Document:

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                                                                   EXHIBIT 10.19

           AGREEMENT FOR THE RECIPROCAL PURCHASE OF CAPACITY ON THE
              SYSTEMS OF EACH OF PRIMUS TELECOMMUNICATIONS GROUP
       INCORPORATED AND GLOBAL CROSSING HOLDINGS LTD. EFFECTIVE AS OF
               THE 24TH DAY OF MAY, 1999 (THE "EFFECTIVE DATE").

Primus Telecommunication Group Incorporated ("Primus") and Global Crossing
Holdings Ltd. ("Global Crossing") desire to make a reciprocal purchase
commitment of facilities owned and/or operated by the other, on the terms and
conditions contained herein.  As used herein, (i) the Global Crossing System
shall mean POP to POP (including backhaul) fiber connectivity on the Global
Crossing Network as depicted on the Global Crossing System Network Map attached
hereto as Annex A, and (ii) the PRIMUS Satellite System shall mean the earth
          -------
station to earth station satellite network of PRIMUS as depicted on the PRIMUS
Satellite Network Map attached hereto as Annex B.  The Ready for Service dates
                                         -------
(the "RFS Dates") of each component of the Global Crossing System Network Map
and the PRIMUS Satellite Network Map are depicted on Annex A and Annex B,
                                                     -------     -------
respectively.

1. PURCHASE AGREEMENT

       (a)  PRIMUS will endeavor to purchase MCUs on the Global Crossing System
in an aggregate amount of up to US $50,000,000 (the "Minimum Capacity
Commitment") during the period commencing on the Effective Date and ending
forty-eight (48) months later (the "Minimum Capacity Purchase Period").  In
order to fulfill the Minimum Capacity Commitment, PRIMUS shall endeavor to
purchase MCUs on the Global Crossing System in the average amount of $12,500,000
during each annual period (which shall mean, for the first such period, the
period beginning on the Effective Date and ending on December 31, 1999, and
thereafter each successive twelve (12) month period occurring during the term of
this Agreement).  Such average amount shall be determined on a rolling two year
basis.  For example, if during the first annual period PRIMUS purchases
$18,000,000 of capacity, then during the second annual period it need only
purchase $7,000,000 of capacity; however, if during the first annual period
                                 -------
PRIMUS purchases only $7,000,000 of capacity, then during the second annual
period PRIMUS must purchase at least $18,000,000 of capacity.  Notwithstanding
the foregoing and subject to capacity availability and Section 1(b) hereof,
PRIMUS hereby agrees to purchase:(i) a minimum of $9,375,000 of capacity in the
first eighteen (18) months after the Effective Date, $6,250,000 of capacity in
each of the following two years and $3,125,000 in the remaining six (6) months
of the Minimum Capacity Purchase Period; (ii) a minimum aggregate of $25,000,000
of capacity over the Minimum Capacity Purchase Period, and an OC-3 from New York
to Los Angeles at a purchase price of $6,332,000, together with a maintenance
fee of $9,842 per month, on or before May 31, 1999.  PRIMUS may resell any
capacity purchased hereunder to other third parties, except that PRIMUS will not
be permitted to resell pure capacity at the STM-1 level except to its affiliates
or if such capacity is part of a bundled service offering, for example, Internet
or data services.  Notwithstanding the foregoing, however, PRIMUS will be
permitted to resell capacity at the STM-1 level three (3) years after payment
for such capacity.

    (b)  The above commitment shall be subject to the following terms and
conditions:--

         (i)   if Global Crossing's RFS Dates (as depicted on Annex A) are
               delayed by more than ninety (90) days and PRIMUS must acquire
               fiver optic capacity during or after said ninety (90) days, the
               Minimum Capacity Commitment will be reduced by the amount of
               PRIMUS' capacity purchase. If this event should occur, and Global
               Crossing shall have notified PRIMUS within one hundred and twenty
               (120) days of the anticipated RFS date, Global Crossing will have
               the right to obtain interim fiber optic capacity of equal
               specifications on PRIMUS' behalf on a system acceptable to PRIMUS
               in its sole but reasonable commercial discretion PRIMUS and
               convert to Global Crossing's capacity on the RFS Date of the
               Global Crossing System at no additional cost to PRIMUS and with
               no interruption to PRIMUS' business; and

         (ii)  For PRIMUS' fiber optic capacity needs during the earlier of the
               term of this Agreement or when the Primus Minimum Capacity
               Commitment has been met, Global Crossing shall

<PAGE>

       have the right to match any other offer received by PRIMUS. Until such
       time as the Minimum Capacity Commitment is met, PRIMUS agrees to accept
       Global Crossing's offer if such offer is equal to or below the price of
       the competitive offer and Global Crossing makes its offer within five (5)
       business days' after receiving written notice from PRIMUS of a competing
       offer. In the event Global Crossing declines to provide a best and final
       offer or provides an offer which is not equal to or below the price of
       the competing offer, the Minimum Capacity Commitment will be reduced by
       the amount of the capacity purchased by PRIMUS on the competing system.
       Global Crossing shall provide all quotations for capacity on a city POP
       to city POP basis, and shall offer PRIMUS lease financing on all capacity
       purchases on substantially the same terms and conditions as contained in
       that certain Atlantic Crossing/AC-1 Submarine Cable System Capacity
       Purchase Agreement between PRIMUS and Atlantic Crossing Ltd. dated
       December 17, 1998 (the "Original AC-1 Agreement"), except that the
       interest rate shall be adjusted to reflect then current market rates.

(c)  Global Crossing's pricing of MCUs of fiber optic capacity purchased by
     PRIMUS under this Agreement shall be at the lower of (i) the best "Tier 3"
     Published Prices available as at the date of this Agreement, (ii) the best
     available "Tier 3" Published Prices thirty (30) days prior to activation of
     the specific fiber optic cable, (iii) the best available "Tier 3" Published
     Prices as of the date of purchase by PRIMUS, or (iv) the price of a
     competitive offer pursuant to Section 1(b)(ii) above if Global Crossing
     chooses to match such competitive offer. In the event Global Crossing
     adopts a measure of pricing which is more preferential than the "Tier 3"
     pricing stated above, such other measure shall be offered to PRIMUS
     pursuant to this Section 1(c), but always subject to the capacity
     commitment made by PRIMUS at that time. For the purposes of this Section
     1(c), Published Prices shall mean the prices set forth on Annex C, as it
     may be supplemented from time to time to include new Systems and to reflect
     any price reductions.

(d)  Global Crossing shall notify PRIMUS in writing when approximately one-half
     of the capacity then available on any particular cable system is sold so
     that PRIMUS will have the ability to purchase capacity prior to any
     shortages.

(e)  Purchases of capacity on any cable system pursuant to this Agreement shall
     be effected by PRIMUS executing, delivering and complying with a Capacity
     Purchase Agreement ("CPA") with the particular System Company, in a form
     substantially similar to the Original AC-1 Agreement.

(f)  Global Crossing will endeavor to purchase satellite capacity in the PRIMUS
     Satellite System in an aggregate amount of up to US $25,000,000 (the
     "Minimum Satellite Capacity Commitment") during the period commencing on
     the Effective Date and ending forty-eight (48) months later ("Minimum
     Satellite Capacity Purchase Period"). In order to fulfill the Minimum
     Satellite Capacity Commitment, Global Crossing shall endeavor to purchase
     satellite capacity in the average amount of $6,250,000 during each annual
     period. Such average amount shall be determined on a rolling two-year basis
     using the same formula as specified in Section 1(a) above. Notwithstanding
     the foregoing and subject to capacity availability and the other terms and
     conditions contained herein, Global Crossing hereby agrees to purchase (i)
     a minimum of $2,500,000 of satellite capacity in each year, and (ii) a
     minimum aggregate of $10,000,000 of satellite capacity over the Minimum
     Satellite Capacity Purchase Period. Global Crossing may resell any
     satellite capacity purchased hereunder to other third parties.

(g)  The above commitment shall be subject to the following terms and
     conditions:

     (i) if PRIMUS' RFS Dates (as depicted in Annex B) are delayed by more than
         ninety (90) days and Global Crossing must acquire satellite capacity
         during or after said ninety (90) days, the Minimum Satellite Capacity
         Commitment will be reduced by the amount of Global Crossing's satellite
         capacity purchase. If this event should occur, and PRIMUS shall have
         notified Global Crossing within one hundred and twenty (120) days of
         the anticipated RFS Date, PRIMUS will have the right to obtain interim
         satellite capacity on Global Crossing's behalf on a system acceptable
         to Global Crossing in its sole but reasonable commercial discretion and
         convert to PRIMUS' capacity at the RFS Date at no additional cost to
         Global Crossing and with no interruption to Global Crossing's business;
         and

<PAGE>

        (ii)  For Global Crossing's satellite capacity needs during the earlier
              of the term of this Agreement or when the Global Crossing Minimum
              Satellite Capacity Commitment has been met, PRIMUS shall have the
              right to match any other offer received by Global Crossing. Until
              such time as the Minimum Satellite Capacity Commitment has been
              met, Global Crossing agrees to accept PRIMUS' offer if such offer
              is equal to or below the price of the competitive offer and PRIMUS
              makes its offer within five (5) business days' after receiving
              written notice from Global Crossing of a competing offer. In the
              event PRIMUS declines to provide a best and final offer or
              provides an offer which is not equal to or below the price of the
              competing offer, the Minimum Satellite Capacity Commitment will be
              reduced by the amount of the capacity purchased by Global Crossing
              on the competing system.

2. Representations
   ---------------

   (a)  Global Crossing hereby represents and warrants to PRIMUS that (i) Global
        Crossing is a company duly organized and validly existing under the laws
        of Bermuda; (ii) the execution, delivery and performance of this
        Agreement by Global Crossing has been duly authorized by all necessary
        corporate action on the part of Global Crossing and this Agreement is a
        valid, binding and enforceable obligation of Global Crossing enforceable
        with its terms and (iii) the execution, delivery and performance of this
        Agreement by Global Crossing does not violate, conflict with or
        constitute a breach of, the organizational documents or any order,
        decree or judgment of any court, tribunal or governmental authority
        binding on Global Crossing.

   (b)  PRIMUS hereby represents and warrants Global Crossing that (i) PRIMUS is
        a corporation duly organized and validly existing under the laws of the
        State of Delaware; (ii) the execution, delivery and performance of this
        Agreement by PRIMUS has been duly authorized by all necessary corporate
        action on the part of PRIMUS and this Agreement is a valid, binding and
        enforceable obligation of PRIMUS enforceable in accordance with its
        terms; and (iii) the execution, delivery and performance of this
        Agreement by PRIMUS does not violate, conflict with or constitute a
        breach of, the organizational documents or any order, decree or judgment
        of any court, tribunal or governmental authority binding on PRIMUS.

3. SETTLEMENT OF DISPUTES
   ----------------------

   (a)  The Parties shall endeavor to settle amicably by mutual discussions any
        disputes, differences, or claims whatsoever related to this Agreement.

   (b)  Failing such amicable settlement, any controversy, claim or dispute
        arising under or relating to this Agreement, including the existence,
        validity, interpretation, performance, termination or breach thereof,
        shall finally be settled by arbitration in accordance with the
        International Arbitration Rules of the American Arbitration Association
        ("AAA"). There shall be three (3) arbitrators (the "Arbitration
        Tribunal"), the first of which shall be appointed by the claimant in its
        notice of arbitration, the second of which shall be appointed by the
        respondent within thirty (30) days of the appointment of the first
        arbitrator and the third of which shall be jointly appointed by the
        party-appointed arbitrators within thirty (30) days thereafter. The
        language of the arbitration shall be English. The Arbitration Tribunal
        shall issue a written opinion and will not have authority to award
        punitive damages to either party. Each party shall bear its own
        expenses, but the parties shall share equally the expenses of the
        Arbitration Tribunal and the AAA. This Agreement shall be enforceable,
        and any arbitration award shall be final, and judgment thereon may be
        entered in any court of competent jurisdiction. The arbitration shall be
        held in Washington, D.C., USA.

4. GOVERNING LAW
   -------------

   This Agreement shall be governed by and construed in accordance with the laws
   of the State of New York, United States of America.

5. WAIVER OF IMMUNITY
   ------------------
<PAGE>

     The parties acknowledge that this Agreement is commercial in nature, and
     each party hereto expressly and irrevocably waives any claim or right which
     it may have to immunity (whether sovereign immunity, act of state or
     otherwise) for itself or with respect to any of its assets in connection
     with an arbitration, arbitral award or other proceeding to enforce this
     Agreement, including, without limitation, immunity from service of process,
     immunity of any of its assets from pre- or post-judgment attachment or
     execution and immunity from the jurisdiction of any court or arbitral
     tribunal.

6.   NO THIRD PARTY BENEFICIARIES.
     ----------------------------

     This Agreement does not provide and is not intended to provide third
     parties (including, but not limited to, customers of PRIMUS or Global
     Crossing) with any remedy, claim, liability, reimbursement, cause of
     action, or any other right.

7.   ASSIGNMENT.
     ----------

     (a)  This Agreement and all of the provisions hereof shall be binding upon
          and inure to the benefit of the parties hereto and their respective
          successors and permitted assigns.

     (b)  Global Crossing shall solely be responsible for complying with all of
          the terms binding on "Global Crossing" hereunder and shall not be
          permitted to assign, transfer or otherwise dispose of any or all of
          its right, title or interest hereunder or delegate any or all of its
          obligations hereunder to any person or entity except that Global
                                                        ------
          Crossing shall be permitted to (i) effect a collateral assignment of
          its rights hereunder to one or more lenders to Global Crossing or its
          affiliates and (ii) assign, transfer or otherwise dispose of any or
          all of its rights hereunder and delegate any or all of its obligations
          hereunder to any present or future entity controlled by, under the
          same control as, or controlling, Global Crossing. Global Crossing
          shall give PRIMUS notice of any such assignment, transfer or other
          disposition or any such delegation.

     (c)  PRIMUS shall solely be responsible for complying with all of the terms
          binding on "PRIMUS" hereunder and shall not be permitted to assign,
          transfer or otherwise dispose of any or all of its right, title or
          interest hereunder or delegate any or all of its obligations hereunder
          to any person or entity; except that PRIMUS shall be permitted to (i)
          effect a collateral assignment of its rights hereunder to one or more
          lenders to PRIMUS or its affiliates and (ii) assign, transfer or
          otherwise dispose of any or all of its rights hereunder and delegate
          any or all of its obligations hereunder to any present or future
          entity controlled by, under the same control as, or controlling,
          PRIMUS. PRIMUS shall give Global Crossing notice of any such
          assignment, transfer or other disposition or any such delegation.

     (d)  Any assignment, transfer or other disposition by either party which is
          in violation of this Section 7 shall be void and of no force and
          effect.

8.   NOTICES.
     -------

     Each notice, demand, certification or other communication given or made
     under this Agreement shall be in writing and shall be delivered by hand or
     sent by registered mail or by facsimile transmission to the address of the
     respective party as shown below (or such other address as may be designated
     in writing to the other party hereto in accordance with the terms of this
     Section 8):

             If to the PRIMUS:   PRIMUS Telecommunications Group, Incorporated
                                 1700 Old Meadow Road
                                 McLean, Virginia 22102, USA

                          Att:   Neil L. Hazard, Executive VP.
                      Fax No.:   703-902-2814

    If to the Global Crossing:   Global Crossing Holdings Ltd.
                                 Wessex House
                                 45 Reid Street

<PAGE>

                                                                               5

                                 Hamilton HM12, Bermuda
                        Attn:    President
                        Fax No.: 441-296-8606

    Any change to the name, address and facsimile numbers may be made at any
    time by giving prior written notice in accordance with this Section 8. Any
    such notice, demand or other communication shall be deemed to have been
    received, if delivered by hand, at the time of delivery or, if posted, at
    the expiration of seven (7) days after the envelope containing the same
    shall have been deposited in the post maintained for such purpose, postage
    prepaid, or, if sent by facsimile at the date of transmission if confirmed
    receipt is followed by postal notice.

9.  SEVERABILITY.
    ------------

    If any provision of this Agreement is found by an arbitral, judicial or
    regulatory authority having jurisdiction to be void or unenforceable, such
    provision shall be deemed to be deleted from this Agreement and the
    remaining provisions shall continue in full force and effect.

10. HEADINGS.
    --------

    The Section headings of the Agreement are for convenience of reference only
    and are not intended to restrict, affect or influence the interpretation or
    construction of provisions of such Section.

11. COUNTERPARTS.
    ------------

    This Agreement may be executed in counterparts, each of which when executed
    and delivered shall be deemed an original. Such counterparts shall together
    (as well as separately) constitute one and the same instrument.

12. ENTIRE AGREEMENT.
    ----------------

    This Agreement supersedes all prior or written understandings between the
    parties hereto and constitutes the entire agreement with respect to the
    subject matter herein. This Agreement shall not be modified or amended
    except by a writing signed by authorized representatives of the parties
    hereto.

13. PUBLICITY AND CONFIDENTIALITY.
    -----------------------------

    (a) The provisions of this Agreement and any non-public information, written
        or oral, with respect to this Agreement ("Confidential Information")
        will be kept confidential and shall not be disclosed, in whole or in
        part, to any person other than affiliates, officers, directors,
        employees, agents or representatives of a party (collectively,
        "Representatives") who need to know such Confidential Information for
        the purpose of negotiating, executing and implementing this Agreement.
        Each party agrees to inform each of its Representatives of the non-
        public nature of the Confidential Information and to direct such persons
        to treat such Confidential Information in accordance with the terms of
        this Section. Nothing herein shall prevent a party from disclosing
        Confidential Information (i) upon the order of any court or
        administrative agency, (ii) upon the request or demand of, or pursuant
        to any regulation of, any regulatory agency or authority, (iii) to the
        extent reasonably required in connection with the exercise of any remedy
        hereunder, (iv) to a party's legal counsel or independent auditors, (v)
        to prospective lenders to the parties, and (vi) to any actual or
        proposed assignee, transferee or lessee of all or part of its rights
        hereunder provided that such actual or proposed assignee agrees in
        writing to be bound by the provisions of this Agreement.

    (b) The foregoing shall not restrict either party from publicity announcing
        that it has entered into this Agreement, but without including any
        details contained in this Agreement.

14. LIMITATION OF LIABILITY.
    -----------------------

<PAGE>

        In no event shall PRIMUS or Global Crossing be liable to the other for
        consequential, incidental, indirect or special damages, including, but
        not limited to, loss of revenue, loss of business opportunity, or the
        costs associated therewith.

        IN WITNESS WHEREOF, the parties have caused this Agreement to be
executed by a duly authorized officer as of the Effective Date.

                                        GLOBAL CROSSING HOLDINGS LTD.

                                        By: /s/ Doug Molyneux
                                            Name: Doug Molyneux
                                            Title:Secretary and Senior Counsel
                                            Jurisdiction: Bermuda

                                        PRIMUS TELECOMMUNICATIONS GROUP
                                        INCORPORATED

                                        By: /s/ K. Paul Singh
                                            Name: K. Paul Singh
                                            Title: CEO
                                            Jurisdiction: U.S.A.<PAGE>

                                                                  EXHIBIT 10.20*

* Confidential treatment has been requested in connection with this document.

                                  IRU AGREEMENT

      THIS IRU AGREEMENT (the "Agreement") is made and entered into as of this
30th day of December, 1999 ("Effective Date"), by and between QWEST
COMMUNICATIONS CORPORATION, a Delaware corporation ("Qwest"), and PRIMUS
TELECOMMUNICATIONS, INC., a Delaware corporation ("Customer").

                                    RECITALS:

WHEREAS, Qwest owns and operates a fiber optic telecommunications network
between various points in the United States; and

WHEREAS, Customer desires to obtain certain indefeasible rights of use to
certain telecommunications capacity to be provided by means of Qwest's domestic
fiber optic telecommunications network; and

WHEREAS, Qwest desires to hereby grant and Customer desires to be granted
certain indefeasible rights of use to such capacity as more fully set forth
herein; and

WHEREAS, the parties previously entered into a separate IRU Agreement dated as
of September 14, 1998, which was superceded by a separate IRU Agreement dated as
of September 30, 1999 (collectively, the "Prior Agreement") all of which will
terminate upon the Effective Date of this Agreement, as more fully described
herein.

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.

1. DEFINITIONS

The following terms shall have the meanings set forth in this Article when used
in this Agreement, unless explicitly stated to the contrary:

1.1 "Affiliate" means any person, which directly or indirectly controls or is
controlled by, or is under common control with, a party hereto.

1.2 "Capacity" means the digital transmission capability of a given portion of
the Qwest Network designed to transmit digital signals at a stated rate and
otherwise perform in accordance with the specifications applicable to the
portion of the Qwest Network utilized to provide the Capacity. All Capacity
shall be provided by Qwest Network facilities inclusive of all electronics and
other equipment necessary for the intended operation of the Capacity; provided,
however, that interruptions, outages, or degradations in the actual transmission
capability of the Capacity may occur from time to time.
<PAGE>

1.3 "Gross-connect Panel" means the piece of equipment designated by Qwest in a
Qwest POP at which the IRU is terminated and at which location Customer may have
access to and interconnect with the IRU through use of Local Distribution
Facilities or other facilities acceptable to Qwest.

1.4 "Delivery" of an IRU means that the applicable IRU will be available for
use at the Cross-connect Panels designated by Qwest hereunder and will perform
in accordance with the Technical Specifications attached hereto.

1.5 "Impositions" means all taxes, fees, levies, imposts, duties, charges or
withholdings of any nature (including, without limitation, gross receipts taxes
and franchise, license and permit fees), together with any penalties, fines, or
interest thereon arising out of the transactions contemplated by this Agreement
and/or imposed upon either party hereto by any federal, state or local
government or other public taxing authority of any country.

1.6 "Indefeasible Right of Use" or "IRU" means an indefeasible right of use, "as
is and where is," for the purposes described herein, in the amount of Capacity
on the Qwest Network for each User Route set forth herein; provided, that the
applicable IRU(s) granted hereunder do not provide Customer with any ownership
interest in or other rights to physical access to, control of, modification of,
encumbrance in any manner of, or other use of the Qwest Network except as
expressly set forth herein.

1.7 "Local Distribution Facilities" means those telecommunications transmission
facilities which interconnect with the applicable IRU at a Cross-connect Panel
and extend each User Route of the applicable IRU to a location outside of the
Qwest POP. Unless otherwise specified herein, such Local Distribution Facilities
shall be separately acquired by Customer and may be provided by a local
telephone company or other third party, and must comply with Qwest's reasonable
applicable engineering and operations requirements. Local Distribution
Facilities are not part of the IRU(s) acquired by Customer hereunder, and
Customer's acceptance of each IRU granted hereunder may not be conditioned upon
the availability of such Local Distribution Facilities.

1.8 "OC-3" means a dedicated, point to point, high capacity, full duplex channel
along the Qwest Network with a line speed of approximately 155.52 million bits
per second synchronous serial data.

1.9 "OC-12" means a dedicated, point to point, high capacity, full duplex
channel along the Qwest Network with a line speed of approximately 622 million
bits per second synchronous serial data.

1.10 "OC-48" means a dedicated, point to point, high capacity, full duplex
channel along the Qwest Network with a line speed of approximately 2488 million
bits per second synchronous serial data.

                                       2
<PAGE>

1.11 "POP" means the Qwest terminal facility (point of presence) where the
Capacity subject to an IRU is delivered to Customer.

1.12 "Qwest Network" means the fiber optic telecommunications network operated
by Qwest in the United States, including at the election of Qwest such
telecommunications capacity as Qwest may obtain from another network provider
and integrate into its own network for purposes of providing services or
Capacity to its customers. Although Qwest possesses telecommunications network
facilities and capacity in locations other than the United States, such network
facilities and capacity are not part of the Qwest Network for purposes of this
Agreement.

1.13 "User Route" means the route along which each digital private line circuit
is placed by Qwest on the Qwest Network, as more particularly described in
Exhibit A hereto. For operational and maintenance purposes only, Qwest reserves
the right to alter temporarily each applicable User Route, provided that such
alterations do not result in changes to the endpoints (POPs) of the applicable
User Route.

1.14 "V&H Miles" is a measurement of the length in miles between the termination
points of a User Route using airline miles and determined based on the vertical
and horizontal geographic coordinates of the locations of the termination
points.

2. GRANT OF IRU(S) IN QWEST NETWORK

2.1 For each of the User Routes set forth in Exhibit A hereto, Qwest hereby
grants to Customer an IRU to OC-3 or OC-12 Capacity (as specified on Exhibit A).

*2.2 The IRU(s) described above shall be delivered to Customer at a Cross-
connect Panel located in each of the Qwest POPs in the cities identified in
Exhibit A. On a "where available, preferred vendor" basis and for the purpose of
utilizing the IRUs granted hereunder, Customer shall be entitled to necessary
space of up to approximately five hundred (500) square feet at each of the
Qwest's POPs identified in Exhibit A to co-locate Customer's equipment. For each
co-location site requested by Customer hereunder, Customer agrees to execute a
co-location agreement substantially in the form appended hereto as Exhibit D. In
the event Qwest does not have available co-location space during the Waiver
Period to satisfy Customer's co-location requirements, then Qwest will
coordinate with Customer to provide alternative co-location space with a third
party provider. Qwest shall reimburse Customer for said alternative co-location
costs, up to an amount not to exceed Qwest's standard cost for comparable co-
location services, until the earlier of: (i) the date upon which Qwest can make
available the requested co-location space; or (ii) April 1, 2002. It shall be
the responsibility of Customer to obtain any required Local Distribution
Facilities to interconnect with each of the IRU(s) granted herein.

2.3 *

                                       3
<PAGE>

2.4* In consideration of the purchase of the Capacity hereunder, Qwest also
agrees to exchange TCP/iP routing information and traffic with Customer (on a
private peering basis), at agreed upon interconnection points, excluding third
party transit services. For purposes hereof, "transit" shall mean the exchange
of routing information and traffic which has neither a source nor a destination
on the transit provider's Internet network. Any Customer interconnection or
other costs associated with said peering fights shall be borne by Customer.

2.5 Qwest agrees to make available for purchase by Customer, an additional IRU
grant in STM-4 Capacity on the AC-1 Cable with landing points at New York, N.Y.
and London, England. The purchase price for said additional Capacity shall be *,
plus mutually agreeable O&M fees. The Parties agree to execute a mutually
acceptable IRU agreement for the purchase of said additional Capacity within
ninety (90) days of the Effective Date of this Agreement.

3. CONSIDERATION FOR GRANT OF THE IRU(S)

3.1 In consideration of the grant of each IRU described in Section 2.1 above by
Qwest to Customer, Customer agrees to pay to Qwest each of the IRU fees set
forth in Exhibit A to this Agreement, subject to a credit of Five Million Five
Hundred Ninety Six Thousand Eight Hundred Nineteen and 20/1 00 Dollars
($5,596,819.20) which is due Customer for Qwest's repurchase of the IRU User
Routes identified in Exhibit A (provided however that this credit is due
Customer only after it pays in full, pursuant to the schedule therein, all
balances remaining due under the Prior Agreement, which payment obligation shall
expressly survive the termination of the Prior Agreement), said credit balances
to be applied to the final payment obligation set forth in this Agreement. Other
than as expressly provided for herein, there shall be no further liability on
the part of either party on account of the Prior Agreement. Notwithstanding
anything to the contrary contained herein, Customer shall have the option to pay
the applicable IRU fees as follows: *.

3.2 For the Term (as defined below) of the granted IRU(s), Customer shall also
pay to Qwest a monthly recurring operation and maintenance charge (the "O&M
Charge") calculated at the rate of * per DS-0 V&H Mile due beginning * following
the Acceptance Date of each such IRU and continuing each month thereafter for
the duration of the Term. *.

4. DELIVERY AND ACCEPTANCE TESTING OF CUSTOMER CAPACITY

                                       4
<PAGE>

4.1. The IRUs identified in the Prior Agreement have been previously fully
provisioned to and accepted by Customer under the Prior Agreement. The
Acceptance Date for such IRUs shall remain the same as under the Prior
Agreement; however, the O&M charges shall be modified to reflect the terms of
this Agreement. As of the Effective Date, such IRUs shall be migrated to and
governed exclusively by the terms and conditions of this Agreement. With respect
to new IRU User Routes identified on Exhibit A, Qwest will use commercially
reasonable efforts to Deliver said User Routes within ninety (90) days following
the Effective Date.

4.2. At Delivery, all IRU(s) shall comply with the specifications set forth in
Exhibit B hereto (the "IRU Specifications and Acceptance Testing"). Qwest shall
test such IRU(s) in accordance with the procedures specified in Exhibit B to
verify that such IRU(s) are operating in accordance with the IRU Specifications
and Acceptance Testing. Qwest shall provide Customer with reasonable advance
notice of the date and time of any such IRU acceptance test (each of which shall
take place during normal business hours) such that Customer shall have the
right, but not the obligation, to have a person or persons present to observe
the tests.

4.3. In the event the results of any IRU acceptance test shows that the granted
IRU is not operating within the parameters of the applicable IRU Specifications
and Acceptance Testing, Qwest shall expeditiously take such action as shall be
commercially reasonably necessary, with respect to such portion of the IRU as
does not operate within the parameters of the applicable IRU Specifications and
Acceptance Testing, to bring the operating standards of such portion of the IRU
within such parameters. In no event shall the unavailability, incompatibility,
delay in installation, or other impairment of any of Customer's (including
Customer's suppliers (e.g., a local access telephone service provider))
interconnection facilities be used as a basis for rejecting any Capacity or IRU
provided hereunder.

4.4 If and when Qwest notifies Customer that the test results of an IRU
acceptance test are within the parameters of the IRU Specifications and
Acceptance Testing with respect to the tested IRU, Customer shall provide Qwest
with a written notice accepting the IRU. Such written notice shall specify the
Qwest "Circuit ID" number associated with the IRU granted hereunder. If Customer
fails to notify Qwest of its acceptance or rejection of the final test results
with respect to the tested IRU within ten (10) days after its receipt of notice
of such test results, Customer shall be deemed to have accepted the tested IRU.
The date of such notice of acceptance (or deemed acceptance) of the Capacity
shall be the "Acceptance Date" for such IRU.

5. TERM

5.1 The term of this Agreement (the "Term") shall begin on the Effective Date
(provided that the grant of each IRU hereunder shall not become effective until
the Acceptance Date for that particular IRU and each such IRU User Route granted
hereunder shall last for a period of no more than twenty (20) years from the
Acceptance Date of each such IRU User Route); and shall continue with respect to
each IRU purchased hereunder, unless expressly stated to the contrary herein,
until the earlier of:

      (a)   Twenty (20) years from the Acceptance Date of the last IRU granted
            hereunder; or

                                       5
<PAGE>

      (b)   the date on which Customer notifies Qwest in writing that the last
            IRU subject to this Agreement has, in Customer's determination,
            reached the end of its economically useful life and that Customer
            desires to not retain its Indefeasible Right of Use in such IRU.

5.2 Subject to the option rights set forth in Section 5.3 below, upon the
expiration of the Term hereof, all of Customer's rights to the use of each of
the granted IRU(s) described herein shall revert to Qwest without reimbursement
by Qwest of any fees or other payments previously made with respect thereto, and
from and after such time Customer shall have no further rights or obligations
(excepting such obligations as shall have arisen prior to the date of expiration
of the Term) with respect to the granted IRU(s).

5.3 Upon written notice from Customer to Qwest given no later than thirty (30)
calendar days prior to the expiration of the applicable IRU Term, Customer may
elect to purchase, effective as of the expiration of the applicable IRU Term, an
undivided interest in the fiber associated with the Capacity granted hereunder
for One Dollar (US $1.00) per IRU User Route (the "Purchase Option"), provided
that: (i) the undivided ownership interest to such fiber shall be granted to
Customer on an "as-is, where-is" basis, without warranty, express or implied,
and (ii) Customer shall thereafter be subject to pay a monthly recurring
operation and maintenance charge ("O&M Charge") at the then fair market value
rate as determined by Qwest upon acceptance of the Purchase Option by the
Customer. If Customer exercises the Purchase Option and thereafter fails to pay
the O&M Charge when it is due on a monthly basis, then, upon written notice by
Qwest to Customer, Qwest shall have the immediate right to cease provisioning
without liability any and all O&M Services, equipment, and any other ancillary
services applicable to the fiber, regardless of the effect such discontinuation
may have on Customer's ability to continue using the purchased fiber thereafter.
The Purchase Option shall expire, if not exercised, at the expiration of the
applicable IRU Term for each IRU User Route. The Purchase Option shall not: (1)
include any rights to or interest in any conduit, real property (other than the
fiber component Purchase Option granted hereunder), equipment, tangible or other
physical assets used by Qwest in connection with or necessary to provision the
IRU(s) granted hereunder (the "Physical Assets"); (2) be construed as
encumbering in any way the Qwest Network or Qwest's ability to modify,
reconfigure, sell, or decommission any or all of the Physical Assets; and (3)
confer any rights or benefits upon Customer as a result of any changes or
improvements in technology, including without limitation any changes in
technology which would increase the capacity of the IRU that is subject to the
Purchase Option.

5.4 Upon mutual agreement of the parties, Customer may, upon thirty (30) days
written notice provided to Qwest, sell back on a one-time basis any IRU User
Route set forth in Exhibit A in exchange for Customer's purchase, upon similar
terms and conditions as those described herein (including term) of an IRU with
greater bandwith than the IRU sold and along the same User Route. In the event
Customer wants to sell back a circuit for purposes of upgrading, the Qwest
repurchase price will be for fair market value of the IRU User Route being
purchased by Qwest as of the repurchase date. This upgrade clause shall be
available during the Term of the Agreement and the IRU fee applicable to the
upgraded circuit shall be calculated using a * per DS-0 V&H mile rate.

                                       6
<PAGE>

6. OPERATIONS AND MAINTENANCE OF CUSTOMER CAPACITY AND OUTAGE CREDITS

6.1 The granted IRU(s) do not provide Customer with any right to control any
network or service configuration or design, routing configuration, regrooming,
rearrangement or consolidation of channels or circuits or any similar or related
functions with regard to the Qwest Network. The granted IRU(s) are subject to
and shall be implemented in accordance with Qwest's network operations and
maintenance procedures and policies, as these may be modified from time to time
by Qwest.

6.2 Qwest will use reasonable commercial efforts to provide the maintenance
services described in this Article. All operating and maintenance charges are
set forth in Exhibit A, if not included in the applicable IRU Fee(s) set forth
in Article 3. Such maintenance, however, does not ensure that each IRU granted
hereunder will perform during the Term continuously in accordance with the IRU
Specifications and Acceptance Testing.

6.3 Customer acknowledges the possibility of an unscheduled, continuous and/or
interrupted period of time when any IRU, or a portion thereof, is "unavailable"
(as defined in the IRU Specifications and Acceptance Testing) (hereafter an
"Outage"). In the event of an Outage, Customer shall be entitled to a credit or
refund, as applicable (the "Outage Credit") against future charges with respect
to the applicable IRU determined in accordance with the following table:

Aggregate Duration of Outages
(In Minutes)                                    Outage Credit
------------                                    -------------

0 - 5                                             Formula Below
6 - 30                                            *
31 - 60                                           *
61 - 120                                          *
121 - 180                                         *
181 - 240                                         *
240+                                              *

      6.3.1 The Outage Credit shall apply only to an Outage on the Qwest Fiber
Network and excludes the Local Distribution Facilities to the Customer's
premise.

      6.3.2 The aggregate total Outage Credit amount for any given month during
the Term for all affected IRU User Routes provisioned hereunder shall not exceed
* per month and for the Term the aggregate total Outage Credit amount shall not
exceed the total IRU Fee.

                                       7
<PAGE>

      6.3.3 The length of each Outage shall be calculated in minutes, rounded up
to the nearest minute. An Outage shall be deemed to have commenced upon
verifiable notification thereof by Customer to Qwest, or, when indicated by
network control information actually known to Qwest network personnel operating
the Network at the time of the Outage, whichever is earlier. Each Outage shall
be deemed to terminate upon restoration of the affected IRU User Route, as
evidenced by appropriate network tests by Qwest and provided the IRU User Route
substantially performs in accordance with IRU Specifications and Acceptance
Testing. Qwest shall give written or electronic notice to Customer of any
scheduled or planned maintenance that will result in an Outage as early as
possible and shall use reasonable efforts to minimize any disruption to
Customer's usage of the applicable IRU User Route. Notwithstanding the
foregoing, any such scheduled or planned maintenance which results in an outage
often (10) minutes or less and for which Customer received advance written or
electronic notice shall not be deemed an Outage pursuant to Section 6.3 above.

      6.3.5 No Outage Credit shall be granted if the malfunction of any
end-to-end capacity or circuit is due to an Outage or other Defect occurring in
Customer's Local Distribution Facilities.

      6.3.6 Subject to the terms and conditions in this Article 6 and upon
Customer's written request, all Outage Credits shall be credited towards any
future invoice from Qwest to Customer whether or not such invoice is made
pursuant to this Agreement, or in any other agreement between Customer and
Qwest. Notwithstanding the foregoing, however, in the event the Outage Credit
balance remaining due as of the last two months of the Term applicable to each
IRU User Route purchased hereunder exceeds any amounts owing to Qwest, Customer
shall be entitled to prompt receipt of a cash refund.

      6.4 The Outage Credit described in this Article 6 is the sole and
exclusive remedy of Customer in the event of any Outage; provided, however, that
an Outage, or series of related Outages, that exceeds 24 hours shall be
considered a default under this Agreement and Customer's sole and exclusive
remedy in the event of such Qwest default shall be to receive a pro-rata refund
of any unused portion of the IRU Fee applicable to the terminated IRU User
Route(s).

7. ACCESS TO QWEST POPS

7.1 Customer and its designees (such as local telecommunications providers)
shall have access to each of the Qwest POPs specified in Exhibit A, and the
right to interconnect with each granted IRU, according to the access and
interconnection standards and procedures regularly established by Qwest, as
these may be modified by it from time to time.

8. USE OF CUSTOMER CAPACITY

8.1 Customer represents and warrants that its use of each IRU granted hereunder
shall comply with all applicable laws, ordinances, rules, regulations and
restrictions.

                                       8
<PAGE>

8.2 Customer agrees and acknowledges that this Agreement grants no right to use
any element of the Qwest Network other than the IRU(s) granted herein. Customer
shall keep any and all of the Qwest Network, other than the IRU(s), free from
any liens, rights or claims of any third party attributable to Customer.

8.3 Customer shall be responsible for its own configuration and use of each IRU;
including the provisioning of all Local Distribution Facilities, interconnection
facilities, network equipment, testing equipment and procedures, maintenance,
and other facilities or actions necessary to utilize each IRU. Customer shall
conduct all such operations and use of the IRU(s) in manner which does not
interfere with the operations of the Qwest Network or the use thereof by any
other customer of Qwest. Customer shall comply at all times with the operating
procedures and interconnection requirements of Qwest.

8.4 Customer shall endeavor to include in each customer agreement or tariff
covering any service that utilizes any portion of the granted IRU(s) to any
third party, a provision which limits the liability of Customer thereunder for
interruptions, failures, or degradation of service to the charges received by
Customer for such service.

8.5 Customer and Qwest each agree to cooperate with and support the other in
complying with any requirements applicable to their respective rights and
obligations hereunder imposed by any governmental or regulatory agency or
authority.

9. INDEMNIFICATION

9.1 Customer hereby releases and agrees to indemnify, defend, protect and hold
harmless Qwest, its employees, officers, directors, agents, shareholders and
affiliates, from and against, and assumes liability for:

            (a) Any injury, loss or damage to any person, tangible property or
      facilities of any third person or entity (including reasonable attorneys'
      fees and costs) to the extent arising out of or resulting from either: (i)
      the willful acts or omissions of Customer, its officers, employees,
      servants, affiliates, agents, contractors, licensees, invitees or vendors;
      or (ii) other acts and omissions of Customer constituting a default under
      this Agreement;

            (b) Any claims, liabilities or damages arising out of any violation
      by Customer of any regulation, rule, statute or court order of any local,
      state or federal governmental agency, court or body in connection with its
      use of the granted IRU(s) hereunder;

            (c) Any claims, liabilities or damages arising out of any
      interference with or infringement of the rights of any third party as a
      result of Customer's use of any IRU granted hereunder not in accordance
      with the provisions of this Agreement; and

            (d) The use, resale, sharing or modification of the Capacity by
      Customer and/or its users.

                                       9
<PAGE>

9.2 Qwest hereby releases and agrees to indemnify, defend, protect and hold
harmless Customer, its employees, officers, directors, agents, shareholders and
affiliates, from and against, and assumes liability for:

            (e) Any injury, loss or damage to any person, tangible property or
      facilities of any third person or entity (including reasonable attorneys'
      fees and costs) to the extent arising out of or resulting from either: (i)
      the willful acts or omissions of Qwest, its officers, employees, servants,
      affiliates, agents, contractors, licensees, invitees or vendors.

            (f) Any claims, liabilities or damages arising out of any violation
      by Qwest of any regulation, rule, statute or court order of any local,
      state or federal governmental agency, court or body in connection with its
      use of the granted IRU(s) hereunder;

9.2 Nothing contained herein shall operate as a limitation on Qwest to bring an
action for damages against any third party, including indirect, special or
consequential damages, based on any acts or omissions of such third party as
such acts or omissions may affect the construction, operation or use of the
granted IRU(s) or the Qwest Network; provided however, that Customer shall
assign such rights or claims, execute such documents and do whatever else may be
reasonably necessary to enable Qwest to pursue any such action against such
third party.

10. LIMITATION OF LIABILITY; DISCLAIMER OF WARRANTIES

10.1 Neither party shall be liable to the other party for any special,
incidental, indirect, punitive or consequential damages (whether or not such
damages were foreseeable or a party was notified of the possibility thereof)
arising out of, or in connection with such party's failure to perform its
respective obligations hereunder, including, but not limited to, damage or loss
of property or equipment, loss of profits or revenue (whether arising out of
Outages, transmission interruptions or problems, any interruption or degradation
of the functioning of the granted IRU(s) or otherwise), cost of capital, cost of
replacement services, 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, without limitation, breach of contract, breach of warranty,
negligence, or strict liability, all claims for which damages are hereby
specifically waived.

10.2 EXCEPT AS EXPRESSLY SET FORTH HEREIN, QWEST DISCLAIMS ANY AND ALL
WARRANTIES, EXPRESS OR IMPLIED, WITH RESPECT TO THE CUSTOMER CAPACITY AND THE
GRANTED IRU(s), INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE.

11. INSURANCE

11.1 During the Term of this Agreement, Customer shall obtain and maintain, at
its expense, an appropriate corporate general liability insurance policy with
terms equal to or greater than

                                       10
<PAGE>

One Million U.S. Dollars (US$1,000,000) and provide Qwest with a copy of such
policy on request.

12. PAYMENT

12.1 Except as otherwise expressly provided for herein, all payments due
hereunder, if any, shall be due thirty (30) days after the date of Qwest's
invoice. If any amount due under this Agreement is not received by its
respective due date, in addition to its other available remedies, Qwest may in
its sole discretion impose a late payment charge pursuant to Section 12.2.
Notwithstanding anything in this Agreement to the contrary, no payment due
hereunder is subject to reduction, set-off or adjustment of any nature by
Customer. All disputes or requests for billing adjustments must be submitted in
writing by the due date and submitted with payment of undisputed amounts due.
Any amounts which are determined by Qwest to be in error or not in compliance
with Agreement shall be adjusted on the next month's invoice. Any disputed
amounts which are deemed by Qwest to be correct as billed and in compliance with
this Agreement, shall be due and payable by Customer, upon notification and
demand by Qwest, along with any late payment charges which Qwest may impose
pursuant to Section 12.2. Disputes shall not be cause for Customer to delay
payment of the undisputed balance to Qwest according to the terms outlined in
this Article. Invoices submitted to Customer by Qwest shall conform to Qwest's
standard billing format and content, as modified by Qwest from time to time.

12.2 In the event a party shall fail to make any payment under this Agreement
when due, such amounts shall accrue interest, from the date such payment is due
until paid, including accrued interest, at an annual rate equal to one hundred
fifty percent (150%) of the prime rate of interest published by The Wall Street
Journal or, if lower, the highest percentage allowed by law. In addition, Qwest
may offset any amounts not paid when due from any amounts that Qwest owes to
Customer under any other agreements between the parties.

13. CHARACTERIZATION OF TRANSACTION

13.1 The parties intend that each IRU granted in this Agreement does not provide
Customer with any ownership or other possessory interests in any real property,
conduit, fiber, or equipment in or on the Qwest Network or along the User Route
of the Qwest Network. Further, it is not the intention of the parties to create
a loan or other financing arrangement between the parties. However, in case the
express intent of the parties is not given legal effect and that any portion of
the transaction is deemed to constitute a loan or other financing arrangement,
or that any rights in the IRU(s) granted herein are deemed to be the property of
Customer, Customer hereby grants to Qwest, as security for the payment of all
amounts due from Customer and the performance of all other obligations of
Customer hereunder, a first-priority security interest in and continuing lien
upon all of Customer's right (including any right Customer may have to convey
title thereto), title and interest in (i) the granted IRU(s), (ii) all rights of
Customer under this Agreement, and (iii) any and all income, proceeds, products
and profits of any of the foregoing, all payment thereon, and any and all
additions thereto.

                                       11
<PAGE>

13.2 Simultaneously with the execution of this Agreement, and at any subsequent
time during the Term of this Agreement upon request of Qwest, Customer will
execute and deliver to Qwest such financing statements and continuation
statements as Qwest may require for purposes of perfecting and continuing the
perfection of each security interest and continuing lien.

14. TAXES, FEES AND OTHER GOVERNMENTAL IMPOSITIONS

14.1 Customer shall be independently responsible for any Impositions properly
payable with respect to the granted IRU(s). The parties agree that they will
cooperate with each other and coordinate their mutual efforts concerning audits,
or other such inquiries, filings, reports, etc., as may relate solely to the
activities or transactions arising from or under this Agreement, which may be
required or initiated from or by any duly authorized governmental tax authority.

14.2 The parties agree that the payment(s) set forth in Article 3 will be
allocated to rental periods as detailed in the Payment Allocation Schedule,
Exhibit C, attached hereto. It is understood and agreed between Qwest and
Customer that the grant of the IRU in the Qwest Capacity hereunder shall be
treated for federal, state, and local tax purposes as the lease of the Qwest
Capacity hereto pursuant to ss.467 of the Internal Revenue Code of 1986 and
according to the schedule set forth on Exhibit C. The parties further agree to
file their respective income and other tax returns and reports on such basis
and, except as otherwise required by law, not to take any positions inconsistent
therewith.

15. NOTICE

14.1 Unless otherwise provided herein, all notices and communications concerning
this Agreement shall be in writing and addressed to the other party as follows:

        If to Qwest:       Qwest Communications Corporation
                           Attention: Senior Vice President -- Wholesale Markets
                           555 Seventeenth Street
                           Denver, Colorado 80202
                           Telephone No.: (303) 992-1400
                           Facsimile No.: (303) 992-1724

        with a copy to:    Qwest Communications Corporation
                           Attention: Executive Vice President & General Counsel
                           555 Seventeenth Sweet
                           Denver, Colorado 80202
                           Telephone No.:   (303) 992-1400
                           Facsimile No.:   (303) 992-1724

        If to Customer:    Primus Telecommunications, Inc.
                           Attention: COO North America
                           1700 Old Meadow Road, Third Floor
                           McLean, Virginia 22102

                                       12
<PAGE>

                          Telephone No.: (703) 902-2800
                          Facsimile No.: (703) 902-2814

        With a copy to:   Primus Telecommunications, Inc.
                          Attention: General Counsel
                          1700 Old Meadow Road, Third Floor
                          McLean, Virginia 22102
                          Telephone No.: (703) 902-2800
                          Facsimile No.: (703) 902-2814

or at such other address as either party may designated from time to time in
writing to the other party.

15.2 Unless otherwise provided herein, notices shall be hand delivered, sent by
registered or certified U.S. mail, postage prepaid, or by commercial overnight
delivery service, or 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, upon confirmation of sending when sent by
fax, on the day after being sent when sent by overnight delivery service, or
three (3) days after deposit in the mail when sent by U.S. mail.

16. CONFIDENTIALITY

16.1 Qwest and Customer hereby agree that if either party (the "Disclosing
Party") provides confidential or proprietary information to the other party
("Proprietary Information") to the other party (the "Recipient Party"), such
Proprietary Information shall be held in confidence, and the Recipient 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. This Agreement, including its existence
and all of the terms, conditions and provisions hereof, constitutes Proprietary
Information, and 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 confidential or proprietary, and verbal information is
indicated as being confidential or proprietary when given or 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 Recipient 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 Recipient 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
purposes and intent of this Agreement, or as otherwise may be permitted in
writing by the Disclosing Party.

16.2 The foregoing provisions of Section 16.1 shall not apply to any Proprietary
Information which: (i) becomes publicly available other than through the
Recipient Party; (ii) is required to be disclosed by a governmental or judicial
law, order, rule or regulation; (iii) is independently developed by the
Recipient Party; (iv) becomes available to the Recipient Party without

                                       13
<PAGE>

restriction from a third party; or (v) becomes relevant to the settlement of any
dispute or enforcement of either party's rights under this Agreement and in
accordance with its terms and conditions. If any Proprietary Information is
required to be disclosed pursuant to the foregoing clause, the party required to
make such disclosure shall promptly inform the other party of the requirements
of such disclosure and take all reasonable protective measures to preserve the
confidentiality of such Proprietary Information as fully as possible in the
context of such permitted disclosure.

16.3 Notwithstanding Sections 16.1 and 16.2, either party may disclose
Proprietary Information to its employees, agents, and legal, financial, and
accounting advisors and providers (including its lenders and other financiers)
to the extent necessary or appropriate in connection with the negotiation and/or
performance of this Agreement or its obtaining of 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.

16.4 The provisions of this Article 16 shall survive for a period of two (2)
years from the date of the expiration or termination of this Agreement.

17. DEFAULT

17.1 A party shall be in default under this Agreement thirty (30) days after the
non-defaulting party shall have given written notice of such default unless the
defaulting party shall have cured such default or such default is otherwise
waived by the non-defaulting party within such thirty (30) days; provided,
however, that where any such default other than the payment of money cannot
reasonably be cured within such 30-day period, if the defaulting party shall
proceed promptly to cure the same and prosecute such cure with due diligence,
the time for curing such default shall be extended for such period of time not
to exceed ninety (90) days as may be necessary to complete such cure.

17.2 Events of default also shall include, but not be limited to, the following:
(i) failure to make any payment when due hereunder; (ii) breach of any material
provision hereof not cured within thirty (30) days following written notice by
the non-defaulting party; (iii) the making by either party of a general
assignment for the benefit of its creditors; or (iv) the filing of a voluntary
petition in bankruptcy or the filing of a petition in bankruptcy or other
insolvency protection against either party which is not dismissed within ninety
(90) days thereafter, or the filing by either party of any petition or answer
seeking, consenting to, or acquiescing in reorganization, arrangement,
adjustment, composition, liquidation, dissolution, or similar relief.

17.3 In addition to the specific remedies provided hereunder, upon any
non-payment or other default by Customer, Qwest may: (i) take such action as it
determines, in its sole discretion, to be necessary to correct the default;
and/or (ii) pursue any other legal remedies it may have under applicable law or
principles of equity relating to such default, provided that appropriate notice
has been given under this Section.

18. TERMINATION

                                       14
<PAGE>

18.1 Either party may terminate this Agreement upon the failure of the other
party to cure an event of default as required by Article 18. In the event
Customer terminates this Agreement or any User Route provided hereunder as a
result of a default by Qwest under Article 18, Customer's sole and exclusive
remedy shall be to receive a pro-rata refund of any unused portion of the IRU
Fee applicable to the terminated IRU User Route(s).

18.2 Notwithstanding the foregoing, no termination or expiration of this
Agreement shall affect the rights or obligations of any party hereto with
respect to any then existing defaults or the obligation to make any payment
hereunder for services rendered prior to the date of termination or expiration.

19. FORCE MAJEURE

19.1 Neither party shall be in default under this Agreement if and to the extent
that any 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 cut,
material shortages or unavailability or other delay in delivery not resulting
from the responsible party's failure to timely place orders therefor; lack of or
delay in transportation; government codes, ordinances, laws, rules, regulations
or restrictions (collectively, "Regulations"); war or civil disorder; failure of
a third party to grant a required right-of-way permit, easement, or other
required authorization for use of the intended right-of-way, or any other cause
beyond the commercially reasonable control of such party. 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.

20. ARBITRATION

20.1 Any dispute or disagreement arising between Qwest and Customer in
connection with this Agreement which is not settled to the mutual satisfaction
of Qwest and Customer within thirty (30) days from the date that either party
informs the other in writing that such dispute or disagreement exists, shall be
settled by arbitration in Washington, D.C. 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 (15) days from the commencement of any such
arbitration, each party shall select an arbitrator and the two (2) arbitrators
shall mutually select a third arbitrator, the three of whom shall serve as an
arbitration panel. The decision of the arbitrator(s) 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(s), shall be shared equally by the parties hereto unless the award
otherwise provides.

20.2 The obligation herein to arbitrate shall not be binding upon any party with
respect to requests for preliminary injunctions, temporary restraining orders or
other similar temporary procedures in a court of competent jurisdiction to
obtain interim relief when deemed necessary

                                       15
<PAGE>

by such court to preserve the status quo or prevent irreparable injury pending
resolution by arbitration of the actual dispute. It is not the intention of the
parties that such injunctive procedures shall be in lieu of, or cause
substantial delay to, any arbitration proceeding commenced under Section 20.1
above.

21. WAIVER

21.1 The failure of either party hereto 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.

22. GOVERNING LAW

22.1 This Agreement shall be governed by and construed in accordance with the
domestic laws of the State of New York, without reference to its choice of law
principles.

23. RULES OF CONSTRUCTION

23.1 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 which import the singular
connotation shall be interpreted as plural, and words which import the plural
connotation shall be interpreted as singular, as the identity of the parties or
objects referred to may require.

23.2 Unless expressly defined herein, words having well known technical or trade
meanings shall be so construed. All listing of items shall not be taken to be
exclusive, but shall include other items, whether similar or dissimilar to those
listed, as the context reasonably requires.

23.3 Except as set forth to the contrary herein, any right or remedy of Customer
or Qwest shall be cumulative and without prejudice to any other right or remedy,
whether contained herein or not.

23.4 This Agreement has been fully negotiated between and jointly drafted by the
parties.

23.5 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
Exhibit shall be corrected accordingly.

23.6 All actions, activities, consents, approvals and other undertakings of the
parties in this Agreement shall be performed in a reasonable and timely manner,
it being expressly acknowledged and understood that time is of the essence in
the performance of obligations required to be performed by a date expressly
specified herein. Except as specifically set forth herein, for the purpose of
this Article 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.

                                       16
<PAGE>

24. REPRESENTATIONS AND WARRANTIES

24.1 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, subject
            to bankruptcy, insolvency, creditors' rights and general equitable
            principles; and

      (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 of any country or any contract or other agreement the party
            is subject to.

25. PUBLICITY

25.1 No publicity regarding the existence and/or terms of this Agreement may
occur without Qwest's prior express written consent. Notwithstanding the
foregoing, however, Qwest agrees to issue a mutually acceptable joint press
release with Customer by January 14, 2000 addressing (i) the purchase of the
OC-48 Capacity hereunder; (ii) the co-location agreement hereunder; (iii) the
private peering relationship resulting therefrom; and (iv) the recognition by
Qwest of Customer as a significant worldwide provider of VOIP services. Qwest
shall allow senior management acceptable to Customer and available from Qwest to
be quoted in such press release.

26. ASSIGNMENT

26.1 This Agreement shall be binding on Customer and its respective affiliates,
successors, and assigns. Customer shall not assign, sell or transfer this
Agreement or the right to receive the granted Capacity hereunder, whether by
operation of law or otherwise, without the prior written consent of Qwest, which
consent shall not be unreasonably withheld; provided however that Customer shall
be entitled to assign the right to receive the granted Capacity hereunder to an
Affiliate so long as Customer remains ultimately responsible for all Customer
obligations hereunder. Any attempted assignment other than to an Affiliate of
Customer shall be null and void.

27. NO PERSONAL LIABILITY

27.1 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

                                       17
<PAGE>

corporate veil or otherwise seek to impose any liability relating to, or arising
from, this Agreement against any shareholder, employee, officer or director of
the other party. Each of such persons is an intended beneficiary of the mutual
promises set forth in this Article and shall be entitled to enforce the
obligations of this Article.

28. RELATIONSHIP OF THE PARTIES

28.1 The relationship between Customer and Qwest 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. Customer and Qwest, in performing any of their obligations hereunder,
shall be independent contractors or independent parties and shall discharge
their contractual obligations at their own risk.

29. SEVERABILITY

29.1 If any term, covenant or condition contained herein 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.

30. COUNTERPARTS

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

31. ENTIRE AGREEMENT; AMENDMENT

31.1 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. As of the Effective Date, the Prior Agreement shall terminate
without further liability to either party, and no obligations of either party
thereunder shall continue. The terms and conditions set forth in this Agreement
shall herewith control with respect to any IRU Capacity previously provisioned
under the Prior Agreement. The Appendices and 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.

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

                                       18
<PAGE>

                                        QWEST COMMUNICATIONS CORPORATION

                                        By: /s/ Greg Casey
                                        Name: Greg Casey
                                        Title: Senior VP of Wholesale Services

                                        PRIMUS TELECOMMUNICATIONS, INC.

                                        By: /s/ Yousef Javadi
                                        Name: Yousef Javadi
                                        Title: COO North America

                                       19
<PAGE>

                                   EXHIBIT A:
                     DESCRIPTION OF CUSTOMER IRU USER ROUTES
                           AND LOCATION OF QWEST POPS

I. IRU User Routes Provisioned Pursuant to the Agreement:

<TABLE>
<CAPTION>

----------------------------------------------------------------------------------------------------
   IRU     QWEST          QWEST         Capacity     V&H        IRU FEE           COLLOCATION
           POP A          POP B                     MILES
----------------------------------------------------------------------------------------------------
<S>      <C>            <C>            <C>         <C>       <C>                 <C>
    3     New York          Ft.           OC-3       1,068      *                       None
                         Lauderdale,
                            FL

<CAPTION>
----------------------------------------------------------------------------------------------------
    4     Los Angeles,   San Jose,        OC-12        307      *                     None
          California     California
----------------------------------------------------------------------------------------------------
<S>      <C>            <C>            <C>         <C>       <C>                <C>
    5      San Jose,      Denver,         OC-12        925      *               San Jose, California
           California    Colorado
----------------------------------------------------------------------------------------------------
    6      Denver,        Chicago,        OC-12        917      *                 Denver, Colorado
          Colorado        Illinois
----------------------------------------------------------------------------------------------------
    7     Chicago,       New York,        OC-12        709      *                 Chicago, Illinois
          Illinois       New York
----------------------------------------------------------------------------------------------------
    8    New York,       Washington,      OC-12        203      *                     None
         New York           D.C.
----------------------------------------------------------------------------------------------------
    9    Washington,      Dallas,         OC-l2       1180      *                     None
            D.C.          Texas
----------------------------------------------------------------------------------------------------
   10    Dallas, Texas      Los           OC-12       1239      *                 Dallas, Texas
                          Angeles,
                         California
----------------------------------------------------------------------------------------------------
   11    San Diego,         Los           OC-3         110      *                   San Diego
         California       Angeles,                                                  California
                         California
----------------------------------------------------------------------------------------------------
   12       San           San Jose,       OC-3                  *                    ??
          Francisco,     California
          California
----------------------------------------------------------------------------------------------------
   13    Boston, Mass.   New York,        OC-3         188      *                 Boston, Mass.
                         New York
----------------------------------------------------------------------------------------------------
   14      Seattle,      San Jose,        OC-3         715      *               Seattle, Washington
          Washington     California
----------------------------------------------------------------------------------------------------
</TABLE>
<PAGE>

II. IRU User Routes Previously Provisioned Under the Prior Agreement Being
Repurchased by Qwest Pursuant to the Agreement:

<TABLE>
<CAPTION>
----------------------------------------------------------------------------------------------------
   IRU     QWEST            QWEST POP          V&H           CAPACITY             IRU FEE
           POP A                B              MILES
----------------------------------------------------------------------------------------------------
<S>      <C>               <C>               <C>           <C>                  <C>
    1     New York,         Los Angeles,       2,441           OC-3              *
          New York           California
----------------------------------------------------------------------------------------------------
    2     New York,         Washington,          203           OC-3              *
          New York             D.C.
----------------------------------------------------------------------------------------------------
</TABLE>

                                        2
<PAGE>

           EXHIBIT B: TECHNICAL SPECIFICATIONS AND ACCEPTANCE TESTS

<PAGE>

* Confidential treatment has been requested in connection with this document.

                                       2
<PAGE>

* Confidential treatment has been requested in connection with this document.

                                       3
<PAGE>

* Confidential treatment has been requested in connection with this document.

                                       4
<PAGE>

                     EXHIBIT C: PAYMENT ALLOCATION SCHEDULE

For tax purposes only, the IRU Fee paid hereunder shall be allocated one
twentieth (1/20) per annual period beginning with the Effective Date.

                    EXHIBIT D: FORM OF COLLOCATION AGREEMENT

                          COLLOCATION LICENSE AGREEMENT

      This Collocation License Agreement ("License") is made and entered into as
of this __ day of ________, 1999, between Qwest Communications Corporation, a
Delaware corporation ("Licensor") and _____________________________________ a
_________ corporation ("Licensee").

                                    RECITALS

      A. Licensor is engaged in the business of providing customers with
networking and telecommunications services through its telecommunications
facility or facilities located at the addresses set forth in Exhibit A that is
attached hereto and incorporated herein by this reference (each of which is
referred to herein as a "Facility").

      B. Licensor is entitled to license the use of the Facility to other
telecommunications companies.

      C. Licensee desires to enter into a license agreement with Licensor for
the use of the Facility for the purpose of installing equipment and accessing
transmission capacity and operating its network, and Licensor desires to grant
to Licensee the right to use the Facility.

      NOW THEREFORE, in consideration of the following mutual exchange of
promises and covenants, the parties agree as follows;

1. GRANT OF LICENSE:

      (a) Subject to the terms and conditions contained herein, Licensor hereby
      grants to Licensee, as of the Commencement Date, a nonexclusive license to
      install, operate, and maintain certain communications equipment of
      Licensee in the Facility. In addition, Licensee shall have the exclusive
      use of the equipment space described in Exhibit A (the "Equipment Space").

      (b) Licensor hereby reserves all rights not specifically granted to
      Licensee, including, without limitation, the right to: (1) access to and
      use of the Facility for its own use and for the use of its agents and
      licensees; (2) grant additional licenses to other users; and (3) exercise
      or grant other rights not inconsistent with the rights granted hereunder.

      (c) This License is expressly made subject and subordinate to the terms
      and conditions of any underlying ground or facilities lease or other
      superior right by which Licensor has acquired its interest in the
      Facility. Licensee agrees to comply with any terms and conditions of such
      superior right. If the consent of the holder of such superior right is
      required in order for the parties to enter into this License, then this
      License shall not become effective until such consent is obtained.

      (d) This License does not include the provision of local access. Licensee
      must enter into separate agreements for local access, and for
      interconnection with any other user of a Facility. All such access and
      interconnections must be made through Licensor.

                                       5
<PAGE>

      (e) On not less than sixty (60) calendar days prior notice to Licensee,
      Licensor may relocate the Facility or all or any portion of the Equipment
      Space designated for Licensee's equipment. Following receipt of such
      notice, Licensee shall cooperate with Licensor in relocating Licensee's
      equipment, at Licensee's cost, to the new Facility or Equipment Space.

2.    TERM: This License shall be effective as of the Commencement Date (as
      defined below), and shall expire on the _________ anniversary of the
      Commencement Date, unless terminated earlier as provided for in this
      License. The foregoing notwithstanding, in no event shall the License be
      construed to extend beyond the term of the underlying lease or other
      superior interest in the Facility, or the termination date of the
      telecommunications services agreement between Licensor and Licensee that
      is applicable to Licensee's use of the Facility.

      In addition, either party shall have the right to terminate this License
      on not less than ninety (90) days advance notice to the other party.

      If for any reason Licensor does not deliver possession of the Equipment
      Space to Licensee on the Commencement Date, Licensor shall not be liable
      to Licensee for any resultant loss or damage, and the Commencement Date
      will be extended automatically one day for each day of delay before
      delivery of possession. Licensor and Licensee will execute a certificate
      of the Commencement Date promptly after delivery of possession.

3.    LICENSE FEES AND OTHER CHARGES: Licensee shall pay to Licensor as a
      license fee for use of the Equipment Space and the Facility a one-time
      nonrecurring charge and a monthly recurring charge in the amounts set
      forth in Exhibit A.

      Dark Fiber IRU. The nonrecurring charge shall be payable on the date that
      Licensee takes possession of the Equipment Space (the "Commencement
      Date"). The monthly recurring charge shall be payable in advance on the
      first day of each calendar month during the term of the License.

      Capacity IRU. The nonrecurring charge shall be payable on the date that
      any of the circuits that are dedicated to Licensee are turned up (the
      "Commencement Date"). The monthly recurring charge shall be payable in
      advance on the first day of each calendar month following the Commencement
      Date.

      If the term Commencement Date commences or ends on a day other than the
      first day of a calendar month, then the license fee for the month in which
      the term commences or ends shall be prorated (and paid at the beginning of
      the month) in the proportion that the number of days this License is in
      effect during such month bears to the total number of days in the month.
      If the monthly license fee is not paid when due, the amount due and
      payable shall bear interest at the rate of eighteen percent (18%) per
      annum from the date due until paid.

      In addition, Licensee shall pay to Licensor all costs incurred by Licensor
      in making modifications or improvements to the Facility for Licensee, or
      for fire suppression, energy sources or other utilities, and the costs of
      any work or service performed for, or facilities furnished to, Licensee to
      a greater extent or in a manner more favorable to Licensee than that
      performed for or furnished to others within the Facility.

4.    USE OF THE FACILITY: Licensee shall use the Facility solely for the
      purpose of installing, maintaining and utilizing the communications
      equipment and other personal property of Licensee installed in the
      Facility pursuant to the terms of this License for interconnection with
      the facilities of Licensor and the local exchange carriers that are
      present in the Facility on the Commencement Date, and for no other
      purpose. Licensee shall not use the Facility, or allow access thereto or
      use thereof, except in accordance with the terms of this License. Licensee
      shall not use the Facility for storage of equipment or for any
      administrative function.

                                       6
<PAGE>

      In its use of the Facility Licensee shall not interfere, or allow the
      operation of its equipment to interfere, with Licensor or any other
      occupant of the Facility.

      Except as otherwise provided herein, Licensee's equipment shall remain the
      sole property of Licensee. Licensee expressly disclaims any right, title,
      or interest in or to any of Licensor's equipment or property, or in that
      of any of Licensor's affiliates, customers, agents or licensees, whether
      located in the Facility or the Equipment Space, or elsewhere.

5.    ACCESS TO FACILITY:

      (a)   Shared Access. Where access to a Facility is shared with other
            users, or in the case of access to a cross-connect panel, Licensee
            shall be provided access to the Facility only when accompanied by a
            representative of Licensor. Licensee shall pay the following hourly
            charges for such access for each Qwest representative, for each hour
            or any part thereof:

            (1)   on business days, between the hours of 8:00 a.m. and 5:00 p.m.
                  local time, one hundred dollars ($100);

            (2)   on business days, between the hours of 5:00 p.m. and 8:00 am.,
                  and at any time on Saturdays, two hundred and twenty-five
                  dollars ($225); and

            (3)   on Sundays and legal holidays, three hundred dollars ($300).

      Licensee shall be charged for Licensor's travel time as part of the
      foregoing calculations. All individuals entering a Facility at the
      direction of Licensor shall at all time have appropriate identification,
      and shall display it to Licensor's representative on request.

      OPTIONAL:

      (a)   Separate Access. Where access to a Facility is not shared with other
            users, Licensee shall be responsible for security within its caged
            Space, and within and about its separate space.

      (b)   Scheduling. Licensor shall schedule all access to a Facility by
            telephone through Licensee's Access Control Center.

      (c)   Safety Training. All employees and contractors of Licensee who will
            enter upon any railroad right of way must successfully complete
            railroad safety training for the applicable railroad, at Licensee's
            expense.

6.    TAXES: Licensee shall be liable for and shall pay all taxes levied against
      the property owned by it and located on or about the Facility.

7.    ACCEPTANCE OF FACILITY: The installation of equipment by Licensee shall be
      conclusive evidence that Licensee accepts the Facility "as is," and that
      the Facility is suitable for the use intended by Licensee and is in
      satisfactory condition at the time the equipment was installed.

8.    MAINTENANCE OF PREMISES: Licensee at its own cost and expense, shall
      protect, maintain and keep in good order the Equipment Space and any
      equipment in the Equipment Space, and shall ensure that neither Licensee
      nor its agents, contractors or invitees damage any part of the Facility,
      the Equipment Space or any equipment located in or about the Facility, and
      shall not allow any debris or supplies to be left in or about the
      Facility. Licensee shall not maintain or permit any nuisances or
      violations of governmental laws, rules, regulations or ordinances with
      respect to the Facility. Licensee shall ensure that neither its employees,
      agents nor invitees shall permit any explosive, flammable or combustible
      material or any hazardous or toxic materials, as defined under state,
      federal or local laws or regulations, to be located in or about the
      Facility, except in compliance with all applicable laws and regulations.

                                       7
<PAGE>

9.    INSTALLATION AND ALTERATIONS:

      (a) Licensee shall notify Licensor before commencing any installation,
      interconnection, addition or alteration within or about the Facility, or
      undertake any installation, upgrade or modification to Licensee's
      equipment. Without the prior approval of Licensor, Licensee and shall not

            (1)   undertake any installation, interconnection, addition or
                  alteration within or about the Facility, or

            (2)   undertake any activity that would in any way result in an
                  increased cost to Licensor, or that might affect the use of
                  the Facility or other equipment by Licensor or any other user
                  of the Facility.

            Whenever Licensor's approval of work is required, Licensee shall
      deliver a written request to Licensor, specifying:

            (1)   the names and addresses of each proposed contractor and
                  subcontractor;

            (2)   a summary of the qualifications and experience of each
                  contractor and subcontractor;

            (3)   a description of the services to be performed; and

            (4)   the planned dates and times of such activities.

            Licensor shall have the right to disapprove or require the removal
      of any contractor or subcontractor selected for work in the Facility. All
      such approvals shall be valid only if given by Qwest's Vice President of
      Operations. If approval of any contractors or subcontractors is required
      by the terms of an agreement with a lessor or other party holding a
      superior interest in the Facility, Licensor shall also submit the written
      request to such other party for approval, and Licensee's use of
      contractors shall be subject to landlord's approval as set forth in the
      underlying lease.

      (b) All maintenance, installation, interconnection, addition, upgrade,
      modification or other alteration within the Facility, shall comply with
      all manufacturers' specifications, and shall meet all industry quality
      assurance standards (e.g. NEBS, IEEE, Bellcore).

      (c) Licensee shall pay or cause to be paid all costs and charges:

            (1)   for work done by Licensee or caused to be done by Licensee on
                  or about the Facility,

            (2)   for all materials furnished for or in connection with such
                  work;

            (3)   for alterations or additions to the Facility or equipment that
                  requires Licensor to incur costs; and

            (4)   all other costs or expenses incurred by Licensor arising out
                  of or related to that arise out of work done by or for the
                  benefit of Licensee.

      (d) Licensee shall indemnify Licensor against and hold Licensor and the
      Facility free and clear of and from all mechanics' liens and claims of
      liens, and all other liabilities, liens, claims and demands on account of
      such work done by or on behalf of Licensee. If any such lien is filed at
      any time against the Facility, or any part thereof, Licensee shall cause
      such lien to be discharged of record within ten (10) days after the filing
      thereof, except that if Licensee desires to contest such lien, it will
      furnish Licensor, within such ten-day period, security reasonably
      satisfactory to Licensor of at least 150% of the amount of the claim, plus
      estimated costs and interest. If a final judgment establishing the
      validity or existence of a lien for any amount is entered, Licensee shall
      pay and satisfy the same without delay. If Licensee fails to pay any
      charge for which a mechanics' lien has been filed, and has not given
      Licensor security as described above, Licensor may, at its option, pay
      such charge and related costs and interest, and the amount so paid,
      together with reasonable attorneys' fees incurred in connection with such
      lien, will be immediately due

                                       8
<PAGE>

      from Licensee to Licensor. Nothing contained in this License shall be
      deemed to constitute a consent or agreement of Licensor to subject the
      Facility to liability under any mechanics' or other lien law. If Licensee
      receives notice that a lien has been or is about to be filed against the
      Facility, or any action affecting title to the Facility has been commenced
      on account of work done by or on behalf of, or materials furnished to or
      for Licensee, it will immediately give Licensor notice of such occurrence.
      At least fifteen (15) days before commencement of any work (including but
      not limited to any maintenance, repairs, alterations, additions,
      improvements or installations) in or to the Facility or the Equipment
      Space by or for Licensee, Licensee will give Licensor notice of the
      proposed work and the names and addresses of the persons supplying labor
      and materials for the proposed work. Licensor shall have the right to post
      notices of nonresponsibility or similar notices on the Facility in order
      to protect the Facility against any such liens.

10.   RULES AND REGULATIONS: Licensee shall at Licensee's own cost and expense,
      comply with all federal, state, and local laws, rules, regulations,
      ordinances and requirements, whether now in force or hereinafter enacted,
      relating to Licensee's use of the Facility. Licensee will obtain all
      required permits and licenses pertaining to the installation, operation,
      maintenance and repair of its equipment in the Facility. In addition,
      Licensee agrees to comply with all rules and regulations of Licensor and
      the holder of any superior lease or other superior right that pertains to
      use of the Facility or the Equipment Space.

11.   WAIVER OF LIABILITY; INDEMNIFICATION: Licensor and Licensee hereby agree
      that:

      (a) Except as provided in subsection 11(b), neither party shall be liable
      to the other party, and each party hereby releases and waives all claims
      against the other party, for any injury or damage arising from
      interruption of service or power, except to the extent caused by the gross
      negligence or intentional misconduct of the other party or its employees,
      agents or contractors. NOTWITHSTANDING ANY PROVISION OF THIS AGREEMENT TO
      THE CONTRARY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER PARTY FOR ANY
      SPECIAL, INCIDENTAL, INDIRECT, SPECIAL, EXEMPLARY OR PUNITIVE, LOSS OF
      PROFITS OR CONSEQUENTIAL DAMAGES, WHETHER FORESEEABLE OR NOT, ARISING OUT
      OF, OR IN CONNECTION WITH, SUCH PARTY'S FAILURE TO PERFORM ITS
      OBLIGATIONS, OR A BREACH OF ITS REPRESENTATIONS HEREUNDER, INCLUDING, BUT
      NOT LIMITED TO, LOSS OF PROFITS OR REVENUE, COST OF REPLACEMENT SERVICES
      (WHETHER ARISING OUT OF TRANSMISSION INTERRUPTIONS OR PROBLEMS, ANY
      INTERRUPTION OR DEGRADATION OF SERVICE OR OTHERWISE), OR CLAIMS OF
      CUSTOMERS. ALL CLAIMS WITH RESPECT TO WHICH SUCH SPECIAL, INCIDENTAL,
      INDIRECT, PUNITIVE OR CONSEQUENTIAL DAMAGES ARE HEREBY SPECIFICALLY
      WAIVED.

      LICENSEE EXPRESSLY ACKNOWLEDGES THAT LICENSOR INTENDS TO ALLOW OTHER
      LICENSEES TO INSTALL EQUIPMENT IN THE FACILITY. LICENSEE EXPRESSLY AGREES
      THAT LICENSOR SHALL HAVE NO LIABILITY FOR ANY DAMAGES, COSTS, OR LOSSES
      INCURRED BY LICENSEE CAUSED BY SUCH OTHER LICENSEES' ACTS, EQUIPMENT, OR
      FAILURE TO ACT.

      (b) Licensee agrees to indemnify and hold harmless and defend Licensor,
      its employees, contractors, and agents from and against any and all
      demands, claims, causes of action, fines, penalties, damages (including
      consequential damages), losses, liabilities, judgments, and expenses
      (including without limitation attorneys fees and court costs) incurred in
      connection with or arising from:

            (1)   the use or occupancy of the Facility by Licensee or any person
                  claiming under Licensee;

                                       9
<PAGE>

            (2)   any activity, work, or thing done or permitted by Licensee in
                  or about the Facility;

            (3)   any acts, omissions, negligence or willful misconduct of
                  Licensee or any person claiming under Licensee, or the
                  employees, agents, contractors, invitees, licensees or
                  visitors of Licensee;

            (4)   any breach, violation, or nonperformance by Licensee or any
                  person claiming under Licensee or the employees, agents,
                  contractors, invitees, licensees or visitors of Licensee of
                  any term, covenant, or provision of this License, or any law,
                  statute, ordinance or governmental requirement of any kind; or

            (5)   except for loss that is proximately caused by or results
                  proximately from the negligence of Licensor, any injury or
                  damage to the person, property, or business of Licensee, its
                  employees, agents, contractors, invitees, licensees, visitors,
                  or any other person entering the Facility under the express or
                  implied invitation of Licensee.

            If any action or proceeding is brought against Licensor, its
            employees, contractors or agents by reason of any such claim,
            Licensee shall, on notice from Licensor, defend the claim at
            Licensee's expense with counsel reasonably satisfactory to Licensor.
            The obligations of this section shall survive the expiration or
            other termination of this License.

12.   INSURANCE:

      (a) During the term of this License, Licensee shall, at Licensee's sole
      cost and expense, keep in full force and effect the following insurance:

            (1) standard form property insurance insuring against the perils of
      fire, vandalism, malicious mischief, extended coverage ("all-risk") and
      sprinkler leakage. This insurance policy shall be on all property owned by
      Licensee, or for which Licensee is legally liable, or that was installed
      at Licensee's request, and which is located in the Facility, in an amount
      not less than its full replacement cost. If there is a dispute about the
      amount which comprises full replacement cost, the decision of Licensor
      shall be conclusive.

            (2) commercial general liability insurance insuring Licensee against
      any liability arising out of the license, use occupancy or maintenance of
      the Facility and all areas appurtenant thereto. Such insurance shall be in
      the amount of $2 million ($5 million on railroad right of way) combined
      single limit for injury to or death of one or more persons in an
      occurrence, and for damage to tangible property (including loss of use) in
      an occurrence. The policy shall insure the hazards of the Facility and
      Licensee's operations thereon, independent contractors, contractual
      liability (covering the indemnity of Licensee contained in this License),
      and shall (a) list Licensor as an additional insured, (b) contain a cross
      liability provision, and (c) contain a provision that the insurance
      provided to Licensor hereunder shall be primary and noncontributing with
      any other insurance available to Licensor.

            (3) workers compensation as required by applicable state law, and
      employer's liability insurance with minimum limits of $1,000,000 per
      occurrence. If the Facility is located in a "monopolistic" state, Licensee
      shall carry "stop gap" coverage with minimum limits of $1,000,000 per
      occurrence.

            (4) business automobile insurance in an amount not less than
      $1,000,000 per occurrence covering all autos used at the Facility,
      including owned, non-owned and hired autos.

                                       10
<PAGE>

      (b) All the insurance required of Licensee under this Agreement shall: (1)
      be issued as a primary policy by an insurer with an A M Best rating of VII
      or better, (2) contain an endorsement requiring sixty (60) days written
      notice from the insurance company to both parties before cancellation or
      material reduction in the coverage, scope or amount of any policy. Each
      liability insurance policy shall list Licensor, its, officers, directors
      and employees as additional insureds and loss payees. Each policy, or a
      certificate of the policy acceptable in form and content to Licensor,
      shall be deposited with Licensor within thirty (30) days after execution
      of this Agreement and on renewal of the policy not less than thirty (30)
      days after expiration of the initial term of the policy.

      (c) Anything in this License to the contrary notwithstanding, Licensor and
      Licensee each waives all rights of recovery, claim, action or cause of
      action against the other, its agents (including partners, both general and
      limited), trustees, officers, directors, agents and employees, for any
      loss or damage that may occur to the Facility, or any improvements
      thereto, or any property of such party therein, arising from any cause
      covered by any insurance carried by such party, including negligence of
      the other party. Licensor and Licensee shall cause their respective
      insurers to issue appropriate waiver of subrogation rights endorsements to
      all insurance policies carried in connection with the Facility or the
      contents.

13.   ASSIGNMENT AND SUBLICENSING: Licensor may freely assign this License.
      Licensee shall not sell, assign, pledge, encumber or otherwise transfer by
      operation of law or otherwise all or any part of Licensee's rights or
      obligations under this License, nor permit any other person to occupy or
      use the Facility or any portion thereof, without first obtaining
      Licensor's prior written consent, which consent may be withheld in
      Licensor's sole discretion. Licensee shall notify Licensor sixty (60) days
      prior to the effective date of any proposed assignment of its intention to
      assign this License. Any attempted sale, assignment, encumbrance or other
      transfer of all or any part of this License by Licensee shall be void and
      shall constitute a breach of this License.

14.   SERVICES PROVIDED BY LICENSOR: Licensor shall make available the following
      services for Licensee's use of the Equipment Space:

      (a) HVAC sufficient to maintain an ambient temperature of 50(degrees)F to
      86(degrees)F and relative noncondensing humidity.

      (b) AC power consisting of commercial, unprotected and interruptible 120
      volt, 20 amp each, single phase, duplex outlets, for testing of equipment
      only.

      (c) Except as otherwise specified in Exhibit A, DC power consisting of
      fused 30 amp A supply and fused 30 amp B supply, negative 48 volts, for
      each rack.

      (d) Fire suppression system, either sprinkler system or other system that
      conforms with local, state, and federal laws and regulations.

      (e) Battery reserve, as is available to Licensor.

      (f) Grounding.

      Installation of Licensee's equipment shall be performed in accordance with
      Licensor's installation policies and specifications. Licensee shall
      supply the fiber, cable and the equipment that will be installed on the
      shelves. For cable terminations, all connectors shall be compatible with
      BNC connectors. For fiber terminations, all connectors shall be standard
      EC connectors. Licensor will perform the interconnection between
      Licensor's and Licensee's equipment. All services shall be provided at the
      Facilities and under the direction and instruction

                                       11
<PAGE>

      of Licensee's personnel, and Licensee accepts sole responsibility for
      services performed by Licensor.

      LICENSOR SHALL HAVE NO DUTY TO MONITOR, MAINTAIN, OR CARE FOR THE
      EQUIPMENT INSTALLED BY OR FOR LICENSEE.

15.   TERMINATION IN THE EVENT OF CASUALTY OR CONDEMNATION: In the event of any
      damage, destruction or condemnation of the Facility that renders the
      Facility unusable or inoperable, Licensor shall have the right to
      terminate this License and all of its duties and obligations hereunder by
      giving notice to Licensee within thirty (30) days after such damage,
      destruction or condemnation.

16.   SURRENDER OF THE PREMISES: Within fifteen (15) days of expiration or
      earlier termination of this License, Licensee shall remove its equipment
      from the Facility at Licensee's expense. Licensee shall surrender the
      Equipment Space in good condition, reasonable wear and tear excepted. If
      Licensee fails to remove its equipment and other personal property from
      the Facility within thirty (30) days after the date of expiration or other
      termination, Licensor may remove such items at Licensee's sole cost and
      expense.

      In addition, upon expiration or other termination of this License for any
      reason, Licensee shall, at its sole cost and expense, remove all
      alterations, additions and improvements made or installed by Licensee and
      restore the Facility to the same or as good condition as existed as when
      Licensee first installed equipment, reasonable wear and tear excepted.

17.   EVENTS OF DEFAULT:

      (a) The occurrence of any one or more of the following events shall
      constitute a default and breach of this License by Licensee ("Events of
      Default"):

            (1) Licensee's failure to pay when due any recurring monthly license
      fees and charges, initial installation charges, or other amounts.

            (2) The installation by Licensee of any equipment in the Facility
      without first obtaining Licensor's consent.

            (3) Licensee's vacation or abandonment of a Facility.

            (5) Interference by Licensee with Licensor or any other user of a
      Facility that continues for four (4) hours following notice from Licensor.

            (6) A transfer or assignment by Licensee of its interest in this
      License, except as specifically permitted by the terms of this License.

            (7) Licensee's failure to relocate Licensee's equipment in
      accordance with section 1(e).

            (8) Licensee's failure to perform or observe any other term,
      covenant or condition of this License, if the failure continues for thirty
      (30) days after notice has been given to Licensee.

      (b) Upon the occurrence of any Event of Default, Licensor may, without
      notice or demand and in addition to any other right or remedy available at
      law or equity, terminate this License and remove all of Licensee's
      equipment from the Facility and store the same at Licensee's expense.
      Licensee hereby waives any damages occasioned by such removal. Any
      equipment so removed will be returned to Licensee upon payment in full of
      all storage costs, past due license fees and charges. If within thirty
      (30) days following such equipment removal, Licensee has not requested the
      return

                                       12
<PAGE>

      of its equipment and paid any sums owed, then Licensor may exercise all
      rights of ownership over such equipment including the right to sell same
      and retain possession of any sale proceeds. Licensor's exercise of any
      remedies provided for in this section shall be without prejudice to any
      other remedies Licensor may have provided for herein or by law.

18.   FORCE MAJEURE: Should the performance of any act required by this License,
      other than the payment of money, be prevented or delayed by reason of an
      act of God, strike, lockout, labor troubles, inability of Licensor to
      secure materials necessary to provide the services, restrictive
      governmental laws or regulations, or any other cause beyond the control of
      the party required to perform the act, the time for performance will be
      extended for a period equivalent to the period of delay and performance of
      the act during the period of delay will be excused.

19.   GOVERNING LAW: This License shall be governed by and construed in
      accordance with the laws of the State of New York.

20.   INTERPRETATION: Licensor and Licensee hereby expressly agree that this
      License constitutes a mere license and not an interest in the Facility.

21.   WAIVER: No waiver by Licensor of any default or breach of Licensee's
      performance of any term, condition or covenant of this License shall be
      deemed to be a waiver of any subsequent default or breach by Licensee of
      the same or any other term, condition or covenant contained in this
      License.

22.   NOTICES: All notices required or permitted by this License shall be in
      writing and delivered by hand, courier, overnight delivery service or
      registered or certified mail return receipt requested. Any notice or other
      communication under this License shall be deemed given when received or
      refused and shall be directed to the following addresses:

            (a) If to Licensor:

                        Qwest Communications Corporation
                        555 17th Street, 7th Floor
                        Denver, Colorado 80202
                        Attention: Vice President, Transport Engineering

                        with copies to:

                        Qwest Communications Corporation
                        555 17th Street, 7th Floor
                        Denver, Colorado 80202
                        Attention: Contracts Manager, Field Operations

                        And:

                        Qwest Communications Corporation
                        555 17th Street, 7th Floor
                        Denver, Colorado 80202
                        Attention: General Counsel

            (b) If to Licensee:

                        ____________________________________________
                        ____________________________________________
                        ____________________________________________
                        Attention: _________________________________

                                       13
<PAGE>

      In addition, Licensor may give Licensee notice of potential interruption
      of or interference with service under section 17(a)(5) by electronic
      delivery at the following internet address: www.changeman@qwest.com.

      Licensor's Access Control Center: (888) 345-4762.

      Licensee's Access Control Center: ________________

      Either party may change its address for purposes of this section by notice
      similarly given.

23.   TERMS AND HEADINGS: The section titles of this License shall have no
      effect upon the construction or interpretation of any part hereof.

24.   SUCCESSORS: This License shall inure to the benefit of and be binding on
      the parties, and their heirs, successors, assigns and legal
      representatives, but nothing contained in this section shall be construed
      to permit an assignment or other transfer except as specifically provided
      herein.

25.   SEVERABILITY: Any provision of this License which shall prove to be
      invalid, void or illegal shall in no way affect, impair or invalidate any
      other provision hereof and the remaining provisions hereof shall remain in
      full force and effect to the greatest extent permitted by law.

26.   RULES AND REGULATIONS: Licensee and its employees, agents and invitees
      shall abide by and observe all reasonable rules and regulations as may be
      promulgated by Licensor or Licensor's lessor for the maintenance and use
      of the Facility. Notice of the rules and regulations will be posted or
      provided to Licensee. Licensor may periodically amend or supplement the
      rules and regulations at its sole discretion.

27.   AMENDMENT AND MODIFICATION: This License may be amended, changed or
      modified only by an instrument in writing signed by duly authorized
      representatives of the parties hereto. Licensee expressly agrees to
      execute any amendment to this License which may be required by a holder of
      a superior interest in the Facility, which does not materially and
      adversely affect Licensee's rights under this License, within fifteen (15)
      days of a written request by Licensor or Licensor may terminate this
      License on notice to Licensee.

28.   ATTORNEYS' FEES: If either party commences an action against the other
      party arising out of or concerning this License, the prevailing party in
      such litigation shall be entitled to reasonable attorneys fees and costs
      in addition to such other relief as may be awarded.

29.   ENTIRE AGREEMENT: This License contains all of the agreements of the
      parties concerning the Facility, and there are no spoken or other
      agreements that modify or affect this License. This License supersedes any
      and all prior agreements made or executed by or on behalf of the parties
      hereto regarding the Facility.

30.   CONFIDENTIALITY: The parties agree that this License is and shall be kept
      confidential. Neither party shall divulge or otherwise disclose any of the
      provisions of this License to any third party without the prior written
      consent of the other party, except that either party may make disclosure
      to those required for the implementation of this License, and to customers
      and prospective customers, purchasers and prospective purchasers,
      auditors, attorneys, financial advisors, lenders and prospective lenders,
      investors and prospective investors, provided that in each case the
      recipient agrees in writing to be bound by the confidentiality provisions
      set forth in this section. In addition, either party may make disclosure
      as required by a court order or as otherwise required by law or in any
      legal or arbitration proceeding relating to this License. If either party
      is required by law or by interrogatories, requests for information or
      documents, subpoena, civil investigative demand or similar process to
      disclose the provisions of this License, it will provide the other party
      with prompt prior notice of such request or requirement so that such party
      may seek an appropriate protective order and/or waive compliance with this
      Section. The

                                       14
<PAGE>

      party whose consent to disclose information is requested shall respond to
      such request, in writing, within five (5) working days of the request by
      either authorizing the disclosure or advising of its election to seek a
      protective order, or if such party fails to respond within the prescribed
      period the disclosure shall be deemed approved.

      In addition, Licensee shall submit to Licensor all news releases,
      advertising and other publicity material related to this License wherein
      Licensor's name is mentioned or language is used from which a connection
      to Licensor's name therein may, in Licensor's judgment, be inferred or
      implied. Licensee shall neither publish nor use such material nor use
      Licensor's name, without the prior written consent of Licensor.

      IN WITNESS WHEREOF, the parties have executed this License the date first
      above written.

                                        Licensor: Qwest Communications
                                          Corporation

                                        By:_____________________________________
                                        Name:___________________________________
                                        Title:__________________________________
                                        Date:___________________________________

                                        Licensee:_______________________________

                                        By:_____________________________________
                                        Name:___________________________________
                                        Title:__________________________________
                                        Date:___________________________________

                                       15
<PAGE>

                              COLLOCATION AGREEMENT

                                    EXHIBIT A

    LOCATION OF THE FACILITY

            REQUEST NO.                        RESERVATION NO.

                               THE EQUIPMENT SPACE

            Number of bays/racks:
            Dimensions of each bay/rack:       23" by 19" and seven feet tall
            Space Type:                        Common

            DC Power Requirements:

                   Voltage:________________________
                   Total amperage:                 A&B Feeds Required:

                   Number Of Breakers Needed (per feed):

                   20 amp:              30 amp:               40 amp:
                   50 amp:              60 amp:              l00 amp:
                   Other:

            Signal Interface (Choose One):

                   Dark Fiber:   |_|           Connection:
                   Optical:      |_|           Type:
                   Electrical:   |_|           Bit Rate:

            Notes, Special Requirements:

                         LICENSE FEES AND OTHER CHARGES

            A One-time Nonrecurring Charge ("NRC") of $2500.00 per rack.

            A Monthly Recurring Charge ("MRC") of $1500.00 per rack (up to 30
            amps of DC power per rack included in the MRC).

            An additional monthly recurring charge of $10 per amp of DC power
            per rack (provided in 10 amp increments) for power furnished above
            30 amps per rack.

                                       16
<PAGE>

            OPTIONAL CLAUSES:

            In addition, Licensor may give Licensee notice of the availability
            or interruption of the services described in section 3, or a planned
            maintenance, by electronic delivery at all of the following internet
            addresses:

                    __________________________
                    __________________________
                    __________________________

            and Licensee may give Licensor notice of rejection of a rack by
            electronic delivery at the following internet address:

                    ______________(a)qwest.net

            In the case of an emergency, Licensor may notify Licensee either
            through the Internet addresses set forth above, or at the following
            telephone numbers:

            Primary Telephone Number:        (703) 265-4662
            Alternate Telephone Number:      (703) 265-4667

                                   EXHIBIT __
                   AMENDMENT TO COLLOCATION LICENSE AGREEMENT

      This Amendment to the Collocation License Agreement ("Amendment") is
entered into as of the ____ day of________, 199_ or 200_, by and between Qwest
Communications Corporation ("Licensor"') and _________________ (the "Licensee").

                                    Recitals

      A.    The parties entered into that certain Collocation Agreement dated
            _________________ (the "Master Agreement").

      B.    By the terms of the Master Agreement, Licensee is entitled to
            increase the number of bays dedicated for its use at certain
            Facilities that are subject to the Master Agreement.

      C.    Licensee has elected to increase the number of bays at certain
            Facilities, and Licensor and the Licensee wish to amend the Master
            Agreement to include additional bays.

                                Additional Terms

      In consideration of the foregoing and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged,
Licensor and Licensee agree as follows:

      1. Defined Terms. Unless otherwise defined herein, all capitalized terms
used herein shall have the meanings given to them in the Agreement.

      2. The Bays. Exhibit A of the Master Agreement is hereby amended to
include the following additional bays:

Address of Facility                Number of Bays Dedicated to Licensee's Use

                                       17
<PAGE>

      3. Confirmation of Agreement. Licensor and Licensee confirm and ratify in
all respects the terms and conditions of the Agreement, as amended by this
Amendment.

            Licensor and Licensee have executed this Amendment effective as of
the day first written above.

___________________________________     Qwest Communications Corporation

By:________________________________     By:_____________________________________
Name:______________________________     Name:___________________________________
Title:_____________________________     Title:__________________________________
Date:______________________________     Date:___________________________________

Additional Space.

Licensor may offer to license to Licensee additional Equipment Space in
Licensor's Facilities on the terms and conditions of this License. If Licensee
accepts such offer, within ten (10) days following acceptance of Licensor's
offer, the parties shall execute an amendment to Exhibit A of this License. The
amendment shall be in the form attached hereto as Exhibit __. The Term of the
license for the Equipment Space shall be as set forth in Exhibit A.

Option to Renew.

Licensor grants to Licensee the right and option to extend the Term for an
additional _____ years (the "Renewal Term"). Licensee shall notify Licensor of
its election to extend this License for the Renewal Term not later than six (6)
months before the expiration date of the then existing Term. License's failure
to exercise the option in a timely manner shall cause such option to extinguish
automatically, time being of the essence. The Renewal Term shall be upon all of
the terms, covenants, and conditions of this License.

Permitted Assignments

Notwithstanding anything contained in this License to the contrary, Licensee
may, without the prior consent of Licensor, assign this License to any company
into which Licensee may be merged or consolidated, or that acquires
substantially all of the assets of Licensee.

                                       18
<PAGE>

                    EXHIBIT D: FORM OF COLLOCATION AGREEMENT

                                       19

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