Document:

<PAGE>

                                                                   EXHIBIT 10.48

CONFIDENTIAL PORTION MARKED [*************] HAS BEEN OMITTED PURSUANT TO A
REQUEST FOR CONFIDENTIAL TREATMENT AND FILED SEPARATELY WITH THE SECURITIES
AND EXCHANGE COMMISSION.

                              FIBER LEASE AGREEMENT

                              dated April 26, 2002

                                     between

                          Williams Communications, LLC

                                       and

                     Metromedia Fiber National Network, Inc.

<PAGE>

                               TABLE OF CONTENTS

<Table>
<S>            <C>                                                         <C>
   ARTICLE 1.  Definitions....................................................1
   ARTICLE 2.  TERMINATION OF FIBER LEASE.....................................3
   ARTICLE 3.  GRANT OF LEASE AND BACKBONE ACCESS.............................3
   ARTICLE 4.  CONSIDERATION; FEES............................................4
   ARTICLE 5.  DELIVERY AND ACCEPTANCE........................................5
   ARTICLE 6.  COLLOCATION AND MAINTENANCE....................................8
   ARTICLE 7.  AUTHORIZATIONS.................................................8
   ARTICLE 8.  Intentionally Omitted..........................................9
   ARTICLE 9.  INTERCONNECTION OF LESSEE'S SYSTEM.............................9
   ARTICLE 10. USE OF THE LESSEE FIBER.......................................11
   ARTICLE 11. PAYMENT TERMS.................................................11
   ARTICLE 12. INDEMNIFICATION...............................................12
   ARTICLE 13. INSURANCE.....................................................12
   ARTICLE 14. Taxes and Franchise, License and Permit Fees..................13
   ARTICLE 15. Notice........................................................14
   ARTICLE 16. Confidentiality and Publicity.................................15
   ARTICLE 17. DEFAULT.......................................................16
   ARTICLE 18. FORCE MAJEURE.................................................17
   ARTICLE 19. ARBITRATION...................................................18
   ARTICLE 20. ASSIGNMENT....................................................18
   ARTICLE 21. RULES OF CONSTRUCTION.........................................19
   ARTICLE 22. Representations and Warranties................................21
   ARTICLE 23. LIMITATION OF LIABILITY.......................................22
   ARTICLE 24. AUDIT RIGHTS..................................................23
   ARTICLE 25. IMPROPER PAYMENTS PROHIBITED..................................23
   ARTICLE 26. ENTIRE AGREEMENT; AMENDMENT; EXECUTION........................23
</Table>

EXHIBITS:

Exhibit A         Fiber Testing Specifications
Exhibit B         Lessee Fiber and Maps
Exhibit C         Buildings
Exhibit D         Form of As-Builts
Exhibit E         Construction Specifications

                                        i

<PAGE>

                                 LEASE AGREEMENT

         THIS LEASE AGREEMENT (this "Agreement") is made as of the 26 day of
April, 2002, (the "Effective Date") by and between WILLIAMS COMMUNICATIONS, LLC,
a Delaware limited liability company ("Williams Communications") and METROMEDIA
FIBER NATIONAL NETWORK, INC., a Delaware corporation ("Lessee").

         BACKGROUND

A. Williams Communications owns or controls interstate fiber optic communication
systems located in the continental United States (the "Williams Communications
System");

B. Williams Communications desires to grant to Lessee a lease ("Lease") in
certain optical fibers in the Williams Communications System and Lessee desires
to accept a Lease in such fibers, all upon the terms and conditions set forth in
this Agreement.

         TERMS OF AGREEMENT

Accordingly, in consideration of the mutual promises set forth below and other
good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereby agree as follows:

ARTICLE 1. DEFINITIONS

The following terms shall have the stated definitions in this Agreement.

"ACCEPTANCE DATE" means the date when Lessee delivers (or is deemed to have
delivered) a notice of acceptance with respect to each delivery of Lessee Fiber
as further described in Section 5.3.

"AFFILIATE" means, with respect to any entity, an entity controlling, controlled
by, or under common control with such entity by means of direct or indirect
equity ownership or otherwise. As used in this Agreement, "control" shall mean
possession, directly or indirectly, of the power to direct or cause the
direction of the management and policies of a person or entity, whether through
the ownership of voting securities, by contract or otherwise.

"BACKBONE ACCESS" shall have the meaning set forth in Section 3.4.

"BACKBONE ACCESS CHARGES" shall have the meaning set forth in Section 4.2.

"BUILDING" means any transmission site, regeneration site, or point-of-presence
("POP").

"CONFIDENTIAL INFORMATION" shall have the meaning set forth in Section 16.1.

                                       1
<PAGE>

"COSTS" means actual and directly related costs accumulated in accordance with
the established accounting procedure used by Williams Communications or Lessee
or their respective contractors or subcontractors, as the case may be, which
costs include the following: (a) labor costs, including wages, salaries,
benefits and overhead allocable to such labor costs (Lessee's or Williams
Communications' overhead allocation percentage shall not exceed the lesser of
(i) the percentage such party allocates to its internal projects or (ii) one
hundred and thirty percent (130%), and (b) other direct costs and out-of-pocket
expenses on a pass-through basis (e.g., equipment, materials, supplies, contract
services, etc.).

"DELIVERY DATE" means each date Williams Communications delivers or previously
delivered Lessee Fiber to Lessee, including all test deliverables.

"DEMARCATION POINT" means the point where Williams Communications's
installation, maintenance and operation obligations terminate as further
described in Article 9.

"DIVERSITY" means the provision of physically separated optical facilities that,
when equipped with suitable optronics, are capable of providing an alternate
transmission path without human or mechanical intervention. The alternate
facilities shall, except at each Demarcation Point, have at least thirty (30)
feet of separation in any direction and shall not be on the same poles, towers,
river crossings, bridges, viaducts, elevated walkways, or similar structures.

"EQUIPMENT" means Lessee's electronic, optronic and power equipment necessary
for the operation of the Lessee Fiber.

"EXPIRATION DATE" shall have the meaning set forth in the definition of "Term"
below.

"FACILITY OWNERS/LENDERS" means any entity (other than Williams Communications):
(a) owning any portion of the System or any property or security interest
therein, (b) leasing to Williams Communications, or providing an Lease to
Williams Communications in, any portion of the System, or (c) that is a lender
(including any party holding legal title or a security interest in the Williams
Communications System as a lessor or a creditor) with respect to Williams
Communications or any Affiliates of Williams Communications.

"FIBER ACCEPTANCE TESTING" shall have the meaning set forth in Section 5.2(a).

"FIBER TESTING SPECIFICATIONS" are set forth in Exhibit A.

"LESSEE FIBER" shall have the meaning set forth in Section 3.1.

"RELEASED PARTY" means each of the following:

         (a) any Affiliates of the other party and any Facility Owners/Lenders;

         (b) any employee, officer, director, stockholder, partner, member, or
trustee of the other party or of its Affiliates or Facility Owners/Lenders; or

                                       2
<PAGE>

         (c) assignees of the entities included in the above subparagraphs (a)
or (b) and any employee, officer, director, stockholder, partner, member, or
trustee of such assignees.

"RIGHT-OF-WAY AUTHORIZATIONS" means any underlying agreements, easements,
permits, or licenses, by which Williams Communications obtains rights to perform
its obligations hereunder with respect to the Williams Communications System,
Buildings and Lessee Fiber from:

         (a) underlying owners of real or personal property, or right-of-way
         holders,

         (b) grantors of IRU or other rights or licenses with respect to all or
         a portion of its System,

         (c) parties granting duct usage and pole attachment rights, and

         (d) any governmental authority (including franchising agencies,
         environmental regulation agencies, and public utility commissions).

"SPLICE POINT" is defined in Section 9.1.

"TERM" begins on the Effective Date and expires 20 years after the latest
Acceptance Date (the "Expiration Date") under this Agreement.

ARTICLE 2. TERMINATION OF FIBER LEASE

This Agreement cancels and replaces the Fiber Lease Agreement dated September
16, 1999 between the parties covering the Williams Communications System,
including all amendments thereto (the "Fiber Lease"). Immediately upon the
Effective Date, the Fiber Lease is terminated and of no further force and
effect.

ARTICLE 3. GRANT OF LEASE AND BACKBONE ACCESS

3.1 LESSEE FIBER. Unless otherwise converted to an IRU pursuant to Section 3.6,
Williams Communications grants to Lessee a Lease in 27,000 fiber miles in the
MFN System (the "Lessee Fiber") for a period of 20 years beginning on the
Acceptance Date for each segment, which Lessee Fiber is identified by segment in
Exhibit B. To the extent the Acceptance Date for any Lessee Fiber has not
occurred as of the Effective Date, Williams Communications has the obligation to
design, engineer, install, and construct or acquire such Lessee Fiber. Unless
otherwise accepted by Lessee, all Lessee Fiber shall provide Diversity. Lessee
agrees to pay the fees set forth in Section 4.1 for the Lessee Fibers.

3.2 LEASE LIMITATIONS. The Lease granted to Lessee hereunder and any rights
granted by Lessee to third party users, are subject to all Right-of-Way
Authorizations applicable to the Williams Communications System and the
Buildings. Lessee will adhere to the requirements of all such Right-of-Way
Authorizations. The Lease of the Lessee Fiber hereunder does not convey

                                       3
<PAGE>

any legal title to any real or personal property, including the fibers, cable,
or the Williams Communications System. This Lease does not include any Equipment
used to transmit capacity over, or to "light," the Lessee Fiber.

3.3 BUILDING TERMINATION. Williams Communications is obligated to terminate the
Lessee Fiber at a Demarcation Point serving the Buildings listed in Exhibit C.
To the extent the Lessee Fiber does not terminate at the Buildings listed in
Exhibit C as of the Effective Date, Williams Communications has the obligation
to design, engineer, install, and construct or acquire fiber and terminate such
fiber at such Buildings. All such terminations established by Williams
Communications shall comply with the relevant Fiber Testing Specifications
(including the splice loss and optical fiber specifications) set forth in
Exhibit A and with relevant telecommunications industry practices.

3.4 BACKBONE ACCESS. Lessee may access the Lessee Fibers along the backbone of
the Williams Communications System at any Building or mutually agreed upon
Splice Point. Lessee agrees to pay the Backbone Access Payment set forth in
Section 4.2 for such Backbone Access.

3.5 CONVERSION TO IRU. At any time during the Term, upon the request of Lessee
and Lessee's payment to Williams Communications of the net present value of the
Lease Payments and Backbone Access Payments calculated based upon a mutually
agreed upon discount rate, Williams Communications shall grant to Lessee an
Indefeasible Right of Use to the Lessee Fibers and Backbone Access equal to the
remaining term of this Agreement.

ARTICLE 4. CONSIDERATION; FEES

4.1 LEASE PAYMENTS. Williams Communications represents that the fiber miles set
forth in Exhibit B, are either the actual fiber miles (calculated as the route
miles traversed by the Lessee Fiber multiplied by the number of Lessee Fibers on
the route) or a bona fide estimate thereof.

         (a) Except as set forth in the following subsection, Lessee shall make
monthly payments to Williams Communications in advance during the Term, in an
amount calculated as [*****] PER FIBER MILE PER MONTH ("Lease Payments") based
27,000 fiber miles set forth in Exhibit B, for a total lease payment of
[********] during the Term. Lease payments begin upon the Effective Date.

         (b) The parties agree that Lessee shall make monthly payments in the
amount of [***********] (80,140 fiber miles) up through and including the April
billing (for May service) which represents the monthly charge for 6 fibers along
the route of the Lessee Fiber (the "Penalty Fee"). Thereafter, Lessee shall only
be responsible for Lease Payments equal to the monthly charge for the Lessee
Fibers set forth in Exhibit B. The Penalty Fee is in exchange for the downsizing
of Lessee's commitment in the Fiber Lease to the commitment represented by this
Agreement.

4.2 BACKBONE ACCESS PAYMENTS. In exchange for Backbone Access, Lessee shall make
monthly payments to Williams Communications in advance ("Backbone Access
Payment").

                                       4
<PAGE>

         (a) The Backbone Access Payment is calculated as follows:

<Table>
<Caption>
               Total                             Price per
          Number of fibers                        fiber per
             terminated                        interconnection
          ----------------                     ---------------
<S>                                            <C>

                  [*]                               [****]
                  [*]                                [***]
                  [*]                                [***]
                  [**]                            [******]
                  [**]                            [******]
                  [**]                            [******]
                  [**]                            [******]
                  [**]                            [******]
                  [**]                            [******]
                  [**]                            [******]
                  [**]                            [******]
                  [**]                            [******]
                  [**]                            [******]
                  [**]                            [******]
                  [**]                            [******]
                  [**]                            [******]
                  [**]                            [******]
                  [**]                            [******]
                  [**]                            [******]
                  [**]                            [******]
                  [**]                            [******]
                  [**]                            [******]
                  [**]                            [******]
</Table>

4.3 PAYMENT TERMS. Building Access Payments and Lease Payments commence on the
first day of the month beginning with the month after the Acceptance Date of the
relevant Lessee Fiber and/or Building, except that the first payment shall
include payment from the Acceptance Date to the last day of the month during
which the Acceptance Date occurs, as well as payment for the first full month
after the Acceptance Date. Lessee shall continue making such payments through
the first day of the month in which the Expiration Date occurs, unless the
Agreement is terminated prior to the Expiration Date as herein provided. All
payments are payable in accordance with Article 11.

4.4 NO BACKBONE ACCESS PAYMENTS AT POPS. Williams Communications will not charge
a Backbone Access Payment for termination within Williams Communications POPs,
transmission sites or regeneration sites where Lessee is collocating with
Williams Communications, or at Lessee's POPs.

ARTICLE 5. DELIVERY AND ACCEPTANCE

5.1 DELIVERY. To the extent not already delivered by Williams Communications and
accepted by Lessee, Williams Communications will use commercially reasonable
efforts to deliver the Lessee Fiber and Buildings by the scheduled Delivery Date
for each stated in Exhibit B and Exhibit C, respectively. In the event Williams
Communications anticipates a failure to deliver

                                       5
<PAGE>

any of the Lessee Fiber or Buildings by the scheduled Delivery Date, the parties
will designate representatives to meet and review the status of the delivery. If
the scheduled Delivery Date for any segment of Lessee Fiber or a Building is in
fact delayed, such delay will be considered a triggering event for the accrual
of liquidated damages to the Lessee as follows:

         (a) Subject to subsections (b), (c) and (d) below, and provided the
delay is not caused in whole or in part by Lessee, Lessee is entitled to a
credit against monthly charges in an amount equal to [***] per fiber mile of the
segment of Lessee Fiber for which the Delivery Date is delayed per month until
such time as such segment is delivered, and a credit against monthly charges in
an amount equal to [******] per delayed Building per month until delivered
("Liquidated Damages");

         (b) Liquidated Damages for each segment of Lessee Fibers is limited to
50% of the present value of the total monthly charges payable based on [******]
per fiber mile (using a discount factor of [***]) associated with the fiber
miles for the delayed segment. As an example, if a segment consisting of [***]
fiber miles is delayed under the Agreement, the present value of monthly charges
for that segment is [***********], and the total maximum Liquidated Damages
payable to Lessee for the delayed segment, regardless of duration of delay is
[***********]. Partial months of delay will be credited on a daily pro-rated
basis;

         (c) Liquidated Damages for Lessee Fiber for all delays are limited to
[***] of the then-current monthly invoicing of [******] per fiber mile to
Lessee. As an example, if Williams Communications is currently billing Lessee
[********] per month, Lessee is entitled to a maximum of [********] per month in
Liquidated Damages, regardless of the number of delayed segments;

         (d) Lessee may terminate the Agreement with respect a delayed segment
of Lessee Fibers or a delayed Building upon 15 days prior written notice to
Williams Communications, unless and until delivery actually occurs. Upon
termination, Liquidated Damages will cease to accrue for the terminated segments
and/or Buildings, and Williams Communications has no further payment obligations
with respect to such segment.

The parties agree that the Liquidated Damages represent a reasonable estimate of
anticipated damages incurred by Lessee in the event of a delay of a segment of
Lessee Fiber or a Building. The Liquidated Damages and termination of a segment
with a reduction of payment obligations are the sole and exclusive remedies of
the Lessee and the sole and exclusive liabilities of Williams Communications
with respect to a delivery delay, and provided each party has complied with the
terms of this Section 5.1, under no circumstances will a delay in the Delivery
Date for a segment of Lessee Fiber or a Building be considered a default.

5.2 ACCEPTANCE AND TESTING OF FIBERS

         (a) WILLIAMS COMMUNICATIONS TESTING. Williams Communications shall give
notice to Lessee at least 21 days prior to the date Williams Communications
intends to begin testing of Lessee Fiber ("Fiber Acceptance Testing"). Lessee
shall have the right, but not the obligation, to have a representative present
at such Fiber Acceptance Testing. Williams

                                       6
<PAGE>

Communications shall perform Fiber Acceptance Testing of the Lessee Fiber and
provide test deliverables to Lessee in accordance with Exhibit A.

         (b) OBJECTIONS TO TEST RESULTS. Lessee shall have 21 calendar days
after receipt of test deliverables to provide Williams Communications written
notice of any bona fide determination by Lessee that the Lessee Fiber does not
meet the Fiber Testing Specifications. Such notice shall identify the specific
data that indicate a failure or other specific reasons that such Lessee Fiber
fail to meet the Fiber Testing Specifications.

         (c) RESPONSE TO OBJECTIONS. Upon receiving written notice from Lessee
pursuant to Section 5.2(b), Williams Communications shall either: (i)
expeditiously take such action as shall be reasonably necessary to cause such
portion of the Lessee Fiber to meet the Fiber Testing Specifications and then
re-test the Lessee Fiber in accordance with the provisions of this Article; or
(ii) provide Lessee written notice that Williams Communications disputes
Lessee's determination that the Lessee Fiber does not meet the Fiber Testing
Specifications. After taking corrective actions and re-testing the Lessee Fiber,
Williams Communications shall provide to Lessee a copy of the new test
deliverables and Lessee shall again have all rights provided in this Article
with respect to such new test deliverables. The cycle described above of
testing, taking corrective action and re-testing shall take place until the
Lessee Fiber is accepted.

         (d) INDEPENDENT TESTING. If Williams Communications provides notice to
Lessee pursuant to Subsection 5.2(c)(ii), Lessee shall within five calendar days
of such notice designate by written notice to Williams Communications the names
and addresses of three reputable and independent fiber optic testing companies.
Williams Communications shall designate one of such companies to conduct an
independent re-test of the Lessee Fiber for the relevant Lessee Fiber. If, after
such re-testing, the testing company determines that the Lessee Fiber so tested:
(i) meet the Fiber Testing Specifications, then Lessee shall pay the testing
company's charges for performing the testing and the Acceptance Date for the
relevant Lessee Fiber shall be 21 calendar days after the date that Williams
Communications originally provided its test deliverables; or (ii) do not meet
the Fiber Testing Specifications, then Williams Communications shall pay the
testing company's charges for performing the testing and shall perform the
corrective action and re-testing set forth in Subsection 5.2(c)(i).

5.3 ACCEPTANCE. Unless Lessee provides a timely written objection pursuant to
Section 5.2, the Acceptance Date for each delivery occurs on the twenty-first
calendar day after the Delivery Date, or, if earlier, the date Lessee (a)
provides written acceptance of the Lessee Fiber or Building or (b) commences use
of the Lessee Fiber or Building. Any failure by Lessee to accept or reject the
Lessee Fiber within the 21-day period, or any use of the Lessee Fiber by Lessee
Fiber for any purpose other than testing, constitutes acceptance for purposes of
this Agreement and Lessee is deemed to have accepted upon such use or on the
22nd day after the Delivery Date.

5.4 AS-BUILT DRAWINGS. Williams Communications will provide to Lessee, within
180 days of the Acceptance Date, as-built drawings of Lessee Fiber in the format
described in Exhibit D to this Agreement.

                                       7
<PAGE>

5.5 INTRABUILDING EXTENSIONS. Lessee may elect to obtain either fiber optic or
metallic (e.g., coaxial cable or copper twisted pair) extensions between a
Williams Communications Demarcation Point at a Building and another point within
the same Building. Upon written request for either such extension setting forth
the design and terminating location of such extension, Williams Communications
shall, at its sole discretion and in accordance with its then-standard order
intervals, either (a) construct a Lessee-owned riser for a nonrecurring charge
equal to its Cost; (b) designate at least one, but up to three, reputable
Williams Communications-approved contractors authorized to perform such work, in
which case Williams Communications shall have no responsibility for such
extension and Lessee shall deal directly with any such contractor for
Lessee-owned risers; or (c) provide Williams Communication-owned riser at
Williams Communications' then-current charge. Williams Communications shall
reasonably cooperate with any such approved contractors selected by Lessee to
allow them to perform such work.

5.6 USE OF PARTIALLY COMPLETED SEGMENT. If Williams Communications has not
delivered a segment of Lessee Fiber by the scheduled Delivery Date, but some
portions of the segment are available for use, Williams Communications shall,
upon request of Lessee, permit Lessee to use such available portions and Lessee
shall pay a pro rata share of the lease payment with respect to the Lessee
Fibers in such segment. In addition, in the event that Lessee elects to accept a
portion of a segment of Lessee Fiber prior to the time that a complete segment
or ring is available for use, the late fee payment set forth in Section 5.1
shall be reduced in proportion to the Lessee Fibers in the segment or ring being
utilized.

5.7 EARLY DELIVERY. In the event that Williams Communications has any Lessee
Fibers available prior to the scheduled Delivery Date, Williams Communications
may give notice to Lessee, offering to deliver such Lessee Fibers prior to the
scheduled Delivery Date therefore. Lessee shall advise Williams Communications
whether or not Lessee desires to begin using such Lessee Fibers prior to the
scheduled Delivery Date. If Lessee elects to begin such use prior to the
scheduled Delivery Date, the Term of such Lessee Fibers and payment obligations
shall commence upon the actual Acceptance Date thereof.

ARTICLE 6. COLLOCATION AND MAINTENANCE

Collocation, operation and maintenance of the Lessee Fiber is governed by the
Collocation and Maintenance Agreement, dated contemporaneously with this
Agreement.

ARTICLE 7. AUTHORIZATIONS

7.1 MAINTAINING AUTHORIZATIONS. Williams Communications shall use commercially
reasonable efforts to maintain, renew, or replace the Right-of-Way
Authorizations during the Term. If Williams Communications determines it is not
commercially reasonable to maintain, renew or replace any of its existing
Right-of-Way Authorizations during the Term, then Williams Communications shall
give notice to Lessee and shall cooperate with Lessee, at Lessee's written
request, to attempt to maintain, renew or replace such Right-of-Way
Authorizations, at Lessee's sole Cost. During the last three years of the Term,
upon written notice from Lessee requesting

                                       8
<PAGE>

such information, Williams Communications shall promptly provide written notice
of the status (including any potential or pending terminations or expirations)
of Right-of-Way Authorizations relating to the Lessee Fiber, including but not
limited to whether or not Williams Communications intends to extend or renew any
Right-of-Way Authorizations. In the event that during the Term any Right-of-Way
Authorization expires or is terminated and is not replaced, Lessee shall have
the right upon 30 days prior written notice to Williams Communications, to
terminate the Lease with respect to the Lessee Fiber affected by such expired or
terminated Right-of-Way Authorization. Upon such termination, Lessee's
obligation to make any Lease payments with respect to which the Lease has been
terminated shall expire.

7.2 EXTENSION OF LEASE TERM. To the extent Williams Communications has elected
to maintain or extend or replace Right-of-Way Authorizations with respect to
this Lease beyond the Term, Lessee may request an extension of the Term of such
Lease, and Williams Communications agrees to negotiate with Lessee with respect
to such extension, but Williams Communications shall have no obligation to grant
any such extension.

ARTICLE 8. INTENTIONALLY OMITTED

ARTICLE 9. INTERCONNECTION OF LESSEE'S SYSTEM

9.1 SPLICE POINTS. In the event Lessee seeks to establish its own
interconnection with the Lessee Fiber to establish Backbone Access, Williams
Communication shall provide, at Lessee's Cost, fiber drops from interconnection
points at Williams Communication System to the edge of Williams Communications
right-of-way at points mutually agreed upon in writing by the parties ("Splice
Point(s)"). Williams Communications shall use commercially reasonable efforts to
provide Splice Points at the locations requested by Lessee subject to the
limitations in the Right-of-Way Authorizations. Subject to the terms of the
Right-of-Way Authorizations and Section 9.3, Williams Communications shall also
provide Lessee reasonable access to any such Splice Points. Unless otherwise
agreed, Lessee must provide and install Lessee-owned manholes/handholes and/or
conduit to the selected Williams Communications manhole/handhole for Splice
Point interconnection. All work in Williams Communications manholes/handholes
and splice enclosures, including splicing and manhole/handhole penetration, will
be managed and supervised by Williams Communications.

9.2 DEMARCATION POINT.

         (a) BUILDINGS. The Demarcation Point for a Building shall be at:

                  (i) Williams Communications' fiber patch panel or the DSX-N
panel (as designated by Williams Communications) for interconnections at
Buildings having either of such panels; or

                  (ii) the furthest point inside a Building, including a local
exchange carrier's central office, to which Williams Communications is allowed
to take the fiber; and, to the extent Williams Communications is later allowed
to install or access a fiber patch panel or DSX-N

                                       9
<PAGE>

panel inside of such Building, such point shall become the Demarcation Point and
Williams Communications agrees to deliver Lessee Fiber to such point.

Where neither of the Demarcation Points described in (i) or (ii) above exist,
the Demarcation Point shall be selected by Williams Communications consistent
with reasonable industry and Williams Communications practices.

         (b) SPLICE POINTS. The Demarcation Point for each Splice Point is at
the Lessee-provided manhole/handhole unless otherwise agreed upon by the
parties..

9.3 ADDITIONAL LIMITATIONS ON INTERCONNECTION RIGHTS. Lessee's exercise of the
right to interconnect with Lessee Fibers for Backbone Access as set forth in
Section 3.4 and Section 9.1 shall be subject to any prohibitions or restrictions
in Williams Communications' Right-of-Way Authorizations. Lessee may not
establish an interconnection that Williams Communications, in its reasonable
discretion (applied without unreasonable discrimination with respect to
interconnections made by Williams Communications or third parties), determines
is likely to materially and adversely affect the Williams Communications System.

9.4 FACILITIES OWNERSHIP AND CONTROL. Lessee shall retain ownership of any
portion of facilities on its side of the Demarcation Point during the Term of
this Agreement and Williams Communications shall have no obligation to maintain,
repair, relocate, or monitor such Lessee facilities (including any fiber drop
facilities established pursuant to Section 9.1). Lessee shall not access a
splice, splice box, splice vault, or similar facility interconnecting with
Williams Communications' System. Williams Communications shall perform any work
required with respect to such splice facilities and may invoice Lessee for the
Cost of performing such work at the request of Lessee (except to the extent the
work relates to the termination in a Building).

9.5 LESSEE RESPONSIBILITY. Subject to the provisions herein, Lessee shall be
responsible for obtaining the rights required and for all costs of:

         (a) obtaining rights of way within or beyond Williams Communications'
Right-of-Way Authorizations;

         (b) obtaining building access, entry rights, ducts, or riser cables to
interconnect in buildings or any access beyond Williams Communications'
Demarcation Point with respect to a Building;

         (c) providing all Equipment and Williams Communications-approved
materials to construct and install each interconnection, including cables and
conduit and any labor charges associated therewith; and

         (d) bringing facilities to and connecting them with Williams
Communications' System.

                                       10
<PAGE>

9.6 THIRD PARTY RELATIONS. If necessary, and where applicable, Williams
Communications shall assist Lessee, at Lessee's Cost, in obtaining from any land
or building owner, Williams Communications, or private or governmental
right-of-way owner, any rights required to access and exit interconnection
points. Lessee shall use reasonable efforts to avoid damaging the relationships
between Williams Communications and such third parties.

ARTICLE 10. USE OF THE LESSEE FIBER

10.1 OBLIGATION TO COMPLY WITH LAWS; EXCLUSIVE USE. Lessee shall comply in all
material respects with all applicable government codes, ordinances, laws, rules,
regulations, Right-of-Way Authorizations and/or restrictions in its use of
Williams Communications' System. Subject to Article 20, Lessee may use the
Lessee Fiber for any lawful telecommunications purpose. Williams Communications
shall have no right to use Lessee Fiber during the Term of this Agreement.

10.2 SYSTEM DAMAGE. Williams Communications and Lessee shall promptly notify
each other of any matters pertaining to any damage or impending damage to or
loss of the Williams Communications System that are known to such party. Lessee
shall take all commercially reasonable precautions against, and shall assume
liability, subject to the terms herein, for, any damage caused by it to the
Williams Communications System. Lessee shall not use the Lessee Fiber in a way
that interferes in any material way with or materially adversely affects the use
of any fibers of Williams Communications or the Williams Communications System.

10.3 REGULATORY COOPERATION. Each party shall cooperate with and support the
other in complying with any requirements applicable to the Williams
Communications System imposed by any governmental or regulatory agency or
authority.

10.4 LIENS. Lessee shall not cause or permit any part of the Williams
Communications System to become subject to any mechanics lien, materialmans
lien, vendors lien, or any similar lien whether by operation of law or
otherwise. If Lessee breaches its obligations under this Section, it shall
immediately notify Williams Communications in writing, shall promptly cause such
lien to be discharged and released of record without cost to Williams
Communications, and shall indemnify Williams Communications against all costs
and expenses (including reasonable attorney's fees and court costs at trial and
on appeal) incurred in discharging and releasing such lien.

ARTICLE 11. PAYMENT TERMS

11.1 TIME AND METHOD OF PAYMENT. Monthly payments for Lease Fiber and Backbone
Access shall be made by wire transfer, to the account designated on the invoice
of Williams Communications, within thirty (30) days of the delivery of such
invoice. Except as otherwise set forth in this Agreement, all other amounts due
hereunder shall be paid within 30 calendar days of the invoice delivery date.
Except as otherwise provided, payments may be made by check or draft of
immediately available funds delivered to the address designated in writing by
the other party (e.g., in a statement or invoice) or, failing such designation,
to the address for notice

                                       11
<PAGE>

provided pursuant to Section 15.1. Except as set forth herein, a party may issue
an invoice after incurring any costs subject to reimbursement by the other party
or after the time period during which a charge accrues.

11.2 LATE PAYMENT CHARGES. If Lessee fails to make any payment under this
Agreement when due, such unpaid amounts shall accrue interest, from the date
such payment is due until paid, including accrued interest, at the lower of
eighteen percent (18%) annual interest or the highest percentage allowed by law.

11.3 MONTHLY NETTING AGREEMENT. Notwithstanding anything to the contrary
contained herein, that certain Monthly Netting Agreement between the parties
dated October 30, 2001 shall govern payments made under this Agreement for the
term of such Monthly Netting Agreement.

ARTICLE 12. INDEMNIFICATION

12.1 INDEMNITY OBLIGATION. Each party shall indemnify, defend, protect and hold
harmless the other party, its employees, officers, directors, agents,
shareholders, affiliates, Facility Owners/Lenders, and other parties to
Right-of-Way Authorizations that are entitled to indemnity by such indemnifying
party, from and against, and assumes liability for:

         (a) Any injury, loss or damage to any person, tangible property or
facilities of any person or entity (including reasonable attorney's fees and
costs), to the extent arising out of or resulting from the acts or omissions,
negligent or otherwise, of the indemnifying party, its officers, employees,
servants, affiliates, agents or contractors in connection with its performance
under this Agreement; and

         (b) Any claims, liabilities or damages arising out of any violation by
the indemnifying party of regulations, rules, statutes or court orders of any
local, state or federal governmental agency, court or body in connection with
its performance under this Agreement.

12.2 NO LIMITATION ON CLAIMS AGAINST OTHER PARTIES. Except as set forth herein,
and subject to the terms of any underlying agreements between Williams
Communications and any third person, nothing contained herein shall operate as a
limitation on the right of either party hereto to bring an action for damages
against any third person, including indirect, special or consequential damages,
based on any acts or omissions of such third person as such acts or omissions
may affect the construction, operation or use of the Lessee Fiber; provided,
however, that each party hereto shall assign such rights of claims, execute such
documents and do whatever else may be reasonably necessary to enable the other
party to pursue any such action against such third person.

ARTICLE 13. INSURANCE

13.1 OBLIGATION TO OBTAIN. During the Term of this Agreement, the parties shall
each obtain and maintain not less than the following insurance:

                                       12
<PAGE>

(a) Commercial General Liability Insurance, including coverage for sudden and
accidental pollution legal liability, with a combined single limit of
$10,000,000 for bodily injury and property damage per occurrence and in the
aggregate; provided that such coverage may be obtained through a combination of
specific and umbrella or excess liability policies.

(b) Worker's Compensation Insurance in amounts required by applicable law and
Employers Liability Insurance with limits not less than $1,000,000 each
accident. If a party is to perform work in Nevada, North Dakota, Ohio,
Washington, Wyoming, or West Virginia, the party shall participate in the
appropriate state fund(s) to cover all eligible employees and provide a stop gap
endorsement.

(c) Automobile Liability Insurance with a combined single limit of $2,000,000
for bodily injury and property damage per occurrence, to include coverage for
all owned, non-owned, and hired vehicles; provided that such coverage may be
obtained through a combination of specific and umbrella or excess liability
policies.

The limits set forth above are minimum limits and shall not be construed to
limit the liability of either party.

13.2 POLICY REQUIREMENTS. Each party shall obtain and maintain the insurance
policies required above with companies rated A- or better by Best's Key Rating
Guide or with a similar rating by another generally recognized rating agency.
The other party, its Affiliates, officers, directors, and employees, and any
other party entitled to indemnification hereunder shall be named as additional
insureds to the extent of such indemnification. Each party shall provide the
other party with an insurance certificate confirming compliance with the
insurance requirements of this Article. The insurance certificate shall indicate
that the other party shall be notified not less than 30 calendar days prior to
any cancellation or material change in coverage. If either party provides any of
the foregoing coverages through a claims made policy basis, that party shall
cause such policy or policies to be maintained for at least three years beyond
the expiration of this Agreement.

13.3 WAIVER OF SUBROGATION. The parties shall each obtain from the insurance
companies providing the coverages required by this Agreement a waiver of all
rights of subrogation or recovery in favor of the other party and, as
applicable, its members, managers, shareholders, Affiliates, assignees,
officers, directors, and employees or any other party entitled to indemnity
under this Agreement to the extent of such indemnity.

13.4 BLANKET POLICIES; SELF-INSURANCE. Nothing in this Agreement shall be
construed to prevent either party from satisfying its insurance obligations
pursuant to this Agreement (a) under a blanket policy or policies of insurance
that meet or exceed the requirements of this Article or (b) with respect to the
insurance required in Sections 13.1(b) and (c), with the consent of the other
party, which consent shall not be unreasonably withheld, self-insurance.

ARTICLE 14. TAXES AND FRANCHISE, LICENSE AND PERMIT FEES

                                       13
<PAGE>

14.1 OBLIGATIONS TO PAY RIGHT-OF-WAY CHARGES AND TAXES. The parties acknowledge
that a material premise of this Agreement is that during the Term, Williams
Communications shall obtain, and use commercially reasonable efforts to
maintain, its Right-of-Way Authorizations at its own cost. Williams
Communications shall timely pay any and all (a) taxes, franchise, license and
permit fees based on the physical location of the Williams Communications
System, and/or the construction thereof in or on public roads, highways or
rights-of-way; and (b) Right-of-Way Authorization payments applicable to the
System. Notwithstanding the foregoing, Lessee shall pay any taxes, franchise,
license and permit fees based upon its Lease or use of Lessee Fiber. Failure to
pay such taxes or payments by the party responsible therefor, which continues
after seven (7) calendar days written notice thereof by the other party, shall
authorize, but not obligate, the other party to make such payments and
responsible party shall reimburse the other party for such payments promptly
upon demand together with interest at the rate set forth in Section 14.2 from
the date that the other party made such payment until reimbursed by the
responsible party.

14.2 OBLIGATION TO TIMELY PAY TAXES BASED ON REVENUES. Except as set forth in
Section 14.1, Lessee shall pay any and all sales, use, income, gross receipts or
other taxes assessed based upon revenues Lessee receives due to its use of the
Lessee Fiber.

14.3 RIGHT TO CONTEST TAXES. Notwithstanding any provision herein to the
contrary, a party shall have the right by appropriate proceedings brought in
good faith to protest the imposition and/or amount of any taxes or franchise,
license or permit fees imposed on or assessed against it. In such event, the
protesting party shall indemnify and hold the other party harmless from any
expense, legal action or cost, including reasonable attorney's fees, resulting
from the protesting party's exercise of its rights hereunder.

14.4 PROHIBITION ON AGREEMENTS AFFECTING OTHER PARTY. Without the prior consent
of Lessee, Williams Communications shall not enter into any agreement that would
have the effect of obligating Lessee to pay additional taxes or franchise,
license or permit fees unless such agreement is required by a government or
agency thereof in connection with the grant of a franchise, license, permit or
similar governmental requirement or required pursuant to a Right-of-Way
Authorization.

ARTICLE 15. NOTICE

15.1 ADDRESSES. Unless otherwise provided herein, all notices and communications
concerning this Agreement shall be addressed to the other party as follows:

If to WC:                  Williams Communications, LLC
                           Attn: Contract Management
                           One Technology  Center, MD-6H
                           Tulsa, Oklahoma 74103
                           Facsimile:  (918) 547-0460

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<PAGE>

with a copy to:            Williams Communications, LLC
                           Attn:   Lease Administration
                           One Technology Center, 8A
                           Tulsa, OK 74103
                           Facsimile:  (918) 547-2914

and                        Williams Communications, LLC
                           Attn: General Counsel
                           One Technology Center, TC-15A
                           Tulsa, Oklahoma 7415
                           Facsimile:  (918) 547-2630

If to Lessee:              Metromedia Fiber Network Services, Inc.
                           360 Hamilton Avenue
                           White Plains, New York 10601
                           Attn:  President
                           Facsimile:  (914) 421-7550

With a copy to:            Metromedia Fiber Network Services, Inc.
                           360 Hamilton Avenue
                           White Plains, New York 10601
                           Attn:  General Counsel
                           Facsimile:  (914) 421-6793

or at such other address as may be designated in writing to the other party (a
party may designate a separate address for delivery of invoices).

15.2 METHOD FOR DELIVERING NOTICES AND INVOICES. Unless otherwise provided
herein, notices and invoices shall be in writing and sent by registered or
certified U.S. Mail, postage prepaid, or by commercial overnight delivery
service, or by facsimile, and shall be deemed served or delivered to the
addressee or its office on the date of receipt acknowledgment, or if by
facsimile, upon confirmation of transmission or if postal claim notices are
given, on the date of its return marked "unclaimed," provided, however, that
upon receipt of a returned notice marked "unclaimed," the sending party shall
make reasonable effort to contact and notify the other party by telephone.

ARTICLE 16. CONFIDENTIALITY AND PUBLICITY

16.1 CONFIDENTIAL INFORMATION. The terms and conditions of this Agreement and
all documents referenced herein, communications between the parties regarding
this Agreement, information provided in connection with or pursuant to this
Agreement or the service to be provided hereunder, as well as any financial or
business information of either party are confidential ("Confidential
Information"). Such Confidential Information shall be held in confidence, and
the receiving party shall afford such Confidential Information the same care and
protection as it affords generally to its own Confidential Information (which in
any case shall be

                                       15
<PAGE>

not less than reasonable care) to avoid disclosure to or unauthorized use by any
third party. All Confidential Information shall remain the property of the
disclosing party, shall be used by the receiving party only for its intended
purpose, and such Confidential Information, including all copies thereof, shall
be returned to the disclosing party or destroyed after the receiving party's
need for it has expired or upon the request of the disclosing party.
Confidential Information shall not be reproduced except to the extent necessary
to accomplish the purposes and intent of this Agreement, or as otherwise may be
permitted in writing by the disclosing party. Notwithstanding anything contained
herein to the contrary, neither party shall be required to keep confidential any
information that (a) becomes publicly available other than through the actions
or omissions of the receiving party; (b) is required to be disclosed pursuant to
a governmental or judicial rule, order or regulation; (c) the recipient of the
Confidential Information independently develops; (d) becomes available to the
receiving party without restriction from a third party; (e) is required by its
lender and is given to such lender on a confidential basis; or (f) is subject to
"due diligence" review by a potential acquirer of a significant equity interest
in it or its ultimate or intermediate parent company (a significant equity
interest shall be an interest of at least 5% of the voting equity of a party or
of securities having a market value of at least $100 million) and is given to
such potential acquirer on a confidential basis.

16.2 PUBLICITY. Following the Effective Date, the parties shall coordinate and
cooperate with each other when making public announcements or disclosures to any
governmental entities related to the terms of this Agreement and each party
shall have the right to promptly review, comment upon and approve (such approval
not to be unreasonably withheld or delayed) any publicity materials, press
releases or other public statements or disclosures to governmental entities by
the other party that refer to, or that describe any aspect of this Agreement;
provided, however, that no party shall have an approval right with respect to
any public announcements or disclosures to any governmental entities which are,
in the reasonable judgment of the party making such public announcement or
disclosure, required by law.

ARTICLE 17. DEFAULT

17.1 PARTIAL TERMINATION UPON DEFAULT. Either party, upon written notice to the
other party after the other party's default and the other party's failure to
cure any default in the performance of any material obligation hereunder prior
to the end of the applicable cure period, may terminate this Agreement as herein
provided, provided that at the time of termination such default remains uncured:

         (a) Williams Communications may terminate this Agreement, to the extent
that Lessee is the defaulting party; and/or

         (b) Lessee may terminate this Agreement, to the extent that the default
relates to the Williams Communications System (or, at Lessee's election, with
respect to any Lessee Fiber for which the Acceptance Date has not occurred as
provided in Article 5), if Williams Communications is the defaulting party.

                                       16
<PAGE>

17.2 SPECIFIC DEFAULT EVENTS. Events of default shall include but not be limited
to: (a) the making of a general assignment for the benefit of the defaulting
party's creditors; (b) the filing of a voluntary petition in bankruptcy or the
filing of a petition in bankruptcy or other insolvency protection against the
defaulting party which is not dismissed within 90 calendar days thereafter; (c)
the filing by the defaulting party of any petition or answer seeking, consenting
to, or acquiescing in reorganization, arrangement, adjustment, composition,
liquidation, dissolution, or similar relief; (d) any violation by Lessee of the
restrictions set forth in Section 20.3.

17.3 CURE PERIOD. The cure period applicable to Section 17.1 shall be:

         (a) with respect to a default in payment, the period ending ten (10)
business days after a written notice of such default is given;

         (b) with respect to any other default, the period ending 30 calendar
days after a written notice of such default is given, provided, however, that if
such default cannot with reasonable diligence be cured within such 30-day
period, and such other party has commenced to effect a cure immediately upon
receipt of such notice, and diligently pursues such cure, then such cure period
will be extended for a period reasonably required to cure such default but in no
event more than an additional 30 calendar days.

17.4 FAILURE TO CURE. Upon the failure by the defaulting party to timely cure
any such default after notice thereof from the other party, the other party may,
subject to the provisions of Section 19, take such action as it determines, in
its sole discretion, to be necessary to correct the default, and pursue any
legal remedies it may have under this Agreement, applicable law, or principles
of equity relating to such breach.

17.5 WAIVER OF SPECIFIC DEFAULTS. Any event of default by the defaulting party
may be waived under the terms of this Agreement at the other party's option. Any
such waiver shall be in writing.

17.6 DISPUTED AMOUNTS. Notwithstanding the other provisions of this Article,
failure to pay an amount subject to a bona fide dispute shall not be an event of
default (until such dispute is resolved pursuant to Article 19 or otherwise) to
the extent the disputed amount is (a) less than $100,000 or (b) paid into an
escrow account of a nationally chartered domestic bank with offices in New York
pending resolution of the dispute. The interest rate set forth in Section 11.2
shall apply to amounts so withheld or paid into escrow by one party and later
awarded to the other party, but the party paying such amounts into escrow shall,
upon closing of an escrow account, be entitled to any interest received from,
and responsible for paying any fees charged by, the bank holding the escrow
funds.

ARTICLE 18. FORCE MAJEURE

Neither party shall be in default under this Agreement with respect to any delay
in such party's performance (other than the payment of monetary amounts due
under this Agreement) caused by any of the following conditions: act of God,
fire, flood, material shortage or unavailability not

                                       17
<PAGE>

resulting from the responsible party's failure to timely place orders therefor,
lack of transportation, government codes, ordinances, laws, rules, regulations
or restrictions, war or civil disorder, or any other cause beyond the reasonable
control of such party, provided that the party claiming relief under this
Section shall promptly notify the other in writing of the existence of the event
relied on and the cessation or termination of said event. The party claiming
relief under this Section shall exercise commercially reasonable efforts to
minimize the time for any such delay.

ARTICLE 19. ARBITRATION

19.1 OBLIGATION TO ARBITRATE. Any dispute or disagreement relating to this
Agreement or any matter arising between Lessee and Williams Communications in
connection with this Agreement which is not settled to the mutual satisfaction
of Lessee and Williams Communications within 30 calendar days from the date that
either party informs the other in writing that such dispute or disagreement
exists, shall be settled by arbitration by a single arbitrator in Chicago,
Illinois, in accordance with the Commercial Arbitration Rules of the American
Arbitration Association in effect on the date that such notice is given. If the
parties are unable to agree on a single arbitrator within fifteen calendar days,
the American Arbitration Association shall select an arbitrator. The decision of
the arbitrator shall be final and binding upon the parties and shall include
written findings of law and fact, and judgment may be obtained thereon by either
party in a court of competent jurisdiction. Each party shall bear the cost of
preparing and presenting its own case. The cost of the arbitration, including
the fees and expenses of the arbitrator, shall be shared equally by the parties
unless the award otherwise provides.

19.2 EXCEPTIONS TO ARBITRATION OBLIGATION. The obligation herein to arbitrate
shall not be binding upon any party with respect to requests for preliminary
injunctions, temporary restraining orders or other procedures in a court of
competent jurisdiction to obtain interim relief when deemed necessary by such
court to preserve the status quo or prevent irreparable injury pending
resolution by arbitration of the actual dispute.

ARTICLE 20. ASSIGNMENT

20.1 RESTRICTIONS ON ASSIGNMENT. Except as provided in the second sentence of
this Section, neither party shall assign or otherwise transfer this Agreement or
its rights or obligations hereunder to any other party without the prior written
consent of the other party, which consent shall not be unreasonably withheld or
delayed. Either party shall have the right, without the other party's consent,
to assign or otherwise transfer this Agreement in whole or in part as collateral
to any lender or to any of its Affiliates or to any corporation into which it
may be merged or consolidated or which purchases all or substantially all of its
assets.

20.2 AGREEMENT BINDS SUCCESSORS. This Agreement and each of the party's
respective rights and obligations under this Agreement, shall be binding upon
and shall inure to the benefit of the parties hereto and each of their
respective successors and permitted assigns. Any assignment or transfer shall be
subject to the other party's rights under this Agreement and any assignee or
transferee shall continue to perform the assigning party's obligations under
this Agreement.

                                       18
<PAGE>

20.3 RESTRICTION ON TRANSFER OF DARK FIBER RIGHTS. Williams Communications is
providing the Lessee Fiber for Lessee's exclusive use. Lessee may not sublease,
swap, assign, license, sublicense, sell or share the Lessee Fiber as "dark
fiber", as such term is commonly understood in the telecommunications industry.

20.4 FINANCING ARRANGEMENTS. Either party shall have the right, directly or
through an Affiliate, to enter into financing arrangements (including secured
loans, leases, sales with lease-back, or leases with lease-back arrangements,
purchase-money or vendor financing, conditional sales transactions, or other
arrangements) with one or more financial institutions, vendors, suppliers or
other financing sources that, with respect to Williams Communications, relate to
the Williams Communications System and, with respect to Lessee, relate to
Lessee's Lease rights (and not to any property right in the Williams
Communications System or the Lessee Fiber).

ARTICLE 21. RULES OF CONSTRUCTION

21.1 GOVERNING LAW. This Agreement shall be deemed a New York agreement and
shall be governed by and construed in accordance with the domestic laws of the
State of New York applicable to New York agreements, without reference to its
choice of law principles.

21.2 INTERPRETATION. The captions or headings in this Agreement are strictly for
convenience and shall not be considered in interpreting this Agreement or as
amplifying or limiting any of its content. Words in this Agreement that import
the singular connotation shall be interpreted as plural, and words that import
the plural connotation shall be interpreted as singular, as the identity of the
parties or objects referred to may require. References to "person" or "entity"
each include natural persons and legal entities, including corporations, limited
liability companies, partnerships, sole proprietorships, business divisions,
unincorporated associations, governmental entities, and any entities entitled to
bring an action in, or that are subject to suit in an action before, any state
or federal court of the United States. Whenever the words "include," "includes"
or "including" are used in this Agreement, they shall be deemed to be followed
by the words "without limitation." "Days" refers to calendar days, except that
references to "business days" exclude Saturdays, Sundays and holidays during
which nationally chartered banks in New York, New York are authorized or
required to close. Unless expressly defined herein, words having well-known
technical or trade meanings shall be so construed.

21.3 CUMULATIVE REMEDIES. Except as set forth to the contrary herein, any right
or remedy of either party shall be cumulative and without prejudice to any other
right or remedy, whether contained herein or not.

21.4 NO THIRD-PARTY RIGHTS. Nothing in this Agreement is intended to provide any
legal rights to anyone not an executing party of this Agreement except under the
indemnification and insurance provisions and except (a) as set forth in Sections
22.4 and 23.2 and (b) that the Facility Owners/Lenders shall be entitled to rely
on and have the benefit of Article 23.

                                       19
<PAGE>

21.5 AGREEMENT FULLY NEGOTIATED. This Agreement has been fully negotiated
between and jointly drafted by the parties.

21.6 DOCUMENT PRECEDENCE. In the event of a conflict between the provisions of
this Agreement and those of any Exhibit, the provisions of this Agreement shall
prevail and such Exhibits shall be corrected accordingly.

21.7 INDUSTRY STANDARDS. Except as otherwise set forth herein, for the purpose
of this Agreement the normal standards of performance within the
telecommunications industry in the relevant market shall be the measure of
whether a party's performance is reasonable and timely.

21.8 CROSS REFERENCES. Except as the context otherwise indicates, all references
to Exhibits, Parts, Schedules, Articles, Sections, Subsections, Clauses, and
Paragraphs refer to provisions of this Agreement.

21.9 LIMITED EFFECT OF WAIVER. The failure of either Williams Communications or
Lessee to enforce any of the provisions of this Agreement, or the waiver thereof
in any instance, shall not be construed as a general waiver or relinquishment on
its part of any such provision, but the same shall nevertheless be and remain in
full force and effect.

21.10 SEVERABILITY. If any term, covenant or condition in this Agreement shall,
to any extent, be invalid or unenforceable in any respect under the laws
governing this Agreement, the remainder of this Agreement shall not be affected
thereby, and each term, covenant or condition of this Agreement shall be valid
and enforceable to the fullest extent permitted by law.

21.11 NO PARTNERSHIP CREATED. The relationship between Williams Communications
and Lessee shall not be that of partners, agents, or joint venturers for one
another, and nothing contained in this Agreement shall be deemed to constitute a
partnership or agency agreement between them for any purposes, including federal
income tax purposes. The parties, in performing any of their obligations
hereunder, shall be independent contractors or independent parties and shall
discharge their contractual obligations at their own risk.

21.12 NO REIMBURSEMENT. Unless provided otherwise herein, each party shall
perform its obligations without right of reimbursement or contribution from the
other party.

21.13 RIGHT TO SUBCONTRACT. Williams Communications or the underlying facility
owner may subcontract for any of its obligations hereunder, including splicing
and testing services. Williams Communications may fulfill its obligations to
provide Lessee Fiber in its System by constructing, acquiring title to,
acquiring rights in, leasing, entering into financing leases, or otherwise
obtaining a right to use its System or various portions thereof. The use of any
such subcontractor, underlying Lease provider, financing arrangement, or other
arrangement shall not relieve Williams Communications of its obligations
hereunder.

21.14 SURVIVAL. No termination or expiration of this Agreement, either in part
or in whole, shall affect the rights or obligations of any party hereto: (i)
with respect to any payment hereunder for

                                       20
<PAGE>

services rendered prior to the date of termination; (ii) pursuant to Articles
12, 13, 14, 16, 19, 21, 23, and 24 entitled Indemnification; Insurance; Taxes
and Franchise, License, and Permit Fees; Confidentiality and Publicity;
Arbitration; Rules of Construction; Limitation of Liability; and Audit Rights;
respectively; or (iii) pursuant to other provisions of this Agreement that, by
their sense and context, are intended to survive termination of this Agreement.

ARTICLE 22. REPRESENTATIONS AND WARRANTIES

22.1 AGREEMENT VALIDITY. Each party represents and warrants that:

         (a) It has the full right and authority to enter into, execute, deliver
and perform its obligations under this Agreement;

         (b) It has taken all requisite corporate action to approve the
execution, delivery and performance of this Agreement;

         (c) This Agreement constitutes a legal, valid and binding obligation
enforceable against such party in accordance with its terms;

         (d) Its execution of and performance under this Agreement shall not
violate any applicable existing regulations, rules, statutes or court orders of
any local, state or federal government agency, court or body; and

         (e) It has the right pursuant to such party's Right-of-Way
Authorizations to grant the rights to the other party as set forth in this
Agreement.

22.2 ACCEPTANCE DATE REPRESENTATIONS. As of the Acceptance Date for any Lessee
Fiber, Williams Communications represents that:

         (a) Williams Communications or the underlying facility owner for any
portion of the Lessee Fiber shall have obtained all Right-of-Way Authorizations
necessary for the installation and use of the Lessee Fiber hereunder;

         (b) Williams Communications shall have obtained by Lease agreement,
lease, or otherwise the right to use portions of the Lessee Fiber it does not
own;

         (c) Williams Communications shall have obtained all Right-of-Way
Authorizations for the Lessee Fiber;

         (d) no Right-of-Way Authorizations for such Lessee Fiber impose
unreasonable limitations or requirements on Lessee's exercise of its rights
under this Agreement; and

         (e) the Lessee Fiber has been designed, engineered, installed, and
constructed in accordance with the specifications set forth in Exhibit E and in
compliance with all applicable

                                       21
<PAGE>

building, construction and safety codes for such construction and installation,
as well as any and all other applicable governmental laws, codes, ordinances,
statutes and regulations.

22.3 DISCLAIMER OF WARRANTY. EXCEPT AS SPECIFICALLY SET FORTH IN THIS AGREEMENT,
Williams Communications MAKES NO WARRANTY TO LESSEE OR ANY OTHER PERSON OR
ENTITY, WHETHER EXPRESS, IMPLIED, OR STATUTORY, AS TO THE DESCRIPTION, QUALITY,
MERCHANTABILITY, COMPLETENESS OR FITNESS FOR ANY PURPOSE OF ANY FIBERS OR ANY
SERVICE PROVIDED HEREUNDER OR DESCRIBED HEREIN, OR AS TO ANY OTHER MATTER, ALL
OF WHICH WARRANTIES ARE HEREBY EXCLUDED AND DISCLAIMED.

22.4 NO THIRD-PARTY WARRANTIES. NO FACILITY OWNERS/LENDERS HAVE MADE ANY
REPRESENTATION OR WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, TO LESSEE CONCERNING
Williams Communications, LESSEE FIBERS, THE CABLE, OR THE SYSTEM OR AS TO ANY OF
THE MATTERS SET FORTH IN SECTIONS 22.1 OR 22.2. NO LESSEE LENDERS HAVE MADE ANY
REPRESENTATION OR WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, TO Williams
Communications CONCERNING LESSEE, LESSEE FIBERS, THE CABLE, ANY LEASES OR THE
Williams Communications SYSTEM OR AS TO ANY OF THE MATTERS SET FORTH IN SECTIONS
22.1 OR 22.2 OR AS TO ANY OTHER MATTER.

ARTICLE 23. LIMITATION OF LIABILITY

23.1 RESTRICTION ON TYPES OF LIABILITY. Notwithstanding any provision of this
Agreement to the contrary, in no event shall either party be liable to the other
party for any special, incidental, indirect, punitive, reliance or consequential
damages, whether foreseeable or not, arising out of, or in connection with this
Agreement, in tort, breach of contract, breach of warranty, strict liability or
any other cause of action, including damage or loss of property or equipment,
loss of profits or revenue, cost of capital, cost of replacement services, or
claims of customers, whether occasioned by any repair or maintenance performed
by, or failed to be performed by, the first party or any other cause whatsoever.

23.2 NO RECOURSE AGAINST RELEASED PARTIES. Neither party shall have any recourse
of any kind against any Released Party or any assets of a Released Party under
this Agreement, it being expressly agreed and understood that no liability
whatever shall attach to or be incurred by any Released Party under or by reason
of this Agreement or any other instrument, arrangement or understanding related
to Lessee Fiber. Each party waives all such recourse to the extent set forth in
this Section on behalf of its successors, assigns, and any entity claiming by,
through, or under such party.

23.3 NO PERSONAL LIABILITY. Each action or claim against any party arising under
or relating to this Agreement shall be made only against such party as a
corporation, and any liability relating thereto shall be enforceable only
against the corporate assets of such party. No party shall seek to pierce the
corporate veil or otherwise seek to impose any liability relating to, or arising
from, this Agreement against any shareholder, employee, officer, director or
agent of the other party. Each

                                       22
<PAGE>

of such persons is an intended beneficiary of the mutual promises set forth in
this Section and shall be entitled to enforce the obligations or provisions of
this Section.

ARTICLE 24. AUDIT RIGHTS

Each party shall keep such books and records (which shall be maintained on a
consistent basis and substantially in accordance with generally accepted
accounting principles) as shall readily disclose the basis for any charges
(except charges fixed in advance by this Agreement or by separate agreement of
the parties) or credits, ordinary or extraordinary, billed or due to the other
party under this Agreement and shall make them available for examination, audit,
and reproduction by the other party and its agents for a period of one year
after such charge or credit is billed or due. To the extent a party seeks
reimbursement of out-of-pocket costs or services provided on a per-hour basis,
it shall provide reasonable supporting documentation to the other party.

ARTICLE 25. IMPROPER PAYMENTS PROHIBITED

Neither party shall use any funds received under this agreement for illegal or
otherwise "improper" purposes. Neither party shall pay any commission, fees or
rebates to any employee of the other party. If either party has reasonable cause
to believe that one of the provisions in this article has been violated, it, or
its representative, may audit the books and records of the other party for the
sole purpose of establishing compliance with such provisions.

ARTICLE 26. ENTIRE AGREEMENT; AMENDMENT; EXECUTION

26.1 INTEGRATION; INCORPORATION; MODIFICATION. This Agreement constitutes the
entire agreement and understanding between the parties with respect to the
subject matter hereof and supersedes all prior agreements whether written or
oral relating to the subject matter hereof, which are of no further force or
effect. The Exhibits and Schedules referred to herein are integral parts hereof
and are hereby made a part of this Agreement. This Agreement may be modified or
supplemented only by an instrument in writing executed by a duly authorized
representative of each party.

26.2 COUNTERPARTS; EXECUTION. This Agreement may be executed in one or more
counterparts, all of which taken together shall constitute one and the same
instrument. A party may duly execute and deliver this Agreement by execution and
facsimile delivery of the signature page of a counterpart to the other party,
provided that, if delivery is made by facsimile, the executing party shall
promptly deliver a complete counterpart that it has executed to the other party.

                                       23
<PAGE>

In confirmation of their consent to the terms and conditions contained in this
Agreement and intending to be legally bound hereby, the parties have executed
this Lease Agreement as of the date first above written.

METROMEDIA FIBER NATIONAL NETWORK, INC., a Delaware corporation

Signature:        /s/ William G. La Perch
          -------------------------------------------------

(Print) Name:     William G. La Perch
              ---------------------------------------------

(Print) Title:    President
              ---------------------------------------------

WILLIAMS COMMUNICATIONS, LLC, a Delaware limited liability company

Signature:        /s/ Howard E. Janzen
          -------------------------------------------------

(Print) Name:     Howard E. Janzen
              ---------------------------------------------

(Print) Title:    President & CEO
              ---------------------------------------------

                                       24
<PAGE>

                                    EXHIBIT A

                      WILLIAMS FIBER SPLICING, TESTING AND
                       ACCEPTANCE STANDARDS AND PROCEDURES

1. Testing

         A. Williams Communications shall use an optical time domain
reflectometer ("OTDR") to test splices and shall use an OTDR and a 1-km launch
reel to test pigtail connectors. Such initial construction tests shall be
uni-directional and performed at 1550 nm.

         B. The loss value of the pigtail connector and its associated splice
measured from a two point uni-directional OTDR test will not exceed 0.8 dB. For
values greater than this, the splice will be broken and re-spliced until an
acceptable loss value is achieved. If after five (5) attempts, the contractor is
not able to produce a loss value less than 0.8 dB, the splice will be marked as
Out-of-Spec (OOS). The pigtail connector and associated splice with launch box
connector shall not have reflectance >-45dB, i.e., -43 dB or -41 dB is
unacceptable. If cleaning does not reduce reflectance then contractor must
re-splice a new pigtail.

         C. If the loss value for a splice, when measured in one direction with
an OTDR, exceeds 0.15 dB, Williams Communications shall break the splice and
re-splice until the loss value is 0.15 dB or less, provided that, if Williams
Communications is not able to achieve a loss value of 0.15 dB after three total
splicing attempts, then the maximum loss value shall be 0.3 dB. If, after two
additional resplicing attempts, Williams Communications is not able to achieve a
loss value of 0.3 dB or less, then Williams Communications shall mark the splice
as Out-of-Spec (OOS).

2. End-to-End Testing

         A. After Williams Communications has established end-to-end
connectivity on the fibers during initial construction, it shall:

               o    perform bi-directional end-to-end tests,

               o    test continuity to confirm that no fibers have been
                    "frogged" or crossed at any splice points,

               o    record loss measurements using a light source and a power
                    meter, and

               o    take OTDR traces and record splice loss measurements.

         B. Williams Communications shall perform the bi-directional end-to-end
tests and OTDR traces at both 1310 nm and 1550 nm, provided that 1310nm OTDR
tests are not required for spans longer than 64 kilometers. Williams
Communications shall measure and verify losses for each splice point in both
directions and average the loss values. The average of all bi-directional splice
losses within each span shall be 0.15 dB or less. Williams Communications shall
mark any splice point as Out-of-Spec (OOS) that has an average loss value, based
on bi-directional OTDR testing, in excess of 0.3 dB. No reflective splices will
be accepted.

Exhibit A - Page 1
<PAGE>

3. Post-Construction Testing

After performing permanent resplicing (in conjunction with repair of a cable
cut, replacement of a segment of cable, or other work after initial installation
and splicing of the cable), the test procedures set forth in Section 2
(End-to-End Testing) of this Exhibit, shall apply to the relevant fibers and
cable segments. The provisions in Sections 4 (OTDR Equipment and Settings) and 5
(Acceptance Test Deliverables) of this Exhibit, that are relevant to such
testing shall also apply. Williams Communications may, after the Acceptance
Date, adopt any alternative methods of testing that are generally accepted in
the industry and that provide sufficient data to fulfill the objectives of the
tests set forth in this exhibit.

4. Out-of-Spec Splices

Out-of-Spec splices shall be noted, but shall not preclude acceptance of a fiber
if the Out-of-Spec condition does not affect transmission capability (based on
use of then-prevailing telecommunications industry standards applicable to
equipment generally used with the relevant type of fiber) or create a
significant possibility of an outage.

5. OTDR Equipment and Settings

Williams Communications shall use OTDR equipment and settings that are, in its
reasonable opinion, suitable for performing accurate measurements of the fiber
installed. Such equipment and settings shall include, without limitation, the
Laser Precision TD3000 and CMA4000 models and compatible models for OTDR
testing, and the following settings:

A. Index of refraction settings:

<Table>
<Caption>
                                  1310 nm                 1550 nm
                                  -----------------       ----------------
<S>                               <C>                     <C>

        Lucent Truwave            1.4738                  1.4732

        Corning SMF-28            1.4675                  1.4681

        Corning SMF-LS            1.471                   1.470

        Corning LEAF              1.470                   1.469

        Sumitomo fiber            1.467                   1.467
</Table>

Exhibit A - Page 2
<PAGE>

6. Acceptance Test Deliverables

Williams Communications shall provide data sheets or computer media containing
the following information for the relevant fibers and cable segments:

         A. Verification of end-to-end fiber continuity with power level
readings for each fiber taken with a light source and power meter.

         B. Verification that the loss at each splice point is either (i) below
0.3 dB or (ii) in accordance with the requirements of Section 4 of this Exhibit.

         C. The final bi-directional OTDR test data, with distances.

         D. Cable manufacturer, cable type (buffer/ribbon), fiber type, cable
reel number, number of fibers, number of fibers per tube, and distance of each
section of cable between splice points.

         E. Final pigtail OTDR test data

7. General Testing Procedures and Delivery of Test Results

         A. If Williams Communications Fiber Acceptance Testing of a Selected
Segment begins prior to the twentieth (20th) day after the Effective Date, then
Williams Communications shall provide Lessee with a copy of the test
deliverables on a Segment-by-Segment basis by twenty (20) calendar days after
the later of (i) the conclusion of such Fiber Acceptance Testing of a Segment or
(ii) the Effective Date.

         B. If Williams Communications Fiber Acceptance Testing begins on or
after the twentieth (20th) day after the Effective Date, the provisions of this
subsection shall apply. Williams Communications Fiber Acceptance Testing shall
progress Segment by Segment along the Route as cable splicing progresses, so
that test deliverables may be reviewed in a timely manner. Lessee shall have the
right, but not the obligation, to have an individual present to observe the
Fiber Acceptance Testing. Within twenty (20) calendar days after the conclusion
of any Fiber Acceptance Testing of the Lessee Fibers conducted by Williams
Communications in any given Segment, Williams Communications shall provide
Lessee with a copy of the test deliverables.

         C. Williams Communications shall, upon written request, provide Lessee
with its testing schedule for any Segment promptly after developing such
schedule.

Exhibit A - Page 3
<PAGE>

8. Lessee Testing

The following procedures shall apply to Lessee testing:

         A. If Williams Communications' Fiber Acceptance Testing begins on or
after the twentieth (20th) day after the Effective Date, Lessee may perform its
own concurrent Fiber Acceptance Testing of the Lessee Fibers at the same time
Williams Communications performs testing at each location. If Lessee elects to
perform such testing, it shall notify Williams Communications of its intent to
do so no later than ten (10) days after the Effective Date. The parties shall
cooperate to facilitate such separate, but concurrent, Fiber Acceptance Testing,
provided that the Lessee shall conform to Williams Communications testing
schedule.

         B. If Williams Communications' Fiber Acceptance Testing begins prior to
the twentieth (20th) day after the Effective Date, or if Lessee does not elect
to perform concurrent testing pursuant to Subsection 8.A of this Exhibit, Lessee
may perform its own Fiber Acceptance Testing of the Lessee Fibers after Williams
Communications Fiber Acceptance Testing begins. Lessee shall provide Williams
Communications at least seven (7) days' prior notice of Lessee's testing
schedule. Williams Communications shall have the right, but not the obligation,
to have an individual present to observe Lessee's Fiber Acceptance Testing.

         C. Within twenty (20) calendar days after the conclusion of any Fiber
Acceptance Testing of the Lessee Fibers conducted by Lessee in any given
Segment, the Lessee shall notify Williams Communications of any detected
failures to meet the specifications set forth in Section 2 of this Exhibit. The
Lessee's exercise or non-exercise of its right to conduct Fiber Acceptance
Testing pursuant shall not extend or shorten the time periods for Lessee to
determine, pursuant to the Agreement, if the Fibers meet the Acceptance
Standards.

         D. The Lessee must notify Williams Communications of its intent to
perform acceptance testing within 10 calendar days following the later of the
date it receives notification of route completion or the date it receives the
results of Final Acceptance Testing.

1. Testing

         A. Williams Communications shall use an optical time domain
reflectometer ("OTDR") to test splices and shall use an OTDR and a 1-km launch
reel to test pigtail connectors. Such initial construction tests shall be
uni-directional and performed at 1550 nm.

         B. The loss value of the pigtail connector and its associated splice
measured from a two point uni-directional OTDR test will not exceed 0.8 dB. For
values greater than this, the splice will be broken and re-spliced until an
acceptable loss value is achieved. If after five (5) attempts, the contractor is
not able to produce a loss value less than 0.8 dB, the splice will be marked as
Out-of-Spec (OOS). The pigtail connector and associated splice with launch box
connector shall not have reflectance >-45dB, i.e., -43 dB or -41 dB is
unacceptable. If cleaning does not reduce reflectance then contractor must
re-splice a new pigtail.

Exhibit A - Page 4
<PAGE>

         C. If the loss value for a splice, when measured in one direction with
an OTDR, exceeds 0.15 dB, Williams Communications shall break the splice and
re-splice until the loss value is 0.15 dB or less, provided that, if Williams
Communications is not able to achieve a loss value of 0.15 dB after three total
splicing attempts, then the maximum loss value shall be 0.3 dB. If, after two
additional resplicing attempts, Williams Communications is not able to achieve a
loss value of 0.3 dB or less, then Williams Communications shall mark the splice
as Out-of-Spec (OOS).

2. End-to-End Testing

         A. After Williams Communications has established end-to-end
connectivity on the fibers during initial construction, it shall:

               o    perform bi-directional end-to-end tests,

               o    test continuity to confirm that no fibers have been
                    "frogged" or crossed at any splice points,

               o    record loss measurements using a light source and a power
                    meter, and

               o    take OTDR traces and record splice loss measurements.

         B. Williams Communications shall perform the bi-directional end-to-end
tests and OTDR traces at both 1310 nm and 1550 nm, provided that 1310nm OTDR
tests are not required for spans longer than 64 kilometers. Williams
Communications shall measure and verify losses for each splice point in both
directions and average the loss values. The average of all bi-directional splice
losses within each span shall be 0.15 dB or less. Williams Communications shall
mark any splice point as Out-of-Spec (OOS) that has an average loss value, based
on bi-directional OTDR testing, in excess of 0.3 dB. No reflective splices will
be accepted.

3. Post-Construction Testing

After performing permanent resplicing (in conjunction with repair of a cable
cut, replacement of a segment of cable, or other work after initial installation
and splicing of the cable), the test procedures set forth in Section 2
(End-to-End Testing) of this Exhibit, shall apply to the relevant fibers and
cable segments. The provisions in Sections 4 (OTDR Equipment and Settings) and 5
(Acceptance Test Deliverables) of this Exhibit, that are relevant to such
testing shall also apply. Williams Communications may, after the Acceptance
Date, adopt any alternative methods of testing that are generally accepted in
the industry and that provide sufficient data to fulfill the objectives of the
tests set forth in this exhibit.

4. Out-of-Spec Splices

Out-of-Spec splices shall be noted, but shall not preclude acceptance of a fiber
if the Out-of-Spec condition does not affect transmission capability (based on
use of then-prevailing telecommunications industry standards applicable to
equipment generally used with the relevant type of fiber) or create a
significant possibility of an outage.

5. OTDR Equipment and Settings

Exhibit A - Page 5
<PAGE>

Williams Communications shall use OTDR equipment and settings that are, in its
reasonable opinion, suitable for performing accurate measurements of the fiber
installed. Such equipment and settings shall include, without limitation, the
Laser Precision TD3000 and CMA4000 models and compatible models for OTDR
testing, and the following settings:

A. Index of refraction settings:

<Table>
<Caption>
                                  1310 nm                 1550 nm
                                  -----------------       ----------------
<S>                               <C>                     <C>

           Lucent Truwave         1.4738                   1.4732

           Corning SMF-28         1.4675                   1.4681

           Corning SMF-LS         1.471                    1.470

           Corning LEAF           1.470                    1.469

           Sumitomo fiber         1.467                    1.467
</Table>

Exhibit A - Page 6
<PAGE>

6. Acceptance Test Deliverables

Williams Communications shall provide data sheets or computer media containing
the following information for the relevant fibers and cable segments:

         A. Verification of end-to-end fiber continuity with power level
readings for each fiber taken with a light source and power meter.

         B. Verification that the loss at each splice point is either (i) below
0.3 dB or (ii) in accordance with the requirements of Section 4 of this Exhibit.

         C. The final bi-directional OTDR test data, with distances.

         F.  Cable manufacturer, cable type (buffer/ribbon), fiber type, cable
             reel number, number of fibers, number of fibers per tube, and
             distance of each section of cable between splice points.

         G.  Final pigtail OTDR test data

7. General Testing Procedures and Delivery of Test Results

         A. If Williams Communications Fiber Acceptance Testing of a Selected
Segment begins prior to the twentieth (20th) day after the Effective Date, then
Williams Communications shall provide Lessee with a copy of the test
deliverables on a Segment-by-Segment basis by twenty (20) calendar days after
the later of (i) the conclusion of such Fiber Acceptance Testing of a Segment or
(ii) the Effective Date.

         B. If Williams Communications Fiber Acceptance Testing begins on or
after the twentieth (20th) day after the Effective Date, the provisions of this
subsection shall apply. Williams Communications Fiber Acceptance Testing shall
progress Segment by Segment along the Route as cable splicing progresses, so
that test deliverables may be reviewed in a timely manner. Lessee shall have the
right, but not the obligation, to have an individual present to observe the
Fiber Acceptance Testing. Within twenty (20) calendar days after the conclusion
of any Fiber Acceptance Testing of the Lessee Fibers conducted by Williams
Communications in any given Segment, Williams Communications shall provide
Lessee with a copy of the test deliverables.

         C. Williams Communications shall, upon written request, provide Lessee
with its testing schedule for any Segment promptly after developing such
schedule.

Exhibit A - Page 7
<PAGE>

8. Lessee Testing

The following procedures shall apply to Lessee testing:

         A. If Williams Communications' Fiber Acceptance Testing begins on or
after the twentieth (20th) day after the Effective Date, Lessee may perform its
own concurrent Fiber Acceptance Testing of the Lessee Fibers at the same time
Williams Communications performs testing at each location. If Lessee elects to
perform such testing, it shall notify Williams Communications of its intent to
do so no later than ten (10) days after the Effective Date. The parties shall
cooperate to facilitate such separate, but concurrent, Fiber Acceptance Testing,
provided that the Lessee shall conform to Williams Communications testing
schedule.

         B. If Williams Communications Fiber Acceptance Testing begins prior to
the twentieth (20th) day after the Effective Date, or if Lessee does not elect
to perform concurrent testing pursuant to Subsection 8.A of this Exhibit, Lessee
may perform its own Fiber Acceptance Testing of the Lessee Fibers after Williams
Communications Fiber Acceptance Testing begins. Lessee shall provide Williams
Communications at least seven (7) days' prior notice of Lessee's testing
schedule. Williams Communications shall have the right, but not the obligation,
to have an individual present to observe Lessee's Fiber Acceptance Testing.

         C. Within twenty (20) calendar days after the conclusion of any Fiber
Acceptance Testing of the Lessee Fibers conducted by Lessee in any given
Segment, the Lessee shall notify Williams Communications of any detected
failures to meet the specifications set forth in Section 2 of this Exhibit. The
Lessee's exercise or non-exercise of its right to conduct Fiber Acceptance
Testing pursuant shall not extend or shorten the time periods for Lessee to
determine, pursuant to the Agreement, if the Fibers meet the Acceptance
Standards.

         D. The Lessee must notify Williams Communications of its intent to
perform acceptance testing within 10 calendar days following the later of the
date it receives notification of route completion or the date it receives the
results of Final Acceptance Testing.

Exhibit A - Page 8
<PAGE>

<Table>
<Caption>
                                                              EXHIBIT B
                                                            LESSEE FIBERS
------------------------------------------------------------------------------------------------------------------------------------
                               MFN ACCEPTANCE               NO. OF FIBERS  FIBER ROUTE MILES    RATE PER      MONTHLY LEASE PER
     ROUTE SEGMENTS                 DATE       ROUTE MILES    PER ROUTE        ACCEPTED        FIBER MILE          ROUTE
------------------------------------------------------------------------------------------------------------------------------------
<S>                            <C>              <C>          <C>          <C>                <C>            <C>

Atlanta to Nashville              04/24/00          200          2               400         [**********]    [*********************]

Atlanta to Jacksonville           06/15/00          350          2               700         [**********]    [*********************]

Atlanta to Washington, DC         05/24/00          820          2              1640         [**********]    [*********************]

Boston to Albany                  09/27/00          180          2               360         [**********]    [*********************]

Chicago to Cleveland              09/21/01          500          2              1000         [**********]    [*********************]

Cincinnati to Chicago             01/08/01          440          2               880         [**********]    [*********************]

Nashville to Cincinnati           01/08/01          210          2               420         [**********]    [*********************]

Cleveland to New York             06/05/01          760          2              1520         [**********]    [*********************]

Dallas to Kansas City             11/27/00          690          2              1380         [**********]    [*********************]

Daytona Beach to Tampa            02/01/00          160          2               320         [**********]    [*********************]

Denver to Salt Lake City          03/28/00          400          2               800         [**********]    [*********************]

Houston to Dallas 1               05/26/00          250          2               500         [**********]    [*********************]

Houston to Atlanta 1              05/26/00         1000          2              2000         [**********]    [*********************]

Jacksonville to Miami             07/05/00          332          2               664         [**********]    [*********************]

Kansas City to Denver             12/13/99          610          2              1220         [**********]    [*********************]

St. Louis to Chicago              06/08/01          313          2               626         [**********]    [*********************]

Kansas City to St. Louis          06/04/01          427          2               854         [**********]    [*********************]

Los Angeles to San Diego          05/23/01          200          2               400         [**********]    [*********************]

Minneapolis to Kansas City        12/13/99          500          2              1000         [**********]    [*********************]

New Orleans to Tallahassee        03/28/00          400          2               800         [**********]    [*********************]

Phoenix to Houston                11/11/00         1200          2              2400         [**********]    [*********************]

Portland to Sacramento            06/12/01          700          2              1400         [**********]    [*********************]

Sacramento to Los Angeles         11/28/01          750          2              1500         [**********]    [*********************]

Sacramento to Salt Lake City      12/18/00          630          2              1260         [**********]    [*********************]

Sacramento To San Francisco       03/23/01          100          2               200         [**********]    [*********************]

San Diego to Phoenix              02/26/01          350          2               700         [**********]    [*********************]

San Francisco to Santa Clara      02/16/01          56           2               112         [**********]    [*********************]

Seattle to Portland               10/28/01          250          2               500         [**********]    [*********************]

Tallahassee to Miami              05/24/00          580          2              1160         [**********]    [*********************]

Santa Clara to Modesto            07/24/01          142          2               284         [**********]    [*********************]

                      TOTALS                                                  27,000                         [*********************]
                                                  13,500
</Table>

Exhibit B - Page 1
<PAGE>

                            MFN LEASED FIBER NETWORK

                                     (MAP)

Exhibit B - Page 2

<PAGE>

<Table>
<Caption>
                                                     EXHIBIT C
                                                     BUILDINGS
--------------------------------------------------------------------------------------------------------------------
                                                         POP
SELECTED SEGMENT                                      LOCATIONS      TRANSMISSION SITE LOCATIONS
--------------------------------------------------------------------------------------------------------------------
<S>                                                  <C>             <C>

ATLN - WASH

ATLANTA, GA                                           ATLANTA POP -  874 DEKALB AVENUE, ATLANTA, GA 30307

Lawrenceville                                                        790 Mcart Rd., Lawrenceville, GA 30245

Athens (a\k\a Hull)                                                  920 Smith Road, Hull, GA 30646

Hartwell                                                             4260 Liberty Mill Rd., Hartwell, GA 30643

Greenville                                                           9744 Augusta Rd., Greenville, SC 29669

SPARTANBURG, SC                                       SPARTANBURG POP - BTC BUILDING, 145 N. CHURCH ST., SUITE 3,
                                                      SPARTANBURG, SC 29306

York                                                                 2154 Templeton Rd., Clover, SC 29710

CHARLOTTE, NC                                         CHARLOTTE POP - 112 N. MEYERS ST., CHARLOTTE, NC 28202

Salisbury (a\k\a Mt. Ulla)                                           295 Upright Rd., Mt. Ulla, NC 28125

Kernersville Jct.                                                    LOT #51M, 1334 Old Salem Road, Kernersville,
                                                                     NC 27284

SPUR TO GREENSBORO & RALEIGH, NC

GREENSBORO, NC                                        GREENSBORO POP - SOUTH ELM CENTER, 201-E CREEK RIDGE ROAD,
                                                      GREENSBORO, NC 27406

Chapel Hill                                                          6102 Old Greensboro Rd., Chapel Hill, NC 27516

RALEIGH, NC                                           RALEIGH POP - 3440 TARHEEL DRIVE, BLDG. #3, SUITE 105,
                                                      RALEIGH, NC 27609

Reidsville                                                           1301 Ashley Loop, Reidsville, NC 27320

Chatham                                                              945 Transco Rd., Chatham, VA 24531

Appomattox                                                           Hwy. 691 SW, Appomattox, VA 24522

Scottsville Jct.                                                     Highway 643, Scottsville, VA 24590

SPUR TO RICHMOND, VA

Goochland                                                            3901 River Rd. West, Goochland, VA 23063

RICHMOND, VA                                          RICHMOND POP - 3600 W. BROAD ST., SUITE 472, RICHMOND, VA
                                                      23230
Unionville                                                           74444 Everona Rd., Unionville, VA 22587

Manassas                                                             10699 Piperlane, Manassas, VA 20110

WASHINGTON, DC                                        WASHINGTON DC POP - 1220 L ST. NW, SUITE 200, WASHINGTON, DC
                                                      20005

--------------------------------------------------------------------------------------------------------------------

HSTN - DLLS (IXC)

HOUSTON, TX                                           HOUSTON POP - 1124 HARDY STREET, HOUSTON, TX 77020

Richey Road                                                          300 Richey Road, Houston TX, 77020

Willis (a\k\a Montgomery Co.)                                        16533 IH 45 NORTH, Willis, TX 77378

Madison                                                              Route 2, Box 213, Madisonville, TX 77864

Buffalo                                                              23433 IH 45 North, Buffalo, TX 75831

Streetman                                                            16108 IH 45 North, Streetman, TX 75859
</Table>

Exhibit C - Page 1
<PAGE>

<Table>
<S>                                                   <C>            <C>
Ennis                                                                3910 IH 45 North, Ennis, TX 75120

DALLAS, TX                                            DALLAS POP - ONE MAIN PLACE, 1201 MAIN STREET, SUITE C-112
                                                      DALLAS, TX 75202

KSCY - DNVR

KANSAS CITY, MO                                       KANSAS CITY POP - THE BRYANT BLDG., 1102 GRAND AVE. #300,
                                                      KANSAS CITY, MO 64106

Lawrence                                                             13804 246th St., Lawrence, KS 66044

TOPEKA, KS                                            TOPEKA POP - 101 SE MONROE, TOPEKA, KS 66603

Allen (a\k\a Miller)                                                 1836 County Rd. 330, Osage City, KS 66868

Elmdale                                                              RR 1, Elmdale, Cottonwood Falls, KS 66850

Newton                                                               937 Falcon Road, Newton, KS 67114

Inman                                                                380 Plum Ave., Inman, KS 67546

Ellinwood                                                            1150 E BARTON CO. ROAD, Ellinwood, KS 67526

Bison                                                                Rural Rt. 1, Bison, KS 67520

Ellis                                                                Rural Rt. 1, Ellis, KS 67637

Grainfield                                                           1102 COUNTY ROAD 50, Grainfield, KS 67737

Oakley (a\k\a Monument)                                              2317 Daydream Road, Monument, KS 67747

Goodland                                                             5655 County Road #16, Goodland, KS 67735

Burlington (a\k\a Bethune)                                           32353 County Rd. 40, Burlington, CO 80805

Flagler                                                              7250 County Rd. HH, Flagler, CO 80815

Woodrow                                                              1018 HIGHWAY 71, Woodrow, CO 80757

Strasburg                                                            2598 S County Rd., 157, Strasburg, CO 80136

DENVER, CO                                            910 15TH ST., SUITE 716, DENVER, CO 80202

--------------------------------------------------------------------------------------------------------------------

LSAN - SNDG

LOS ANGELES, CA                                       ONE WILSHIRE BLDG., 624 SOUTH GRAND, SUITE 1706, LOS
                                                      ANGELES, CA 90017

Pomona                                                               1800 Mt Vernon Ave., Pomona, CA 91768

RIVERSIDE, CA                                         RIVERSIDE POP - 1550 MALBOROUGH AVE., RIVERSIDE, CA 92507

Lindenberger                                                         29801 Scott Road, Sun City, CA 92584

Escondido                                                            1747 South Escondido Blvd., Escondido, CA
                                                                     92025

SAN DIEGO, CA                                         KEARNEY MESA COMPLEX, 8923 COMPLEX DRIVE, SAN DIEGO, CA 92123

--------------------------------------------------------------------------------------------------------------------

SNDG - PHNX

SAN DIEGO, CA                                         KEARNEY MESA COMPLEX, 8923 COMPLEX DRIVE, SAN DIEGO, CA 92123

Oceanside                                                            1806 Missions Ave., Oceanside, CA 92507

Laguna Nigel                                                         2734 Camino Capistrano, Ste. 157, Laguna
                                                                     Nigel, CA 92677
</Table>

Exhibit C - Page 2
<PAGE>

<Table>
<S>                                                   <C>            <C>
RIVERSIDE, CA                                         RIVERSIDE POP - 1550 MALBOROUGH AVE., RIVERSIDE, CA 92507

Banning                                                              2010 E. Westward Ave, Banning, CA 92220

Indio                                                                46501 Wheel Road, Indio, CA 92201

Mortmar (a\k\a Mecca)                                                99815 Hwy 111, Mecca, CA 92254

Flowing Well (a\k\a Niland)                                          7835 E. Noffsinger Rd., Niland, CA 92257

Ogillay (a\k\a Winterhaven & Sidewinder)                             672 Sidewinder Rd. Winterhaven, CA 92283

Ligurta                                                              10045 S. Avenue 20 3/4, Ligurta, AZ 85356

Growler                                                              283 N. Avenue 49E, Roll, AZ 85347

Hyder (a\k\a Agua Caliente)                                          43603 South Agua Caliente, Agua Caliente, AZ
                                                                     85333

Palo Verde                                                           8416 S. 299th Ave, Palo Verde, AZ 85343

PHOENIX, AZ                                           PHOENIX POP - 17 E. VIRGINIA, PHOENIX, AZ 85004

--------------------------------------------------------------------------------------------------------------------

PTLD - SCRM

PORTLAND, OR                                          PORTLAND POP - 707 SW WASHINGTON ST., 4TH FL., SUITE 410,
                                                      PORTLAND, OR 97205

Salem                                                                1244 Howell Praire Road NE, Salem, OR 97301

Shedd                                                                Boston Mill Road & Seven Mile Lane, Shedd, OR
                                                                     97377

Jasper (a\k\a Springfield)                                           37385 Jasper Lowell Road, Jasper, OR 97438

Oakridge                                                             N. Fish Hatchery Road & Hwy 58, Oakridge, OR
                                                                     97463

Chemult                                                              Hwy 97 South, Btwn Chalet and Featerbed 1,
                                                                     Chemult, OR 97731

Chiloquin                                                            Hwy 97 South & 1st road North of Hwy 62,
                                                                     Chiloquin, OR 97624

S. Kalamath                                                          SW Corner of Keller Road & Hwy 39, Kalamath
                                                                     Falls, OR 97624

Tionesta                                                             CR 97 & Gravel Plant Road, Alturas, CA 96015

Fall River Valley                                                    Red Mountain Road @ Brown Road, Fall River
                                                                     Mills, CA 96028

Oak Run                                                              North on Oak Run to Fern Road, Oak Run, CA
                                                                     96069

Red Bluff                                                            Baker Road North of Pymire on Eastside of
                                                                     Road, Red Bluff, CA 96080

S. Chico                                                             Tokay Ranch Road, Chico, CA 95973

Biggs                                                                3951 Farris Road @ B. Gridley Road, Biggs, CA
                                                                     95917

Robbins                                                              Sacramento Valley Road @ SR 113, Robbins, CA
                                                                     95645

SACRAMENTO, CA                                        SACRAMENTO POP II - 770 L. ST., SUITE 120, SACRAMENTO, CA
                                                      95814

--------------------------------------------------------------------------------------------------------------------

SCRM - LSAN

SACRAMENTO, CA                                        SACRAMENTO POP II - 1005 'B' ST., SUITE 120, SACRAMENTO, CA
                                                      95814
</Table>

Exhibit C - Page 3

<PAGE>

<Table>
<S>                                                   <C>            <C>
Herald                                                               13368 Alta Mesa Road, Herald, CA 95638

Stockton                                                             3105-3139 E Carpenter Road, Stockton, CA 95205

MODESTO, CA                                           MODESTO POP - 1224 13TH ST., MODESTO, CA 95354

Winton (a\k\a Merced)                                                3291 W. Bellevue Road, Merced, CA 95348

Madera (a\k\a Chowchilla)                                            Adjacent to 24311 Santa Fe Drive, Chowchilla,
                                                                     CA 93610

FRESNO, CA                                            FRESNO POP - 364 W. FALLBROOK AVENUE, FRESNO, CA 93711

Dinuba                                                               40063 Road 56 - Route 23 East, Dinuba, CA
                                                                     93618

Tulare                                                               739 N. Oaks Street, Tulare, CA 93274

Delano                                                               11094 Browning Road, Delano, CA 93215

BAKERSFIELD, CA                                       BAKERSFIELD POP - 2020 P STREET BAKERSFIELD, CA 93301

Arvin                                                                A35947 Comanche Point Road, Arvin, CA 93203

Tehachapi                                                            11253 Tehachapi Willow Springs Road, Mojave,
                                                                     CA 93501

Palmdale                                                             17th Street East @ East Q Ave., Palmdale, CA
                                                                     93350

Adelanto                                                             19402 Koala Rd., Adelanto, CA 92301

Ontario                                                              350 S. Milliken, Ste O & P, Ontario, CA 91761

LOS ANGELES, CA                                       LOS ANGELES POP - ONE WILSHIRE BLDG., 624 SOUTH GRAND, SUITE
                                                      1706, LOS ANGELES, CA 90017

-----------------------------------------------------------------------------------------------------------------------

PHNX - HSTN

PHOENIX, AZ                                           PHOENIX POP - 17 E. VIRGINIA, PHOENIX, AZ 85004

Queen Creek (a\k\a Florence)                                         6268 E. Heritage Road, Florence, AZ 35242

Red Rock                                                             22640 E. Camino Adelante, Red Rock, AZ 85245

TUCSON, AZ                                            TUCSON POP - 135 & 139 NORTH 6TH AVE., TUCSON, AZ 85701

Mescal (a\k\a Benson)                                                3153 Train Track Road, Benson, AZ 85602

Dragoon                                                              4846 E. Dragoon Road, Dragoon, AZ 85609

Luzena (a\k\a Bowie)                                                 2403 W. Luzena Road, Bowie, AZ 85606

Road Forks                                                           390 Union Trail, Road Forks, NM 88045

Separ (a\k\a Silver City)                                            4261 Separ Road, Silver City, NM 88061

Carne (a\k\a Deming)                                                 11485 Mundo Road NE, Deming, NM 88030

Afton (a\k\a Las Cruces)                                             9500 County Road, B004, Las Cruces, NM 88005

EL PASO, TX                                           EL PASO POP - 501 W. OVERLAND AVENUE, EL PASO, TX 79901

Tornillo (a\k\a Fabens)                                              19750 Alameda Avenue, Fabens, TX 79853

Ft. Hancock                                                          1291 Lasca Road, Ft. Hancock, TX 79839

Van Horn                                                             428 Fuest Ranch; 144163 I-10, Van Horn, TX
                                                                     79855

Valentine                                                            14338 US Hwy 90, Valentine, TX 79854
</Table>

Exhibit C - Page 4
<PAGE>

<Table>
<S>                                                   <C>            <C>
Marfa                                                                1500 W. San Antonio, Marfa, RX 79843

Alpine                                                               22313 US Hwy 90, Alpine, TX 79830

Marathon                                                             26372 US Hwy 90, Marathon, TX 79842

Sanderson                                                            538 E. Hwy 90, Sanderson, RX 79848

Langtry                                                              4297 E. Hwy 90, Langtry, TX 78871

Comstock                                                             33838 US Hwy 90 W, Comstock, TX 78837

Del Rio                                                              4256 US Hwy 90 E, Del Rio, TX 78841

Bracketville                                                         15402 US Hwy 90 E, Bracketville, TTX 78832

Sabinal                                                              61 C.R. 305 Knippa, Sabinal, TX 78870

Hondo                                                                3280 C.R. 4514, Hondo, TX 78861

SAN ANTONIO, TX                                       SAN ANTONIO POP - 1203 N. FRIO STREET, SAN ANTONIO, TX, 78207

Kingsbury                                                            3004 FM 1104, Kingsbury, TX 78838

AUSTIN, TX                                            AUSTIN POP - 500 CHICON STREET, AUSTIN, TX 78702

Giddings (a\k\a McDade)                                              2230 Hwy 290 E, McDade, TX 78650

Brenham                                                              55 Wildflower Road, Brenham, TX 77833

Waller                                                               20805 FM 362, Waller, TX 77484

HOUSTON, TX                                           HOUSTON POP - 1124 HARDY STREET, HOUSTON, TX 77020

------------------------------------------------------------------------------------------------------------------------

BSTN - ALBY

BOSTON, MA                                            BOSTON POP - ONE SUMMER STREET, 6TH FLOOR, BOSTON, MA 02110

WORCESTER, MA                                         WORCHESTER POP - 474 MAIN STREET, WORCESTER, MA 01608

SPRINGFIELD, MA                                       SPRINGFIELD POP - ONE FEDERAL STREET, 6TH FLOOR,
                                                      SPRINGFIELD, MA 01105

Lee                                                                  250 West Road, North of Service Plaza, Lee,
                                                                     MA 01238

ALBANY, NY                                            ALBANY POP - 194 WASHINGTON AVE., 5TH FL., SUITE 502,
                                                      ALBANY, NY 12210

------------------------------------------------------------------------------------------------------------------------

SCRM - SLKC

SACRAMENTO, CA                                        SACRAMENTO POP II - 1005 'B' ST., SUITE 120, SACRAMENTO, CA
                                                      95814

Auburn Alt.                                                          1725 Auburn Ravine Road, Auburn, CA 95603

Blue Canyon                                                          Blue Canyon Exit off I-80, Blue Canyon, CA
                                                                     95714

Truckee                                                              10136 Hirshdale Road, Truckee, CA 96161

RENO, NV                                              RENO POP - 220 GARDNER ST., RENO, NV 89503

Hot Springs Flat (a\k\a Fallon)                                      Exit 65 off I-80, Nightingale Rd., Fallon, NV 89406

Lovelock                                                             55 Cornell Avenue, Lovelock, NV 89419

Mill City (a\k\a Imlay)                                              Exit 149 on I-80, Lot 14, Block B Mill City
                                                                     Acres, Imlay, NV 89418

Golconda Butte (a\k\a Winnemucca)                                    Exit 187 off I-80, North of interchange,
                                                                     Winnemucca, NV 89445
</Table>

Exhibit C - Page 5
<PAGE>

<Table>
<S>                                                   <C>            <C>
Snow Gulch                                                           Exit 222 off I-80, 1.9 miles North of Access,
                                                                     Snow Gulch, NV 89444

Dunphy (a\k\a Eureka)                                                Exit 254 off I-80 North, East 3.5 miles,
                                                                     Eureka, NV 89821

Hunter (a\k\a McGill)                                                Exit 292 off I-80, North of intersection,
                                                                     then East, McGill, NV 89318

Deeth (a\k\a Elko)                                                   Exit 333 off I-80, 5 miles East on North
                                                                     Frontage Rd, Elko, NV 89835

Oasis                                                                Exit 380 off I-80, Oasis, NV 89830

Wendover                                                             3131 East Frontage Road, Wendover, UT 84083

Barrow                                                               9.5 miles West of I-80, Barro, UT 84083

Timpie (a\k\a Tooele)                                                15516 West Rowley Road, Tooele, UT 84022

SALT LAKE CITY, UT                                    SALT LAKE CITY POP - 5035 HAROLD GATTY DRIVE, SALT LAKE
                                                      CITY, UT 84116

----------------------------------------------------------------------------------------------------------------------

HSTN - ATLN

HOUSTON, TX                                           1124 HARDY STREET, HOUSTON, TX 77020

Kingwood (a\k\a Huffman or Harris)                                   33902 Huffman-Cleveland R, Huffman, TX 77336

Sour Lake (a\k\a Hardin)                                             29979 Highway 105, Sour Lake, TX 77659

Buna (a\k\a Jasper)                                                  Hwy 62 South, Buna, TX 77612

Ragley (a\k\a Beauregard)                                            17329 Hwy 171 North, Ragley, LA 70657

Basile (a\k\a Evangeline)                                            1919 Hunter Rd., Basile, LA 70515

Port Barre (a\k\a St. Landre or Washington)                          2343 Highway 359, Washington, LA 70589

Zachary Jct. (a\k\a Feliciana or Jackson)                            1479 A Highway 964, Jackson, LA 70748

SPUR TO NEW ORLEANS, LA

BATON ROUGE, LA                                       BATON ROUGE POP - 445 N. BLVD., SUITE 600, BATON ROUGE, LA
                                                      70802

Reserve (a\k\a Gramercy or Garyville)                                5599 Airline Highway, Garyville, LA 70084

NEW ORLEANS, LA                                       NEW ORLEANS POP - 639 LOYOLA AVE., SUITE 2020, NEW ORLEANS,
                                                      LA 70113
Greensburg (a\k\a St. Helena)                                        Hwy 43 North, Greensburg, LA 70441

Tylertown (a\k\a Walthall)                                           967 Hwy 583, Tylertown, MS 39667

Seminary (a\k\a Covington Co.)                                       11 Kelly Creek Road, Seminary, MS 39479

SPUR TO JACKSON, MS

Mendenhall                                                           3498 Simpson, Hwy 49, Mendenhall, MS 39114

JACKSON, MS                                           JACKSON POP - CAPITOL BLDG, 111 E. CAPITOL ST. SUITE 248,
                                                      JACKSON, MS 39201

Laurel (a\k\a Jasper or Sandersville)                                1666 Bonner Road, Sandersville, MS 39477

Quitman (a\k\a Jasper Co.)                                           240 Vyvx Lane, Quitman, MS 39955

Linden (a\k\a Merengo or Sweetwater)                                 Hwy 69 South, Sweetwater, AL 36782

Selma (a\k\a Dallas Co. or Browns)                                   1713 County Road 179, Browns, AL 36724

Clanton (a\k\a Chilton or Billingsley)                               4521 Chilton Road #352, Billingsley, AL 36006

SPUR TO BIRMINGHAM, AL
</Table>

Exhibit C - Page 6
<PAGE>

<Table>
<S>                                                   <C>            <C>

Calera                                                               157 County Road 95, Calera, AL 35041

BIRMINGHAM, AL                                        BIRMINGHAM POP - 2001 PARK PLACE TOWERS NORTH, SUITE
                                                      102,BIRMINGHAM, AL 35203

Alexander City (a\k\a Coosa or Kellyton)                             250 Highway 9, Kellyton, AL 35089

Wadley (a\k\a Randolph Co.)                                          1140 County Rd 41, Wadley, AL 36276

Newnan (a\k\a Coweta Co.)                                            65 Mayo Royal Road, Newnan, GA 30263

ATLANTA, GA                                           ATLANTA POP - 874 DEKALB AVENUE, ATLANTA, GA 30307

-------------------------------------------------------------------------------------------------------------------------

ATLN - JCVL

ATLANTA, GA                                           ATLANTA POP - 874 DEKALB AVENUE, ATLANTA, GA 30307

Covington                                                            10816 Old Atlanta Highway, Covington, GA 30014

Monticello                                                           8036 Highway 11 South, Monticello, GA 31064

MACON, GA                                             MACON POP - CHARTER MEDICAL BLDG., 577 MULBERRY ST., SUITE
                                                      175, MACON, GA 31201

Montrose                                                             4060 Highway 80 W, Montrose, GA 31065

Alamo                                                                Route 1 Box 304, Alamo, GA 30411

Baxley                                                               544 Buckhorn Road NE, Baxley, GA 31513

Patterson                                                            5860 North Campus Road, Patterson, GA 31557

Folkston                                                             Route 1 Box 845, Folkston, GA 31537

JACKSONVILLE, FL                                      JACKSONVILLE POP - 608 W. ADAMS ST., JACKSONVILLE, FL 32204

-------------------------------------------------------------------------------------------------------------------------

MPLS - KSCY

MINNEAPOLIS, MN                                       MINNEAPOLIS POP - 511 11TH AVE. SOUTH, SUITE 201,
                                                      MINNEAPOLIS, MN

Northfield                                                           6730 320th Street West, Northfield, MN 55057

Owantonna (a\k\a Hope)                                               6391 SW 68th Street, Owantonna, MN 55060

Hanlon Town (a\k\a Tenold)                                           807 435th Street, Hanlon Town, IA 50444

Latimer                                                              1825 Finch Avenue, latimer, IA 50452

Roland                                                               12951 610th Avenue, Roland, IA 50236

DES MOINES, IA                                        DES MOINES POP - 4500B CARLISLE ROAD, DES MOINES, IA 50317

Osceola                                                              2241-B US Highway 69, Osceola, IA 50213

Ridgeway                                                             20469 W. 230th Place, Ridgeway, MO 64481

Maysville (a\k\a Weathersby)                                         99 Southeast Dallas Road, Weathersby, MO 64497

Plattsburgh (a\k\a Lilly)                                            2821 Southwest Street, Plattsburg, MO 64497

KANSAS CITY, MO                                       KANSAS CITY POP - THE BRYANT BLDG., 1102 GRAND AVE. #300,
                                                      KANSAS CITY, MO 64106

-------------------------------------------------------------------------------------------------------------------------

JCVL - MIAM

JACKSONVILLE, FL                                      JACKSONVILLE POP - 608 W. ADAMS ST., JACKSONVILLE, FL 32204

St. Augustine Beach                                                  302 State Road 206 West, St. Augustine, FL
                                                                     32086
</Table>

Exhibit C - Page 7
<PAGE>

<Table>
<S>                                                   <C>            <C>
DAYTONA BEACH, FL                                     DAYTONA BEACH POP - 111 N. SEAGRAVE, DAYTONA BEACH, FL 32114

Titusville                                                           2002 Parish Road, Titusville, FL 32796

MELBOURNE, FL                                         MELBOURNE POP - 1110 LINE STREET, MELBOURNE, FL 32901

Vero Beach                                                           2108 Old Dixie Highway SE, Vero Beach, FL
                                                                     32962

Stuart                                                               4537 SE Commerce Avenue, Stuart, FL, 34997

WEST PALM BEACH, FL                                   WEST PALM BEACH POP - 410 HAMPTON RD., WEST PALM BEACH, FL
                                                      33405

FT. LAUDERDALE, FL                                    FT. LAUDERDALE POP - 220 NW 2ND ST., FT. LAUDERDALE, FL 33311

MIAMI, FL                                             MIAMI POP II - 200 SE 1ST STREET, MIAMI, FL 33131

------------------------------------------------------------------------------------------------------------------------

TLHS - MIAM

TALLAHASSEE, FL                                       TALLAHASSEE POP - 1416 S. ADAMS, TALLAHASSEE, FL 32301

Perry (a\k\a Taylor Co. or Iddo)                                     10000 N US 19, Iddo, FL 32347

Cross City (a\k\a Taylor Co. or Tennille)                            23076 S US 19, Cross City, FL 32647

Chiefland (a\k\a Levy Co.)                                           606 S Main St., Chiefland, FL 32626

Crystal River (a\k\a Citrus Co. or Red Level)                        6584 Sun Coast Blvd., Crystal River, FL 34428

Brooksville (a\k\a Hernando Co. or Garden Grove)                     20032 Powell Road, Brooksville, FL 34609

TAMPA, FL                                             TAMPA POP - 1700 N. 25TH, TAMPA, FL 33605

Wimauma (a\k\a Lithia or Ft. Lonesome)                               12225 State Road 674, Lithia, FL 33547

Zolfo Springs (a\k\a Hardee Co. or Ona)                              205 S CR 663, Zolfo Springs, FL 33865

Arcadia (a\k\a Desoto Co.)                                           12721 SE CR 763, Arcadia, FL 34266

FT. MYERS, FL                                         FT.  MYERS POP - 1547 SEABOARD, FT. MYERS, FL 33916

Labelle (a\k\a Hendry Co. or Goodno)                                 4331 SR 80 East, LaBelle, FL 33935

Belle Glade (a\k\a Palm Beach Co.)                                   5115 US 27, Belle Glade, FL 33430

Weston (a\k\a Broward Co.)                                           2002 SW 26th Street, Weston, FL 33326

MIAMI, FL                                             MIAMI POP II - 200 SE 1ST STREET., MIAMI, FL 33131

------------------------------------------------------------------------------------------------------------------------

NWOR - TLHS

NEW ORLEANS, LA                                       NEW ORLEANS POP - POYDROUS PLAZA, 639 LOYOLA AVE, SUITE
                                                      2020, NEW ORLEANS, LA 70113

Slidell                                                              46532 Highway 90, Slidell, LA 70461

Pass Christian                                                       13343 Cable Bridge Road, Pass Christian, MS
                                                                     39571

Van Cleave                                                           11151 Oneal Road, Van Cleave, MS 39565

Miller Creek                                                         3735 Newman Road, Mobile, AL 36695

MOBILE, AL                                            MOBILE POP - 50 N LAWRENCE STREET, MOBILE, AL 36602

Robertsdale                                                          22154 US Highway 90, Robertsdale, AL 36695

PENSACOLA, FL                                         PENSACOLA POP - 221 N. BAYLEN STREET, PENSACOLA, FL 32501

Milton                                                               10955 Highway 90, Milton, FL 32583
</Table>

Exhibit C - Page 8
<PAGE>

<Table>
<S>                                                   <C>            <C>
DeFuniak Springs                                                     35 Wells Street, Defuniak Springs, FL 32433

Free Port (a\k\a Ponce De Leon)                                      9926 State Highway 90, Ponce De Leon, FL 32455

Youngstown (a\k\a Juniper Creek)                                     12440 E. Highway 20, Juniper Creek, FL 32466

Hosford (a\k\a Harold)                                               West of Hwy 65 on Hwy 20, Harold, FL 32334

TALLAHASSEE, FL                                       TALLAHASSEE POP - 1416 S. ADAMS, TALLAHASSEE, FL 32301

---------------------------------------------------------------------------------------------------------------------

SCRM - SNFC

SACRAMENTO, CA                                        SACRAMENTO POP II - 1005 'B' STREET, SACRAMENTO, CA 95814

Bay Point                                                            487 Canal Road, Bay Point, CA 94565

Creed                                                                6732 Creed Road, Suisin City, 94585

OAKLAND, CA                                           OAKLAND POP - 1330 BROADWAY, OAKLAND, CA 94612

SAN FRANCISCO, CA                                     SAN FRANCISCO POP - 200 PAUL ST., 4TH FLOOR, SAN FRANCISCO,
                                                      CA 94124

---------------------------------------------------------------------------------------------------------------------

SNFC - SNTC

SAN FRANCISCO, CA                                     200 PAUL ST., 4TH FL., SAN FRANCISCO, CA 94124

SANTA CLARA, CA                                       SANTA CLARA POP - 3045 RAYMOND STREET, SANTA CLARA, CA 95054

---------------------------------------------------------------------------------------------------------------------

SNTC - MDST

SANTA CLARA, CA                                       SANTA CLARA POP - 3045 RAYMOND STREET, SANTA CLARA, CA 94536

Freemont                                                             37975 Shinn Road, Freemont, CA 94536

Tracey                                                               11660 W. Lime Road, Tracey, CA  95354

MODESTO, CA                                           MODESTO POP - 1224 13TH STREET, MODESTO, CA 95354

---------------------------------------------------------------------------------------------------------------------

DNVR - SLKC

DENVER, CO                                            DENVER, CO POP - 910 15TH ST., SUITE 716, DENVER, CO 80202

Platteville                                                          350 Front Street, Platteville, CO 80651

Nunn                                                                 13485 Weld County Road 108, Nunn, CO 80648

Remount                                                              310 Road 206, Granite Canyon, WY 80259

West Laramie                                                         824 Herrick Lane, Laramie, WY 82070

Wagonhound Creek                                                     3 miles North on SH 72, T21N, R81W, Sec 25, Elk
                                                                     Mountain, WY 82324

Sinclair                                                             6 miles South off Plant Road, T21N, R86W, Sec
                                                                     35, Sinclair, WY 92334

Echo Springs                                                         5.9 miles South on SH 789, Exit 187, T19N, R92W,
                                                                     Sec 3, Rawlins, WY 82301

Table Rock                                                           168 County Road 55, Table Rock Road, Table
                                                                     Rock, WY 82336
</Table>

Exhibit C - Page 9
<PAGE>

<Table>
<S>                                                   <C>            <C>

South Baxter                                                         740 County Road 30, South Baxter Road, South
                                                                     Baxter, WY 82901

Little America                                                       7 County Road 4-90, American Methanol Road,
                                                                     Green River, WY 82938

Fort Bridger                                                         3602 State Highway 412, Ft. Bridger, WY 82933

Hillard Flats                                                        14563 State Highway 150, Evanston, WY 82930

Wanship                                                              1779 South East Wanship Road, Coalville, UT
                                                                     84017

SALT LAKE CITY, UT                                    SALT LAKE CITY, UT POP - 5035 HAROLD GATTY DRIVE, SALT LAKE
                                                      CITY, UT 84116

-----------------------------------------------------------------------------------------------------------------------

STTL - PTLD

SEATTLE, WA                                           SEATTLE, WA POP - 1505 5TH AVENUE, SEATTLE, WA 98101

Kalama                                                               5420 Meeker Rd, Kalama, WA 98625

Cantraila                                                            1032 Centralia Alpha Rd., Chehalis, WA 98532

Payallup                                                             5308 187th St., Payallup, WA 98375

PORLAND, OR                                           PORTLAND, OR POP - 707 SW WASHINGTON ST., 4TH FL., SUITE
                                                      410, PORTLAND, OR 97205

-----------------------------------------------------------------------------------------------------------------------

DLLS - KSCY

DALLAS, TX                                            DALLAS, TX POP II - 400 S. AKARD, DALLAS, TX 75202

Denton                                                               5303 I-35 N., Denton, TX 76201

Thackerville                                                         Route 1, Box 37  (north on I-35 from Dallas
                                                                     to MP4), Marietta, OK 73459

Springer                                                             Route 3, Box 96-A, Springer, OK 73458

Byars                                                                Route 2, Box 37, Byars, OK 74831

Shawnee                                                              100 Garrett Lake Road, Shawnee, OK 74801

Drumright                                                            Route 1, Box 124-5, Drumright, OK 74030

TULSA, OK                                             TULSA, OK POP - 18 W. ARCHER, TULSA, OK 74103

Barnsdall                                                            Barnsdall E 11 & 123, Barnsdall, OK 74002

Tyro                                                                 SW 75 to 2700 Rd, Tyro, KS 67364

Chanute                                                              18535 Ford Road, Chanure, KS 66720

Selma Station                                                        32028 SW 700 Road, Kincaid, KS 66039

Springhill                                                           25000 Somerset Road, Springhill, KS 66083

KANSAS CITY, MO                                       KANSAS CITY, MO POP II - 1212 E. 19TH STREET, KANSAS CITY,
                                                      MO 6410

-----------------------------------------------------------------------------------------------------------------------

KSCY - CHCG

KANSAS CITY, MO                                       KANSAS CITY, MO POP II - 1212 E. 19TH STREET, KANSAS CITY,
                                                      MO 6410

Elm                                                                  14019 Hutt Rd, Lone Jack, MO 64070

Valley City                                                          849 NE 700 Rd, Knob Noster, MO 65336

Pilot Grove                                                          10425 HWY 135, Pilot Grove, MO 65276

COLUMBIA, MO                                          COLUMBIA, MO POP - 3320 FALLING LEAF LANE, COLUMBIA, MO 65201
</Table>

Exhibit C - Page 10
<PAGE>

<Table>
<S>                                                   <C>            <C>
Centrailia Station                                                   18035 Hwy DD, Centrailia, MO 65240

Buell                                                                1049 Hwy 161, Buell, MO 63361

Maryknoll                                                            3801 Dyer Rd, O'Fallon, MO 63366

ST. LOUIS, MO                                         THE VALLEY BLDG., 900 WALNUT STREET, SUITE 124, ST. LOUIS,
                                                      MO 63102

Worden                                                               9603 Brandt Road, Worden, IL 62097

Farmersville                                                         3012 Mack Tr, Waggoner, IL 62572

SPRINGFIELD, IL                                       SPRINGFIELD, IL POP - 1303 SOUTH 6TH STREET, SPRINGFIELD, IL
                                                      62703

Hartsburg                                                            849 1950 St, Hartsburg, IL 62656

Peoria                                                               112 West Camp Street, Peoria, IL 61611

Gridley                                                              21121 East North Road, Gridley, IL 61744

Dwight                                                               11870 South Dwight Road, Dwight, IL 60420

Plainfield                                                           15153 Southeast Frontage Road, Plainfield, IL
                                                                     60544

CHICAGO, IL                                           CHICAGO, IL POP II - 2101 ROBERTS DRIVE, MAYWOOD, IL 60153

------------------------------------------------------------------------------------------------------------------------

DYBH - TAMP

DAYTONA BEACH, FL - Orlando, FL                       DAYTONA BEACH, FL POP - 111 N. SEAGRAVE, DAYTONA BEACH, FL
                                                      32114

Osteen                                                               110 Collins Street, Sanford, FL 32754

ORLANDO, FL - TAMPA, FL                               ORLANDO, FL POP - 510 COLUMBIA ST., ORLANDO, FL 32805

Haines                                                               400 B Highway 17-92 South, Haines City, FL
                                                                     33837

Lakeland                                                             1075 Pine Chase Avenue, Lakeland, FL 33815

TAMPA, FL                                             TAMPA, FL POP - 1700 N. 25TH, TAMPA, FL 33605

------------------------------------------------------------------------------------------------------------------------

CLEV - NYCM

CLEVELAND, OH                                         CLEVELAND, OH POP - RF KEITH BLDG, 1621 EUCLID AVE., SUITE
                                                      522, CLEVELAND, OH 44115

Trumbull (a\k\a Montvile)                                            5175 Ireland Road, Hartsgrove, OH 44085

Conneaut (a\k\a Monroe)                                              4528 SR7 Center Road, Conneaut, OH 44030

Waterford (a\k\a Union City)                                         6758 Turner Road, Union City, PA 16438

Brockton (a\k\a Portland)                                            9409 Lake Avenue, Brockton, NY 14716

Angola (a\k\a North Collins)                                         12103 Gowanda State Road, Lawtons, NY 14091

West Senece (a\k\a Buffalo Jct.)                                     2447 Clinton Street, West Seneca, NY 14224

BUFFALO, NY                                           BUFFALO, NY POP - 325 DELAWARE AVE., 2ND FL., BUFFALO, NY
                                                      14202

Batavia                                                              8216 Kelsy Road, Batavia, NY 14020

ROCHESTER, NY                                         ROCHESTER, NY POP - ONE WEST MAIN ST., SUITE 610, ROCHESTER,
                                                      NY 14614

Henrietta (a\k\a Rochester Jct.)                                     10 Erie Station Road, West Henrietta, NY 14586

Waterloo                                                             1299 Stone Church Road, Waterloo, NY 13165
</Table>

Exhibit C - Page 11
<PAGE>

<Table>
<S>                                                   <C>            <C>
SYRACUSE, NY                                          SYRACUSE, NY POP - 2 CLINTON SQUARE, SUITE L-40, SYRACUSE,
                                                      NY 13202

Conastoata Jct.                                                      1067 Vine Street, Liverpool, NY 13088

Rome (a\k\a Oneida or Westmoreland)                                  5908 Lowell Road, Rome, NY 13440

Herkimer (a\k\a Llion or Danube)                                     2440 State Route 5-S, Herkimer, NY 13407

Westmere (a\k\a Florida)                                             1043 Langley Road, Amsterdam, NY 12010

Albany Jct.                                                          NYS Hwy Mile Post #142.3, Albany, NY 12210

ALBANY, NY                                            ALBANY, NY POP - 194 WASHINGTON AVE., 5TH FL, SUITE 502,
                                                      ALBANY, NY 12210

Albany Jct.                                                          99 Washington Street, Albany, NY 12210

Sugarties                                                            1185 King's Highway, Sugarties, NY 12477

New Paltz                                                            91 South Ohioville Road, New Paltz, NY 12561

Suffern (a\k\a Woodbury)                                             2 Pavillion Rd, Suffern, NY 10901

Dobbs Ferry (a\k\a Greensburg)                                       33 Old Jackson Ave., Dobbs Ferry, NY 10706

NEW YORK CITY, NY                                     NEW YORK CITY, NY POP 1 - 60 HUDSON ST, 12TH FLOOR, SUITE
                                                      1203, NEW YORK CITY, NY 10013

-----------------------------------------------------------------------------------------------------------------------

CHCG - CLEV

CHICAGO, IL (II)                                      CHICAGO, IL POP II - 2101 ROBERTS DRIVE, MAYWOOD, IL 60153

Glenwood                                                             19875 Blackstone Ave., Chicago Heights, IL
                                                                     60425

Chesterton                                                           1170 N County Road 400, Chesterton, IN 46304

SOUTH BEND, IN                                        SOUTH BEND, IN POP - 140 FRANKLIN, SOUTH BEND, IN 46601

Shishewana                                                           8210 W. US 20, Shipshewana, IN 46565

Angola                                                               112 W. Broad Street, Angola, IN 46703

Fayette                                                              14975 County Road 19, Fulton, OH 47885

TOLEDO, OH                                            TOLEDO, OH POP - 639 OLIVER ST., TOLEDO, OH 43609

Freemont                                                             864 County Road 212, Fremont, OH 43420

Vermillion                                                           5604 Coen Road, Vermillion, OH 44089

CLEVELAND, OH                                         CLEVELAND, OH POP - RF KEITH BLDG, 1621 EUCLID AVE., SUITE
                                                      522, CLEVELAND, OH 44115

-----------------------------------------------------------------------------------------------------------------------

ATLN - NSVL

ATLANTA, GA (II)                                      ATLANTA, GA POP (II) - 6855 CRESCENT DRIVE, NORCROSS, GA
                                                      30340

Douglasville                                                         1415 Municipal Parkway, Douglasville, GA 30134

Felton                                                               79 M Sanders Road, Buchanan, GA 30113

Rome                                                                 169 North Avenue, Northeast, Rome, GA 30165

Trion                                                                836 Ridgeway Road, Trion, GA 30753

CHATTANOOGA, TN                                       CHATTANOGA, TN POP - 1601 CENTRAL AVE., CHATTANOOGA, TN 37408

Jasper                                                               8489 Hwy 150, Oak Grove, TN 37347

Manchester                                                           38 Rigney Drive, Manchester, TN 37355
</Table>

Exhibit C - Page 12
<PAGE>

<Table>
<S>                                                   <C>            <C>
Murfresboro                                                          2829 Hwy 99, Murfreesboro, TN 37128

NASHVILLE, TN                                         NASHVILLE, TN POP - 2208 9TH AVE NORTH, NASHVILLE, TN 37204

-----------------------------------------------------------------------------------------------------------------------

NSVL - CNCN

NASHVILLE, TN                                         NASHVILLE, TN POP - 2208 9TH AVE NORTH, NASHVILLE, TN 37204

Portland                                                             5716 Hwy 31 W, Portland, TN 37148

Morgantown                                                           3543 Richland Church Rd, Morgantown, KY 42261

Whitesville                                                          7535 Stevens School Road, Whitesville, KY
                                                                     42378

Irvington                                                            605 Miller Road, Guston, KY 40142

LOUISVILLE, KY                                        LOUISVILLE, KY POP - 715 SOUTH 7TH ST., LOUISVILLE, KY 40202

Bedford                                                              469 Sulfur - Bedford Rd, Bedford, KY 40006

Dillsboro                                                            10620 Texas Gas Rd, Dillsboro, IN 47018

CINCINNATI, OH                                        CINCINNATI, OH POP - 1428 W. 8TH STREET, CINCINNATI, OH 45202

-----------------------------------------------------------------------------------------------------------------------

CNCN - CHCG

CINCINNATI, OH                                        CINCINNATI, OH POP - 1428 W. 8TH STREET, CINCINNATI, OH 45202

Brooksville                                                          6004 Riley Pike, Brooksville, IL 40712

Kinghtstown                                                          2753 1100 North, Lewisville, IN 47352

INDIANAPOLIS, IN                                      INDIANAPOLIS, IN POP - 720 KENTUCKY AVE., SUITE 2,
                                                      INDIANAPOLIS, IN 46225

Reagan                                                               2947 West 950 North, Lake Village, IN 46349

Chalmers                                                             64835 South 300 West, Chalmers, IN 47929

Moffit                                                               9067 North 900 West, Demotte, IN 46310

Glenwood                                                             19875 Blackstone Ave, Chicago Heights, IN
                                                                     60411

CHICAGO, IL                                           CHICAGO, IL POP II - 2101 ROBERTS DRIVE, MAYWOOD, IL 60153

-----------------------------------------------------------------------------------------------------------------------
</Table>

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

Exhibit C - Page 13
<PAGE>

                                    EXHIBIT D

                                FORM OF AS-BUILTS

1. Alignment Sheets

A. As-Built Alignment Sheets shall include the following information:

Cable Information: cable type, fiber type, reel number, cable composition

Right-of-Way: landowner/facility owner, border locations (per muncipality)

Route Information: manhole/handhole location and number, manhole/handhole size
and ownership, splice locations, cable length markers at splice points and slack
coils, splice enclosure type, attachment height (when applicable), pole number
(when applicable), bore location (when applicable), bridge/tunnel attachment
(when applicable), offset and depty (when applicable), location of utility
crossings, location of reference points/permanent structures, transitional
points, street names, conduit and innerduct position information/butterflies

B. As-Built Alignment Sheets shall be updated with actual construction field
data.

C. The scale of As-Built Alignment Sheets shall not exceed 1" = 200' in
metropolitan areas (areas where there is either extensive development and
improvement or rapid growth (new building construction)) or 1" = 500' in
non-metropolitan areas.

2. Format

Drawings shall be "blue lines", as such term is understood in the industry or in
CAD format revision 14 or a later revision. The Williams Communications may,
after the Acceptance Date, adopt any replacement method of creating or providing
drawings that is generally accepted in the industry and that provides equivalent
information.

3. Transmission Site Floor Plans

Floor plans for Transmission Sites shall show rack placement and assignment for
Lessee's floor space.

Exhibit D - Page 1
<PAGE>

                                    EXHIBIT E

                           CONSTRUCTION SPECIFICATIONS

PART 1 - CABLE AND OPTICAL FIBER SPECIFICATIONS

         1. The fiber optic cable shall be single or double armor in design or
contained in steel conduit with at least schedule 40 wall thickness. The cable
may be either loose tube or central core in construction. The central strength
member shall be dielectric. Each buffer tube or ribbon shall contain no more
than 12 fibers.

         2. All connectors shall be Ultra FC-PC or SC-PC unless both parties
agree to another type.

         3. Fiber type shall be as specified in Exhibits D for each Selected
Segment.

         4. Manufacturers' specifications for Corning SMF-28, SMF-LS, SMF-LEAF
are attached and incorporated herein.

PART 2 -- Cable Installation Specifications

1. Material

o    Steel or PVC conduit shall be minimum schedule 40 wall thickness.

o    Any exposed steel conduit, brackets or hardware (e.g., bridge attachments)
     shall be hot-dipped galvanized after fabrication.

o    All split steel shall be flanged.

o    Handholes shall have a minimum H-15loading rating.

o    Manholes shall have a minimum H-20 loading rating.

o    Warning signs shall display universal do not dig symbol, "Warning-Buried
     Fiber-Optic Cable," company name and logo, local and emergency One Call
     toll-free numbers.

2. Minimum Depths

Minimum cover required in the placement of the conduit/cable shall be forty-two
inches (42"), except in the following instances:

o    The minimum cover in ditches adjacent to roads, highways, railroads and
     interstates is forty-eight inches (48") below the clean out line or
     existing grade, whichever is greater.

o    The minimum cover across streams, river washes, and other waterways shall
     be sixty inches (60") below the clean out line or existing grade, whichever
     is greater.

o    At locations where the cable crosses other subsurface utilities or other
     structures, the cable/conduit shall be installed to provide a minimum of
     twelve inches (12") of vertical

Exhibit E - Page 1
<PAGE>

     clearance from the utility/obstacle. The cable/conduit can be placed above
     the utility/obstacle, provided the minimum clearance and applicable minimum
     depth can be maintained; otherwise the cable/conduit shall be installed
     under the existing utility or other structure.

o    In rock, the cable/conduit shall be placed to provide a minimum of eighteen
     inches (18") below the surface of the solid rock, or provide a minimum of
     forty-two inches (42") of total cover, whichever requires the least rock
     excavation.

o    Where existing pipe is used, current depth is sufficient.

3. Buried Cable Warning Tape

All cable/conduit shall be installed with buried cable warning tape. The warning
tape shall be:

o    laid a minimum of twelve inches (12") above the cable/conduit

o    generally placed at a depth of twenty-four inches (24") below grade and
     directly above the cable/conduit

o    a minimum of three inches (3") wide and display "Warning-Buried Fiber-Optic
     Cable," a company name, logo and emergency one-call toll-free number
     repeated every twenty-four inches (24").

4. Conduit Construction

o    Conduits may be placed by means of trenching, plowing, jack and bore,
     multi-directional bore or directional bore.

o    Conduits shall generally be placed on a level grade parallel to the
     surface, with only gradual changes in grade elevation.

o    Steel conduit shall be joined with threaded collars, Zap-Lok or welding.
     (Welding is the preferred method.)

o    All crossings of paved city, county, state, federal, and interstate
     highways, or railroad crossings shall be encased in conduit.

o    All crossings of major streams, rivers, bays and navigable waterways shall
     be placed in HDPE, PVC or steel conduit, or shall use specially armored
     submarine cable.

o    At all foreign utility/underground obstacle crossings, conduit shall be
     placed and shall extend at least five feet (5') beyond the outer limits of
     the obstacle in both directions.

o    All jack and bores shall use HDPE or steel conduit.

o    All directional or mini-directional bores shall use HDPE or steel conduit.

o    Any cable placed in swamp or wetland areas shall be placed in HDPE, PVC, or
     steel conduit.

5. Innerduct Installation

o    No cable shall be placed directly in any split/solid steel conduit without
     innerduct. o Innerduct(s) shall extend beyond the end of all conduits a
     minimum of eighteen inches (18").

6. Cable Installation in Conduit

o    The cable shall be installed using either a sealed pneumatic cable blowing
     system or a

Exhibit E - Page 2
<PAGE>

     powered pulling winch and hydraulic powered assist pulling wheels.

o    The maximum pulling force to be applied to the cable shall be six hundred
     pounds (600 lbs.).

o    Sufficient pulling assists shall be available and used to insure the
     maximum pulling force is not exceeded at any point along the pull.

o    The cable shall be lubricated at the reel and all pulling assist locations.

o    A pulling swivel breakaway rated at six hundred pounds (600 lbs.) shall be
     used at all times.

o    Splices shall be allowed only at planned junctions and reel ends.

o    All splices shall be contained in a handhole or manhole. o A minimum of
     twenty meters (20m) of slack cable shall be left in all intermediate
     handholes and manholes.

o    A minimum of thirty meters (30m) of slack cable shall be left in all splice
     locations.

o    A minimum of fifty meters (50m) of slack cable shall be left in
     Transmission Sites and points of presence.

o    Inside of buildings or when installed in solid steel conduit, PVC
     conduit/innerduct may be split, with the cable installed inside the split
     duct but all other instances require solid PVC conduit/innerduct.

7. Manholes and Handholes

o    Manholes shall be placed in traveled surface streets and shall have locking
     lids.

o    Handholes shall be placed in all other areas, and be installed with a
     minimum of eighteen inches (18") of soil covering lid.

8. EMS Markers

EMS Markers shall be placed directly above the lid of all buried handholes or
shall be fabricated into the lids of the handholes.

9. Cable Markers (Warning Signs)

o    Cable markers shall be installed at all changes in cable running line
     direction, splices, pull boxes, assist-pulling locations, and at both sides
     of street, highway or railroad crossings.

o    Markers shall be spaced at intervals of no more than five hundred feet
     (500') apart in metropolitan areas (areas where there is either extensive
     development and improvement or rapid growth (new building construction))
     and within line of sight (not to exceed one thousand feet (1,000')) in
     non-metropolitan areas.

o    Markers shall be positioned so that they can be seen from the location of
     the cable and generally set facing perpendicular to the cable running line.

o    Splices and pull boxes shall be marked on the cable marker post.

10. Fiber Optic Groundwire

The Williams Communications, Inc. (Vyvx) Optical Groundwire Specifications
(Issue 1; October 15, 1996) shall apply to optical groundwire (aerial fibers
installed within power transmission

Exhibit E - Page 3
<PAGE>

groundwire cable). Sections 2 through 9 of this Exhibit shall not apply to
optical groundwire. Upon written request, Williams shall promptly provide MFN a
copy of its Optical Groundwire Specifications.

11. Updating of Specifications

The Williams Communications may revise these Cable Installation Specifications
to include new procedures, materials, or processes so long as the changes
achieve the objectives of the specifications set forth above and are in
accordance with, or superior to, then-current telecommunications industry
standards.

Exhibit E - Page 4

<PAGE>
EXECUTION COPY

CONFIDENTIAL PORTION MARKED [*************] HAS BEEN OMITTED PURSUANT TO A
REQUEST FOR CONFIDENTIAL TREATMENT AND FILED SEPARATELY WITH THE SECURITIES
AND EXCHANGE COMMISSION.

                       FIRST AMENDMENT TO LEASE AGREEMENT

         THIS FIRST AMENDMENT ("Amendment") is made by and between WILLIAMS
COMMUNICATIONS, LLC, a Delaware limited liability company ("Williams
Communications"), METROMEDIA FIBER NATIONAL NETWORK, INC., a Delaware
corporation ("Lessee") and METROMEDIA FIBER NETWORK SERVICES, INC. ("MFNS") a
Delaware corporation.

                                   Background

Lessee and Williams Communications are parties to the Lease Agreement dated
April 26, 2002 (the "Agreement").

On May 20, 2002, Lessee and most of its direct and indirect domestic
subsidiaries, including MFNS, each filed voluntary petitions for reorganization
pursuant to Chapter 11 of title 11 of the United States Code. (the "Bankruptcy
Code") with the United States Bankruptcy Court for the Southern District of New
York (the "Bankruptcy Court") and Lessee is currently operating its business and
managing its property as a debtor-in-possession.

The parties now wish to amend the Agreement in accordance with the terms set
forth in this Amendment.

NOW THEREFORE, for mutual consideration, the value of which the parties
acknowledge, the terms of the Agreement are amended as follows:

1. Capitalized terms not otherwise defined in this Amendment have the meaning
ascribed in the Agreement.

2. On the Effective Date, pursuant to Section 20.1, the Agreement as amended is
wholly assigned from Lessee to MFNS, and thereafter all references to "Lessee"
refer to MFNS and MFNN is discharged from further obligation.

3. The definition of "Term" is deleted and replaced with the following:

"'TERM' begins on the date of full execution of the First Amendment to this
Agreement and includes the initial term and any subsequent renewal terms."

4. Section 3.1 is deleted and replaced with the following:

"During the Term, unless otherwise converted to an IRU pursuant to Section 3.6,
Williams Communications grants to Lessee a Lease in 14,770 fiber miles in the
Williams Communications System (the 'Lessee Fiber').
[****************************************************
********************************************************************************
********************************************************************************
********************************************************************************
********************************************************************************
********************************************************************************
********************************************************************************
*****************************************************]

CONFIDENTIAL
PAGE 1 OF 4

<PAGE>
EXECUTION COPY

5. The following Section 3.6 is added to the Agreement:

"TERM. The initial term of the agreement expires [*********] years after the
Effective Date of the First Amendment to this Agreement, with [***************]
renewal periods. Unless Lessee provides a minimum of 60 days notice of
termination prior to the expiration of the then-current term, the Agreement
automatically renews under the same terms and conditions."

6. EXHIBITS B AND C are wholly replaced with EXHIBIT B-1 AND C-1, attached to
this Amendment.

7. Section 4.1(a) is modified as follows: "27,000" is replaced with "14,770";
"[********]" is replaced with "[********]".

8. Section 17.7 is added to the Agreement:

"CROSS DEFAULT. Williams Communications and Lessee are parties to a second Lease
Agreement dated April 26, 2002 pursuant to which Williams Communications is the
lessee (the "Metro Agreement"). The parties agree that a default under the Metro
Agreement is deemed a default under this Agreement, giving the non-defaulting
party the right to terminate if the Metro Agreement is likewise terminated. The
right to terminate under this Section 17.7 automatically expires if the
non-defaulting party does not provide notice, within 60 days after termination
of the Metro Agreement, of its intent to exercise its right to terminate this
Agreement. Such termination shall be effective 120 days after such notice, if
given.

9. EFFECTIVE DATE. This Amendment is effective upon the date of the last
signature hereto ("Effective Date"). The parties agree that the new billing rate
as specified in paragraph 7 of this Amendment is effective October 1, 2002. To
be sure, any invoices rendered during September 2002 for October services, will
be adjusted accordingly. Notwithstanding the foregoing, the parties acknowledge
that the Amendment must be approved by the Bankruptcy Court pursuant to an
order, in form and substance acceptable to Williams Communications and Lessee,
which provides for, among other things, the following: (i) assumption of the
Agreement, as amended, pursuant to section 365 of the Bankruptcy Code, and (ii)
a finding that the parties negotiated the Amendment at arm's length and in good
faith. If such approval is not obtained on or before October 17, 2002 or such
later date as the parties may agree to, this Amendment will be null and void and
of no force or effect and Lessee agrees to pay the difference between the
amended amounts invoiced for October and the actual amounts owed under the
Agreement.

10. ASSUMPTION AND WAIVER OF SPECIFIC CLAIMS. Following the assumption of the
Agreement, if the Agreement is terminated due to Lessee's failure to perform or
its rejection thereof, nothing herein constitutes a waiver of Williams
Communications' right to a general unsecured claim for all outstanding
pre-petition amounts owed under the Agreement and an administrative claim for
post-petition damages caused by any breach of the Agreement, or of the right of
MFN or any party in interest to object to any such claim. Any and all
administrative

CONFIDENTIAL
PAGE 2 OF 4

<PAGE>
EXECUTION COPY

expense claims will require Williams Communications to satisfy the requirements
of the Bankruptcy Code to establish the claim and is without prejudice to any
other party's right to contest such claim.

11. As additional consideration, Lessee agrees to provide Williams
Communications with the opportunity to view all future local and long-haul
capacity requirements of Lessee and will have the opportunity to displace any
other capacity provider currently used by Lessee as such service contracts
expire. Notwithstanding anything in this paragraph, Lessee is not obligated to
purchase any services from Williams Communications that do not strictly meet
Lessee's requirements, or to execute orders if the terms of service are not
competitive with other third-party providers of the same or similar service.

12. Except as amended, all of the original terms and conditions of the Agreement
continue in full force and effect, neither party is in currently in default, and
the Agreement, as amended is hereby ratified and confirmed.

13. This Amendment may be executed in counterparts, each of which taken together
constitute one and the same instrument.

The parties have executed this Amendment on the dates set forth below.

METROMEDIA FIBER NATIONAL NETWORK, INC., a Delaware corporation

Signature:        /s/ William G. La Perch
          --------------------------------------

(Print) Name:      William G. La Perch
              ----------------------------------

(Print) Title:     Sr. Vice President
              ----------------------------------

Date:             10/10/02
    --------------------------------------------

METROMEDIA FIBER NETWORK SERVICES, INC., a Delaware corporation

Signature:        /s/ William G. La Perch
          --------------------------------------

(Print) Name:      William G. La Perch
              ----------------------------------

(Print) Title:     Sr. Vice President
              ----------------------------------

Date:             10/10/02
    --------------------------------------------

CONFIDENTIAL
PAGE 3 OF 4

<PAGE>
EXECUTION COPY

WILLIAMS COMMUNICATIONS, LLC, a Delaware limited liability company

Signature:        /s/ Frank M. Semple
          --------------------------------------

(Print) Name:      Frank M. Semple
              ----------------------------------

(Print) Title:    Chief Operating Officer
              ----------------------------------

Date:             10/2/02
    --------------------------------------------

CONFIDENTIAL
PAGE 4 OF 4

<PAGE>
EXECUTION COPY

                                   EXHIBIT B-1

                                SELECTED SEGMENTS

<Table>
<Caption>
                                    MFN ACCEPTANCE       ROUTE       NO. OF FIBERS    FIBER ROUTE MILES
        ROUTE SEGMENTS                  DATE             MILES         PER ROUTE           ACCEPTED
-------------------------------------------------------------------------------------------------------
<S>                                 <C>                  <C>              <C>           <C>

Atlanta to Washington, DC              05/24/00             820             2                1640

Dallas to Kansas City                  11/27/00             690             2                1380

Denver to Salt Lake City               03/28/00             400             2                 800

Houston to Dallas(1)                   05/26/00             250             2                 500

Houston to Atlanta(1)                  05/26/00            1000             2                2000

Kansas City to Denver                  12/13/99             610             2                1220

Boston to Albany                        9/27/00             180             2                 360

Los Angeles to San Diego               05/23/01             200             2                 400

Minneapolis to Kansas City             12/13/99             500             2                1000

Phoenix to Houston                     11/11/00            1200             2                2400

Sacramento to Salt Lake City           12/18/00             630             2                1260

Sacramento To San Francisco            03/23/01             100             2                 200

San Diego to Phoenix                   02/26/01             350             2                 700

Minneapolis to Chicago                                      455             2                 910
                                                                                          -------
                          TOTALS                                                           14,770
                                                                                          =======
</Table>

CONFIDENTIAL
FIRST AMENDMENT TO LEASE AGREEMENT
EXHIBIT B-1

<PAGE>
EXECUTION COPY

                                   EXHIBIT C-1

                                COLLOCATION SITES

<Table>
<Caption>
        SELECTED SEGMENT                    POP LOCATIONS            TRANSMISSION SITE LOCATIONS
        ----------------                    -------------            ---------------------------
<S>                                        <C>                       <C>

ATLN - WASH

Lawrenceville                                                        790 Mcart Rd., Lawrenceville, GA 30245

Athens (a\k\a Hull)                                                  920 Smith Road, Hull, GA 30646

Hartwell                                                             4260 Liberty Mill Rd., Hartwell, GA
                                                                     30643

Greenville                                                           9744 Augusta Rd., Greenville, SC 29669

SPARTANBURG, SC                             SPARTANBURG POP - BTC BUILDING, 145 N. CHURCH ST., SUITE 3,
                                            SPARTANBURG, SC 29306

York                                                                 2154 Templeton Rd., Clover, SC 29710

CHARLOTTE, NC                               CHARLOTTE POP - 112 N. MEYERS ST., CHARLOTTE, NC 28202

Salisbury (a\k\a Mt. Ulla)                                           295 Upright Rd., Mt. Ulla, NC 28125

Kernersville Jct.                                                    LOT #51M, 1334 Old Salem Road,
                                                                     Kernersville, NC 27284

SPUR TO GREENSBORO & RALEIGH, NC

Reidsville                                                           1301 Ashley Loop, Reidsville, NC 27320

Chatham                                                              945 Transco Rd., Chatham, VA 24531

Appomattox                                                           Hwy. 691 SW, Appomattox, VA 24522

Scottsville Jct.                                                     Highway 643, Scottsville, VA 24590

SPUR TO RICHMOND, VA

Unionville                                                           74444 Everona Rd., Unionville, VA
                                                                     22587

Manassas                                                             10699 Piperlane, Manassas, VA 20110

HSTN - DLLS (IXC)

HOUSTON, TX                                 HOUSTON POP - 1124 HARDY STREET, HOUSTON, TX 77020

Willis (a\k\a Montgomery Co.)                                        16533 IH 45 NORTH, Willis, TX 77378

Madison                                                              Route 2, Box 213, Madisonville, TX
                                                                     77864

Buffalo                                                              23433 IH 45 North, Buffalo, TX 75831

Streetman                                                            16108 IH 45 North, Streetman, TX 75859
</Table>

CONFIDENTIAL
FIRST AMENDMENT TO LEASE AGREEMENT
EXHIBIT C-1

<PAGE>
EXECUTION COPY

<Table>
<S>                                        <C>                       <C>
Ennis                                                                3910 IH 45 North, Ennis, TX 75120

KSCY - DNVR

KANSAS CITY, MO                             KANSAS CITY POP - THE BRYANT BLDG., 1102 GRAND AVE. #300,
                                            KANSAS CITY, MO 64106

Lawrence                                                             13804 246th St., Lawrence, KS 66044

TOPEKA, KS                                  TOPEKA POP - 101 SE MONROE, TOPEKA, KS 66603

Allen (a\k\a Miller)                                                 1836 County Rd. 330, Osage City, KS
                                                                     66868

Elmdale                                                              RR 1, Elmdale, Cottonwood Falls, KS
                                                                     66850

Newton                                                               937 Falcon Road, Newton, KS 67114

Inman                                                                380 Plum Ave., Inman, KS 67546

Ellinwood                                                            1150 E BARTON CO. ROAD, Ellinwood, KS
                                                                     67526

Bison                                                                Rural Rt. 1, Bison, KS 67520

Ellis                                                                Rural Rt. 1, Ellis, KS 67637

Grainfield                                                           1102 COUNTY ROAD 50, Grainfield, KS
                                                                     67737

Oakley (a\k\a Monument)                                              2317 Daydream Road, Monument, KS 67747

Goodland                                                             5655 County Road #16, Goodland, KS

Burlington (a\k\a Bethune)                                           32353 County Rd. 40, Burlington, CO
                                                                     80805

Flagler                                                              7250 County Rd. HH, Flagler, CO 80815

Woodrow                                                              1018 HIGHWAY 71, Woodrow, CO 80757

Strasburg                                                            2598 S County Rd., 157, Strasburg, CO
                                                                     80136

PTLD - SCRM

PORTLAND, OR                                PORTLAND POP - 707 SW WASHINGTON ST., 4TH FL., SUITE 410,
                                            PORTLAND, OR 97205

SCRM - SLKC

SACRAMENTO, CA                              SACRAMENTO POP II - 770 L. ST., SUITE 120, SACRAMENTO, CA 95814

Auburn Alt.                                                          1725 Auburn Ravine Road, Auburn, CA
                                                                     95603

Blue Canyon                                                          Blue Canyon Exit off I-80, Blue
                                                                     Canyon, CA 95714

Truckee                                                              10136 Hirshdale Road, Truckee, CA
                                                                     96161

RENO, NV                                    RENO POP - 220 GARDNER ST., RENO, NV 89503

Hot Springs Flat (a\k\a Fallon)                                      Exit 65 off I-80, Nightingale Rd.,
                                                                     Fallon, NV 89406

Lovelock                                                             55 Cornell Avenue, Lovelock, NV 89419

Mill City (a\k\a Imlay)                                              Exit 149 on I-80, Lot 14, Block B
                                                                     Mill City Acres, Imlay, NV 89418
</Table>

CONFIDENTIAL
FIRST AMENDMENT TO LEASE AGREEMENT
EXHIBIT C-1

<PAGE>
EXECUTION COPY

<Table>
<S>                                        <C>                       <C>

Golconda Butte (a\k\a Winnemucca)                                    Exit 187 off I-80, North of
                                                                     interchange, Winnemucca, NV 89445

Snow Gulch                                                           Exit 222 off I-80, 1.9 miles North of
                                                                     Access, Snow Gulch, NV 89444

Dunphy (a\k\a Eureka)                                                Exit 254 off I-80 North, East 3.5
                                                                     miles, Eureka, NV 89821

Hunter (a\k\a McGill)                                                Exit 292 off I-80, North of
                                                                     intersection, then East, McGill, NV
                                                                     89318

Deeth (a\k\a Elko)                                                   Exit 333 off I-80, 5 miles East on North
                                                                     Frontage Rd, Elko, NV 89835

Oasis                                                                Exit 380 off I-80, Oasis, NV 89830

Wendover                                                             3131 East Frontage Road, Wendover, UT
                                                                     84083

Barrow                                                               9.5 miles West of I-80, Barro, UT
                                                                     84083

Timpie (a\k\a Tooele)                                                15516 West Rowley Road, Tooele, UT
                                                                     84022

SALT LAKE CITY, UT                          SALT LAKE CITY POP - 5035 HAROLD GATTY DRIVE, SALT LAKE CITY,
                                            UT 84116

HSTN - ATLN

HOUSTON, TX                                 1124 HARDY STREET, HOUSTON, TX 77020

Kingwood (a\k\a Huffman or Harris)                                   33902 Huffman-Cleveland R, Huffman,
                                                                     TX 77336

Sour Lake (a\k\a Hardin)                                             29979 Highway 105, Sour Lake, TX 77659

Buna (a\k\a Jasper)                                                  Hwy 62 South, Buna, TX 77612

Ragley (a\k\a Beauregard)                                            17329 Hwy 171 North, Ragley, LA 70657

Basile (a\k\a Evangeline)                                            1919 Hunter Rd., Basile, LA 70515

Port Barre (a\k\a St. Landre or Washington)                          2343 Highway 359, Washington, LA 70589

Zachary Jct. (a\k\a Feliciana or Jackson)                            1479 A Highway 964, Jackson, LA 70748

SPUR TO NEW ORLEANS, LA

Greensburg (a\k\a St. Helena)                                        Hwy 43 North, Greensburg, LA 70441

Tylertown (a\k\a Walthall)                                           967 Hwy 583, Tylertown, MS 39667

Seminary (a\k\a Covington Co.)                                       11 Kelly Creek Road, Seminary, MS
                                                                     39479

SPUR TO JACKSON, MS

Laurel (a\k\a Jasper or Sandersville)                                1666 Bonner Road, Sandersville, MS
                                                                     39477

Quitman (a\k\a Jasper Co.)                                           240 Vyvx Lane, Quitman, MS 39955

Linden (a\k\a Merengo or Sweetwater)                                 Hwy 69 South, Sweetwater, AL 36782

Selma (a\k\a Dallas Co. or Browns)                                   1713 County Road 179, Browns, AL 36724
</Table>

CONFIDENTIAL
FIRST AMENDMENT TO LEASE AGREEMENT
EXHIBIT C-1

<PAGE>
EXECUTION COPY

<Table>
<S>                                        <C>                       <C>

Clanton (a\k\a Chilton or Billingsley)                               4521 Chilton Road #352, Billingsley,
                                                                     AL 36006

SPUR TO BIRMINGHAM, AL

Alexander City (a\k\a Coosa or Kellyton)                             250 Highway 9, Kellyton, AL 35089

Wadley (a\k\a Randolph Co.)                                          1140 County Rd 41, Wadley, AL 36276

Newnan (a\k\a Coweta Co.)                                            65 Mayo Royal Road, Newnan, GA 30263

MPLS - KSCY

MINNEAPOLIS, MN                             511 11TH AVE. SOUTH, SUITE 201, MINNEAPOLIS, MN

Northfield                                                           6730 320th Street West, Northfield,
                                                                     MN 55057

Owantonna (a\k\a Hope)                                               6391 SW 68th Street, Owantonna, MN
                                                                     55060

Hanlon Town (a\k\a Tenold)                                           807 435th Street, Hanlon Town, IA
                                                                     50444

Latimer                                                              1825 Finch Avenue, latimer, IA 50452

Roland                                                               12951 610th Avenue, Roland, IA 50236

DES MOINES, IA                              DES MOINES POP - 4500B CARLISLE ROAD, DES MOINES, IA 50317

Osceola                                                              2241-B US Highway 69, Osceola, IA
                                                                     50213

Ridgeway                                                             20469 W. 230th Place, Ridgeway, MO
                                                                     64481

Maysville (a\k\a Weathersby)                                         99 Southeast Dallas Road, Weathersby,
                                                                     MO 64497

Plattsburgh (a\k\a Lilly)                                            2821 Southwest Street, Plattsburg, MO
                                                                     64497

SCRM - SNFC

SACRAMENTO, CA                              SACRAMENTO POP II - 1005 'B' STREET, SACRAMENTO, CA 95814

Bay Point                                                            487 Canal Road, Bay Point, CA 94565

Creed                                                                6732 Creed Road, Suisin City, 94585

SAN FRANCISCO, CA                           SAN FRANCISCO POP - 200 PAUL ST., 4TH FLOOR, SAN FRANCISCO, CA
                                            94124
</Table>

CONFIDENTIAL
FIRST AMENDMENT TO LEASE AGREEMENT
EXHIBIT C-1

<PAGE>

CONFIDENTIAL PORTION MARKED [*************] HAS BEEN OMITTED PURSUANT TO A
REQUEST FOR CONFIDENTIAL TREATMENT AND FILED SEPARATELY WITH THE SECURITIES
AND EXCHANGE COMMISSION.

                       SECOND AMENDMENT TO LEASE AGREEMENT

         THIS SECOND AMENDMENT ("Amendment") is made by and between WILTEL
COMMUNICATIONS, LLC, a Delaware limited liability company ("WilTel
Communications"), and METROMEDIA FIBER NETWORK SERVICES, INC. ("Lessee") a
Delaware corporation.

                                   Background

Metromedia Fiber National Network, Inc., a Delaware corporation ("MFNN") and
WilTel Communications executed that certain Lease Agreement dated April 26,
2002, as amended October 10, 2002 (the "Agreement").

The Agreement was wholly assigned by MFNN to Lessee on October 10, 2002.

The parties now wish to amend the Agreement to remove certain Lessee Fiber in
accordance with the terms set forth in this Amendment.

NOW THEREFORE, for mutual consideration, the value of which the parties
acknowledge, the terms of the Agreement are amended as follows:

1. Capitalized terms not otherwise defined in this Amendment have the meaning
ascribed in the Agreement.

2. The reference to "14,770 fiber miles" in Section 3.1 is replaced with "14,410
fiber miles".

3. EXHIBIT B-1 is wholly replaced with EXHIBIT B-2 attached to this Amendment.

4. Section 4.1(a) is modified as follows: "14,770" is replaced with "14,410";
"[********]" is replaced with "[********]".

5. EFFECTIVE DATE. This Amendment is effective upon the date of the last
signature hereto ("Effective Date").

CONFIDENTIAL
PAGE 1 OF 4
<PAGE>

6. Lessee Fiber Interconnections. WilTel Communications will provide Lessee
Fiber/Backbone Access as detailed below, at the specified pricing
(notwithstanding Article 3):

<Table>
<Caption>
                                                           BACKBONE
                     DEMARCATION             LEASE         ACCESS           NON-RECURRING
MARKET               POINTS                PAYMENTS        PAYMENTS         CHARGES                    OTHER
------               -----------           --------        --------         -------------              -----
<S>                  <C>                  <C>              <C>             <C>                         <C>

Los Angeles, CA      624 South Grand,       [**]             [**]           Lessee pays for Cost of    Lessee, at
                     Suite 1706 (1                                          fiber connectivity         its sole
                     Wilshire) to the                                       between fiber              cost, will
                     "Meet-me-Room" on                                      distribution panels.       perform its
                     the 4th floor of                                                                  own splice
                     the same building                                                                 and test.  WC
                     (non-diverse)                                                                     will provide
                                                                                                       LOA.

Dallas, TX  .        WC 5th Floor POP       [**]             [**]           Lessee pays for Cost of
                     at 400 S. Akard                                        any splicing and testing
                     to designated                                          work and fiber
                     manhole serving                                        connectivity between
                     Lessee Fiber from                                      fiber distribution
                     same Building                                          panels.
                     (non-diverse)

Chicago, IL          WC's floor             [*******]                       Lessee pays for Cost of
                     connecting to ~ 5                                      any splicing and testing
                     mile lateral                                           work and fiber
                     terminating in                                         connectivity between
                     previously agreed                                      fiber distribution
                     upon manhole                                           panels
                     serving Lessee
                     Fiber.

Kansas City          WC POPs at 1102        [*******]                       Lessee pays for Cost of
                     Grand Avenue,                                          fiber connectivity
                     #300 and 1212 E.                                       between fiber
                     19th Street                                            distribution panels.
                     (non-diverse)
</Table>

6. Except as amended, all of the original terms and conditions of the Agreement
continue in full force and effect, neither party is in currently in default, and
the Agreement, as amended is hereby ratified and confirmed.

CONFIDENTIAL
PAGE 2 OF 4
<PAGE>

7. This Amendment may be executed in counterparts, each of which taken together
constitute one and the same instrument.

The parties have executed this Amendment on the dates set forth below.

METROMEDIA FIBER NETWORK SERVICES, INC., a Delaware corporation

Signature:        /s/ William G. La Perch
          --------------------------------------------------

(Print) Name:      William G. La Perch
              ----------------------------------------------

(Print) Title:    SVP - Network Services
              ----------------------------------------------

Date:             2/14/03
    --------------------------------------------------------

WILTEL COMMUNICATIONS, LLC, a Delaware limited liability company

Signature:        /s/ T. J. Gallagher
          --------------------------------------------------

(Print) Name:     T. J. Gallagher
              ----------------------------------------------

(Print) Title:    VP & GM, Business Development
              ----------------------------------------------

Date:             2/14/03
    --------------------------------------------------------

CONFIDENTIAL
PAGE 3 OF 4
<PAGE>

                                   EXHIBIT B-2

                                SELECTED SEGMENTS

<Table>
<Caption>
                                    MFN ACCEPTANCE         ROUTE     NO. OF FIBERS    FIBER ROUTE MILES
      ROUTE SEGMENTS                     DATE              MILES       PER ROUTE           ACCEPTED
      --------------                --------------         -----     -------------    -----------------
<S>                               <C>                   <C>           <C>             <C>

Atlanta to Washington, DC              05/24/00             820             2                1640

Dallas to Kansas City                  11/27/00             690             2                1380

Denver to Salt Lake City               03/28/00             400             2                 800

Houston to Dallas 1                    05/26/00             250             2                 500

Houston to Atlanta 1                   05/26/00            1000             2                2000

Kansas City to Denver                  12/13/99             610             2                1220

Los Angeles to San Diego               05/23/01             200             2                 400

Minneapolis to Kansas City             12/13/99             500             2                1000

Phoenix to Houston                     11/11/00            1200             2                2400

Sacramento to Salt Lake City           12/18/00             630             2                1260

Sacramento To San Francisco            03/23/01             100             2                 200

San Diego to Phoenix                   02/26/01             350             2                 700

Minneapolis to Chicago                                      455             2                 910
                                                                                          -------
                          TOTALS                                                           14,410
                                                                                          =======
</Table>

CONFIDENTIAL
SECOND AMENDMENT TO LEASE AGREEMENT
EXHIBIT B-2

<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

CONFIDENTIAL PORTION MARKED [*************] HAS BEEN OMITTED PURSUANT TO A
REQUEST FOR CONFIDENTIAL TREATMENT AND FILED SEPARATELY WITH THE SECURITIES
AND EXCHANGE COMMISSION.

                      COLLOCATION AND MAINTENANCE AGREEMENT

                                     BETWEEN

                    WILLIAMS COMMUNICATIONS, LLC ("PROVIDER")

                                       AND

              METROMEDIA FIBER NATIONAL NETWORK, INC., ("CUSTOMER")

                              DATED APRIL 26, 2002

<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

                                TABLE OF CONTENTS

<Table>
<Caption>
ARTICLE                                                                     PAGE
-------                                                                     ----
<S>                                                                         <C>
   ARTICLE I.  DEFINITIONS....................................................1
   ARTICLE II.  CONSIDERATION, FEES AND PAYMENT TERMS.........................3
   ARTICLE III.  GRANT OF LICENSE AND COLLOCATION.............................6
   ARTICLE IV.  INTENTIONALLY OMITTED........................................10
   ARTICLE V.  TERM..........................................................10
   ARTICLE VI.  CUSTOMER FIBER MAINTENANCE...................................10
   ARTICLE VII.  AUDIT RIGHTS................................................11
   ARTICLE VIII.  WARRANTIES.................................................11
   ARTICLE IX.  DEFAULT......................................................12
   ARTICLE X.  INDEMNIFICATION...............................................13
   ARTICLE XI.  LIMITATION OF LIABILITY......................................14
   ARTICLE XII.  INSURANCE...................................................15
   ARTICLE XIII.  TAXES......................................................16
   ARTICLE XIV.  NOTICE......................................................16
   ARTICLE XV.  CONFIDENTIALITY..............................................17
   ARTICLE XVI.  PROHIBITION ON IMPROPER PAYMENTS............................18
   ARTICLE XVII.  FORCE MAJEURE; EMINENT DOMAIN..............................18
   ARTICLE XVIII.  SETTLEMENT OF DISPUTES....................................19
   ARTICLE XIX.  RULES OF CONSTRUCTION.......................................19
   ARTICLE XX.  ASSIGNMENT...................................................21
   ARTICLE XXI.  ENTIRE AGREEMENT; AMENDMENT; EXECUTION......................21
</Table>

                                       i
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

                                    EXHIBITS

Exhibit A         Collocation Sites
Exhibit B         Operations Specifications

                                       ii
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

                      COLLOCATION AND MAINTENANCE AGREEMENT
                                (LONG-HAUL FIBER)

         This COLLOCATION AND MAINTENANCE AGREEMENT (this "Agreement") is made,
as of the 26 day of April, 2002 (the "Effective Date") by and between WILLIAMS
COMMUNICATIONS, LLC ("Provider"), a Delaware limited liability company, having
its principal office at One Technology Center, Tulsa, Oklahoma 74103 and
METROMEDIA FIBER NATIONAL NETWORK, INC. ("Customer"), a Delaware corporation
having its principal office at 360 Hamilton Avenue, White Plains, New York
10601.

                                   BACKGROUND

A. On this same date, the parties are entering a Fiber Lease Agreement ("Fiber
Agreement") pursuant to which Customer agrees to lease from Provider certain
fiber optic strands (the "Customer Fibers"); and

B. Customer desires to have Provider operate and maintain the Customer Fibers
and Provider desires to provide such services to Customer on the terms and
conditions set forth herein; and

C. In addition to maintenance services, Customer desires to acquire from
Provider, and Provider desires to provide to Customer, certain collocation
rights and services for the Customer Fibers upon the terms and conditions set
forth in this Agreement; and

NOW, THEREFORE, in consideration of the mutual promises set forth below, and
other good and valuable consideration, the receipt and sufficiency of which are
hereby acknowledged, the Parties hereby agree as follows:

                             ARTICLE I. DEFINITIONS

Capitalized terms and phrases used in this Agreement shall have the following
meanings:

"ADDITIONAL SERVICES" shall have the definition set forth in Section 3.4.

"AFFILIATE" means, with respect to any entity, an entity controlling, controlled
by, or under common control with such entity by means of direct or indirect
majority equity ownership or otherwise. As used in this Agreement, "control"
shall mean possession, directly or indirectly, of the power to direct or cause
the direction of the management and policies of a person or entity, whether
through the ownership of voting securities, by contract or otherwise.

"BASIC SERVICES" shall have the definition set forth in Section 3.3.

"CLAIM" means any claim, action, dispute, or proceeding of any kind between
Customer (or any of its Affiliates, successors or assigns) and Provider (or any
of its Affiliates, successors, or assigns) and any other claim, transaction,
occurrence, loss, liability, expense or other matter arising out of, in
connection with, or in any way related to, the Collocation Sites and this
Agreement, including the Exhibits hereto.

                                       1
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

"COLLOCATION NOTICE" is defined in Section 3.5(a).

"COLLOCATION SITE" shall mean each location in which Customer is granted
collocation rights hereunder, including POPs, regeneration and transmission
sites, central offices and commercial buildings. The initial Collocation Sites
are listed in Exhibit A, (includes the specified number of racks listed for each
such location) and any provided in the future pursuant to Section 3.5(a).

"COSTS" means actual and directly related costs accumulated in accordance with
the established accounting procedure used by Provider or Customer or their
respective contractors or subcontractors, as the case may be, which costs
include the following: (a) labor costs, including wages, salaries, benefits and
overhead allocable to such labor costs (Customer's or Provider's overhead
allocation percentage shall not exceed the lesser of (i) the percentage such
party allocates to its internal projects or (ii) one hundred and thirty percent
(130%), and (b) other direct costs and out-of-pocket expenses on a pass-through
basis (e.g., equipment, materials, supplies, contract services, etc.).

"CUSTOMER EQUIPMENT" means optronic (opto-electrical), electronic, or optical
equipment, or materials, interconnection facilities, or other equipment owned,
possessed, or utilized by Customer.

"FACILITY OWNERS/LENDERS" means any entity (other than Provider): (a) owning any
portion of the Collocation Site or Customer Fibers or any property or security
interest therein, (b) leasing to Provider, or providing an IRU to Provider in,
any portion of the Customer Fibers, or (c) that is a lender (including any party
holding legal title or a security interest in Provider's network as a lessor or
a creditor) with respect to Provider or any Affiliates of Provider.

"FORCE MAJEURE EVENT" shall mean any event due to causes beyond the reasonable
control of a Party, including, but not limited to: act of God; fire; flood;
material shortage or unavailability not resulting from the responsible Party's
failure to timely place orders or take other necessary actions therefor,
government codes, ordinances, laws, rules, regulations, or restrictions; war or
civil disorder; provided that (i) a loss by a Party of employees (other than by
reason of one or more Force Majeure Events), (ii) strikes and other labor
actions involving a Party's own work force, (iii) the failure (other than by
reason of force majeure) of any subcontractor, supplier or transporter to
perform its obligations to a Party (except on account of insolvency) unless such
supplies or transportation or other services are generally unavailable in the
marketplace, and (iv) any increase a Party's costs, shall not in and of itself
constitute a Force Majeure Event; and provided that an act or omission shall not
be deemed to be "beyond its control" if committed, omitted or caused by such
Party, or its employees, officers, agents or affiliates, or by any corporation
or other business entity that holds a controlling interest in said Party,
whether held directly or indirectly.

"INSTALLATION DATE" is the first date the Collocation Site is ready and
available for installation of Customer Equipment.

"LEASE CLAIMS" shall have the meaning set forth in Section 11.4.

"PARTY" or "PARTIES" shall mean either Customer, Provider or both.

                                       2
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

"PERSON" shall mean an individual; association, partnership, corporation,
limited liability company or other legally recognized entity.

"POP" means a telecommunications point of presence and, unless the context
indicates otherwise, refers to a Provider-designated point of presence located
along the route of the Customer Fibers.

"RELEASED PARTY" means each of the following:

          (a) any Affiliates of the other party and any Facility Owners/Lenders;

          (b) any employee, officer, director, stockholder, partner, member, or
          trustee of the other party or of its Affiliates or Facility
          Owners/Lenders; or

          (c) assignees of the entities included in the above subparagraphs (a)
          or (b) and any employee, officer, director, stockholder, partner,
          member, or trustee of such assignees.

"TAKING" shall have the definition set forth in Section 17.2.

"TERM" means the term of this Agreement as defined in Section 5.1.

"UNDERLYING LANDLORD" means any entity (other than Provider) leasing to Provider
any Collocation Site.

                ARTICLE II. CONSIDERATION, FEES AND PAYMENT TERMS

2.1 CHARGES FOR MAINTENANCE. Notwithstanding anything contained herein to the
contrary, Customer agrees to pay Provider monthly charges for maintenance
services equal to [********] through the April, 2002 billing cycle for receipt
of such services through May, 2002. For each month during the Term thereafter,
Customer shall pay Provider a maintenance fee of [*****] per fiber mile, per
month for the maintenance services set forth in Article 6 of this Agreement,
such amount totaling $[******] per month (27,000 fiber miles x [**]). Invoices
for such maintenance services shall be issued monthly.

2.2 CHARGES FOR COLLOCATION.

         (a) BASIC SERVICES. Customer shall pay for the use of the rack space
and associated Basic Services (including power up to 30 amps per rack):

                  (i)      at Collocation Sites listed in the Fiber Lease
                           Agreement that service the Customer Fibers at the
                           rate of [****] per rack per month; and

                  (ii)     at additional Collocation Sites ordered after the
                           Effective Date at Provider's then current standard
                           rates.

         (b) ADDITIONAL SERVICES. If Customer chooses to receive Additional
Services, it shall pay any and all (initial and continuing) costs reasonably
incurred by Provider in providing such Additional

                                       3
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

Services. Upon at least thirty (30) days' notice to Customer, Provider may
adjust recurring charges for the Additional Services once each calendar year to
equal its then-current standard charges.

                  (i) The current charge for additional racks (including up to
         20 amps of power per rack) is [*****] per rack per month.

                  (ii) The current monthly service charges for additional power
         are [***] per AC/amp or DC/amp (in excess of 20 combined amps per
         rack).

                  (iii) Customer shall pay a non-recurring charge for initial
         installation of Additional Service at a POP, which charges are forth in
         the table below.

<Table>
<Caption>
      DESCRIPTION OF CHARGE                                NONRECURRING CHARGE
<S>                                                        <C>

      Initial Installation Charge per rack                 [******]

      Per 10 AC or DC/amps (over combined 20) up           [****] per amp
      to 60 amps per rack total.

      Charge for more than 60 amps per rack total          [***]
</Table>

                  (iv) Provider agrees that Customer may cross-connect with
         third parties at each Collocation Site. Provider will charge and
         Customer will pay the following charges for interconnecting within
         Provider's POP:

               o    A non-recurring charge of [*****] per cross-/interconnect
                    (covers testing, cords...etc.)

               o    A monthly recurring charge of [****] for a single riser and
                    [*****] for dual risers per 4 fibers.

         (c) ESCORTED ACCESS. Customer shall pay Provider's charges for escorted
access to Collocation Sites, which may include minimum call-out times, and
night, weekend, and holiday differentials or multipliers as set forth below:

               o    Monday-Friday, 8:00 am to 5:00 pm local (2 hour min) [****]

               o    Monday-Friday, 5:01 pm to 7:59 am local (4 hour min) [****]

               o    Saturday & Sunday (4 hour min)                       [****]

               o    Holidays (4 hour min)                                [****]

         (d) EARLY TERMINATION. Except as set forth in Section 3.2, Customer is
liable for Collocation Charges (a) for one year after the Installation Date at
each POP, and (b) for five years after the Installation Date at each non-POP. If
Customer elects to terminate use of any racks it shall do so by giving Provider
30 days prior written notice and paying a termination fee equal to such charges.

         (e) ANCILLARY CHARGES. Current ancillary charges related to changes of
the Basic Services or the Additional Services are set forth in the table below:

                                       4
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

<Table>
<Caption>
ANCILLARY CHARGES                                           CHARGE PER OCCURRENCE

<S>                                                         <C>

Each change of Transmission Service Order (prior to spec    [****]
being written)

Each change of Transmission Service Order (after spec       [******]
written but before install)

Each change of Transmission Service Order (after install)   [************]

Order Cancellation of Additional Services (>/= 30 days      [****]
from Additional Services Ready Date)

Order Cancellation of Additional Services (< 30 days from   [******]
Additional Services Ready Date)
</Table>

All charges set forth in Subsections 2.2 (b), (c), (d) and (e) are subject to
change upon at least thirty (30) days' notice from Provider to Customer after
the first anniversary of the Effective Date.

2.3 METHOD OF PAYMENT. All payments to be made pursuant to this Agreement may be
made by check or draft of immediately available funds delivered to the address
designated in writing by the other Party (e.g., in a statement or invoice) or,
failing such designation, to the address for notice to such other Party provided
pursuant to Article XIV. Each Party shall make all payments in United States
currency.

2.4 TIME OF PAYMENT.

         (a) Recurring charges for maintenance services and collocation services
are invoiced in advance. Payments shall be prorated, as necessary, for the first
and last months such charges apply. Notwithstanding anything to the contrary in
this Agreement and regardless of whether Customer is ready to utilize the
collocation space in each of the Collocation Sites, the Collocation charges
shall begin to apply upon the Installation Date at the relevant site.

         (b) Provider shall issue invoices for any Additional Services after the
calendar month during which it provided such Additional Services, provided that
it may issue invoices for nonrecurring charges (including any Cost
reimbursement) based upon estimates of such charges and Customer shall pay such
invoices prior to performance of the work by Provider. Within thirty (30) days
of completion of the work, Provider shall invoice Customer for any Costs of such
work exceeding the estimate, or if the estimate exceeds the actual Costs,
Provider shall refund the Customer the difference.

         (c) Except as otherwise set forth in this Agreement, all amounts are
payable within thirty (30) calendar days of the invoice delivery date, as
determined by Section 14.2. Notwithstanding anything to the contrary contained
herein, Customer shall pay the maintenance and collocation fees during the term
of that certain Monthly Netting Agreement executed by the Parties on October 20,
2002, in accordance with the provisions of such Monthly Netting Agreement.

2.5 NO OTHER FEES. Except as otherwise set forth in this Agreement, neither
party shall charge the other party any maintenance, right-of-way, conduit
occupancy, or other recurring charges.

                                       5
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

                  ARTICLE III. GRANT OF LICENSE AND COLLOCATION

3.1 GRANT OF LICENSE.

         (a) Customer's rights under this Agreement are solely contractual,
granting Customer an exclusive license to locate, install, maintain and operate
Customer Equipment at each Collocation Site, but only as permitted by this
Agreement and only to the extent expressly set forth in this Agreement or an
accepted order for collocation services. No use of a Collocation Site required
or permitted under this Agreement shall create or vest in Customer any
easements, leasehold interests, or other ownership or property rights of any
nature in Provider's real or personal property. Customer shall provide,
maintain, and for all purposes be solely responsible for all Customer Equipment
at Collocation Sites.

         (b) Customer shall have the exclusive right to use the rack space
allocated to Customer in each Collocation Site for any lawful telecommunications
purpose. Provider shall have no right to use the Customer's rack space in any
Collocation Site during the Term except in the event of a Customer default and
subsequent termination of this Agreement.

         (c) In addition to the restrictions set forth in Article XX, Customer
shall not, directly or indirectly, convey any interest, sublicense or sublease
in the Collocation Site or any racks at such site (including Customer's right to
occupy the Collocation Site) to any other person, firm or entity, without the
prior written consent of Lessor.

3.2 COLLOCATION SITES.

         (a) Provider agrees to provide and Customer agrees to pay for the
Collocation Sites and corresponding number of racks identified in Exhibit A
under the column "Racks pre 6/1/02" in each of Provider's Collocation Sites. The
monthly charges for such racks and associated collocation services total
[********], which Customer agrees to pay Provider through the April, 2002
billing cycle for receipt of such services through May, 2002. On June 1, 2002,
this Agreement expires with respect to all the racks so identified, including
associated collocation services, and neither party has any further liability
with respect to such racks accruing after June 1, 2002.

         (b) As of June 1, 2002, Provider agrees to provide and Customer agrees
to pay for the Collocation Sites and corresponding number of racks identified in
Exhibit A under the column "Racks post 6/1/02", together with associated
collocation services ordered by Customer. The current monthly invoice for such
collocation is [********].

         (c) After execution of this Agreement, any requests by Customer for
racks at the Collocation Sites set forth in Exhibit A shall be considered a
request for Additional Services as defined below.

3.3 BASIC SERVICES. At each Collocation Site, Provider will provide to Customer
the number of racks specified in Exhibit A, plus HVAC, and 30 amps of negative
48v DC power per rack (collectively, the "Basic Services"). A rack space shall
be adequate to contain a rack (measuring 26 inches (width) x 24 inches (depth) x
78 or 84 inches (height)). The total linear inches for Customer rack space
within each location shall not exceed the sum of the number of rack spaces for
such location multiplied by 26 inches. To the extent Provider has additional
available and uncommitted collocation

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space and power at the Collocation Sites, Customer may order additional Basic
Services. Customer shall use the standard Provider procedures for ordering such
additional Basic Services.

3.4 ADDITIONAL SERVICES. Customer may request in writing separate caged access,
installation services, AC power or additional DC power, additional back-up
power, technical assistance, additional space or racks, cross-connects, or
additional HVAC (collectively referred to as the "Additional Services") at any
Collocation Site. Within thirty (30) business days after receiving such written
request, Provider shall notify Customer whether the Additional Services are
available and, if they are, Provider's standard rates for the Additional
Services as set forth in Section 2.2(b). Customer shall provide written notice
to Provider confirming its request for such Additional Services at the quoted
rates prior to Provider providing such Additional Services. If upgrades or
expansions to a Collocation Site or its facilities are necessary to accommodate
Customer's request, Provider may charge the entire Costs of such upgrades or
expansions to Customer to be paid in advance.

3.5 DELIVERY AND INSTALLATION.

         (a) No later than sixty (60) days prior to Customer's desired
Installation Date at any Collocation Site, Customer shall provide to Provider
the "Collocation Notice." The Collocation Notice shall include notice of
Customer's desire to collocate in a particular Collocation Site, a copy of
Customer's construction design drawings and installation schedule. The
Collocation Notice shall also include: (a) Customer's requested installation
date(s); (b) any excess cable storage requirements; (c) identification of all
Customer Equipment to be installed; (d) a diagram of the desired location of the
Customer Equipment; (e) the space, power, environmental and other requirements
for the Customer Equipment; (f) all other information reasonably required by
Provider. Within thirty (30) business days of receiving the Collocation Notice,
Provider shall respond with its acceptance or rejection.

         (b) Customer shall, at its expense, cause Customer Equipment to be
delivered, installed, and maintained in a safe condition and meeting or
exceeding the standards of Provider. Provider shall allow Customer reasonable
access to each Collocation Site for purposes of installing Customer Equipment,
provided that, if a Collocation Site is not ready for installation of equipment
other than security, alarm, HVAC, power, back-up power or other common systems
on such date, Provider shall allow such access within five (5) days of the first
date such Collocation Site is ready for such installation. Provider shall
provide Customer with at least thirty (30) days notice prior to the date it
estimates each Collocation Site will be ready for installation of Customer
Equipment.

3.6 ALARMS.

         (a) Provider shall continuously monitor Collocation Site security,
environmental, and power alarms at one or more manned monitoring centers. At
Customer's request, Provider shall establish procedures to allow Customer, at
Customer's expense, to share or (at Provider's option) receive indirectly
security and environmental alarm information where technically feasible.

         (b) Each Party shall promptly notify the other of any matters
pertaining to any damage or impending damage to or loss of the use of
Collocation Site or surrounding premises that are known to it and that could
reasonably be expected to adversely affect the Collocation Site.

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3.7 COLLOCATION SITE MAINTENANCE. Customer shall provide all maintenance and
repair of Customer Equipment. Any improvement, modification, addition to,
relocation, or removal of Customer Equipment, shall be subject to Provider's
prior review and written approval. Customer shall pay the cost of such
improvement, modification, addition to, relocation, or removal of, the Customer
Equipment. Provider's approval will not be unreasonably withheld. Provider's
maintenance responsibility shall be limited to the demarcation point and the
associated cross connect at that point.

3.8 USE OF CUSTOMER EQUIPMENT.

         (a) POWER USE. Customer shall not install any electrical or other
equipment that overloads any electrical paneling, circuitry, or wiring.

         (b) STANDARDS. Customer shall ensure that Customer Equipment is
installed, operated, and maintained to meet or exceed any reasonable
requirements of Provider, any requirements of Provider's building management or
insurance underwriters, and any applicable local, state and federal codes and
public health and safety laws and regulations (including fire regulations and
the National Electric Code).

         (c) INTERVENTION. If any part of the Customer Fibers or Customer
Equipment is not placed and maintained in accordance with the terms and
conditions of this Agreement and Customer fails to correct the violation within
(i) ten (10) days if the violation creates a life safety hazard, or (ii) thirty
(30) days for any other violation, each from receipt of written notice thereof
from Provider, then Provider may, at its option, without further notice to
Customer, correct the deficiency at Customer's expense without liability (except
to the extent the Agreement permits recovery for Provider's gross negligence)
for damages to the fiber, Customer Equipment or for any interruption of
Customer's services. As soon as practicable thereafter, Provider shall advise
Customer in writing of the work performed or the action taken. Customer shall
reimburse Provider for all Costs reasonably incurred by Provider associated with
any work or action performed by Provider pursuant hereto.

         (d) THREAT TO PERSONS OR PROPERTY. If Provider determines that
Customer's actions or failure to fulfill an obligation of this Agreement, or its
Customer Equipment poses an immediate threat to the safety of Provider's
employees or the public, interferes with the performance of Provider's service
obligations, or poses an immediate threat to the physical integrity of
Provider's facilities, Provider may perform such work and/or take such action
that it deems necessary without notice to Customer and without subjecting itself
to any liability (except to the extent the Agreement permits recovery for
Provider's gross negligence) for damage to the fiber, Customer Equipment or for
any interruption of Customer's services. As soon as practicable thereafter,
Provider shall advise Customer in writing of the work performed or the action
taken. Customer shall reimburse Provider for all expenses reasonably incurred by
Provider associated with any work or action performed by Provider pursuant
hereto. Customer shall remit payment to Provider within thirty (30) calendar
days from its receipt of Provider's invoice therefor.

3.9 ACCESS TO COLLOCATION SITE. Provider shall provide Customer with escorted
twenty-four hour access to Customer's assigned racks and, as reasonably
necessary, other portions of Provider's common space. Customer agrees to pay the
fees set forth in Section 2.2(d) for escorted access. To obtain such

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access, Customer shall provide Provider with reasonable advance notice and
Provider shall provide escorted access. Provider shall use reasonable efforts to
respond to emergency requests for such access.

         (a) NOTICE. Customer shall notify Provider Network Operations Center
prior to entering a Collocation Site and shall comply with any reasonable
Provider notice procedures.

         (b) SECURITY. Customer shall abide by Provider's reasonable security
requirements. When deemed appropriate by Provider, Customer employees,
customers, or representatives shall be issued passes or visitor identification
cards which must be presented upon request before entry to Collocation Sites and
surrendered upon demand or upon termination of the Agreement. Such passes or
other identification shall be issued only to persons meeting any reasonable
security criteria applicable at the relevant Collocation Site for such purpose.
Nothing in this Subsection shall be construed as preventing Customer from having
twenty-four hour escorted access to Collocation Sites.

         (c) RIGHT TO TERMINATE INDIVIDUAL'S ACCESS. Notwithstanding any other
provision of this Agreement, Provider shall, without threat of liability, have
the right to immediately terminate the right of access of any Customer personnel
or representative should it determine in its sole discretion for any lawful
reason that termination of such access is in its best interest. Provider shall
promptly notify Customer of any such termination, and Customer shall have a
reasonable opportunity to demonstrate that the terminated rights of access
should be reinstated. Any termination of a specific individual's access shall
remain in effect pending Provider's final determination as to the advisability
of such reinstatement.

(d) REMOVAL OF CUSTOMER EQUIPMENT. Within sixty (60) days after the end of the
Term or Customer's abandonment of any collocation arrangement at a Collocation
Site, Customer shall remove all Customer Equipment from the System or any other
Provider facilities at Customer's sole cost under Provider's supervision.
Customer shall provide Provider with at least sixty (60) days' notice prior to
such removal. If Customer fails to remove the same within said sixty-day period,
Provider shall either:

               (i) remove Customer's Equipment and issue an invoice to Customer
          for the cost of removal and storage; or

               (ii) notify Customer that Provider elects to take ownership of
          such abandoned Customer Equipment, in which case Customer shall
          execute a bill of sale or other document evidencing Provider's title
          to such Customer Equipment.

3.10 NO RESTRICTIONS. Provider's right to maintain and operate its facilities in
such a manner as will best enable it to fulfill its own service requirements is
in no manner limited by this Agreement, except as specifically set forth in this
Agreement.

3.11 INSPECTIONS. Provider reserves the right to make periodic inspections of
any part of the Collocation Sites; provided that Customer shall have the right
to have one or more of its employees or representatives present during the time
of any such inspection. Provider shall give Customer advance notice of such
inspections, except in those instances where Provider determines that safety
considerations justify the need for such an inspection without the delay of
providing notice. The making of periodic inspections or the failure to do so
shall not operate to impose upon Provider any

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liability of any kind whatsoever nor relieve Customer of any responsibility,
obligation, or liability allocated to it in this Agreement.

3.12 LIENS AND ENCUMBRANCES. Customer shall not have the power, authority or
right to create and shall not permit any lien or encumbrance, including, without
limitation, tax liens, mechanics' liens, or other liens or encumbrances with
respect to work performed, in connection with the installation, repair,
maintenance or operation of its Customer Equipment or other property installed
within the Collocation Site.

3.13 SUBORDINATION. Customer's rights under this Agreement shall be totally
subordinate to any bona fide mortgages, loans, deeds of trust, or any other
borrowing upon the real or personal property which may be incurred by Provider.
Customer shall sign any such reasonable documents as are necessary to satisfy
any lender, private or institutional, to reflect said subordination.

3.14 INDEPENDENT PARTIES. The presence of a Provider or Customer employee or
representative (as an inspector or otherwise) while an employee or
representative of the other party is at the Collocation Site or performing work
pursuant to this Agreement shall not make either party liable for the actions of
the other party and shall not be deemed to waive the responsibility of either
party to perform its obligations in a safe and workmanlike manner.

                        ARTICLE IV. INTENTIONALLY OMITTED

                                 ARTICLE V. TERM

5.1 TERM. The Term of this Agreement begins on the Effective Date and expires
co-terminously with the Fiber Lease Agreement.

5.2 EFFECT OF TERMINATION. No termination of this Agreement shall affect the
rights or obligations of any Party hereto:

                  (a) with respect to any payment hereunder for services
         rendered prior to the date of termination;

                  (b) pursuant to Articles VII (Audit Rights), X
         (Indemnification), XI (Limitation of Liability), XII (Insurance), XIII
         (Taxes), XV (Confidentiality), XVI (Prohibition on Improper Payments),
         XVIII (Settlement of Disputes), or XIX (Rules of Construction) or
         Sections 8.2 (Disclaimer of Warranty) or 8.3 (No Third-Party
         Warranties); or

                  (c) pursuant to other provisions of this Agreement that, by
         their sense and context, are intended to survive termination of this
         Agreement.

                     ARTICLE VI. CUSTOMER FIBER MAINTENANCE

6.1 MAINTENANCE SERVICES. During the Term of this Agreement, Provider shall
provide, or cause to be provided by contractors selected by Provider, emergency
and non-emergency maintenance and repair of the Customer Fibers all pursuant to
the operations specifications set forth in Exhibit B. Provider, at

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Customer's sole expense and at Provider's or its subcontractor's then prevailing
rates, shall perform maintenance and repair necessitated by Customer's
negligence or willful misconduct or Customer's elective maintenance or repair
requests.

6.2 MAINTENANCE OF CUSTOMER'S EQUIPMENT EXCLUDED. Provider shall have no
obligation under this Agreement to maintain, repair or replace Customer's
Equipment.

6.3 NO UNAUTHORIZED ACCESS TO SYSTEM. Customer shall not access the Customer
Fibers (other than pursuant to this Agreement).

6.4 RELOCATION. If Provider is required to relocate the Customer Fibers,
Provider shall give Customer not less than 180 calendar days' prior written
notice (unless Provider has received less than 180 days' notice, in which case
Provider shall give notice to Customer as promptly as reasonably practicable
after Provider receives such notice or determines that a relocation is
necessary) of such relocation. Provider shall use commercially reasonable
efforts to arrange for such relocation as promptly as practicable. Provider
shall provide Customer with updated as-built drawings with respect to any
relocated portion of the relocated System not later than 180 calendar days
following the completion of such relocation. Provider shall perform any
relocation such that: (a) the relocated facilities shall be constructed and
tested in accordance with the specifications and requirements set forth in the
Fiber Lease Agreement, including the applicable Exhibits; (b) the relocation
shall not result in a materially adverse change to the operations, performance,
or interconnections of Customer, or the end points or meet points of the
Customer Fibers; (c) the relocation maintains diversity of Customer Fibers, if
diversity existed prior to the relocation; and (d) the relocation shall not
unreasonably interrupt service on the Customer Fibers. Customer shall receive at
least twenty-one (21) calendar days advance notice of any interruption in
service of Customer Fibers which will be caused by a relocation, and such
relocation shall be coordinated such that any interruption shall only occur
between the hours of 12 midnight and 6 A.M. local time on Saturdays and Sundays.

                            ARTICLE VII. AUDIT RIGHTS

Each party shall keep such books and records (which shall be maintained on a
consistent basis and substantially in accordance with generally accepted
accounting principles) as shall readily disclose the basis for any charges
(except charges fixed in advance by this Agreement or by separate agreement of
the parties) or credits, ordinary or extraordinary, billed or due to the other
party under this Agreement and shall make them available for examination, audit,
and reproduction by the other party and its agents for a period of one year
after such charge or credit is billed or due. To the extent a party seeks
reimbursement of out-of-pocket costs or services provided on a per-hour basis,
it shall provide reasonable supporting documentation to the other party.

                            ARTICLE VIII. WARRANTIES

8.1 AGREEMENT VALIDITY. Each party represents and warrants that: (a) it has the
full right and authority to enter into, execute, deliver and perform its
obligations under this Agreement; (b) it has taken all requisite corporate
action to approve the execution, delivery and performance of this Agreement; (c)
this Agreement constitutes a legal, valid and binding obligation enforceable
against such party in accordance with its terms; (d) its execution of and
performance under this Agreement

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shall not violate any applicable existing regulations, rules, statutes or court
orders of any local, state or federal government agency, court or body; and (e)
it has the right pursuant to such party's Right-of-Way Authorizations to grant
the rights to the other party as set forth in this Agreement.

8.2 DISCLAIMER OF WARRANTY. EXCEPT AS SPECIFICALLY SET FORTH IN THIS AGREEMENT,
PROVIDER MAKES NO WARRANTY TO CUSTOMER OR ANY OTHER PERSON OR ENTITY, WHETHER
EXPRESS, IMPLIED, OR STATUTORY, AS TO THE DESCRIPTION, QUALITY, MERCHANTABILITY,
COMPLETENESS OR FITNESS FOR ANY PURPOSE OF ANY FIBERS OR ANY SERVICE PROVIDED
HEREUNDER OR DESCRIBED HEREIN, OR AS TO ANY OTHER MATTER, ALL OF WHICH
WARRANTIES ARE HEREBY EXCLUDED AND DISCLAIMED.

8.3 NO THIRD-PARTY WARRANTIES. NO FACILITY OWNERS/LENDERS HAVE MADE ANY
REPRESENTATION OR WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, TO CUSTOMER
CONCERNING PROVIDER, CUSTOMER FIBERS OR AS TO ANY OF THE MATTERS SET FORTH IN
SECTIONS 8.1 OR 8.2. NO CUSTOMER LENDERS HAVE MADE ANY REPRESENTATION OR
WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, TO PROVIDER CONCERNING CUSTOMER,
CUSTOMER FIBERS OR AS TO ANY OF THE MATTERS SET FORTH IN THIS AGREEMENT.

                               ARTICLE IX. DEFAULT

9.1 TERMINATION UPON DEFAULT. Either party, upon written notice to the other
party after the other party's default and the other party's failure to cure any
default in the performance of any material obligation hereunder prior to the end
of the applicable cure period, may terminate this Agreement as herein provided,
provided that at the time of termination such default remains uncured.

9.2 SPECIFIC DEFAULT EVENTS. Events of default shall include but not be limited
to: (a) the making of a general assignment for the benefit of the defaulting
party's creditors; (b) the filing of a voluntary petition in bankruptcy or the
filing of a petition in bankruptcy or other insolvency protection against the
defaulting party which is not dismissed within 90 calendar days thereafter; (c)
the filing by the defaulting party of any petition or answer seeking, consenting
to, or acquiescing in reorganization, arrangement, adjustment, composition,
liquidation, dissolution, or similar relief; (d) any violation by Customer of
the restrictions set forth in Article 20.

9.3 CURE PERIOD. The cure period applicable to Section 9.1 shall be:

         (a) with respect to a default in payment, the period ending ten (10)
business days after a written notice of such default is given;

         (b) with respect to any other default, the period ending 30 calendar
days after a written notice of such default is given, provided, however, that if
such default cannot with reasonable diligence be cured within such 30-day
period, and such other party has commenced to effect a cure immediately upon
receipt of such notice, and diligently pursues such cure, then such cure period
will be extended for a period reasonably required to cure such default but in no
event more than an additional 30 calendar days.

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9.4 FAILURE TO CURE. Upon the failure by the defaulting party to timely cure any
such default after notice thereof from the other party, the other party may take
such action as it determines, in its sole discretion, to be necessary to correct
the default, and pursue any legal remedies it may have under this Agreement,
applicable law, or principles of equity relating to such breach.

9.5 WAIVER OF SPECIFIC DEFAULTS. Any event of default by the defaulting party
may be waived under the terms of this Agreement at the other party's option. Any
such waiver shall be in writing.

9.6 DISPUTED AMOUNTS. Notwithstanding the other provisions of this Article,
failure to pay an amount subject to a bona fide dispute shall not be an event of
default to the extent the disputed amount is (a) less than $100,000 or (b) paid
into an escrow account of a nationally chartered domestic bank to be established
by the parties within thirty (30) days of the Effective Date of this Agreement.

                           ARTICLE X. INDEMNIFICATION

10.1 INDEMNITY. Each party shall indemnify, defend, protect and hold harmless
the other party, its employees, officers, directors, agents, shareholders,
affiliates, Facility Owners/Lenders, and other parties to Right-of-Way
Authorizations that are entitled to indemnity by such indemnifying party (the
"Indemnitor"), from and against, and assumes liability for:

         (a) Any injury, loss or damage to any person, tangible property or
facilities of any person or entity (including reasonable attorneys' fees and
costs), to the extent arising out of or resulting from the acts or omissions,
negligent or otherwise, of the indemnifying party, its officers, employees,
servants, affiliates, agents or contractors in connection with its performance
under this Agreement; and

         (b) Any claims, liabilities or damages arising out of any violation by
the indemnifying party of regulations, rules, statutes or court orders of any
local, state or federal governmental agency, court or body in connection with
its performance under this Agreement.

10.2 NO LIMITATION ON CLAIMS AGAINST OTHER PARTIES. Except as set forth herein,
and subject to the terms of any underlying agreements between Provider and any
third person, nothing contained herein shall operate as a limitation on the
right of either party hereto to bring an action for damages against any third
person, including indirect, special or consequential damages, based on any acts
or omissions of such third person as such acts or omissions may affect the
construction, operation or use of the Customer Fibers; provided, however, that
each party hereto shall assign such rights of claims, execute such documents and
do whatever else may be reasonably necessary to enable the other party to pursue
any such action against such third person.

10.3 NOTICE. Provider and Customer agree to promptly provide each other with
notice of any claim which may result in an indemnification obligation hereunder.
The Indemnitor may defend such claim with counsel of its own choosing provided
that no settlement or compromise of any such claim shall occur without the
consent of the other Party, which consent shall not be unreasonably withheld or
delayed.

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10.4 MATERIAL AND CONTINUING OBLIGATION. Each Party's obligation to indemnify,
defend, protect, and save the other Party harmless is a material obligation to
the continuing performance of the other Party's obligations hereunder.

                       ARTICLE XI. LIMITATION OF LIABILITY

11.1 RESTRICTION ON TYPES OF LIABILITY. NOTWITHSTANDING ANY PROVISION OF THIS
AGREEMENT TO THE CONTRARY, IN NO EVENT SHALL EITHER PARTY BE LIABLE TO THE OTHER
PARTY FOR ANY SPECIAL, INCIDENTAL, INDIRECT, PUNITIVE, RELIANCE OR CONSEQUENTIAL
DAMAGES, WHETHER FORESEEABLE OR NOT, ARISING OUT OF, OR IN CONNECTION WITH THIS
AGREEMENT, IN TORT, BREACH OF CONTRACT, BREACH OF WARRANTY, STRICT LIABILITY OR
ANY OTHER CAUSE OF ACTION, INCLUDING DAMAGE OR LOSS OF PROPERTY OR EQUIPMENT,
LOSS OF PROFITS OR REVENUE, COST OF CAPITAL, COST OF REPLACEMENT SERVICES, OR
CLAIMS OF CUSTOMERS, WHETHER OCCASIONED BY ANY REPAIR OR MAINTENANCE PERFORMED
BY, OR FAILED TO BE PERFORMED BY, THE FIRST PARTY OR ANY OTHER CAUSE WHATSOEVER.

11.2 NO RECOURSE AGAINST RELEASED PARTIES. Neither party shall have any recourse
of any kind against any Released Party or any assets of a Released Party under
this Agreement, it being expressly agreed and understood that no liability
whatever shall attach to or be incurred by any Released Party under or by reason
of this Agreement or any other instrument, arrangement or understanding related
to Customer Fibers or Collocation Sites. Each party waives all such recourse to
the extent set forth in this Section on behalf of its successors, assigns, and
any entity claiming by, through, or under such party.

11.3 NO PERSONAL LIABILITY. Each action or claim against any party arising under
or relating to this Agreement shall be made only against such party as a
corporation, and any liability relating thereto shall be enforceable only
against the corporate assets of such party. No party shall seek to pierce the
corporate veil or otherwise seek to impose any liability relating to, or arising
from, this Agreement against any shareholder, employee, officer, director or
agent of the other party. Each of such persons is an intended beneficiary of the
mutual promises set forth in this Section and shall be entitled to enforce the
obligations or provisions of this Section.

11.4 PURSUIT OF ACTIONS AGAINST UNDERLYING LANDLORDS. Notwithstanding the
foregoing provisions of this Article, AND ONLY TO THE EXTENT PROVIDER IS
REQUIRED under the terms and provisions of any underlying lease or agreement to
indemnify an Underlying Landlord from and against any and all claims, suits,
judgments, liabilities, losses and expenses (hereinafter "Lease Claims") arising
out of service interruption, cessation, unreliability of or damage to the
Collocation Site, regardless of whether such Lease Claims arise from the sole or
partial negligence, willful misconduct or other action or inaction of such
Underlying Landlord, Customer hereby releases such Underlying Landlord, and
hereby waives, all Lease Claims arising out of service interruption, cessation,
unreliability of or damage to the Collocation Site regardless of whether such
claims, suits, judgments, liabilities, losses or expenses arise from the sole or
partial negligence, willful misconduct or other action or inaction, of such
Underlying Landlord. Customer shall notify Provider in writing before pursuing
any such Lease Claim against an Underlying Landlord and such notification shall
make specific reference to this provision of the Agreement, and Provider shall
respond in writing within sixty (60) days after receipt of such

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notification as to whether or not the terms of such underlying lease require
Customer to release and waive such Lease Claim against the Underlying Landlord
in question.

                             ARTICLE XII. INSURANCE

12.1 OBLIGATION TO OBTAIN. During the Term of this Agreement, the parties shall
each obtain and maintain not less than the following insurance:

         (a) Commercial General Liability Insurance, including coverage for
sudden and accidental pollution legal liability, with a combined single limit of
$10,000,000 for bodily injury and property damage per occurrence and in the
aggregate; provided that such coverage may be obtained through a combination of
specific and umbrella or excess liability policies.

         (b) Worker's Compensation Insurance in amounts required by applicable
law and Employers Liability Insurance with limits not less than $1,000,000 each
accident. If a party is to perform work in Nevada, North Dakota, Ohio,
Washington, Wyoming, or West Virginia, the party shall participate in the
appropriate state fund(s) to cover all eligible employees and provide a stop gap
endorsement.

         (c) Automobile Liability Insurance with a combined single limit of
$2,000,000 for bodily injury and property damage per occurrence, to include
coverage for all owned, non-owned, and hired vehicles; provided that such
coverage may be obtained through a combination of specific and umbrella or
excess liability policies.

If the Landlord imposes more stringent insurance requirements pursuant to the
relevant lease (as it may be modified from time to time), Customer shall
promptly comply with the Landlord's requirements, after receiving written notice
of such requirements. Provider shall, upon Customer's request, provide a copy of
the relevant provisions of the lease to Customer, to the extent such disclosure
is not prohibited by the terms of the lease.

The limits set forth in this Section are minimum limits and shall not be
construed to limit the liability of either party.

12.2 POLICY REQUIREMENTS. Each party shall obtain and maintain the insurance
policies required above with companies rated A- or better by Best's Key Rating
Guide or with a similar rating by another generally recognized rating agency.
The other party, its Affiliates, officers, directors, and employees, and any
other party entitled to indemnification hereunder shall be named as additional
insureds to the extent of such indemnification. Each party shall provide the
other party with an insurance certificate confirming compliance with the
insurance requirements of this Article. The insurance certificate shall indicate
that the other party shall be notified not less than 30 calendar days prior to
any cancellation or material change in coverage. If either party provides any of
the foregoing coverages through a claims made policy basis, that party shall
cause such policy or policies to be maintained for at least three years beyond
the expiration of this Agreement.

12.3 WAIVER OF SUBROGATION. The parties shall each obtain from the insurance
companies providing the coverages required by this Agreement a waiver of all
rights of subrogation or recovery in favor of

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the other party and, as applicable, its members, managers, shareholders,
Affiliates, assignees, officers, directors, and employees or any other party
entitled to indemnity under this Agreement to the extent of such indemnity.

12.4 BLANKET POLICIES; SELF-INSURANCE. Nothing in this Agreement shall be
construed to prevent either party from satisfying its insurance obligations
pursuant to this Agreement (a) under a blanket policy or policies of insurance
that meet or exceed the requirements of this Article or (b) with respect to the
insurance required in Sections 12.1(b) and (c), with the consent of the other
party, which consent shall not be unreasonably withheld, self-insurance.

                               ARTICLE XIII. TAXES

13.1 TAXES. Provider shall be responsible for all ad valorem property taxes
relating to portions of its network, excluding the Customer Fibers, as well as
any taxes required for the provision of the maintenance and collocation services
under this Agreement.

13.2 COOPERATION. Provider and Customer acknowledge and agree that it is their
mutual objective and intent to minimize to the extent feasible all taxes and
that they will cooperate with each other and coordinate their mutual efforts to
achieve such objectives in accordance with the provisions of this Article. The
Parties shall cooperate in any contest of any taxes or fees and in making tax
related reports and filings, so as to avoid, to the extent reasonably possible,
prejudicing the interests of the other Party.

                               ARTICLE XIV. NOTICE

14.1 NOTICE ADDRESSES. Unless otherwise provided in this Agreement, all notices
and communications concerning this Agreement shall be in writing and addressed
to the other Party as follows:

If to Customer:            Metromedia Fiber National Network, Inc.
                           Attn:  President
                           360 Hamilton Avenue
                           White Plains, New York 10601
                           Facsimile:  (914) 421-7550

with a copy to:            Metromedia Fiber National Network, Inc.
                           Attn: General Counsel
                           One North Lexington Avenue
                           White Plains, New York 10601
                           Facsimile:  (914) 421-6793

If to Provider:            Williams Communications, LLC
                           Attn:  Contract Management
                           One Technology Center, MD-6H
                           Tulsa, Oklahoma 74103
                           Facsimile No.:  (918) 547-0460

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with a copy to:            Williams Communications, LLC
                           Attn:  IRU Administration
                           One Technology Center, TC-8A
                           Tulsa, OK 74103
                           Facsimile:  (918) 547-2991

and                        Williams Communications, LLC
                           Attn:  General Counsel
                           One Technology Center, TC-15A
                           Tulsa, Oklahoma 7415
                           Facsimile:  (918) 547-2630

or at such other address as may be designated in writing to the other Party.

14.2 NOTICE AND INVOICE DELIVERY. Unless otherwise provided herein, notices and
invoices shall be: (a) hand delivered, (b) sent by registered or certified U.S.
Mail, postage prepaid, (c) by commercial overnight delivery service, or (d)
transmitted by facsimile, and shall be deemed served or delivered to the
addressee or its office when received at the address for notice specified above
when hand delivered, three (3) United States Postal Service business days after
deposit in the mail when sent by U.S. mail on the day after being sent when sent
by overnight delivery service, and upon confirmation of sending when sent by
facsimile.

                           ARTICLE XV. CONFIDENTIALITY

15.1 CONFIDENTIALITY OBLIGATION. If either Party provides confidential
information to the other or, if in the course of performing under this Agreement
or negotiating this Agreement a Party learns confidential information regarding
the facilities or plans of the other, the receiving Party shall (a) protect the
confidential information from disclosure to third parties with the same degree
of care accorded its own confidential and proprietary information, but in any
case with at least reasonable care and (b) refrain from using such confidential
information except in negotiating or performing under this Agreement.
Notwithstanding the above, a Party may provide such confidential information to
its directors, officers, members, managers, employees, agents, and contractors,
consultants ("Representatives"), Affiliates, contractors, financial
institutions, lenders, Underlying Landlords, potential assignees (who are bound
by a written agreement restricting use and disclosure of confidential
information), and Representatives of Affiliates, in each case whose access is
reasonably necessary. Each such recipient of confidential information shall be
informed by the Party disclosing confidential information of its confidential
nature, and shall be directed to treat such information confidentially and shall
agree to abide by these provisions. In any event, each Party shall be liable
(with respect to the other Party) for any breach of this provision by any entity
to whom that Party discloses confidential information. The terms of this
Agreement (but not its execution or existence) shall be considered confidential
information for purposes of this Article, except as set forth in Section 15.3.
The obligations set forth in this Section shall survive expiration or
termination of this Agreement for a period of two (2) years, except that, with
respect to any confidential information designated by the disclosing Party as a
trade secret, and entitled to protection as such, the obligations set forth in
this Section shall survive such expiration or termination indefinitely.

                                       17
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

15.2 PERMITTED DISCLOSURES. Notwithstanding any other provision herein, neither
Provider nor Customer shall be required to hold confidential any information
that:

         (a) becomes publicly available other than through the recipient;

         (b) is required to be disclosed by a governmental, regulatory
authority, or judicial order, rule, or regulation or proceedings with respect to
this Agreement or a Party's obligations as a publicly held company, provided
that a Party subject to such requirement shall promptly notify the other Party
of such requirement;

         (c) is independently developed by the disclosing Party;

         (d) becomes available to the disclosing Party without restriction from
a third party;

         (e) to the extent disclosure by the receiving Party as required by
applicable law or regulation.

15.3 GOODWILL AND PUBLICITY. Neither Party shall use the name, trade name,
service mark, or trademark of the other in any promotional or advertising
material without the prior written consent of the other. Provided each Party
consents, the Parties shall coordinate and cooperate with each other when making
public announcements related to the terms of this Agreement and each Party shall
have the right to promptly review, comment upon, and approve any publicity
materials, press releases, or other public statements by the other Party that
refer to, or that describe any aspect of, this Agreement.

                  ARTICLE XVI. PROHIBITION ON IMPROPER PAYMENTS

Neither Party shall use any funds received under this Agreement for illegal or
otherwise "improper" purposes. Neither Party shall pay any commission, fees or
rebates to any employee of the other Party. If either Party has reasonable cause
to believe that one of the provisions in this Article has been violated, it, or
its representative, may audit the books and records of the other Party for the
sole purpose of establishing compliance with such provisions, to the extent
reasonably necessary.

                   ARTICLE XVII. FORCE MAJEURE; EMINENT DOMAIN

17.1 EXCUSED PERFORMANCE. Neither Provider nor Customer shall be in default
under this Agreement with respect to any delay in its performance (other than
the payment of monetary amounts due under this Agreement) caused by any Force
Majeure Event. The Party claiming relief under this Article shall promptly
notify the other in writing of the existence of the Force Majeure Event relied
on, the expected duration of the Force Majeure Event, and the cessation or
termination of the Force Majeure Event. The Party claiming relief under this
Article shall exercise commercially reasonable efforts to minimize the time for
any such delay.

17.2 EMINENT DOMAIN. Should any portion of a Collocation Site or the Customer
Fibers be acquired by eminent domain, nationalization, or expropriation (each of
which, a "Taking") by any authority or entity possessing such power, then each
Party shall be excused from performance of its obligations to the extent
provided in Section 17.1. Provider shall give Customer notice of any proposed
Taking

                                       18
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

within fifteen (15) days of Provider itself receiving notice of any proceedings.
In the proceeding for any such Taking or an involuntary discontinuance of the
use of a portion of the Collocation Site or the Customer Fibers in anticipation
of a Taking, the interests of Customer and Provider in the affected portion
shall be severed. Any awards resulting from the proceeding or otherwise provided
shall be allocated between Customer and Provider in accordance with such
interests. In addition, Customer and Provider shall each be entitled to claim
and receive the portion of the total award attributable to its interest in the
affected assets and may claim damages payable on account of relocation or
re-routing expenses relating to the Taking.

                      ARTICLE XVIII. SETTLEMENT OF DISPUTES

18.1 OBLIGATION TO ARBITRATE. Any dispute or disagreement relating to this
Agreement or any matter arising between Customer and Provider in connection with
this Agreement which is not settled to the mutual satisfaction of Customer and
Provider within 30 calendar days from the date that either party informs the
other in writing that such dispute or disagreement exists, shall be settled by
arbitration by a single arbitrator in Chicago, Illinois, in accordance with the
Commercial Arbitration Rules of the American Arbitration Association in effect
on the date that such notice is given. If the parties are unable to agree on a
single arbitrator within fifteen calendar days, the American Arbitration
Association shall select an arbitrator. The decision of the arbitrator shall be
final and binding upon the parties and shall include written findings of law and
fact, and judgment may be obtained thereon by either party in a court of
competent jurisdiction. Each party shall bear the cost of preparing and
presenting its own case. The cost of the arbitration, including the fees and
expenses of the arbitrator, shall be shared equally by the parties unless the
award otherwise provides.

18.2 EXCEPTIONS TO ARBITRATION OBLIGATION. The obligation herein to arbitrate
shall not be binding upon any party with respect to requests for preliminary
injunctions, temporary restraining orders or other procedures in a court of
competent jurisdiction to obtain interim relief when deemed necessary by such
court to preserve the status quo or prevent irreparable injury pending
resolution by arbitration of the actual dispute.

                       ARTICLE XIX. RULES OF CONSTRUCTION

19.1 INTERPRETATION. The captions or headings in this Agreement are strictly for
convenience and shall not be considered in interpreting this Agreement or as
amplifying or limiting any of its content. Words in this Agreement that import
the singular connotation shall be interpreted as plural, and words that import
the plural connotation shall be interpreted as singular, as the identity of the
Parties or objects referred to may require. References to "person" or "entity"
each include natural persons and legal entities, including corporations, limited
liability companies, partnerships, sole proprietorships, business divisions,
unincorporated associations, governmental entities, and any entities entitled to
bring an action in, or that are subject to suit in an action before, any state
or federal court of the United States. The word "including" means "including,
but not limited to." "Days" refers to calendar days, except that references to
"banking days" exclude Saturdays, Sundays and holidays during which nationally
chartered banks in the United States are authorized or required to close. Unless
expressly defined herein, words having well-known technical or trade meanings
shall be so construed.

                                       19
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

19.2 CUMULATIVE REMEDIES; INSURANCE. Except as set forth to the contrary herein,
any right or remedy of Provider or Customer shall be cumulative and without
prejudice to any other right or remedy, whether contained herein or not. The
provisions of Article XII (Insurance) shall not be construed as limiting the
Indemnitor's obligations pursuant to Article X (Indemnification) or other
provisions of this Agreement.

19.3 NO THIRD-PARTY RIGHTS. Nothing in this Agreement is intended to provide any
legal rights to anyone not an executing Party of this Agreement except under the
indemnification and insurance provisions and except that Underlying Landlord and
Facility Owners/Lenders shall be entitled to rely on and have the benefit of
Sections 8.3, 10.1, 11.2 and 11.3.

19.4 AGREEMENT FULLY NEGOTIATED. This Agreement has been fully negotiated
between and jointly drafted by Provider and Customer.

19.5 INDUSTRY STANDARDS. Except as otherwise set forth herein, for the purpose
of this Agreement the normal standards of performance within the
telecommunications industry in the relevant market shall be the measure of
whether a Party's performance is reasonable and timely.

19.7 CROSS REFERENCES. Except as the context otherwise indicates, all references
to Exhibits, Articles, Sections, Subsections, Clauses, and Paragraphs refer to
provisions of this Agreement.

19.8 LIMITED EFFECT OF WAIVER. The failure of either Provider or Customer to
enforce any of the provisions of this Agreement, or the waiver thereof in any
instance, shall not be construed as a general waiver or relinquishment on its
part of any such provision, but the same shall nevertheless be and remain in
full force and effect.

19.9 APPLICABLE LAW. The domestic laws of the State of New York, without
reference to its choice of law principles, shall govern this Agreement and it
shall be construed accordingly. The laws of such state shall govern all disputes
referred to arbitration and the statute of limitations and the remedies for any
wrongs that may be found.

19.10 SEVERABILITY. If any term, covenant or condition in this Agreement shall,
to any extent, be invalid or unenforceable in any respect under the laws
governing this Agreement, the remainder of this Agreement shall not be affected
thereby, and each term, covenant or condition of this Agreement shall be valid
and enforceable to the fullest extent permitted by law.

19.11 NO PARTNERSHIP CREATED. The relationship between Provider and Customer
shall not be that of partners, agents, or joint venturers for one another, and
nothing contained in this Agreement shall be deemed to constitute a partnership
or agency agreement between them for any purposes, including federal income tax
purposes. Provider and Customer, in performing any of their obligations
hereunder, shall be independent contractors or independent parties and shall
discharge their contractual obligations at their own risk.

                                       20
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

                             ARTICLE XX. ASSIGNMENT

20.1 RESTRICTIONS ON ASSIGNMENT. Except as provided in the second sentence of
this Section and Section 20.4, neither party shall assign or otherwise transfer
this Agreement or its rights or obligations hereunder to any other party without
the prior written consent of the other party, which consent shall not be
unreasonably withheld or delayed. Either party shall have the right, without the
other party's consent, to assign or otherwise transfer this Agreement in whole
or in part as collateral to any lender or to any of its Affiliate's or to any
corporation into which it may be merged or consolidated or which purchases all
or substantially all of its assets.

20.2 AGREEMENT BINDS SUCCESSORS. This Agreement and each of the parties'
respective rights and obligations under this Agreement, shall be binding upon
and shall inure to the benefit of the parties hereto and each of their
respective successors and permitted assigns. Any assignment or transfer shall be
subject to the other party's rights under this Agreement and any assignee or
transferee shall continue to perform the assigning party's obligations under
this Agreement.

20.3 CONDITIONS TO EFFECTIVE ASSIGNMENT. Except as otherwise stated herein, an
assignment (or other transfer) of this Agreement or a Party's rights or
obligations hereunder to any other party shall not be effective without (a)
either the prior written consent of the non-assigning party, or, if such consent
is not required, written notice to the non-assigning Party and (b) the written
agreement of the assignee to be bound by the indemnification provisions and
limitations on liability and recourse set forth in this Agreement.

20.4 TRANSFER OF COLLOCATION RIGHTS. Lessee shall not, directly or indirectly,
convey any interest in the rights granted herein with respect to any collocation
services provided to Lessee hereunder, or Lessee's right to occupy any
Collocation Sites or racks, to any other person, firm or entity, without the
prior written consent of Provider, which consent shall not unreasonably withheld
or delayed. Any conveyance by Customer of any collocation services shall not
release Customer of its duties, obligations and liabilities hereunder and any
and all of the rights and interests of the transferee of such collocation
services shall be subject to the terms and provisions of this Agreement.

20.5 CHANGE IN CONTROL NOT AN ASSIGNMENT. Notwithstanding any presumptions under
applicable state law that a change in control of a Party constitutes an
assignment of an agreement, a change in control of a Party, not made for
purposes of circumventing restrictions on assignment or of depriving the other
Party of rights under this Agreement, shall not be deemed an assignment for
purposes of this Agreement.

20.6 RIGHT TO SUBCONTRACT. Provider may subcontract for testing, maintenance,
repair, restoration, relocation, or other operational and technical services it
is obligated to provide hereunder or may have the underlying facility owner or
its contractor perform such obligations.

               ARTICLE XXI. ENTIRE AGREEMENT; AMENDMENT; EXECUTION

21.1 INTEGRATION; EXHIBITS. This Agreement constitutes the entire and final
agreement and understanding between Provider and Customer with respect to the
subject matter hereof and supersedes all prior agreements relating to the
subject matter hereof, which are of no further force or effect. The Exhibits
referred to herein are integral parts hereof and are made a part of this
Agreement by reference.

                                       21
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

21.2 NO PAROLE AMENDMENT. This Agreement may only be amended, modified, or
supplemented by an instrument in writing executed by duly authorized
representatives of Provider and Customer.

21.3 COUNTERPARTS. This Agreement may be executed in one or more counterparts,
all of which taken together shall constitute one and the same instrument.

21.4 FACSIMILE DELIVERY. This Agreement may be duly executed and delivered by a
Party by execution and facsimile delivery of the signature page of a counterpart
to the other Party, provided that, if delivery is made by facsimile, the
executing Party shall promptly deliver a complete counterpart that it has
executed to the other Party.

         IN WITNESS WHEREOF and in confirmation of their consent to the terms
and conditions contained in this Agreement and intending to be legally bound
hereby, Provider and Customer have executed this Agreement as of the Effective
Date.

WILLIAMS COMMUNICATIONS, LLC              METROMEDIA FIBER NATIONAL
                                          NETWORK, INC.

By:      /s/ Howard E. Janzen             By:      /s/ William G. La Perch
   ------------------------------            ------------------------------

Print Name:  Howard E. Janzen             Print Name:  William G. La Perch
           ----------------------                     ---------------------

Title:       President & CEO              Title:       President
      ---------------------------                --------------------------

                                       22
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

                                    EXHIBIT A

                                COLLOCATION SITES

                                   NOTATIONS:

1) Term Liability for transmission sites is to be calculated from Route
Acceptance date + 1825 days (5yrs * 365days)

2) Term Liability for Points of Presence (POPs) is to be calculated from the
Install complete date + 365 days (1yr * 365days)

3) Rack charges above the contract rate of $350.00 are only on racks that are
above the contractual commitment from Lessor.

4) N/A will be used to denote any site that has passed the END OF TERM for which
no Term Liability exists.

<Table>
<Caption>
                                                                                     RACKS                                    RACKS
                                                                TRANSMISSION SITE     PRE      END OF                          POST
         SELECTED SEGMENT                 POP LOCATIONS             LOCATIONS        6/1/02     TERM       RACK RATE          6/1/02
         ----------------                 -------------         -----------------    ------    ------      ---------          ------
<S>                                  <C>                        <C>                  <C>      <C>       <C>                  <C>

ATLN - WASH

ATLANTA, GA                           ATLANTA POP - 874 DEKALB AVENUE, ATLANTA, GA     0        N/A     [*****************]     0
                                      30307

Lawrenceville                                                 790 Mcart Rd.,           2      05/24/05  [*****************]     2
                                                              Lawrenceville, GA
                                                              30245

Athens (a\k\a Hull)                                           920 Smith Road,          2      05/24/05  [*****************]     2
                                                              Hull, GA 30646

Hartwell                                                      4260 Liberty Mill        6      05/24/05  [*****************]     6
                                                              Rd., Hartwell, GA
                                                              30643

Greenville                                                    9744 Augusta Rd.,        6      05/24/05  [*****************]     5
                                                              Greenville, SC 29669

SPARTANBURG, SC                       SPARTANBURG POP - BTC BUILDING, 145 N.           2        N/A     [*****************]     2
                                      CHURCH ST., SUITE 3, SPARTANBURG, SC 29306

York                                                          2154 Templeton Rd.,      6      05/24/05  [*****************]     6
                                                              Clover, SC 29710

CHARLOTTE, NC                         CHARLOTTE POP - 112 N. MEYERS ST.,               3        N/A     [*****************]     3
                                      CHARLOTTE, NC 28202

Salisbury (a\k\a Mt. Ulla)                                    295 Upright Rd., Mt.     2      05/24/05  [*****************]     2
                                                              Ulla, NC 28125

Kernersville Jct.                                             LOT #51M, 1334 Old       2      05/24/05  [*****************]     2
                                                              Salem Road,
                                                              Kernersville, NC
                                                              27284

SPUR TO GREENSBORO & RALEIGH, NC

GREENSBORO, NC                        GREENSBORO POP - SOUTH ELM CENTER, 201-E         0        N/A     [*****************]     0
                                      CREEK RIDGE ROAD, GREENSBORO, NC 27406

Chapel Hill                                                   6102 Old Greensboro      2      05/24/05  [*****************]     2
                                                              Rd., Chapel Hill, NC
                                                              27516

RALEIGH, NC                           RALEIGH POP - 3440 TARHEEL DRIVE, BLDG. #3,      2        N/A     [*****************]     0
                                      SUITE 105, RALEIGH, NC 27609

Reidsville                                                    1301 Ashley Loop,        2      05/24/05  [*****************]     2
                                                              Reidsville, NC 27320

Chatham                                                       945 Transco Rd.,         5      05/24/05  [*****************]     5
                                                              Chatham, VA 24531

Appomattox                                                    Hwy. 691 SW,             2      05/24/05  [*****************]     2
                                                              Appomattox, VA 24522

Scottsville Jct.                                              Highway 643,             4      05/24/05  [*****************]     2
                                                              Scottsville, VA 24590

SPUR TO RICHMOND, VA

Goochland                                                     3901 River Rd. West,     2      05/24/05  [*****************]     2
                                                              Goochland, VA 23063

RICHMOND, VA                          RICHMOND POP - 3600 W. BROAD ST., SUITE 472,     0        N/A     [*****************]     0
                                      RICHMOND, VA 23230

Unionville                                                    74444 Everona Rd.,       2      05/24/05  [*****************]     2
                                                              Unionville, VA 22587

Manassas                                                      10699 Piperlane,         2      05/24/05  [*****************]     2
                                                              Manassas, VA 20110

WASHINGTON, DC                        WASHINGTON DC POP - 1220 L ST. NW, SUITE         0        N/A     [*****************]     0
                                      200, WASHINGTON, DC 20005
----------------------------------------------------------------------------------------------------------------------------------
                     ROUTE RACK COUNT                                                                                          49
</Table>

                               Exhibit A - Page 1
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

<Table>
<S>                                  <C>                        <C>                  <C>      <C>       <C>                  <C>
HSTN - DLLS (IXC)

HOUSTON, TX                           HOUSTON POP - 1124 HARDY STREET, HOUSTON, TX     6        N/A     [*******************]  16
                                      77020

Richey Road                                                   300 Richey Road,         2      05/26/05  [*****************]     2
                                                              Houston TX, 77020

Willis (a\k\a Montgomery Co.)                                 16533 IH 45 NORTH,       2      05/26/05  [*****************]     2
                                                              Willis, TX 77378

Madison                                                       Route 2, Box 213,        2      05/26/05  [*****************]     2
                                                              Madisonville, TX
                                                              77864

Buffalo                                                       23433 IH 45 North,       2      05/26/05  [*****************]     2
                                                              Buffalo, TX 75831

Streetman                                                     16108 IH 45 North,       6      05/26/05  [*****************]     6
                                                              Streetman, TX 75859

Ennis                                                         3910 IH 45 North,        2      05/26/05  [*****************]     2
                                                              Ennis, TX 75120

DALLAS, TX                            DALLAS POP - ONE MAIN PLACE, 1201 MAIN           0        N/A     [*****************]     0
                                      STREET, SUITE C-112 DALLAS, TX 75202

----------------------------------------------------------------------------------------------------------------------------------
                     ROUTE RACK COUNT                                                                                          32

KSCY - DNVR

KANSAS CITY, MO                       KANSAS CITY POP - THE BRYANT BLDG., 1102         3        N/A     [*******************]  *5
                                      GRAND AVE. #300, KANSAS CITY, MO 64106

Lawrence                                                      13804 246th St.,         2      12/13/04  [*****************]     1
                                                              Lawrence, KS 66044

TOPEKA, KS                            TOPEKA POP - 101 SE MONROE, TOPEKA, KS 66603     2        N/A     [*****************]     1

Allen (a\k\a Miller)                                          1836 County Rd. 330,     2      12/13/04  [*****************]     1
                                                              Osage City, KS 66868

Elmdale                                                       RR 1, Elmdale,           6      12/13/04  [*****************]     6
                                                              Cottonwood Falls, KS
                                                              66850

Newton                                                        937 Falcon Road,         2      12/13/04  [*****************]     1
                                                              Newton, KS 67114

Inman                                                         380 Plum Ave.,           2      12/13/04  [*****************]     1
                                                              Inman, KS 67546

Ellinwood                                                     1150 E BARTON CO.        2      12/13/04  [*****************]     1
                                                              ROAD, Ellinwood, KS
                                                              67526

Bison                                                         Rural Rt. 1, Bison,      6      12/13/04  [*****************]     6
                                                              KS 67520

Ellis                                                         Rural Rt. 1, Ellis,      2      12/13/04  [*****************]     1
                                                              KS 67637

Grainfield                                                    1102 COUNTY ROAD 50,     2      12/13/04  [*****************]     1
                                                              Grainfield, KS 67737

Oakley (a\k\a Monument)                                       2317 Daydream Road,      2      12/13/04  [*****************]     1
                                                              Monument, KS 67747

Goodland                                                      5655 County Road         2      12/13/04  [*****************]     1
                                                              #16, Goodland, KS
                                                              67735

Burlington (a\k\a Bethune)                                    32353 County Rd. 40,     6      12/13/04  [*****************]     6
                                                              Burlington, CO 80805

Flagler                                                       7250 County Rd. HH,      2      12/13/04  [*****************]     1
                                                              Flagler, CO 80815

Woodrow                                                       1018 HIGHWAY 71,         2      12/13/04  [*****************]     1
                                                              Woodrow, CO 80757

Strasburg                                                     2598 S County Rd.,       2      12/13/04  [*****************]     1
                                                              157, Strasburg, CO
                                                              80136

DENVER, CO                            910 15TH ST., SUITE 716, DENVER, CO 80202        8        N/A     [*****************]     0

----------------------------------------------------------------------------------------------------------------------------------
                     ROUTE RACK COUNT                                                                                          36

LSAN - SNDG

LOS ANGELES, CA                       ONE WILSHIRE BLDG., 624 SOUTH GRAND, SUITE       0        N/A     [*****************]     0
                                      1706, LOS ANGELES, CA 90017

Pomona                                                        1800 Mt Vernon Ave.,     2                [*****************]     2
                                                              Pomona, CA 91768

RIVERSIDE, CA                         RIVERSIDE POP - 1550 MALBOROUGH AVE.,            2        N/A     [*****************]     0
                                      RIVERSIDE, CA 92507

Lindenberger                                                  29801 Scott Road,        0                [*****************]     0
                                                              Sun City, CA 92584

Escondido                                                     1747 South Escondido     0                [*****************]     0
                                                              Blvd., Escondido, CA
                                                              92025
</Table>

                               Exhibit A - Page 2
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

<Table>
<S>                                  <C>                        <C>                  <C>      <C>       <C>                  <C>

SAN DIEGO, CA                         KEARNEY MESA COMPLEX, 8923 COMPLEX DRIVE,        2        N/A     [*****************]     0
                                      SAN DIEGO, CA 92123

----------------------------------------------------------------------------------------------------------------------------------
                     ROUTE RACK COUNT                                                                                           2

SAN DIEGO, CA                         KEARNEY MESA COMPLEX, 8923 COMPLEX DRIVE,        0        N/A     [*****************]     0
                                      SAN DIEGO, CA 92123

Oceanside                                                     1806 Missions Ave.,      0      02/26/06  [*****************]     0
                                                              Oceanside, CA 92507

Laguna Nigel                                                  2734 Camino              0      02/26/06  [*****************]     0
                                                              Capistrano, Ste.
                                                              157, Laguna Nigel,
                                                              CA 92677

RIVERSIDE, CA                         RIVERSIDE POP - 1550 MALBOROUGH AVE.,            2        N/A     [*****************]     2
                                      RIVERSIDE, CA 92507

Banning                                                       2010 E. Westward         5      02/26/06  [*****************]     6
                                                              Ave, Banning, CA
                                                              92220

Indio                                                         46501 Wheel Road,        2      02/26/06  [*****************]     2
                                                              Indio, CA 92201

Mortmar (a\k\a Mecca)                                         99815 Hwy 111,           2      02/26/06  [*****************]     2
                                                              Mecca, CA 92254

Flowing Well (a\k\a Niland)                                   7835 E. Noffsinger       2      02/26/06  [*****************]     2
                                                              Rd., Niland, CA 92257

Ogillay (a\k\a Winterhaven &                                  672 Sidewinder Rd.       5      02/26/06  [*****************]     5
Sidewinder)                                                   Winterhaven, CA 92283

Ligurta                                                       10045 S. Avenue 20       2      02/26/06  [*****************]     2
                                                              3/4, Ligurta, AZ
                                                              85356

Growler                                                       283 N. Avenue 49E,       2      02/26/06  [*****************]     2
                                                              Roll, AZ 85347

Hyder (a\k\a Agua Caliente)                                   43603 South Agua         2      02/26/06  [*****************]     2
                                                              Caliente, Agua
                                                              Caliente, AZ 85333

Palo Verde                                                    8416 S. 299th Ave,       2      02/26/06  [*****************]     2
                                                              Palo Verde, AZ 85343

PHOENIX, AZ                           PHOENIX POP - 17 E. VIRGINIA, PHOENIX, AZ        12       N/A     [*****************]     0
                                      85004

----------------------------------------------------------------------------------------------------------------------------------
                     ROUTE RACK COUNT                                                                                          27

PTLD - SCRM

PORTLAND, OR                          PORTLAND POP - 707 SW WASHINGTON ST., 4TH        18       N/A     [*******************   17
                                      FL., SUITE 410, PORTLAND, OR 97205

Salem                                                         1244 Howell Praire       2      06/12/06  [*****************]     2
                                                              Road NE, Salem, OR
                                                              97301

Shedd                                                         Boston Mill Road &       2      06/12/06  [*****************]     2
                                                              Seven Mile Lane,
                                                              Shedd, OR 97377

Jasper (a\k\a Springfield)                                    37385 Jasper Lowell      2      06/12/06  [*****************]     2
                                                              Road, Jasper, OR
                                                              97438

Oakridge                                                      N. Fish Hatchery         5      06/12/06  [*****************]     6
                                                              Road & Hwy 58,
                                                              Oakridge, OR 97463

Chemult                                                       Hwy 97 South, Btwn       2      06/12/06  [*****************]     2
                                                              Chalet and Featerbed
                                                              1, Chemult, OR 97731

Chiloquin                                                     Hwy 97 South & 1st       5      06/12/06  [*****************]     6
                                                              road North of Hwy
                                                              62, Chiloquin, OR
                                                              97624

S. Kalamath                                                   SW Corner of Keller      2      06/12/06  [*****************]     2
                                                              Road & Hwy 39,
                                                              Kalamath Falls, OR
                                                              97624

Tionesta                                                      CR 97 & Gravel Plant     2      06/12/06  [*****************]     2
                                                              Road, Alturas, CA
                                                              96015

Fall River Valley                                             Red Mountain Road @      2      06/12/06  [*****************]     2
                                                              Brown Road, Fall
                                                              River Mills, CA 96028

Oak Run                                                       North on Oak Run to      5      06/12/06  [*****************]     6
                                                              Fern Road, Oak Run,
                                                              CA 96069

Red Bluff                                                     Baker Road North of      2      06/12/06  [*****************]     2
                                                              Pymire on Eastside
                                                              of Road, Red Bluff,
                                                              CA 96080

S. Chico                                                      Tokay Ranch Road,        2      06/12/06  [*****************]     2
                                                              Chico, CA 95973
</Table>
                               Exhibit A - Page 3
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

<Table>
<S>                                  <C>                      <C>                   <C>      <C>       <C>                  <C>
Biggs                                                         3951 Farris Road @       2      06/12/06  [*****************]     2
                                                              B. Gridley Road,
                                                              Biggs, CA 95917

Robbins                                                       Sacramento Valley        2      06/12/06  [*****************]     2
                                                              Road @ SR 113,
                                                              Robbins, CA 95645

SACRAMENTO, CA                        SACRAMENTO POP II - 770 L. ST., SUITE 120,       15       N/A     {*******************   14
                                      SACRAMENTO, CA 95814

----------------------------------------------------------------------------------------------------------------------------------
                     ROUTE RACK COUNT                                                                                          71

SCRM - LSAN

SACRAMENTO, CA                        SACRAMENTO POP II - 770 L. ST., SUITE 120,       0        N/A     [*****************]     0
                                      SACRAMENTO, CA 95814

Herald                                                        13368 Alta Mesa          2      11/28/06  [*****************]     2
                                                              Road, Herald, CA
                                                              95638

Stockton                                                      3105-3139 E              2      11/28/06  [*****************]     2
                                                              Carpenter Road,
                                                              Stockton, CA 95205

MODESTO, CA                           MODESTO POP - 13TH & M ST., MODESTO, CA 95354    2                [*****************]     2

Winton (a\k\a Merced)                                         3291 W. Bellevue         5      11/28/06  [*****************]     6
                                                              Road, Merced, CA
                                                              95348

Madera (a\k\a Chowchilla)                                     Adjacent to 24311        2      11/28/06  [*****************]     2
                                                              Santa Fe Drive,
                                                              Chowchilla, CA 93610

FRESNO, CA                            FRESNO POP - 364 W. FALLBROOK AVENUE,            2        N/A     [*****************]     2
                                      FRESNO, CA 93711

Dinuba                                                        40063 Road 56 -          2      11/28/06  [*****************]     2
                                                              Route 23 East,
                                                              Dinuba, CA 93618

Tulare                                                        739 N. Oaks Street,      5      11/28/06  [*****************]     6
                                                              Tulare, CA 93274

Delano                                                        11094 Browning Road,     2      11/28/06  [*****************]     2
                                                              Delano, CA 93215

BAKERSFIELD, CA                       BAKERSFIELD POP - 2020 P STREET BAKERSFIELD,     2        N/A                             2
                                      CA 93301

Arvin                                                         A35947 Comanche          2      11/28/06  [*****************]     2
                                                              Point Road, Arvin,
                                                              CA 93203

Tehachapi                                                     11253 Tehachapi          5      11/28/06  [*****************]     6
                                                              Willow Springs Road,
                                                              Mojave, CA 93501

Palmdale                                                      17th Street East @       2      11/28/06  [*****************]     2
                                                              East Q Ave.,
                                                              Palmdale, CA 93350

Adelanto                                                      19402 Koala Rd.,         2      11/28/06  [*****************]     2
                                                              Adelanto, CA 92301

Ontario                                                       350 S. Milliken, Ste     2      11/28/06  [*****************]     2
                                                              O & P, Ontario, CA
                                                              91761

LOS ANGELES, CA                       LOS ANGELES POP - ONE WILSHIRE BLDG., 624        0        N/A     [*****************]     0
                                      SOUTH GRAND, SUITE 1706, LOS ANGELES, CA
                                      90017
----------------------------------------------------------------------------------------------------------------------------------
                     ROUTE RACK COUNT                                                                                          42

PHNX - HSTN

PHOENIX, AZ                           PHOENIX POP - 17 E. VIRGINIA, PHOENIX, AZ        0        N/A     [*****************]     0
                                      85004

Queen Creek (a\k\a Florence)                                  6268 E. Heritage         2      11/11/05  [*****************]     2
                                                              Road, Florence, AZ
                                                              35242

Red Rock                                                      22640 E. Camino          2      11/11/05  [*****************]     2
                                                              Adelante, Red Rock,
                                                              AZ 85245

TUCSON, AZ                            TUCSON POP - 135 & 139 NORTH 6TH AVE.,           2        N/A     [*****************]     1
                                      TUCSON, AZ 85701

Mescal (a\k\a Benson)                                         3153 Train Track         2      11/11/05  [*****************]     2
                                                              Road, Benson, AZ
                                                              85602

Dragoon                                                       4846 E. Dragoon          5      11/11/05  [*****************]     5
                                                              Road, Dragoon, AZ
                                                              85609

Luzena (a\k\a Bowie)                                          2403 W. Luzena Road,     2      11/11/05  [*****************]     2
                                                              Bowie, AZ 85606

Road Forks                                                    390 Union Trail,         2      11/11/05  [*****************]     2
                                                              Road Forks, NM 88045

Separ (a\k\a Silver City)                                     4261 Separ Road,         2      11/11/05  [*****************]     2
                                                              Silver City, NM 88061

Carne (a\k\a Deming)                                          11485 Mundo Road NE,     2      11/11/05  [*****************]     2
                                                              Deming, NM 88030
</Table>

                               Exhibit A - Page 4
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

<Table>
<S>                                  <C>                      <C>                   <C>      <C>       <C>                  <C>
Afton (a\k\a Las Cruces)                                      9500 County Road,        5      11/11/05  [*****************]     5
                                                              B004, Las Cruces, NM
                                                              88005

EL PASO, TX                           EL PASO POP - 501 W. OVERLAND AVENUE, EL         2        N/A     [*****************]     2
                                      PASO, TX 79901

Tornillo (a\k\a Fabens)                                       19750 Alameda            2      11/11/05  [*****************]     2
                                                              Avenue, Fabens, TX
                                                              79853

Ft. Hancock                                                   1291 Lasca Road, Ft.     2      11/11/05  [*****************]     2
                                                              Hancock, TX 79839

Van Horn                                                      428 Fuest Ranch;         5      11/11/05  [*****************]     6
                                                              144163 I-10, Van
                                                              Horn, TX 79855

Valentine                                                     14338 US Hwy 90,         2      11/11/05  [*****************]     1
                                                              Valentine, TX 79854

Marfa                                                         1500 W. San Antonio,     2      11/11/05  [*****************]     1
                                                              Marfa, RX 79843

Alpine                                                        22313 US Hwy 90,         5      11/11/05  [*****************]     5
                                                              Alpine, TX 79830

Marathon                                                      26372 US Hwy 90,         2      11/11/05  [*****************]     2
                                                              Marathon, TX 79842

Sanderson                                                     538 E. Hwy 90,           2      11/11/05  [*****************]     2
                                                              Sanderson, RX 79848

Langtry                                                       4297 E. Hwy 90,          2      11/11/05  [*****************]     2
                                                              Langtry, TX 78871

Comstock                                                      33838 US Hwy 90 W,       2      11/11/05  [*****************]     2
                                                              Comstock, TX 78837

Del Rio                                                       4256 US Hwy 90 E,        5      11/11/05  [*****************]     5
                                                              Del Rio, TX 78841

Bracketville                                                  15402 US Hwy 90 E,       2      11/11/05  [*****************]     2
                                                              Bracketville, TTX
                                                              78832

Sabinal                                                       61 C.R. 305 Knippa,      2      11/11/05  [*****************]     1
                                                              Sabinal, TX 78870

Hondo                                                         3280 C.R. 4514,          2      11/11/05  [*****************]     2
                                                              Hondo, TX 78861

SAN ANTONIO, TX                       SAN ANTONIO POP - 1203 N. FRIO STREET, SAN       2        N/A     [*****************]     1
                                      ANTONIO, TX, 78207

Kingsbury                                                     3004 FM 1104,            5      11/11/05  [*****************]     6
                                                              Kingsbury, TX 78838

AUSTIN, TX                            AUSTIN POP - 500 CHICON STREET, AUSTIN, TX       2        N/A     [*****************]     1
                                      78702

Giddings (a\k\a McDade)                                       2230 Hwy 290 E,          2      11/11/05  [*****************]     2
                                                              McDade, TX 78650

Brenham                                                       55 Wildflower Road,      2      11/11/05  [*****************]     2
                                                              Brenham, TX 77833

Waller                                                        20805 FM 362,            2      11/11/05  [*****************]     1
                                                              Waller, TX 77484

HOUSTON, TX                           HOUSTON POP - 1124 HARDY STREET, HOUSTON, TX     0        N/A     [*****************]     0
                                      77020

----------------------------------------------------------------------------------------------------------------------------------
                     ROUTE RACK COUNT                                                                                          75

BSTN - ALBY

BOSTON, MA                            BOSTON POP - PRUDENTIAL INSURANCE BLDG., 800     0        N/A     [*****************]     0
                                      BOYLSTON ST., 15TH FL., SUITE 1530, BOSTON,
                                      MA 02199

WORCESTER, MA                         WORCHESTER POP - 474 MAIN STREET, WORCESTER,     2        N/A     [*****************]     2
                                      MA 01608

SPRINGFIELD, MA                       SPRINGFIELD POP - ONE FEDERAL STREET, 6TH        2        N/A     [*****************]     2
                                      FLOOR, SPRINGFIELD, MA 01105

Lee                                                           250 West Road, North     2      09/27/05  [*****************]     2
                                                              of Service Plaza,
                                                              Lee, MA 01238

ALBANY, NY                            ALBANY POP - 194 WASHINGTON AVE., 5TH FL.,       0        N/A     [*****************]     0
                                      SUITE 502, ALBANY, NY 12210

----------------------------------------------------------------------------------------------------------------------------------
                     ROUTE RACK COUNT                                                                                          6

SCRM - SLKC

SACRAMENTO, CA                        SACRAMENTO POP II - 770 L. ST., SUITE 120,       0        N/A     [*****************]     0
                                      SACRAMENTO, CA 95814

Auburn Alt.                                                   1725 Auburn Ravine       2      12/18/05  [*****************]     2
                                                              Road, Auburn, CA
                                                              95603

Blue Canyon                                                   Blue Canyon Exit off     2      12/18/05  [*****************]     2
                                                              I-80, Blue Canyon,
                                                              CA 95714

Truckee                                                       10136 Hirshdale          2      12/18/05  [*****************]     2
                                                              Road, Truckee, CA
                                                              96161

</Table>

                               Exhibit A - Page 5
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

<Table>
<S>                                  <C>                      <C>                   <C>      <C>       <C>                  <C>
RENO, NV                              RENO POP - 220 GARDNER ST., RENO, NV 89503       5        N/A     [*****************]     5

Hot Springs Flat (a\k\a Fallon)                               Exit 65 off I-80,        2      12/18/05  [*****************]     2
                                                              Nightingale Rd.,
                                                              Fallon, NV 89406

Lovelock                                                      55 Cornell Avenue,       2      12/18/05  [*****************]     2
                                                              Lovelock, NV 89419

Mill City (a\k\a Imlay)                                       Exit 149 on I-80,        2      12/18/05  [*****************]     2
                                                              Lot 14, Block B Mill
                                                              City Acres, Imlay,
                                                              NV 89418

Golconda Butte (a\k\a Winnemucca)                             Exit 187 off I-80,       5      12/18/05  [*****************]     5
                                                              North of
                                                              interchange,
                                                              Winnemucca, NV 89445

Snow Gulch                                                    Exit 222 off I-80,       2      12/18/05  [*****************]     2
                                                              1.9 miles North of
                                                              Access, Snow Gulch,
                                                              NV 89444

Dunphy (a\k\a Eureka)                                         Exit 254 off I-80        2      12/18/05  [*****************]     2
                                                              North, East 3.5
                                                              miles, Eureka, NV
                                                              89821

Hunter (a\k\a McGill)                                         Exit 292 off I-80,       2      12/18/05  [*****************]     2
                                                              North of
                                                              intersection, then
                                                              East, McGill, NV
                                                              89318

Deeth (a\ka Elko)                                             Exit 333 off I-80, 5     5      12/18/05  [*****************]     5
                                                              miles East on North
                                                              Frontage Rd, Elko,
                                                              NV 89835

Oasis                                                         Exit 380 off I-80,       2      12/18/05  [*****************]     2
                                                              Oasis, NV 89830

Wendover                                                      3131 East Frontage       2      12/18/05  [*****************]     2
                                                              Road, Wendover, UT
                                                              84083

Barrow                                                        9.5 miles West of        2      12/18/05  [*****************]     2
                                                              I-80, Barro, UT 84083

Timpie (a\k\a Tooele)                                         15516 West Rowley        2      12/18/05  [*****************]     2
                                                              Road, Tooele, UT
                                                              84022

SALT LAKE CITY, UT                    SALT LAKE CITY POP - 5035 HAROLD GATTY           18       N/A     [*******************   16
                                      DRIVE, SALT LAKE CITY, UT 84116

----------------------------------------------------------------------------------------------------------------------------------
                     ROUTE RACK COUNT                                                                                          57

HSTN - ATLN

HOUSTON, TX                           1124 HARDY STREET, HOUSTON, TX 77020             0        N/A     [*****************]     0

Kingwood (a\k\a Huffman or Harris)                            33902                    2      05/26/05  [*****************]     2
                                                              Huffman-Cleveland R,
                                                              Huffman, TX 77336

Sour Lake (a\k\a Hardin)                                      29979 Highway 105,       6      05/26/05  [*****************]     6
                                                              Sour Lake, TX 77659

Buna (a\k\a Jasper)                                           Hwy 62 South, Buna,      2      05/26/05  [*****************]     2
                                                              TX 77612

Ragley (a\k\a Beauregard)                                     17329 Hwy 171 North,     2      05/26/05  [*****************]     2
                                                              Ragley, LA 70657

Basile (a\k\a Evangeline)                                     1919 Hunter Rd.,         6      05/26/05  [*****************]     5
                                                              Basile, LA 70515

Port Barre (a\k\a St. Landre or                               2343 Highway 359,        6      05/26/05  [*****************]     6
WASHINTGON)                                                   Washington, LA 70589

Zachary Jct. (a\k\a Feliciana or                              1479 A Highway 964,      5      05/26/05  [*****************]     3
Jackson)                                                      Jackson, LA 70748

SPUR TO NEW ORLEANS, LA

BATON ROUGE, LA                       BATON ROUGE POP - 445 N. BLVD., SUITE 600,       1        N/A     [*****************]     1
                                      BATON ROUGE, LA 70802

Reserve (a\k\a Gramercy or Garyville)                         5599 Airline             2      05/26/05  [*****************]     2
                                                              Highway, Garyville,
                                                              LA 70084

NEW ORLEANS, LA                       NEW ORLEANS POP - 639 LOYOLA AVE., SUITE         4        N/A     [*****************]     1
                                      2020, NEW ORLEANS, LA 70113

Greensburg (a\k\a St. Helena)                                 Hwy 43 North,            2      05/26/05  [*****************]     2
                                                              Greensburg, LA 70441

Tylertown (a\k\a Walthall)                                    967 Hwy 583,             2      05/26/05  [*****************]     2
                                                              Tylertown, MS 39667

Seminary (a\k\a Covington Co.)                                11 Kelly Creek Road,     6                [*****************]     6
                                                              Seminary, MS 39479

SPUR TO JACKSON, MS

Mendenhall                                                    3498 Simpson, Hwy        2      05/26/05  [*****************]     2
                                                              49, Mendenhall, MS
                                                              39114

JACKSON, MS                           JACKSON POP - CAPITOL BLDG, 111 E. CAPITOL       0        N/A     [*****************]     0
                                      ST. SUITE 248, JACKSON, MS 39201

</Table>

                               Exhibit A - Page 6
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

<Table>
<S>                                  <C>                      <C>                   <C>      <C>       <C>                  <C>
Laurel (a\k\a Jasper or Sandersville)                         1666 Bonner Road,        2      05/26/05  [*****************]     2
                                                              Sandersville, MS
                                                              39477

Quitman (a\k\a Jasper Co.)                                    240 Vyvx Lane,           2      05/26/05  [*****************]     2
                                                              Quitman, MS 39955

Linden (a\k\a Merengo or Sweetwater)                          Hwy 69 South,            2      05/26/05  [*****************]     2
                                                              Sweetwater, AL 36782

Selma (a\k\a Dallas Co. or Browns)                            1713 County Road         6      05/26/05  [*****************]     6
                                                              179, Browns, AL 36724

Clanton (a\k\a Chilton or                                     4521 Chilton Road        2      05/26/05  [*****************]     2
Billingsley)                                                  #352, Billingsley,
                                                              AL 36006

SPUR TO BIRMINGHAM, AL

Calera                                                        157 County Road 95,      2      05/26/05  [*****************]     2
                                                              Calera, AL 35041

BIRMINGHAM, AL                        BIRMINGHAM POP - 2001 PARK PLACE TOWERS          0        N/A     [*****************]     0
                                      NORTH, SUITE 102,BIRMINGHAM, AL 35203
Alexander City (a\k\a Coosa or                                250 Highway 9,           6      05/26/05  [*****************]     6
Kellyton)                                                     Kellyton, AL 35089

Wadley (a\k\a Randolph Co.)                                   1140 County Rd 41,       2      05/26/05  [*****************]     2
                                                              Wadley, AL 36276

Newnan (a\k\a Coweta Co.)                                     65 Mayo Royal Road,      2      05/26/05  [*****************]     2
                                                              Newnan, GA 30263

ATLANTA, GA                           ATLANTA POP - 874 DEKALB AVENUE, ATLANTA, GA     0        N/A     [*****************]     0
                                      30307

----------------------------------------------------------------------------------------------------------------------------------
                     ROUTE RACK COUNT                                                                                          68

ATLN - JCVL

ALANTA, GA                           ATLANTA POP - 874 DEKALB AVENUE, ATLANTA, GA     0        N/A     [*****************]     0
                                     30307

Covington                                                     10816 Old Atlanta        2      06/15/05  [*****************]     2
                                                              Highway, Covington,
                                                              GA 30014

Monticello                                                    8036 Highway 11          2      06/15/05  [*****************]     2
                                                              South, Monticello,
                                                              GA 31064

MACON, GA                             MACON POP - CHARTER MEDICAL BLDG., 577           2        N/A     [*****************]     1
                                      MULBERRY ST., SUITE 175, MACON, GA 31201

Montrose                                                      4060 Highway 80 W,       2      06/15/05  [*****************]     2
                                                              Montrose, GA 31065

Alamo                                                         Route 1 Box 304,         6      06/15/05  [*****************]     6
                                                              Alamo, GA 30411

Baxley                                                        544 Buckhorn Road        2      06/15/05  [*****************]     2
                                                              NE, Baxley, GA 31513

Patterson                                                     5860 North Campus        2      06/15/05  [*****************]     2
                                                              Road, Patterson, GA
                                                              31557

Folkston                                                      Route 1 Box 845,         2      06/15/05  [*****************]     2
                                                              Folkston, GA 31537

JACKSONVILLE, FL                      JACKSONVILLE POP - 608 W. ADAMS ST.,             4        N/A     [*****************]     2
                                      JACKSONVILLE, FL 32204

----------------------------------------------------------------------------------------------------------------------------------
                     ROUTE RACK COUNT                                                                                          21

MPLS - KSCY

MINNEAPOLIS, MN                       511 11TH AVE. SOUTH, SUITE 201, MINNEAPOLIS,     8        N/A     [*****************]     6
                                      MN

Northfield                                                    6730 320th Street        2      12/13/04  [*****************]     2
                                                              West, Northfield, MN
                                                              55057

Owantonna (a\k\a Hope)                                        6391 SW 68th Street,     2      12/13/04  [*****************]     2
                                                              Owantonna, MN 55060

Hanlon Town (a\k\a Tenold)                                    807 435th Street,        6      12/13/04  [*****************]     6
                                                              Hanlon Town, IA 50444

Latimer                                                       1825 Finch Avenue,       2      12/13/04  [*****************]     2
                                                              latimer, IA 50452

Roland                                                        12951 610th Avenue,      2      12/13/04  [*****************]     2
                                                              Roland, IA 50236

DES MOINES, IA                        DES MOINES POP - 4500B CARLISLE ROAD, DES        3        N/A     [*****************]     1
                                      MOINES, IA 50317

Osceola                                                       2241-B US Highway        6      12/13/04  [*****************]     6
                                                              69, Osceola, IA 50213

Ridgeway                                                      20469 W. 230th           2      12/13/04  [*****************]     2
                                                              Place, Ridgeway, MO
                                                              64481

Maysville (a\k\a Weathersby)                                  99 Southeast Dallas      2      12/13/04  [*****************]     2
                                                              Road, Weathersby, MO
                                                              64497

Plattsburgh (a\k\a Lilly)                                     2821 Southwest           2      12/13/04  [*****************]     2
                                                              Street, Plattsburg,
                                                              MO 64497

</Table>

                               Exhibit A - Page 7
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL
<Table>
<S>                                  <C>                      <C>                   <C>      <C>       <C>                  <C>
KANSAS CITY, MO                       KANSAS CITY POP - THE BRYANT BLDG., 1102         0        N/A     [*****************]     0
                                      GRAND AVE. #300, KANSAS CITY, MO 64106

----------------------------------------------------------------------------------------------------------------------------------
                     ROUTE RACK COUNT                                                                                          33

JCVL - MIAM

JACKSONVILLE, FL                      JACKSONVILLE POP - 608 W. ADAMS ST.,             0        N/A     [*****************]     0
                                      JACKSONVILLE, FL 32204

St. Augustine Beach                                           302 State Road 206       2      07/05/05  [*****************]     2
                                                              West, St. Augustine,
                                                              FL 32086

DAYTONA BEACH, FL                     DAYTONA BEACH POP - 111 N. SEAGRAVE, DAYTONA     2        N/A     [*****************]     1
                                      BEACH, FL 32114

Titusville                                                    2002 Parish Road,        2      07/05/05  [*****************]     2
                                                              Titusville, FL 32796

MELBOURNE, FL                         MELBOURNE POP - 1110 LINE STREET, MELBOURNE,     2        N/A     [*****************]     1
                                      FL 32901

Vero Beach                                                    2108 Old Dixie           6      07/05/05  [*****************]     6
                                                              Highway SE, Vero
                                                              Beach, FL 32962

Stuart                                                        4537 SE Commerce         2      07/05/05  [*****************]     2
                                                              Avenue, Stuart, FL,
                                                              34997

WEST PALM BEACH, FL                   WEST PALM BEACH POP - 410 HAMPTON RD., WEST      2        N/A     [*****************]     1
                                      PALM BEACH, FL 33405

FT. LAUDERDALE, FL                    FT. LAUDERDALE POP - 220 NW 2ND ST., FT.         2        N/A     [*****************]     1
                                      LAUDERDALE, FL 33311

MIAMI, FL                             MIAMI POP II - 200 SE 1ST STREET, MIAMI, FL      4        N/A     [*****************]     0
                                      33131

----------------------------------------------------------------------------------------------------------------------------------
                     ROUTE RACK COUNT                                                                                          16

TLHS - MIAM

TALLAHASSEE, FL                       TALLAHASSEE POP - 1416 S. ADAMS,                 0        N/A     [*****************]     0
                                      TALLAHASSEE, FL 32301

Perry (a\k\a Taylor Co. or Iddo)                              10000 N US 19, Iddo,     2      05/24/05  [*****************]     2
                                                              FL 32347

Cross City (a\k\a Taylor Co. or                               23076 S US 19, Cross     2      05/24/05  [*****************]     1
Tennille)                                                     City, FL 32647

Chiefland (a\k\a Levy Co.)                                    606 S Main St.,          2      05/24/05  [*****************]     1
                                                              Chiefland, FL 32626

Crystal River (a\k\a Citrus Co. or                            6584 Sun Coast           2      05/24/05  [*****************]     2
Red Level)                                                    Blvd., Crystal
                                                              River, FL 34428

Brooksville (a\k\a Hernando Co. or                            20032 Powell Road,       6      05/24/05  [*****************]     6
Garden Grove)                                                 Brooksville, FL 34609

TAMPA, FL                             TAMPA POP - 1700 N. 25TH, TAMPA, FL 33605        2        N/A     [*****************]     2

Wimauma (a\k\a Lithia or Ft.                                  12225 State Road         2      05/24/05  [*****************]     1
Lonesome)                                                     674, Lithia, FL 33547

Zolfo Springs (a\k\a Hardee Co. or                            205 S CR 663, Zolfo      2      05/24/05  [*****************]     2
Ona)                                                          Springs, FL 33865

Arcadia (a\k\a Desoto Co.)                                    12721 SE CR 763,         2      05/24/05  [*****************]     1
                                                              Arcadia, FL 34266

FT. MYERS, FL                         FT.  MYERS POP - 1547 SEABOARD, FT. MYERS,       3        N/A     [*****************]     2
                                      FL 33916

Labelle (a\k\a Hendry Co. or Goodno)                          4331 SR 80 East,         2      05/24/05  [*****************]     2
                                                              LaBelle, FL 33935

Belle Glade (a\k\a Palm Beach Co.)                            5115 US 27, Belle        2      05/24/05  [*****************]     1
                                                              Glade, FL 33430

Weston (a\k\a Broward Co.)                                    2002 SW 26th Street,     4      05/24/05  [*****************]     4
                                                              Weston, FL 33326

MIAMI, FL                             MIAMI POP II - 200 SE 1ST STREET., MIAMI, FL     0        N/A     [*****************]     0
                                      33131

----------------------------------------------------------------------------------------------------------------------------------
                     ROUTE RACK COUNT                                                                                          27

NWOR - TLHS

NEW ORLEANS, LA                       NEW ORLEANS POP - POYDROUS PLAZA, 639 LOYOLA     0        N/A     [*****************]     0
                                      AVE, SUITE 2020, NEW ORLEANS, LA 70113

Slidell                                                       46532 Highway 90,        2      03/28/05  [*****************]     1
                                                              Slidell, LA 70461

Pass Christian                                                13343 Cable Bridge       6      03/28/05  [*****************]     6
                                                              Road, Pass
                                                              Christian, MS 39571

Van Cleave                                                    11151 Oneal Road,        2      03/28/05  [*****************]     1
                                                              Van Cleave, MS 39565

Miller Creek                                                  3735 Newman Road,        2      03/28/05  [*****************]     1
                                                              Mobile, AL 36695

</Table>

                               Exhibit A - Page 8
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

<Table>
<S>                                  <C>                      <C>                   <C>      <C>       <C>                  <C>
MOBILE, AL                            MOBILE POP - 50 N LAWRENCE STREET, MOBILE,       2        N/A     [*****************]     1
                                      AL 36602

Robertsdale                                                   22154 US Highway 90,     2      03/28/05  [*****************]     1
                                                              Robertsdale, AL 36695

PENSACOLA, FL                         PENSACOLA POP - 221 N. BAYLEN STREET,            2        N/A     [*****************]     1
                                      PENSACOLA, FL 32501

Milton                                                        10955 Highway 90,        6      03/28/05  [*****************]     6
                                                              Milton, FL 32583

DeFuniak Springs                                              35 Wells Street,         2      03/28/05  [*****************]     1
                                                              Defuniak Springs, FL
                                                              32433

Free Port (a\k\a Ponce De Leon)                               9926 State Highway       2      03/28/05  [*****************]     1
                                                              90, Ponce De Leon,
                                                              FL 32455

Youngstown (a\k\a Juniper Creek)                              12440 E. Highway 20,     2      03/28/05  [*****************]     1
                                                              Juniper Creek, FL
                                                              32466

Hosford (a\k\a Harold)                                        West of Hwy 65 on        2      03/28/05  [*****************]     1
                                                              Hwy 20, Harold, FL
                                                              32334

TALLAHASSEE, FL                       TALLAHASSEE POP - 1416 S. ADAMS,                 4        N/A     [*****************]     2
                                      TALLAHASSEE, FL 32301

----------------------------------------------------------------------------------------------------------------------------------
                     ROUTE RACK COUNT                                                                                          24

SCRM - SNFC

SACRAMENTO, CA                        SACRAMENTO POP II - 1005 'B' STREET,             0        N/A     [*****************]     0
                                      SACRAMENTO, CA 95814

Bay Point                                                     487 Canal Road, Bay      2      03/23/06  [*****************]     2
                                                              Point, CA 94565

Creed                                                         6732 Creed Road,         2      03/23/06  [*****************]     2
                                                              Suisin City, 94585

OAKLAND, CA                           OAKLAND POP - 1330 BROADWAY, OAKLAND, CA         0        N/A     [*****************]     0
                                      94612

SAN FRANCISCO, CA                     SAN FRANCISCO POP - 200 PAUL ST., 4TH FLOOR,     0        N/A     [*****************]     0
                                      SAN FRANCISCO, CA 94124

----------------------------------------------------------------------------------------------------------------------------------
                     ROUTE RACK COUNT                                                                                           4

SNFC - SNTC

SAN FRANCISCO, CA                     200 PAUL ST., 4TH FL., SAN FRANCISCO, CA         0        N/A     [*****************]     0
                                      94124

SANTA CLARA, CA                       SANTA CLARA POP - 3045 RAYMOND STREET, SANTA     0        N/A     [*****************]     0
                                      CLARA, CA 95054

----------------------------------------------------------------------------------------------------------------------------------
                     ROUTE RACK COUNT                                                                                           0

SNTC - MDST

SANTA CLARA, CA                       SANTA CLARA POP - 3045 RAYMOND STREET, SANTA     0        N/A     [*****************]     0
                                      CLARA, CA 94536

Freemont                                                      37975 Shinn Road,        2      07/24/06  [*****************]     2
                                                              Freemont, CA 94536

Tracey                                                        11660 W. Lime Road,      2      07/24/06  [*****************]     2
                                                              Tracey, CA  95354

MODESTO, CA                           MODESTO POP - 1224 13TH STREET, MODESTO, CA      0        N/A     [*****************]     0
                                      95354

----------------------------------------------------------------------------------------------------------------------------------
                     ROUTE RACK COUNT                                                                                           4

---------------------------------------------------------------------------------------------------------------------------------
GRAND TOTAL RACK COUNT                                                                                                        594

</Table>

                               Exhibit A - Page 9
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

                                    EXHIBIT B

                            OPERATIONS SPECIFICATIONS

1. MAINTENANCE

A. NCC Functions. Provider shall operate a manned Network Control Center ("NCC")
twenty-four (24) hours a day, seven (7) days a week that monitors the Customer
Fiber by means of remote surveillance equipment and dispatches maintenance and
repair personnel to handle and repair problems detected by the NCC or reported
by Customer or other parties. Provider shall provide Customer a toll-free
telephone number to report problems to the NCC.

B. Fiber Maintenance. Provider shall perform appropriate routine maintenance on
the Customer Fiber in accordance with Provider's then-current preventative
maintenance procedures. Provider's preventative maintenance procedures shall not
substantially deviate from industry practice.

C. Collocation Site Maintenance. Provider shall perform appropriate routine
maintenance on regenerator, optical amplifier, and junction buildings, including
the DC power plant, HVAC equipment, and basic building safety equipment
including alarms and emergency generators in accordance with Provider's then
current preventative maintenance procedures. Provider's maintenance procedures
shall not substantially deviate from industry practice.

D. Route Patrol. Provider shall patrol the route on a reasonable, routine basis
and shall perform all required cable locates. Provider shall belong to a state
or regional one-call (call-before you dig) center when available.

E. Spare Cable. Provider shall maintain an inventory of spare cable at strategic
locations to facilitate timely restoration.

2. PLANNED NETWORK MAINTENANCE PROCEDURE (PNMP)

A. Timing. Provider shall avoid performing maintenance between 0600-2200 Central
time, Monday through Friday, inclusive, that will have a disruptive impact on
the continuity or performance level of the Customer Fibers. However, the
preceding sentence does not apply to restoration of continuity to a severed or
partially severed fiber optic cable, restoration of dysfunctional power and
ancillary support equipment, or correction of any potential jeopardy conditions.

B. Notice. Provider shall provide Customer with telephone, facsimile, or written
notice of all non-emergency planned network maintenance (a) no later than three
business days prior to performing maintenance that, in its reasonable opinion,
has a substantial likelihood of affecting Customer's traffic for up to 50
milliseconds, and (b) no later than ten business days prior to performing
maintenance that, in its reasonable opinion, has a substantial likelihood of
affecting Customer's traffic for more than 50 milliseconds. If Provider's
planned activity is canceled or

                               Exhibit B, Page 1
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

delayed, Provider shall promptly notify Customer and shall comply with the
provisions of the previous sentence to reschedule any delayed activity.

C. PNMP Updates. Provider may update it's PNMP and Technical Assistance
Procedure from time to time so long as the changes in procedures are reasonable
and no less favorable to the Customer. Provider shall promptly provide Customer
a copy of its then current PNMP and Technical Assistance Procedure documents
upon Customer's request. Customer hereby acknowledges receipt of Provider's PNMP
and Technical Assistance Procedure documents dated February 11, 2002.

3. FIBER AND CABLE

A. Emergency Repair. Provider shall correct or repair cable discontinuity or
damage. Provider shall use commercially reasonable efforts to repair cable
traffic discontinuity within the following timeframes:

    o    Dispatch of personnel to problem area - immediately upon learning of
         discontinuity

    o    Arrival of first maintenance employee on site - within four (4) hours
         of learning of discontinuity

    o    Restoration of cable continuity - continuity of at least one fiber
         shall be established within six (6) hours of learning of discontinuity;
         restoration shall continue until all in-service fibers are restored

    o    Electronic failure response time is two (2) hours.

B. Permanent Repair. Within twenty-four (24) hours after completion of an
emergency repair, Provider shall - commence its planning for permanent repair,
shall notify Customer of such plans, and shall implement such permanent repair
within an appropriate time thereafter.

C. Splicing Specifications. Provider shall comply with the cable splicing
specifications as provided in the Fiber Lease Agreement. Provider shall provide
to Customer any modifications to these specifications for Customer's approval,
which shall not be unreasonably withheld or delayed, so long as the
modifications do not substantially deviate from industry standards.

4. MISCELLANEOUS

A. Full-Time Dispatch Capability. Provider's maintenance employees shall be
available for dispatch twenty-four (24) hours a day, seven (7) days a week.
Provider shall use commercially reasonable efforts to have its first maintenance
employee at the site requiring an emergency maintenance activity within four (4)
hours from the time of alarm identification by Provider's NCC or notification by
Customer, whichever occurs first. Emergency maintenance is defined as any
service-affecting situations requiring an immediate response.

B. Standard of Care; Cooperation. In performing its services hereunder, Provider
shall take workmanlike care to prevent impairment to the signal continuity and
performance of the System. In addition, Provider shall reasonably cooperate with
Customer in sharing information and analyzing the disturbances regarding the
cable and/or fiber facilities.

                               Exhibit B, Page 2
<PAGE>

EXECUTION COPY                                                      CONFIDENTIAL

C. Customer Equipment. Nothing contained herein shall make Provider responsible
for Customer Equipment. If, however, Provider agrees to maintain Customer
Equipment, Customer shall provide equipment spares, vendor training and
documentation for each technician along the System route when Customer uses
equipment different from that used by Provider.

D. Escalation List. Provider shall, at Customer's request, provide Customer an
operations escalation list for use in reporting and seeking redress of
exceptions noted in Provider's performance of maintenance.

                               Exhibit B, Page 3

<PAGE>

EXECUTION COPY

CONFIDENTIAL PORTION MARKED [*************] HAS BEEN OMITTED PURSUANT TO A
REQUEST FOR CONFIDENTIAL TREATMENT AND FILED SEPARATELY WITH THE SECURITIES
AND EXCHANGE COMMISSION.

            FIRST AMENDMENT TO COLLOCATION AND MAINTENANCE AGREEMENT

         THIS FIRST AMENDMENT (this "Amendment") is made by and between WILLIAMS
COMMUNICATIONS, LLC, a Delaware limited liability company ("Provider"),
METROMEDIA FIBER NATIONAL NETWORK, INC., a Delaware corporation ("Customer") and
METROMEDIA FIBER NETWORK SERVICES, INC. ("MFNS") a Delaware corporation.

                                   Background

Provider and Customer are parties to the Collocation and Maintenance Agreement
dated April 26, 2002 (the "Agreement").

On May 20, 2002, Customer and most of its direct and indirect domestic
subsidiaries, including MFNS, each filed voluntary petitions for reorganization
pursuant to Chapter 11 of title 11 of the United States Code. (the "Bankruptcy
Code") with the United States Bankruptcy Court for the Southern District of New
York (the "Bankruptcy Court") and Customer is currently operating its business
and managing its property as a debtor-in-possession.

The parties now wish to amend the Agreement in accordance with the terms set
forth in this Amendment.

NOW THEREFORE, for mutual consideration, the value of which the parties
acknowledge, the terms of the Agreement are amended as follows:

1. Capitalized terms not otherwise defined in this Amendment have the meaning
ascribed in the Agreement.

2. On the Effective Date, pursuant to Section 20.1, the Agreement as amended is
wholly assigned from Lessee to MFNS, and thereafter all references to "Customer"
refer to MFNS and MFNN is discharged from further obligation.

3. EXHIBIT A is replaced with EXHIBIT A-1, attached to this Amendment.

4. Section 2.1 is deleted and replaced with the following:

"CHARGES FOR MAINTENANCE. Customer shall pay Provider a maintenance fee of
[*****] per fiber mile, per month for the maintenance services set forth in
Article 6 of this Agreement, such amount currently totaling [*******] per month
(14,770 fiber miles x [**]). Invoices for such maintenance services shall be
issued monthly."

5. Section 3.2 is deleted and replaced with the following:

"3.2 Collocation Sites.

         (a) As of the Effective Date of the First Amendment to this Agreement,
Provider agrees to provide and Customer agrees to pay for the Collocation Sites
and corresponding

CONFIDENTIAL
PAGE 1 OF 3

<PAGE>

EXECUTION COPY

number of racks identified in EXHIBIT A-1 together with associated collocation
services ordered by Customer. The current monthly invoice for collocation racks
will be [*******].

         (b) Any additional requests by Customer for racks at the Collocation
Sites Set forth in Exhibit A-1 shall be considered a request for Additional
Services as defined below."

6. Section 9.4 is modified by the addition of the following sentence at the end:

"Such legal remedies include, but shall not be limited to, the termination of
this Agreement and the Fiber Agreement."

7. ASSUMPTION AND WAIVER OF SPECIFIC CLAIMS. Following the assumption of the
Agreement, if the Agreement is terminated due to Lessee's failure to perform or
its rejection thereof, nothing herein constitutes a waiver of Williams
Communications' right to a general unsecured claim for all outstanding
pre-petition amounts owed under the Agreement and an administrative claim for
post-petition damages caused by any breach of the Agreement, or of the right of
MFN or any party in interest to object to any such claim. Any and all
administrative expense claims will require Williams Communications to satisfy
the requirements of the Bankruptcy Code to establish the claim and is without
prejudice to any other party's right to contest such claim.

8. EFFECTIVE DATE. This Amendment is effective upon the date of the last
signature hereto ("Effective Date"). The parties agree that the new monthly
billing rate as specified in paragraph 5 of this Amendment is effective October
1, 2002. To be sure, any invoices rendered during September 2002 for October
services, will be adjusted accordingly. Notwithstanding the foregoing, the
parties acknowledge that the Amendment must be approved by the Bankruptcy Court
pursuant to an order, in form and substance acceptable to Provider and Customer,
which provides for, among other things, the following: (i) assumption of the
Agreement, as amended, pursuant to section 365 of the Bankruptcy Code, and (ii)
a finding that the parties negotiated the Amendment at arm's length and in good
faith. If such approval is not obtained on or before October 17, 2002 or such
later date as the parties may agree to, this Amendment will be null and void and
of no force or effect and Customer agrees to pay the difference between the
amended amounts invoiced for October and the actual amounts owed under the
Agreement.

9. Except as amended, all of the original terms and conditions of the Agreement
continue in full force and effect, neither party is in currently in default, and
the Agreement, as amended is hereby ratified and confirmed.

10. This Amendment may be executed in counterparts, each of which taken together
constitute one and the same instrument.

Signatures on following page

CONFIDENTIAL
PAGE 2 OF 3

<PAGE>

EXECUTION COPY

The parties have executed this Amendment on the dates set forth below above.

METROMEDIA FIBER NETWORK SERVICES, INC., a Delaware corporation

Signature:        /s/ William G. La Perch
          -------------------------------------------------

(Print) Name:      William G. La Perch
              ---------------------------------------------

(Print) Title:     Sr. Vice President
              ---------------------------------------------

(Print) Date:     10/10/02
             ----------------------------------------------

METROMEDIA FIBER NATIONAL NETWORK, INC., a Delaware corporation

Signature:        /s/ William G. La Perch
          -------------------------------------------------

(Print) Name:      William G. La Perch
              ---------------------------------------------

(Print) Title:     Sr. Vice President
              ---------------------------------------------

(Print) Date:      10/10/02
             ----------------------------------------------

WILLIAMS COMMUNICATIONS, LLC, a Delaware limited liability company

Signature:        /s/ Frank M. Semple
          -------------------------------------------------

(Print) Name:      Frank M. Semple
              ---------------------------------------------

(Print) Title:    Chief Operating Officer
              ---------------------------------------------

(Print) Date:     10/2/02
             ----------------------------------------------

CONFIDENTIAL
PAGE 3 OF 3

<PAGE>
   EXECUTION COPY

                                  EXHIBIT A-1

                               COLLOCATION SITES

<Table>
<Caption>
        SELECTED SEGMENT             POP LOCATIONS     TRANSMISSION SITE LOCATIONS     RACK RATE        # OF
                                                                                                       RACKS
---------------------------------------------------------------------------------------------------------------
<S>                              <C>                  <C>                              <C>             <C>
ATLN - WASH

Lawrenceville                                         790 Mcart Rd.,                     $[******]        1
                                                      Lawrenceville, GA 30245

Athens (a\k\a Hull)                                   920 Smith Road, Hull, GA           $[******]        1
                                                      30646

Hartwell                                              4260 Liberty Mill Rd.,             $[******]        2
                                                      Hartwell, GA 30643

Greenville                                            9744 Augusta Rd.,                  $[******]        1
                                                      Greenville, SC 29669

SPARTANBURG, SC                   SPARTANBURG POP - BTC BUILDING, 145 N. CHURCH          $[******]        1
                                  ST., SUITE 3, SPARTANBURG, SC 29306

York                                                  2154 Templeton Rd., Clover,        $[******]        2
                                                      SC 29710

CHARLOTTE, NC                     CHARLOTTE POP - 112 N. MEYERS ST., CHARLOTTE, NC       $[******]        1
                                  28202

Salisbury (a\k\a Mt. Ulla)                            295 Upright Rd., Mt. Ulla,         $[******]        1
                                                      NC 28125

Kernersville Jct.                                     LOT #51M, 1334 Old Salem           $[******]        1
                                                      Road, Kernersville, NC 27284

SPUR TO GREENSBORO & RALEIGH, NC

Reidsville                                            1301 Ashley Loop,                  $[******]        1
                                                      Reidsville, NC 27320

Chatham                                               945 Transco Rd., Chatham, VA       $[******]        2
                                                      24531

AppomattFPox                                            Hwy. 691 SW, Appomattox, VA        $[******]        1
                                                      24522

Scottsville Jct.                                      Highway 643, Scottsville, VA       $[******]        1
                                                      24590

SPUR TO RICHMOND, VA

Unionville                                            74444 Everona Rd.,                 $[******]        1
                                                      Unionville, VA 22587

Manassas                                              10699 Piperlane, Manassas,         $[******]        1
                                                      VA 20110
                 ROUTE RACK COUNT                                                                         18

HSTN - DLLS (IXC)

HOUSTON, TX                       HOUSTON POP - 1124 HARDY STREET, HOUSTON, TX            [******]        2
                                  77020

Willis (a\k\a Montgomery Co.)                                 16533 IH 45 NORTH,         $[******]        1
                                                              Willis, TX 77378

Madison                                                       Route 2, Box 213,          $[******]        1
                                                              Madisonville, TX
                                                              77864
</Table>

   CONFIDENTIAL
   FIRST AMENDMENT TO COLLOCATION AND MAINTENANCE AGREEMENT
   EXHIBIT A-1

<PAGE>

   EXECUTION COPY

<Table>

<S>                              <C>                  <C>                              <C>             <C>
Buffalo                                                       23433 IH 45 North,         $[******]        2
                                                              Buffalo, TX 75831

Streetman                                                     16108 IH 45 North,         $[******]        1
                                                              Streetman, TX 75859

Ennis                                                         3910 IH 45 North,          $[******]        1
                                                              Ennis, TX 75120
                     ROUTE RACK COUNT                                                                     8

KSCY - DNVR

KANSAS CITY, MO                       KANSAS CITY POP - THE BRYANT BLDG., 1102           $[******]        2
                                      GRAND AVE. #300, KANSAS CITY, MO 64106

Lawrence                                                      13804 246th St.,           $[******]        1
                                                              Lawrence, KS 66044

TOPEKA, KS                            TOPEKA POP - 101 SE MONROE, TOPEKA, KS 66603       $[******]        1

Allen (a\k\a Miller)                                          1836 County Rd. 330,       $[******]        1
                                                              Osage City, KS 66868

Elmdale                                                       RR 1, Elmdale,             $[******]        2
                                                              Cottonwood Falls, KS
                                                              66850

Newton                                                        937 Falcon Road,           $[******]        1
                                                              Newton, KS 67114

Inman                                                         380 Plum Ave.,             $[******]        1
                                                              Inman, KS 67546

Ellinwood                                                     1150 E BARTON CO.          $[******]        1
                                                              ROAD, Ellinwood, KS
                                                              67526

Bison                                                         Rural Rt. 1, Bison,        $[******]        2
                                                              KS 67520

Ellis                                                         Rural Rt. 1, Ellis,        $[******]        1
                                                              KS 67637

Grainfield                                                    1102 COUNTY ROAD 50,       $[******]        1
                                                              Grainfield, KS 67737

Oakley (a\k\a Monument)                                       2317 Daydream Road,        $[******]        1
                                                              Monument, KS 67747

Goodland                                                      5655 County Road           $[******]        1
                                                              #16, Goodland, KS

Burlington (a\k\a Bethune)                                    32353 County Rd. 40,       $[******]        2
                                                              Burlington, CO 80805

Flagler                                                       7250 County Rd. HH,        $[******]        1
                                                              Flagler, CO 80815

Woodrow                                                       1018 HIGHWAY 71,           $[******]        1
                                                              Woodrow, CO 80757
</Table>

   CONFIDENTIAL
   FIRST AMENDMENT TO COLLOCATION AND MAINTENANCE AGREEMENT
   EXHIBIT A-1

<PAGE>

   EXECUTION COPY

<Table>

<S>                              <C>                  <C>                              <C>             <C>
Strasburg                                                     2598 S County Rd.,         $[******]        1
                                                              157, Strasburg, CO
                                                              80136
                     ROUTE RACK COUNT                                                                     21

PTLD - SCRM

PORTLAND, OR                          PORTLAND POP - 707 SW WASHINGTON ST., 4TH          $[******]        7
                                      FL., SUITE 410, PORTLAND, OR 97205
                     ROUTE RACK COUNT                                                                     7

SCRM - SLKC

SACRAMENTO, CA                        SACRAMENTO POP II - 770 L. ST., SUITE 120,         $[******]        2
                                      SACRAMENTO, CA 95814

Auburn Alt.                                                   1725 Auburn Ravine         $[******]        1
                                                              Road, Auburn, CA
                                                              95603

Blue Canyon                                                   Blue Canyon Exit off       $[******]        1
                                                              I-80, Blue Canyon,
                                                              CA 95714

Truckee                                                       10136 Hirshdale            $[******]        1
                                                              Road, Truckee, CA
                                                              96161

RENO, NV                              RENO POP - 220 GARDNER ST., RENO, NV 89503         $[******]        2

Hot Springs Flat (a\k\a Fallon)                               Exit 65 off I-80,          $[******]        1
                                                              Nightingale Rd.,
                                                              Fallon, NV 89406

Lovelock                                                      55 Cornell Avenue,         $[******]        1
                                                              Lovelock, NV 89419

Mill City (a\k\a Imlay)                                       Exit 149 on I-80,          $[******]        1
                                                              Lot 14, Block B Mill
                                                              City Acres, Imlay,
                                                              NV 89418

Golconda Butte (a\k\a Winnemucca)                             Exit 187 off I-80,         $[******]        2
                                                              North of
                                                              interchange,
                                                              Winnemucca, NV 89445

Snow Gulch                                                    Exit 222 off I-80,         $[******]        1
                                                              1.9 miles North of
                                                              Access, Snow Gulch,
                                                              NV 89444

Dunphy (a\k\a Eureka)                                         Exit 254 off I-80          $[******]        1
                                                              North, East 3.5
                                                              miles, Eureka, NV
                                                              89821

Hunter (a\k\a McGill)                                         Exit 292 off I-80,         $[******]        1
                                                              North of
                                                              intersection, then
                                                              East, McGill, NV
                                                              89318

Deeth (a\ka Elko)                                             Exit 333 off I-80, 5       $[******]        2
                                                              miles East on North
                                                              Frontage Rd, Elko,
                                                              NV 89835
</Table>

   CONFIDENTIAL
   FIRST AMENDMENT TO COLLOCATION AND MAINTENANCE AGREEMENT
   EXHIBIT A-1

<PAGE>

   EXECUTION COPY
<Table>

<S>                              <C>                  <C>                              <C>             <C>

Oasis                                                         Exit 380 off I-80,         $[******]        1
                                                              Oasis, NV 89830

Wendover                                                      3131 East Frontage         $[******]        1
                                                              Road, Wendover, UT
                                                              84083

Barrow                                                        9.5 miles West of          $[******]        1
                                                              I-80, Barro, UT 84083

Timpie (a\k\a Tooele)                                         15516 West Rowley          $[******]        1
                                                              Road, Tooele, UT
                                                              84022

SALT LAKE CITY, UT                    SALT LAKE CITY POP - 5035 HAROLD GATTY                              11
                                      DRIVE, SALT LAKE CITY, UT 84116               [**************
                                                                                         *****]

                     ROUTE RACK COUNT                                                                     32

HSTN - ATLN

HOUSTON, TX                           1124 HARDY STREET, HOUSTON, TX 77020               $[******]        4

Kingwood (a\k\a Huffman or Harris)                            33902                      $[******]        1
                                                              Huffman-Cleveland R,
                                                              Huffman, TX 77336

Sour Lake (a\k\a Hardin)                                      29979 Highway 105,         $[******]        1
                                                              Sour Lake, TX 77659

Buna (a\k\a Jasper)                                           Hwy 62 South, Buna,        $[******]        1
                                                              TX 77612

Ragley (a\k\a Beauregard)                                     17329 Hwy 171 North,       $[******]        1
                                                              Ragley, LA 70657

Basile (a\k\a Evangeline)                                     1919 Hunter Rd.,           $[******]        2
                                                              Basile, LA 70515

Port Barre (a\k\a St. Landre or                               2343 Highway 359,          $[******]        1
Washington)                                                   Washington, LA 70589

Zachary Jct. (a\k\a Feliciana or                              1479 A Highway 964,        $[******]        1
Jackson)                                                      Jackson, LA 70748

SPUR TO NEW ORLEANS, LA

Greensburg (a\k\a St. Helena)                                 Hwy 43 North,              $[******]        1
                                                              Greensburg, LA 70441

Tylertown (a\k\a Walthall)                                    967 Hwy 583,               $[******]        1
                                                              Tylertown, MS 39667

Seminary (a\k\a Covington Co.)                                11 Kelly Creek Road,       $[******]        2
                                                              Seminary, MS 39479

SPUR TO JACKSON, MS

Laurel (a\k\a Jasper or Sandersville)                         1666 Bonner Road,          $[******]        1
                                                              Sandersville, MS
                                                              39477

Quitman (a\k\a Jasper Co.)                                    240 Vyvx Lane,             $[******]        1
                                                              Quitman, MS 39955

</Table>

   CONFIDENTIAL
   FIRST AMENDMENT TO COLLOCATION AND MAINTENANCE AGREEMENT
   EXHIBIT A-1

<PAGE>

   EXECUTION COPY

<Table>

<S>                              <C>                  <C>                              <C>             <C>

Linden (a\k\a Merengo or Sweetwater)                          Hwy 69 South,              $[******]        1
                                                              Sweetwater, AL 36782

Selma (a\k\a Dallas Co. or Browns)                            1713 County Road           $[******]        2
                                                              179, Browns, AL 36724

Clanton (a\k\a Chilton or                                     4521 Chilton Road          $[******]        1
Billingsley)                                                  #352, Billingsley,
                                                              AL 36006

SPUR TO BIRMINGHAM, AL

Alexander City (a\k\a Coosa or                                250 Highway 9,             $[******]        1
Kellyton)                                                     Kellyton, AL 35089

Wadley (a\k\a Randolph Co.)                                   1140 County Rd 41,         $[******]        1
                                                              Wadley, AL 36276

Newnan (a\k\a Coweta Co.)                                     65 Mayo Royal Road,        $[******]        1
                                                              Newnan, GA 30263
                     ROUTE RACK COUNT                                                                     25

MPLS - KSCY

MINNEAPOLIS, MN                       511 11TH AVE. SOUTH, SUITE 201, MINNEAPOLIS,       $[******]        2
                                      MN

Northfield                                                    6730 320th Street          $[******]        1
                                                              West, Northfield, MN
                                                              55057

Owantonna (a\k\a Hope)                                        6391 SW 68th Street,       $[******]        1
                                                              Owantonna, MN 55060

Hanlon Town (a\k\a Tenold)                                    807 435th Street,          $[******]        2
                                                              Hanlon Town, IA 50444

Latimer                                                       1825 Finch Avenue,         $[******]        1
                                                              Latimer, IA 50452

Roland                                                        12951 610th Avenue,        $[******]        1
                                                              Roland, IA 50236

DES MOINES, IA                        DES MOINES POP - 4500B CARLISLE ROAD, DES          $[******]        1
                                      MOINES, IA 50317

Osceola                                                       2241-B US Highway          $[******]        2
                                                              69, Osceola, IA 50213

Ridgeway                                                      20469 W. 230th             $[******]        1
                                                              Place, Ridgeway, MO
                                                              64481

Maysville (a\k\a Weathersby)                                  99 Southeast Dallas        $[******]        1
                                                              Road, Weathersby, MO
                                                              64497

Plattsburgh (a\k\a Lilly)                                     2821 Southwest             $[******]        1
                                                              Street, Plattsburg,
                                                              MO 64497

                     ROUTE RACK COUNT                                                                     14
</Table>

   CONFIDENTIAL
   FIRST AMENDMENT TO COLLOCATION AND MAINTENANCE AGREEMENT
   EXHIBIT A-1

<PAGE>

   EXECUTION COPY

<Table>

<S>                              <C>                  <C>                              <C>             <C>
SCRM - SNFC

SACRAMENTO, CA                        SACRAMENTO POP II - 1005 'B' STREET,               $[******]        2
                                      SACRAMENTO, CA 95814

Bay Point                                                     487 Canal Road, Bay        $[******]        1
                                                              Point, CA 94565

Creed                                                         6732 Creed Road,           $[******]        1
                                                              Suisin City, 94585

SAN FRANCISCO, CA                     SAN FRANCISCO POP - 200 PAUL ST., 4TH FLOOR,       $[******]        4
                                      SAN FRANCISCO, CA 94124                                            --
                     ROUTE RACK COUNT                                                                     8
                                                                                                        ---
               GRAND TOTAL RACK COUNT                                                                   133
                                                                                                        ===
</Table>

   CONFIDENTIAL
   FIRST AMENDMENT TO COLLOCATION AND MAINTENANCE AGREEMENT
   EXHIBIT A-1
<PAGE>
CONFIDENTIAL PORTION MARKED [*************] HAS BEEN OMITTED PURSUANT TO A
REQUEST FOR CONFIDENTIAL TREATMENT AND FILED SEPARATELY WITH THE SECURITIES
AND EXCHANGE COMMISSION.

            SECOND AMENDMENT TO COLLOCATION AND MAINTENANCE AGREEMENT

         THIS SECOND AMENDMENT (this "Amendment") is made by and between WILTEL
COMMUNICATIONS, LLC, a Delaware limited liability company ("Provider") and
METROMEDIA FIBER NETWORK SERVICES, INC. ("Customer") a Delaware corporation.

                                   Background

Metromedia Fiber National Network, Inc ("MFNN") and Provider entered into that
certain Collocation and Maintenance Agreement dated April 26, 2002, as amended
October 10, 2002 (the "Agreement").

The Agreement was wholly assigned by MFNN to Customer on October 10, 2002.

The parties now wish to amend the Agreement to change the total maintenance fee
obligation to conform to the number of Lessee Fibers under the Fiber Lease
Agreement and to add certain Collocation Sites in accordance with the terms set
forth in this Amendment.

NOW THEREFORE, for mutual consideration, the value of which the parties
acknowledge, the terms of the Agreement are amended as follows:

1. Capitalized terms not otherwise defined in this Amendment have the meaning
ascribed in the Agreement.

2. The clause in Section 2.1 "such amount currently totaling $[******] per month
(14,770 fiber miles x $[*])" is deleted and replaced with "such amount currently
totaling $[******] per month (14,410 fiber miles x $[*]):

3. Pursuant to Section 3.2 (a)(ii) of the Agreement, Customer hereby agrees
that, in addition to the Collocation Sites listed in the Agreement, Customer
shall pay for the additional Collocation Sites and corresponding number of racks
identified under both "Phase 1" and "Phase 2" in EXHIBIT A-1 to this Amendment
(the "Additional Collocation Sites"). The Parties further agree to update and
replace Exhibit A-1 at such time that all Additional Collocation Sites for
"Phase 2" of that exhibit have been identified. All Additional Collocation Sites
will be invoiced by WiltTel at the following rates:

         $[***] per rack per month at Transmission Sites (Op/Amp)

         $[***] per rack per month at POPs.

Such rates shall include HVAC and 20amps of negative 48v DC power per rack. Each
additional 10 amps up to 60 amps per rack total at the Additional Collocation
Sites shall be charged to Customer at the rate of $[***] per month. Customer
shall pay a non-recurring charge for initial installation of racks and the
provision of initial excess power requirements at the Additional Collocation
Sites as follows:

CONFIDENTIAL
SECOND AMENDMENT TO COLLOCATION AND MAINTENANCE AGREEMENT
PAGE 1 OF 3

<PAGE>

         $[*****] per Transmission Site (Op/Amp)

         $[*****] per POP

No other non-recurring charges shall apply to the initial installations at the
Additional Collocation Sites. Thereafter, except as set forth in paragraph 4,
all other non-recurring charges set forth in Subsection 2.2(b), (c), (d) and (e)
of the Agreement shall apply to the Additional Collocation Sites.

4. The parties acknowledge that the list of Additional Collocation Sites is
subject to amendment pursuant to a Master Agreement for Professional Services of
even date herewith between Customer and Williams Communications Managed
Services, LLC. Customer will not be charged any additional fees under
Subsections 2.2(b), (c) , (d) or (e) for such an amendment.

5. EFFECTIVE DATE. This Amendment is effective upon the date of the last
signature hereto ("Effective Date").

6. Except as amended, all of the terms and conditions of the Agreement continue
in full force and effect, neither party is in currently in default, and the
Agreement, as amended is hereby ratified and confirmed.

7. This Amendment may be executed in counterparts, each of which taken together
constitute one and the same instrument.

Signatures on following page

CONFIDENTIAL
SECOND AMENDMENT TO COLLOCATION AND MAINTENANCE AGREEMENT
PAGE 2 OF 3

<PAGE>

The parties have executed this Amendment on the dates set forth below above.

METROMEDIA FIBER NETWORK SERVICES, INC., a Delaware corporation

Signature:        /s/ William G. La Perch
          -------------------------------------------

(Print) Name:      William G. La Perch
              ---------------------------------------

(Print) Title:     SVP - Network Services
              ---------------------------------------

(Print) Date:      2/14/03
             ----------------------------------------

WILTEL COMMUNICATIONS, LLC, a Delaware limited liability company

Signature:        /s/ T. J. Gallagher
          -------------------------------------------

(Print) Name:      T. J. Gallagher
              ---------------------------------------

(Print) Title:    VP & GM, Business Development
              ---------------------------------------

(Print) Date:     2/14/03
             ----------------------------------------

CONFIDENTIAL
SECOND AMENDMENT TO COLLOCATION AND MAINTENANCE AGREEMENT
PAGE 3 OF 3

<PAGE>

                                   EXHIBIT A-1

                          ADDITIONAL COLLOCATION SITES

<Table>
<Caption>

                                                                PHASE 1

SALT LAKE CITY TO DENVER
                                                                                                       WCG             MFN
    SITE                            ADDRESS                          CITY                    ST        TYPE         # OF RACKS
    ----                             -------                         ----                    --        ----         ----------

<S>                         <C>                                   <C>                        <C>     <C>            <C>
SALT LAKE CITY              5035 HAROLD GATTY DRIVE               SALT LAKE CITY              UT       POP              0

  COALVILLE               1779 SOUTH EAST WANSHIP ROAD              COALVILLE                 UT      OP/AMP            1

HILLIARD FLATS                14563 STATE HWY 150                    EVANSTON                 WY      OP/AMP            1

 FORT BRIDGER                  3602 STATE HWY 412                  FORT BRIDGER               WY      OP/AMP            1

LITTLE AMERICA        7 CTY. RD.4-90 AMERICAN METHANOL RD.         GREEN RIVER                WY      REGEN             2

 SOUTH BAXTER           740 CTY. RD.30 SOUTH BAXTER ROAD           SOUTH BAXTER               WY      OP/AMP            1

  TABLE ROCK             168 CTY. RD.55 TABLE ROCK ROAD             TABLE ROCK                WY      OP/AMP            1

 ECHO SPRINGS               5.9M SO. SH789 EXIT 187                  RAWLINS                  WY      OP/AMP            1

   SINCLAIR                 6M SOUTH OFF PLANT ROAD                  SINCLAIR                 WY      OP/AMP            1

 ELK MOUNTAIN                   3M NORTH ON SH72                   ELK MOUNTAIN               WY      REGEN             2

 WEST LARAMIE                   824 HERRICK LANE                     LARAMIE                  WY      OP/AMP            1

   CHEYENNE                       310 ROAD 206                    GRANITE CANYON              WY      OP/AMP            1

     NUNN                  13485 WELD COUNTY ROAD 108                  NUNN                   CO      OP/AMP            1

 PLATTEVILLE                    350 FRONT STREET                   PLATTEVILLE                CO      OP/AMP            1

    DENVER                 910 15TH STREET SUITE 716                  DENVER                  CO       POP              4
                                                                                                                       --
                                                                                                              TOTAL    19
                                                                                                                       ==
</Table>

<Table>
<Caption>

MINNEAPOLIS TO BROADVIEW (CHICAGO)

                                                                                                       WCG             MFN
    SITE                            ADDRESS                          CITY                    ST        TYPE         # OF RACKS
    ----                             -------                         ----                    --        ----         ----------
<S>                        <C>                                     <C>                       <C>    <C>             <C>
   MINNEAPOLIS             511 11TH AVENUE SUITE 210               MINNEAPOLIS               MN       POP               1

     ROBERTS                   597 HIGHLAND DRIVE                    ROBERTS                 WI      OP/AMP             1

    MENOMONIE                 NORTH 6156 CTY RD. E                  MENOMONIE                WI      OP/AMP             1

    FALL CREEK                EAST 13435 CTY RD. D                  FALL CREEK               WI      OP/AMP             1

    MERRILLAN                WEST 10022 GARAGE ROAD                 MERRILLAN                WI      REGEN              2

      TOMAH                   29179 DORSETT AVENUE                    TOMAH                  WI      OP/AMP             1

   GRAND MARSH                  2655 5TH AVENUE                    GRAND MARSH               WI      OP/AMP             1

   PARDEEVILLE              NORTH 7883 STATE HWY 44                PARDEEVILLE               WI      OP/AMP             1

     MADISON                     612 WEST MAIN                       MADISON                 WI       POP               2

     DOUSMAN                   311 VENTURE DRIVE                     DOUSMAN                 WI      OP/AMP             1

    MILWAUKEE            507 SOUTH 2ND STREET SUITE 200             MILWAUKEE                WI       POP               1

       ZION                    43185 NORTH HWY 41                      ZION                  IL      OP/AMP             1

CHICAGO II (BRVW)              2101 ROBERTS DRIVE                   BROADVIEW                IL       POP               0
                                                                                                                       --
                                                                                                              TOTAL    14
                                                                                                                       ==

</Table>

CONFIDENTIAL
SECOND AMENDMENT TO COLLOCATION AND MAINTENANCE AGREEMENT
EXHIBIT A-1<PAGE>

                                                                   EXHIBIT 10.49

                       WILLIAMS COMMUNICATIONS GROUP, INC.
                     CHANGE IN CONTROL SEVERANCE PROTECTION
                                     PLAN I

             (as first amended and restated as of July 14, 2002, and
                  as amended and restated as of July 26, 2002)

                                  Introduction

         The Board of Directors of Williams Communications Group, Inc.
recognizes that, as is the case with many publicly held companies, there always
exists the possibility of a change in control of the Company. This possibility
and the uncertainty it creates may result in the loss or distraction of
executives of the Company and its subsidiaries to the detriment of the Company
and its enterprise value.

         The Board considers the avoidance of such loss and distraction to be
essential to protecting and enhancing the best interests of the Company and its
enterprise value. The Board also believes that when a change in control is
perceived as imminent, or is occurring, the Board should be able to receive and
rely on the executives' highest level of service to benefit the Company and its
enterprise value without concern that executives might be distracted or
concerned by the personal uncertainties and risks created by a change in
control.

         Accordingly, the Board has determined that appropriate steps should be
taken to assure the Company of the continued employment and attention and
dedication to duty of its executives and to ensure the availability of their
continued service, notwithstanding the possibility, threat or occurrence of a
change in control.

         In order to fulfill the above purposes, and recognizing that executives
shall be entitled to rely on the various benefits, the Board adopts, amends and
restates the Williams Communications Group, Inc. Change in Control Severance
Protection Plan I, effective as of April 18, 2002.

                        SECTION 1. ESTABLISHMENT OF PLAN

         As of the Effective Date, the Company established a severance
compensation plan known as the Williams Communications Group, Inc. Change in
Control Severance Protection Plan I, as set forth in this document, subject to
the next sentence, This Plan shall not take effect unless and until the purchase
by Leucadia National Corporation ("LNC") of shares of Common Stock of the
Company's reorganized successor in the Chapter 11 Plan shall have been
consummated pursuant to and in accordance with the terms and conditions of the
Investment Agreement, dated July 26, 2002, by and between the Company, Williams
Communications, LLC and LNC. If this Plan does not become effective pursuant to
the preceding sentence prior to February 28, 2003, the Plan shall continue in
accordance with the terms of the Williams Communications Group, Inc. Change in
Control Severance Protection Plan I attached hereto as Exhibit B as if this
amended and restated Plan had not been executed. For purposes hereof, the
"Chapter 11 Plan" means the

<PAGE>

plan of reorganization of the Company and its wholly owned subsidiary, CG
Austria, Inc., pursuant to a proceeding tinder Chapter 11 of the Bankruptcy Code
(II U.S.C. Section 1101, et seq.).

                             SECTION 2. DEFINITIONS

         2.01 Definitions. In addition to the terms defined elsewhere herein, as
used herein, the following words and phrases when used with initial capital
letters shall have the following respective meanings.

                  2.01.1 "Act" means the Securities Exchange Act of 1934, as
         amended from time to time,

                  2.01.2 "Affiliate" shall have the meaning ascribed to such
         term) in Rule 12b-2 of the General Rules and Regulations under the Act.

                  2.01.3 "Base Salary" means the amount a Participant is
         entitled to receive as salary on an annualized basis, excluding all
         bonus, overtime and incentive compensation, payable by the Company as
         consideration for the Participant's service, as in effect on the date
         immediately preceding termination of employment, or, if higher, as in
         effect immediately prior to the first occurrence of an event which
         constitutes Good Reason.

                  2.01.4 "Beneficial Ownership" shall include ownership of:

                           (a) any securities that such Person or any of such
                  Person's Affiliates is deemed to "beneficially own" within the
                  meaning of Rule 13d-3 under the Act, as in effect on the date
                  of this Plan;

                           (b) any securities (the "Underlying Securities") that
                  such Person or any of such Person's Affiliates has the right
                  to acquire (whether such right is exercisable immediately or
                  only after the passage of time) pursuant to any agreement,
                  arrangement or understanding (written or oral), or upon the
                  exercise of conversion rights, exchange rights, rights,
                  warrants or options, or otherwise (it being understood that
                  such Person will also be deemed to be the beneficial owner of
                  the securities convertible into or exchangeable for the
                  Underlying Securities); and

                           (c) any Securities beneficially owned by persons that
                  are part of a "group" (within the meaning of Rule 13d-5(b)
                  under the Act) with such Person.

                  2.01.5 "Board" means the Board of Directors of the Company.

                  2.01.6 "Change in Control" shall be deemed to have occurred if
         the event set forth in any one of the following paragraphs shall have
         occurred;

                           (a) Any Person, is or becomes the Beneficial Owner,
                  directly or indirectly, of securities of the Company
                  representing 25% or more of the combined voting power of the
                  Company's then outstanding securities; or

                                      -2-
<PAGE>

                           (b) The following individuals, cease for any reason
                  to constitute a majority of the number of Directors then
                  serving; individuals who, on April 18, 2002, constitute the
                  Board and any new Director (other than a Director whose
                  initial assumption of office is in connection with an actual
                  or threatened election contest, including but not limited to a
                  consent solicitation, relating to the election of Directors of
                  the Company) whose appointment or election by the Board or
                  nomination for election by the Company's stockholders was
                  approved or recommended by a vote of at least two-thirds (2/3)
                  of the Directors then still in office who either were
                  Directors on April 18, 2002, or whose appointment, election or
                  nomination for election was previously so approved or
                  recommended; provided, however that this paragraph (b) shall
                  not apply solely by virtue of a change in the individuals
                  constituting a majority of the number of directors as
                  implemented pursuant to a consummated plan of reorganization
                  of WCG or WCL in a proceeding under Chapter 11 of the
                  Bankruptcy Code (11 U.S.C. Section 1101, et seq.) ("Bankruptcy
                  Code") where the ownership of the common stock of the Company
                  is transferred only to creditors of the Company; or

                           (c) There is consummated a merger or consolidation of
                  the Company or any direct or indirect subsidiary of the
                  Company with any other corporation or entity, other than (i) a
                  merger or consolidation which results in the voting securities
                  of the Company outstanding immediately prior to such merger or
                  consolidation continuing to represent (either by remaining
                  outstanding or by being converted into voting securities of
                  the surviving entity or any parent thereof), in combination
                  with the ownership of any trustee or other fiduciary holding
                  securities under an employee benefit plan of the Company or
                  any Subsidiary of the Company, at least 51% of the combined
                  voting power of the securities of the Company or such
                  surviving entity or any parent thereof outstanding immediately
                  after such merger or consolidation, or (ii) a merger or
                  consolidation effected to implement a recapitalization of the
                  Company (or similar transaction) in which no Person is or
                  becomes the Beneficial Owner, directly or indirectly, of
                  securities of the Company representing 25% or more of the
                  combined voting power of the Company's then outstanding
                  securities; or

                           (d) The stockholders of the Company approve a plan of
                  complete liquidation or dissolution of the Company or there is
                  consummated an agreement for the sale or disposition by the
                  Company of all or substantially all of the Company's assets,
                  other than (i) a sale or disposition by the Company of all or
                  substantially all of the Company's assets to an entity, at
                  least 51% of the combined voting power of the voting
                  securities of which are owned by stockholders of the Company
                  in substantially the same proportions as their ownership of
                  the Company immediately prior to such sale or (ii) a sale or
                  disposition by the Company of all or substantially all of the
                  Company's assets to an entity, at least 51% of the combined
                  voting power of the voting securities of which are owned by
                  former creditors of the Company that received such securities
                  in respect of their claims upon consummation of a plan of
                  reorganization and in accordance with the terms of such plan
                  of reorganization of WCG or WCL in a proceeding under Chapter
                  11 of the Bankruptcy Code.

                                      -3-
<PAGE>

Notwithstanding the foregoing, a "Change in Control" shall not be deemed to have
occurred by virtue of the consummation of any transaction or series of
integrated transactions immediately following which the record holders of the
common stock of the Company immediately prior to such transaction or series of
transactions continue to have substantially the same proportionate ownership in
an entity which owns all or substantially all of the assets of the Company
immediately following such transaction or series of transactions.

                  2.01.7 "Code" means the Internal Revenue Code of 1986, as
         amended from time to time.

                  2.01.8 "Committee" means the individuals (not fewer than three
         in number) who, on the date six (6) months before the Change in
         Control, constitute the Compensation Committee of the Board, plus, in
         the event that fewer than three (3) individuals are available from the
         Compensation Committee as constituted on that date, such individuals as
         may be appointed by the individual or individuals who are so available
         (including for this purpose any individual or individuals previously so
         appointed); provided, however, that the maximum number of individuals
         constituting the Committee shall not exceed five (5).

                  2.01.9 "Company" means WCG and shall include any successor to
         its business and/or assets, whether by operation of law or otherwise,
         shall include WCL at any time that the voting securities of WCL are
         held by any Person other than WCG or its wholly owned Subsidiary, and
         shall include WCL and any other Subsidiary which has adopted the Plan
         where the context so requires.

                  2.01.10 "Director" when used in this Plan, means any
         individual who is a member of the Board of Directors of the Company.

                  2.01.11 "Disability" means a physical or mental incapacity of
         a Participant which substantially prevents the Participant, after
         reasonable accommodation, from performing the essential functions of
         his duties as they existed immediately prior to a Change in Control on
         a full-time basis for a period of six (6) calendar months out of any
         twelve (12) consecutive calendar month period and which could
         reasonably be expected to continue for a period of at least eighteen
         (18) months following such twelve (12) month period.

                  2.01.12 "Effective Date" means April 18, 2002.

                  2.01.13 "Eligible Employees" means those key executives or
         members of management of the Company (or of a Subsidiary which has
         adopted the Plan) who are designated in writing as Eligible Employees
         by the Company on Exhibit A, as it may be amended from time to time by
         the Company for purposes of this Plan. Although the Company can
         generally revoke the designation of an individual as an Eligible
         Employee, such a designation cannot be revoked (other than with the
         written consent of the affected Eligible Employee):

                           (i)      following a Change in Control, or

                                      -4-
<PAGE>

                           (ii)     during the period beginning on the date two
                                    (2) months prior to the Company's signing of
                                    any agreement the consummation of which
                                    would constitute a Change in Control and
                                    ending upon the earlier to occur of:

                                    (1) the second anniversary of a Change in
                                    Control; or

                                    (2) a cancellation of such an agreement,
                                    provided that the Company does not enter
                                    into a similar agreement within the six (6)
                                    months following such cancellation, or

                           (iii)    during the one-year period commencing April
                                    18, 2002.

         Eligible employees under the Plan shall not be eligible to participate
         in the Williams Communications Group, Inc. Change in Control Severance
         Protection Plan II, amended and restated as of December 6, 2001, as
         amended effective April 18, 2002, and from time to time.

                  2.01.14 "Employer" means the Company or a Subsidiary which has
         adopted the Plan pursuant to Section 9 hereof.

                  2.01.15 "ERISA" means the Employee Retirement Income Security
         Act of 1974, as amended from time to time.

                  2.01.16 "Good Reason" shall have the meaning set forth in
         subsection 4.02.1.2 of this Plan.

                  2.01.17 "Incentive Plan" means any and all of the Company's
         stock, bonus, sales incentive, and other incentive plans in existence
         now or immediately prior to a Change in Control.

                  2.01.18 "Participant" mean an Eligible Employee who becomes a
         Participant in accordance with subsection 3.01 hereof.

                  2.01.19 "Person" shall have the meaning given in Section
         3(a)(9) of the Exchange Act, as modified and used in Sections 13(d) and
         14(d) thereof, except that such term shall not include (i) the Company
         or any of its Subsidiaries, (ii) a trustee or other fiduciary holding
         securities under an employee benefit plan of the Company or any of its
         Affiliates, (iii) an underwriter temporarily holding securities
         pursuant to an offering of such securities, or (iv) a corporation
         owned, directly or indirectly, by the stockholders of the Company in
         substantially the same proportions as their ownership of stock of the
         Company.

                  2.01.20 "Plan" means the Williams Communications Group, Inc.
         Change in Control Severance Protection Plan I, as modified pursuant to
         Section 1 hereof, if at all.

                                      -5-
<PAGE>

                  2.01.21 "Related Party" means (i) a Subsidiary, (ii) an
         employee or group of employees of the Company or any Subsidiary, (iii)
         a trustee or other fiduciary holding securities under an employee
         benefit plan of the Company or any Subsidiary, or (iv) a corporation
         owned directly or indirectly by the stockholders of the Company in
         substantially the same proportion as their ownership of stock of the
         Company.

                  2.01.22 "Retirement" shall have the meaning ascribed to such
         term in the Company's governing tax-qualified retirement plan
         applicable to the Participant.

                  2.01.23 "Severance Benefit" means the amounts payable and
         benefits continued in accordance with Section 4 hereof.

                  2.01.24 "Subsidiary" means any corporation , partnership or
         joint venture in which the Company, directly or indirectly, holds a
         majority of the voting power of such corporation's outstanding shares
         of capital stock or a majority of the capital or profits interests of
         such partnership or joint venture.

                  2.01.25 "Target Incentive" means the target incentive
         established for a Participant under the annual bonus or annual
         incentive plan in which he participates with respect to the fiscal year
         in which his termination of employment occurs, or, if higher, with
         respect to the fiscal year immediately preceding the fiscal year in
         which occurs the first event which constitutes Good Reason.

                  2.01.26 "WCG" means Williams Communications Group, Inc.

                  2.01.27 "Termination Date" means the date of a termination of
         employment which gives rise to a Severance Benefit under this Plan.

                  2.01.28 "WCL" means Williams Communications, LLC, a wholly
         owned subsidiary of Williams Communications Group, Inc.

                             SECTION 3. ELIGIBILITY

         3.01 Participation. Each individual who is an Eligible Employee at the
time a Change in Control occurs shall become a Participant at that time,

         3.02 Duration of Participation. A Participant shall cease to be a
Participant when he ceases to be employed by the Company or a Subsidiary, unless
the termination of the Participant's employment is described in subsection
4.02.1 hereof. A Participant who becomes entitled to payment of a Severance
Benefit pursuant to subsections 4.02.1 and 4.03.1 shall remain a Participant
until the full amount of the Severance Benefit has been paid to the Participant.
Notwithstanding anything to the contrary, an Eligible Employee who is employed
by an Affiliate shall be covered by the provisions of this Plan.

                          SECTION 4. SEVERANCE BENEFIT

         4.01 Right to Severance Benefit, Subject to the execution and
effectiveness of the agreements required by subsection 4.03.1 hereof, a
Participant shall be entitled to receive a

                                      -6-
<PAGE>

Severance Benefit from the Company if a Change in Control has occurred and if,
within two (2) years thereafter, the Participant's employment by the Company
shall terminate for any reason specified in subsection 4.02.1 hereof, whether
the termination is voluntary or involuntary. Notwithstanding anything in this
Plan to the contrary, any termination of employment of the Participant with the
Company (a) not more than one hundred and eighty (180) days prior to the date on
which a Change in Control occurs, or (b) following the commencement of any
proceeding that ultimately results in a Change in Control, shall be deemed to be
a termination within two (2) years following a Change in Control for purposes of
this Plan.

         4.02 Termination of Employment,

                  4.02.1 Terminations That Give Rise to a Severance Benefit
         Under This Plan.

                           4.02.1.1 Except as set forth in subsection 4.02.2
                  hereof, any termination of employment of a Participant with
                  the Company by action of the Company within two (2) years
                  following a Change in Control (excluding any transfer to a
                  Subsidiary) shall entitle the Participant to a Severance
                  Benefit (subject to the execution and effectiveness of the
                  agreements required by subsection 4.03.1 hereof).

                           4.02.1.2 Any termination of employment of a
                  Participant with the Company by the Participant for Good
                  Reason shall entitle the Participant to a Severance Benefit
                  (subject to the execution and effectiveness of the agreements
                  required by subsection 4.03.1 hereof). For purposes of this
                  Plan, "Good Reason" means the occurrence, within two (2) years
                  following a Change in Control, of any of the following events,
                  unless the Participant has consented thereto;

                                    (i)      a material diminution in the
                                             Participant's duties, authorities
                                             or responsibilities,

                                    (ii)     a material reduction of total
                                             compensation, provided that any
                                             reduction in total compensation due
                                             to a reduction in amounts paid or
                                             payable as compared to amounts paid
                                             or payable in any prior period in
                                             accordance with the terms of the
                                             Annual Incentive Plan shall not
                                             constitute Good Reason,

                                    (iii)    removal from or failure to reelect
                                             the Participant to, any corporate
                                             office of the Company (other than
                                             due to the resignation by the
                                             officer or refusal to accept a
                                             nomination to such office), or

                                    (iv)     the Company has moved the
                                             Participant's principal office more
                                             than 200 miles from its location as
                                             of the effective date of any plan
                                             of reorganization of the Company in
                                             a proceeding under Chapter 11 of
                                             the Bankruptcy Code.

                                      -7-
<PAGE>

                  4.02.2 Terminations That Do Not Give Rise to a Severance
         Benefit Under This Plan. If a Participant's employment with the Company
         is terminated after a Change in Control due to Cause (as defined
         below), Disability, death, Retirement, or the Sale of a Business (as
         defined below), the Participant shall not be entitled to a Severance
         Benefit, regardless of the occurrence of a Change in Control.

                           4.02.2.1 A termination for Cause shall have occurred
                  when a Participant is terminated for (i) gross negligence,
                  recklessness or malfeasance in the performance of the
                  Participant's duties, (ii) commission by the Participant of
                  any criminal act, act or fraud or other material misconduct
                  resulting or intending to result directly or indirectly in
                  gain or personal enrichment at the expense of the Company,
                  (iii) willfully engaging in any conduct relating to the
                  business of the Company that could reasonably be expected to
                  have a materially detrimental effect on the business or
                  financial condition of the Company, (iv) misconduct which
                  materially discredits or damages the Company, or violates the
                  Company's policies or procedures, after the Company has
                  notified the Participant of the actions deemed to constitute
                  non-compliance, (v) the willful and continued failure by the
                  Participant substantially to perform his duties (other than
                  any such failure resulting from his disability), (vi) the
                  Participant's commission of any felony or any crime involving
                  moral turpitude, and (vii) the Participant's regulatory
                  disqualification which prevents, in a material manner, the
                  performance of the Participant's duties.

                           4.02.2.2 A termination due to the Sale of a Business
                  shall have occurred when, within two (2) years of a Change in
                  Control, the Company or the Participant's Employer has sold or
                  otherwise disposed of the Subsidiary, branch or other business
                  unit (or all or substantially all of the assets thereof) in
                  which the Participant was employed before such sale or
                  disposition to any Person, and the Participant has been
                  offered employment with the acquirer of such Subsidiary,
                  branch or unit on substantially the same terms and conditions
                  under which he worked for the Company. Such terms and
                  conditions shall include an agreement or plan binding on such
                  acquirer, providing that upon any termination of employment
                  with the acquirer of the sort described in subsection 4.02.1
                  hereof within two (2) years of such sale or disposition, the
                  acquirer shall pay to each such former Participant the
                  Severance Benefit that such former Participant would have
                  received under this Plan had he been a Participant at the time
                  of such termination.

         4.03 Severance Benefit,

                  4.03.1 If a Participant's employment is terminated under
         circumstances described in subsection 4.02.1 hereof, without the
         necessity of a claim being made under subsection 7.05 hereof, but
         subject to the execution by the Participant of the agreements described
         in clauses (x), (y) and (z) of the next sentence (and the effectiveness
         of such agreements), the Company shall pay such Participant in cash an
         amount (the "Severance Payment") equal to the amount indicated by the
         applicable formula on Exhibit A. Such amount shall be paid on or before
         the later of (i) the tenth (10th) business day following

                                      -8-
<PAGE>

         the date such termination takes effect, and (ii) the fifth (5th)
         business day following the date on which all three of the following
         agreements have been properly executed by the Participant, returned to
         the Company and have become effective by their terms: (x) a waiver and
         release of claims agreement, (y) a non-solicitation agreement, and (z)
         a confidentiality agreement, each in a form reasonably satisfactory to
         the Company.

                  4.03.2 A Participant who receives a payment under subsection
         4.03.1 hereof shall receive on the same date, an additional cash
         payment equal to the Target Incentive that, but for his termination,
         would have been payable to the Participant under the Company's annual
         bonus plan for the calendar year of his termination, assuming that all
         performance targets were met, but prorated based on the portion of the
         calendar year prior to the Participant's termination of employment.
         This payment shall be made without the necessity of a claim being made
         under subsection 7.05 hereof.

                  4.03.3 If a Participant receives a payment under subsection
         4.03.1 hereof, the Company shall continue for the "Deemed Severance
         Period" (determined in accordance with Exhibit A) after the
         Participant's termination of employment, to provide medical benefits to
         the Participant and the Participant's eligible dependents (if any) at
         least equal, and at no additional cost to the Participant and the
         Participant's eligible dependents (if any), to those that would have
         been provided in accordance with the Company's plans and policies in
         effect immediately prior to the Change in Control if the Participant's
         employment had not been terminated. If the terms of the plans do not
         permit continued participation by the Participant or his eligible
         dependents, the Company shall either arrange for substantially similar
         coverage or provide the Participant with a cash payment equal to the
         monetary equivalent thereof. Any continuing obligation by the Company
         with respect to medical benefits shall be reduced to the extent that
         the Participant obtains any such coverages and benefits pursuant to a
         subsequent employer's benefit plans while still receiving coverage from
         the Company, in which case the Company may reduce any of the coverages
         and benefits it is required to provide the Participant hereunder, so
         long as the aggregate coverages and benefits of the combined benefit
         plans is no less favorable to the Participant than the coverages and
         benefits required to be provided hereunder. Any medical benefits that
         have been paid in lump sum shall not be subject to the foregoing
         sentence. This subsection 4.03.3 shall not be interpreted so as to
         limit any benefits to which the Participant, the Participant's
         dependents or the Participant's beneficiaries may be entitled to under
         any of the Company's employee benefit plans, programs, or practices
         following the Participant's termination of employment, including,
         without limitation, retiree medical benefits.

                  4.03.4 Subject to subsection 4.04 hereof, benefits payable
         under this Plan shall be paid in addition to, and not in lieu of, all
         other accrued or vested or earned but deferred compensation rights,
         options, or other benefits which may be owed to a Participant following
         termination.

                  4.03.5 The Participant shall not be required to mitigate
         damages or the amount of this Severance Benefit by seeking other
         employment or otherwise, nor, except as provided in subsection 4.03.3,
         shall the amount of his Severance Benefit be reduced by

                                      -9-
<PAGE>

         any compensation earned by the Participant as a result of employment
         after his termination of employment with the Company.

         4.04 Exclusive Severance Benefit. Any Severance Benefit which becomes
payable to a Participant is in lieu of any other severance, change-in-control
severance or termination benefit which might otherwise become payable to the
Participant, whether pursuant to the Williams Communications Group, Inc. Change
in Control Severance Protection Plan II, the Williams Communications Group, Inc.
Severance Protection Plan, or otherwise.

                         SECTION 5. SUCCESSOR TO COMPANY

                  This Plan shall bind any successor (whether direct or
indirect, by purchase, merger, consolidation or otherwise) which becomes such on
or after a Change in Control has occurred to all or substantially all of the
business and/or assets of the Company or WCL in the same manner and to the same
extent that the Company or WCL would be obligated under this Plan if no
succession had taken place. In the case of any transaction in which a successor
(which becomes such on or after a Change in Control has occurred) would not by
the foregoing provision or by operation of law be bound by this Plan, the
Company and WCL shall require such successor expressly and unconditionally to
assume and agree to perform the Company's and WCL's obligations under this Plan,
in the same manner and to the same extent that the Company and WCL would be
required to perform if no such succession had taken place.

                 SECTION 6. DURATION, AMENDMENT AND TERMINATION

         6.01 Duration. The Plan shall continue indefinitely unless terminated
as provided in subsection 6.02 hereof.

         6.02 Amendment and Termination. Except as set forth below, the Plan may
not be amended or terminated at any time. The Plan may be terminated or amended
in any respect by a written resolution adopted by a majority vote of the Board
at any time except;

                           (i)      following a Change in Control, or

                           (ii)     during the period beginning on the date two
                                    (2) months prior to the Company's signing of
                                    any agreement the consummation of which
                                    would constitute a Change in Control and
                                    ending upon the earlier to occur of:

                                    (1) the second anniversary of a Change in
                                    Control; or

                                    (2) a cancellation of such an agreement,
                                    provided that the Company does not enter
                                    into a similar agreement within the six (6)
                                    months following such cancellation, or

                           (iii)    during the one-year period commencing April
                                    18, 2002.

Notwithstanding the foregoing, the Plan may be amended from time to time (I)
with the unanimous written consent of the Eligible Employees listed on Exhibit A
who are then active

                                      -10-
<PAGE>

employees of the Company, or (II) to the extent that such amendment increases
the benefits payable under the Plan or otherwise constitutes a bona tide
improvement of the rights of Participants and/or Eligible Employees under the
Plan or does not affect either Participants or Eligible Employees in any adverse
manner without their express written consent thereto.

                            SECTION 7. ADMINISTRATION

         7.01 Allocation of Responsibilities.

                  7.01.1 Board of Directors. The Board shall have exclusive
         authority and responsibility for:

                           (a) The amendment or termination of this Plan in
                  accordance with subsection 6.02 hereof; and

                           (b) The delegation to the Committee of any authority
                  and responsibility reserved herein to the Board.

                  7.01.2 Committee. The Committee shall serve as plan
         administrator and shall have exclusive authority and responsibility for
         those functions set forth in subsection 7.02 hereof, and in other
         provisions of this Plan.

         7.02 Provisions Concerning the Committee.

                  7.02.1 Membership and Voting. The Committee shall serve as
         plan administrator. The Committee shall consist of not less than three
         (3) members. The Committee shall act by a majority of its members at
         the time in office, and such action may be taken by a vote at a
         meeting, in writing without a meeting, or by telephonic communications.
         Attendance at a meeting shall constitute waiver of notice thereof A
         member of the Committee who is a Participant of the Plan shall not vote
         on any question relating specifically to such Participant. Any such
         action shall be voted or decided by a majority of the remaining members
         of the Committee. The Committee shall designate one (1) of its members
         as the Chairman and shall appoint a Secretary who may, but need not, be
         a member thereof. The Committee may appoint from its members such
         subcommittees with such powers as the Committee shall determine.

                  7.02.2 Duties of the Committee. The Committee shall administer
         the Plan in accordance with its terms and shall have all the powers
         necessary to carry out such terms. The Committee shall execute any
         certificate, instrument or other written direction on behalf of the
         Plan and may make any payment on behalf of the Plan, All
         interpretations of this Plan, and questions concerning its
         administration and application, shall be determined by the Committee
         (or its delegate). The Committee may appoint such accountants, counsel,
         specialists, and other persons as it deems necessary or desirable in
         connection with the administration of this Plan. Such accountants and
         counsel may, but need not, be accountants and counsel for the Company
         or a Related Party.

         7.03 Delegation of Responsibilities Bonding.

                                      -11-
<PAGE>

                  7.03.1 Delegation and Allocation. The Board and the Committee,
         respectively, shall have the authority to delegate or allocate, from
         time to time, by a written instrument, all or any part of their
         responsibilities under this Plan to such person or persons as each may
         deem advisable and in the same manner to revoke any such delegation or
         allocation of responsibility. Any action of a person in the exercise of
         such delegated or allocated responsibility shall have the same force
         and effect for all purposes hereunder as if such action had been taken
         by the Board, or the Committee. The Company, the Board, or the
         Committee shall not be liable for any acts or omissions of any such
         person, who shall periodically report to the Board or the Committee, as
         applicable, concerning the discharge of the delegated or allocated
         responsibilities.

                  7.03.2 Bonding. The members of the Committee shall serve
         without bond (except as expressly required by federal law) and without
         compensation for their services as such.

         7.04 Information to be Supplied by the Company. The Company shall
provide to the Committee or its delegate such information as it shall from time
to time need in the discharge of its duties.

         7.05 Claims Procedure.

                  7.05.1 Initial Claim for Benefits. Each Participant or
         beneficiary may submit his claim for benefits to the Committee (or to
         such other person as may be designated by the Committee) in writing in
         such form as is permitted by the Committee. A Participant shall have no
         right to seek review of a denial of benefits, or to bring any action in
         any court to enforce a claim for benefits prior to his filing a claim
         for benefits and exhausting his rights to review under subsections
         7.05.1 and 7.05.2.

                  When a claim for benefits has been filed properly, such claim
         for benefits shall be evaluated and the claimant shall be notified of
         the approval or the denial within ninety (90) days after the receipt of
         such claim unless special circumstances require an extension of time
         for processing the claim. If such an extension of time for processing
         is required, written notice of the extension shall be furnished to the
         claimant prior to the termination of the initial ninety (90) day period
         which shall specify the special circumstances requiring an extension
         and the date by which a final decision will be reached (which date
         shall not be later than one hundred and eighty (180) days after the
         date on which the claim was filed). A claimant shall be given a written
         notice in which the claimant shall be advised as to whether the claim
         is granted or denied, in whole or in part. If a claim is denied, in
         whole or in part, the claimant shall be given written notice which
         shall contain (a) the specific reasons for the denial, (b) references
         to pertinent plan provisions upon which the denial is based, (c) a
         description of any additional material or information necessary to
         perfect the claim and an explanation of why such material or
         information is necessary, and (d) the claimant's rights to seek review
         of the denial.

                  7.05.2 Review of Claim Denial. If a claim is denied, in whole
         or in part, the claimant shall have the right to request that the
         Committee review the denial, provided that the claimant files a written
         request for review with the Committee within sixty (60)

                                      -12-
<PAGE>

         days after the date on which the claimant received written notification
         of the denial. A claimant (or his duly authorized representative) may
         review pertinent documents and submit issues and comments in writing to
         the Committee. Within sixty (60) days after a request for review is
         received, the review shall be made and the claimant shall be advised in
         writing of the decision on review, unless special circumstances require
         an extension of time for processing the review, in which case the
         claimant shall be given a Written notification within such initial
         sixty (60) day period specifying the reasons for the extension and when
         such review shall be completed (provided that such review shall be
         completed within one hundred and twenty (120) days after the date on
         which the request for review was filed). The decision on review shall
         be forwarded to the claimant in writing and shall include specific
         reasons for the decision and references to plan provisions upon which
         the decision is based. If a claimant shall fail to file a request for
         review in accordance with the procedures herein outlined, such claimant
         shall have no rights to review and shall have no right to bring action
         in any court and the denial of the claim shall become final and binding
         on all persons for all purposes.

                             SECTION 8. TAX PAYMENTS

         8.01 The Company agrees that it will proactively work with the
Executive to identify and implement structures to minimize or eliminate the
excise tax as described in Section 8.02.

         8.02 Notwithstanding any provision of this Plan to the contrary, if any
amount or benefit to be paid or provided under this Plan would, singly, or in
combination with other payments or benefits received or to be received by the
Participant from the Company, be an "Excess Parachute Payment," within the
meaning of Section 280G of the Internal Revenue Code of 1986, as amended (the
"Code"), or any successor provision thereto, but for the application of this
sentence, then the payments and benefits to be paid or provided under this Plan
shall be reduced to the minimum extent necessary (but in no event to less than
zero) so that no portion of any such payment or benefit provided under this
Plan, as so reduced, constitutes an Excess Parachute Payment provided, however,
that the foregoing reduction shall be made only f and to the extent that such
reduction would result in an increase in the aggregate payment and benefits to
be provided under this Plan and such other payments or benefits, determined on
an after-tax basis (taking into account the excise tax imposed pursuant to
Section 4999 of the Code, or any successor provision thereto, any tax imposed by
any comparable provision of state law, and any applicable federal, state and
local income taxes). The determination of whether any reduction in such payment
or benefits to be provided under this Plan is required pursuant to the preceding
sentence shall be made at the expense of the Company, if requested by the
Participant or the Company, by the Company's independent accountants. The fact
that the Participant's right to payments or benefits provided under this Plan
may be reduced by reason of the limitations contained in this Section 8.02 shall
not itself limit or otherwise affect any other rights of the Participant other
than pursuant to this Plan. In the event that any payment or benefit intended to
be provided tinder this Plan is required to be reduced pursuant to this Section
8.02, the Participant shall be entitled to designate the payments and/or
benefits to be so reduced in order to give effect to this Section 8.02. The
Company shall provide the Participant with all information reasonably requested
by the Participant to permit the Participant to make such designation. In the
event that the Participant fails to make such designation within 10 business
days of the Termination Date, the Company may effect such reduction in any
manner it deems appropriate.

                                      -13-
<PAGE>

                       SECTION 9. PARTICIPATING EMPLOYERS

         This Plan may be adopted by any Subsidiary or Affiliate. Upon such
adoption, the Subsidiary or Affiliate shall become an Employer and the
provisions of the Plan shall be fully applicable to the employees of that
Subsidiary or Affiliate who are designated by the Company as Eligible Employees
in accordance with subsection 2.01.13 hereof and become Participants in
accordance with subsection 3.01 hereof This Plan established and vests in each
Participant a contractual right to the benefits to which he may become entitled
hereunder, enforceable by the Participant against his Employer. The Company
agrees unconditionally to guarantee the performance by, and obligation of; each
Employer under the Plan.

                           SECTION 10. MISCELLANEOUS

         10.01 Payment Obligations Absolute. The Company's obligation to pay any
amounts or to provide benefits continuation or any other benefits described in
subsection 4.03 hereof shall be absolute and unconditional (except as expressly
stated in this Plan) arid shall not be affected by any circumstances, including,
without limitation, any set-off; counterclaim, recoupment, defense or other
right which the Company or any of its Subsidiaries may have against any
Participant.

         10.02 Indemnification. If a Participant institutes any legal action in
seeking to obtain or enforce, or is required to defend in any legal action the
validity or enforceability of, any right or benefit provided by the Plan, the
Company shall pay for all reasonable legal fees and expenses incurred by such
Participant.

         10.03 Employment Status. The Plan does not constitute a contract of
employment or impose on the Participant or the Company any obligation to retain
the Participant as an employee of the Company or a Subsidiary, to change the
status of the Participant's employment, or to change the policies of the Company
or its Subsidiaries regarding termination of employment.

         10.04 Validity and Severability. The invalidity or unenforceability of
any provision of the Plan shall not affect the validity or enforceability of any
other provision of the Plan, which shall remain in full force and effect, and
any prohibition or unenforceability in any jurisdiction shall not invalidate or
render unenforceable such provision in any other jurisdiction.

         10.05 Governing Law. The validity, interpretation, construction and
performance of the Plan shall in all respects be governed by the laws of the
United States and, to the extent not preempted by such laws, by the laws of the
State of Delaware, without regard to choice of law principles.

         10.06 Withholding of Taxes. The Company or its Subsidiaries may
withhold from any amounts payable under the Plan all federal, state, city and/or
other taxes as shall be legally required.

         10.07 Obligations Unfunded. All benefits due a Participant under this
Plan are unfunded and unsecured and are payable out of the general funds of the
Company. The Company and/or one or more Subsidiaries may establish a "grantor
trust" for the payment of benefits and

                                      -14-
<PAGE>

obligations hereunder, provided however; that the grantor shall remain
responsible for the payment of any such benefits and obligations which are not
so paid by any such trust.

         10.08 Construction. For purposes of this Plan, the following rules of
construction shall apply;

                  10.08.1 No action or failure to act on the Participant's part
         shall be considered "willful" unless done or omitted to be done by the
         Participant not in good faith and without reasonable belief that such
         action or omission was in the best interest of the Company or a
         Subsidiary.

                  10.08.2 The word "or" is used as a disjunctive but not
         necessarily exclusively, as the context may require.

                  10.08.3 Words in the singular include the plural; words in
         the plural include the singular; and words in the neuter gender include
         the masculine and feminine genders and words in the masculine or
         feminine gender include the other and neuter genders.

         This amended and restated Plan was adopted by the Company as of the
18th day of April, 2002 and amended and restated as of July 14, 2002. The
changes made in this amendment and restatement are effective as of the 26th day
of July 2002.

                                         WILLIAMS COMMUNICATIONS GROUP, INC.

Date: July 26, 2002                      By: /s/ GERALD L. CARSON
                                             ---------------------------
                                             GERALD L. CARSON
                                             Chief People Officer

         Williams Communications, LLC adopted the Plan as of the 18th day of
April, 2002, as provided in Section 9. The changes made in this amendment and
restatement are effective as of the 26th day of July 2002.

                                         WILLIAMS COMMUNICATIONS , LLC

Date: July 26, 2002                      By: /s/ GERALD L. CARSON
                                             ---------------------------
                                             GERALD L. CARSON
                                             Chief People Officer

                                      -15-
<PAGE>

                                    EXHIBIT A

                               ELIGIBLE EMPLOYEES
                           DEEMED SEVERANCE PERIOD AND
                        CALCULATION OF SEVERANCE PAYMENT

<Table>
<Caption>
                                                                     Deemed
     Name and Title                 Applicable Formula          Severance Period
--------------------------   -------------------------------   ------------------
<S>                          <C>                               <C>

General Counsel, P. David    3 times the sum of Base Salary     3 years
Newsome, Jr.                 plus Target Incentive

Senior Management Group:     2 times the sum of Base Salary     2 years
                             plus Target Incentive
Matthew W. Bross

Jeffrey K. Storey

Howard S. Kalika
</Table>

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