommunications Act of 1996. Ciera desires to
purchase network transport and other telecommunication services from Global Crossing for Ciera's resale to its customers. For valuable consideration, receipt of which is hereby acknowledged, the
Parties hereto agree as follows: 

	1.
	SERVICES; FORECASTS; PIU CERTIFICATION; SERVICE ORDERS:

	1.1
	Global
Crossing shall, in accordance with this Agreement, provide to Ciera those services Ciera subscribes to hereunder as defined and identified herein and on exhibits, schedules and
other attachments appended hereto and made a part of this Agreement from time to time by the Parties (collectively, the "Exhibits"). All such services
being provided under the Exhibits are collectively referred to as the "Services" and individually as a  "Service".

	1.2
	Network
performance is a function of carrier network engineering and Global Crossing will be dependent in significant part upon Ciera's forecasts and projections as it configures,
engineers and
augments its network for optimum performance and to effectively handle Ciera's anticipated traffic volumes. Global Crossing expects that Ciera has identified such traffic volumes for the usage-based
Services over the term of this Agreement and therefore Ciera shall provide Global Crossing with good faith forecasts of Ciera's expected monthly traffic volume and geographic distribution for each
usage-based Service over a three month period. Forecasts shall be provided at least 90 days in advance of the forecasted period (and updated more frequently if a submitted forecast is no longer
accurate). The initial forecast shall be provided prior to or on the Effective Date of this Agreement. Forecasts shall be in the format supplied by Global Crossing, which format Global Crossing may
revise from time to time during the term hereof. Provision of Services is contingent on the availability of Global Crossing facilities.

	1.3
	With
respect to: (i) outbound Services originating on dedicated facilities and terminated by Global Crossing on switched facilities (and for which ANIs are not passed to Global
Crossing), and (ii) toll-free Services originating on switched facilities and terminated by Global Crossing on dedicated facilities, Ciera shall provide a good faith certification
as to its percentage of interstate usage ("PIU") for its minutes of usage ("MOU") forecasted under
Section1.2 hereof. The initial certification shall be provided prior to the Effective Date of this Agreement and updated when requested by Global Crossing. The certification shall be in the format
supplied by Global Crossing, which format Global Crossing may revise from time to time during the term hereof.

	1.4
	Orders
for the Services shall be transmitted and processed in accordance with Global Crossing's then-current, standard order procedures and guidelines, as well as any
procedures set out in the applicable Exhibit for a specific Service (as such procedures and guidelines may be modified from time to time by Global Crossing upon prior written notice to Ciera). 

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2

 

	1.5
	Terms,
conditions and guidelines for call detail records and electronic data exchange are set out in the attached Exhibit C (as such terms, conditions and guidelines may be
modified from time to time by Global Crossing upon prior written notice to Ciera). 

	2.
	TERM OF THE AGREEMENT:

	2.1
	INITIAL TERM: This Agreement is effective and the Parties' obligations commence upon the date of execution by Global Crossing
("Effective Date") and continues in effect for a period of one (1) year ("Initial Term") from the
earlier of the date any of the Services are first utilized by Ciera (as determined by Global Crossing's records), or the 90th day after the Effective Date, which date shall be deemed the  "Start of Service Date".

	2.2
	AUTOMATIC RENEWAL: This Agreement renews automatically for successive one year periods at the expiration of the Initial Term, unless
otherwise canceled in accordance with the termination provisions of this Agreement.

	2.3
	CANCELLATION: Either Party may terminate this Agreement upon expiration of a term upon written notice given at least 90 days
prior to expiration of the then-current term.

	2.4
	The
Parties acknowledge and agree that, except with respect to termination of this Agreement for a Party's uncured breach, termination of this Agreement may not terminate certain of
the Services, such as the Private Line Services and the CarrierConnectSM Dedicated Internet Access Services, the term for each being set out in the applicable Services Schedules. 

	3.
	BILLING AND PAYMENT; RATES AND CHARGES; SECURITY; MINIMUM CHARGES:

	3.1
	Ciera
shall pay Global Crossing for the Services at the rates, fees and charges set forth below and in the applicable Exhibits. Ciera is liable for all charges for the Services,
including without limitation, any fraudulent usage charges and short duration calls. If Ciera is required to provide security hereunder, then Global Crossing is not obligated to accept orders, or
provide or continue to provide any Services, until the required security is received by Global Crossing. If Ciera is an existing customer of Global Crossing, the rates and charges set forth herein
shall be effective with Ciera's first full Billing Cycle following the later of the Effective Date of this Agreement or the date Global Crossing receives any security required hereunder.

	3.2
	*

*
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3

 

	3.3
	Ciera
shall provide Global Crossing with security as outlined below: 

	1.
	Ciera
shall provide Global Crossing with security in the following forms:

	(i)
	A
Corporate Guaranty from CCC Globalcom Corp. and,

	(ii)
	*

	2.
	Ciera
shall pay for the Services via weekly estimated payments that are subject to true-up each month as follows:

	(i)
	*

	(ii)
	* 

*
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4

 

	(iii)
	*

	 	Wire Transfer Instructions:

Firstar Bank, N.A.

425 Walnut Street

Cincinnati, OH 45201

ABA # 042000013

For Credit to: Global Crossing Bandwidth, Inc. (fka Frontier Communications Services, Inc.)

Special Instructions: For further credit to
 (Ciera's Account Number)

	3.4
	Global
Crossing agrees to take commercially reasonable efforts to invoice Ciera via facsimile on or about the fifth Business Day after the close of each Billing Cycle for the Services
and for any other sums due Global Crossing ("Invoice"). Any outstanding balance due on an Invoice after application of the weekly estimated payments
shall be paid by Ciera via wire transfer of immediately available U.S. funds within forty-eight (48) hours of the Invoice date. The Parties agree that (i) the Invoice date will be the
same day the Invoice is faxed to Ciera, and (ii) the Invoice will be faxed on a Business Day and followed by a confirmation copy sent via first class U.S. mail. 

*
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5

 

	3.5
	Global
Crossing may, immediately and without any notice, proceed with its remedies under Section 5.5 hereof if any weekly estimated payment is not fully and timely made
pursuant to Section 3.3, or any outstanding Invoice amount is not paid within the twenty-four (24) hour period pursuant to Section 3.4.

	3.6
	The
Ciera facsimile number and contact for purposes of this Section 3. are 713-914-3870, Attention: Bob Livingston, CEO. Ciera may change the facsimile
number and contact upon written notice to Global Crossing.

	3.7
	Ciera
agrees to pay Global Crossing for any costs incurred by Global Crossing, including without limitation, internal administration costs and any local service provider contract
termination charges, with respect to ordered circuits, local loops or other Services canceled prior to installation or the completion of any term commitment made by Ciera under this Agreement for such
circuit, local loop or Services. Further, Ciera may be liable for additional early termination or cancellation charges as set out in the Ancillary Fee Schedule. In addition, Ciera agrees to pay to
Global Crossing any and all local exchange carrier ("LEC") assessed charges (other than access charges otherwise included under the pricing in this
Agreement), third party and governmental and regulatory charges or assessments levied upon Global Crossing as a result of Services provided to Ciera, such as but not limited to:

	A.
	Third-party
 pass-through charges and pass-through charges mandated or permitted by regulatory agencies, including but not limited to, payphone dial-around
compensation surcharges and PICC charges, plus any reasonable administrative charge Global Crossing may establish for its wholesale customers for administering such pass-through charges.
Global Crossing reserves the right to bill Ciera in advance for any third party charges to the extent Global Crossing is billed in advance for the same; and

	B.
	When
 Global Crossing is acting as the RespOrg, National Administrative Services Center assessments (including any monthly recurring charges) for toll-free service installation; and

	C.
	Reasonable
 administrative charges for implementation of ordering, network routing, billing, provisioning or other support services outside of Global Crossing's normal procedures and support
services; and

	D.
	Applicable
 ancillary fees and charges set out in the attached Exhibit B and B(a), as the same may be modified from time to time by Global Crossing upon written notice to Ciera. 

        If Ciera subscribes to a Service for which payphone surcharges would be applicable, then in lieu of the payphone surcharge pass-through under A.
above, Global Crossing may agree, at its sole discretion, to permit Ciera to directly assume the responsibility and liability for the reporting and payment of payphone surcharges in accordance with
the terms of a separate written agreement between the Parties.
If such a separate agreement is signed by the Parties and Ciera does not comply with its terms, Global Crossing may, notwithstanding such agreement, pass through payphone dial-around
surcharges in accordance with A. above and Ciera agrees to pay the same. 

*
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6

 

	3.8
	Ciera
shall be liable for the following minimum usage charge(s) commencing with Ciera's Billing Cycle that starts in the second month following the Start of Service Date (the  "Minimum Charge").

	MINIMUM PERIOD	 	MINIMUM CHARGE
	2nd and each month thereafter	 	                *

        If during the Minimum Period Ciera's net charges (after any available discounts hereunder) for the Services are less than the Minimum Charge, Ciera shall pay the
shortfall. Governmental assessments and surcharges, non-recurring charges, operator assistance charges and local loop and third party and regulatory pass-through charges are
not included when calculating the Minimum Charge. If this Agreement is terminated prior to the time the Minimum Charge becomes effective (other than termination by Ciera for an uncured breach by
Global Crossing), Ciera shall be liable for the amount described in Section 5.5.E hereof. 

	3.9
	Global
Crossing may revise the rates, monthly recurring and other charges in this Agreement and the Exhibits at any time upon written notice to Ciera. Unless a later effective date is
otherwise stated in the notice, domestic and offshore rates are effective within 30 days and international rates are effective within seven days of the date of Global Crossing's written notice.

	3.10
	Ciera
agrees that any make up to minimum charges, shortfall charges and surcharges for which it is liable under this Agreement are based on agreed upon minimum commitments on its
part and corresponding rate concessions on Global Crossing's part, and are not penalties or consequential or other damages under Section 7.3 hereof.

	3.11
	Ciera
agrees that a breach of any other agreement it may have with Global Crossing or a Global Crossing Affiliate shall be deemed a material breach of this Agreement.

	3.12
	Ciera
and Global Crossing understand that Ciera is in the process of purchasing the assets of one of Global Crossing's existing customers, Equal Net, as part of a Chapter
11reorganization of that customer, and that Ciera and Equal Net have not yet completed, nor has the Bankruptcy Court yet approved said asset purchase. Accordingly, if the asset purchase does not occur
and receive court approval within sixty (60) days of Global Crossing's execution of the Agreement, then Ciera shall no longer be liable on a go forward basis for the minimum usage charges
indicated in section 3.8 of this Agreement and Global Crossing may revise the rates indicated in this Agreement and the Exhibits by * across the board at any time upon written notice to Ciera. 

	4.
	BILLING DISPUTES:

        Ciera
shall have the affirmative obligation of providing written notice of any dispute with an Invoice
within 90 days after receipt of the Invoice by Ciera (which notice shall include sufficient detail for Global Crossing to investigate the dispute). Claims of fraudulent usage shall not
constitute a valid basis for a dispute. Ciera may not withhold payment of disputed amounts. If Ciera does not report a dispute with respect to an Invoice within the 90 day period, Ciera is
deemed to have waived its dispute rights for that Invoice and to have agreed to pay the same. Provided Ciera has provided sufficient detail for investigation of the dispute, Global Crossing will use
reasonable efforts to resolve and communicate its resolution of the dispute within 30 Business Days of its receipt of the dispute notice. If a dispute is not resolved within the 30 Business Days
period to Ciera satisfaction, then at Ciera request the dispute will be referred to an executive officer of Global Crossing. If the dispute is not resolved within 15 Business Days after the referral,
then Ciera may commence an action in accordance with Section 16, provided that the prevailing Party in such action shall be entitled to the payment of reasonable attorney fees and costs by the
other Party. 

*
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7

  

	5.
	TERMINATION RIGHTS:

	5.1
	REGULATORY
CHANGES: If the FCC, a state PUC or a court of competent jurisdiction issues a rule, regulation, law or order which has the effect of canceling, changing, or superseding
any material term or provision of this Agreement (collectively, "Regulatory Requirement"), then this Agreement shall be deemed modified in such a way as
the Parties mutually agree is consistent with the form, intent and purpose of this Agreement and is necessary to comply with such Regulatory Requirement. Should the Parties not be able to agree on
modifications necessary to comply with a Regulatory Requirement within 30 days after the Regulatory Requirement is effective, then upon written notice either Party may, to the extent
practicable, terminate that portion of this Agreement impacted by the Regulatory Requirement.

	5.2
	Either
Party may terminate this Agreement upon the other Party's insolvency, dissolution or cessation of business operations.

	5.3
	Global
Crossing may, upon written notice, immediately terminate this Agreement for (i) Ciera's failure to pay any delinquent Invoice, or (ii) to pay any security or
additional security within the time-frame required under this Agreement.

	5.4
	In
the event of a breach of any material term or condition of this Agreement by a Party (other than a failure to pay or provide security which is covered under Sections 3.5 and 5.3
above), the other Party may terminate this Agreement upon 30 days written notice, unless the breaching Party cures the breach during the 30 day period. A breach that cannot be reasonably
cured within a 30 day period may be addressed by a written waiver of this paragraph signed by the Parties.

	5.5
	Upon
any material breach by Ciera not cured after expiration of all applicable notice and cure periods, if any, Global Crossing may at its sole option do any or all of the following:

	A.
	Cease
 accepting or processing orders for Service and suspend Service;

	B.
	Cease
 all electronically and manually generated information and reports (including any CDR not paid for by Ciera);

	C.
	Draw
 on any letter of credit, security deposit or other assurance of payment and enforce any security interest provided by Ciera;

	D.
	Terminate
 this Agreement and the Services without liability to Global Crossing;

	E.
	Collect
 from Ciera an amount equal to the Minimum Charge for the remaining portion of the unexpired term of this Agreement; and

	F.
	Pursue
 such other legal or equitable remedy or relief as may be appropriate. 

	6.
	TAXES AND ASSESSMENTS:

        Ciera
is responsible for the collection and remittance of all governmental assessments, surcharges and fees pertaining to its resale of the Services (other than taxes on Global
Crossing's net income) (collectively, "Taxes"). Ciera shall provide Global Crossing with, and maintain, valid and properly executed certificate(s) of
exemption for the Taxes, as applicable. 

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2

 
	7.
	WARRANTIES AND LIMITATION OF LIABILITY:

	7.1
	Global
Crossing warrants that the Services shall be provided on a digital fiber optic network that meets the applicable technical standards established for call transport by the
telecommunications industry, including Telcordia (formerly BellCore) publication #SRT-SV-002275, with a grade of service of P.01 and SS7 signaling, where available.  GLOBAL CROSSING MAKES NO OTHER WARRANTY, EXPRESS OR IMPLIED,
WITH RESPECT TO TRANSMISSION, EQUIPMENT OR SERVICE
PROVIDED HEREUNDER, AND EXPRESSLY DISCLAIMS ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR FUNCTION.

	7.2
	CIERA AGREES THAT ITS SOLE REMEDY IN THE EVENT OF ANY BREACH OF THE WARRANTIES DESCRIBED IN THIS SECTION 7 SHALL BE (i) THE OUTAGE CREDITS DESCRIBED IN
ANY SCHEDULE FOR A PARTICULAR SERVICE PROVIDED HEREUNDER; OR, (ii) WITH RESPECT TO THE OTHER SERVICES, TERMINATION OF THIS AGREEMENT PURSUANT TO SECTION 5.4.

	7.3
	In
no event shall either Party be liable to the other Party for incidental and consequential damages, loss of goodwill, anticipated profit, or other claims for indirect damages in any
manner related to this Agreement or the Services. 

	8.
	INDEMNIFICATION:

        Each
Party shall defend and indemnify the other Party and its directors, officers, employees, representatives and agents from any and all claims, taxes, penalties, interest, expenses,
damages, lawsuits or other liabilities (including without limitation, reasonable attorney fees and court costs) relating to or arising out of (i) the operation of its business, and
(ii) its breach of this Agreement; provided, however, Global Crossing shall not be liable and shall not be obligated to indemnify Ciera, and Ciera shall defend and indemnify Global Crossing
hereunder, for any claims by any third party, including End-Users, with respect to services provided by Ciera which may incorporate any of Global Crossing's services. 

	9.
	REPRESENTATION:

        The
Parties acknowledge and agree that the relationship between them is solely that of independent contractors. Neither Party, nor their respective employees, agents or representatives,
has any right, power or authority to act or create any obligation, express or implied, on behalf of the other Party. 

	10.
	FORCE MAJEURE:

        Other
than with respect to failure to make payments due hereunder, neither Party shall be liable under this Agreement for delays, failures to perform, damages, losses or destruction, or
malfunction of any equipment, or any consequence thereof, caused by, or due to fire, earthquake, flood, water, the elements, third party labor disputes, utility curtailments, power failures,
explosions, civil disturbances, governmental actions, shortages of equipment or supplies, unavailability of transportation, acts or omissions of third parties, or any other cause beyond its reasonable
control. 

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3

 
	11.
	WAIVERS:

        No
waiver of any term or condition of this Agreement shall be enforceable unless it is in writing and signed by the Party against whom it is sought to be charged. No failure or delay by
either Party in exercising any right, power or remedy will operate as a waiver of any such right, power or remedy, unless otherwise provided herein. The waiver by either Party of any of the covenants,
conditions or agreements to be performed by the other or any breach thereof shall not operate or be construed as a waiver of any subsequent breach of any such covenant, condition or agreement. 

	12.
	ASSIGNMENT:

        Neither
Party may assign or transfer its rights or obligations under this Agreement without the other Party's written consent, which consent may not be unreasonably delayed or withheld,
except that Global Crossing may assign this Agreement to its Affiliates or successor-in-interest without Ciera's consent. Any assignment or transfer without the required
consent is void. 

	13.
	CONFIDENTIALITY:

	13.1
	Each
Party agrees that all information furnished to it by the other Party, or to which it has access under this Agreement, shall be deemed the confidential and proprietary
information or trade secrets (collectively referred to as "Proprietary Information") of the Disclosing Party and shall remain the sole and exclusive
property of the Disclosing Party (the Party furnishing the Proprietary Information referred to as the "Disclosing Party" and the other Party referred to
as the "Receiving Party"). Each Party shall treat the Proprietary Information and the contents of this Agreement in a confidential manner and, except to
the extent necessary in connection with the performance of its obligations under this Agreement, neither Party may directly or indirectly disclose the same to anyone other than its employees on a need
to know basis and who agree to be bound by the terms of this Section, without the written consent of the Disclosing Party.

	13.2
	The
confidentiality of obligations of this Section do not apply to any portion of the Proprietary Information which is (i) or becomes public knowledge through no fault of the
Receiving Party; (ii) in the lawful possession of Receiving Party prior to disclosure to it by the Disclosing Party (as confirmed by the Receiving Party's records); (iii) disclosed to
the Receiving Party without restriction on disclosure by a person who has the lawful right to disclose the information; or (iv) disclosed pursuant to the lawful requirements or formal request
of a governmental agency. If the Receiving Party is requested or legally
compelled by a governmental agency to disclose any of the Proprietary Information of the Disclosing Party, the Receiving Party agrees that it will provide the Disclosing Party with prompt written
notice of such requests so that the Disclosing Party has the opportunity to pursue its legal and equitable remedies regarding potential disclosure.

	13.3
	Each
Party acknowledges that its breach or threatened breach of this Section may cause the Disclosing Party irreparable harm which would not be adequately compensated by monetary
damages. Accordingly, in the event of any such breach or threatened breach, the Receiving Party agrees that equitable relief, including temporary or permanent injunctions, is an available remedy in
addition to any legal remedies to which the Disclosing Party may be entitled.

	13.4
	Neither
Party may use the name, logo, trade name, service marks, trade marks, or printed materials of the other Party, in any promotional or advertising material, statement,
document, press release or broadcast without the prior written consent of the other Party, which consent may be granted or withheld at the other Party's sole discretion. 

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4

 

	14.
	INTEGRATION:

        This
Agreement and all Exhibits, schedules and other attachments incorporated herein, represent the entire agreement between the Parties with respect to the subject matter hereof and
supersede and merge all prior agreements, promises, understandings, statements, representations, warranties, indemnities and inducements to the making of this Agreement relied upon by either Party,
whether written or oral. 

	15.
	CONSTRUCTION:

        The
language used in this Agreement is deemed the language chosen by the Parties to express their mutual intent. No rule of strict construction shall be applied against either Party. 

	16.
	GOVERNING LAW:

        Global
Crossing currently maintains regional service and operations centers to support customer accounts in New York, California and Michigan. This Agreement will be construed and
enforced in
accordance with the law of the state where Ciera's account is supported, as designated by Global Crossing in this Agreement or as designated in Exhibits or amendments to this Agreement, without regard
to that state's choice of law principles. The Parties agree that any action related to this Agreement shall be brought and maintained only: (i) in the Superior court of the State of California
for the County of Santa Barbara, if the designated customer support center is located in California; (ii) in a Federal or State court of competent jurisdiction located in Monroe County, New
York, if the designated customer support center is located in New York; or (iii) in the Federal District Court for the Eastern District of Michigan or a State court of competent jurisdiction
located in Oakland County, Michigan, if the designated customer support center is located in Michigan. The Parties each consent to the jurisdiction and venue of such courts and waive any right to
object to such jurisdiction and venue. 

	17.
	NOTICES:

        All
notices, including but not limited to, demands, requests and other communications required or permitted hereunder (not including Invoices) shall be in writing and shall be deemed
given: (i) when delivered in person, (ii) 24 hours after deposit with an overnight delivery service for next day delivery, (iii) the same day when sent by facsimile
transmission during normal business hours, receipt confirmed by sender's equipment, or (iv) three Business Days after deposit in the United States mail, postage prepaid, registered or certified
mail, return receipt requested, and addressed to the recipient Party at the address set forth below: 

	If to Global Crossing:	 	Global Crossing Bandwidth, Inc.

180 South Clinton Avenue

Rochester, New York 14646

Attn: Senior Vice President, North American Carrier Services

Facsimile #: 716-232-9168
	

with a copy to:	
 	

Global Crossing Bandwidth, Inc.

90 Castilian Drive

Goleta, CA 93117

Attn: Peggy Palak, Manager, National Contract Admin.

Facsimile #: (800) 689-2395
	

If to Ciera	
 	

Ciera Network Systems, Inc.

2630 Fountainview Street. Suite 300,

Houston, Texas 77057

Attn: Robert W. Livingston, President

Facsimile #: (713) 914-3870

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

5

 
	18.
	COUNTERPARTS:

        This Agreement may be executed in several counterparts, each of which shall constitute an original, but all of which shall constitute one and the same instrument. 

	19.
	COMPLIANCE WITH LAWS:

        During
the term of this Agreement, the Parties shall comply with all local, state and federal laws and regulations applicable to this Agreement and to their respective businesses.
Further, each Party shall obtain, file and maintain any tariffs, permits, certifications, authorizations, licenses or similar documentation as may be required by the FCC, a state Public Utility or
Service Commission, or any other governmental body or agency having jurisdiction over its business ("Authorizations"). Upon the request of a Party,
which request shall be no more frequent than once every six months (unless based on a request or an order of a governmental body or agency having jurisdiction over either Party), the other Party will
provide copies of the requested Authorizations. 

	20.
	THIRD PARTIES:

        The
provisions of this Agreement and the rights and obligations created hereunder are intended for the sole benefit of Global Crossing and Ciera, and do not create any right, claim or
benefit on the part of any person not a Party to this Agreement, including End-Users. 

	21.
	SURVIVAL OF PROVISIONS:

        Any
obligations of the Parties relating to monies owed, as well as those provisions relating to confidentiality, limitations on liability and indemnification, shall survive termination
of this Agreement. 

	22.
	UNENFORCEABILITY OF PROVISIONS:

        The
illegality or unenforceability of any provision of this Agreement does not affect the legality or enforceability of any other provision or portion. If any provision or portion of
this Agreement is deemed illegal or unenforceable for any reason, there shall be deemed to be made such minimum change in such provision or portion as is necessary to make it valid and enforceable as
so modified. 

	23.
	CUMULATIVE RIGHTS AND REMEDIES:

        Except
as may otherwise be provided herein, the assertion by a Party of any right or the obtaining of any remedy hereunder shall not preclude such Party from asserting or obtaining any
other right or remedy, at law or in equity, hereunder. 

	24.
	AMENDMENTS:

        This
Agreement is voidable by Global Crossing if the text is modified by Ciera without the written or initialed consent of a Global Crossing Vice President. Except as may otherwise be
provided herein, any amendments or modifications to this Agreement must be in writing and signed by a Global Crossing Vice President (or higher level officer) and an authorized officer of Ciera. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

6

 
	25.
	AUTHORITY:

        Each
individual executing below on behalf of a Party hereby represents and warrants to the other Party that such individual is duly authorized to so execute, and to deliver, this
Agreement. By its signature below, each Party acknowledges and agrees that sufficient allowance has been made for review of this Agreement by respective counsel and that each Party has been advised by
its legal counsel as to its legal rights, duties and obligations under this Agreement. 

        IN
WITNESS WHEREOF, the Parties have executed this Agreement on the dates set forth below. 

	Global Crossing Bandwidth, Inc.	 	Ciera Network Systems, Inc.
	By:  
	 	By:  

	Barrett O. MacCheyne, Senior Vice President

North American Carrier Services	 	Robert W. Livingston, President
	Date:  
	 	Date:  

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

7

  

Exhibit A

Page 1 of 4  

 
 

DEFINITIONS
  (not otherwise defined in the body of the Agreement or an Exhibit)    

	1.
	Global Crossing Toll-free Numbers are toll-free telephone numbers ordered onto the Global Crossing network by
Ciera and for which Global Crossing has either: (i) been appointed the RespOrg, or (ii) reserved and issued the toll-free telephone number to Ciera. Global Crossing shall be
deemed to be the RespOrg for all toll-free telephone numbers reserved and issued by it under (ii) above.

	2.
	ANI is an End-User telephone line used for outbound switched Services.

	3.
	Billing Cycle is the Global Crossing billing cycle to which Ciera's account hereunder is assigned by Global Crossing (a full billing
cycle approximates 30 days).

	4.
	Business Day is Monday through Friday, 8:00 am to 5:00 PM EST, excluding nationally recognized holidays. Unless otherwise stated,  "days" refers to calendar days.

	5.
	Presubscribed means that an End-User's ANI(s) has been assigned by the LEC to Global Crossing's network via Global
Crossing's CIC.

	6.
	Carrier Toll-free Numbers are toll-free telephone numbers ordered onto the Global Crossing network by Ciera for
which a party other than Global Crossing or Ciera has been appointed the RespOrg.

	7.
	Code is a calling card authorization number used to access the Calling Card Services.

	8.
	Ciera Toll-free Numbers are toll-free telephone numbers ordered onto the Global Crossing network by Ciera for
which Ciera has been appointed the RespOrg.

	9.
	End-Users are customers of Ciera receiving any of the Services hereunder. To the extent that Ciera subscribes to the
Services for its own use, Ciera is deemed to be an End-User.

	10.
	Toll-free Numbers collectively refer to the Global Crossing Toll-free Numbers, Carrier Toll-free
Numbers, Ciera Toll-free Numbers and PIN Toll-free Numbers.

	11.
	Toll-free Number Guidelines refer to the telecommunications industry's general rules with respect to toll-free
number portability, including but not limited to, (i) the Federal Communications Commission's ("FCC") toll-free number portability
policies and rules, and (ii) the Industry Guidelines for Toll-free Number Administration sponsored by ATIS, as either of the foregoing may be replaced or modified from time to time.

	12.
	PIN Toll-free Numbers are Global Crossing Toll-free Numbers assigned to Ciera for use with the
Toll-free PIN Service.

	13.
	RespOrg is a responsible organization as defined in the Guidelines. A RespOrg is the entity that is responsible for managing and
administering the account records in the Toll-free Service Management System DataBase. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

 
Exhibit A

Page 2 of 4  

	14.
	Time Point (TP) is the measurement method for call duration. TP-1 is the "request for service event"; TP-6 is
the "answer detected event"; TP-7 is the "call disconnect event". Calls for all Services (other than dedicated carrier Toll-free transport, CIC Transport and Pseudo CIC
Transport) are measured at TP-7 minus TP-6 times three and divided by 60. Dedicated carrier Toll-free calls are measured at TP-7 minus TP-1.
CIC Transport/Pseudo CIC Transport calls that are routed to Ciera's switch for terminations are measured at TP-7 minus TP-1. CIC Transport/Pseudo CIC Transport calls that
terminate on Global Crossing's network are measured at TP-7 minus TP-6.

	15.
	Delinquent (whether capitalized or not) means any Invoiced amounts not properly disputed under Section 4 of this Agreement and
remaining unpaid on the Invoice's Due Date.

	16.
	Affiliate means any entity directly or indirectly controlling, controlled by or under common control with a Party.

	17.
	Calling Card Services consist of calling card traffic generated via Codes.

	18.
	Toll-free PIN Service consists of inbound Switched Services combined with a PIN Toll-free Number accessed via
four digit personal identification numbers ("PIN Numbers") used by End-Users ("0000", "4663", "9675" and "9999" are not available as PIN
Numbers). The use of the PIN Numbers with a PIN Toll-free Number permits multiple End-Users to utilize the same toll-free telephone number on an individual basis.
Toll-free Directory Assistance is not available with the Toll-free PIN Service.

	19.
	Toll-free Directory Assistance consists of calls made to directory providers for assistance in locating a Global Crossing
toll-free Number.

	20.
	NOS Dedicated Services consist of: (i) End-User switched outbound long distance traffic delivered to a Global
Crossing Point of Presence ("POP") via dedicated facilities and terminated over the Global Crossing network, and (ii) switched
toll-free traffic generated via Toll-free Numbers which traffic originates on the Global Crossing network and is terminated by Global Crossing onto Ciera's or an
End-User's dedicated facilities.

	21.
	NOS Switched Services consist of switched inbound and outbound long distance traffic generated by End-Users that originates
and terminates on the Global Crossing network.

	22.
	National Origination Services ("NOS"): collectively, includes the NOS Switched Services, the NOS Dedicated Services and related
toll-free and international traffic.

	23.
	Dedicated Carrier Termination consists of switched outbound long distance traffic delivered by Ciera to a Global Crossing POP via
dedicated facilities and terminated over the Global Crossing network.

	24.
	Dedicated Toll-free Transport consists of Global Crossing's routing of Ciera's toll-free calls originating on
Global Crossing's network to Ciera's facilities for termination by Ciera.

	25.
	Domestic means the 48 contiguous United States.

	26.
	Off-Shore means Alaska, Hawaii, Puerto Rico and the U.S. Virgin Islands. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

3

 
Exhibit A

Page 3 of 4  

	27.
	Private Line Services consist of point-to-point DS-1, DS-3, OC-3 and
OC-12 circuit capacity provided over Global Crossing's SONET network.

	28.
	Audiotext are calls terminating to Interactive Voice Response equipment containing databases that enable callers to select options for
the types of information they wish to hear or receive.

	29.
	Operator Services see Operator Services Schedule. Operator Services specifically exclude calling card operator assistance calls made
via Codes, which are deemed to be part of the Calling Card Services.

	30.
	CIC (Carrier Identification Code): is a three or four digit number issued by Bellcore and used by a LEC (and others) to identify a long
distance carrier.

	31.
	Sub-CIC Service: consists of switched outbound long distance traffic generated by End-Users that are PIC'd to
Ciera's CIC. Ciera CIC is "translated" or pointed at Global Crossing's Feature Group D trunks so that Ciera's traffic reaches the Global Crossing network via shared Feature Group D trunks.

	32.
	Area Code Blocking: provides the ability to block toll-free calls that originate from certain area codes.
End-Users can allow or disallow area codes.

	33.
	Area Code Routing: provides End-Users the ability to route calls to a predetermined location based on originating area
code. Calls may be routed to a maximum of 15 different numbers.

	34.
	Time of Day Routing: provides End-User the ability to route calls to a maximum of four (4) different locations based
on time of day that the call originates (in half hour increments).

	35.
	Percent Call Allocation Routing: provides End-Users the ability to route calls to multiple centers (or ANIs) based on a
predetermined percentage of calls received as follows.

	•
	10
Locations, each receives 10% of calls

	•
	4
Locations, each receives 25% of calls

	•
	3
Locations, each receives 33% of calls

	•
	2
Locations, one receives 75% of calls, the other location 25%

	•
	2
Locations, one receives 90% of calls, the other 10% 

	36.
	6-Digit Routing/Blocking: provides End-User the ability to route or prevent the completion of
toll-free calls based on NPA-NXX.

	37.
	10-Digit routing/Blocking: provides End-Users the ability to route or prevent the completion of
toll-free calls based on NPA-NXX-XXXX.

	38.
	CarrierConnectSM Dedicated Internet Access Service: offers direct access to Global Crossing's nationwide IP network via
DS-1 or DS-3 access circuits. The connectivity is over a circuit between the Ciera's router to the Global Crossing's access router located at an IP Point of Presence. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

4

 
Exhibit A

Page 4 of 4  

	39.
	CIC Transport: consists of Ciera's switched outbound traffic that originates on Global Crossing's shared feature group D facilities, in
a LEC region where Ciera's CIC has been translated to the Global Crossing network, and upon reaching the Global Crossing network is routed by CIC over dedicated facilities to Ciera's switch for
termination. Ciera's end-users are presubscribed to Ciera's CIC.

	40.
	Pseudo-CIC Transport: consists of Ciera's switched outbound traffic that originates on Global Crossing's shared feature
group D facilities and upon reaching the Global Crossing network is routed by pseudo CIC over dedicated facilities to Ciera's switch for termination. Ciera's end-users are presubscribed to
Global Crossing's CIC.

	41.
	Pseudo CIC: is a Global Crossing derived four-digit routing number assigned to Ciera for purposes of routing Ciera's Pseudo
CIC Transport traffic.

	42.
	Optical Wavelength: is a fiber optic, transponder based, point to point (POP to POP) offering that provides high capacity, unprotected
bandwidth tailored specifically for data.

	43.
	Call Jurisdiction: for Carrier Domestic Termination and Carrier Toll Free Transport is based on the location where the call originates
on Global Crossing's network and the location where Global Crossing's network terminates the call. This jurisdiction will be either interstate, intrastate or intralata. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

5

  

Exhibit B

Page 1 of 2  

 
 

Schedule of Ancillary Fees    
  

*

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

 
Exhibit B

Page 2 of 2  

 
 

Schedule of Ancillary Fees    
  

* 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

3

 
Exhibit B(a)

Page 1 of 3  

 
 

Schedule of Ancillary Fees
  For Toll-Free Services
  Automated Feature Provisioning (AFP) Schedule    
  

        Automated Feature Provisioning (AFP) is an enhancement to Global Crossing's web-based application
uCommand that allows Ciera to provision combinations of routing features as well as pre-define secondary routing profiles. Using AFP enables Global Crossing's customers to provision the
following features on their toll free numbers. 

	•
	Info Digit Screening—Block unwanted calls and control Ciera pay phone surcharge costs. Block
calls based on the type of telephone the caller is calling from, like pay phones or prison phones.

	•
	Info Digit Routing—Route and control calls based on telephone line type. Route calls to Ciera's
specific destination.

	•
	Point of Origination Blocking (3 / 6 / 10 digit blocking)—Allows or disallows calls based on the
originating NPA, NPA-NXX, or 10-digit number.

	•
	Point of Origination Routing (3 / 6 / 10 digit routing)—Route calls to a predetermined location
based on originating NPA, NPA-XXX, or 10-digit number.

	•
	Time of Day Routing—Route calls to different locations based on the time and day of the week.
Direct toll-free calls to an alternate location or department after regular business hours.

	•
	Day of Year—Route calls to a different location based on day of year.

	•
	Percent Call Allocation—Ciera can distribute toll-free calls evenly among Ciera's
call centers, or allocate more calls to larger call centers—all with one very versatile, toll-free number.

	•
	Pre-defined Alternate Routing Profiles—Set-up alternate routing profiles,
and activate them in various situations. Support Ciera during end customer outages, traffic surges, and seasonal traffic patterns. 

        Once
a profile (a specific set of features) is defined, multiple toll free numbers can be assigned to it. To further assist Ciera Global Crossing has incorporated all the appropriate
edits and validations into uCommand, and added "Help" functionality to every screen. Finally, to aid in navigation Global Crossing has added search capabilities allowing searches by toll free number. 

 
 

Definitions    
  

        Profile: A set of specific routing features created by Ciera to which Ciera shall then add end-user
toll free numbers that require those specific routing features. The profile is usually referred to as "Standard Profile." 

        Pre-defined Alternate Routing Profile (the "Pre-dAR"): A routing feature profile that does not contain
toll-free numbers. Ciera shall have the capability to provision the routing feature profile for back up during downtime, traffic surges, and seasonal traffic patterns. This is a profile
without a toll free number assigned to it. It is available in case a routing change is necessary. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

4

  

Exhibit B(a)

Page 2 of 3  

Pricing Terms and Conditions  

Ciera Provisioned  

        Ciera will immediately benefit from provisioning their toll free numbers and routing features. In addition to the convenience of provisioning, profile
installations and changes made by Ciera through the web-based application will be at no cost to Ciera. 

	•
	Standard
and Pre-dAR Profiles may be set-up with any combination of routing features, and any number of toll-free number
listings.

	•
	The
MRC charges will be gathered and applied on Ciera's monthly Invoices. The toll-free numbers that exist on Ciera's profiles will be counted,
and the MRC rate per number applied.

	•
	The
NRC charge will not apply if Ciera installs and provisions their toll-free routing through AFP.

	•
	The
AFP Change Surcharge will not be charged for a change submitted to a Profile through AFP. 

Global Crossing Provisioned  

        At Ciera's request Global Crossing will provision Ciera's Standard and Pre-dAR Profiles with or without routing features, and with or without toll
free numbers. To complete Ciera's request Global Crossing will apply a charge for new profile installations (NRC) and any feature or toll free number changes (AFP Change Surcharge). 

	•
	The
Standard Profile and Pre-dAR Profiles may be set-up with any combination of routing features, and any number of
toll-free number listings.

	•
	The
MRC charges will be gathered and applied on Ciera's monthly Invoices. The toll-free numbers that exist on Ciera's profiles will be counted,
and the MRC rate per number applied.

	•
	The
NRC charge is a flat rate applied to each new Standard or Pre-dAR Profile created. The Global Crossing provisioning charge for installing a
new Standard or Pre-dAR Profile is a NRC of * with routing features, and a NRC of * without routing features.

	•
	The
AFP Change Surcharge for Global Crossing provisioning will be applied at the Standard or Pre-dAR Profile level. The surcharge will be
assessed for a change submitted to a Profile, and will be recognized as a profile revision (profile revisions are defined as any addition(s) or modification(s) made to the routing features or toll
free numbers). Deletion of routing features and/or toll free numbers will not be assessed an AFP Change Surcharge. 

        Global
Crossing provisioning of "Point of Origination Routing or Blocking (features)" for the customer is limited to 100 NPAs per profile. A request for greater than 100 NPAs will
require a quote from Global Crossing. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

 
Exhibit B(a)

Page 3 of 3  

 
 

Ciera Provisioned Pricing    
  

*

 
 

Global Crossing's Provisioned Pricing    
  

* 

Disclaimer  

        Automated Feature Provisioning (AFP) is provided "as is" without warranty of any kind, either expressed or
implied, including suitability for the particular purpose that Ciera has in mind when using it. Global Crossing will use reasonable efforts to maintain the AFP web-based application, but
is not responsible for the results of any incorrect information input or decisions made by the customer during the provisioning process. Global Crossing accepts no liability for errors made through
the system, it is the sole responsibility of Ciera. Global Crossing will not be responsible for any lost profits or other consequential damages that may result from the use of AFP. 

        Information
and procedures on this web-based application may be changed or updated without notice. Global Crossing may also make improvements and/or changes in the product
and/or the application programs described in this information at any time without notice. 

        Any
comments or materials sent to Global Crossing including feedback, such as questions, comments, suggestions, or the like regarding the content of any such documents (collectively
"Feedback"), shall be deemed non-proprietary information. Global Crossing shall have no obligation of any kind with respect
to such feedback and shall be free to reproduce, use, disclose, exhibit, display, transform, create derivative works and distribute the feedback to others without limitation. Further, Global Crossing
shall be free to use any ideas, concepts, know-how or techniques contained in such feedback for any purpose whatsoever, including but not limited to developing, manufacturing and marketing
products incorporating such feedback. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

3

  

Exhibit C

Page 1 of 4  

 
 

Call Detail Records; Electronic Data Exchange
  Letter of Agency Requirements    
  

I.    Call Detail Records; End-User DataBase Access.  

	1.
	If
Ciera requires call detail records ("CDR") for the Services it has the option of (i) receiving CDR on a monthly basis via
CD-ROM or magnetic tape ("CDR Tape"), and/or (ii) receiving CDR on a daily basis via electronic data exchange, which may include
dial-in remote access, on-line access via the Internet or such other method made available by Global Crossing (collectively, "Electronic
Exchange"). CDR must be rated by Ciera at its rates in order for it to bill its End-Users.

	2.
	If
Ciera elects 1.(i), then on or about the fifth Business Day following the end of a Billing Cycle, Global Crossing will deposit with an overnight delivery service for delivery to
Ciera a CDR Tape for the media selected by Ciera in the format established by Global Crossing.

	3.
	If
Ciera elects 1.(ii), then Global Crossing will make CDR available to Ciera on a daily basis via the Electronic Exchange method available from Global Crossing as selected by Ciera.
Ciera is liable for all transmission charges as well as the cost of hardware and software compatible with Global Crossing's systems as necessary for its use of Electronic Exchange.

	4.
	Electronic
Exchange will provide Ciera with access to its End-User information and records resident on certain of Global Crossing's systems. Such access will allow Ciera to
add and delete ANIs, Toll-Free Numbers, Codes and PIN Numbers, as well as to terminate accounts and check trouble ticket status and history. Ciera agrees to comply with the following
acceptable use policies, procedures and security measures for Ciera's use of Electronic Exchange. Global Crossing reserves the right to immediately discontinue Ciera's Electronic Exchange access if
Global Crossing determines in its reasonable business judgment that Ciera is using Electronic Exchange or information obtained therefrom in a manner detrimental to Global Crossing or in violation of
said policies, procedures or security measures or the confidentiality provisions of this Agreement. 

II.    Global Crossing Network Acceptable Use Policy for Electronic Exchange  

        All Global Crossing and its affiliated companies' (collectively, "Global Crossing") computer, network and information systems Users are responsible for reviewing
and complying with this Acceptable Use Policy. 

        Global
Crossing systems and all information on Global Crossing systems are the property of Global Crossing. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

 
Exhibit C

Page 2 of 4  

 Acceptable Use  

        Use of Global Crossing electronic and information facilities shall be for the sole purpose of the User's business relationship with Global Crossing ("Business
Purpose"). 

        Users
must adhere to the following policies, in addition to any other published guidelines or restrictions that Global Crossing may from time to time implement. 

	•
	Use
of System IDs must be within the normal authorized use for the ID.

	•
	Users
with special User IDs must ensure that only appropriate access is used and that access is not utilized for non-Business Purposes.

	•
	The
Global Crossing Technical Support Department must be contacted immediately if access to Global Crossing information or systems exceeds access
authorizations for a System ID.

	•
	The
Global Crossing Technical Support Department must be contacted when access to information, systems or use of a System ID is no longer required.

	•
	System
ID Users must comply with all instructions issued by Global Crossing security administrators or authorized management representatives with respect to
the use of, or password change for, any System ID. 

 Unacceptable Use  

	1.
	Users
are not allowed to use any Global Crossing system for personal, illegal, or unauthorized uses or non-Business Purposes. 

        Unacceptable
activities and use include, but are not limited to: 

	•
	Personal
recreational activities

	•
	Personal
business

	•
	Sending,
receiving, transferring, or storing any material contrary to any Global Crossing policy.

	•
	Using
a computer system to violate any Global Crossing policy.

	•
	Configuring
any Global Crossing system in any way to limit access (without authorization) or withholding encryption keys, access passwords, or any other
security keys from authorized Global Crossing representatives.

	•
	Removing
without authorization, withholding return, hiding or disguising, etc. any computer, communications, or electronic system. 

	2.
	It
is not acceptable to use Global Crossing services or facilities for any purpose which violates federal, state or local laws, or to transmit any communication which would likely be
offensive to any recipients, including without limitation:

	•
	Sending,
receiving, transferring, or storing proprietary information not in accordance with the User's business relationship with Global Crossing (including
unauthorized publication of proprietary information)

	•
	Using
any service or system to transmit threats

	•
	Soliciting
others to break any federal, state or local laws or regulations. 

	3.
	It
is not acceptable to use Global Crossing services or facilities so as to interfere with or gain access to any information a User is not authorized to access, or to disrupt Global
Crossing's or another network's users, services or equipment. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

3

 
Exhibit C

Page 3 of 4  

        Such
interference or disruption includes, but is not limited to: 

	•
	Using
System IDs or passwords that are not assigned to the User

	•
	Attempting
to access information to which the User has not been granted access

	•
	Exceeding
normal User privileges or using privileges for unauthorized acts

	•
	Probing
or tampering with any security feature or file

	•
	Modifying,
copying, or deleting any security related file without written or electronic authorization

	•
	Exploiting
or disclosing (except to the Global Crossing Environment Safety & Security Department) any security vulnerability

	•
	Propagation
of computer worms or viruses

	•
	Transmissions
of any type or quantity that causes disruption of service to others

	•
	Using
network access to make unauthorized entry, or any other unacceptable use, to other computational, information or communications devices or resources

	•
	Sending,
receiving, transferring, storing, or using sniffers, spoofers, hacking scripts, counterfeiting software, etc. (commonly known as burglary tools) 

 Enforcement and Violations  

        The Global Crossing Environment Safety & Security Department will investigate alleged violations of this Acceptable Use Policy. Global Crossing intends to
comply with all federal, state and local regulations that require reporting of illegal activities to law enforcement officials and if Global Crossing becomes aware of illegal activities, Global
Crossing reserves the right to notify the appropriate law enforcement agencies. 

        Violations
of this policy may result in cancellation of User/System IDs, access to Global Crossing systems or facilities and termination of the underlying business relationship between
Global Crossing and the User's organization. 

        Global
Crossing reserves the right to modify this policy at any time with or without prior notice. 

        Telephone
Number to report concerns: GCESS Hotline: 1-800-224-3804. 

III.  Letter of Agency Requirements.  

        Ciera is solely responsible for obtaining and maintaining valid letters of agency from Presubscribed End-Users in accordance with the following: 

	1.
	Global
Crossing acknowledges that at times Ciera may obtain End-Users through telemarketing and tape recorded third party verifications in accordance with FCC Guideline
Subpart K section 64.1100 (c) as the same may be amended, interpreted or clarified ("Verbal LOA"). Ciera understands that most LECs will
not accept Verbal LOAs as valid authorization for a change of long distance carriers and agrees that for End-Users located in such LECs' jurisdictions it will use Written LOAs. When Ciera
uses written letters of agency ("Written LOAs") it shall use formats that comply with FCC Guideline Subpart K section 64.1150 and any state
specific guidelines, as all of the same may be amended, interpreted or clarified. Ciera shall retain all Verbal LOA tapes and transcripts and Written LOAs used
and promptly make the originals available upon the request of Global Crossing, a LEC or a regulatory agency. Verbal LOAs and Written LOAs are collectively referred to as  "LOAs". 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

4

 
Exhibit C

Page 4 of 4  

 
 

Call Detail Records; Electronic Data Exchange
  Letter of Agency Requirements    
  

	2.
	Ciera
agrees that a proper and valid Verbal LOA may be used to presubscribe an End-User to Global Crossing, but that unless a Verbal LOA is accepted by the LEC or the
appropriate regulatory agency as proper documentation, the Verbal LOA will not be accepted by Global Crossing as documentation with respect to any PIC or "slamming" claims. Except as it may otherwise
agree in writing, Global Crossing is not obligated to "work" PIC disputes with respect to "slamming" or similar claims from End-Users. Global Crossing will, at its option, either
participate in a LEC's PIC switchback process or refer slamming inquiries to Ciera for resolution. In either event, Global Crossing may pass through any charges imposed on Global Crossing for PIC
claims related to Ciera, including without limitation, PIC charges or any other charges and penalties imposed by a LEC or a regulatory agency with respect to such claims, plus a Global Crossing
administration fee in accordance with Global Crossing's then-current slamming policies and guidelines, which policies guidelines Global Crossing may modify from time to time upon written
notice to Ciera (collectively, "PIC Charges"). PIC Charges will be billed to Ciera periodically on an Invoice. If any slamming claims are brought
against Ciera, then in addition to Global Crossing's right to assess PIC Charges and to terminate the Agreement for breach, Global Crossing may suspend order processing, Electronic Exchange and the
Services until the claim is resolved. Ciera shall defend and indemnify Global Crossing against any and all claims, including without limitation, any End-User, LEC
or regulatory agency claims (including "slamming claims"), arising from or related to Ciera's use or failure to use or provide valid LOAs.

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

5

  

Exhibit D

Page 1 of 2  

 
 

Carrier Termination Schedule    
  

	*
	

	1.
	For
domestic and international traffic originating from Ciera's switch, Ciera shall pay the applicable rates set out in the attached pricing schedules.

	2.
	Each
DS-1 circuit interconnecting Ciera to one of the Global Crossing POPs set out in the attached Network Interconnections Schedule has a monthly minimum usage requirement
of * minutes. Global Crossing may add or delete a POP at any time upon written notice. If a circuit experiences a minimum shortfall over two consecutive Billing Cycles, Global Crossing may provide
Ciera with written notice of such fact and of Global Crossing's intent to disconnect the under-minimum circuit if the minimum is not attained by the Billing Cycle commencing after the date the notice
is received. Ciera shall reimburse Global Crossing for any termination fees or charges paid by Global Crossing to the circuit provider for early disconnection of such circuit.

	3.
	Unless
otherwise agreed by Global Crossing in writing, Ciera shall be responsible, at its sole expense, for all ordering of, and charges for, dedicated facilities and equipment
required to maintain access, interconnection and interface with Global Crossing's equipment and network.

	4.
	If
in any given month more than *of Ciera's total domestic dedicated carrier traffic terminates to a non-RBOC/GTE franchised region, Global Crossing may apply a * per
minute surcharge to all of such traffic in excess of the *. If there is a change in Ciera's interstate/intrastate traffic profile which adversely impacts Global Crossing's rate structure, regardless
of Ciera's PIU Certification, Global Crossing reserves the right to revise the pricing schedule. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

 
Exhibit D

Page 2 of 2  

 
 

Gateway Carrier Service
  LATA Gateway Table    
  

	Northeast
 
	 	Southeast
	 	Midwest
	 	Southwest
	 	West

	120	 	420	 	234	 	532	 	486	 	638
	122	 	422	 	254	 	534	 	488	 	648
	124	 	424	 	256	 	620	 	490	 	650
	126	 	428	 	320	 	624	 	492	 	652
	128	 	430	 	322	 	626	 	526	 	654
	130	 	432	 	324	 	628	 	528	 	666
	132	 	434	 	325	 	630	 	530	 	668
	133	 	436	 	326	 	632	 	536	 	670
	134	 	438	 	330	 	634	 	538	 	672
	136	 	440	 	332	 	635	 	540	 	674
	138	 	442	 	334	 	636	 	542	 	676
	140	 	444	 	336	 	640	 	544	 	720
	220	 	446	 	338	 	644	 	546	 	721
	222	 	448	 	340	 	646	 	548	 	722
	224	 	450	 	342	 	922	 	550	 	724
	226	 	452	 	344	 	923	 	552	 	726
	228	 	454	 	346	 	924	 	554	 	728
	230	 	456	 	348	 	932	 	556	 	730
	232	 	458	 	350	 	937	 	558	 	732
	236	 	460	 	352	 	938	 	560	 	734
	238	 	464	 	354	 	958	 	562	 	736
	240	 	468	 	356	 	976	 	564	 	738
	242	 	470	 	358	 	977	 	566	 	740
	244	 	472	 	360	 	978	 	568	 	832
	246	 	474	 	362	 	 	 	570	 	834
	248	 	476	 	364	 	 	 	656	 	960
	250	 	477	 	366	 	 	 	658	 	963
	252	 	478	 	368	 	 	 	660	 	973
	426	 	480	 	370	 	 	 	664	 	981
	920	 	482	 	374	 	 	 	961	 	 
	921	 	484	 	376	 	 	 	980	 	 
	927	 	939	 	462	 	 	 	 	 	 
	928	 	949	 	466	 	 	 	 	 	 
	929	 	951	 	520	 	 	 	 	 	 
	974	 	952	 	521	 	 	 	 	 	 
	 	 	953	 	522	 	 	 	 	 	 
	 	 	956	 	524	 	 	 	 	 	 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

3

 
Exhibit D(a)

Page 1 of 6  

 
 

Carrier Domestic Termination Service    
  

	*
	6
Pages 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

4

  

Exhibit E

Page 1 of 1  

 
 

Carrier Termination
  International Services Schedule    
  

	*
	

	1.
	For
Dedicated Carrier Termination International Services, Ciera shall pay the international rates set out in the attached pricing schedules.

	2.
	For
International Directory Assistance Services, if available, Ciera shall pay the applicable standard Global Crossing resale rates in effect when calls are made. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

 
Exhibit E(a)

Page 1 of 6  

 
 

Carrier Termination International Service    
  

	*
	6
Pages 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

3

  

Exhibit F

Page 1 of 1  

  
 

    Carrier Toll-Free Transport Schedule    
  

	*
	

	1.
	In
order to protect the integrity of its network Global Crossing may, without liability, temporarily block any Toll-Free Number having usage surges. Global Crossing agrees
to use reasonable efforts to promptly notify Ciera after blockage has occurred.

	2.
	At
Ciera's written request and to the extent available to Global Crossing, Toll-Free Directory Assistance is available for Global Crossing Toll-Free Numbers
only. Due to the fact that Toll-Free Directory Assistance is provided through an arrangement with a third party, the provision of Toll-Free Directory Assistance by Global
Crossing is subject to the policies and procedures promulgated from time to time by such third party. Ciera understands that any Global Crossing Toll-Free Number listed with
Toll-Free Directory Assistance is not published in any written directory, but is only available on a call-in basis.

	3.
	The
transfer of Toll-Free Numbers to another carrier is subject to the Guidelines and the Global Crossing policies and procedures for Toll-Free number/traffic
transfers in effect at the time of the requested transfer.

	4.
	Ciera
acknowledges and agrees that all call records detail (CDR) for Toll Free transport it receives from Global Crossing may not match billable CSR's from Ciera's switch as Global
Crossing bills Ciera for all calls completed to their switch at Time point 7 minus Time point 1,(regardless of whether the call is completed to the called party).

	5.
	For
Toll-Free Carrier Transport traffic, Ciera shall pay the rates set out in the attached pricing schedules. If in any given month more than * of Ciera's total domestic
dedicated Toll-Free Carrier Transport Services traffic originates from non-RBOC/GTE regions, Global Crossing may apply a * per minute surcharge to all such traffic in excess of
the *. If there is a change in Ciera's interstate/intrastate traffic profile which adversely impacts Global Crossing's rate structure, regardless of Ciera's PIU Certification, Global Crossing reserves
the right to revise the pricing schedule. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

1

 
Exhibit F(a)

Page 1 of 7  

  
 

    Carrier Toll Free Transport Service    
  

	*
	7
pages 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

  

Exhibit G

Page 1 of 1  

  
 

    National Origination Service (NOS)
  Switched Outbound Services Schedule    
  

	*
	

	1.
	For
NOS Switched Outbound Services, Ciera shall pay the rates set out in the attached pricing schedule. If in any given month more than * of Ciera's total domestic switched outbound
traffic originates from, or terminates to, non-RBOC/GTE regions, Global Crossing may apply a * per minute surcharge to all such traffic in excess of *

	2.
	Upon
Ciera's request, Global Crossing will provide Ciera with an available 700 number (1-700-555-XXXX) and a recorded message that identifies Ciera
to Presubscribed End-Users as their carrier. Global Crossing will make the 700 number available for Ciera's use within 15 Business Days after receipt of the request. Ciera shall pay the
applicable 700 Number charges set out in Exhibit B of the Agreement. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

 
Exhibit G(a)

Page 1 of 2  

 
 

National Origination Service (NOS)
  Switched Out-Bound Service    
  

	*
	2
Pages 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

3

  

Exhibit H

Page 1 of 1  

 
 

National Origination Service (NOS)
  Switched & Dedicated
  Toll-Free Services Schedule    
  

	*
	

	1.
	Toll-Free
Number Requirements.

	A.
	In
order to protect the integrity of its network Global Crossing may, without liability, temporarily block any Toll-Free Number having usage surges. Global Crossing agrees
to use reasonable efforts to promptly notify Ciera after blockage has occurred.

	B.
	If
usage of an Toll-Free Number impacts Global Crossing in such a manner that the unbillable (non-completed) calls for such Toll-Free Number in any
month are greater than * of the billable (completed) calls for such Toll-Free Number in that month, Global Crossing may charge Ciera a non-discountable * charge for each
unbillable call in that month.

	C.
	At
Ciera's written request and to the extent available to Global Crossing, Toll-Free Directory Assistance is available for Global Crossing Toll-Free Numbers
only. Due to the fact that Toll-Free Directory Assistance is provided through an arrangement with a third party, the provision of Toll-Free Directory Assistance by Global
Crossing is subject to the policies and procedures promulgated from time to time by such third party. Ciera understands that any Global Crossing Toll-Free Number listed with
Toll-Free Directory Assistance is not published in any written directory, but is only available on a call-in basis.

	D.
	The
transfer of Toll-Free Numbers to another carrier is subject to the Guidelines and the Global Crossing policies and procedures for Toll-Free number/traffic
transfers in effect at the time of the requested transfer.

	E.
	If
an Toll-Free Number is blocked at Ciera's request, then for the period the Toll-Free Number is being blocked Global Crossing will, at Ciera's written request
and expense, re-translate the Toll-Free Number to Ciera's customer service telephone number. 

	2.
	For
Toll-Free Services traffic, Ciera shall pay the rates set out in the attached pricing schedules. If in any given month more than * of Ciera's total domestic
Toll-Free Services traffic originates from, or terminates to, non-RBOC/GTE regions, Global Crossing may apply a * per minute surcharge to all such traffic in excess of the *. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

 
Exhibit H(a)

Page 1 of 6  

 
 

National Origination Service
  Switched Toll Free Service    
  

	*
	6
Pages 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

3

  

Exhibit I

Page 1 of 1  

 
 

National Origination Service (NOS)
  Dedicated Outbound Services Schedule    
  

	*
	

	1.
	NOS
Dedicated Outbound Services are available from the Global Crossing POPs set out on the attached Network Interconnection Schedule. Global Crossing may add or delete a POP at any
time upon written notice. At Ciera's written request, and with Global Crossing's written approval, Ciera may interconnect its dedicated circuits from a Global Crossing POP to an End-User's
premise. Ciera is responsible for coordinating LEC installation of local loops necessary for these Services as well as installation and monthly recurring charges associated with dedicated circuits
necessary for these Services.

	2.
	At
Ciera's written request, Global Crossing may provide the premise equipment (the "Equipment") to End-Users that need the
same to access these Services. Global Crossing will install and maintain the Equipment. End-Users must sign an Equipment Agreement with Global Crossing in the format supplied or approved
by Global Crossing. Ciera shall bear the risk of loss of the Equipment if the Equipment is not returned to Global Crossing in good working condition, normal wear and tear excepted.

	3.
	For
the NOS Dedicated Outbound Services (domestic and international), Ciera shall pay the rates set out in the attached pricing schedules.

	4.
	Each
DS-1 circuit interconnecting Ciera or an End-User to a Global Crossing POP has a monthly minimum usage requirement of * minutes. If a circuit experiences a
minimum shortfall * Billing Cycles, Global Crossing may provide Ciera with written notice of such fact and of Global Crossing's intent to disconnect the under-minimum circuit if the minimum is not
attained by the Billing Cycle commencing after the date the notice is received. Ciera shall reimburse Global Crossing for any termination fees or charges paid by Global Crossing to the circuit
provider for early disconnection of such circuit. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

 
Exhibit I(a)

Page 1 of 2  

 
 

National Origination Service (NOS)
  Dedicated Out-Bound Service    
  

	*
	2
Pages 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

3

  

Exhibit J

Page 1 of 1  

  
 

    National Origination Service (NOS)
  Switched Outbound
  International Services Schedule    
  

	*
	

	1.
	For
NOS Switched Outbound International Services, Ciera shall pay the international rates set out in the attached pricing schedules.

	2.
	For
International Directory Assistance Services, if available, Ciera shall pay the applicable standard Global Crossing resale rates in effect when calls are made. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

 
Exhibit J(a)

Page 1 of 6  

 
 

National Origination Service (NOS)
  Switched International Service    
  

	*
	6
Pages 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

3

  

Exhibit K

Page 1 of 1  

 
 

National Origination Service (NOS)
  Dedicated Outbound
  International Services Schedule    
  

	*
	

	1.
	For
NOS Dedicated Outbound International Services, Ciera shall pay the international rates set out in the attached pricing schedules.

	2.
	For
International Directory Assistance Services, if available, Ciera shall pay the applicable standard Global Crossing resale rates in effect when calls are made. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

 
Exhibit K(a)

Page 1 of 6  

 
 

National Origination Service (NOS)
  Dedicated International Service    
  

	*
	6
Pages 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

3

  

Exhibit L

Page 1 of 3  

 
 

CIC Transport Schedule    
  

	*
	

	A.
	General Terms for CIC Translation.

	1.
	Ciera
has elected to have its carrier identification code ("CIC") directed to Global Crossing Feature Group D (FG-D)
circuits in Global Crossing approved LATAs and associated tandem switches ("CIC Translation") in order to receive CIC Transport services from Global
Crossing. "CIC Transport" is a transport service where Ciera's switched outbound traffic originating in an area where its CIC has been translated to the
Global Crossing network is routed by Global Crossing over dedicated facilities to Ciera's switch for termination.

	2.
	For
each LEC region in which Ciera desires to implement a CIC Translation, Ciera shall provide Global Crossing with the State, LATA, tandem CLLI, End Office CLLI and OCN. In addition,
Ciera will provide Global Crossing with a minute-of-use traffic forecast for the LATA and tandem in accordance with the forecast requirements under the Agreement. Global
Crossing may approve or decline implementation of a CIC Translation at its sole discretion.

	3.
	If
a CIC Translation is approved, Global Crossing's Provisioning Department will process Ciera's Access Service Requests (ASR) with the LEC for * per ASR per tandem per LEC. Ciera is
responsible for providing Global Crossing with the appropriate forms and information required for CIC Translation, including, but not limited to, Shared Service Agreement and Letter of Agency. Global
Crossing assumes no liability for any LEC errors with respect to implementation of an ASR or a CIC Translation. Ciera shall not process ASRs for a CIC Translation directly with a LEC without Global
Crossing's prior written consent. Unless otherwise agreed in writing by Global Crossing, Ciera shall be responsible, at its sole expense, for all ordering of, and charges for, dedicated facilities and
equipment required to maintain access, interconnection and interface with Global Crossing's equipment and network.

	4.
	For
a period of two years following implementation of Ciera's initial CIC Translation, Global Crossing will be the Ciera's primary network provider for each LATA/tandem in which a CIC
Translation is implemented. If Ciera redirects its CIC from an implemented LATA/tandem to another primary network provider or to its own private lines during such two year period, Ciera shall pay
Global Crossing a termination fee equal to the amount of Ciera's highest monthly usage of the Switched Services in such LATA/tandem times the number of months remaining on the two year period. If the
Agreement is terminated by Global Crossing prior to expiration of such two year period for Ciera's breach, the termination fee applies. If the Agreement is terminated by Ciera prior to expiration of
the two year period for Global Crossing's breach, the termination fee does not apply.

	5.
	At
such time after the above two year period has expired that Ciera wishes to disconnect a CIC Translation, Ciera shall provide Global Crossing with (i) the appropriate formal
disconnect documents ordered from each LEC tandem in which the CIC was originally provisioned, (ii) provide Global Crossing with any additional paperwork (i.e. LOA) required for the CIC
disconnect and (iii) remain liable for all LEC charges related to a CIC Translation until its disconnection by the LEC. Global Crossing's provisioning Department will process Ciera's disconnect
ASR 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

 

Exhibit L

Page 2 of 3  

with
the appropriate LEC for * per ASR per tandem per LEC. If Ciera elects to handle the CIC disconnect process, Global Crossing will provide Ciera with a letter of agency authorizing Ciera to have
the appropriate LEC disconnect Ciera's CIC from routing to Global Crossing's FG-D circuits. In either event, Ciera is responsible for any LEC disconnect charges. 

	B.
	Terms for CIC Transport Services

	1.
	"Total Transport" means that Global Crossing will transport all of Ciera's 1+, 011 (IDDD), 0+/)-/0+IDDD and 700 dialed calls originating
on Global Crossing's network to Ciera's switch(es).

	2.
	"Selective Transport" means that Global Crossing will transport only one or more (but not all) of Ciera's pre-selected 1+,
011 (IDDD) 0+/0-/0+ IDDD and 700 call types to Ciera's switch(es). The 011 Transport option does not include off-shore, Canadian or Caribbean destinations that are within the
North American Dial Plan. 011 Transport will deliver calls dialed with "011" prefix only to Ciera's switch.

	3.
	A
dedicated facility will be established between Global Crossing's switches and Ciera's switch(es) to deliver CIC Transport traffic. If traffic will be returned by Ciera to Global
Crossing for termination, separate outbound and inbound trunk groups shall be established. The inbound trunk group returning traffic to Global Crossing shall be provisioned as an IMT (intermachine
trunk) so that CIC Transport will not be invoked.

	4.
	Where
available and not already ordered, Global Crossing will order the CIP feature (Carrier Identification Parameter) for the LEC end offices where Ciera's CIC will be translated.
Where CIP has been ordered, Ciera's CIC will be supplied in the SS7 message and Ciera's traffic will be routed from Global Crossing's switches to Ciera's switch. Where CIP is not available, Ciera's
ANIs will be downloaded into Global Crossing's switch for routing calls to Ciera's switch.

	5.
	The
CIP feature is required for routing 700 traffic. 700 traffic originating from non-CIP areas will not be transported to Ciera' s switch, even if its ANIs have been
downloaded into Global Crossing's switch. Calls from non-CIP areas will be routed under Global Crossing's normal routing procedures.

	6.
	The
following restrictions apply to CIC Transport.

	A.
	Ciera's
End-Users must be Presubscribed to Ciera's CIC that has been translated to the Global Crossing network.

	B.
	Ciera
shall not market casual dialing (10-1X-XXX) without prior written authorization from Global Crossing and execution of an amendment to the Agreement for
Casual Resale Services.

	C.
	Account
Codes are not available.

	D.
	ANI
Screening is not available in conjunction with CIC Billing options. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

3

 

Exhibit L

Page 3 of 3  

	7.
	Ciera's
traffic will be routed to Ciera's switch without prescreening the ANI. All calls will be routed to Ciera's switch for call treatment, even if the ANI is blocked in the Global
Crossing switch. Upon Ciera's request and when approved and available by Global Crossing, Global Crossing will provide ANI Screening on CIC Transport traffic. ANI Screening permits the switch to
determine if an ANI is in an allowed or blocked status. ANI's that Ciera has blocked will not be routed to Ciera's switch.

	8.
	CIC
Transport is billed via a bundled arrangement where LEC originating access charges are paid by Global Crossing. "Originating access charges" include all charges levied by a LEC for
Ciera's switched access to Global Crossing's serving POPs, including but not limited to, Tandem Switch Transport, Tandem Switching and Residual Interconnection (RIC) charges. Unbundled billing
arrangements, where LEC originating access charges are billed directly to and paid by Ciera, are not available with CIC Transport.

	9.
	Ciera
will be charged for CIC Transport traffic at the applicable rates set out on the attached pricing schedules. Ciera understands that during the initial implementation of the CIC
Transport service it may be billed at standard Switched Services rates, attached as Exhibit G(a), rather than the attached rates for up to a period of five Business Days and agrees to pay such
standard rates during such period.

	10.
	Each
DS-1circuit interconnecting Ciera to a Global Crossing POP shall have a monthly minimum usage requirement of * minutes. If a DS-1circuit experiences a
minimum shortfall over two consecutive Billing Cycles, Global Crossing may provide Ciera with written notice of such fact and of Global Crossing's intent to disconnect the under-minimum circuit if the
minimum is not attained by the Billing Cycle commencing after the date the notice is received. Ciera shall reimburse Global Crossing for any termination fees or charges paid by Global Crossing to the
circuit provider for early disconnection of such circuit.

	11.
	Any
CIC Transport traffic that Ciera terminates on the Global Crossing network shall utilize Ciera's Carrier Domestic Termination Service and Carrier Termination International Service
rates. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

4

 

Exhibit L(a)

Page 1 of 5  

 
 

CIC Transport Service    
  

INTERSTATE 

	*
	5
Pages 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

5

 
Exhibit L(b)

Page 1 of 5  

 
 

CIC Transport Service    
  

INTRASTATE

	*
	5
Pages 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

6

  

Exhibit M

Page 1 of 5  

 
 

COLOCATION SERVICES    
  

        All Colocation facilities are pending Global Crossing's Engineering approval based upon the information provided to Global Crossing by Ciera in the Colocation
Service Inquiry Form. Any approved facilities shall be presented to Ciera as an amendment pursuant to Section 1.A. below. 

	1.
	LICENSE:

	A.
	Global
Crossing hereby grants Ciera a license to occupy certain designated space (the "Space") within a designated Global Crossing premise (the "Facility"). Separate "Colocation
Schedules" may be attached hereto from time to time for each separate site where Colocation will be established. All Colocation Schedules, upon their execution by both Parties, shall be incorporated
herein and shall become a part hereof. By executing a Colocation Schedule, Ciera accepts the Space on an "AS-IS, WHERE IS" basis. Ciera may only use the Space to install, maintain,
monitor, operate, replace, repair and remove certain of its telecommunications equipment (the "Equipment") as specified on the Colocation Schedule.

	B.
	Ciera
acknowledges that it has been granted only a license to occupy the Space and that it has no real property interests therein. Ciera shall not utilize the Facility for any unlawful
purposes, assign, mortgage, sublease, encumber or otherwise transfer any Space or license granted hereunder. Any attempt by Ciera to encumber the Space or permit the use or occupancy by anyone other
than Ciera shall be void.

	C.
	Ciera
shall utilize the Space and the Equipment only in conjunction with services provided by Global Crossing. Use of the Space or Equipment with third party services or for
interconnection to third
parties is prohibited. Any party seeking to install any such facility or connection without the express written authorization of Global Crossing shall be denied entry to the Space. 

	2.
	TERM AND TERMINATION:

	A.
	The
term of a license shall be as set forth in the applicable Colocation Schedule and shall commence on the first day the Space is made available by Global Crossing (the "Commencement
Date"), but shall be immediately terminable by Global Crossing upon the termination, expiration or cancellation for any reason of (i) any underlying agreement between Global Crossing and any
other party involving Global Crossing's continued use of the Facility, or (ii) this Agreement. Following the expiration of the license term as set forth in the Colocation Schedule for a Space,
Ciera's license shall automatically renew on a month to month basis in accordance with the same terms and conditions specified herein, unless terminated by either Ciera or Global Crossing upon
120 days prior written notice. 

	*
	CERTAIN
INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS. 

2

 
Exhibit M

Page 2 of 5  

	B.
	Global
Crossing shall not be liable to Ciera in any way as a result of Global Crossing's failure (for any reason) to tender possession of the Space to Ciera on or before the
commencement date listed in the Colocation Schedule. Any delay in tendering possession of the Space to Ciera for any reason other than the acts or omissions of Ciera shall relieve Ciera of its
obligation to pay the monthly recurring charges (MRC) set forth in the Colocation Schedule until possession of the Space is delivered to Ciera. 

	3.
	CHARGES, FEES and TAXES:

	A.
	MRCs
shall be payable in advance and without notice or demand and without abatement, deduction, counterclaim or setoff commencing on the first day the Space is made available by Global
Crossing and
on the first day of each calendar month thereafter. Installation and non-recurring charges are due when invoiced. MRCs shall be prorated for partial months. The MRCs may be increased from
time to time during the term of the license by reason of (i) any increases payable by Global Crossing to its landlord(s) under the lease for the Facility or Rights of Way in which the Space is
located; (ii) any increases incurred by Global Crossing in any of the services to the Facility procured by Global Crossing directly from the provider thereof; and (iii) any increases in
real property taxes assessed against the Facility which Global Crossing is liable to pay. Ciera's share of any such increases shall be pro-rated based on the number of innerduct linear
feet in the Space as a percentage of the total number of innerduct linear feet in the Facility.

	B.
	In
addition, Ciera shall be fully responsible for the prompt payment of all federal, state or local taxes, however denominated, based on or calculated with respect to the amounts
payable by Ciera (including but not limited to sales/use, rental and gross receipts taxes or surcharges) and all taxes (including, but not limited to franchise, income and miscellaneous taxes) which
are the liabilities of Ciera under (i) appropriate standard industry practices (including telecommunications, fiber optic and rental industries), (ii) applicable law and (iii) as
otherwise agreed at any time between Ciera and Global Crossing; provided, however, the taxes on Global Crossing's income and property shall be the sole responsibility of Global Crossing. 

	4.
	MAKE-READY:

        If
applicable, Ciera shall pay Global Crossing the amount set forth in each Colocation Schedule for the cost of engineering or improvements to the Space required to be made by Global
Crossing in order to accommodate Ciera's Colocation into the Space (the "Make-Ready Fee"). The Make-Ready Fee shall be payable to Global Crossing upon Ciera's execution of the
Colocation Schedule for the Space. Title to such improvements shall remain vested in Global Crossing. 

	*
	CERTAIN
INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS. 

3

 
Exhibit M

Page 3 of 5  

	5.
	MAINTENANCE:

	A.
	Global
Crossing shall be responsible for maintenance of the Facility and the Space. Ciera shall not make any alterations, changes, additions or improvements to either the Facility or
the Space without Global Crossing's prior written consent. Ciera agrees to maintain and repair all of its Equipment placed in the Space at Ciera's expense and shall be responsible for all costs
associated with the configuration, installation, interconnection and operation of the Equipment, including without limitation, transportation related costs and any electrical or other work which must
be completed in order to interconnect the Equipment.

	B.
	Ciera's
Maintenance responsibilities include, but are not limited to, the following:

	(i)
	Ciera
shall arrange for the transit delivery of all Equipment to the Space at its sole cost and expense.

	(ii)
	Ciera
shall provide Global Crossing with reasonable prior notice (not less than two (2) business days) of the actual delivery date of the
Equipment.

	(iii)
	Ciera
shall not cause harm to the Space or the Facility of Global Crossing, or third parties.

	(iv)
	Ciera
shall not interfere in any way with Global Crossing's use or operation of the Facility or with the use or operation of any third party
facilities.

	(v)
	Ciera
shall not physically conflict or electrically interfere with the facilities of Global Crossing or third parties.

	(vi)
	Ciera
shall be in full compliance with telecommunication industry standards, NEC and OSHA requirements, and in accordance with Global Crossing's
requirements and specifications.

	(vii)
	All
Equipment must be mounted on racks, and using appropriate brackets, except where otherwise expressly permitted in writing by Global Crossing.
Ciera is solely responsible for assuring that the Equipment is mounted in an efficient and appropriate manner.

	(viii)
	All
cabling regardless of location, shall be tied and organized, run to the side of the rack, and labeled. Connectors must be secured in the
interface socket.

	(ix)
	Ciera
must provide for remote access (via modem or other means) where available, in order to administer, configure, monitor and operate the Equipment.

	(x)
	Ciera
shall, at all times, comply with Global Crossing's rules and regulations regarding access to its facilities, including without limitation,
adequate notice before entry (not less than one business day), appropriate dress and professional conduct. Global Crossing may remove any personnel of Ciera not in compliance with its rules and
regulations and may prohibit access by any person at its discretion. 

	*
	CERTAIN
INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS. 

4

 
Exhibit M

Page 4 of 5  

	(xi)
	Ciera
shall utilize only Global Crossing's facilities and Global Crossing's network for a minimum of fifty per cent (50%) of its provision of its
services, and facilities of third parties or connections to third party facilities are prohibited. Any party seeking to install any such facility or connection without the express written
authorization of Global Crossing shall be denied entry to the Space. Ciera, however, may employ non-Global Crossing services only when such services are not offered by Global Crossing. 

	6.
	APPROVALS:

	A.
	Ciera
shall submit to Global Crossing all building construction and electrical requirements and architectural and engineering drawings indicating the proposed installation for
approval. Ciera may not perform any construction or install any Equipment without written approval from Global Crossing. Global Crossing reserves the right to accept or reject Ciera's design at its
sole discretion. All costs of
design work shall be Ciera's responsibility. Ciera shall also be required to complete the Colocation Request For Information form.

	B.
	Global
Crossing shall inspect the completed installation and must approve the same in writing before Ciera is allowed to utilize the Equipment for any reason. Any installations that do
not comply with the approved drawings will be subject to rejection by Global Crossing. Global Crossing also reserves the right to order reasonable modifications to any installations.

	C.
	Ciera
is solely responsible for obtaining any and all necessary building permits or other authorizations required for Colocation of its Equipment. 

	7.
	INSURANCE and INDEMNITY:

	A.
	While
a license is in effect, Ciera shall maintain in force and effect policies of insurance as follows:

	(i)
	Comprehensive
General Liability Insurance, including contractual liability and broad form property damage, covering personal injury or death and
property damage with a combined single limit of at least $1 million; and

	(ii)
	Workers
Compensation Insurance with limits required by the laws of the state in which the Space is located. 

        The
liability insurance shall name Global Crossing as an additional insured and shall be primary insurance and Global Crossing's insurance shall not be called upon for contribution
towards any such loss. Ciera's insurer shall provide Global Crossing with a least ten (10) days prior written notice of cancellation or change in coverage. All insurance required of Ciera shall
be evidenced by certificates of insurance provided to Global Crossing. 

	B.
	Ciera
shall be liable for and shall indemnify, defend and hold Global Crossing harmless from and against any claims, demands, actions, damages, liability, judgments, expenses and costs
(including reasonable attorneys fees) arising from (i) Ciera's use of the Space, or (ii) any damage or destruction thereto or to the Facility or any property therein caused by or due to
(x) the acts or failures to act, negligent, willful or otherwise, of Ciera, its employees, agents or representatives, or (y) any malfunction of Ciera's Equipment located in the Space. 

	*
	CERTAIN
INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS. 

5

 
Exhibit M

Page 5 of 5  

	C.
	Global
Crossing does not warrant that the integrity of the Space or the Facility will be free from any disruptions and Global Crossing shall not be liable therefore. Global Crossing's
entire liability for any such disruptions, or any other matter giving rise to a claim with respect to the Space or Facility, shall not exceed in any case the MRCs paid by Ciera for the month in which
such disruption or other matter occurred. 

	8.
	DAMAGE TO FACILITY: If the Facility in which the Space is located is damaged by fire or other casualty, Global Crossing shall give
immediate notice to Ciera of such damage. If Global Crossing's landlord or Global Crossing exercises an option to terminate the lease therefor due to such damage or Global Crossing's landlord or
Global Crossing decides not to rebuild the Facility in which the Space is located, this Agreement shall terminate as of the date of such exercise or decision as to the affected Space and the MRC paid
by Ciera shall be modified accordingly. If neither the landlord of the affected Facility nor Global Crossing exercises the right to terminate or not to rebuild, the landlord or Global Crossing, as
applicable, shall repair the Facility to substantially the same condition as prior to the damage, completing the same with reasonable speed. In the event that such repairs are not completed within a
reasonable time, Ciera shall thereupon have the option to terminate this Agreement with respect to the affected Space, such option shall be the sole remedy available to Ciera against Global Crossing
hereunder relating to such failure. If the Space or any portion thereof shall be rendered unusable by Ciera by reason of such damage, the MRC for such Space shall proportionately abate for the period
from the date of such damage to the date when such damage shall have been repaired for the portion of the Space rendered unusable.

	9.
	RATES AND CHARGES: Ciera shall be charged for Colocation Space at the rates set out below. 

Monthly Recurring Charges:

*  

Non Recurring Charges:

*  

	*
	CERTAIN
INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS. 

6

 
Exhibit M(a)

Page 1 of 1  

 
 

Colocation Schedule #1
  Equipment, Space and Power Requirements    
  

Customer
Name:    Ciera 

	Global Crossing Switch Site Location:	 	1100 Main Street

Suite M-16

Kansas City, Missouri

212-618-9999

Minimum
Term:    One Year Term 

Commencement
Date:    Upon execution of this Agreement by Global Crossing. 

	*
	CERTAIN
INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS. 

7

  

Exhibit N

Page 1 of 6  

 
 

Network Interconnection Schedule    
  

	*
	6
Pages 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

  

[Logo] Global Crossing®  

 
 

AMENDMENT #2 TO CARRIER SERVICE AGREEMENT
  
    Ciera Network System, Inc.
  
    February 6, 2002    
  

        This is Amendment #2 to the Carrier Service Agreement between Global Crossing Bandwidth, Inc. ("Global
Crossing") and Ciera Network Systems, Inc. ("Ciera Network" or  "Purchaser"), dated March 27, 2001, as amended (the
"Agreement"). 

	1.
	Except
as otherwise stated, capitalized terms used herein have the same meaning as set forth in the Agreement.

	2.
	Ciera
Network is requesting Global Crossing to provide AC Billing for Ciera Network's Clearing House account 0204448180 (Association ID: EOW2) and shall adhere to the terms and
coniditions as set forth below:

	a.
	*

	b.
	*

	(i)
	*

	(ii)
	*

	c.
	*

	d.
	* 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

2

 

	e.
	*

	3.
	*

	(i)
	*

	(ii)
	*

	(iii)
	*

	(iv)
	*

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

3

 

	4.
	*

	5.
	*

	6.
	The
balance of the Agreement and any executed amendments or addenda thereto not modified by this Amendment #2 shall remain in full force and effect.

	7.
	This
Amendment #2 is effective as of the date signed by Global Crossing below. 

	GLOBAL CROSSING BANDWIDTH, INC.	 	CIERA NETWORK SYSTEMS, INC.
	

By:	

/s/  GREGORY L. SPRAETZ      
 Gregory L. Spraetz, Vice President

North American Carrier Services	
 	

By:	

/s/  ROBERT W. LIVINGSTON      
 Robert W. Livingston, Chief Executive Officer

	

Date:	

2/25/02
	
 	

Date:	

2-7-2002

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

4

 
Amended Exhibit C

Page 1 of 1  

 
 

Global Crossing Access Direct
  Carrier Termination Schedule    
  

	*
	

	1.
	For
domestic and international traffic originating from Ciera's switch, Ciera shall pay the applicable rates set out in the attached pricing schedules.

	2.
	Each
DS-1 circuit interconnecting Ciera to one of the Global Crossing POPs set out in the attached Network Interconnections Schedule has a monthly minimum usage requirement
of * minutes. Global Crossing may add or delete a POP at any time upon written notice. If a circuit experiences a minimum shortfall * Billing Cycles, Global Crossing may provide Ciera with written
notice of such fact and of Global Crossing's intent to disconnect the under-minimum circuit if the minimum is not attained by the Billing Cycle commencing after the date the notice is received. Ciera
shall reimburse Global Crossing for any termination fees or charges paid by Global Crossing to the circuit provider for early disconnection of such circuit.

	3.
	Unless
otherwise agreed by Global Crossing in writing, Ciera shall be responsible, at its sole expense, for all ordering of, and charges for, dedicated facilities and equipment
required to maintain access. Interconnection and interface with Global Crossing's equipment and network.

	4.
	If
there is a change in Ciera's interstate/intrastate traffic profile which adversely impacts Global Crossing's rate structure, regardless of Ciera's PIU Certification, Global Crossing
reserves the right to revise the pricing schedule. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

5

 
Amended Exhibit D(a)

page 1 of 5  

 
 

Global Crossing Access DirectSM
  Carrier Domestic Trmination Service
  (Customer Specific)    
  

	*
	5
Pages 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

6

 
Amended Exhibit E

Page 1 of  

 
 

Global Crossing Access DirectSM
  Dedicated Carrier Termination
  International Services Schedule    
  

	*
	

	1.
	For
Global Crossing Access Direct Dedicated Carrier Termination International Services. Ciera shall pay the international rates set out in the attached pricing schedules.

	2.
	For
International Directory Assistance Services, if available, Ciera shall pay the applicable standard Global Crossing resate rates in affect when calls are made. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

7

 
Amended Exhibit E(a)

Page 1 of 6  

 
 

Global Crossing Access DirectSM
  Carrier Termination International Service    
  

	*
	6
Pages 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

8

 
Amended Exhibit F

Page 1 of 1  

 
 

Global Crossing Access DirectSM
  Carrier Toll Free Transport Schedule    
  

	*
	

	1.
	In
order to protect the integrity of its network, Global Crossing may, without liability, temporarily block any Toll-Free Number having usage surges. Global Crossing agrees
to use reasonable efforts to promptly notify Ciera after blockage has occurred.

	2.
	At
Ciera's written request and to the extent available to Global Crossing, Toll-Free Directory Assistance is available for Global Crossing Toll-Free Numbers
only. Due to the fact that Toll-Free Directory Assistance is provided through an arrangement with a third party, the provision of Toll-Free Directory Assistance by Global
Crossing is subject to the policies and procedures promulgated from time to time by such third party. Ciera understands that any Global Crossing Toll-Free Number listed with
Toll-Free Directory Assistance is no published in any written directory, but is only available on a call-in basis.

	3.
	The
transfer of Toll-Free Numbers to another carrier is subject to the Guidelines and the Global Crossing policies and procedures for Toll-Free number/traffic
transfers in effect at the time of the requested transfer.

	4.
	Ciera
acknowledges and agrees that call records detail (CDR) for Toll-Free Carrier Transport it receives from Global Crossing may not match billable CDR's from Ciera's
switch as Global Crossing bills Ciera for all calls completed to their switch at Time point 7 minus Time point ???, (regardless of whether the call is completed to the called party).

	5.
	For
Access Direct Carrier Toll-Free Transport traffic, Ciera shall pay the rates set out in the attached pricing schedules.

	6.
	If
there is a change in Ciera's interstate/intrastate traffic profile which adversely impacts Global Crossings rate structure, regardless of Ciera's PIU Certification. Global Crossing
reserves the right to revise the pricing schedule. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

9

 
Amended Exhibit F

Page 1 of 6  

 
 

Global Crossing Access DirectSM
  Carrier Toll Free Transport Service
  (Customer Specific)    
  

	*
	6
Pages 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

10

 
Amended Exhibit L

Page 1 of 2  

 
 

Global Crossing Access DirectSM
  Pseudo-CIC Transport Schedule    
  

	*
	

 
 

Terms for Pseudo-CIC Transport Services    
  

	1.
	"Pseudo-CIC
Transport" is a transport service where Ciera's switched outbound traffic has originated on Global Crossing's network and is routed by Global Crossing over
dedicated facilities to Ciera's switch for termination. Ciera's end-users are presubscribed to Global Crossing's CIC.

	2.
	"Total
Transport" means that Global Crossing will transport all of Ciera's 1+, 011 (IDDD), 0+/0-/0+IDDD dialed calls originating on Global Crossing's network to Ciera's
switch(es).

	3.
	"Selective
Transport" means that Global Crossing will transport only one or more (but not all) of Ciera's pre-selected 1+, 011 (IDDD), 0+/0-/0+IDDD call types
to Ciera's switch(es).

	4.
	Transport
of 700-dialed calls is not available with Pseudo CIC Transport.

	5.
	Under
"Selective Transport", the 011 Transport option does not include offshore, Canadian or Caribbean destinations that are within the North American Dial Plan. 011 transport will
deliver calls dialed with "011" prefix only to Ciera's switch.

	6.
	Global
Crossing will assign a unique Pseudo CIC to Ciera's account. The assigned Pseudo CIC is for Global Crossing internal routing purposes only and is not associated with or
recognized as an industry standard Carrier identification Codes issued by Lockheed Martin.

	7.
	Ciera's
ANIs will be downloaded into Global Crossing's switch with the assigned Pseudo CIC for routing calls to Ciera's switch.

	8.
	A
dedicated facility will be established between Global Crossing's switches and Ciera's switch(es) to deliver Pseudo-CIC Transport traffic. If Ciera will return traffic to
Global Crossing for termination, separate outbound and inbound trunk groups shall be established. The inbound trunk group returning traffic to Global Crossing shall be provisioned as an IMT
(intermachine trunk) so that routing back to Ciera's switch will not be invoked.

	9.
	The
following restrictions apply to Pseudo-CIC Transport. 

Ciera's
End-Users must be Presubscribed to Global Crossing's CIC Code 444. 

Ciera
shall not market casual dialing (10-1X-XXX) using the Pseudo CIC 

Ciera
shall not market casual dialing (10-1X-XXX) using Global Crossing's CIC. 444 

Account
Codes are not available. 

CIC
based billing is not available. Pseudo CIC-Transport Service must be billed by ANI. 

	10.
	Global
Crossing will perform ANI Screening on all Pseudo-CIC Transport traffic. ANI Screening permits the switch to determine if on ANI is in an allowed or blocked status.
ANIs that Ciera has blocked will not be routed to Ciera's switch. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

11

 
Amended Exhibit L

Page 2 of 2  

	11.
	Ciera
will be charged for Pseudo-CIC Transport traffic at the applicable rates set out on the attached pricing schedules. Ciera understands that during the initial
implementation of the Pseudo-CIC Transport service it may be billed at standard Switched Services rates rather than the attached rates for up to a period of five Business Days and agrees
to pay such standard rates during such period.

	12.
	Each
DS-1 circuit interconnecting Ciera to a Global Crossing POP shall have a monthly minimum usage requirement of * minutes. If a DS-1 circuit experiences a
minimum shortfall * Billing Cycles, Global Crossing may provide Ciera with written notice of such fact and of Global Crossing's intent to disconnect the under-minimum circuit if the minimum is not
attached by the Billing Cycle commencing after the date the notice is received. Ciera shall reimburse Global Crossing for any termination fees or charges paid by Global Crossing to the circuit
provider to early disconnection of such circuit.

	13.
	Any
CIC Transport that Ciera terminates on the Global Crossings network shall utilize Ciera's Carrier Domestic Termination Service and Carrier Termination International Services
rates. 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

12

 
Amended Exhibit L(b)

Page 1 of 5  

 
 

Global Crossing Access DirectSM
  Pseudo-CIC Transport Service
  (Customer Specific)    
  

	*
	5
Pages 

INTRASTATE 

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

13

 
Amended Exhibit L(a)

Page 1 of 5  

 
 

Global Crossing Access DirectSM
  Pseudo-CIC Transport Service
  (Customer Specific)    
  

	*
	5
Pages 

INTERSTATE

*
 CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

14

QuickLinks

CARRIER SERVICE AGREEMENT BETWEEN GLOBAL CROSSING BANDWIDTH, INC. AND CIERA NETWORK SYSTEMS, INC.

TABLE OF CONTENTS

CARRIER SERVICES AGREEMENT

PURPOSE

DEFINITIONS (not otherwise defined in the body of the Agreement or an Exhibit)

Schedule of Ancillary Fees

Schedule of Ancillary Fees

Schedule of Ancillary Fees For Toll-Free Services Automated Feature Provisioning (AFP) Schedule

Definitions

Ciera Provisioned Pricing

Global Crossing's Provisioned Pricing

Call Detail Records; Electronic Data Exchange Letter of Agency Requirements

Call Detail Records; Electronic Data Exchange Letter of Agency Requirements

Carrier Termination Schedule

Gateway Carrier Service LATA Gateway Table

Carrier Domestic Termination Service

Carrier Termination International Services Schedule

Carrier Termination International Service

Carrier Toll-Free Transport Schedule

Carrier Toll Free Transport Service

National Origination Service (NOS) Switched Outbound Services Schedule

National Origination Service (NOS) Switched Out-Bound Service

National Origination Service (NOS) Switched & Dedicated Toll-Free Services Schedule

National Origination Service Switched Toll Free Service

National Origination Service (NOS) Dedicated Outbound Services Schedule

National Origination Service (NOS) Dedicated Out-Bound Service

National Origination Service (NOS) Switched Outbound International Services Schedule

National Origination Service (NOS) Switched International Service

National Origination Service (NOS) Dedicated Outbound International Services Schedule

National Origination Service (NOS) Dedicated International Service

CIC Transport Schedule

CIC Transport Service

CIC Transport Service

COLOCATION SERVICES

Colocation Schedule #1 Equipment, Space and Power Requirements

Network Interconnection Schedule

AMENDMENT #2 TO CARRIER SERVICE AGREEMENT Ciera Network System, Inc. February 6, 2002

Global Crossing Access Direct Carrier Termination Schedule

Global Crossing Access DirectSM Carrier Domestic Trmination Service (Customer Specific)

Global Crossing Access DirectSM Dedicated Carrier Termination International Services Schedule

Global Crossing Access DirectSM Carrier Termination International Service

Global Crossing Access DirectSM Carrier Toll Free Transport Schedule

Global Crossing Access DirectSM Carrier Toll Free Transport Service (Customer Specific)

Global Crossing Access DirectSM Pseudo-CIC Transport Schedule

Terms for Pseudo-CIC Transport Services

Global Crossing Access DirectSM Pseudo-CIC Transport Service (Customer Specific)

Global Crossing Access DirectSM Pseudo-CIC Transport Service (Customer Specific)

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00038-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00038-of-00352.parquet"}]]