CONFIDENTIAL TREATMENT

                       CAPACITY LEASE AND IRU AGREEMENT

         THIS CAPACITY LEASE AND IRU AGREEMENT ("Agreement") is made and
entered into as of the 11th day of February, 1999, by and between LEVEL 3
COMMUNICATIONS, LLC, a Delaware limited liability company ("Grantor") and
Communication TeleSystems International, d/b/a "WorldxChange Communications",
a California corporation ("Grantee")

                                  RECITALS

         A.   Grantor is currently constructing a nationwide multiconduit
fiber optic communications system (the "Grantor System") connecting the
cities identified on Exhibit "A" attached hereto. In addition, Grantor has
and will enter into various arrangements with carriers pursuant to which
Grantor has leased or obtained the right to use fibers, fiber capacity or
transport capacity connecting the cities identified on Exhibit "A" (the
"Leased System").

         B.   Grantee desires to obtain the right to use transport capacity
along the Leased System and the Grantor System.

         C.   Grantor desires to grant to Grantee, and Grantee desires to
obtain from Grantor, a lease in the Capacity (as defined below) and (after
such lease term expires) an indefeasible right to use the Capacity, all upon
and subject to the terms and conditions set forth below. Grantor and Grantee
further desire that the provisions of this Agreement would be generally
applicable to future orders for transport capacity submitted by Grantee and
accepted by Grantor under the terms of this Agreement.


                                   ARTICLE 1
                                 DEFINITIONS

         1.1  "Acceptance Date" shall mean the date when Grantee delivers (or
      is deemed to have delivered) notice of acceptance of a
      Completion Notice with respect to a Segment in accordance with
      Article 8.

         1.2  "Acceptance Testing" shall have the meaning set forth in
      Article 8.

         1.3  "Access Points" shall have the meaning set forth in Article 9.

         1.4  "Affiliate" shall mean, with respect to any specified Person,
      any other Person that directly or indirectly, through one or
      more intermediaries, controls, is controlled by, or is under
      common control with, such specified Person ("control,"
      "controlled by" and "under common control with" shall mean the
      possession, directly or indirectly, of the power to direct or
      cause the direction of the management and policies of a Person,
      whether through ownership of voting securities, by contract or
      credit arrangement, as trustee or executor, or otherwise).

         1.5  "Availability Notice" shall have the meaning set forth in
      Section 7.3.


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         1.6  "Capacity" shall mean the transmission capacity ordered by
              Grantee and provided by Grantor under the terms of this
              Agreement. Capacity shall include, for purposes of this
              Agreement, transmission capacity between two points each of
              which is a Grantor "gateway" facilities in each city set forth
              in Exhibit "A" (all of which are within the continental United
              States), as well as additional cities ("Additional Cities")
              when and as Grantor establishes a "gateway" facility in such
              cities and commences delivery of private line service to other
              customers through the Leased System or the Grantor System to
              and from such gateway facilities.

         1.7  "Capacity Fee" shall mean the fee calculated in accordance with
              Exhibit "B" and due and payable in accordance with Section 5.1.

         1.8  "Committed Capacity" shall have the meaning set forth in
              Section 7.7.

         1.9  "Completion Notice" shall have the meaning set forth in
              Section 8.2.

         1.10 "Dispute Notice" shall have the meaning set forth in
              Article 20.

         1.11 "Effective Date" shall have the meaning set forth in Article 6.

         1.12 "Force Majeure Event" shall have the meaning set forth in
              Article 15.

         1.13 "Grantor System" shall have the meaning set forth in the
              Recitals.

         1.14 "IRU" shall have the meaning set forth in Article 4.

         1.15 "IRU Term" shall have the meaning set forth in Article 6.

         1.16 "Leased System" shall have the meaning set forth in the
              Recitals.

         1.17 "Lease Term" shall have the meaning set forth in Article 6.

         1.18 "Mileage" shall mean the distance between the Segment End
              Points for each Segment, measured on a straight line or "air
              miles" basis (regardless of the route miles for the Grantor
              System or the Leased System).

         1.19 "Operations and Maintenance Fee" shall mean the fee calculated
              in accordance with Exhibit "B" and due and payable in
              accordance with Section 5.1.

         1.20 "Person" shall mean any natural person, corporation,
              partnership, limited liability company, business trust, joint
              venture, association, company or governmental authority.

         1.21 "Prime Rate" shall mean, as of any relevant date, the interest
              rate most recently published in the Money Rates Section of THE
              WALL STREET JOURNAL as the prime rate.

         1.22 "Proprietary Information" shall have the meaning set forth in
              Section 19.1.

         1.23 "Segments" shall have the meaning set forth in Section 2.1.

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         1.24 "Segment End Points" shall have the meaning set forth in
              Section 2.1.

         1.25 "System Route" shall have the meaning set forth in Section 2.1.

         1.26 "Term" shall have the meaning set forth in Article 6.


                                    ARTICLE 2
                                  GRANTOR SYSTEM


         2.1  The Grantor System will connect the city pairs identified on
              Exhibit "A" attached hereto (each city identified on Exhibit
              "A" and each Additional City (as applicable) is herein called a
              "Segment End Point" (each of which shall be located in
              Grantor's "gateway" facility in such city), the route between
              the applicable Segment End Points is herein called a "Segment",
              and all of the Segments together are herein called the "System
              Route"). The specific location of the System Route between
              Segment End Points is subject to Grantor obtaining the
              applicable permits, rights and rights of way; however, the
              System Route will connect the Segment End Points for each
              Segment. Each Segment End Point of the Grantor System and the
              Leased System shall be served by at least one of the local
              exchange carriers specified on Exhibit "D" attached hereto (the
              "Qualified LECs") which has sufficient capacity available at
              the Segment End Points to permit Grantee to obtain
              interconnection of the Capacity to Grantee's network.

         2.2  Notwithstanding anything to the contrary contained herein,
              Grantor may elect, at its option, to acquire any portion of the
              Grantor System from third parties (whether under a lease,
              sublease, indefeasible right of use, or otherwise) in lieu of
              constructing and installing the Grantor System respecting such
              portion; provided, any such acquisition shall not relieve
              Grantor of its obligation to provide the Capacity in accordance
              with the terms of this Agreement.


                                    ARTICLE 3
                                  LEASED SYSTEM

The Capacity will be made available to Grantee over the Leased System
between the cities identified on Exhibit "A" and each Additional City,
as applicable. Upon completion of the Grantor System, Grantor shall be
permitted to migrate Capacity from the Leased System to the Grantor System,
which migration shall be performed at no cost to Grantee. Grantor shall
cooperate with Grantee to perform such migration in a manner and at a time
which is reasonably designed to minimize the extent and duration of any
interruption in Grantee's use of the Capacity, including performance of a
parallel "hot cut." Grantor agrees that the Segment End Points shall not be
altered as a result of migration of the Capacity from the Leased System to
the Grantor System. Grantor shall provide at least sixty (60) days prior
notice to Grantee of the migration for each Segment involved. Additionally,
Grantor shall reimburse Grantee for all reasonable costs and expenses
incurred by Grantee which are required as a result of such migration.

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                                   ARTICLE 4
                      LEASE OF CAPACITY AND GRANT OF IRU

As of the Effective Date for each particular Segment along which Capacity is
delivered by Grantor to Grantee hereunder, Grantor hereby leases to Grantee,
and Grantee hereby leases from Grantor for the Lease Term (as defined in
Article 6 hereof), the Capacity between the Segment End Points for each such
Segment. Upon expiration of each Lease Term (and provided that Grantee is not
then in default in the performance hereof, including (but not limited to) its
payment in full of the Capacity Fee and the Operations and Maintenance Fee),
Grantor shall grant to Grantee, and Grantee shall acquire from Grantor, an
exclusive indefeasible right of use in, for the purposes described herein and
for the IRU Term (as defined in Article 6 hereof), the Capacity between the
Segment End Points for each such Segment (the "IRU").


                                   ARTICLE 5
                               FEES AND PAYMENT

         5.1  The Capacity Fee shall be calculated on the basis of the
              Mileage for each Segment as set forth on Exhibit "B". [  *  ]
              of the Capacity Fee for each Segment (the "Initial Payment")
              shall be due and payable within five (5) days after the
              Acceptance Date for each Segment. The balance of the Capacity Fee
              shall accrue interest at the rate of [  *  ]  per annum and shall
              be due and payable monthly in advance (with the first payment due
              on the first day of the month following the Acceptance Date and
              subsequent payments due on the first day of each month
              thereafter) over sixty (60) months, in equal monthly installments
              of principal and interest. The first monthly installment of the
              Capacity Fee shall include a prorated payment (based on a thirty
              (30) day month) of the Capacity Fee for the period of time from
              and after the Acceptance Date until the date such first monthly
              installment is due.

         5.2  In addition to the Capacity Fee, Grantee shall, on the
              Acceptance Date and on or before the first day of each month
              thereafter during the Term, pay Grantor the Operations and
              Maintenance Fee calculated on the basis of the Mileage for each
              Segment as set forth on Exhibit "B". The Operations and
              Maintenance Fee for the first and last month of the Term shall
              be prorated based on a thirty (30) day month. The Operations
              and Maintenance Fee set forth in Exhibit "B" shall be increased
              on each anniversary of the Acceptance Date of the first Segment
              by the lesser of (a) the increase, if any, in the Consumer
              Price Index, All Urban Consumers (CPI-U), U.S. City Average,
              published by the United States Department of Labor, Bureau of
              Labor Statistics, for the preceding twelve (12) month period,
              or (b) [  *  ]. In the event the above-described index shall
              cease to be computed or published, Grantor may, in its reasonable
              discretion, designate a successor index to be used in determining
              any increase to the Operations and Maintenance Fee.

         5.3  Nonrecurring charges for reconfigurations or swaps on the
              Capacity shall be as set forth in Exhibit "F", and shall be
              paid within thirty (30) days of Grantee's receipt of an invoice
              for such charges.


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         5.4  All payments made by Grantee under this Article shall be made
              without any deduction or withholding for or on account of any
              tax, duty or other charges of whatever nature imposed by any
              taxing or governmental authority, but excluding taxes or other
              impositions relating to the income or profits of Grantor
              (collectively "Taxes"). If Grantee is or was required by law to
              make any deduction or withholding from any payment due
              hereunder to Grantor (other than as a result of Grantee's
              receipt of a garnishment from a taxing authority respecting
              taxes owed or allegedly owed by Grantor), then, notwithstanding
              anything to the contrary contained in this Agreement, the gross
              amount payable by Grantee to Grantor will be increased so that,
              after any such deduction or withholding for Taxes, the net
              amount received by Grantor will not be less than Grantor would
              have received had no such deduction or withholding been
              required.

         5.5  Except for taxes based on Grantor's net income and except with
              respect to ad valorem personal and real property taxes imposed
              on Grantor's property, Grantee shall be responsible for payment
              of all sales, use, gross receipts, excise, access, bypass,
              surcharge, franchise or other local, state and federal taxes,
              fees, charges, or surcharges, however designated, imposed on or
              based upon the provision, sale or use of the Capacity delivered
              by Grantor. Any such taxes required to be paid by Grantor shall
              be separately noted and added to the Operations and Maintenance
              Fee. Any federal, state or local tax, fee, charge, or surcharge
              shall be payable only for Capacity that is subject to such
              imposition.

         5.6  Any sums not paid by Grantee when due shall bear interest at
              the rate of [  *  ] per month or the highest rate permitted by
              law (whichever is lower), from the date payment was due until
              paid in full.

                                   ARTICLE 6
                                     TERM

The lease of Capacity with respect to each Segment shall become effective on
the first day when both (i) the Acceptance Date with respect to the Segment
has occurred and (ii) Grantor has received the Initial Payment due to Grantor
under Section 5.1 with respect to such Capacity (the "Effective Date"). The
term of the lease of Capacity shall expire, with respect to each order for
Capacity, on the fifth anniversary of the Effective Date (or such sooner date
as provided in Article 16 hereof) (the "Lease Term"). The IRU with respect to
Capacity ordered shall commence upon expiration of the Lease Term for such
Capacity (provided that the Lease Term has not been terminated under Article
16 hereof and further provided that Grantee is not then in material default
hereof). Subject to the provisions of Article 16, the IRU with respect to
each Segment shall terminate fifteen (15) years after the termination of the
Lease Term (the "IRU Term"). The Lease Term and the IRU Term shall
collectively be referred to as the "Term."

                                   ARTICLE 7
                               ORDERS FOR CAPACITY

         7.1  Grantee may (but is not hereby obligated, except as otherwise
              provided in Section 7.7 hereof), for a period of five (5) years
              after execution of this Agreement, submit orders to Grantor for
              the delivery of Capacity ("Orders") under the terms of this
              Agreement.


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              Grantor shall, except as otherwise provided herein, deliver
              such Capacity between the Segment End Points under the terms of
              this Agreement.

         7.2  Any Order for the delivery of Capacity by Grantee shall be made
              in writing and shall contain the following information: (a) the
              level or amount of Capacity requested (Grantee shall be
              permitted to order Capacity in increments of no less than [  *  ]
              and no greater than [  *  ]), (b) the city pairs between which
              such Capacity is requested, (c) any date(s) upon which Grantee
              requires such Capacity (which, unless otherwise agreed by
              Grantor, shall be no later than ninety (90) days from the date
              of the request), and (d) such other information Grantee deems
              reasonably necessary including required Ancillary Services as
              set forth in Exhibit "F" hereto. Grantee must submit such
              requests to Grantor by facsimile or E-Mail as mutually agreed
              upon to the contact identified by Grantor.

         7.3  Grantor shall, within five (5) days after the receipt of such
              Order, either (a) request additional information from Grantee
              respecting such request (but only in the event that information
              on Grantor's standard order form has not been supplied by
              Grantee), (b) deliver written notice to Grantee that Grantor
              will not provide the requested Capacity, setting forth in such
              notice the reason(s) why such requested Capacity cannot be
              provided or (c) deliver written notice to Grantee (the
              "Availability Notice") stating that the requested Capacity can
              be provided on terms contained in this Agreement and in the
              written request. In the event that Grantor fails to respond to
              an Order within five (5) days after receipt thereof, Grantee
              shall provide Grantor's designated representative with E-Mail
              or facsimile notice, as mutually agreed upon by both parties,
              of such failure and Grantor shall have one (1) business day
              after receipt of such E-Mail or facsimile notice within which
              to cure its failure to respond to the Order. In the event
              Grantor fails to so cure, Grantor shall be deemed to have
              refused to provide the requested Capacity. The Availability
              Notice shall include a specification of the channel facility
              assignment to one of the Qualified LECs, if then known to
              Grantor, as well as a Letter of Agency ("LOA") which authorizes
              Grantee to order the necessary local facilities. If Grantor is
              unable to provide specification of the channel facility
              assignment to a Qualified LEC at the time of the Availability
              Notice, Grantor shall provide such specification (together with
              the LOA) on the last to occur of (a) fifteen (15) days after
              delivery of the Availability Notice, or (b) thirty (30) days
              prior to the requested start date for the subject Capacity. The
              failure of Grantor to provide a written specification of the
              channel facility assignment or the LOA within the time
              specified above shall be treated as a rejection by Grantor of
              the Order and shall entitle Grantee to pursue the remedy set
              forth in Section 16.4 of this Agreement. Grantor's issuance of
              the Availability Notice constitutes a firm order and Grantee
              will then have until ten (10) days prior to the requested start
              date for the subject Capacity to cancel the Order with no
              cancellation charges. Should Grantee cancel the order after the
              period 10 days prior to the requested start date for the subject
              Capacity, Grantee will then be obligated to pay a cancellation
              fee in the amount set forth in Exhibit "F". In the event Grantee
              cancels an order for Capacity, Grantor shall have no obligation
              to provide the Capacity specified therein, and Grantee shall not
              be obligated to accept such Capacity. Grantee may not cancel any
              order after Grantor has provided a Completion Notice for the
              subject Capacity.

         7.4  Grantee shall, no later than ten (10) days prior to the
              requested start date for the subject Capacity, provide Grantor
              with the "Design Layout Record" or "DLR" for the local


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     facility to which such Capacity shall be connected. Grantee's failure to
     deliver such information to Grantor as within the time stated above shall
     extend, on a day-for-day basis, the time within which Grantor is
     otherwise obligated to deliver such Capacity to Grantee.

7.5  The terms and provisions of this Agreement shall, unless otherwise
     agreed in writing by the parties, be applicable to the delivery of the
     Capacity.

7.6  Grantor agrees to deliver a Completion Notice with respect to Capacity
     ordered between the Segment Endpoints listed on Exhibit "A" within the
     following times:

          (a) [  *  ] days after receipt of an Order for any Orders
     submitted within the first [  *  ] after execution hereof;

          (b) [  *  ] after receipt of an Order (other than Orders
     submitted within the first [  *  ] after execution hereof) for
     DS-3 Capacity;

          (c) [  *  ] after receipt of an Order (other than
     Orders submitted within the first [  *  ] after execution
     hereof) for OC-3 Capacity.

     PROVIDED, however, that Capacity to and from each Segment End Point may
     not be ordered by Grantee at any time prior to the dates set forth in
     Exhibit "A". Notwithstanding the foregoing, in no event shall Grantor be
     obligated (unless otherwise agreed in writing by Grantor which
     references this Section 7.6) to install more than [  *  ]  circuits or
     more than [  *  ] circuit along any Segment in any calendar month. Grantor
     shall under no circumstances be obligated to deliver Capacity, and the
     remedies set forth in Section 16.4 shall not apply to, either (a) any
     Capacity which is ordered after Grantee has satisfied the Committed
     Capacity requirement set forth in Section 7.7 below, other than an order
     pursuant to the provisions of Section 7.8 for a swap of Capacity where
     the new Capacity ordered will replace Capacity which was originally
     ordered as part of the Committed Capacity or previously swapped for
     Capacity which was part of the Committed Capacity, or (b) any Capacity
     ordered for a city pair where Grantee has previously ordered [  *  ] or
     more DS-3's (or the equivalent thereof). Grantee's sole remedy for default
     in the performance of this Section is set forth in Section 16.4. In the
     event that a Force Majeure Event (as defined in Article 15) prevents
     Grantor from satisfying the requirements of this Section, then,
     notwithstanding Article 15, Grantee shall be entitled to the remedies set
     forth in Section 16.4. A schedule of Grantee's currently forecasted
     Capacity orders is set forth as Exhibit "C". Although this forecast
     represents Grantee's present estimate of future needs, it is not binding
     and shall not affect the obligations of Grantor and Grantee under this
     Agreement under any circumstances.

7.7  Grantee hereby agrees that, in the first nine (9) months after execution
     of this Agreement, Grantee shall submit orders for Capacity between the
     Segment End Points listed on Exhibit "A" which equal or exceed
     [  *  ] (the "Committed Capacity"). Grantor's sole remedy for default in
     the performance of this Section is set forth in Section 16.5.


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                                       -7-


7.8  Grantee shall be permitted to swap Capacity which has been ordered
     between two Segment End Points for Capacity between two other Segment
     End Points. In the event that the total DS-0 Mileage for the new Capacity
     is equal to or less than the total DS-0 Mileage for the old Capacity, no
     additional Capacity Fee will be assessed. In the event that the total
     DS-0 Mileage for the new Capacity is greater than the total DS-0 Mileage
     for the old Capacity, an additional Capacity Fee shall be due and
     payable within five (5) days after the Acceptance Date for the new
     Capacity. Grantee shall in no event be entitled to a refund, rebate or
     reduction in the Capacity Fee as a result of a request to swap Capacity,
     but any Capacity lost by Grantee as a result of a swap may be used on a
     mile for mile basis on future Orders for Capacity. Delivery of the new
     Capacity shall be governed by the provisions hereof applicable to
     ordering and delivery of Capacity, except that no new Capacity Fee shall
     be payable on that portion of a future order attributable to swapped
     Capacity. Nonrecurring charges, as specified in Exhibit "F", shall be
     due and payable in the event Grantee requests to swap Capacity.
     Notwithstanding anything in this Section, Grantee shall not be permitted
     to request a swap of Capacity at any time during the first year after
     the Acceptance Date for such Capacity.

7.9  Grantee shall be permitted to delay the requested installation date for
     Capacity two (2) times with respect to any order, provided that (a) each
     such request shall be submitted in writing, (b) each such request must
     be received by Grantor no later than five (5) days prior to the
     then-scheduled installation date, and (c) Grantee shall be permitted to
     extend the date for installation by no more than thirty (30) days with
     respect to each request (so that installation for Capacity may be
     delayed by a maximum of sixty (60) days from the originally scheduled
     installation date.)


                                   ARTICLE 8
                       ACCEPTANCE TESTING AND COMPLETION

8.1  Grantor shall test the Capacity and the Ancillary Services relating
     thereto in accordance with generally acceptable industry standards
     ("Acceptance Testing"). Grantor shall provide Grantee with prior notice
     of the date and time of Acceptance Testing and Grantee shall have the
     right, but not the obligation, at Grantee's cost and expense, to
     participate in the end to end Acceptance Testing.

8.2  When Grantor has reasonably determined that the results of the
     Acceptance Testing with respect to a particular Segment show that the
     Capacity and the Ancillary Services relating thereto so tested is
     operating substantially in conformity with the applicable specifications
     required to meet the Acceptance Testing, Grantor shall provide written
     notice of same to Grantee (a "Completion Notice"). Grantee shall, within
     five (5) days of receipt of the Completion Notice, either accept or
     reject the Completion Notice (specifying, if rejected, the defect or
     failure in the Acceptance Testing and/or the items or matters to be
     remedied) by delivery of written notice to Grantor. In the event Grantee
     rejects the Completion Notice, Grantor shall promptly, and at no cost of
     Grantee, commence to remedy the defect or failure specified in Grantee's
     notice. Thereafter Grantor shall again give Grantee a Completion Notice
     with respect to such Segment. The foregoing procedure shall apply again
     and successively thereafter until Grantor has remedied all defects or
     failures specified by Grantee. However, the failure of Grantor to
     provide Capacity which is operating substantially in conformity with the
     applicable

                                       -8-


     requirements of the Acceptance Testing by the date which is the later of
     (i) within fifteen (15) days after Grantor's initial delivery of a
     Completion Notice; (ii) the date upon which the Capacity was due under
     Section 7.6; and (iii) the requested start date contained in Grantee's
     Order, shall constitute a failure of delivery and shall entitle Grantee
     to pursue the remedy set forth in Section 16.4 of this Agreement. Any
     failure by Grantee to timely reject a Completion Notice shall be deemed
     to constitute acceptance for purposes of this Agreement and Grantee
     shall be deemed to have delivered a notice of acceptance on the
     fifteenth day after delivery of the Completion Notice.

                                     ARTICLE 9
                                      ACCESS

Subject to payment of the fees and charges specified in Exhibit "F" and "G"
attached hereto, Grantor shall provide Grantee with access to, and Grantee
shall have the right to interconnect its communications system with, the
Capacity at the Segment End Points and, subject to the consent of Grantor, at
other technically feasible access points (the "Access Points"). Grantor shall
permit Grantee to connect with a local carrier at each Segment End Point,
provided that such local carrier is listed on Exhibit "D". Grantee shall have
the right (subject to availability of space in Grantor's facilities on a
non-discriminatory basis) to obtain colocation space from Grantor in each
Segment End Point for the purpose of interconnecting its communications
systems with the Capacity. The terms and conditions applicable to each such
colocation are specified in Exhibit "E" and the rates for each such
colocation are set forth in Exhibit "G". These rates, terms and conditions
shall be memorialized in individual Customer order forms for each requested
colocation space. In addition, Grantee shall have the right to lease
capacity on Grantor's entrance facilities at the Segment End Points at the
rates then being offered by Grantor to other customers with similar usage and
term commitment levels as Grantee requests.


                                     ARTICLE 10
                              MAINTENANCE AND REPAIR

10.1 Grantor shall use reasonable efforts to cause the Capacity which is
     leased or in which an IRU has been granted hereunder to be maintained in
     efficient working order and in accordance with industry standards.

10.2 Should any condition exist in any Capacity which is leased or in which an
     IRU has been granted hereunder that may impair the integrity of such
     Capacity, Grantor shall take reasonable actions to initiate or cause to
     be initiated maintenance on such Capacity which may include the
     deactivation of such Capacity. Grantor shall, to the extent reasonably
     practicable, advise Grantee in writing at least 30 days (or such shorter
     period as may be agreed) prior to the initiation of a planned maintenance
     operation of the timing and scope of such planned maintenance operation.

10.3 In the event of disruption of operation of the Capacity, Grantor shall
     use commercially reasonable efforts to cause service to be restored as
     quickly as reasonably possible, and Grantor shall take such measures as
     are reasonably necessary to obtain such objective.

                                       -9-



10.4   Grantor shall, in the performance of its obligations set forth in this
       Article 10, use the same level of efforts to maintain and restore the
       Capacity as Grantor employs in connection with the maintenance and
       restoration of Grantor's own service and facilities.

10.5   Grantor shall provide Ancillary Services in a commercially reasonable
       manner, and in accordance with industry standards.

10.6   If total outages for any given circuit (including outages attributable
       to maintenance or Force Majeure Events) exceed [  *  ] in any
       twelve (12) month period, Grantee shall have the right (exercisable
       within thirty (30) days after total outages exceed such level) to
       terminate delivery of the circuit and receive a refund of the unused
       portion of the Capacity Fee paid for such circuit as set forth in
       Section 16.3.


                                   ARTICLE 11
                                 USE OF CAPACITY

11.1   Grantee represents and warrants that it will use the Capacity and the
       IRU hereunder in compliance with all applicable government codes,
       ordinances, laws, rules and regulations.

11.2   Subject to the provisions of this Agreement, Grantee may use the
       Capacity and the IRU for any lawful purpose. Grantee acknowledges and
       agrees that it has no right to use any fibers included or incorporated
       in the Leased System or the Grantor System, and that Grantee shall keep
       any and all of the Leased System and the Grantor System free from any
       liens, rights or claims of any third party attributable to Grantee.

11.3   Notwithstanding anything to the contrary contained in this Agreement,
       Grantee covenants and agrees that Grantee shall not, that Grantee
       shall have no right to, and that Grantor may enjoin Grantee from any
       attempt to, assign, sell, lease, sublease, transfer, or convey the IRU
       granted hereunder with respect to any Segment. Grantee may sell
       services using the Capacity or lease portions of the Capacity to third
       parties without restriction. By way of example regarding the
       foregoing, Grantee would be prohibited from transferring any Segment
       to a third party on an IRU basis but would have the unrestricted right
       to lease all or a portion of the Capacity to third parties. No such
       sale or lease shall, however, eliminate or affect either party's
       obligations under this Agreement.

11.4   Grantee shall not use the Capacity in a way which physically
       interferes in any way with or otherwise adversely affects the use of
       the fibers, cable or conduit of any other Person using the Leased
       System, the Grantor System or capacity therein.

11.5   Grantee and Grantor agree to cooperate with and support each other in
       complying with any requirements applicable to their respective rights
       and obligations hereunder by any governmental authority, so long as
       (i) such cooperation does not materially increase a party's costs or
       efforts in connection with the performance of this Agreement and
       (ii) the party requesting such support or cooperation shall reimburse
       the other party for all costs and expenses incurred in connection
       therewith.


* Confidential treatment has been requested for a portion of this Exhibit


                                    -10-


                                   ARTICLE 12
                                INDEMNIFICATION

12.1   Subject to the provisions of Article 13, Grantor hereby agrees to
       indemnify, defend, protect and hold harmless Grantee and its
       employees, officers and directors, from and against, and assumes
       liability for: (i) any injury, loss or damage to any Person, tangible
       property of facilities of any Person (including reasonable attorney
       fees and costs) to the extent arising out of or resulting from the
       negligence or willful misconduct of Grantor, its officers, employees,
       servants, affiliates, agents, contractors, licensees, invitees and
       vendors arising out of or in connection with the performance by
       Grantor of its obligations under this Agreement; and (ii) any claims,
       liabilities or damages arising out of any violation by Grantor of any
       regulation, rule, statute or court order of any governmental authority
       in connection with the performance by Grantor of its obligations under
       this Agreement.

12.2   Subject to the provisions of Article 13, Grantee hereby agrees to
       indemnify, defend, protect and hold harmless Grantor, and its
       employees, officers and directors, from and against, and assumes
       liability for: (i) any injury, loss or damage to any Person, tangible
       property or facilities of any Person (including reasonable attorney
       fees and costs) to the extent arising out of or resulting from the
       negligence or willful misconduct of Grantee, its officers, employees,
       servants, affiliates, agents, contractors, licensees, invitees and
       vendors arising out of or in connection with the exercise by Grantee
       of its rights under this Agreement; and (ii) any claims, liabilities
       or damages arising out of any violation by Grantee of any regulation,
       rule, statute or court order of any governmental authority in connection
       with the exercise by Grantee of its rights under this Agreement.

12.3   Grantor and Grantee agree to promptly provide each other with notice
       of any claim which may result in an indemnification obligation
       hereunder. The indemnifying party 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 indemnified party,
       which consent shall not be unreasonably withheld or delayed.

12.4   Grantor and Grantee each expressly recognize and agree that its
       obligation to indemnify, defend, protect and save the other harmless
       is not a material obligation to the continuing performance of its other
       obligations, if any, hereunder. In the event that a party shall fail
       for any reason to so indemnify, defend, protect and save the other
       harmless, the injured party hereby expressly recognizes that its sole
       remedy in such event shall be the right to bring legal proceedings
       against the other party for its damages as a result of the other
       party's said failure to indemnify, defend, protect and save harmless.
       These obligations shall survive the expiration or termination of this
       Agreement.


                                   ARTICLE 13
                             LIMITATION OF LIABILITY

Notwithstanding any provision in any other Article of this Agreement to the
contrary and except to the extent caused by the willful misconduct of a
party, neither party shall be liable to the other party for any special,
incidental, indirect, punitive or consequential damages, whether

                                      -11-


foreseeable or not, arising out of, or in connection with such party's
failure to perform its respective obligations hereunder, including, but not
limited to, loss of profits or revenue (whether arising out of transmission
interruptions or problems, any interruption or degradation of service or
otherwise), or claims of customers, whether occasioned by any construction,
reconstruction, relocation, repair or maintenance performed by, or failed to
be performed by, the other party or any other cause whatsoever, including
breach of contract, breach of warranty, negligence, or strict liability, all
claims for which damages are hereby specifically waived.  This Article shall
not eliminate the right of the parties to pursue and obtain the relief
specified in Sections 16.4 and 16.5.  Nothing contained herein shall operate
as a limitation on the right of either party hereto to bring an action for
damages against any third party, including claims for indirect, special or
consequential damages, based on any acts or omissions of such third party.


                                   ARTICLE 14
                                   INSURANCE

14.1   During the term of this Agreement, each party shall obtain and
       maintain, and shall require any of its permitted subcontractors to
       obtain and maintain, the following insurance, naming the other party as
       an additional insured: (i) not less than $5,000,000.00 combined single
       limit liability insurance, on an occurrence basis, for personal injury
       and property damage, including injury or damage arising from the
       operation of vehicles or equipment and liability for completed
       operations; (ii) worker's compensation insurance in amounts required by
       applicable law and employer's liability insurance with a limit of at
       least $1,000,000.00 per occurrence; and (iii) automobile liability
       insurance covering death or injury to any person or persons, or damage
       to property arising from the operation of vehicles or equipment, with
       limits of not less than $1,000,000.00 per occurrence.

14.2   Both parties expressly acknowledge that a party shall be deemed to be
       in compliance with the provisions of this Article if it maintains an
       approved self-insurance program providing for a retention of up to
       $1,000,000.00.  If either party provides any of the foregoing coverages
       on a claims made basis, such policy or policies shall be for at least a
       three (3) year extended reporting or discovery period.

14.3   Unless otherwise agreed, all insurance policies shall be obtained and
       maintained with companies rated A or better by Best's Key Rating Guide
       and each party shall, upon request, provide the other party with an
       insurance certificate confirming compliance with the requirements of
       this Article.

14.4   Grantee and Grantor shall each obtain from the insurance companies
       providing the coverages required by this Agreement, the permission of
       such insurers to allow such party to waive all rights of subrogation
       and such party does hereby waive all rights of said insurance companies
       to subrogation against the other party, its affiliates, subsidiaries,
       assignees, officers, directors and employees.

14.5   In the event either party fails to maintain the required insurance
       coverages and a claim is made or suffered, such party shall indemnify
       and hold harmless the other party from any and all claims for which the
       required insurance would have provided coverage.



                                      -12-



                                  ARTICLE 15
                                FORCE MAJEURE

Except with respect to (a) Grantee's obligations to pay the Capacity Fee and
the Operations and Maintenance Fee, and (b) the rights and obligations of
Grantor and Grantee under Sections 10.6 and 16.4, neither party shall be in
default under this Agreement if and to the extent that any failure or delay
in such party's performance of one or more of its obligations hereunder is
caused by any of the following conditions, and such party's performance of
such obligation or obligations shall be excused and extended for and during
the period of any such delay: act of God; fire; flood; fiber or cable cuts;
government codes, ordinances, laws, rules, regulations or restrictions; war
or civil disorder; or any other cause beyond the reasonable control of such
party (each a "Force Majeure Event"). The party claiming relief under this
Article shall notify the other in writing of the existence of the event
relied on and the cessation or termination of said event, and shall use its
best efforts to avoid or minimize the delay caused by the Force Majeure Event.

                                  ARTICLE 15
                                    DEFAULT

16.1      If (i) Grantee makes a general assignment for the benefit of its
          creditors, files a voluntary petition in bankruptcy or any
          petition or answer seeking, consenting to, or acquiescing in
          reorganization, arrangement, adjustment, composition, liquidation,
          dissolution or similar relief; (ii) an involuntary petition in
          bankruptcy, other insolvency protection against Grantee as filed
          and not dismissed with 120 days; (iii) Grantee fails to pay the
          Capacity Fee on a timely basis and such failure continues for a
          period of twenty (20) days after written notice thereof; or (iv)
          Grantee fails to observe and perform any other term or provision of
          this Agreement and such failure continues for a period of thirty
          (30) days after written notice from Grantor (or if such failure is
          not susceptible of a cure within such thirty (30) day period, cure
          has not been commenced and diligently pursued thereafter to
          completion), then Grantor may (A) terminate this Agreement or the
          Term with respect to any Capacity, in whole or in part, in which
          event Grantor shall have no further duties or obligations
          hereunder, and (B) subject to Article 13, pursue any legal remedies
          it may have under applicable law or principles of equity relating
          to such default, including an action for damages, payment of the
          unpaid Capacity Fee or Operations and Maintenance Fee, specific
          performance and/or injunctive relief.

16.2      If (i) Grantor makes a general assignment for the benefit of its
          creditors, files a voluntary petition in bankruptcy or any petition
          or answer seeking, consenting to, or acquiescing in reorganization,
          arrangement, adjustment, composition, liquidation, dissolution or
          similar relief; (ii) an involuntary petition in bankruptcy, other
          insolvency protection against Grantor as filed and not dismissed
          with 120 days; (iii) Grantor fails to observe and perform the terms
          and provisions of this Agreement and such failure continues for a
          period of thirty (30) days after written notice from Grantee (or to
          such failure as not susceptible of a cure within such thirty (30)
          day period, cure has not been commenced and diligently pursued
          thereafter to completion), then Grantee may, subject to Section
          16.3 below, (A) terminate this Agreement and the Term, in whole or
          in part, in which event Grantee shall have no further duties or
          obligations hereunder, and (B) subject to Article 13, pursue any
          legal remedies it may have under applicable law or principles of


                                     -13-



          equity relating to such default, including an action for damages,
          specific performance and/or injunctive relief.

16.3      Except with respect to a failure to make Capacity available within
          the time set forth in Article 7 and Section 8.2 (the remedy for
          which is set forth in Section 16.4 below), Grantee's sole and
          exclusive remedy with respect to each Segment for any failure of
          Grantor to delivery the Capacity within such Segment in accordance
          with this Agreement shall be to terminate the Term of such Segment,
          in which event Grantor shall refund a prorated portion of the
          Capacity Fee for the remaining unused balance of the Term with
          respect to such Segment, together with interest thereon at the
          Prime Rate plus [  *  ] from the date payment was made to
          Grantor until the date of the refund.

16.4      In the event that Grantor fails to make Capacity available within
          the time(s) set forth in Section 7.6, Grantee shall provide
          Grantor with written notice of such failure and Grantor shall have
          a period of fifteen (15) days after receipt of such written notice
          within which to cure such failure (either by providing the Capacity
          (in working order and having passed Acceptance Testing) via the
          Leased System or the Grantor System, or through "off-net"
          arrangements). If Grantor fails to make the Capacity available
          within such fifteen (15) day period, or if Grantor fails to provide
          working capacity within the time(s) required by Section 8.2
          ("Non-Delivered Capacity), Grantee may elect to acquire replacement
          services for such Non-Delivered Capacity of equal or lesser
          capacity and receive a credit off of the Capacity Fee equal to
          the sum of (a) all reasonable nonrecurring charges (including
          reasonable order expedite charges) incurred by Grantee in
          connection with such replacement services and (b) the extent to
          which the total monthly recurring charges incurred by Grantee for
          such replacement services through the date which is sixty (60) days
          after Grantor makes the Non-delivered Capacity available to Grantee
          in working order and having passed Acceptance Testing) exceeds
          [*] per DS-0 mile.

          Grantee shall obtain replacement services on a month-to-month
          basis, shall use its best efforts to obtain a minimum of three (3)
          price quotations for the delivery of such replacement services
          from reputable suppliers, and shall provide copies of such
          quotations to Grantor (unless prohibited by nondisclosure
          agreements, in which event Grantee shall provide as much
          information to Grantor as possible without violating such
          nondisclosure agreements). Upon receipt of such quotations, Grantor
          shall have the right to select the carrier which shall deliver
          replacement services to Grantee; provided, however, if Grantor
          fails to make such selection by written notice to Grantee by
          facsimile within one (1) business day of Grantor's receipt of the
          quotations, Grantee shall have the right to make such selection. In
          the event that Grantee is prohibited from disclosing quotations to
          Grantor as a result of nondisclosure agreements and Grantee is
          unable, after making efforts to do so, to obtain the consent of the
          supplier to disclose the quotation to Grantor, then Grantee may
          make such selection itself (provided that Grantee shall be
          obligated to select such replacement carrier on a commercially
          reasonable basis). Any credit due under the foregoing shall be
          applied to sums due from Grantee hereunder for a period of six (6)
          months after Grantee incurs such expense. In the event that the
          aggregate credits are not fully used within such time, Grantor
          shall pay the remaining balance of the credit to Grantee in cash.
          The total credit to which Grantee shall be entitled under this
          Section shall in no event be greater than the total Capacity Fee
          for the Non-Delivered Capacity (provided that, if the total credit
          amount exceeds the cap set

          * Confidential treatment has been requested for a portion of this
            Exhibit


                                     -14-



          forth in this sentence, Grantee shall not thereafter be obligated to
          accept the Non-Delivered Capacity from Grantor when and if grantor
          makes such Capacity available). In the event that Grantee receives
          a credit under this Section as a result of a failure of Grantor to
          deliver requested Capacity, and Grantor subsequently delivers such
          Capacity to Grantee, then the Term of Grantee's use of the Capacity
          shall be deemed to have commenced on the date that Grantee first
          received the replacement services purchased by it.

16.5      In the event that Grantee fails to satisfy the Committed Capacity
          requirement set forth in Section 7.7, Grantor shall provide Grantee
          with written notice of such failure and Grantee shall have a
          period of thirty (30) days after receipt of such notice to submit
          orders so that the aggregate amount of Capacity ordered is equal to
          or exceeds the Committed Capacity. In the event that Grantee fails
          to do so, then, commencing on the date which is thirty (30) days
          after receipt of the written notice and on a monthly basis
          thereafter, Grantee shall be liable to pay to Grantor an additional
          charge (the "Shortfall Fee") (in addition to the amount payable by
          Grantee for Capacity which is actually delivered hereunder) equal
          to the difference between the Capacity Fee payable by Grantee for
          Capacity which is then being delivered to Grantee and the amount of
          the Capacity Fee (including any Initial Payments) that Grantee
          would have been required to pay had Grantee satisfied the Committed
          Capacity requirement and such level of Capacity had been provided
          to Grantee hereunder. The portion of the Shortfall Fee which
          represents the Initial Payment for unordered Capacity shall be
          credited to the Initial Payment that would otherwise be due on
          Orders for Capacity submitted by Grantee.

          By way of example concerning the Shortfall Fee, assume that Grantee
          fails to place any orders during the first nine (9) months of the
          Term and that Grantor provided Grantee with written notice of such
          failure. In this example, assuming further that Grantee fails to
          submit any Orders within thirty (30) days after receipt of such
          notice, on the thirty-first (31st) day after receipt of such
          notice, Grantee would be required to pay Grantor the sum of
          [*] (representing the total of all Initial Payments that Grantee would
          have been required to pay had Grantee satisfied the Committed Capacity
          requirement and such level of Capacity had been provided to Grantee
          hereunder) and Grantee would also be required to commence payment of
          the monthly installments for the balance of the Capacity Fee.

                                  ARTICLE 17
                                  ASSIGNMENT

17.1      Neither party shall assign, encumber or otherwise transfer this
          Agreement to any other Person without the prior written consent of
          the other party, which consent shall not be unreasonably withheld;
          provided, each party shall have the right, without the other
          party's consent, but with prior written notice to the other party,
          to assign or otherwise transfer this Agreement (i) as collateral to
          any institutional lender of such party subject to the prior rights
          and obligations of the parties hereunder; and (ii) to any Affiliate
          of such party, or to any entity into which such party may be
          merged or consolidated or which purchases all or substantially all
          of the assets of such party; provided that such party shall not be
          released from its obligations hereunder. Any assignee or transferee
          shall continue to be subject to all of the provisions of this
          Agreement, (except that any lender referred to in clause (i) above
          shall not incur any obligations under this Agreement nor shall it
          be

          * Confidential treatment has been requested for a portion of this
            Exhibit


                                     -15-



restricted from exercising any right of enforcement of foreclosure with
respect to any related security interest or lien, so long as the purchaser in
foreclosure is subject to the provisions of this Agreement).

17.2   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
       permitted successors and assigns.

                                   ARTICLE 18
                         REPRESENTATIONS AND WARRANTIES

18.1   Each party represents and warrants that: (i) it has the full right and
       authority to enter into, execute, deliver and perform its obligations
       under this Agreement; (ii) it has taken all requisite corporate action
       to approve the execution, delivery and performance of this Agreement;
       (iii) this Agreement constitutes a legal, valid and binding obligation
       enforceable against such party in accordance with its terms, subject to
       bankruptcy, insolvency, creditors' rights and general equitable
       principles; and (iv) 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.

18.2   EXCEPT AS SET FORTH IN THE FOREGOING SECTION OR IN ARTICLE 10, GRANTOR
       MAKES NO WARRANTY, EXPRESS OR IMPLIED, WITH RESPECT TO THE CAPACITY,
       INCLUDING ANY WARRANTY OR MERCHANTABILITY OR FITNESS FOR PARTICULAR
       PURPOSE, AND ALL SUCH WARRANTIES ARE HEREBY EXPRESSLY DISCLAIMED.

                                   ARTICLE 19
                                CONFIDENTIALITY

19.1   Grantor and Grantee hereby agree that if either party provides
       confidential or proprietary information to the other party
       ("Proprietary Information"), such Proprietary Information shall
       be held in confidence, and the receiving party shall afford such
       Proprietary Information the same care and protection as it affords
       generally to its own confidential and proprietary information
       (which in any case shall be not less than reasonable care) in order to
       avoid disclosure to or unauthorized use by any third party. The parties
       acknowledge and agree that all information disclosed by either party to
       the other in connection with or pursuant to this Agreement shall be
       deemed to be Proprietary Information, provided that written information
       is clearly marked in a conspicuous place as being confidential or
       proprietary and verbal information is indicated as being confidential or
       proprietary when given and promptly confirmed in writing as such
       thereafter. All Proprietary Information, unless otherwise specified in
       writing, shall remain the property of the disclosing party, shall be
       used by the receiving party only for the intended purpose, and such
       written Proprietary 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. Proprietary Information shall not be reproduced except
       to the extent necessary to accomplish the purpose and intent of this
       Agreement, or as otherwise may be permitted in writing by the
       disclosing party.


                                     -16-



19.2   Section 19.1 shall not apply to any Proprietary Information which (i)
       becomes publicly available other than through the disclosing party;
       (ii) is required to be disclosed by a governmental or judicial law,
       order, rule or regulation; (iii) is independently developed by the
       receiving party; or (iv) becomes available to the receiving party
       without restriction from a third party.

19.3   Notwithstanding Sections 19.1 and 19.2 either party may disclose
       Proprietary Information to its employees, agents, and legal and
       financial advisors and providers to the extent necessary or
       appropriate in connection with the negotiation and/or performance of
       this Agreement or in obtaining financing, provided that each such
       party is notified of the confidential and proprietary nature of such
       Proprietary Information and is subject to or agrees to be bound by
       similar restrictions on its use and disclosure.

19.4   Neither party shall issue any public announcement or press
       release relating to the execution of this Agreement without the prior
       approval of the other party.

19.5   In the event either party shall be required to disclose all or
       any part of this Agreement in, or attach all or any part of this
       Agreement in, any regulatory filing or statement, each party agrees to
       discuss and work cooperatively, in good faith, with the other party,
       to protect, to the extent possible, those items or matters which the
       other party deems confidential and which may, in accordance
       with applicable laws, be deleted therefrom.

19.6   The provisions of this Article shall survive expiration or termination
       of this Agreement.

                                   ARTICLE 20
                               DISPUTE RESOLUTION

If the parties are unable to resolve any dispute arising under or relating to
this Agreement, the parties shall resolve such disagreement or dispute as
follows:

       (a)  Either party may refer the matter to the appropriate managers of
            the parties by written notice to the other party (the "Dispute
            Notice").  Within fifteen (15) days after delivery of the Dispute
            Notice such managers of both parties will use good faith efforts
            to schedule a meeting at a mutually acceptable time and place to
            attempt to resolve the dispute.

       (b)  If the matter has not been resolved within thirty (30) days after
            delivery of the Dispute Notice, or if such officers fail to meet
            within fifteen (15) days after delivery of such Dispute Notice,
            either party may initiate mediation in accordance with the
            procedures set forth in (c) below.  All negotiations conducted by
            such officers shall be confidential and shall be treated as
            compromise and settlement negotiations for purposes of federal
            and state rules of evidence.

       (c)  If such officers are unable to resolve the dispute or have failed
            to meet, the parties may elect to participate in a nonbinding
            mediation procedure as follows:


                                     -17-



            (i)   A mediator will be selected by having counsel for each party
                  agree on a single person to act as mediator.  The parties'
                  counsel as well as up to three (3) representatives of each of
                  the parties will appear before the mediator at a time and
                  place determined by the mediator, but not more than sixty
                  (60) days after delivery of the Dispute Notice.  The fees of
                  the mediator and other costs of the mediation will be shared
                  equally by the parties.

            (ii)  Each party will present a review of the matter and its
                  position with respect to such matter.  At the conclusion of
                  both presentations the parties may ask questions of each
                  other.  Either party may abandon the mediation procedure at
                  the end of the presentation and question periods and the
                  mediation procedure shall not be binding on either party.

       (d)  If the matter is not resolved after applying the mediation
            procedure set forth above, or if either party refuses to take
            part in the mediation process, either party may initiate legal
            proceedings to resolve their dispute.  Any such legal proceedings
            shall take place in Denver, Colorado.

                                   ARTICLE 21
                                     NOTICES

All notices or other communications which are required or permitted herein
shall be in writing and sufficient if delivered personally, sent by prepaid
overnight air courier, or sent by registered or certified mail, postage
prepaid, return receipt requested, addressed as follows:

IF TO GRANTOR     (prior to July 1, 1999):

                  LEVEL 3 COMMUNICATIONS, LLC
                  1450 Infinite Drive
                  Louisville, Colorado  80027
                  Attn: General Counsel

                  (after July 1, 1999):

                  LEVEL 3 COMMUNICATIONS, LLC
                  1025 Eldorado Drive
                  Broomfield, Colorado  80021
                  Attn: General Counsel

IF TO GRANTEE:    WORLDxCHANGE COMMUNICATIONS
                  9999 Willow Creek Road
                  San Diego, CA  92131
                  Attn: Legal Department


                                     -18-



or at such other address as the party to whom notice is to be given may have
furnished to the other party in writing in accordance herewith.  Any such
communication shall be deemed to have been given when delivered if delivered
personally, on the business day after dispatch if sent by overnight air
courier, or on the third business day after posting if sent by mail.

                                   ARTICLE 22
                         ENTIRE AGREEMENT; AMENDMENT

This Agreement constitutes the entire and final agreement and understanding
between the parties 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 hereby made a part of this Agreement.  This Agreement may only
be modified or supplemented by an instrument in writing executed by a duly
authorized representative of each party.

                                   ARTICLE 23
                           RELATIONSHIP OF THE PARTIES

The relationship between Grantee and Grantor 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 but not limited to federal income
tax purposes.

                                   ARTICLE 24
                                  COUNTERPARTS

This Agreement may be executed in one or more counterparts, all of which
taken together shall constitute one and the same instrument.


                                     -19-



                                  ARTICLE  25
                               ANCILLARY SERVICES


Grantor shall, at the request of Grantee, provide the ancillary services set
forth in Exhibit "F" (the "Ancillary Services"). Except as noted on Exhibit "A",
Grantor shall deliver Ancillary Services which are requested on the same Order
form as an Order for Capacity within the time frames set forth in Section 7.6 of
this Agreement. Grantor shall use its reasonable efforts to deliver Ancillary
Services which are requested separate from an Order for Capacity within
commercially reasonable times. The charges for Ancillary Services are set forth
in Exhibit "F", shall be fixed for the Term of the Agreement and shall be
payable by Grantee on a monthly basis.

IN WITNESS WHEREOF, Grantor and Grantee have executed this Agreement as of the
date first above written.

LEVEL 3 COMMUNICATIONS, LLC, a
Delaware limited liability company

By: /s/ [ILLEGIBLE]
    ----------------------------------------
Title: Vice President
      --------------------------------------

COMMUNICATION TELESYSTEMS INTERNATIONAL,
a California corporation

By: /s/ [ILLEGIBLE]
    ----------------------------------------
Title:  CEO
      --------------------------------------

                                                  [STAMP]


                                     -20-



                                  EXHIBIT "A"
                     SEGMENT ENDPOINTS AND IN-SERVICE DATES



          City                                       In-Service Date
          ---------------------------------------------------------------
                                                  
          New York, New York                         [  *  ]

          Washington, D.C.                           [  *  ]

          Philadelphia, Pennsylvania                 [  *  ]

          Boston, Massachusetts                      [  *  ]

          Atlanta, Georgia                           [  *  ]

          Detroit, Michigan                          [  *  ]

          Chicago, Illinois                          [  *  ]

          Houston, Texas                             [  *  ]

          Dallas, Texas                              [  *  ]

          Denver, Colorado                           [  *  ]

          San Diego, California                      [  *  ]

          Los Angeles, California                    [  *  ]

          San Jose, California                       [  *  ]

          San Francisco, California                  [  *  ]

          Seattle, Washington                        [  *  ]

          Las Vegas, Nevada                          [  *  ]

          St. Louis, Missouri                        [  *  ]

          Salt Lake City, Utah                       [  *  ]

          Phoenix, Arizona                           [  *  ]

          Baltimore, Maryland                        [  *  ]

          Cincinnati, Ohio                           [  *  ]



* Confidential treatment has been requested for a portion of this Exhibit


                                     -21-



                                                  
          Miami, Florida                             [  *  ]

          Newark, New Jersey                         [  *  ]

          Orlando, Florida                           [  *  ]

          Stamford, Connecticut                      [  *  ]

          Tampa, Florida                             [  *  ]


*  Confidential treatment has been requested for a portion of this Exhibit
** With respect to Las Vegas, Salt Lake City and Phoenix only, until such time
   as Grantor's gateway facility is completed, Grantor shall have an extra
   thirty (30) days to deliver M 1/3 multiplexing.

                                     -22-



                                  EXHIBIT "B"
                  CAPACITY FEE, OPERATIONS AND MAINTENANCE FEE

A.  THE CAPACITY FEE.
[*]

B.  THE OPERATIONS AND MAINTENANCE FEE.
[*]

C.  CALCULATION  OF FEES.

The Capacity Fee and the Operations and Maintenance Fee shall be calculated
based on "V&H" miles between Grantor's gateway facilities. [*]


*Confidential treatment has been requested for a portion of this Exhibit


                                     -23-



                                  EXHIBIT "C"
                          GRANTEE'S CAPACITY FORECAST



City Pair                                          Quantity of DS-3's
- -----------                                      -----------------------
                                              
New York - Los Angeles                                         [  *  ]

Dallas - Los Angeles                                           [  *  ]

Dallas - Chicago                                               [  *  ]

Chicago - New York                                             [  *  ]

Chicago - Los Angeles                                          [  *  ]

Los Angeles - Las Vegas                                        [  *  ]

Los Angeles - Phoenix                                          [  *  ]

San Francisco - Portland                                       [  *  ]

New York - Atlanta                                             [  *  ]

New York - Miami                                               [  *  ]



*Confidential treatment has been requested for a portion of this Exhibit


                                     -24-



                                  EXHIBIT "D"
                                QUALIFIED LECs


                                                     
New York, New York                                      Bell, WorldCom

Washington, D.C.                                        Bell, WorldCom

Philadelphia, Pennsylvania                              Bell, WorldCom

Boston, Massachusetts                                   Bell, WorldCom

Atlanta, Georgia                                        Bell, WorldCom

Detroit, Michigan                                       Bell, WorldCom

Chicago, Illinois                                       Bell, WorldCom

Houston, Texas                                          Bell, WorldCom

Dallas, Texas                                           Bell, WorldCom

Denver, Colorado                                        Bell, WorldCom

San Diego, California                                   Bell, WorldCom

Los Angeles, California                                 Bell, WorldCom

San Jose, California                                    Bell, WorldCom

San Francisco, California                               Bell, WorldCom

Seattle, Washington                                     Bell, WorldCom

Las Vegas, Nevada                                       Bell, WorldCom

St. Louis, Missouri                                     Bell, WorldCom

Salt Lake City, Utah                                    Bell, WorldCom

Phoenix, Arizona                                        Bell, WorldCom


This List may be amended by mutual agreement of Grantor and Grantee as new local
exchange carriers are added to those available in the Gateways and POP's above
and as new Gateways and POP's are added to the list along with their serving
local exchange carriers


                                     -25-



                                  EXHIBIT "E"
                        COLOCATION TERMS AND CONDITIONS




                                     -26-



                              TERMS AND CONDITIONS
                              TELEPHONY COLOCATION

The following Terms and Conditions shall be applicable to Customer's use of
space within Level 3 facilities used for the purpose of colocating
telecommunications equipment (the "Space") ordered by Customer under any
Customer Order.

1.  Upon execution and performance of Customer's obligations under a Customer
Order for use of Space, Customer shall be granted the right to occupy the Space
identified therein. Customer may submit multiple Customer Orders requesting use
of different Space, each of which shall be governed by the terms hereof.

2.  Customer shall be permitted to use the Space only for: (a) placement and
maintenance of communications equipment which shall be interconnected to the
network services offered by Level 3, or (b) to cross connect to the facilities
of other communications carriers. The nonrecurring and monthly recurring charges
for the Space and any Services ordered by Customer shall be set forth in each
Customer Order.

4.  Level 3 shall perform such janitorial services, environmental systems
maintenance, power plant maintenance and other actions as are reasonably
required to maintain the facility in which the Space is located in good
condition which is suitable for the placement of communications equipment.
Customer shall maintain the Space in orderly and safe condition, and shall
return the Space to Level 3 at the conclusion of the term set forth in the
Customer Order in the same condition (reasonable wear and tear excepted) as when
such Space was delivered to Customer. EXCEPT AS EXPRESSLY STATED HEREIN OR IN
ANY CUSTOMER ORDER, THE SPACE SHALL BE DELIVERED AND ACCEPTED "AS IS" BY
CUSTOMER, AND NO REPRESENTATION HAS BEEN MADE BY LEVEL 3 AS TO THE FITNESS OF
THE SPACE FOR CUSTOMER'S INTENDED PURPOSE.

5.  The term of use of the Space shall begin on the later to occur of the date
requested by Customer or the date that Level 3 completes the build-out of the
Space. Customer's use of the Space shall continue for the term of the Capacity
Lease and IRU Agreement, subject to cancellation by Customer upon not less than
120 days prior notice.

6.  Level 3 shall use reasonable efforts to complete the build-out and make the
Space available to Customer on or before the date requested by the Customer. In
the event that Level 3 fails to complete the build-out within sixty (60) days of
the date requested by Customer, then Customer may terminate its rights to use
such Space and receive a refund of any fees paid for the use or build-out of
such Space.

7.  Customer shall abide by any posted or otherwise communicated reasonable
rules relating to use of, access to, or security measures respecting the
Space. In the event that unauthorized parties gain access to the Space
through access cards, keys or other access devices provided to Customer,
Customer shall be responsible for any damages incurred as a result thereof.
Customer shall be responsible for the cost of replacing any security devices
lost or stolen after delivery thereof to Customer. In addition, Level 3 shall
have the right to terminate Customer's use of the Space in the event that:
(a) Level 3's rights to use the facility within which the Space is located
terminates or expires for any reason; (b) Customer has violated the terms
hereof and (if such violation is susceptible of cure) has failed to cure such
violation within twenty (20) days after written notice thereof; (c) Customer
makes any material alterations to the Space without first obtaining the
written consent of Level 3 (which consent shall not be unreasonably
withheld); (d) Customer allows personnel or contractors to enter the Space
who have not been approved by Level 3 in advance; or (e) Customer violates
any posted or otherwise communicated rules relating to use of or access to
the Space and (if such violation is susceptible of cure) has failed to cure
such violation within twenty (20) days after written notice thereof. Level 3
shall use reasonable efforts to notify Customer of any events that may result
in termination of the use of the Space.

8.  Customer shall pay all monthly recurring fees, cross-connect fees, power
charges and nonrecurring fees specified in each Customer Order for the agreed
term thereof. In the event that Customer terminates a Customer Order for Space
or in the event that the Customer Order is terminated due to a failure of
Customer to satisfy the requirements set forth herein or in the Customer Order
prior to the end of the agreed term, Customer shall pay a termination charge
equal to the costs incurred by Level 3 in returning the Space to a condition
suitable for use by other parties, plus the percentage of the monthly recurring
fees for the terminated Space calculated as follows:

A.  100% of the monthly recurring fees that would have been charged for the
Space for months 1-12 of the agreed term; plus


                                  Page 1 of 2



B.  75% of the monthly recurring fees that would have been charged for the
Space for months 13-24 of the agreed term; plus

C.  50% of the monthly recurring fees that would have been charged for the Space
for months 25 through the end of the agreed term.

9.  Level 3 reserves the right to change the location or configuration of the
Space, provided, however, that Level 3 shall not arbitrarily or discriminatorily
require such changes. Level 3 and Customer shall work in good faith to minimize
any disruption in Customer's services that may be caused by such changes in
location or configuration of the Space.

10.  Prior to occupancy and during the term of use of any Space, Customer
shall procure and maintain the following minimum insurance coverage: (a)
Workers' Compensation in compliance with all applicable statutes of
appropriate jurisdiction. Employer's Liability with limits of $500,000 each
accident; (b) Commercial General Liability with combined single limits of
$1,000,000 each occurrence; and (c) "All Risk" Property insurance covering
all of Customers personal property located in the Space. Customer's
Commercial General Liability policy shall be endorsed to show Level 3 (and
any underlying property owner, as requested by Level 3) as an additional
insured. All policies shall provide that Customer's insurers waive all rights
of subrogation against Level 3. Customer shall furnish Level 3 with
certificates of insurance demonstrating that Customer has obtained the
required insurance coverages prior to occupancy of the Space. Such
certificates shall contain a statement that the insurance coverage shall not
be materially changed or cancelled without at least thirty (30) days' prior
written notice to Level 3. Customer shall require any contractor entering the
Space on its behalf to procure and maintain the same types, amounts and
coverage extensions as required of Customer above.

11.  The liability of Level 3 for damages arising out of the furnishing of
Space, including but not limited to mistakes, omissions, interruptions, delays,
tortious conduct or errors, or other defects arising out of the failure to
furnish Space, whether caused by acts of commission or omission, shall be
limited to a prorated refund of the charges paid by Customer for the use of the
Space hereunder. The extension of such refunds shall be the sole remedy of
Customer and the sole liability of Level 3. However this provision shall not
limit the liability of Level 3 for willful misconduct.


                                  Page 2 of 2



                                  EXHIBIT "F"
                               ANCILLARY CHARGES

Charges and Rates set forth in this Exhibit "F" shall remain effective for the
Term of the Agreement.

A.  NONRECURRING CHARGES FOR RECONFIGURATIONS AND SWAPS.

[*]
[*]

B.  OTHER ANCILLARY SERVICES AND CHARGES.

Echo Cancellers            [*]

M1/3 Multiplexing          [*]

DS-3 Cross Connects


                                                             
1.  Level 3 DS-1 IXC to DS-1 Local Access                       [*]
    Bypass or Colocate

2.  Level 3 DSX Cross Connect Panel                             [*]
    Bypass or Colocate

3.  Non Level 3 DS-1 Facilities to                              [*]
    Non Level 3 DS-1 Facilities

4.  Level 3 DS-3 IXC to DS-3 Local                              [*]
    Access Bypass or Colocate

5.  Non Level 3 DS-3 Facilities to                              [*]
    Non Level 3 DS-3 Facilities


** Grantee must accept and pay for such services for a minimum term of one year
from date of installation.

C.  CANCELLATION CHARGES

[*]

[*]

*Confidential treatment has been requested for a portion of this Exhibit


                                     -27-



                                  EXHIBIT "G"
                              COLOCATION CHARGES

Charges and Rates set forth in this Exhibit "G" shall remain effective for a
minimum period of five (5) years from the date of execution of the Agreement.
Thereafter, Grantor may, on a non-discriminatory basis, adjust such charges
upon thirty (30) days advance written notice to Grantee; provided that such
charges shall not exceed those then being charged by Grantor to other similarly
situated customers for equivalent services.



Enclosed Cabinet:     Nonrecurring Installation Charge     Monthly Recurring Charge
                                                     
     1 Year Term      [*]                                  [*]
     2 Year Term      [*]                                  [*]
     3 Year Term      [*]                                  [*]




AC and DC Power:      Nonrecurring Installation Charge     Monthly Recurring Charge
                                                     
                      [*]                                  [*]
                                                           [*]
                                                           [*]


Scheduled or unscheduled Maintenance Charges: [*]

*Confidential treatment has been requested for a portion of this Exhibit


                                     -28-