Document:

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                                                                  Exhibit 10.27

                           PRIMARY SUPPLIER AGREEMENT

         THIS PRIMARY SUPPLIER AGREEMENT, dated as of January 18, 2000 (as
amended, supplemented or otherwise modified from time to time, this
"AGREEMENT"), between FLAG TELECOM HOLDINGS LIMITED, a company organized and
existing under the laws of Bermuda and having its principal office in Hamilton,
Bermuda (said company, and any permitted successor or assign hereunder, the
"GRANTOR"), and BELL ATLANTIC GLOBAL SYSTEMS COMPANY, a corporation organized
and existing under the laws of Delaware and having its principal office in New
York, New York (said company, and any permitted successor or assign hereunder,
the "PURCHASER"). The Grantor and the Purchaser are herein sometimes
collectively referred to as the "PARTIES" and individually referred to as a
"Party".

                              W I T N E S S E T H:

         WHEREAS, an Affiliate of the Grantor has constructed a 10 gigabit per
second undersea fiber optic cable system connecting the United Kingdom with
Japan (the "FLAG Europe-Asia System"); an affiliate of Grantor is constructing,
through a 50/50 joint venture with GTS TransAtlantic Holdings, Ltd. ("GTS"), a
fiber optic cable system connecting London, UK and Paris, France to New York,
New York with initial fully redundant capacity of at least 160 gigabits per
second, and with potential for future upgrade to 2.4 terabits per second (the
"FLAG Atlantic-1 System"); the Grantor has terrestrial connectivity between its
landing stations in the United Kingdom and Spain to the city centers of London
and Madrid and the Grantor has acquired the right to obtain through contractual
arrangements with other facilities based bandwidth capacity providers
intra-European connectivity from London to Paris, Brussels, Frankfurt, Amsterdam
and other major European metropolitan areas (the "European Terrestrial System");
and

         WHEREAS, the FLAG Europe-Asia System, the FLAG Atlantic-1 System, and
the European Terrestrial System are referred to herein individually as a
"System" and collectively as the "FLAG Network"; and

         WHEREAS, Grantor may in the future construct or acquire other
terrestrial and undersea fiber optic cable systems in which case such additional
systems will be deemed to be a "System" and part of the FLAG Network under this
Agreement; and

         WHEREAS, the Purchaser desires to acquire rights with respect to
Capacity on the FLAG Network;

         NOW, THEREFORE, the Parties, in consideration of the mutual covenants
contained herein, and for other good and valuable consideration, the receipt of
which is hereby acknowledged, covenant and agree with each other as follows:

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1.       DEFINITIONS

         Unless otherwise defined herein, all terms which are commonly used in
         the telecommunications industry shall have the meanings commonly given
         such terms in such industry. In addition to terms defined in the
         preamble, the recitals and in the text of this Agreement (which shall
         have their assigned meanings when used herein), the following terms
         shall have the following meanings:

         "AFFILIATE" (Purchaser) means, at any time, any United States domestic
         Person, (excluding Puerto Rico and the Northern Mariana Islands) that
         at such time, directly or indirectly through one or more
         intermediaries, Controls, or is Controlled by, or is under common
         Control with Purchaser.. As used in this definition, "Control" means
         the ability to direct the purchasing decisions of such Person. Where
         10% or more of a Person's voting or equity interests are directly or
         indirectly held by Purchaser, its parent company, subsidiary or
         Affiliate, and such Person is not an Affiliate of Purchaser, such
         Person will have the option but not the obligation to purchase Capacity
         under this Agreement. Should such Person determine to purchase Capacity
         under this Agreement, such Person's Capacity Requirements after the
         opt-in date would then be counted towards determining the Minimum Bell
         Purchase Requirement. Such Person who opts in shall be treated as an
         Affiliate of Purchaser for purposes of this Agreement and shall be
         subject to all terms of this Agreement binding on Purchaser.

         "Affiliate" (Grantor) means, at any time, and with respect to any
         Person, any other Person that at such time, directly or indirectly
         through one or more intermediaries, Controls or is Controlled by, or is
         under common Control with Grantor. As used in this definition,
         "Control" means the possession, directly or indirectly, of the power to
         direct or cause the direction of the management and policies of a
         Person, whether through the ownership of voting securities, by contract
         or otherwise.

         "APPLICABLE ROUTE" means any specific route served by the FLAG Network.

         "CAPACITY" means undersea facilities based communications capacity in
         any fiber optic cable, including any terrestrial backhaul circuits
         required as part of the System design.

         "CAPACITY REQUIREMENTS" means a Purchase or Purchases by Purchaser
         and/or any Affiliate of Purchaser, of Capacity on any Applicable Route,
         PROVIDED, HOWEVER, that Capacity Requirements shall not include (a)
         Capacity that is provided through the Purchaser's and its Affiliates'
         wholly owned facilities, (b) Capacity that is provided through
         facilities that are not wholly owned by Purchaser (e.g. a consortium
         cable) but on which Purchaser or its Affiliates have acquired rights
         including upgrade rights prior to the date hereof or the Affiliate opt
         in date, whichever is later for such Affiliate, (c) Capacity that is
         provided through any facilities or rights in facilities including
         upgrade rights thereto that are owned by any Person or its Affiliates
         at the time that such Person is

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         acquired by or merged with the Purchaser (but only to the extent such
         facilities or rights to facilities were acquired by such Person or its
         Affiliates prior to the completion of the acquisition or merger), (d)
         Purchases of Capacity made by any Person acquired by or merged with the
         Purchaser, including any associated upgrade rights, (but only to the
         extent that the Commitment Date for the initial Purchase of Capacity
         occurred prior to the completion of the acquisition or merger), (e)
         services, including but not limited to switched and/or dedicated
         services or international minutes of use, purchased from persons other
         than Grantor or Purchaser and/or their Affiliates, for internal use or
         resale to other persons by Purchaser, and (f) those circumstances where
         Grantor is unable to provide undersea facilities sufficient to meet
         Purchaser's reasonable service and ready-for-service date requirements,
         including the specific route on which Purchaser wishes to secure
         Capacity.

         "CAPACITY REQUIREMENTS ATTRIBUTABLE TO ANY COMMITMENT YEAR " means all
         Capacity Requirements with a Commitment Date during such Commitment
         Year.

         "COMMITMENT DATE" means, with respect to any Capacity Requirement, the
         date that Purchaser shall have signed, or otherwise becomes bound
         under, a capacity purchase agreement or, in the case of any exercise of
         any option or right to obtain additional Capacity pursuant to an
         existing capacity purchase agreement, the date of such exercise.

         "COMMITMENT YEAR" means each calendar year during the Minimum Capacity
         Period.

         "CPA" means any written agreement between the Purchaser and any of its
         Affiliates and Grantor or any of its Affiliates providing for the
         purchase, lease or other acquisition of any Interest in Capacity to
         meet the Minimum Bell Purchase Requirement.

         "DOLLARS" or "$" means United States dollars.

         "FLAG COST" means the capitalized cost of constructing each System
         divided by the Capacity provided by that System, and, in the case of a
         non point-to-point system (e.g. the FLAG Europe-Asia System, not the
         FLAG Atlantic-1 System), divided by the then current estimate of the
         maximum potential fill rate of the System. Where Grantor or an
         Affiliate acquires Capacity from other Providers (including for this
         purpose affiliates Grantor does not control), FLAG Cost means the price
         Grantor pays to acquire the amount of Capacity requested by Purchaser.
         After any System has been upgraded, FLAG Cost shall be recalculated as
         follows:

                  (a) Where Purchaser has made a Purchase commitment for any
         System before the date of financial closure of that System (a "Founding
         Purchaser Commitment"), and for an amount of additional Capacity equal
         to the Capacity purchased in the Founding Purchaser Commitment in
         proportion to the percentage increase in the Capacity of the System on
         an upgrade, FLAG Cost means the incremental capitalized cost of the
         upgrade divided by the incremental Capacity provided by the upgrade.

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                  (b) In all other cases, FLAG Cost means the capitalized cost
         of the System plus the capitalized cost of all upgrades up to the date
         of the Purchase divided by the Capacity of the System at the date of
         the Purchase and, in the case of a non point-to-point system (e.g. the
         FLAG Europe-Asia System, not the FLAG Atlantic-1 System), divided by
         the then current estimate of the maximum potential fill rate of the
         System.

         For the purposes of this definition, capitalized cost shall include all
         relevant costs relating to the design, development, financing,
         construction and bringing into service of each System, including all
         relevant costs of technical infrastructure, program management, finance
         charges (including bank fees), licenses and permits, and other related
         costs. FLAG Cost shall not include sales and general administrative
         costs. Purchaser and its Affiliates shall have the right to audit FLAG
         Cost upon reasonable notice to Grantor.

         "INTEREST IN CAPACITY" means any ownership interest in or right to use
         Capacity (including, without limitation, by way of lease or
         indefeasible right of use).

         "MINIMUM CAPACITY PERIOD" shall mean the four-year period commencing on
         1 January 2000.

         "MINIMUM BELL PURCHASE REQUIREMENT" means, for each Commitment Year,
         50% of the Capacity Requirements. Except as otherwise provided herein,
         Purchaser shall have the option, but not be obligated, to make
         Purchases of Capacity on any FLAG terrestrial system and have those
         purchases applied towards the Minimum Bell Purchase Requirement. Except
         as otherwise provided herein, Purchaser's aggregate global subsea
         Capacity Requirements may be met by making capacity purchases on any
         one System or a combination of Systems. The calculation of the Minimum
         Bell Purchase Requirement shall be in STM-1 equivalents. In the case of
         a purchase of non-specific capacity (e.g. a fiber pair) the number of
         STM-1 equivalents shall be derived by reference to the number of STM-1s
         available within such non-specific capacity in the Commitment Year.

         "PERSON" means any natural person, corporation, limited liability
         company, trust, joint venture, association, company, consortium,
         partnership, governmental authority or other entity.

         "PREVAILING CURRENT MARKET PRICE" means, with respect to any Capacity,
         the lowest market price generally available at the time such Capacity
         is committed, for a like amount of substantially similar Capacity
         (which such similarities shall include substantially similar
         geographical route, timing, restoration capabilities and quality) but
         shall exclude Capacity that is being sold at prices materially below
         what would be attributable to supply and demand factors in a
         competitive marketplace. The calculation of Prevailing Current Market
         Price shall consider, among other things, consortium cable pricing,
         including initial party and upgrade prices when being compared to the
         initial founding investor price on a System and IRU pricing for other
         purchases.

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         "PROVIDER" means any Person who provides an Interest in Capacity.

         "PURCHASE OF CAPACITY" means any purchase, lease or other acquisition
         of an Interest in Capacity by Purchaser, whether such Interest in
         Capacity is acquired for cash, on credit or in exchange for
         non-monetary assets.

         "TERMINATION DATE" means the date on which this Agreement is
         terminated.

2.       MINIMUM CAPACITY COMMITMENT AND PROVISIONING

                  (a) The Purchaser hereby agrees to purchase from Grantor and
         its Affiliates, during each Commitment Year, Interests in Capacity
         equivalent to the Minimum BELL Purchase Requirement. The Parties agree
         that any of Purchaser's Capacity Requirements in excess of the Minimum
         BELL Purchase Requirement may be acquired by the Purchaser from other
         Providers.

                  (b) Purchaser will pay for the Minimum BELL Purchase
         Requirement and any associated upgrade Capacity in accordance with the
         terms on Schedule A attached hereto.

                  (c) Purchases of Capacity on any System pursuant to this
         Agreement shall be effected by Purchaser executing, delivering and
         complying with a CPA with Grantor or any of its Affiliates. Purchaser
         acknowledges that the purpose of this Agreement is to support the
         development of Purchaser's international communications transport and
         services business and Purchaser may utilize its Capacity purchased
         pursuant hereto in any manner it chooses. Notwithstanding the
         foregoing, if any of the Capacity is being resold in a manner that
         causes Purchaser or any of its Affiliates to be in competition with
         Grantor or any of its Affiliates, Grantor or Purchaser may, by notice
         to the other terminate this Agreement. If this Agreement is so
         terminated by either Party, that Capacity (including applicable upgrade
         rights) which Purchaser has purchased from Grantor or its Affiliates
         pursuant hereto may be used by Purchaser in any manner it chooses.

                  (d) The Purchaser will use all commercially reasonable efforts
         to make Purchases of Capacity to satisfy the Minimum BELL Purchase
         Requirement for each Commitment Year from time to time throughout such
         Commitment Year so as to maintain a balance between Capacity
         Requirements acquired from Grantor and its Affiliates and those
         acquired from other Providers, subject to the following true up. Within
         thirty (30) days after the end of each Commitment Year, Purchaser shall
         determine (i) the aggregate Capacity Requirements for such Commitment
         Year and (ii) the amount of Capacity purchased by the Purchaser from
         Grantor and its Affiliates during such Commitment Year. If Purchaser
         had not satisfied the Minimum Bell Purchase Requirement for such
         Commitment Year, Purchaser shall forthwith pay to Grantor the amount of
         the deficiency. Such amount shall be credited against amounts payable
         by Purchaser and its Affiliates in

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         connection with subsequent Purchases of Capacity on the FLAG Network,
         provided that such amount shall not be credited against or otherwise
         reduce the Minimum BELL Purchase Requirement for the then current or
         any subsequent Commitment Year. The pricing for Capacity purchased by
         Purchaser with such a credit shall be calculated pursuant to Section
         2(b) above.

                  (e) Subject to the terms and conditions of the CPAs, the
         Grantor and its Affiliates shall have full and complete control,
         authority and responsibility for determining any system configuration
         or designs or changes therein, system upgrades, routing configurations
         or rearrangement and all related functions with regard to each System
         and the provisions of Capacity thereon to the Purchaser and shall keep
         Purchaser apprised of any and all developments that might impact
         Purchaser's commitments hereunder. However, Grantor shall not
         substitute routes or Systems chosen by Purchaser without the express
         written consent of Purchaser. The Grantor and its Affiliates will have
         sole responsibility for negotiating, executing and administering
         contracts and all other aspects related to the construction, operation,
         maintenance and repair of each System. The Parties shall negotiate in
         good faith to include the following in each CPA where, and to the
         extent, applicable per system design and offered to other customers of
         Grantor: service levels for essential metrics including bit error rate,
         availability, mean time to respond and restore, and fulfillment of
         provisioning times; service level relief in the event of failure to
         meet service levels; a failure to fulfill provisioning times shall have
         the result that Purchaser's procurement of replacement Capacity shall
         not be counted when calculating the Minimum Bell Purchase Requirement;
         and chronic failure to meet service levels shall be a material breach.
         Failure of the Parties to agree on each of the foregoing terms in a CPA
         shall have the result that Purchaser's procurement of such Capacity
         from a third party shall not be counted when calculating the Minimum
         Bell Purchase Requirement.

                  (f) Purchaser shall pay Grantor such amounts for reasonable
         operation and maintenance at a price of cost (to be defined on a case
         by case basis) plus 10%, with such payments tied to Purchaser's request
         for circuit activation. Purchaser and its Affiliates shall have the
         right, upon reasonable notice to Grantor, to audit the cost components
         of Operation and Maintenance.

                  (g) After the end of each Commitment Year, Grantor will be
         entitled to request Purchaser to provide an annual Letter of
         Representation from Purchaser's Auditor (or other professional advisor)
         that confirms the Minimum BELL Purchase Requirement for that year.

3.       GLOBAL PORTABILITY

         Purchases of Capacity under this Agreement may be swapped for Capacity
         of equivalent value under Grantor's Global Portability Program. This
         Program will be described in detail in any CPA signed by the Parties.

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4.       CHANGE IN CONTROL

         If during the term of this Agreement, any person acquires a majority of
         the equity interest, assets or Control of Grantor or any Affiliate
         controlling the FLAG Network and Purchaser has not participated in that
         transaction, the Purchaser shall have the right to terminate its future
         Minimum BELL Purchase Requirements described in Section 2(a) hereof by
         delivering written notice to the Grantor within 30 days of the
         consummation of any such acquisition transaction, which such written
         notice shall specify a termination date (the "COMMITMENT TERMINATION
         DATE") determined by the Purchaser in its sole discretion; PROVIDED
         that any Capacity previously purchased by the Purchaser may not be
         terminated.

5.       REPRESENTATIONS

                  (a) The Grantor hereby represents and warrants to the
         Purchaser that (i) the Grantor is a company duly organized and validly
         existing under the laws of Bermuda; (ii) the execution, delivery and
         performance of this Agreement by the Grantor have been duly authorized
         by all necessary corporate action on the part of the Grantor and this
         Agreement is a valid, binding and enforceable obligation of the Grantor
         enforceable against the Grantor in accordance with its terms; and (iii)
         the execution, delivery and performance of this Agreement by the
         Grantor do 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 the Grantor.

                  (b) The Purchaser hereby represents and warrants to the
         Grantor that (i) the Purchaser is a corporation duly organized and
         validly existing under the laws of its jurisdiction of organization;
         (ii) the execution, delivery and performance of this Agreement by the
         Purchaser have been duly authorized by all necessary corporate action
         on the part of the Purchaser and this Agreement is a valid, binding and
         enforceable obligation of the Purchaser enforceable against the
         Purchaser in accordance with its terms; and (iii) the execution,
         delivery and performance of this Agreement by the Purchaser do 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 the Purchaser.

6.       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 shall be finally
         settled under the Rules of Arbitration of the International Chamber of
         Commerce by one arbitrator appointed in accordance with

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         such Rules. The place of arbitration shall be London. The arbitration
         shall be conducted in English. The decision and award resulting from
         such arbitration shall be final and binding on the Parties. Judgement
         on the arbitration award may be rendered by any court of competent
         jurisdiction, or application may be made to such court for a judicial
         acceptance of the award and an award of enforcement. Insofar as
         permissible under the applicable laws, the Parties hereby waive all
         rights to object to any action for judgement or execution which may be
         brought before a court of competent jurisdiction on an arbitration
         award or on a judgement rendered thereon.

7.       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, WITHOUT
         REGARD TO CONFLICT OF LAWS PROVISIONS.

8.       WAIVER OF IMMUNITY

         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.

9.       NO THIRD PARTY BENEFICIARIES

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

10.      ASSIGNMENT

                  (a) This Agreement and all the provisions hereof shall be
         binding upon and inure to the benefit of the Parties hereto and their
         respective successors and permitted assigns; provided that, neither
         this Agreement nor any of the rights, interest or obligations hereunder
         shall be assigned or transferred by either of the Parties hereto
         without the prior written consent of the other Party, and any attempted
         assignment or transfer in violation of this clause shall be void.
         Notwithstanding the foregoing, Purchaser may assign its rights, duties
         and obligations under this Agreement upon notice to Grantor, but
         without Grantor's prior consent, to Purchaser's Affiliates or to any
         transferee of or successor to all or substantially all of the business
         assets of Purchaser, provided:

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                  (i) the Affiliate, transferee or successor agrees to be bound
                  by all terms and conditions of this Agreement; and

                  (ii) the Affiliate, transferee or successor is authorised or
                  permitted under the laws and regulations of its country to
                  acquire and use the Capacity.

                  (b) Grantor may use subcontractors or agents to fulfil its
         obligations as set forth in the applicable CPAs.

11.      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):

                 If to the Purchaser:      Bell Atlantic Global Systems Company
                                           1095 Avenue of the Americas
                                           New York, New York  10036
                 Attn:                     President
                 Fax No:                   212-598-2862

                 With Copy to:             Bell Atlantic Corporation
                                           1095 Avenue of the Americas
                                           New York, New York
                 Attn:                     International Counsel
                 Fax No.                   212-764-2739

                 With Copy to              Bell Atlantic International
                                           1095 Avenue of the Americas
                                           Room 444
                                           New York, NY 10036
                 Attn:                     John Pricken
                 Fax No.:                  212-597-2696

                 If to the Grantor:        FLAG Telecom Holdings Limited
                                           The Emporium Building
                                           69 Front Street
                                           4th Floor

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                                            Hamilton  HM  12
                                            Bermuda

                  Attn:                     Chief Executive Officer
                  Fax No.:                  441-296-0938

                  With Copy to:             FLAG Telecom Limited
                                            103 Mount Street - 3rd Floor
                                            London W1Y 5HE UK

                  Attn:                     General Counsel
                  Fax No.:                  011-44-20-7317-0808

                  Any change to the name, address and facsimile numbers may be
         made at any time by giving fifteen (15) days prior written notice in
         accordance with this Section. 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.

12.      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.

13.      HEADINGS

         The Section headings of this 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.

14.      COUNTERPARTS

          This Agreement may be executed in counterparts. Any single counterpart
         or set of counterparts signed, in either case, by both of the Parties
         hereto shall constitute a full and original agreement for all purposes.

15.      ENTIRE AGREEMENT

         This Agreement supersedes all prior oral or written understandings
         between the parties hereto and constitutes the entire agreement with
         respect to the subject matter herein. Any

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         and all prior or contemporaneous agreements and understandings between
         or among the Parties regarding the subject matter hereof, whether
         written or oral, are superseded by this Agreement.

16.      AMENDMENTS AND WAIVERS

         No amendment or waiver of any provisions of this Agreement, and no
         consent to any default under this Agreement, shall be effective unless
         the same shall be in writing and duly executed by the party against
         whom such amendment, waiver or consent is claimed. In addition, no
         course of dealing or failure of either Party to enforce strictly any
         term, right or condition of this Agreement shall be construed as a
         waiver of such term, right or condition.

17.      PUBLICITY AND CONFIDENTIALITY

         The provisions of this Agreement and any other information, written or
         oral, with respect to this Agreement or delivered hereunder
         ("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 or other advisers, (v) to existing or prospective lenders to
         the Grantor or any of its affiliates, and (vi) to any actual or
         proposed permitted assignee 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 Section.

         Neither Party shall make any public announcement with respect to this
         Agreement or the contents hereof without the other Party's consent.

18.      LIMITATION OF LIABILITY

         In no event shall the Purchaser or the Grantor 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.

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19.      TERMINATION AND BREACH

         (a) In addition to any other rights or remedies that either Party may
         have hereunder or at law or in equity, in the event that either Party
         defaults in the performance of any material term hereunder (a "Material
         Breach") and fails to cure such Material Breach within forty-five (45)
         days after written notice from the other Party, then the other Party
         may, by giving not less than ten (10) days prior written notice to the
         breaching Party, terminate this Agreement as of a date specified in
         such notice of termination.

         (b) In the event that either Party hereto (i) files a voluntary
         petition for protection under any applicable bankruptcy law; (ii) is
         the subject of any involuntary proceedings, in bankruptcy, insolvency
         or for the appointment of a receiver or similar officer for it and such
         proceeding is not dismissed within sixty (60) days of the filing
         thereof; (iii) makes an assignment for the benefit of all or
         substantially all of its creditors; or (iv) enters into an agreement
         for the composition, extension, or readjustment of all or substantially
         all of its obligations, then the other Party hereto may, by giving
         written notice thereof to such Party, terminate this Agreement as of a
         date specified in such notice of termination, which date will be at
         least two (2) months following the date of such notice.

         (c) In the event of termination by a Party, each Party will perform its
         obligations under this Agreement up to the effective date of
         termination. Each Party shall also perform obligations which survive
         termination under this Agreement. In the event of termination for
         cause, the terminating Party will have no further obligation or
         liability to the other Party after the effective date of termination
         except for obligations or liabilities that survive termination of this
         Agreement.

IN WITNESS WHEREOF, the Parties have executed this Agreement on the date first
written above.

FLAG TELECOM HOLDINGS LIMITED

By:      /s/ Andres Bande
         ----------------------------

Name:    Andres Bande
         ----------------------------

Title:   Chairman & CEO
         ----------------------------

BELL ATLANTIC GLOBAL SYSTEMS COMPANY

By:      /s/ Daniel C. Petri
         ----------------------------

Name:    Daniel C. Petri
         ----------------------------

Title:   President
         ----------------------------

                                       12<PAGE>

                                                                    EXHIBIT 10.3

                       MCI WORLDCOM ON-NET VOICE AGREEMENT

This On-Net Voice Agreement ("Agreement") is made between MCI
Telecommunications, Inc. ("MCI"), for itself and on behalf of its U.S.-based
affiliates (collectively, "MCI WORLDCOM") and Fastnet ("Customer"). Customer
agrees to the terms of this Agreement with a three (3) year commitment ("Term")
and one hundred eighty thousand dollar ($180,000) Annual Volume Commitment
("AVC"). Customer will receive the On-Net Voice discounts associated with this
Term and AVC as set forth in MCI Tariff FCC No. 1. AVC is net of discounts.

INTERSTATE DS3: For interstate DS3 Private Line service, Customer will pay a
monthly charge (not eligible for discounts) equal to the greater of 29,366 per
circuit mile of $2,000.00 (regardless of mileage). This monthly charge is in
lieu of standard tariffed On-net fixed and per mile charges for DS3 Private Line
service.

SERVICE PROVISIONING AND RECEIPT: MCI WORLDCOM will provide to Customer
interstate and international Services pursuant to MCI Tariff FCC No. 1, and all
other applicable tariffs of MCI WORLDCOM and its U.S.-based affiliates,
(collectively, the "Tariff"). This Agreement incorporates by reference the terms
of the Tariff, which may be modified from time to time in accordance with law
and thereby affect the services furnished to Customer. In the event of
inconsistency between the terms of the Tariff and this Agreement, the Tariff
will be deemed controlling. The rates set forth in the Tariff do not pertain to
the following: charges for MCI WORLDCOM services other than those set forth in
this Agreement; charges for non-tariffed products, access or egress (or related)
charges imposed by third parties; taxes or tax-like surcharges; and other
tariffed charges applicable to Services. Customer agrees to pay all these other
charges, to the extent applicable, in addition to the charges set forth in this
Agreement. If MCI WORLDCOM voluntarily or involuntarily as a result of
government or judicial action cancels the Tarriff in whole or in part, then
effective on such cancellation this Agreement shall, as to canceled Tariff
provisions previously applicable to this Agreement, incorporate by reference the
substantively similar provisions of MCI WORLDCOM's standard Guide to Services
and Pricing ("Guide"), as amended by MCI WORLDCOM from time to time. For
purposes of such provisions, all references to the Tariff shall include
reference to the Guide.

SERVICE CONSIDERATIONS: This Agreement shall be binding upon acceptance and
execution by MCI WORLDCOM. Acceptance of this Agreement by MCI WORLDCOM is
subject to customer meeting the terms and conditions set forth in the Tariff
and, as applicable, in the Credit Approval Terms Attachment. The Term of this
Agreement shall begin not later than the first day of the 1st full monthly
billing period following acceptance of this Agreement by MCI WORLDCOM
("Agreement Start Date"). Customer shall not disclose the terms of this
Agreement to any third party.

APPLICABLE SERVICES: With the exception of Frame Relay and Internet Service,
this Agreement includes only those services billed under the On-Net Voice
Customer ID assigned hereto and inserted below by MCI WORLDCOM.

CELLULAR AND PAGING SERVICES: Should Customer choose to order cellular service
or MCI WORLDCOM voice paging service, under the applicable MCI WORLDCOM Customer
agreement, that provides charges for cellular or paging services will contribute
towards Customer's AVC, then MCI WORLDCOM shall allow such contribution
only subsequent to Customer's execution of the appropriate agreement(s). In
addition, Customer shall be eligible to receive a discount on the charges for
cellular and/or paging services as set forth in these agreements. Voice paging
service monthly recurring and usage charges, after the application of discounts,
shall contribute to the AVC, if permitted in Customer's paging agreement.

INTERNET SERVICES: Should Customer choose to order Internet Service under an MCI
WORLDCOM Internet Services Agreement ("Internet Agreement") that provides that
charges for internet services will contribute towards Customer's AVC then MCI
WORLDCOM shall allow such contribution only subseqent to Customer's execution of
the Internet Agreement. In addition, Customer shall then be eligible to receive
a discount on the charges of Internet Services as set forth in Internet
Agreement. Internet Service monthly recurring and usage charges, after the
application of disounts, shall contribute to the AVC permitted in the Internet
Agreement.

Any capitalized terms not expressly defined in an Attachment to this Agreement
shall have the meaning given to such term in this Agreement.

ACCEPTANCE DEADLINE: This Agreement shall be of no force and effect and the
offer contained herein shall be deemed withdrawn unless this Agreement is
executed by Customer and delivered to MCI WORLDCOM on or before September 03,
1999.

AUDIOCONFERENCING: Audioconferencing from MCI WORLDCOM Conferencing is a
one-way, multi-point service that allows long distance telecommunications
service between a single calling station and two or more called stations.
Audioconferencing requires a teleconferencing bridge port for each called
station. The necessary bridge ports are provided by a designated MCI WORLDCOM
Conference Center.

MCI WORLDCOM LOCAL SERVICE. Where MCI WORLDCOM has received applicable
regulatory approval and filed the necessary tariff(s). Customer will be eligible
to receive a discount based upon the AVC and Term indicated above on its
eligible monthly charges for MCI WORLDCOM facilities-based local exchange
service. Local exchange service are provided by MCI WORLDCOM operating
subsidiaries pursuant to applicable state tariffs and is subject to the terms
and conditions of the On-Net Voice Term Plan set forth in the applicable state
tariffs or transactional vehicles.

UNDERUTILIZATION: If at the end of any Annual Period as hereinafter defined,
Customer's Qualifying Volume (as defined in the Tariff) during such Annual
Period fails to meet or exceed the AVC, Customer shall pay, in addition to all
other charges under this Agreement, the difference between the AVC and
Customer's Qualifying Volume during such Annual Period. For purposes of this
Agreement, "Annual Period" means the consecutive twelve (12) month period
commencing on the Agreement Start Date hereof and each consecutive twelve (12)
month period thereafter during the Term or any renewal Term hereof.

EARLY TERMINATION: If Customer terminates this Agreement prior to the expiration
of the Term, Customer shall be required to pay, in addition to all accrued but
unpaid charges through the date of termination, the difference between
Customer's actual Qualifying Volume and the AVC for the Annual Period of
termination, plus fifty (50%) of the AVC for all Annual Periods of the remainder
of the Term.

CONVERSION FROM EXISTING MCI WORLDCOM AGREEMENTS: If Customer meets the
conditions stated under "Termination without Liability" in Tariff, execution of
this Agreement will cause an existing MCI or WORLDCOM term plan agreement to
terminate automatically without application of any Early Termination Charges in
those agreements. Early Termination and Underutilization Charges will apply if
Customer is ineligible for conversion from existing MCI or Worldcom term plans
without liability if all services are not converted to the On-Net Voice Plan.

PAYMENT ARRANGEMENTS: Customer must pay MCI WORLDCOM for services, including any
applicable underutilization charges or early termination charges within thirty
(30) days after Customer's receipt of MCI WORLDCOM's invoice.

TERM RENEWAL: Upon the expiration of the Term, this Agreement will automatically
renew on a month-to-month basis until either party provides the other party with
at least thirty (30) days' advance written notice of its intent to terminate
this Agreement.

ASSIGNMENT: Neither this Agreement, nor any rights or obligations of Customer in
this Agreement, shall be transferable or assignable by Customer without MCI
WORLDCOM's prior written consent, which will not be unreasonably withheld or
delayed, and any attempted transfer of assignment hereof by Customer not n
accordance herewith shall be null and void.

GOVERNING LAW: This Agreement, and all causes of action arising out of this
Agreement, will be subject to the Communications Act of 1934, as amended (the
"Act"), or, if any part of this Agreement is not governed by the Act, by the
domestic law of the State of New York without regard to its choice of law
principles.

ENTIRE AGREEMENT: This Agreement, including the Tariff and the Attachments
referenced below, is the complete agreement of the parties and supercedes any
prior agreements or representations, whether oral or written, with respect
thereto. Except for Tariff modifications initiated by MCI WORLDCOM , no
amendment to this Agreement will be valid unless each such change is accepted in
writing by an authorized representative of both parties.

Eligible usage will contribute to the overall revenue commitment level and is
eligible to receive discounts per the Tariff. Applicable rates and Discounts for
MCI WORLDCOM Audioconferencing are set forth in the Tariff.

ADDITIONAL ATTACHMENTS: This Agreement incorporates the following Attachment(s):

Attachment A - Customer Profile
Attachment B - PLFlatRatePromo
Attachment C - IOC Discount Private Line Access Promotion
Attachment D - Frame Relay Integration Addendum
Attachment E - FRFlatRatePromo

--------------------------------------------------------------------------
Fastnet
Two Courtney Place
Suite 130
Bethlehem, PA  18017

MCI WorldCom - Office Use Only
Corp ID:
Contract:250811-01
Branch: 045
Billing Code: OPT213180
Sales Rep: Christopher Teefy
(609) 681-4064

FASTNET

/s/ Phillip Weller                                      8/6/99
-------------------------------------------          ---------------
Philip Weller, Vice President - Engineering          Acceptance Date

MCI TELECOMMUNICATIONS CORPORATION

-------------------------------------------          ----------------
Frank Grillo, Vice President of Marketing            Acceptance Date
--------------------------------------------------------------------------

<PAGE>

                       MCI WORLDCOM ON-NET VOICE AGREEMENT
--------------------------------------------------------------------------
--------------------------------------------------------------------------

<PAGE>

                       MCI WORLDCOM ON-NET VOICE AGREEMENT
                            ATTACHMENT A (CONTINUED)

                    MCI WORLDCOM COMMERCIAL CUSTOMER PROFILE
                              TERMS AND CONDITIONS

1.       SERVICE AND PAYMENT TERMS. Customer and Guarantor agree to pay to MCI
         WORLDCOM all applicable Service charges and any and all federal, state,
         or local taxes that may apply to MCI WORLDCOM services provided.
         Customer's account becomes delinquent if payment is not received by MCI
         WORLDCOM on or before thirty (30) days from the billing date found on
         the invoice. If MCI WORLDCOM does not receive notice, in writing, of a
         dispute about the charges within thirty (30) days after an invoice is
         rendered, such invoice shall be deemed correct and binding. Customer
         agrees to make payment to MCI WORLDCOM at the address of the MCI
         WORLDCOM operating center designated on the first page of this
         Application; the place designated on the invoice; or at such place as
         MCI WorldCom directs. Customer agrees to and will be assessed a
         returned-check charge of up to $25.00 for any Customer check that a
         financial institution refuses to honor.

2.       TERMINATION RIGHTS. MCI WORLDCOM, by oral or written notice to
         Customer, may immediately discontinue (unless the state in which
         customer resides prohibits or requires some other notification period)
         all Service(s) provided by MCI WORLDCOM to Customer or cancel a Service
         Agreement for any of the following reasons: (i) A breach by Customer of
         any of the provisions in the Service Agreement or this Credit
         Application; (ii) The failure of Customer to provide a satisfactory
         security deposit; (iii) Any violation by Customer of any law, rule, or
         regulation (including applicable Tariffs); (iv) MCI WORLDCOM's
         inability to furnish Service to Customer because of any law, rule,
         court order, or other government regulation or interference; (v) Any
         unauthorized or non-permitted use of MCI WORLDCOM Service; and (vi) Any
         event, transaction, or occurrence outside the control of MCI WORLDCOM.

3.       INTEREST CHARGE. Customer agrees to pay to MCI WORLDCOM the lesser of
         an annual rate of interest of 18% (or a monthly rate of 1.5%) or the
         maximum rate allowed by law on all accounts that are delinquent. If the
         transactions contemplated by this Application would be usurious or
         violate any law, MCI WORLDCOM and Customer (or Guarantor, as defined
         below) agree (i) that the total amount contracted for, charged or
         received by MCI WORLDCOM that constitutes interest shall not exceed the
         maximum amount of interest allowed by law and (ii) that any excess
         interest that is above that allowed by law shall be credited or paid to
         Customer.

4.       REPRESENTATIONS AND WARRANTIES. Customer, Guarantor, and the person(s)
         signing this Application represent and warrant to MCI WORLDCOM that (i)
         that the person executing on behalf of Customer has the authority and
         power to execute this application; (ii) Customer conducts a bona fide
         business and is in compliance with all laws; (iii) MCI WORLDCOM
         services will be used solely for commercial purposes; and (iv) Customer
         will abide by the permitted uses as set forth in the Service Agreement.

5.       JURISDICTION AND VENUE. Customer and Guarantor agree that they, by
         executing this Application or Guaranty, are doing business in a state
         identified on the first page of this Application as a MCI WORLDCOM
         operating center, and all claims or causes of action that in any way
         arise out of or relate to the Application or Guaranty Agreement or the
         provision of service may be brought in a court of competent
         jurisdiction in such state. Customer and Guarantor hereby SPECIFICALLY
         AND VOLUNTARILY WAIVE the right to seek to transfer venue from the
         court in which MCI WORLDCOM against Customer or Guarantor has filed any
         action.

6.       Guaranty AGREEMENT (If applicable). For value received, and in
         consideration of the credit heretofore and hereafter extend by MCI
         WORLDCOM, the undersigned, to Customer and all of its successors and
         assigns, whether one or more ("Guarantor"), jointly and severally
         guarantee the full and punctual payment when due of all indebtedness
         (as hereinafter defined) owing by Debtor to MCI WORLDCOM . "Debtor"
         includes Customer and all other entities owned or controlled by
         Customer and/or Guarantor, whether such entities are now or hereafter
         existing. Guarantor agrees that such guarantee is a continuing
         guarantee of payment of all indebtedness owing by Debtor to MCI
         WORLDCOM now outstanding or owing or which thereafter may exist or be
         incurred. It shall be conclusively presumed that all extensions of
         credit and financial accommodations made by MCI WORLDCOM to Debtor made
         concurrently herewith or hereafter are made in reliance upon this
         Guaranty Agreement.

         This guarantee shall continue until such time as Guarantor gives
         written notice of termination by actual delivery thereof to the Credit
         Manager of MCI WORLDCOM at the operating center identified on the first
         page hereof, and such notice of termination is acknowledged in writing
         by an officer of MCI WORLDCOM. Such termination of this guarantee shall
         not be effective as to the Indebtedness then owing to MCI WORLDCOM by
         Debtor, and this guarantee shall continue as to any such Indebtedness
         until the same is fully paid, discharged, and satisfied.

         Guarantor absolutely and unconditionally guarantees payment of the
         Indebtedness to MCI WORLDCOM. Guarantor's liability hereunder shall not
         be impaired, reduced, or affected by MCI WORLDCOM's failure, refusal,
         or neglect to collect the Indebtedness from Debtor, or to enforce or
         preserve any other security or guarantee, or the failure to perform any
         other act prior to seeking payment from Guarantor.

<PAGE>

         Guarantor hereby expressly waives and consents in advance to any change
         or alteration of any agreement between Debtor and MCI WORLDCOM,
         including, without limitation, the rearrangement, renewal, and/or
         extension of Debtor's Indebtedness. Guarantor's liability hereunder
         shall not be impaired, reduced, or affected by the taking of any other
         guarantee or security for the Indebtedness, or by the release,
         subordination, or loss of any such other guarantee or security, whether
         done voluntarily by MCI WORLDCOM or by the death, insolvency,
         bankruptcy, disability of Debtor, or any Guarantor.

         As used herein "Indebtedness" means and includes every claim, demand,
         right, and/or cause of action of every kind or character and all
         extensions and renewals thereof, whether arising by reason of sales of
         goods; merchandise or service on open account: promissory notes;
         interest; express or implied contracts; tort; any other matter; or
         whether constituting a joint or several; direct or indirect; or primary
         or secondary liability of Debtor to MCI WORLDCOM.

7.       AUTHORITY TO APPROVE. This Application for Commercial Credit is a
         solicitation by Customer to MCI WORLDCOM for an offer to sell to
         Customer telephone, Internet, and/or related services. Until such offer
         is made by MCI WORLDCOM and accepted by Customer, there is no contract
         obligating MCI WORLDCOM to provide any goods or services to Customer.
         MCI WORLDCOM will make no offer until Customer's credit worthiness has
         been investigated and approved by MCI WORLDCOM. NO SALESPERSON HAS
         AUTHORITY TO ENTER INTO THIS AGREEMENT OR ANY SIDE AGREEMENT.

<PAGE>

                       MCI WorldCom On-Net Voice Agreement
                                  Attachment A

                    MCI WorldCom Commercial Customer Profile
<TABLE>
<CAPTION>
------------------------------- ------------------ ----------------------- ----------------------- -----------------------
SALES INFORMATION
-------------------- ---------- ------------------------------------------------------------------------------------------
<S>                  <C>        <C>                   <C>
Sales Rep/ARM Name   Sales Rep  East National/Data    Address-East & National/Data: 6929 N. Lakewood Ave., Tulsa, OK 74117
                     ID                                                             (918-590-6000)
                                West Agents
Christopher Teefy                                     Address - West & Agents: 100 N.E. Loop 410, San Antonio, TX 78216
                                                                                    (210-285-2454)
<CAPTION>
--------------------------------------------------------------------------------------------------------------------------
APPLICANT INFORMATION
-------------------------------------------------------------------------- ----------------------- -----------------------
Complete Company Name (If incorporated, name shown on corporate charter)   Taxpayer ID (Required)  Date Business Started
<S>                                                                        <C>                     <C>
Fastnet
<CAPTION>
------------------------------- ------------------------------------------ ----------------------- -----------------------
Main Business Phone Number      Type of Business (Required)                State of Incorporation  Date of Incorporation
<S>                             <C>                                        <C>
610-289-1100                    Internet Service Provider
--------------------------------------------------------------------------------------------------------------------------
Street Address - Line 1
Two Courtney Place
<CAPTION>
-------------------------------------------------- ----------------------- ----------------------- -----------------------
Street Address - Line 2                            City                    State                   Zip + 4
<S>                                                <C>                     <C>                     <C>
Suite 130                                          Bethlehem               PA                      18017
-------------------------------------------------- ----------------------- ----------------------- -----------------------
Billing Address - Line 1

--------------------------------------------------------------------------------------------------------------------------
Billing Address - Line 2                           City                    State                   Zip + 4
<CAPTION>
-------------------------------------------------- ----------------------- ----------------------- -----------------------
PARENT OR SUBSIDIARY INFORMATION
--------------------------------------------------------------------------------------------------------------------------
Check One                       Name of Business                           State of Incorporation  Percentage Owned
<S>             <C>             <C>                                        <C>                     <C>
Parent          Subsidiary
<CAPTION>
--------------------------------------------------------------------------------------------------------------------------
PRINCIPAL, PARTNER, AND MAJOR-SHAREHOLDER INFORMATION   LIST THE COMPLETE NAMES OF ALL PRINCIPALS, PARTNERS, AND MAJOR
                                                           SHAREHOLDERS
------------------------------- ------------------------------------------ -----------------------------------------------
<S>             <C>             <C>                                        <C>
                                Name of Owner                              Social Security Number
  CHECK ONE
                                ------------------------------------------ -----------------------------------------------
                                Name of Partner 1                          Social Security Number
Sole            Partnership
Proprietorship                  ------------------------------------------ -----------------------------------------------
                                Name of Partner 2                          Social Security Number

LLC             LLP             ------------------------------------------ -----------------------------------------------
                                Name of Officer 1                          Title

Private         Public          ------------------------------------------ -----------------------------------------------
 Corporation     Corporation    Name of Officer 2                          Title
<CAPTION>
--------------------------------------------------------------------------------------------------------------------------
REFERENCE
<S>                                                                        <C>                     <C>
-------------------------------------------------------------------------- ----------------------- -----------------------
Name of Bank                                                               Phone                   Fax

-------------------------------------------------------------------------- ----------------------- -----------------------
Lending Officer                                                            Account Number

-------------------------------------------------------------------------- -----------------------------------------------
PREVIOUS OR EXISTING LOCAL-SERVICE PROVIDER                                Previous or Existing    Long-Distance Provider

-------------------------------------------------------------------------- -----------------------------------------------
<CAPTION>
General Trade References     LIST BUSINESSES WITH WHICH THE APPLICANT HAS TRADED WITHIN THE LAST 12 MONTHS
--------------------------------------------------------------------------------------------------------------------------
       Company                                     Name of Contract        Phone                   Fax
<S>    <C>                                         <C>                     <C>                     <C>
------ ------------------------------------------- ----------------------- ----------------------- -----------------------
1
------ ------------------------------------------- ----------------------- ----------------------- -----------------------
2
------ ------------------------------------------- ----------------------- ----------------------- -----------------------
3
------ ------------------------------------------- ----------------------- ----------------------- -----------------------
USAGE, CREDIT AND SIGNATURES
--------------------------------------------------------------------------------------------------------------------------
<CAPTION>
Estimated Monthly Usage         Authorization of Credit Investigation:
<S>                             <C>
30000                           Applicant authorizes MCI WorldCom to investigate his credit and understands that
                                MCI WorldCom may also utilize the other sources of credit deemed necessary.  Such
------------------------------- information will be held in strict confidence.  Applicant agrees to indemnify and
Requested Credit Limit          hold MCI WorldCom and any other persons harmless from all liability, damage, or
                                expenses arising from or relating to any and all credit investigations by MCI WorldCom.
                                Applicant has read and agrees to the Terms and Conditions attached to this Application.
<CAPTION>
------------------------------- ------------------------------------------------------------------------------------------
Name of Authorized Officer, Owner, or Partner      Title or Authorized Officer, Owner, or Partner  Application Tracking ID
<S>                                                <C>                                             <C>
Phillip Weller                                     Vice President - Engineering                    50642

-------------------------------------------------- ----------------------------------------------- -----------------------
Signature of Authorized Officer, Owner, or Partner                                                 Date
/s/ Phillip Weller                                                                                 8/6/99

-------------------------------------------------------------------------------------------------- -----------------------
CONTINUING GUARANTEE OF SERVICE                     COMPLETE ONLY WHEN GUARANTY IS REQUIRED BY MCI WORLDCOM
<CAPTION>
--------------------------------------------------------------------------------------------------------------------------
I personally guarantee payment of account to MCI WorldCom, Inc. executed effective in the date below.
--------------------------------------------------------------------------------------------------------------------------

<PAGE>
--------------------------------------------------------------------------------------------------------------------------
Name                                                                       Social Security Number
<S>                                                                        <C>                     <C>
-------------------------------------------------------------------------- -----------------------------------------------
Home Address                                                               State                   Zip + 4

-------------------------------------------------------------------------- ----------------------- -----------------------
Signature                                                                  Date

-------------------------------------------------------------------------- -----------------------------------------------
</TABLE>

<PAGE>

                       MCI WORLDCOM ON-NET VOICE AGREEMENT
                                  ATTACHMENT B

              MCI WORLDCOM FLAT-RATE PRIVATE LINE ACCESS PROMOTION

--------------------------------------------------------------------------------
CUSTOMER INFORMATION
--------------------------------------------------------------------------------
COMPANY NAME                      CONTACT                        TITLE
Fastnet

------------------------------------------------- ------------------------------
BILLING ADDRESS - LINE 1                                         PHONE
Two Courtney Place                                               610-289-1100

--------------------------------- ------------------------------ -------- ------
BILLING ADDRESS - LINE 2          CITY                           STATE    ZIP
Suite 130                         Bethlehem                      PA       18017
--------------------------------------------------------------------------------
PROMOTION SUMMARY
--------------------------------------------------------------------------------

    Customer receives flat-rate local loops for all new DSO's and T1's.
    Interstate service must be provided by MCI WorldCom. Promotion applies
    to "meet-point" circuits. Promotional rates are applicable for the
    length of the term agreement. Additional terms and conditions may
    apply.

<TABLE>
<CAPTION>
     ---------------------------------------------------------------------------------------
     Monthly
     Recurring
     Per-Circuit                                 Access Type
     Charges

     ------------- ------------------------ ----------------------- ------------------------
                              1                       2                        3
     ------------- ------------------------ ----------------------- ------------------------

     Monthly                                                        Access is partially
     Recurring                              Access is at least      owned by MCI WorldCom
     Pre-Circuit                            partially served or     and spans more than 20
     Charges       Access is completely     owned by MCI WorldCom,  miles overall, or no
                   owned by MCI WorldCom    and spans less than     part of the circuit is
                                            20 miles overall.       provided by MCI
                                                                    WorldCom.
     ------------- ------------------------ ----------------------- ------------------------
     TERM YEARS        DSO         DS1         DS0         DS1         DS0          DS1
     ------------- ------------ ----------- ----------- ----------- ----------- ------------
<S>                <C>          <C>         <C>         <C>         <C>         <C>
          1             [*]         [*]        [*]          [*]          [*]         [*]
     ------------- ------------ ----------- ----------- ----------- ----------- ------------
          2             [*]         [*]        [*]          [*]          [*]         [*]
     ------------- ------------ ----------- ----------- ----------- ----------- ------------
          3             [*]         [*]        [*]          [*]          [*]         [*]
     ------------- ------------ ----------- ----------- ----------- ----------- ------------
          4             [*]         [*]        [*]          [*]          [*]         [*]
     ------------- ------------ ----------- ----------- ----------- ----------- ------------
          5             [*]         [*]        [*]          [*]          [*]         [*]
     ---------------------------------------------------------------------------------------
</TABLE>
     The Account Term must provide below all related hardware information for
     each T1 or Circuit, in order to ensure proper enrollment and invoicing. The
     Promotion Code will be assigned at the T-Carrier level; however, if not ID
     is available, the Promotion Code will be assigned at the Circuit level.
<TABLE>
<CAPTION>
     ----------------------------------------------------------------------------------------
     T-CARRIER ID         CIRCUIT   DSO OR DS1   NPA-NXX   SERVICE ORDER    ACCESS TYPE
     (OPTION 2&3)         ID                               NO.              (1,2,3)
<S>  <C>                  <C>       <C>          <C>       <C>              <C>
---- -------------------- --------- ------------ --------- ---------------- -----------------
1

---- -------------------- --------- ------------ --------- ---------------- -----------------
2

---- -------------------- --------- ------------ --------- ---------------- -----------------
3

---- -------------------- --------- ------------ --------- ---------------- -----------------
4

---- -------------------- --------- ------------ --------- ---------------- -----------------
5

---- -------------------- --------- ------------ --------- ---------------- -----------------
6

---- -------------------- --------- ------------ --------- ---------------- -----------------
7

---- -------------------- --------- ------------ --------- ---------------- -----------------
8

---- -------------------- --------- ------------ --------- ---------------- -----------------
9

---- -------------------- --------- ------------ --------- ---------------- -----------------
10

---- -------------------- --------- ------------ --------- ---------------- -----------------
11

---- -------------------- --------- ------------ --------- ---------------- -----------------
12

---- -------------------- --------- ------------ --------- ---------------- -----------------
13

---- -------------------- --------- ------------ --------- ---------------- -----------------
14

---- -------------------- --------- ------------ --------- ---------------- -----------------
15

---- -------------------- --------- ------------ --------- ---------------- -----------------
16

---- -------------------- --------- ------------ --------- ---------------- -----------------
17

---- -------------------- --------- ------------ --------- ---------------- -----------------
18

---- -------------------- --------- ------------ --------- ---------------- -----------------
19

---- -------------------- --------- ------------ --------- ---------------- -----------------
20

---- -------------------- --------- ------------ --------- ---------------- -----------------
21

---- -------------------- --------- ------------ --------- ---------------- -----------------
22

---- -------------------- --------- ------------ --------- ---------------- -----------------
23

---- -------------------- --------- ------------ --------- ---------------- -----------------
24

---- -------------------- --------- ------------ --------- ---------------- -----------------
</TABLE>

[*] We are seeking confidential treatment of these terms, which have been
omitted. The confidential portion has been filed separately with the
Securities and Exchange Commission.

<PAGE>

                       MCI WORLDCOM ON-NET VOICE AGREEMENT
                                  ATTACHMENT C

                   IOC DISCOUNT PRIVATE LINE ACCESS PROMOTION
                                   FOR FASTNET

A Customer that enrolls in an MCI WORLDCOM On-net Private Line Agreement shall
receive the monthly recurring Inter-Office Service discounts provided below, in
addition to an On-net Private Line discounts associated with the selected term
and volume commitment. The IOC discount is contingent on the length of the
customer's new on-net contract signed. The discounts for all other products and
service are set forth in MCI F.C.C. Tariff No. 1.

The customer must place an order for installation of all circuits which receive
the benefits of this promotion by September 30, 1999. All circuits which receive
the benefits of this promotion must be installed by October 31, 1999.

                                      [*]

[*] We are seeking confidential treatment of these terms, which have been
omitted. The confidential portion has been filed separately with the
Securities and Exchange Commission.

<PAGE>

                       MCI WORLDCOM ON-NET VOICE AGREEMENT
                                  ATTACHMENT D

                        FRAME RELAY INTEGRATION ADDENDUM
                                   FOR FASTNET

By enrolling in MCI WORLDCOM Domestic Frame Relay under this MCI WORLDCOM On-Net
Voice Agreement, Customer's local access channel charges for T-1, DPLS, or DSO
access, domestic monthly recurring port charges, and domestic monthly recurring
permanent virtual circuit ("PVC") charges, after the application of discounts,
will contribute toward the volume commitment under this Agreement. In addition,
local access channel and monthly recurring charges for domestic port and PVC
will receive the tariffed discount associated with the term and volume
commitment of this Agreement. Customer will be subject to the term length and
early termiantion and underutilization penalties in this Agreement.

For Frame Relay, Customer will pay the standard rates as set forth in the
Tariff, including but not limited to access charges, standard Tariffed
non-recurring charges, including but not limited to, installation charges and
reconfiguration charges, monthly recurring port and permanent virtual circuit
("PVC") charges.

The rate set forth in the Tariff do not include, and the discounts set forth in
the Tariff do not apply to, the following: charges for Frame Relay Service
Services other than those set forth herein; non-tarriffed products; access or
egress (or related) charges imposed by third parties; taxes or tax-like
surcharges; and other tariffed charges, included without limitation, Universal
Service Fund charges, and Primary Interexchange Carrier Charges, which are
additional.

CUSTOMER SHOULD NOT ENROLL FOR FRAME RELAY SERVICE UNDER THIS AGREEMENT IF
CUSTOMER HAS ENROLLED UNDER A MCI WORLDCOM STANDALONE FRAME RELAY AGREEMENT.

Any capitalized terms not expressly defined in this Attachment shall have the
meaning given to such term in the Agreement.

                               BILLING IDENTIFIERS

        COMS ID (Required)                  ________________________
        Mega ID (if available):             ________________________
        Mega ID (if available):             ________________________
        Mega ID (if available):             ________________________
        Mega ID (if available):             ________________________
        Mega ID (if available):             ________________________
        Mega ID (if available):             ________________________
        Mega ID (if available):             ________________________
        Mega ID (if available):             ________________________
        Mega ID (if available):             ________________________
        Mega ID (if available):             ________________________

<PAGE>

                       MCI WORLDCOM ON-NET VOICE AGREEMENT
                                  ATTACHMENT E

           MCI WORLDCOM FLAT-RATE FRAME RELAY AND ATM ACCESS PROMOTION

--------------------------------------------------------------------------------
Customer Information

------------------------- --------- ------------------- ------------------------
Company Name                        Contact             Title

--------------------------------------------------------------------------------
Billing Address                                         Phone

--------------------------------------------------------------------------------
Promotion Summary

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

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

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

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

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

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

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

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

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

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

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

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

<PAGE>

                       MCI WORLDCOM ON-NET VOICE AGREEMENT
                                  ATTACHMENT E

           MCI WORLDCOM FLAT-RATE FRAME RELAY AND ATM ACCESS PROMOTION

--------------------------------------------------------------------------------
CUSTOMER INFORMATION
--------------------------------------------------------------------------------
COMPANY NAME                      CONTACT                        TITLE
Fastnet

---------------------------------------------------------------- ---------------
BILLING ADDRESS - LINE 1                                         PHONE
Two Courtney Place                                               610-289-1100

------------------------------ -------------------------- ----------- ----------
BILLING ADDRESS - LINE 2       CITY                       STATE       ZIP
Suite 130                      Bethlehem                  PA          18017
------------------------------ -------------------------- ----------- ----------
PROMOTION SUMMARY
--------------------------------------------------------------------------------

          Customer receives flat-rate local loops for all new DSO's and T1's.
          Promotion requires T1 access loops to have a minimum of two channels
          dedicated to Frame Relay or ATM, and the T1's first two channels must
          be assigned to Frame Relay or ATM. Interstate service must be provided
          by MCI WorldCom. Promotion applies to "meet-point" circuits.
          Promotional rates are applicable for the length of the term agreement.
          Additional terms and conditions may apply.
<TABLE>
<CAPTION>
      -------------------------------------------------------------------------------------------
                                  MONTHLY RECURRING PER-CIRCUIT CHARGES

          ---------------------------------------------------------------------------------------
          ------------- ------------ ----------- ------------------------------------------------
           Access Type      DSO          T1                Description of Access Type
          ------------- ------------ ----------- ------------------------------------------------
          <S>           <C>          <C>         <C>
               1             [*]         [*]     Access is completely owned by MCI WorldCom.
          ------------- ------------ -----------  ------------------------------------------------
               2             [*]         [*]     Access is at least partially served or owned
                                                 by MCI WorldCom, and spans less than 20 miles
                                                 overall.
          ------------- ------------ ----------- ------------------------------------------------
               3             [*]         [*]     Access is  partially owned by MCI WorldCom and
                                                 spans more than 20 miles overall, or no part
                                                 of the circuit is provided by MCI WorldCom.
     --------------------------------------------------------------------------------------------
</TABLE>
     The Account Term must provide below all related hardware information for
     each T1 or Circuit, in order to ensure proper enrollment and invoicing. The
     Promotion Code will be assigned at the T-Carrier level; however, if not ID
     is available, the Promotion Code will be assigned at the Circuit level.
<TABLE>
<CAPTION>
     ----------------------------------------------------------------------------------------
     T-CARRIER ID         CIRCUIT   DSO OR DS1   NPA-NXX   SERVICE ORDER    ACCESS TYPE
     (OPTION 2&3)         ID                               NO.              (1,2,3)
<S>  <C>                  <C>       <C>          <C>       <C>              <C>
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</TABLE>

[*] We are seeking confidential treatment of these terms, which have been
omitted. The confidential portion has been filed separately with the
Securities and Exchange Commission.

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00001-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00001-of-00352.parquet"}]]