Document:

<PAGE>
                                                                               .
                                                                               .
                                                                               .

                                                                    Exhibit 4.14

                                                        15 JUNE 2006

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<S>             <C>              <C>                     <C>
[OLSWANG LOGO]  90 High Holborn  T +44 (0) 20 7067 3000  In alliance with Greenberg Traurig LLP
                London WC1V 6XX  F +44 (0) 20 7067 3999
                www.olswang.com  DX 37972 Kingsway       Regulated by the Law Society
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MASTER NETWORK LEASE AND SALE AGREEMENT BETWEEN

(1)   VIATEL HOLDING (BERMUDA) LIMITED

(2)   VTL-TP (BERMUDA) LIMITED AND

(3)   GLOBAL VOICE GROUP LIMITED

<PAGE>

CONTENTS

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<CAPTION>
CLAUSE                                                                                   PAGE
<S>                                                                                      <C>
1     DEFINITIONS AND INTERPRETATION ..................................................    1

2     GRANT OF RIGHTS OVER VIATEL INFRASTRUCTURE ......................................   10

3     GLOBAL VOICE RIGHTS OF ACCESS TO VIATEL SITES AND VIATEL TRANSFERRED ASSETS .....   13

4     GLOBAL VOICE FIBRE TRANSFERS ....................................................   14

5     OPTIONS .........................................................................   17

6     RIGHTS OF VIATEL IN VIATEL TRANSFERRED ASSETS ...................................   17

7     BENEFIT OF CUSTOMER CONTRACTS ...................................................   18

8     NETWORK OPERATIONAL AGREEMENT ...................................................   18

9     CONSIDERATION PAYMENTS AND PAYMENT PROCEDURES ...................................   18

10    NEW EQUIPMENT COMPANY ...........................................................   22

11    COMPLETION ......................................................................   22

12    WARRANTIES ......................................................................   23

13    LIMITATION OF LIABILITY .........................................................   24

14    DURATION AND TERMINATION ........................................................   24

15    ASSIGNMENT ......................................................................   24

16    CONFIDENTIALITY .................................................................   25

17    NON-SOLICITATION ................................................................   26

18    FORCE MAJEURE ...................................................................   26

19    NOTICES .........................................................................   27

20    SEVERANCE .......................................................................   28

21    GENERAL .........................................................................   29

22    GOVERNING LAW AND JURISDICTION ..................................................   30

SCHEDULE I
      CUSTOMER CONTRACTS ..............................................................   32

SCHEDULE IIA
      GERMAN NETWORK ASSETS ...........................................................   34

SCHEDULE IIB
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<PAGE>

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<S>                                                                                       <C>
      GERMAN TRANSFERRED ASSETS .......................................................   35
      Part A: Network Segments ........................................................   35
      Part B: Duct and Fibre Allocations ..............................................   36

SCHEDULE IIIA
      FRENCH NETWORK ASSETS ...........................................................   43

SCHEDULE IIIB
      FRENCH TRANSFERRED ASSETS .......................................................   45
      Part 1 -- Ducts .................................................................   45
      Part 2 -- Fibres ................................................................   46

SCHEDULE IVA
      NBUK NETWORK ASSETS .............................................................   49

SCHEDULE IVA
      NBUK TRANSFERRED ASSETS .........................................................   53
      NETHERLANDS .....................................................................   53
      Part 1 -- Ducts and Subducts ....................................................   53
      Part 2 -- Fibres ................................................................   55
      BELGIUM .........................................................................   56
      UK ..............................................................................   56
      Part 1 -- Ducts and Sub-Ducts ...................................................   57
      Part 2 -- Fibres ................................................................   61

SCHEDULE V
      VIATEL OPERATING COST CATEGORIES (INCL. DRAFT 2006 BUDGET FIGURES) ..............   65

SCHEDULE VI
      PART I
      VIATEL WARRANTIES ...............................................................   67
      PART II .........................................................................   71
      LIMITATIONS ON VIATEL WARRANTIES ................................................   71
      PART III
      GV WARRANTIES ...................................................................   74
      PART IV
      LIMITATIONS ON GV WARRANTIES ....................................................   77

SCHEDULE VII
      VIATEL SITES ....................................................................   80

SCHEDULE VIII
      GV TRANSFERRED ASSETS ...........................................................   86
      Part I
      Part II
      Network Routes ..................................................................   88
      For all routes the allocated fibres will be provided on one continuous
      length along the route of each specified cable.

SCHEDULE IX
      INFLATION INDEXATION MECHANISMS .................................................   92
      Part I
      Clause 4.12: Maintenance Costs payable by Viatel ................................   92
      Part II
      Inflation Indexation elsewhere in a Transaction Document

SCHEDULE X
      PAYMENTS TO VIATEL ..............................................................   93
</TABLE>

<PAGE>

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<S>                                                                                       <C>
SCHEDULE XI

SCHEDULE XII
      CURRENT GLOBAL VOICE ON-NET BUILDINGS ...........................................    1

SCHEDULE XIII
      ITU SPECIFICATIONS FOR FIBRES ...................................................    4

SCHEDULE XIV
      DEED OF COVENANT ................................................................    2

1.    DEFINITIONS .....................................................................    1

2.    TRANSFEREE'S COVENANTS ..........................................................    2

3.    CONTRACTS (RIGHTS OF THIRD PARTIES) ACT 1999 ....................................    2

1.    DEFINITIONS .....................................................................    2

2.    TRANSFEREE'S COVENANTS ..........................................................    3

3.    CONTRACTS (RIGHTS OF THIRD PARTIES) ACT 1999 ....................................    3

APPENDIX A
      VIATEL NETWORK MAP ..............................................................   13

APPENDIX B
      GLOBAL VOICE NETWORK MAP ........................................................   14
</TABLE>

<PAGE>

THIS AGREEMENT is made the 15 day of June 2006

BETWEEN:

(1)   VIATEL HOLDING (BERMUDA) LIMITED (registered in Bermuda under number
      31325) whose registered office is at Cannons Court, 22 Victoria Street,
      Hamilton HM 12, Bermuda ("VIATEL");

(2)   VTL-TP (BERMUDA) LIMITED (registered in Bermuda under number 31334) whose
      registered office is at Cannons Court, 22 Victoria Street, Hamilton HM12,
      Bermuda ("VTL-TP"); and

(3)   GLOBAL VOICE GROUP LIMITED registered as a public limited liability
      company in Singapore under number 199905625E whose registered
      office/principal place of business is at 80 Raffles Place, #31-20 UOB
      Plaza 2, Singapore 048624 ("GLOBAL VOICE").

INTRODUCTION

(A)   Viatel's group companies own, lease and operate a telecommunications
      network running through the UK, France, Belgium, The Netherlands and
      Germany.

(B)   VTL-TP has the right, granted to it by the various asset-owning entities
      within Viatel's group, to use and exploit dark fibre and capacity over the
      Viatel group's network.

(C)   Global Voice owns, leases and operates metropolitan telecommunications
      systems in and around major cities in Western Europe.

(D)   Viatel wishes to have its group companies grant rights over certain assets
      comprised in its network to Global Voice and Global Voice wishes to grant
      to Viatel group companies rights over certain assets comprised in its
      network, for which purpose the parties have agreed upon the following
      associated transactions, terms and conditions.

IT IS AGREED AS FOLLOWS:

1     DEFINITIONS AND INTERPRETATION

1.1   In this Agreement (except where the context otherwise requires) the
      following words shall have the following meanings:

      "ARBITRATION AGREEMENT"      the agreement with that title between all
                                   parties to the Transaction Documents, in the
                                   agreed terms;

      "BUDGET"                     as defined in Clause 9.2.2;

      "BUSINESS DAY"               any day which is not a Saturday, a Sunday, or
                                   a bank or public holiday in England;

                                       1
<PAGE>

      "CLAIMING PARTY"             as defined in Clause 18.2;

      "COMPLETION"                 completion of this Agreement in accordance
                                   with Clause 11;

      "CONTRACT PAYMENTS"          as defined in Clause 7.1;

      "CUSTOMER CONTRACTS"         the contracts in the name of a Viatel Group
                                   Company and a customer of that company, as
                                   listed in Schedule I including any or all
                                   renewals, extensions or variations thereof;

      "DATA ROOM"                  the physical and electronic data rooms made
                                   available by Viatel for the use of Global
                                   Voice and its representatives as described in
                                   the 'Rules of Data Room' signed by Global
                                   Voice on February 23, 2006;

      "DEFAULTING PARTY"           as defined in Clause 9.8;

      "DISPUTE"                    as defined in Clause 22.1;

      "EQUIPMENT COMPANY"          as defined in Clause 10.1;

      "FRANKFURT RING"             the ducts, cables and/or fibres specified in
                                   parts A and B of Schedule IIB;

      "FRENCH NETWORK ASSETS"      the ducts, cables and/or fibres and all
                                   apparatus, equipment, colocation space,
                                   points of presence or other facilities of
                                   whatever nature located in or on, or related
                                   to the operation of, those segments of the
                                   Viatel Network in France, as described in
                                   Schedule III A and as geographically
                                   illustrated in the map included in Appendix
                                   A;

      "FRENCH OPTION"              the Option and Transfer Agreement with
                                   respect to France;

      "FRENCH TRANSFERRED ASSETS"  those French Network Assets described in
                                   Schedule III B and more particularly set out
                                   in the French Option;

      "GERMAN NETWORK ASSETS"      the ducts, cables and/or fibres and all
                                   apparatus, equipment, colocation space,
                                   points of presence or other facilities of
                                   whatever nature located in or on, or related
                                   to the operation of, those segments of the
                                   Viatel Network in Germany, as described in

                                       2
<PAGE>

                                   Schedule II A and as geographically
                                   illustrated in the map included in Appendix
                                   A;

      "GERMAN ASSET LEASE"         a lease agreement with respect to specific
                                   German Network Assets (i) forming part of the
                                   Frankfurt Ring and (ii) leased by VTL Telecom
                                   GmbH from GasLINE;

      "GERMAN OPTION"              the Option and Transfer Agreement with
                                   respect to Germany;

      "GERMAN TRANSFERRED ASSETS"  those German Network Assets described in
                                   Schedule II B and more particularly set out
                                   in the German Option excluding, for the
                                   avoidance of any doubt, the assets the
                                   subject of the GND Asset Transfer;

      "GND ASSET TRANSFER"         an agreement with respect to specific assets
                                   forming part of the Viatel Network in
                                   Germany, between (i) Viatel German Asset
                                   GmbH, VTL, Inc and Viatel Circe Assets
                                   Limited and (ii) Global Voice Networks AG, in
                                   the agreed terms;

      "GROUP COMPANY"              a Viatel Group Company or a GV Group Company;
                                   "Group Companies" shall be construed
                                   accordingly;

      "GV DISCLOSURE LETTER"       the letter of the same date as this Agreement
                                   from Global Voice to Viatel containing
                                   disclosures against the GV Warranties;

      "GV FIBRE TRANSFER           agreement(s) with that title between (i) the
      AGREEMENT"                   GV Group Companies and (ii) the Viatel Group
                                   Companies specified in Clause 4.1, in the
                                   agreed terms;

      "GV GROUP"                   Global Voice, its holding company (if any)
                                   and each subsidiary (whether direct or
                                   indirect) of Global Voice;

      "GV GROUP COMPANIES"         the companies which are members of the GV
                                   Group; "GV Group Company" shall be construed
                                   accordingly;

      "GV NETWORK"                 the network infrastructure in Germany, the
                                   Netherlands and the UK in which GV Group

                                       3
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                                   Companies have ownership rights and other
                                   rights and interests comprising ducts and
                                   optical fibre cables, and all facilities used
                                   in connection with and buildings and
                                   infrastructure used to house, support or
                                   contain such equipment, together with all
                                   related metropolitan networks serving certain
                                   European cities and covering the route and
                                   areas coloured orange on the network map
                                   included in Appendix B;

      "GV OFF-NET BUILDINGS"       those buildings or premises to which Global
                                   Voice will provide access for Viatel to the
                                   GV Network, which are not listed in Schedule
                                   XII;

      "GV ON-NET BUILDINGS"        those buildings and premises that are from
                                   time to time directly connected to the GV
                                   Network and which are listed in Schedule XII;

      "GV TRANSFERRED ASSETS"      the fibre assets agreed to be sold and
                                   transferred to Viatel or any Viatel Group
                                   Companies under this Agreement, including
                                   those described in Clauses 4.1, 4.11 and
                                   4.14;

      "GV WARRANTIES"              the warranties set out in Part III of
                                   Schedule VI;

      "IRU"                        an agreement with respect to the grant of
                                   long-term rights in specific French Network
                                   Assets, between (i) Viatel Operations S.A.
                                   and (ii) the relevant GV Group Company in
                                   France, in the agreed terms;

      "LICENCE AGREEMENT(S)"       the agreement(s) with that title (or local
                                   equivalent) to be entered into by relevant
                                   Viatel Group Companies and relevant GV Group
                                   Companies, in respect of France, Germany and
                                   NBUK, in the agreed terms;

      "NBUK"                       the Netherlands, Belgium and the UK;

      "NBUK NETWORK ASSETS"        the ducts, cables and/or fibres and all
                                   apparatus, equipment, colocation space,
                                   points of presence or other facilities of
                                   whatever nature located in or on, or related
                                   to the operation of, those segments of the
                                   Viatel Network in the NBUK, as described in
                                   Schedule IV A and as geographically
                                   illustrated

                                       4
<PAGE>

                                   in the map included in Appendix A;

      "NBUK ASSET LEASE(S)"        agreement(s) in the agreed terms between,
                                   separately, (i) VTL (UK) Limited, Viatel
                                   Belgium NV, and Viatel Global Communications
                                   BV/Viaphone NV and (ii) Global Voice Networks
                                   Limited, the relevant GV Group Company in
                                   France and Global Voice Networks BV, with
                                   respect to leases of specific NBUK Network
                                   Assets;

      "NBUK OPTION(S)"             Option and Transfer Agreement(s) with respect
                                   to NBUK;

      "NBUK TRANSFERRED ASSETS"    those NBUK Network Assets described in
                                   Schedule IV B and more particularly set out
                                   in the NBUK Options;

      "NETWORK LEASE(S)"           all or any of the NBUK Asset Leases, the
                                   German Asset Lease and the IRU;

      "NETWORK OPERATIONAL         the agreement with that title to be entered
      AGREEMENT"                   into by Viatel with Global Voice in the
                                   agreed terms;

      "NEW EQUIPMENT"              as defined in Clause 10.1;

      "OPERATING CHARGES"          as defined in Clause 9.2;

      "OPERATING COSTS"            the costs of the types itemised in Schedule V
                                   incurred by members of the Viatel Group in
                                   operating the French Network Assets, the
                                   German Network Assets and the NBUK Network
                                   Assets, excluding any incremental operating
                                   costs exclusively incurred by or on behalf of
                                   Viatel Group Companies (i) in connection with
                                   the provision of Viatel Services or (ii)
                                   relating to matters unconnected with the
                                   Viatel Transferred Assets or to Viatel
                                   Services;

      "OPERATIONS COMMITTEE"       the committee with that name established
                                   under the Network Operational Agreement;

      "OPTION AND TRANSFER         agreement(s) with that title between the
      AGREEMENT(S)"                following Viatel Group Companies and GV Group
                                   Companies:

                                   Belgium: Viatel Belgium NV

                                       5
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                                            Global Voice Networks BVBA/NV

                                   France:  Viatel Operations SA
                                            GV Group Company in France

                                   Germany: Viatel German Asset GmbH
                                            VTL, Inc.
                                            Global Voice Networks AG
                                            European Fibre Networks Asset GmbH
                                            European Fibre Networks "GND" GmbH

                                   Netherlands: Viatel Global Communications BV
                                                Global Voice Networks BV and

                                   UK:          VTL (UK) Limited
                                                Global Voice Networks Limited

                                   in the agreed terms;

      "PEN 2"                      that part of the Viatel Network known by the
                                   parties as 'PEN 2' and identified as such on
                                   the network map in Appendix A;

      "RECORDS"                    as defined in Clause 9.9;

      "SHAREHOLDERS AGREEMENT"     a shareholders agreement with respect to the
                                   new company referred to in Clause 10.1, in
                                   the agreed terms or as subsequently modified
                                   by the parties;

      "SITE LEASE AGREEMENT(S)"    agreement(s) with respect to a Viatel Site
                                   between (i) the Viatel Group Company
                                   (designated by Viatel) in a European country
                                   and (ii) the Global Voice Group Company
                                   (designated by Global Voice) in that country,
                                   to be entered into in a form, or
                                   substantially the same form, which is in the
                                   agreed terms;

      "TERM"                       a period of whichever is the shorter of (a)
                                   the last to expire of the term of each of the
                                   individual agreements or instruments entered
                                   into by the Viatel Group Companies and GV
                                   Group Companies pursuant to Clauses 2.1 to
                                   2.3 inclusive and (b) one hundred years from
                                   the date of Completion;

                                       6
<PAGE>

      "TRANSACTION DOCUMENTS"      this Agreement, the Network Leases, the
                                   Option and Transfer Agreements, the GND Asset
                                   Transfer, the Network Operational Agreement,
                                   the Licence Agreements and Site Lease
                                   Agreements;

      "VIATEL ASSETS"              together, the French Network Assets, the
                                   German Network Assets and the NBUK Network
                                   Assets;

      "VIATEL DISCLOSURE LETTER"   the letter of the same date as this Agreement
                                   from Viatel to Global Voice containing
                                   disclosures against the Viatel Warranties;

      "VIATEL GROUP"               Viatel and each subsidiary (whether direct or
                                   indirect) of Viatel;

      "VIATEL GROUP COMPANIES"     the companies which are members of the Viatel
                                   Group; "Viatel Group Company" shall be
                                   construed accordingly;

      "VIATEL NETWORK"             the network infrastructure in and between
                                   Belgium, France, Germany, the Netherlands and
                                   the UK in which Viatel Group Companies have
                                   ownership rights and other rights and
                                   interests comprising ducts, optical fibre
                                   cables and submarine cables, and all
                                   facilities and other equipment used in
                                   connection with such infrastructure, and
                                   buildings used to house, support or contain
                                   such equipment, together with all related
                                   metropolitan networks serving certain
                                   European cities and covering the route and
                                   areas included on the network map in Appendix
                                   A;

      "VIATEL RETAINED ASSETS"     the Viatel Network excluding the Viatel
                                   Transferred Assets;

      "VIATEL SERVICES"            telecommunication services provided by Viatel
                                   Group Companies to their customers using
                                   Viatel Retained Assets;

      "VIATEL SHARED CHAMBERS"     means all splice chambers, handholes and
                                   other forms of enclosure now installed on the
                                   Viatel Network that provide access to the
                                   Viatel Transferred Assets;

      "VIATEL SITES"               premises occupied or used by Viatel at points
                                   of presence, multi-optical repeater stations
                                   and

                                       7
<PAGE>
                                   regeneration sites on the Viatel Network as
                                   more particularly described in Schedule VII;

      "VIATEL TRANSFERRED ASSETS"  collectively, the assets the subject of the
                                   Network Leases and, as and from the times
                                   when the options in each of the Option and
                                   Transfer Agreements are duly and fully
                                   exercised, the French Transferred Assets, the
                                   German Transferred Assets and the NBUK
                                   Transferred Assets;

      "VIATEL WARRANTIES"          the warranties set out in Part I of Schedule
                                   VI;

      "VTL-TP CAPACITY"            rights to dark fibre and capacity in the
                                   Viatel Network which VTL-TP has under
                                   agreements with other Viatel Group Companies;
                                   and

      "WARRANTIES"                 the Viatel Warranties and the GV Warranties;
                                   and

      "WARRANTY CLAIM(S)"          any claim by any party in respect of any of
                                   the Warranties or any of the warranties in
                                   the Network Leases or the Option and Transfer
                                   Agreements.

1.2   In this Agreement (except where the context otherwise requires):

      1.2.1  any reference to a recital, clause or schedule is to the relevant
             recital, clause or schedule of or to this Agreement;

      1.2.2  the clause headings are included for convenience only and shall not
             affect the interpretation of this Agreement;

      1.2.3  use of the singular includes the plural and vice versa;

      1.2.4  use of any gender includes the other genders;

      1.2.5  any reference to "persons" includes individuals, firms,
             partnerships, companies, corporations, associations, organisations,
             foundations and trusts (in each case whether or not having separate
             legal personality);

      1.2.6  a reference to "writing" does not include email;

      1.2.7  the words "subsidiary" and "holding company" have the meanings
             given to them by section 736 of the UK Companies Act 1985;

      1.2.8  any reference to a person being an "associate" of another shall be
             interpreted in accordance with section 435 of the Insolvency Act
             1986, and a person shall be

                                       8
<PAGE>

             regarded as "connected" or "associated" with any person which is an
             associate of his and with any company of which any director is an
             associate of his;

      1.2.9  a reference to a statute or statutory provision is a reference to
             that statute or statutory provision and to all orders, regulations,
             instruments or other subordinate legislation made under the
             relevant statute;

      1.2.10 any reference in this Agreement to any statute, statutory
             provision, subordinate legislation, code or guideline
             ("LEGISLATION") is a reference to such legislation as the same may
             from time to time be amended, modified, extended, varied,
             superseded, replaced, substituted or consolidated;

      1.2.11 any phrase introduced by the terms "including", "include", "in
             particular" or any similar expression shall be construed as
             illustrative and shall not limit the sense of the words preceding
             those terms;

      1.2.12 the word "incremental", as used in the definition of "Operating
             Costs", means exclusively caused by the relevant party (i) of its
             own volition enhancing or adding to its network assets or (ii)
             taking on a new customer after the date hereof or (iii) enhancing
             or adding to the service of an existing customer as of the date
             hereof;

      1.2.13 the expression "in the agreed terms" means terms approved by the
             parties and initialled by them on the date hereof for the purposes
             of identification;

      1.2.14 any reference in this Agreement to either party procuring any
             action shall be construed as referring to that party procuring that
             the relevant action be taken by its subsidiary or subsidiaries
             which have the necessary rights and powers to discharge the
             obligation; where so indicated in the text, such action shall be
             through entry by the relevant subsidiary into an agreement or other
             instrument valid and effective under the laws of the relevant
             jurisdiction; and

      1.2.15 references to "party" or "parties" herein shall, unless the context
             expressly requires otherwise, be treated as referring only to
             Viatel and Global Voice.

1.3   The schedules and recitals form part of this Agreement and shall have
      effect as if set out in full in the body of this Agreement and any
      references to this Agreement includes the schedules and recitals.

1.4   In the event of any ambiguity or conflict arising between the provisions
      of Clause 2, 4 and 5 of this Agreement and the provisions in any schedule
      or in any agreement or other instrument entered into by the parties to
      implement such provisions, the provisions in such other agreement or
      instrument shall prevail.

1.5   VTL-TP is a party to this Agreement only for the purposes referred to in
      Clauses 2.5 and 9.2, and shall have no other rights or liabilities under
      this Agreement.

                                       9
<PAGE>

2     GRANT OF RIGHTS OVER VIATEL INFRASTRUCTURE

2.1   With respect to NBUK, the relevant Viatel Company in each country shall
      enter into the NBUK Asset Lease within five (5) Business Days of the date
      hereof. Having at the date hereof already agreed all material points dealt
      with in its provisions, the parties agree they will use their best
      endeavours to finalise this document without delay and in any event within
      such period.

2.2   With respect to France, Viatel Operations SA shall enter into the IRU
      within three (5) Business Days of the date hereof. Having at the date
      hereof already agreed all material points dealt with in its provisions,
      the parties agree they will use their best endeavours to finalise this
      document without delay and in any event within such period.

2.3   With respect to Germany, Viatel German Asset GmbH, VTL Telecom GmbH and
      VTL, Inc shall enter into the German Asset Lease within five (5) Business
      Days of the date hereof. Having at the date hereof already agreed all
      material points dealt with in its provisions, the parties agree they will
      use their best endeavours to finalise this document without delay and in
      any event within such period.

2.4   With respect to Germany, and subject as provided in Clause 4.9, Viatel
      German Asset GmbH and VTL, Inc shall also enter into the GND Asset
      Transfer within five (5) Business Days of the date hereof. Having at the
      date hereof already agreed all material points dealt with in its
      provisions, the parties agree they will use their best endeavours to
      finalise this document without delay and in any event within such period.

2.5   In support of the transactions referred to in Clauses 2.1 to 2.3
      inclusive, and for the consideration referred to in Clause 9.1 and
      specified in Schedule X, VTL-TP hereby relinquishes its rights in the
      VTL-TP Capacity to the extent only necessary to enable Viatel to perform
      its obligations under this Agreement.

2.6   Following Completion, it being acknowledged by both parties that in order
      for the Viatel Group Companies to be able to perfect the rights, titles
      and interests expressed to be granted or made available to, or conferred
      on, GV Group Companies with respect to the Viatel Transferred Assets under
      the Transaction Documents, the Viatel Group Companies would be obliged to
      seek and obtain consents and agreements from other persons including
      landowners, and that these consents and agreements have not so far been
      fully identified or obtained, the parties will cooperate and exchange
      opinions at their own expense with a view to identifying and understanding
      any perceived defects and other problems with respect to the title and
      other rights of Viatel Group Companies in and in relation to the Viatel
      Transferred Assets. The parties will then try to agree ways of resolving
      or overcoming such issues and an approach and terms for its implementation
      and Viatel will use all reasonable endeavours to obtain and procure those
      consents and agreements which the parties agree are material and
      desirable.

                                       10
<PAGE>

      Global Voice shall consult Viatel prior to communicating with any owner of
      rights in or over land relevant to the Viatel Transferred Assets, with
      respect to matters of the kind mentioned in this Clause 2.6.

      For the avoidance of any doubt, as the 'Viatel Transferred Assets' do not
      include those assets the subject of the GND Asset Transfer, the provisions
      of this Clause 2.6 shall not apply to the GND Asset Transfer or its
      subject matter.

2.7   Viatel hereby undertakes not knowingly to do any voluntary act or omission
      with respect to any contract or other arrangement between a Viatel Group
      Company and any other person which would result in premature termination
      of rights granted under such contract or arrangement which rights relate
      to or affect any proprietary interest of a GV Group Company (including any
      leasehold interest) in any of the Viatel Transferred Assets.

2.8   With respect to any of the Viatel Transferred Assets which at the date
      hereof are leased to a Viatel Group Company by any other person, to the
      extent that such Viatel Group Company has at any time the right to renew
      or extend the relevant third party lease and chooses to do so, Viatel
      shall consult Global Voice in such connection and, if so requested by
      Global Voice, use its reasonable endeavours to procure a similar renewal
      or extension of the rights granted to the relevant GV Group Company under
      this Agreement in respect of such assets. (The costs of obtaining such
      renewal or extension, and of any necessary consents in such connection,
      shall be shared by the parties in proportion to their respective interests
      in the subject matter of such renewal or extension). In the event that
      such Viatel Group Company shall choose not to extend or renew such third
      party leases then Viatel will, if so requested by Global Voice, use its
      reasonable endeavours to procure that the relevant GV Group Company be
      granted a renewal or extension of its equivalent rights on as near as
      practicable such terms as would have been available to the Viatel Group
      Company concerned. Any and all costs and expenses of any such renewal or
      extension shall be borne by Global Voice.

      For the purposes of this sub-clause 2.8, the words "leased", "leases" and
      "lease" shall include rights under agreements between any Viatel Group
      Company and other persons subject to definite duration and/or terminable
      by the grantor, which give any Viatel Group Company rights and/or
      interests in or over ducts or cables, and any rights to install and
      maintain such ducts or cables on, under or over land.

2.9   Viatel agrees to grant or procure the grant by Viatel Group Companies to
      Global Voice or any of its designated GV Group Companies of communications
      capacity (determined by the cards and slots utilised by GV Group
      Companies) over Viatel Retained Assets and the right to connect their
      equipment to such Viatel Retained Assets through installing line cards in
      Viatel's own transmission equipment on the following terms:

      2.9.1  the installation and ongoing support work shall be carried out by
             Viatel on behalf and for the cost (to be charged for the relevant
             activities as specified below) of the relevant GV Group Company;

                                       11
<PAGE>

      2.9.2  the relevant GV Group Company shall obtain and pay for all cards
             and other equipment, racks and rack space, which it requires to
             have installed or to use for such purpose; and

      2.9.3  Viatel shall provide to GV Group Companies free of charge slots
             (for installation of cards) in its transmission equipment up to the
             limits specified below, namely:

             EIs:       maximum of 20 slots per city

             DS3s:      maximum of 5 slots per city

             STMIs:     maximum of 2 slots per city in Frankfurt, Dusseldorf,
                        Mannheim London and Paris; 8 per city in all other city
                        networks

             STM16:     maximum of 1 slot per city (as one long-distance circuit
                        or multiple short hops),

             with additional chassis to be charged for by Viatel at cost plus
             15% or procured separately by GV Group Companies.

             For the avoidance of any doubt, one slot is required either to
             originate or terminate a circuit.

      2.9.4  For the above purposes:

             (a)  "city" means, unless otherwise stated, each and any of the
                  following:-

                  London                         Dusseldorf

                  Paris                          Mannheim

                  Amsterdam                      Frankfurt

                  Brussels                       Strasbourg

             (b)  costs of activities as referred to in Clause 2.9.1 shall be
                  determined as follows:

                  -     Circuit-provisioning activity on Nortel transmission
                        equipment and support systems, at an hourly rate of
                        (Pound)45 per hour and capped at (Pound)2,000 per
                        circuit;

                  -     'Trouble-ticket' resolution related to GV circuits, at
                        an hourly rate of (Pound)45 per hour;

                  -     Engineering time to design and implement new Nortel
                        chassis purchased by GV, at an hourly rate of (Pound)80
                        per hour and no more than (Pound)3,000 per chassis.

                                       12
<PAGE>

                  All of the above rates shall be subject to inflation-linked
                  increases as detailed in Schedule IX.

2.10  The Viatel Warranties shall apply to the Viatel Transferred Assets subject
      as provided in the Viatel Disclosure Letter and to the qualifications,
      limitations and exceptions in Part II of Schedule VI.

2.11  On Completion all risks in relation to the Viatel Transferred Assets shall
      pass respectively to each of the GV Group Companies. As a consequence, and
      for the avoidance of any doubt, in the event that at any time after
      Completion any of the Viatel Transferred Assets shall be damaged or
      destroyed (other than as a consequence of the negligence or default of
      Viatel, its employees or agents), their repair or replacement shall be the
      sole responsibility and at the cost of the GV Group Companies. Except in
      any case where the damage or destruction has been caused by the negligence
      or default of Viatel, its employees or agents, to the extent that any such
      damaged Viatel Transferred Assets shall not be repaired by Global Voice,
      the Warranties and obligations of Viatel and of other Viatel Group
      Companies under the Transaction Documents shall be deemed modified and
      qualified accordingly and to the extent that any destroyed Viatel
      Transferred Assets shall not be replaced they shall be deemed excluded
      therefrom.

      In any case where the Viatel Transferred Assets are so damaged or
      destroyed and in order to pursue its claims(s) as a consequence Global
      Voice or any GV Group Company requires the assistance of Viatel or any
      other Viatel Group Company in lending its name to any such claim(s) or
      proceedings in pursuit thereof, on the request of Global Voice Viatel
      shall lend its name (or procure the relevant Viatel Group Company lends
      its name) and give all such reasonable assistance in such connection, all
      at the cost and expense of Global Voice or the relevant other GV Group
      Company.

      In any case where the Viatel Transferred Assets and the Viatel Retained
      Assets shall be damaged or destroyed as a consequence of the same incident
      or series of incidents, the parties shall consult and cooperate and seek
      agreement on the most cost-effective and efficient way of managing and
      pursuing their claims against other persons with respect to such
      incident(s).

3     GLOBAL VOICE RIGHTS OF ACCESS TO VIATEL SITES AND VIATEL TRANSFERRED
      ASSETS

3.1   Global Voice and its relevant GV Group Companies shall have the right to
      access and occupy space in the Viatel Sites (as such space is identified
      in Schedule VII) upon the terms of the Site Lease Agreement for the
      relevant country subject as follows:

      3.1.1  each Site Lease Agreement shall confer a leasehold interest or
             nearest equivalent under local applicable law, and be subject to
             the requirements of local applicable law, landlords' consents
             and/or requirements, and covenants or other obligations or
             restrictions affecting Viatel or its relevant Group Company's
             title;

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<PAGE>

      3.1.2  in the case of sites where Viatel has freehold or other full
             ownership rights Viatel or the relevant Viatel Group Company in the
             relevant country shall enter into a Site Lease Agreement on
             Completion. In all other cases, prior to the execution of a Site
             Lease Agreement, Viatel shall use reasonable endeavours and the
             parties shall cooperate and give each other reasonable assistance
             in order to obtain any consents or permits necessary to ensure that
             entry into that Site Lease and granting Global Voice access to the
             relevant Viatel Site will not put Viatel in breach of any
             contractual or other obligation to a third party property owner or
             otherwise;

      3.1.3  Global Voice shall bear and agree to indemnify Viatel against any
             costs or charges incurred or demanded for the grant of such
             consents or permits, provided that Viatel shall have consulted with
             Global Voice on any such amounts which exceed (euro)5,000.

      3.1.4  pending obtaining such consents or permits and entry into a Site
             Lease Agreement in any particular case, to the extent legally
             permissible Viatel shall enter into a Licence Agreement, provided
             such entry does not put Viatel in breach as mentioned above.

3.2   Without limitation to any of its rights and obligations under the Network
      Operational Agreement, and subject to its compliance with the Access
      Procedures as defined in the Network Operational Agreement, it is agreed
      that Global Voice shall have access to, and the right to use up to
      one-half of the space in, all Viatel Shared Chambers as from the date of
      Completion. In the event that one-half of such space is not available due
      to existing use, the Operations Committee shall meet to determine the
      allocation of equivalent alternative space.

3.3   All other obligations, terms and conditions applicable to Global Voice's
      access to the Viatel Transferred Assets are set out in the Network
      Operational Agreement.

4     GLOBAL VOICE FIBRE TRANSFERS

4.1   Subject as provided in Clause 4.2, Global Voice and/or relevant GV Group
      Companies shall grant to VTL (UK) Limited in the UK, Viatel Global
      Communications BV in the Netherlands and VTL Telecom GmbH in Germany title
      to, or other equivalent of full ownership as is specified in the relevant
      GV Fibre Transfer Agreements, five (5) fibre pairs in the respective
      portion(s) of the GV Network detailed in Schedule VIII in accordance with
      the delivery allocation and on the terms set out in Clause 4.4 as well as
      the provisions of Clause 4.8.

4.2   In the case of the portions of the GV Network in the UK and described in
      the GV Fibre Transfer Agreement applicable to the UK, the sale and
      transfer of five (5) fibre pairs to VTL (UK) Limited shall be subject to
      the particular arrangements and terms and conditions set out therein.

                                       14
<PAGE>

4.3   The grants in Clause 4.1 shall be assured and perfected by the entry by
      Global Voice, with each of the Viatel Group Companies specified in Clause
      4.1, into the GV Fibre Transfer Agreements.

4.4   The delivery allocation referred to in Clause 4.1 is as follows:

      4.4.1  those fibre pairs identified in the GV Fibre Transfer Agreements
             for sale and transfer as of Completion, on Completion; and

      4.4.2  the remaining fibre pairs, as so identified, on 2 January 2007.

4.5   On the date of signing of this Agreement, Global Voice shall deliver to
      Viatel the GV Fibre Transfer Agreement for the UK duly executed by Global
      Voice Networks Limited. Within five (5) Business Days of the date hereof
      Global Voice shall procure delivery to Viatel of the other two (2) GV
      Fibre Transfer Agreements(s) (for the Netherlands and Germany) duly
      executed by the relevant GV Group Company. Having at the date hereof
      already agreed all material points dealt with in their provisions (save in
      respect of the Netherlands, which agreement will be in substantially the
      same form as the GV Fibre Transfer Agreement for the UK), the parties
      agree they will use their best endeavours to finalise these documents
      without delay and in any event within such period.

4.6   On Completion or (in the case of the fibre pairs referred to in Clause
      4.4.2) on delivery of fibre pairs to Viatel under the relevant GV Fibre
      Transfer Agreements, property and risk in the five (5) fibre pairs
      referred to in this Clause 4 shall pass to Viatel.

4.7   Global Voice hereby undertakes not knowingly to do or omit to do anything
      that would adversely affect the rights and interests granted to Viatel
      under the GV Fibre Transfer Agreement(s) in the period from the date of
      this Agreement to 2 January 2007 and, in particular, not to grant to any
      other person ownership or other rights or interests in the fibres so
      allocated.

4.8   The GV Warranties in Part III of Schedule VI shall apply to the rights and
      interests granted to Viatel under the GV Fibre Transfer Agreement(s)
      subject as provided in the GV Disclosure Letter and to the qualifications,
      limitations and exceptions in Part IV of that Schedule, save that the
      period for notice of any Warranty Claim in respect of the fibres referred
      to in Clause 4.4.2 shall run from 2 January 2007 to 31 July 2008 and
      paragraph 3 of Part IV of Schedule VI shall be construed accordingly.

4.9   Following Completion, it being acknowledged by both parties that in order
      for Global Voice to be able to perfect the rights, titles and interests
      expressed to be granted or made available to, or conferred on, Viatel
      under the Transaction Documents, Global Voice would be obliged to seek and
      obtain consents and agreements from other persons including landowners,
      and that these consents and agreements have not so far been fully
      identified or obtained, the parties will cooperate and exchange opinions
      at their own expense with a view to identifying and understanding any
      perceived defects and other problems with respect to the title and other
      rights of Global Voice and GV Group

                                       15
<PAGE>

      Companies in and over the GV Transferred Assets. The parties will then try
      to agree ways of resolving or overcoming such issues and an approach and
      terms for its implementation and Global Voice will use all reasonable
      endeavours to obtain those consents and agreements which the parties agree
      are material and desirable.

4.10  Global Voice hereby undertakes not knowingly to and shall procure that the
      other GV Group Companies do not knowingly do any voluntary act or omission
      with respect to any contract or other arrangement between a GV Group
      Company and any other person which would result in premature termination
      of rights granted under such contract or arrangement which rights relate
      to or affect any proprietary interest of Viatel (including any leasehold
      interest) in any of the GV Transferred Assets.

4.11  Global Voice shall procure the grant to VTL Telecom GmbH of indefeasible
      rights of use in three dark fibre pairs comprised in the assets the
      subject of the GND Asset Transfer, for the period(s) and in accordance
      with the terms and conditions contained in the German Option and together
      with rights to colocation and other operational space in points of
      presence and other telecommunications facilities as provided for in the
      German Option. Global Voice shall provide maintenance services with
      respect to such fibre pairs using reasonable care and skill and in
      accordance with good telecommunications industry practice and which
      services shall be similar or equivalent to the GV Core Operational
      Services as defined in the Network Operational Agreement PROVIDED THAT
      such services shall be at Global Voice's cost and free of charge to Viatel
      for a period of ten years from the date of provision in each case of such
      fibre pairs to Viatel. Thereafter Viatel shall be obliged to pay its fair
      pro rata proportion of Global Voice's relevant maintenance costs with
      respect to such services, in default of which either party may terminate
      on notice the provision of maintenance services with respect to the fibre
      pairs in question.

4.12  Global Voice shall charge to the Viatel Group Companies and Viatel shall
      procure that they pay to Global Voice, as from the date of execution and
      delivery of the GV Fibre Transfer Agreements in each case, the pro rata
      share of Global Voice's reasonable maintenance costs associated with the
      GV Transferred Assets PROVIDED THAT the liability of the Viatel Group
      Companies for such costs shall not together exceed in aggregate E70,000
      in any calendar year. Such maximum shall be subject to inflation-linked
      increases as detailed in Schedule IX.

4.13  Global Voice shall provide to or procure for Viatel Group Companies access
      to GV On-Net Buildings at preferential pricing. For such purpose the
      parties have agreed that, as of Completion (or as soon as is reasonably
      practicable thereafter), Global Voice will provide to Viatel Group
      Companies access to those GV On-Net Buildings listed in Schedule XII at
      the respective costs specified in such schedule. Viatel and any of its
      Group Companies shall also have the right, at any time, to request the
      provision of access to GV Off-Net Buildings at cost plus 15%.

                                       16
<PAGE>

      All other rights, obligations, terms and conditions applicable to Viatel
      Group Companies' access to the GV Transferred Assets are set out in the
      Network Operational Agreement.

4.14  Global Voice shall on the request of Viatel at any time offer or procure
      the offer by GV Group Companies to Viatel or any of Viatel's Group
      Companies of (at Viatel's option) title to or a lease of a maximum two
      further fibre pairs per city (the number requested to be determined by
      Viatel at its discretion) for a period of ten (10) years less one (1) day
      over those parts of the GV Network where, as at the date of Completion, GV
      Group Companies have installed fibres. Such fibre pairs shall be at a
      price representing the best price offered or sold to any person who or
      which is not a GV Group Company during the 18 months prior to such offer
      to Viatel being made and Global Voice shall thereafter maintain or procure
      maintenance of its pricing as the best price so offered to any non-GV
      Group Company at any time. All other terms applicable shall be in
      accordance with the terms set out in the GV Fibre Transfer Agreements.

4.15  With respect to parts of the GV Network from time to time developed or
      acquired by GV Group Companies after the date hereof, on the request of
      any Viatel Group Company at any time Global Voice shall offer or procure
      the offer by GV Group Companies to Viatel or any of the Viatel Group
      Companies of (at Viatel's option) title to or a lease for a period of ten
      (10) years less one (1) day of a maximum two further fibre pairs per city
      (the number requested to be determined by Viatel at its discretion)
      wherever Global Voice or any relevant GV Group Company shall have fibres
      available for such purpose. Such offer shall be at the same price as is
      mentioned in Clause 4.14.

4.16  Global Voice shall provide to Viatel at six-monthly intervals information
      on any planned build-out of fibre (excluding customer-specific or
      confidential build-outs) in any section of the GV Network and shall,
      whenever requested by Viatel, confirm the availability of fibre pairs on
      the GV Network and the applicable best pricing providing, if so required
      by Viatel, appropriate documentary evidence to support such pricing.

4.17  Global Voice shall provide or procure through GV Group Companies access
      for Viatel Group Companies with respect to fibre pairs sold or leased
      pursuant to Clauses 4.15 and 4.16 upon Global Voice's standard terms and
      conditions for access to land and buildings provided that GV Group
      Companies shall be under no obligation to grant rights of access any
      greater than those enjoyed by GV Group Companies themselves.

5     OPTIONS

      Viatel and Global Voice shall each procure entry by the relevant (for each
      country) Viatel Group Companies with the GV Group Companies into the
      relevant Option and Transfer Agreements.

6     RIGHTS OF VIATEL IN VIATEL TRANSFERRED ASSETS

6.1   In the event that, with respect to a particular sub-duct or duct comprised
      in the Viatel Transferred Assets and identified by reference to this
      Clause in any of Schedules II B, III

                                       17
<PAGE>

      B or IV B, Global Voice or another GV Group Company shall decide to
      install one or more cables in its last sub-duct or (if there shall be no
      sub-ducts) duct available for installation of cables(s), Global Voice
      shall or shall procure that before so doing it shall inform Viatel by
      notice in writing and there shall be a period of not less than thirty (30)
      days for discussion between the parties with a view to Viatel deciding
      whether or not it would wish to have its own cable(s) installed in the
      relevant sub-duct or duct.

6.2   In the event that, with respect to any particular duct comprised in the
      Viatel Transferred Assets and identified by reference to this Clause in
      any of Schedules II B, III B or IV B, which duct is the last duct
      available for installation of cable(s), Global Voice or another GV Group
      Company shall decide to install one or more sub-ducts in such duct, Global
      Voice shall or shall procure that before so doing it shall inform Viatel
      by notice in writing and there shall be a period of not less than thirty
      (30) days for discussion between the parties with a view to Viatel
      deciding whether or not it would wish to have its own sub-ducts installed
      in the relevant duct and, where applicable, cables in those sub-ducts.

6.3   Where Viatel decides it does wish to install its own cable(s) and/or
      sub-ducts pursuant to Clause(s) 6.1 and/or 6.2, it shall so inform Global
      Voice as soon as practicable and, before Global Voice or another GV Group
      Company installs its own cable and/or sub-ducts (as the case may be), the
      parties shall in good faith and acting reasonably negotiate the terms of
      an arrangement for such work and the allocation of costs and/or discuss
      and agree the detailed procedures in the Operations Committee.

7     BENEFIT OF CUSTOMER CONTRACTS

7.1   In consideration of the payments specified in Schedule X and other good
      and valuable consideration provided to Viatel hereunder, Viatel shall
      remit or procure remittance to Global Voice of the receipts arising from
      the Customer Contracts (excluding VAT) and after deduction of the cost
      items as specified in Schedule I ("CONTRACT PAYMENTS"). For the avoidance
      of doubt, the Customer Contracts will continue to be performed by the
      Viatel Group Companies.

7.2   Viatel shall pay the Contract Payments to Global Voice monthly.

8     NETWORK OPERATIONAL AGREEMENT

      At Completion the parties shall enter into the Network Operational
      Agreement.

9     CONSIDERATION PAYMENTS AND PAYMENT PROCEDURES

9.1   In consideration of the rights granted and to be procured by Viatel under
      Clauses 2, 5 and 7, on Completion Global Voice shall pay to the Viatel
      Group Companies party to the Transaction Documents the aggregate amount of
      E18.5 million in cash divided between the Viatel Group Companies listed
      in Schedule X in the amounts set out therein.

                                       18
<PAGE>

9.2   In consideration of Viatel's agreement to enter into the Network
      Operational Agreement, the Site Lease Agreements and the Licence
      Agreements and as from the expiry of a period of twelve (12) months from
      the date of Completion, Global Voice shall pay to VTL-TP amounts
      equivalent to one-half of the total Operating Costs ("OPERATING CHARGES")
      subject as follows:

      9.2.1  the Operating Charges shall be subject to an annual maximum of
             (euro)4.1 million, which maximum shall itself be subject to
             increase according to any cost increases imposed on Viatel through
             inflation mechanisms in (i) contracts and (ii) other arrangements
             with its suppliers;

      9.2.2  the Operating Charges shall be paid monthly in advance in equal
             instalments and shall be set according to a budget agreed in
             writing for Viatel's total Operating Costs by the parties prior to
             January in each year (the "BUDGET");

      9.2.3  pending the parties' agreement on the Budget, Global Voice agrees
             to pay, as a minimum in each twelve (12) month period commencing on
             and from the first anniversary of the date of Completion, the
             Operating Charges applicable to the previous twelve (12) month
             period. In respect of the first twelve (12) month period for which
             Global Voice is liable to pay Operating Charges, Global Voice shall
             pay, in respect thereof, in twelve (12) equal (or as equal as may
             be) monthly instalments, one-half of the total Operating Costs set
             out in the Budget as agreed by the parties for that period or, in
             the absence of such agreement, (euro)4.1 million;

      9.2.4  there shall be a reconciliation of Operating Charges paid against
             actual Operating Costs at or as soon as practicable after the end
             of each half-year, with appropriate adjustment for cost increases
             or decreases not included or anticipated in the Budget for that
             year and appropriate balancing payments or credits then to be made
             or provided by one party to the other as appropriate;

      9.2.5  in the event the parties shall fail in any year to reach agreement
             on the Budget, the matter shall be escalated to the Chief Financial
             Officer of both parties and, if they shall be unable to resolve the
             matter, to the Chief Executive Officer of each party; and

      9.2.6  if those Officers shall also be unable to reach agreement, the
             parties will attempt to settle it by mediation in accordance with
             the CEDR Model Mediation Procedure which Procedure is deemed to be
             incorporated by reference into this Clause. Unless otherwise agreed
             by the parties, the mediator will be nominated by CEDR.

      9.2.7  Where the parties cannot settle the matter by mediation, the matter
             shall be referred by either party for determination to:

             9.2.7.1    a person agreed by the parties; or

                                       19
<PAGE>

             9.2.7.2    in default of agreement within five (5) days of a notice
                        from either party to the other calling upon the other so
                        to agree, a person chosen on the application of either
                        party by the President for the time being of the
                        Institute of Chartered Accountants in England and Wales.

      9.2.8  Such person:

             9.2.8.1    shall act as an expert and not as an arbitrator;

             9.2.8.2    shall decide on the procedure to be followed in the
                        determination (provided that, in any event, he shall
                        give all parties the full opportunity of making such
                        representations as they may reasonably require) and be
                        required to deliver his determination in writing to the
                        parties within four (4) weeks of this appointment.

      9.2.9  In the absence of manifest error or fraud, the decision of such
             expert shall be final and binding. The costs of such expert shall
             be allocated for payment by either or both of the parties in the
             expert's discretion. In default of determination by the expert on
             costs these shall be borne equally by the parties. Each party shall
             provide to the expert all information and documents reasonably
             requested by him to aid his determination of the matter.

9.3   Within four (4) weeks following the end of each calendar quarter during
      the Term, Viatel shall send to the relevant GV Group Company at the
      address specified in Clause 19.2, or such other address notified to Viatel
      for this purpose, a statement showing in reasonable detail the Operating
      Costs incurred and paid by Viatel for the preceding calendar quarter.

9.4   In the event that, whether through a court judgment, settlement of legal
      proceedings or agreement being reached by Viatel Operations S.A. with
      relevant landowners and/or owners of the public domain, fees become,
      and/or are deemed retrospectively to have been, payable and due for
      payment by Viatel Operations S.A. for rights of way with respect to the
      infrastructure constituting or supporting any of the French Network Assets
      (including any fees that might be or become payable, with respect to the
      French Transferred Assets, to any of Voies Navigable de France, Ville de
      Paris and SAGEP or any related entity of any of those organisations as a
      result of the legal proceedings existing at the date of this Agreement, to
      which Viatel Operations SA is a party), Global Voice shall pay and
      reimburse to Viatel, within thirty (30) days of the date of a duly
      itemised invoice from Viatel, half such fees from time to time arising as
      from the date of Completion subject to a maximum E1,276,000 per annum
      PROVIDED THAT prior to any such settlement or agreement Viatel will, so
      far as reasonably practicable, have consulted Global Voice with relevant
      details of the proposal.

9.5   The parties shall use and continue to use all reasonable endeavours to
      reduce the operational overheads relating both to the Viatel Transferred
      Assets and the Viatel Retained Assets during the twelve (12) months
      following Completion and, in particular, Viatel shall procure
      implementation of all reasonable suggestions by Global Voice which

                                       20
<PAGE>

      result in the reduction of overheads on the Viatel Transferred Assets,
      provided that Viatel shall be under no obligation to procure any such
      suggested action which it reasonably considers may adversely impact on the
      provision of Viatel Services and/or increase the operating costs
      associated with the rest of the Viatel Network, and provided further that
      Global Voice will reimburse promptly on request to Viatel or as Viatel
      directs such proportion of the costs Viatel reasonably incurs in
      undertaking any such action as relates to the proportion of the overall
      savings applicable to Global Voice.

9.6   Global Voice will be responsible for and discharge all costs and expenses
      which are incurred by, or on behalf or at the request of, Global Voice in
      connection with the Viatel Transferred Assets (excluding services forming
      part of the Viatel Core Operational Services (as defined in the Network
      Operational Agreement)) and/or the provision of services by Global Voice
      including making any additional fibres operational and/or supporting
      additional customer business, provided that where any such costs are not
      directly incurred by Global Voice, such costs are at all times approved in
      writing in advance by Global Voice.

9.7   All the consideration specified in and payable to the Viatel Group
      Companies under this Agreement is net of all taxes, duties, levies and
      withholdings of any nature wheresoever created or imposed and, without
      limitation to the generality of the foregoing, Global Voice shall be
      responsible and liable for all charges, commissions, stamp duties, sales
      and transfer tax (including Value Added Tax) or their equivalent in any
      relevant jurisdiction, which may arise or be levied on or as a result of
      and/or in consequence of this Agreement and the Transaction Documents,
      excepting the GV Fibre Transfer Agreements. As soon as practicable after
      the date hereof and prior to Completion the parties shall agree upon
      appropriate valuations of the Viatel Transferred Assets and of the GV
      Transferred Assets to apply for the purposes of all such taxes, duties and
      other levies. Global Voice shall procure that Value Added Tax payable by
      any GV Group Company with respect or pursuant to any of the Transaction
      Documents shall be paid by it promptly on presentation of the appropriate
      tax invoice.

9.8   If either party (the "DEFAULTING PARTY") fails to pay by the due date any
      amount payable by it under this Agreement, the other party shall be
      entitled but not obliged to charge the Defaulting Party interest on the
      overdue amount, payable by the Defaulting Party immediately on demand,
      from the due date up to the date of actual payment, after as well as
      before judgment, at the rate of 5 per cent per annum above the base rate
      for the time being of Barclays Bank. Such interest shall accrue on a daily
      basis and be compounded quarterly.

9.9   Each party shall nominate a place of business at which it shall keep
      separate, complete and accurate books of account and records of all its
      costs and expenses which relate to or affect the provisions of Clauses
      4.12, 7.1, 9.2, 9.4 and 9.6 of this Agreement ("RECORDS"). A party shall
      nominate a place of business for the purpose of this Clause 9.9 by notice
      given to the other party in accordance with Clause 19. Each party shall
      procure that the other party's representatives have reasonable access to
      its principal

                                       21
<PAGE>

      place of business to inspect and audit the Records (with the right to make
      copies and take excerpts) upon reasonable notice during normal business
      hours during and up to three (3) years after issue of any relevant invoice
      under or in respect of the Clauses referred to above. Any dispute as to
      the Records or their contents shall be referred to and resolved by the
      decision of a single independent chartered accountant whose decision shall
      be final and binding and who shall be appointed by agreement between the
      parties, such agreement not to be unreasonably withheld or delayed. In the
      event of their failure to agree on such appointment the accountant shall
      be appointed by the President for the time being of the Institute of
      Chartered Accountants in England and Wales.

9.10  Subject as provided in Clause 9.7, all payments referred to in this
      Agreement and in the Transaction Documents are stated exclusive of value
      added tax and all other similar taxes and duties payable in respect of
      such payments. References in this Clause 9.10 to "payments" include
      non-cash consideration and expressions bearing the same meaning shall be
      construed accordingly.

9.11  Viatel shall have the right, but not be obliged, at any time or times
      without notice to Global Voice, to set off any liability of Global Voice
      under Clause 9 to Viatel against any liability of Viatel under Clause 7
      (in either case howsoever arising and whether any such liability is due
      and payable or will become payable at a later date, actual or contingent,
      liquidated or unliquidated and irrespective of the currency of its
      denomination) and may for such purpose convert or exchange any currency.
      Any exercise by Viatel of its rights under this clause shall be without
      prejudice to any rights or remedies available to Viatel or Global Voice
      under this Agreement or otherwise.

9.12  Save as provided in Clauses 7.1 and 9.11, all amounts due under this
      Agreement shall be paid in full without any deduction or withholding other
      than as required by law and neither party shall be entitled to assert any
      credit, set-off, deduction, counterclaim or abatement of any nature
      whatsoever against the other party in order to justify withholding payment
      of any such amount in whole or in part.

10    NEW EQUIPMENT COMPANY

10.1  As soon as practicable after Completion, Global Voice and Viatel shall
      form a company (the "EQUIPMENT COMPANY") for the sole purpose of acquiring
      new equipment to replace existing equipment used over the Viatel Network
      (the "NEW EQUIPMENT"), such New Equipment to be agreed between Global
      Voice and Viatel upon incorporation of the Equipment Company and/or in
      accordance with agreed applicable procedures set out in the Shareholders
      Agreement. For the avoidance of any doubt, if the parties shall fail so to
      agree, they shall each be free to procure New Equipment independently.

11    COMPLETION

11.1  Completion of this Agreement shall take place at the offices of Olswang,
      90 High Holborn, London WC1V 6XX on the later of two (2) Business Days
      following (a) this Agreement coming into full force and effect pursuant to
      the Escrow Agreement between the parties

                                       22
<PAGE>

      and their respective Solicitors dated the date hereof and (b) approval of
      this Agreement by the Shareholders of Viatel. At such Completion:

      11.1.1 The parties shall execute:

             -    the Network Operational Agreement;

             -    the Shareholders Agreement;

             -    such Licence Agreements and/or Site Leases which the parties
                  have identified do not require the consent of any other
                  person, and

      11.1.2 The payments referred to in Clause 9.1 shall be made.

11.2  Contemporaneous with Completion in London, there shall be completion
      meetings at the offices of Viatel's lawyers in Brussels, The Hague,
      Frankfurt and Paris at which, subject to proper conclusion of all local
      formalities and other legal requirements, the Network Leases, the Option
      and Transfer Agreements, the GND Asset Transfer and the GV Fibre Transfer
      Agreements in respect of Germany, the Netherlands and the UK will also be
      completed.

11.3  In the event that Completion shall not have taken place by either 31 July
      2006 or such later date as may be the subject of the last notice given by
      Viatel to Global Voice under paragraph 5 of the Escrow Agreement referred
      to in Clause 11.1, this Agreement shall lapse and be of no further force
      and effect, though without prejudice to any accrued rights or liabilities
      arising under this Agreement. Global Voice acknowledges that Viatel gives
      no assurance, undertaking or warranty that approval as referred to in
      Clause 11.1(b) will be obtained and Viatel shall have no liability in
      respect of such approval not being forthcoming.

11.4  Each party undertakes to the other that, pending Completion, it will not
      enter into any contractual or other arrangements or incur any liabilities
      in anticipation of Completion or whose purpose or realisation is dependent
      on Completion taking place. In the event this undertaking is breached by
      either party, subject always to the provisions of Clause 13, the party in
      breach shall have no claim against the other party for any costs, expenses
      or other losses arising as a direct or indirect consequence.

12    WARRANTIES

12.1  Subject as provided in the Viatel Disclosure Letter or the GV Disclosure
      Letter as appropriate, Viatel and Global Voice each respectively warrants
      and represents to the other in the terms and subject to the limitations
      set out in Schedule VI.

12.2  Except as expressly stated in this Agreement and the other Transaction
      Documents, all warranties and conditions by either party (including
      warranties and conditions as to fitness for purpose and description),
      whether express or implied by statute, common law or otherwise are hereby
      excluded to the extent permitted by law.

                                       23
<PAGE>

13    LIMITATION OF LIABILITY

13.1  Nothing in this Agreement shall limit liability for death or personal
      injury resulting from either party's negligence or for fraud.

13.2  Subject as provided in Parts II and IV of Schedule VI, the aggregate
      liability of either party and its Group Companies in respect of any loss
      or damage suffered by the other party and any of its Group Companies and
      arising out of or in connection with this Agreement and any of the other
      Transaction Documents, including Warranty Claims, and whether in contract,
      tort (including negligence) or for breach of statutory duty or in any
      other way, shall not exceed twenty million euros ((euro)20,000,000).

13.3  A party shall not be liable, in contract, tort (including negligence) or
      for breach of statutory duty or in any other way under or pursuant to this
      Agreement and the other Transaction Documents for:

      13.3.1 in the case of Viatel, any failure or inability to obtain any
             consent or agreement as referred to in Clause 2.6;

      13.3.2 in the case of Global Voice, any failure or inability to obtain any
             consent or agreement as referred to in Clause 4.9;

      13.3.3 any loss arising from or in connection with loss of revenues,
             profits, contracts or business or failure to realise anticipated
             savings; or

      13.3.4 any loss of goodwill or reputation; or

      13.3.5 any indirect or consequential losses

      suffered or incurred by the other party arising out of or in connection
      with any matter under this Agreement.

14    DURATION AND TERMINATION

      This Agreement shall come into force on the date of this Agreement and
      shall continue until the end of the Term.

15    ASSIGNMENT

15.1  Except as provided in this Clause 15, no party shall without the prior
      written consent (such consent not to be unreasonably withheld or delayed)
      of the other party assign or transfer at law, sub-license or deal in any
      other manner with this Agreement or any rights under this Agreement, or
      sub-contract any or all of its obligations under this Agreement or purport
      to do any of the same. Any purported assignment or other dealing in breach
      of this Clause shall confer no rights on the purported assignee.

                                       24
<PAGE>

15.2  Notwithstanding Clause 15.1, either party shall be entitled, upon giving
      notice to the other party, to assign its rights under this Agreement to
      any Group Company, provided that the assignor shall procure that the
      assignee shall assign those rights to a continuing Group Company
      immediately prior to ceasing to be a Group Company of the original
      assignor and shall give the other party prior written notice of this. Any
      such assignment shall not relieve the assignor of any of its obligations
      under this Agreement and shall be made on terms that the assignee
      acknowledges that the other party may continue to deal exclusively with
      the assignor in respect of all matters relating to this Agreement unless
      and until the assignee notifies the other party that it is exercising its
      rights as assignee.

15.3  For the avoidance of doubt, nothing in this Clause 15 shall restrict
      either party's or its Group Company's right to assign, transfer,
      sub-license, sub-lease or otherwise deal with any ducts, cables and/or
      fibres under a Network Lease, the GV Fibre Transfer Agreement and the GND
      Asset Transfer or restrict their rights to deal in the Viatel Transferred
      Assets, or Viatel's rights to deal in the GV Transferred Assets, in
      accordance with any provisions as to assignment (and other such dealings)
      in any such agreement PROVIDED THAT where such agreements refer as a
      condition of such right to the obligation on the assigning, transferring,
      licensing or leasing party in question to procure the counter-party's
      entry into a deed of covenant, such deed shall be in the form or
      substantially in the form (adapted to fit the facts and circumstances) set
      out in Schedule XIV. Any such assignment or other dealing shall not
      relieve the assignor in each case of any of its obligations under the
      relevant agreement and shall be made on terms that the assignee
      acknowledges that the other party to this Agreement may continue to deal
      exclusively with the assignor in respect of all matters relating thereto
      unless and until the assignee notifies the other party that it is
      exercising its rights as assignee.

15.4  For the avoidance of doubt, nothing in Clause 15.3 or in any deed of
      covenant entered into pursuant to Clause 15.3 shall cause any change or
      difference to the rights, obligations and arrangements between Viatel and
      Global Voice under the Network Operational Agreement. In particular,
      Global Voice shall remain responsible to Viatel under the Network
      Operational Agreement for the costs of and charges for any services
      provided by any Viatel Group Company for the benefit of any customer of
      any GV Group Company who has entered into a deed of covenant as referred
      to in Clause 15.3. Global Voice acknowledges that neither Viatel nor any
      other Viatel Group Company shall be under any obligation to provide any
      service under the Network Operational Agreement (or otherwise) direct to
      any such GV Group customer.

16    CONFIDENTIALITY

16.1  Each party undertakes that it will not at any time hereafter use, divulge
      or communicate to any person, except to its professional representatives
      or advisers or as may be required by law or any legal or regulatory
      authority, the terms and conditions of this Agreement or any confidential
      information concerning the business or affairs of the other party or of
      any member of the group of companies to which the other party belongs
      which may have or may in the future come to its knowledge and each of the
      parties shall use its reasonable

                                       25
<PAGE>

      endeavours to prevent the publication or disclosure of any confidential
      information concerning such matters. Any request or direction of any legal
      or regulatory authority to disclose any such confidential information
      shall, unless prevented by applicable law, be notified promptly before
      compliance to the other party who shall be given reasonable opportunity to
      resist. No party shall use any such confidential information except for
      the performance of this Agreement.

16.2  The provisions of Clause 16.1 shall not apply to information which:

      16.2.1 is or becomes generally available to the public otherwise than as a
             direct or indirect result of disclosure by the receiving party or a
             person employed or engaged by the receiving party contrary to their
             respective obligations of confidentiality; or

      16.2.2 is or was made available or becomes available to the receiving
             party otherwise than pursuant to this Agreement and free of any
             restrictions as to its use or disclosure.

16.3  No party shall make any announcement relating to this Agreement or its
      subject matter without the prior written approval of the other parties
      except as required by law or by any legal or regulatory authority.

17    NON-SOLICITATION

17.1  Global Voice hereby undertakes, for a period of three years commencing on
      the date of Completion, not to employ or engage the services of, nor
      solicit or attempt to entice away from Viatel, any senior person employed
      by Viatel during the two years prior to the date of this Agreement.

17.2  Viatel hereby undertakes, for a period of three years commencing on the
      date of Completion, not to employ or engage the services of, nor solicit
      or attempt to entice away from Global Voice, any senior person employed by
      Global Voice during the two years prior to the date of this Agreement.

18    FORCE MAJEURE

18.1  In this Agreement, "force majeure" shall mean any cause preventing either
      party from performing any or all of its obligations under any of the
      Transaction Documents which arises from or is attributable to change or
      imposition of any law or any governmental order, rule, regulation or
      direction, or nuclear or other accident of any kind, acts of God, war or
      terrorist activity, riot, civil commotion, malicious damage, fire, flood
      or storm.

18.2  If either party is prevented from performance of any of its obligations
      under any of the Transaction Documents by force majeure, that party (the
      "CLAIMING PARTY") shall as soon as reasonably possible and in any event
      within one (1) Business Day after commencement of the force majeure serve
      notice in writing on the other party specifying

                                       26
<PAGE>

      the nature and extent of the circumstances giving rise to force majeure,
      and shall subject to service of such notice have no liability in respect
      of any delay in performance or any non-performance of any such obligation
      save for any payment obligation which shall continue in full force and
      effect (and the time for performance shall be extended accordingly) to the
      extent that the delay or non-performance is due to force majeure.

19    NOTICES

19.1  Any notice given under this Agreement shall be in writing and shall be
      served by hand delivering it or sending it by prepaid recorded or special
      delivery post or prepaid international recorded airmail or fax to the
      address and for the attention of the relevant party set out in Clause 19.2
      (or as otherwise notified by that party hereunder). Any such notice shall
      be deemed to have been received:

      19.1.1 if hand delivered or sent by prepaid recorded or special delivery
             post or prepaid international recorded airmail, at the time of
             delivery;

      19.1.2 in the case of fax, at the time of transmission.

      Provided that if deemed receipt occurs before 9.00 a.m. on a Business Day
      the notice shall be deemed to have been received at 9.00 a.m. on that day,
      and if deemed receipt occurs after 5.00 p.m. on a Business Day, or on any
      day which is not a Business Day, the notice shall be deemed to have been
      received at 9.00 a.m. on the next Business Day. For the purpose of this
      Clause, "Business Day" means any day which is not a Saturday, a Sunday or
      a public holiday in the place at or to which the notice is left or sent
      and references to any time shall be to local time of the recipient.

19.2  The addresses and fax numbers of the parties for the purposes of Clause
      19.1 are:

      VIATEL HOLDING (BERMUDA) LIMITED

      Address:              c/o VTL (UK) Limited, Incubon House, Wick Road,
                            Egham, Surrey  TW20 0HR

      For the attention of: Group General Counsel

      Fax number:           +44 (0) 1784 494 281

      With a courtesy copy to Olswang, 90 High Holborn, London WC1V 6XX, for the
      attention of Colin Long

      VTL-TP (BERMUDA) LIMITED

      Address:              c/o VTL (UK) Limited, Incubon House, Wick Road,
                            Egham, Surrey  TW20 0HR

      For the attention of: Group General Counsel

                                       27
<PAGE>

      Fax number:           +44 (0) 1784 494 281

      With a courtesy copy to Olswang, 90 High Holborn, London WC1V 6XX, for the
      attention of Colin Long.

      GLOBAL VOICE GROUP LIMITED

      Address:              80 Raffles Place, 31-20 UOB Plaza 2,
                            Singapore 048624

      For the attention of: Christopher Nightingale

      Fax number:           +65 6538 4058

      With a courtesy copy to Olswang, 90 High Holborn, London WC1V 6XX, for the
      attention of Michael Brader.

      or such other address or fax number as may be notified in writing from
      time to time by the relevant party to the other parties.

19.3  In proving such service it shall be sufficient to prove that the envelope
      containing such notice was addressed to the address of the relevant party
      set out in Clause 19.2 (or as otherwise notified by that party hereunder)
      and delivered either to that address or into the custody of the postal
      authorities as a prepaid recorded or special delivery or international
      recorded airmail letter, or that the notice was transmitted by fax to the
      fax number of the relevant party set out in Clause 19.2 (or as otherwise
      notified by that party hereunder) and that the sender holds a transmission
      report indicating uninterrupted transmission to the relevant party and in
      the case of notice sent by fax to dispatch of the notice by prepaid post
      as provided above on the same day of such transmission (or the next day if
      notice is transmitted outside post office hours).

19.4  For the avoidance of doubt, the parties agree that the provisions of this
      Clause shall not apply in relation to the service of any process in any
      legal action or proceedings arising out of or in connection with this
      Agreement or the legal relationships established by this Agreement.

19.5  For the avoidance of doubt, notice given under this Agreement shall not be
      validly served if sent by email.

20    SEVERANCE

20.1  If any provision of this Agreement shall be found by any court or
      administrative body of competent jurisdiction to be invalid or
      unenforceable, such invalidity or unenforceability shall not affect the
      other provisions of this Agreement which shall remain in full force and
      effect.

                                       28
<PAGE>

20.2  If any provision of this Agreement is so found to be invalid or
      unenforceable but would be valid or enforceable if some part of the
      provision were deleted, the provision in question shall apply with such
      modification(s) as may be necessary to make it valid.

20.3  The parties agree, in the circumstances referred to in Clause 20.1 and if
      Clause 20.2 does not apply, to attempt in good faith to substitute for any
      invalid or unenforceable provision a valid or enforceable provision which
      achieves to the greatest extent possible the same effect as would have
      been achieved by the invalid or unenforceable provision. The obligations
      of the parties under any invalid or unenforceable provision of this
      Agreement shall be suspended whilst an attempt at such substitution is
      made.

21    GENERAL

21.1  Nothing in this Agreement is intended to or shall operate to create a
      partnership between the parties or any of them, or to authorise any party
      to act as agent for any other, and no party shall have authority to act in
      the name or on behalf of or otherwise to bind any other in any way or to
      hold itself out in its advertising or otherwise in any manner which would
      indicate or imply any such relationship with the other unless expressly
      provided otherwise in this Agreement.

21.2  No modification or variation of this Agreement (or any document entered
      into pursuant to or in connection with this Agreement) shall be valid
      unless it is in writing and signed by or on behalf of each of the parties
      to this Agreement. For the avoidance of doubt, no modification or
      variation of this Agreement shall be valid if made by email.

21.3  Unless expressly so agreed, no modification or variation of this Agreement
      shall constitute or be construed as a general waiver of any provisions of
      this Agreement, nor shall it affect any rights, obligations or liabilities
      under this Agreement which have already accrued up to the date of such
      modification or variation, and the rights and obligations of the parties
      under this Agreement shall remain in full force and effect, except and
      only to the extent that they are so modified or varied.

21.4  Except insofar as this Agreement expressly provides that a third party may
      in his own right enforce a term of this Agreement, a person who is not a
      party to this Agreement has no right under the Contracts (Rights of Third
      Parties) Act 1999 to rely upon or enforce any term of this Agreement but
      this does not affect any right or remedy of a third party which exists or
      is available apart from that Act.

21.5  Subject as provided in Clause 2.6, each party shall use all reasonable
      endeavours to execute or cause to be executed all such other documents and
      do or cause to be done all such further acts and things consistent with
      the terms of the Transaction Documents as the other party may from time to
      time reasonably require in order to vest in and secure for the other party
      the full benefit of the assets, rights and benefits to be transferred,
      granted or made available to the other party under the Transaction
      Documents and otherwise to give full effect to the terms of the
      Transaction Documents.

                                       29
<PAGE>

21.6  In no event will any delay, failure or omission (in whole or in part) in
      enforcing, exercising or pursuing any right, power, privilege, claim or
      remedy conferred by or arising under this Agreement or by law, be deemed
      to be or construed as a waiver of that or any other right, power,
      privilege, claim or remedy in respect of the circumstances in question, or
      operate so as to bar the enforcement of that, or any other right, power,
      privilege, claim or remedy, in any other instance at any time or times
      subsequently.

21.7  The rights and remedies provided by this Agreement are cumulative and
      (unless otherwise provided in this Agreement) do not exclude any other
      rights or remedies available in law.

21.8  This Agreement, the other Transaction Documents, the Escrow Agreement
      referred to in Clause 11.1 and the various letters written by the parties
      to each other dated the date hereof constitute the entire agreement and
      understanding of the parties relating to the subject matter of the
      Transaction Documents and supersede any previous agreement or
      understanding between the parties (or any of them) in relation to such
      subject matter.

21.9  Each of the parties acknowledges and agrees that in entering into the
      Transaction Documents, it has not relied on any statement, representation,
      warranty, understanding, undertaking, promise or assurance (whether
      negligently or innocently made) of any person (whether party to any
      Transaction Document or not) other than as expressly set out in the
      Transaction Documents. Each party irrevocably and unconditionally waives
      all claims, rights and remedies which but for this Clause it might
      otherwise have had in relation to any of the foregoing.

21.10 No party shall be liable in negligence or other tort for any act or
      omission which (individually or in combination with any other act or
      omission) constitutes a breach of this Agreement. Subject as provided in
      Clause 13, a party to this Agreement shall not be liable for any amount,
      in damages or other compensation, for a breach of this Agreement which has
      been compensated instead by a claim against a Group Company of that party
      for damages or other compensation under or pursuant to another Transaction
      Document or in respect of which proceedings upon such a claim have (at the
      relevant time) already been issued.

21.11 Nothing in the Transaction Documents shall limit or exclude any liability
      for fraud.

22    GOVERNING LAW AND JURISDICTION

22.1  The validity, construction and performance of this Agreement (and any
      claim, dispute or matter arising under or in connection with it or its
      enforceability) (a "DISPUTE") shall be governed by and construed in
      accordance with the laws of England. Any Dispute shall be referred to and
      finally resolved by arbitration pursuant to the Arbitration Agreement.

22.2  The parties shall enter into and execute the Arbitration Agreement within
      three (3) Business Days of the date hereof or, in the event the GV Group
      Companies in France

                                       30
<PAGE>

      and Belgium are incorporated subsequently, within five (5) Business Days
      of the last to occur of such incorporations.

22.3  The parties each irrevocably appoints the person specified in Clause 22.4
      as its agent to receive on its behalf in England service of any
      proceedings arising out of or in connection with the validity,
      construction or performance of this Agreement or its enforceability. Such
      service shall be deemed completed on delivery to such agent (whether or
      not it is forwarded to and received by the other party). If for any reason
      a party's agent ceases to be able to act as agent or no longer has an
      address in England, that party shall immediately appoint a substitute
      acceptable to the other party and deliver to that other party the new
      agent's name, address and fax number.

22.4  The persons and their addresses and fax numbers appointed in Clause 22.3
      are:

      VIATEL HOLDING (BERMUDA) LIMITED

      Address:                    Olswang, 90 High Holborn, London WC1V 6XX

      For the attention of:       Colin Long

      Fax number:                 +44 (0) 20 7067 3999

      GLOBAL VOICE GROUP LIMITED

      Address:                    Memery Crystal solicitors, 44 Southampton
                                  Buildings, London WC2A 1AP

      For the attention of:       Peter Crystal

      Fax number:                 +44 (0) 20 7242 2058

                                       31

<PAGE>

                                   SCHEDULE I

                               CUSTOMER CONTRACTS

VIATEL - LIST OF EXISTING WHOLESALE CUSTOMERS - RECURRING REVENUES

<Table>
<Caption>
                                                                                                   MARCH
                                                                                                  MONTHLY  MONTHLY
                                                                                                  Revenue    COS
COUNTRY  COMPANY      CUSTOMER              SERVICE      CONTRACT LENGTH   DETAIL                   GBP      GBP
-------  -----------  ----------------  ---------------  ----------------  ---------------------  -------  -------
<S>      <C>          <C>               <C>              <C>               <C>                    <C>      <C>
Holland  Viatel GCBV  Infonet           STM4             20 years          Amsterdam-Dusseldorf    1703.9      762
Holland  Viatel GCBV  Infonet           STM1             20 years          Amsterdam-Dusseldorf     909.7        0
Holland  Viatel GCBV  Infonet           STM4             20 years          Amsterdam-London        1703.9      762

UK       VCA Limited  Verizon           STM1 rental      Monthly rollover  Paris RDJ-St Denis      2527.0        0
UK       VCA Limited  Tyco              Dark fibre       Quarterly         AOM Germany            23882.4        0

Germany  VTL Telecom  AT&T              leased line      Monthly rollover  Frankfurt to Manheim    2290.0   1156.5
Germany  VTL Telecom  AT&T              Colocation       10 years          Sublease at Manheim     4681.0        0
Germany  VTL Telecom  Sellect One       Circuits         Monthly rollover  London- frankfurt        136.1        0
Germany  VTL Telecom  Sellect One       Circuits         Monthly rollover  Paris to Frankfurt        68.0        0
Germany  VTL Telecom  Sellect One       Circuits         Monthly rollover  Paris to Frankfurt        68.0        0

Bermuda  VTL-TP       Anycall           Circuits         Monthly rollover  London- Amsterdam        666.7        0
Bermuda  VTL-TP       Fibrenet          Circuits         Monthly rollover  Paris - New York         866.4        0
Bermuda  VTL-TP       Fibrenet          Circuits         Monthly rollover  london-newyork          1299.6    879.7
Bermuda  VTL-TP       Stellar           STM1             Monthly rollover  Amsterdam to new york   2381.1        0
Bermuda  VTL-TP       Thus              STM4             Monthly rollover  Londom-Amsterdam        2721.3
</TABLE>

                                       32

<PAGE>

<TABLE>
<S>      <C>          <C>               <C>              <C>               <C>                    <C>      <C>
Bermuda  VTL-TP       Infonet           KPN Tail         10 years          Frankfurt-Amsterdam     2496.4     1500
Bermuda  VTL-TP       Infonet           Dark fibre       Monthly rollover  dusseldorf-dusseldorf    693.1
Bermuda  VTL-TP       Infonet           STM4             Monthly rollover  Amsterdam to London     9626.7     4564
Bermuda  VTL-TP       Tyco France       AOM              20 years          France                 19418.4        0
Bermuda  VTL-TP       Tyco Netherlands  AOM              20 years          Holland                 6031.7        0
Bermuda  VTL-TP       Tyco Belgium      AOM              20 years          Belgium                 2766.1        0
Bermuda  VTL-TP       Tyco UK           AOM              20 years          Uk                      3893.4        0
Bermuda  VTL-TP       Globix            AOM              5 years           TBC                      481.3        0

UK       VTL UK       AT&T              Colo/Dark Fibre  Monthly Rollover  London-Frankfurt        4500.0   1578.3
UK       VTL UK       GTS Czech         Circuit          Monthly Rollover  London-Frankfurt         122.5        0

France   Viatel Ops   Infonet           Dark fibre pair  Monthly rollover                          170.08        0
France   Viatel Ops   Infonet           Dark fibre pair  5 years                                  1360.64        0
France   Viatel Ops   Infonet           Colocation       5 years                                  2079.00        0

                                                                           L/month                99544.5  11202.5

                                                                           MILLION EURO PER YEAR      1.7      0.2
</Table>

                                       33

<PAGE>

                                  SCHEDULE IIA

                              GERMAN NETWORK ASSETS

ROUTE

GERMANY SCHEMATIC - VIATEL 092786

GND

GASLINE

Elten - F1

F1 - M1

M2 to Pont de L'Europe

Frankfurt (Kleyerstrasse 90) to F1

F1 to Frankfurt (Kleyerstrasse 90)

M1 - Mannheim

Mannheim - M2

Frankfurt Build. Kleyertrasse 90 to InterXion (19 Weismeullerstrasse)

Frankfurt Build. InterXion to F4.  nth side of Kaiserleibrucke.

Frankfurt Build. Kaiserleibrucke crossing

Frankfurt Build WSA Route

                                       34

<PAGE>

                                  SCHEDULE IIB

                            GERMAN TRANSFERRED ASSETS

PART A: NETWORK SEGMENTS

<TABLE>
<CAPTION>
SEGMENT                   TITLE*   ASSET TYPE   GRANT PERIOD
------------------------  -------  -----------  -------------------------------
<S>                       <C>      <C>          <C>
PEN 2                     Duct     Fibre        March 31/June 30, 2017 with
                          leased,               option for extension to 2029
                          fibre
                          owned

Frankfurt Northern
Build (Frankfurt Ring)    Owned    Duct, Fibre  unlimited**

Frankfurt Southern Build  Duct     Fibre        31 December 2010, duct lease
(Frankfurt Ring)          leased,               then renews annually unless
                          fibre                 terminated by either party,
                          owned                 landlord has early termination
                                                rights.

Mannheim Build            Owned    Duct, Fibre  unlimited**
</Table>

* Subject to Clause 6 of the German Asset Lease.

**Subject to last paragraph of Clause 2.1 in the German Asset Lease.

                                       35

<PAGE>

PART B: DUCT AND FIBRE ALLOCATIONS

DUCT ALLOCATIONS

<TABLE>
<CAPTION>
                            TOTAL NUMBER OF
                           DUCTS / SUBDUCTS
                          (NUMBER OF DUCTS /     OPTION (CLAUSE 6.1                           DUCT / SUBDUCT  ALLOCATION RATIO
                            SUBDUCTS TO BE       AND/OR 6.2 OF THE                            LEASED / OWNED   FOR GV IN % OF
NETWORK SECTION            ALLOCATED TO GV)       MASTER AGREEMENT         COMMENTS             BY VIATEL       OWNED ASSETS
------------------------  ------------------  ---------------------   ----------------------  --------------  ----------------
<S>                       <C>                 <C>                     <C>                     <C>             <C>
PEN 2                            NONE         -                       DUCT LEASED FROM         LEASED         NONE
                                                                      GASLINE

FRANKFURT SOUTHERN BUILD         NONE         -                       DUCT LEASE FROM WSA,     LEASED         NONE
                                                                      FROM SPLICING
                                                                      CHAMBER F2(1) TO F3(2)
FRANKFURT NORTHERN BUILD

Chamber F13 to            2 Primary ducts, 4  Clause 6.1 and Clause   IRU over 1 subduct       Owned          Primary Ducts:
Frankfurt POP4             Subducts (one of   6.2                     granted to                              50 %
                            which leased to                           Fibrenet.  three                        Subducts: 50 %
                               Fibernet)                              subducts available.
                            (1 Primary Duct
                            and 2 Subducts)
</TABLE>

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

(1) Chamber F2 located at Schwanheimerufer, where A5 crosses Schwanheimerufer.

(2) Chamber F3 located on the footpath along south bank of Main river where the
Kaiserleibrucke crosses the footpath.

(3) Chamber F1 located on Kleyerstrasse to the west of the Viatel POP at a point
where the A5 crosses Kleyerstrasse.

(4) Frankfurt POP located at Kleyerstra(beta)e 90, Frankfurt

                                       36
<PAGE>
<TABLE>
<CAPTION>
                              TOTAL NUMBER OF
                             DUCTS / SUBDUCTS
                            (NUMBER OF DUCTS /     OPTION (CLAUSE 6.1                         DUCT / SUBDUCT  ALLOCATION RATIO
                              SUBDUCTS TO BE       AND/OR 6.2 OF THE                          LEASED / OWNED   FOR GV IN % OF
NETWORK SECTION              ALLOCATED TO GV)       MASTER AGREEMENT         COMMENTS           BY VIATEL       OWNED ASSETS
--------------------------  ------------------  ---------------------   --------------------  --------------  ----------------
<S>                         <C>                 <C>                     <C>                   <C>             <C>
Frankfurt POP to            2 Primary ducts, 4  Clause 6.2              Three sub-ducts        Owned          Primary Ducts:
Interxion(5)                 Subducts (one of                           currently occupied.                   50 %
                              which leased to                           Only one of the four                  Subducts: 25 %
                                 Fibernet)                              sub-ducts is
                              (1 Primary Duct                           available for
                              and 1 Subduct)                            allocation.

Interxion to Chamber F4(6)    2 primary ducts, 4  Clause 6.1              Duct is not cabled     Owned          Primary Ducts:
                                 subducts                                                                     50 %
                            (1 primary duct, 2                                                                Subducts: 50 %
                                 subducts)

Chamber F3 - Chamber F4      1 primary duct/ 4  -                       One sub-duct is        Owned          Subducts: 25 %
(Kaiserleibrucke                 subducts                               occupied by a third
crossing)                       (1 subduct)                             party, the other
                                                                        carries the Viatel
                                                                        cable.
</TABLE>

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

(5) Interxion POP located at Weismullerstrasse 19.

(6) Chamber F4 located at north side of Riederhofstrasse approximately 25 meters
west of the point where the A661 crosses Riederhofstrasse.

                                       37
<PAGE>

<TABLE>
<CAPTION>
                             TOTAL NUMBER OF
                            DUCTS / SUBDUCTS
                           (NUMBER OF DUCTS /     OPTION (CLAUSE 6.1                         DUCT / SUBDUCT  ALLOCATION RATIO
                             SUBDUCTS TO BE       AND/OR 6.2 OF THE                          LEASED / OWNED   FOR GV IN % OF
NETWORK SECTION             ALLOCATED TO GV)       MASTER AGREEMENT         COMMENTS           BY VIATEL       OWNED ASSETS
-------------------------  ------------------  ---------------------   --------------------  --------------  ----------------
<S>                        <C>                 <C>                     <C>                   <C>             <C>
MANNHEIM BUILD

Chamber M1(7) to Mannheim    2 Primary Ducts   -                       The second primary     Owned          Primary Ducts:
POP(8)                       (1 Primary Duct                           duct allocated to GV                  50 %
                                                                       also carries the GND
                                                                       PEN 3 cable.

Mannheim POP to Chamber      2 Primary Ducts   -                       The second primary     Owned          Primary Ducts:
M2(9)                        (1 Primary Duct                           duct allocated to GV                  50 %
                                                                       also carries the GND
                                                                       PEN 3 cable.
</Table>

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

(7) Location not entirely clear, to be confirmed by site survey. Location
believed to be south side of the B37 at a point immediately west of the
intersection of the B37 and Barlochweg.

(8) Mannheim POP located at Hans-Thoma-Strasse 15-17, Neuostheim, D-68163
Mannheim.

(9) Location not entirely clear, to be confirmed by site survey. Location
believed to be on the north side of the A656 at a point east of the intersection
of the A656 and Lubenweg.

                                       38
<PAGE>

FIBRE ALLOCATIONS

<TABLE>
<CAPTION>
                           TOTAL NUMBER OF
                                FIBRES
                              (NUMBER OF       SPECIFIC FIBRES                         FIBRE OWNED  ALLOCATION RATIO
                             FIBRES TO BE      TO BE ALLOCATED                         / LEASED BY    FOR GV IN % OF
NETWORK SECTION            ALLOCATED TO GV)   TO GV (TUBE NUMBER)       COMMENTS         VIATEL       OWNED ASSETS
-----------------------   ------------------  -------------------  ------------------  -----------  ----------------
<S>                       <C>                 <C>                  <C>                 <C>             <C>
PEN 2                                                              GasLINE duct lease

Elten - Kapellen                72(36)        Fibres 37-72(Tubes                          Owned         Cable: 50 %
                                              4-6)

Kapellen - Dusseldorf           72(36)        Fibres 37-72(Tubes                          Owned         Cable: 50 %
                                              4-6)

Dusseldorf - Portz              72(36)        Fibres 37-72(Tubes                          Owned         Cable: 50 %
                                              4-6)

Portz - Linz                    72(36)        Fibres 37-72(Tubes                          Owned         Cable: 50 %
                                              4-6)

Linz - Dernbach                 72(36)        Fibres 37-72(Tubes                          Owned         Cable: 50 %
                                              4-6)

Dernbach - Naurod               72(36)        Fibres 37-72(Tubes                          Owned         Cable: 50 %
                                              4-6)

Naurod - Chamber F1             72(36)        Fibres 37-72(Tubes                          Owned         Cable: 50 %
                                              4-6)

Frankfurt POP - Chamber         72(36)        Fibres 25-36,                               Owned         Cable: 50 %
F1                                            49-72 (Tubes 3, 5,
                                              6)

Chamber F1 - Chamber            72(36)        Fibres 25-36,                               Owned         Cable: 50 %
M1(10)                                        49-72 (Tubes 3, 5,
                                              6)
</TABLE>

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

(10) Location not entirely clear, to be confirmed by site survey. Location
believed to be south side of the B37 at a point immediately west of the
intersection of the B37 and Barlochweg.

                                       39
<PAGE>

<TABLE>
<CAPTION>
                           TOTAL NUMBER OF
                                FIBRES
                              (NUMBER OF       SPECIFIC FIBRES                         FIBRE OWNED  ALLOCATION RATIO
                             FIBRES TO BE      TO BE ALLOCATED                         / LEASED BY    FOR GV IN % OF
NETWORK SECTION            ALLOCATED TO GV)   TO GV (TUBE NUMBER)       COMMENTS         VIATEL       OWNED ASSETS
-----------------------   ------------------  -------------------  ------------------  -----------  ----------------
<S>                       <C>                 <C>                  <C>                 <C>          <C>
Chamber M1 - Chamber M2                                            See Mannheim Build
                                                                          below

Chamber M2 - Berg               72(36)        Fibres 37-72(Tubes                           Owned       Cable: 50 %
                                              4-6)

Berg - Pont de l'Europe         72(36)        Fibres 37-72(Tubes                           Owned       Cable: 50 %
                                              4-6)

FRANKFURT NORTHERN BUILD                                                                   Owned

Chamber F1 - Frankfurt          72(36)        Fibres 37-72(Tubes                           Owned       Cable: 50 %
POP                                           4-6)

Frankfurt POP -                 72(36)        Fibres 49-60 (Tube   72f cable but only      Owned       Cable: 50 %
Interxion                                     5) - Terminated      24 spliced through
                                              Fibres 25-36,
                                              61-72 (Tubes 3, 6)

Interxion -                    no cable       no cable                                     Owned           n/a
Chamber F4 (i.e.
Kaiserleibrucke)

Chamber F3 to Chamber F4        72(36)        Fibres 37-72                                 Owned       Cable: 50 %
                                              (Tubes 4, 5 & 6)

FRANKFURT SOUTHERN BUILD                                            WSA duct lease
</TABLE>

                                       40
<PAGE>

<TABLE>
<CAPTION>
                             TOTAL NUMBER OF
                                  FIBRES
                                (NUMBER OF       SPECIFIC FIBRES                                   FIBRE OWNED  ALLOCATION RATIO
                               FIBRES TO BE      TO BE ALLOCATED                                   / LEASED BY    FOR GV IN % OF
NETWORK SECTION              ALLOCATED TO GV)   TO GV (TUBE NUMBER)       COMMENTS                    VIATEL       OWNED ASSETS
--------------------------  ------------------  -------------------  ----------------------------  -----------  ----------------
<S>                         <C>                 <C>                  <C>                           <C>          <C>
Chamber F2 - Chamber F3           72(36)         Fibres 13-24 (Tube  Except 150 meters temporary      Owned       Cable: 50 %
                                                 2), Fibres 49-72          section (below)
                                                 (Tubes 5, 6)

Temporary Section,                24(12)         Fibres 13-24 (Tube      To be replaced 2007,         Owned       Cable: 50 %
Offenbach - Schleuse                             2)                  allocation to GV then to be
Offenbach, between                                                      increased to 36 fibres
07.PII.032.FN and
07.PII.033.FN

MANNHEIM BUILD

Chamber M1 - Mannheim             72(36)         Fibres 25-36,        See Duct Allocation table       Owned       Cable: 50 %
POP(11) (VTL Primary Duct)                       49-72 (Tubes 3, 5,             above.
                                                 6)

Chamber M1 - Mannheim             72(72)         n/a                  See Duct Allocation table       Owned       Cable: 100 %
POP(12) (Second Primary                                               above. The second primary
Duct allocated to GV)                                                 duct allocated to GV also
                                                                           carries a cable
</TABLE>

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

(11) Mannheim POP located at located at Hans-Thoma-Strasse 15-17, Neuostheim,
D-68163 Mannheim.

(12) Mannheim POP located at located at Hans-Thoma-Strasse 15-17, Neuostheim,
D-68163 Mannheim.

                                       41
<PAGE>

<TABLE>
<CAPTION>
                           TOTAL NUMBER OF
                                FIBRES
                              (NUMBER OF       SPECIFIC FIBRES                                   FIBRE OWNED  ALLOCATION RATIO
                             FIBRES TO BE      TO BE ALLOCATED                                   / LEASED BY    FOR GV IN % OF
NETWORK SECTION            ALLOCATED TO GV)   TO GV (TUBE NUMBER)       COMMENTS                    VIATEL       OWNED ASSETS
-----------------------   ------------------  -------------------  ----------------------------  -----------  ----------------
<S>                       <C>                 <C>                  <C>                           <C>          <C>
Mannheim POP - Chamber          72(36)         Fibres 37-72(Tubes   See Duct Allocation table       Owned       Cable: 50 %
M2(13) (VTL Primary Duct)                      4-6)                           above.

Mannheim POP - Chamber          72(72)         n/a                  See Duct Allocation table       Owned       Cable: 100 %
M2(14) (Second Primary                                              above. The second primary
Duct allocated to GV)                                               duct allocated to GV also
                                                                         carries a cable
</Table>

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

(13) Location not entirely clear, to be confirmed by site survey. Location
believed to be on the north side of the A656 at a point east of the intersection
of the A656 and Lubenweg.

(14) Location not entirely clear, to be confirmed by site survey. Location
believed to be on the north side of the A656 at a point east of the intersection
of the A656 and Lubenweg.

                                       42
<PAGE>

                                  SCHEDULE IIIA

                              FRENCH NETWORK ASSETS

ROUTE

FRANCE SCHEMATIC - VIATEL 092782:

Leers Nord to Corbehem

Corbehem- Biaches

Biaches-Cayeux-Sur-Mer

Biaches - Janville (via Thourotte)

Janville- La Defense (via L'Isle Adam)

La Defense -  35 RDJ

35 RDJ - Courcelles (via Meaux & Azy)

Courcelles- Longeaux (via Conde sur Marne & Revigny)

Longeaux-Reichstett (via Troussey, Nancy & Xouxange)

Reichstett - Pont de L'Europe

Pont de 'Europe to Strasbourg

Strasbourg to Pont de L'Europe (direction Berg, Germany)

PARIS SCHEMATIC - VIATEL 092757:

35 RDJ - 38 RDJ

38 RDJ - 35 RDJ

Porte de Villiers to Rue Francique poulbot

Rue Francique poulbot to Rue Ambrouze Croizat (west s/o St. Denis)

Chamber (east side of St. Denis) to Porte d 'Aubervilliers

Porte d 'Aubervilliers to 35 RDJ

InterXion - splice (victor Hugo) lateral 1

                                       43
<PAGE>

ROUTE

InterXion - splice (victor Hugo) lateral 2

35 RDJ to SC Place Lachambaudie

Quai Penhard to SEMAPA tunnel-Tolbiac (within 35 RDJ to SC Place Lachambaudie
section)

Rue Kessel to Rue de Baron Leroy (within 35 RDJ to SC Place Lachambaudie
section)

                                       44
<PAGE>

                                  SCHEDULE IIIB

                            FRENCH TRANSFERRED ASSETS

PART 1 -- DUCTS

<TABLE>
<CAPTION>
                             TOTAL NUMBER OF DUCTS / SUBDUCTS          OPTION
                               (NUMBER OF DUCTS / SUBDUCTS     (CLAUSE 6.1 AND/OR 6.2
NETWORK SECTION                   TO BE ALLOCATED TO GV)        OF MASTER AGREEMENT)          COMMENTS
--------------------------   --------------------------------  -----------------------  -------------------
<S>                          <C>                               <C>                      <C>
FRANCE

Corbehem-Biaches             2 Ducts (1 Duct)                  Clause 6.1.

Biaches-Cayeux-Sur-Mer       4 Ducts (2 Ducts)                 Clause 6.1 re both of
                                                               the GV allocated ducts.

Biaches - Janville (via      2 Ducts (1 Duct)                  Clause 6.1.
Thourotte)

Courcelles- Longeaux (via    2 Ducts (1 Duct)                  Clause 6.1.
Conde sur Marne & Revigny)

Longeaux-Reichstett (via     2 Ducts (1 duct)                  Clause 6.1.
Troussey, Nancy & Xouxange)

Pont de L'Europe to          2 Ducts (1 Duct)                  Clause 6.1 of the
Strasbourg                                                     Master Agreement.

PARIS                                   -                      -                        No continuous spare
                                                                                        Ducts, see below
                                                                                        fibre allocations.
</Table>

                                       45
<PAGE>

   PART 2 -- FIBRES

<TABLE>
<CAPTION>
                                  TOTAL NUMBER OF FIBRES             SPECIFIC FIBRES
                                    (NUMBER OF FIBRES                TO BE ALLOCATED
NETWORK SECTION                   TO BE ALLOCATED TO GV)           TO GV (TUBE NUMBER)                COMMENTS
--------------------------   --------------------------------  ---------------------------   ------------------------
<S>                          <C>                               <C>                           <C>
Corbehem - Biaches                        72 (36)              F 37-48 (4), F 49-60 (5), F
                                                               61-72 (6).
Biaches - Amiens                          72 (36)              F 25-36 (3), F 37-48 (4), F
                                                               61-72 (6).
Amiens -- Cayeux                          72 (36)              F 25-36 (3), F 37-48 (4), F
                                                               61-72 (6).
Biache - Thourette                        72 (36)              F 25-36 (3), F 37-48 (4), F
                                                               61-72 (6).

Thourette - L'Isle Adam                   72 (36)              F 37-48 (4), F 49-60 (5), F
                                                               61-72 (6).

L'Isle Adam - Paris La
Defense                                   72 (36)              F 37-48 (4), F 49-60 (5), F
                                                               61-72 (6).

Paris 35 RDJ -- Paris La
Defense                                   72 (36)              F 13-24 (2), F 25-36 (3), F   Only F 13-24 (2) are
                                                               37-48 (4)                     spliced through between
                                         192 (96)              F 97-192 (9-16)               35 RDJ and La defense.
                                                                                             F 25-36 & F 37-48 can be
                                                                                             spliced through at Porte
                                                                                             de Villiers.

Meaux -- Paris 35 RDJ                     72 (36)              F 37-48 (4), F 49-60 (5), F
                                                               61-72 (6).

Azy -- Meaux                              72 (36)              F 25-36 (3), F 37-48 (4), F
                                                               49-60 (5).
Conde sur Marne -- Azy                    72 (36)              F 25-36 (3), F 37-48 (4), F
                                                               49-60 (5).

Revigny -- Conde sur Marne                72 (36)              F 25-36 (3), F 37-48 (4), F
                                                               49-60 (5).
</TABLE>

                                       46
<PAGE>

<TABLE>
<CAPTION>
                                  TOTAL NUMBER OF FIBRES             SPECIFIC FIBRES
                                    (NUMBER OF FIBRES                TO BE ALLOCATED
NETWORK SECTION                   TO BE ALLOCATED TO GV)           TO GV (TUBE NUMBER)                COMMENTS
--------------------------   --------------------------------  ---------------------------   ------------------------
<S>                          <C>                               <C>                           <C>
Troussey -- Revigny                       72 (36)              F 25-36 (3), F 37-48 (4), F
                                                               49-60 (5).

Nancy -- Troussey                         72 (36)              F 25-36 (3), F 37-48 (4), F
                                                               49-60 (5).

Xouaxange -- Nancy                        72 (36)              F 25-36 (3), F 37-48 (4), F
                                                               49-60 (5).

Xouaxange - Strasbourg                    72 (36)              F 37-48 (4), F 49-60 (5), F   Includes a section of
                                                               61-72 (6).                    Duct IRU from Neuf
                                                                                             Telecom.

Strasbourg -- Pont de l'                   72(36)              F 37-48 (4), F 49-60 (5), F   Direction Berg, Germany
Europe                                                         61-72 (6)

PARIS

Paris 35 RDJ -- Paris 38
RDJ                                       48 (24)              F 25-36 (3), F 37-48 (4).

Paris 38 RDJ -- Paris 35
RDJ                                      192 (96)              F 97-192 (tubes 13-24)

Porte de Villiers - Rue
Ambroise Croizat (west                   144 (72)              F 25-36 (3), 37-48 (4),       F 25-36 (3), 37-48 (4)
s/o St. Denis)                                                 49-60 (5).                    are spliced through to
                                                                                             35 RDJ.

                                                               F 109-120 (10), F 121-132
                                                               (11), F 133-144 (12).

Chamber (East side of St.               216 (108)              F 25-36 (3), F37-48 (4), F
Denis) - 35 RDJ (via                                           133-216 (12, 13, 14, 15, 16,
Porte de Aubervilliers                                         17 & 18)

InterXion - Splice (Victor                72 (36)              F 37-72 (4, 5 & 6)            Not spliced to backbone.
Hugo) Lateral                                                                                Duct under lease from
                                                                                             Interxion.
</TABLE>

                                       47
<PAGE>

<TABLE>
<CAPTION>
                                       TOTAL NUMBER OF FIBRES             SPECIFIC FIBRES
                                         (NUMBER OF FIBRES                TO BE ALLOCATED
NETWORK SECTION                        TO BE ALLOCATED TO GV)           TO GV (TUBE NUMBER)                COMMENTS
--------------------------------  --------------------------------  ---------------------------   ------------------------
<S>                               <C>                               <C>                           <C>
InterXion - Splice (Victor Hugo)              72 (36)               F 37-72 (4, 5 & 6)            Not spliced to backbone.
Lateral
                                                                                                  Duct under lease from Interxion.

35 RDJ to SC Place Lachambaudie               72 (36)               F 37-72 (4, 5 & 6)            Includes 2 Duct Leases from Colt
                                                                                                  Telecom.
                                              192 (96)              F 97-192 (13-24)
</Table>

                                       48
<PAGE>

                                  SCHEDULE IVA

                               NBUK NETWORK ASSETS

NETHERLANDS

            ROUTE

            NETHERLANDS SCHEMATIC - VIATEL 092785

            Zandvoort- Delfandlaan

            Delfandlaan to SC-DUS-AMS-SP-012

            SC-DUS-AMS-SP-012 to Leersum

            Leersum to SC-DUS-AMS-SP-13

            Elten to SC-DUS-AMS-SP-13

            Doorn to SC-DUS-AMS-SP-13

            SC-DUS-AMS-SP-012 - Doorn

            World Trade Centre- Delfandlaan

            Delfandlaan - World Trade Centre

            Delfandlaan-Rotterdam

            Rotterdam-Kalwijk

            Rotterdam - Rosendaal

            Rosendaal-Essen

            Rosendaal - Netherlands / Belgium Border

                                       49
<PAGE>

BELGIUM

            ROUTE

            BELGIUM SCHEMATIC - VIATEL 092785

            Netherlands / Belgium Border - Estampuis (via Antwerp & Gent)

            Estampuis - Leers Nord

            Backbone to Brussels Tollaan

            Brussels Tollaan to Backbone

                                       50
<PAGE>

UK

                                      ROUTE

            UK SCHEMATIC - VIATEL 092783

            Lowestoft beach chamber - Zandvoort

            Lowestoft beach chamber - Lowestoft

            Lowestoft - Telehouse North

            Telehouse North- Egham

            Egham-Windlesham

            Windlesham - Polegate

            Polegate-Polegate beach chamber

            Polegate beach chamber-Cayeux-sur-Mer

            DOCKLANDS SCHEMATIC - VIATEL 092743

            Telehouse North - Butchers Road (North route)

            Butchers Road-Telehouse North (South route)

            Lower Lea Bridge (included in Butchers Road - Telehouse North (South
            route)

            Telehouse North-Jcn.DitchburnSt/Blackwall (via Telehouse East)

            Marsh Wall- Limeharbour

            6-7 Habour Exchange connection (Single Route)

            8-9 Habour Exchange connection (lateral 1)

            8-9 Habour Exchange connection (lateral 2)

            Telecity Bonnington connection (lateral 1)

            Telecity Bonnington connection (lateral 2)

                                       51
<PAGE>

                                     ROUTE

            London Hosting Centre (lateral 1)

            London Hosting Centre (lateral 2)

            Global Switch (Single Route)

            Jcn.Millwal lInnDock/Marsh Wall to SC.Westferry Road

            SC.Westferry Road to SC:O/S 47 Millharbour

            SC:O/S 47 Millharbour to Marsh Wall

            DitchburnSt/Blackwell - SC: A13 South

            DitchburnSt/Blackwell - Lindfieldtreet

            SC27-Lindfield Street (CONTAINED WITHIN TELEHOUSE NORTH - EGHAM
            ABOVE)

            Lindfield Street - A13 South (CONTAINED WITHIN TELEHOUSE NORTH -
            EGHAM ABOVE)

            Telehouse North- SC: A 13 (CONTAINED WITHIN TELEHOUSE NORTH - EGHAM
            ABOVE)

            Great Eastern Street PC - SC27 (CONTAINED WITHIN TELEHOUSE NORTH -
            EGHAM ABOVE)

            Egham - Great Eastern Street PC (CONTAINED WITHIN TELEHOUSE NORTH -
            EGHAM ABOVE)

            PC (Great Eastern Street)-Braham Street

                                       52
<PAGE>

                                  SCHEDULE IVA

                             NBUK TRANSFERRED ASSETS

NETHERLANDS

PART 1 - DUCTS AND SUBDUCTS

<TABLE>
<CAPTION>
                                                                                                               DUCT
                                   TOTAL NUMBER OF               OPTION                                       LEASED /
                             DUCTS / SUBDUCTS (NUMBER OF     (CLAUSE 6.1 OR                                     OWNED
NETWORK                         DUCTS / SUBDUCTS TO BE        6.2 OF MASTER                                      BY
SECTION                            ALLOCATED TO GV)            AGREEMENT)               COMMENTS               VIATEL
------------------------     ---------------------------     ---------------     ------------------------     ----------
<S>                          <C>                             <C>                 <C>                          <C>
Zandvoort - Deflandlaan           4 ducts (2 ducts)          Clause 6.1                                         Owned
(Amst)

Deflandlaan (Amsterdam)           4 ducts (2 ducts)          Clause 6.1                                         Owned
- SC-12

SC-12 - Leersum                      4 ducts (2)             Clause 6.1                                         Owned

Leersum - SC-13                   4 ducts (2 ducts)          Clause 6.1                                         Owned

Elten - SC-13                     4 ducts (2 ducts)          Clause 6.1                                         Owned

Doorn - SC-13                        4 ducts (2)             Clause 6.1                                         Owned

SC-12 - Doorn                     4 ducts (2 ducts)          Clause 6.1                                         Owned

World Trade Centre -              4 ducts (2 ducts)          Clause 6.1                                         Owned
Deflandlaan (Amsterdam)

Deflandlaan (Amsterdam)            4 ducts (2 duct)          Clause 6.1                                         Owned
- World Trade Centre -

Deflandlaan (Amsterdam)           2 ducts (1 ducts)          Clause 6.1          Originallly 4 ducts, 2         Owned
- Rotterdam                                                                      ducts sold, 2 available.

Rotterdam - Roosendaal            5 ducts (2 ducts)          Clause 6.1          5 ducts of which one           Owned
                                                                                 extra duct obtained form
                                                                                 Versatel.
</TABLE>

                                       53
<PAGE>

<TABLE>
<CAPTION>
                                                                                                               DUCT
                                   TOTAL NUMBER OF               OPTION                                       LEASED /
                             DUCTS / SUBDUCTS (NUMBER OF     (CLAUSE 6.1 OR                                     OWNED
NETWORK                         DUCTS / SUBDUCTS TO BE        6.2 OF MASTER                                      BY
SECTION                            ALLOCATED TO GV)            AGREEMENT)               COMMENTS               VIATEL
------------------------     ---------------------------     ---------------     ------------------------     ----------
<S>                          <C>                             <C>                 <C>                          <C>
Rotterdam - Katwijk               6 ducts (3 ducts)          Clause 6.1          No chambers on this duct       Owned
                                                                                 section, not cabled

Roosendaal - Essen                4 ducts (2 ducts)          Clause 6.1                                         Owned
                                                             regarding both
                                                             GV Ducts

Roosendaal -                   2 sub ducts (1 sub duct)      Clause 6.1                                         Owned
Netherlands border
</TABLE>

                                       54
<PAGE>

PART 2 - FIBRES

<TABLE>
<CAPTION>
                                               TOTAL
                                             NUMBER OF          SPECIFIC
                                              FIBRES            FIBRES TO
                                              (NUMBER              BE                               FIBRE
                                             OF FIBRES          ALLOCATED                           LEASED
                             PEN -             TO BE              TO GV                           / OWNED
NETWORK                      BUILD           ALLOCATED            (TUBE                               BY
SECTION                      SPEC             TO GV)             NUMBER)           COMMENTS         VIATEL
-------------------    -----------------    -----------    -------------------    ----------    -------------
<S>                    <C>                  <C>            <C>                    <C>           <C>
Zandvoort -            Netherlands PEN 1      48 (24)      F 25-36 (3), F                           Owned
Deflandlaan (Amst)                                         37-48 (4).

Deflandlaan            Netherlands PEN 2      72 (36)      F 37-48 (4), F                           Owned
(Amsterdam)                                                49-60 (5), F 61-72
- SC-12                                                    (6).

SC-12 - Leersum        Netherlands PEN 2      48 (24)      F 49-60 (5), F                           Owned
                                                           61-72 (6).

Leersum - SC-13        Netherlands PEN 2      48 (24)      F 49-60 (5), F                           Owned
                                                           61-72 (6).

Elten - SC-13          Netherlands PEN 2      72 (36)      F 37-48 (4), F                           Owned
                                                           49-60 (5), F 61-72
                                                           (6).

Doorn - SC-13          Netherlands PEN 2      24 (12)      F 37-48 (4).                             Owned

SC-12 - Doorn          Netherlands PEN 2      24 (12)      F 37-48 (4).                             Owned

World Trade Centre        Netherlands         48 (24)      F 25-36 (3), F                           Owned
- Deflandlaan                                              37-48 (4).
(Amsterdam)

Deflandlaan               Netherlands         48 (24)      F 25-36 (3), F                           Owned
(Amsterdam) - World                                        37-48 (4).
Trade Centre -

Deflandlaan            Netherlands PEN 1      72 (36)      F 37-48 (4), F                           Owned
(Amsterdam)                                                49-60 (5), F 61-72
- Rotterdam                                                (6).

Rotterdam -            Netherlands PEN 1      72 (36)      F 37-48 (4), F                           Owned
Roosendaal                                                 49-60 (5), F 61-72
                                                           (6).

Rosendaal - Essen      Netherlands PEN 1      72 (36)      F 37-48 (4), F                           Owned
                                                           49-60 (5), F 61-72
                                                           (6).

Essen - Rosendaal      Netherlands PEN 1      72 (36)      F 37-48 (4), F                           Owned
                                                           49-60 (5), F
                                                           61-72 (6).
</TABLE>

                                       55
<PAGE>

BELGIUM

<TABLE>
<CAPTION>
                             TOTAL
                           NUMBER OF
                            FIBRES
                            (NUMBER              SPECIFIC                OPTION                                        FIBRE
                           OF FIBRES           FIBRES TO BE         (CLAUSE 6.1 OR 6.2                                 LEASED
                             TO BE               ALLOCATED                 OF                                          OWNED
NETWORK                    ALLOCATED            TO GV (TUBE              MASTER                                         BY
SECTION                     TO GV)                NUMBER)              AGREEMENT)               COMMENTS               VIATEL
--------------------     -------------     --------------------     ------------------     ----------------------     --------
<S>                      <C>               <C>                      <C>                    <C>                        <C>
Roosendaal - Antwerp        72 (36)        F 37-48 (4), F 49-60     N/A                                                Owned
                                           (5), F 61-72 (6).

Antwerp - Brussels          72 (36)        F 37-48 (4), F 49-60     N/A                    Leased Duct containing      Owned
Tollaan                                    (5), F 61-72 (6).                               VTL fibre leased to
                                                                                           VTL under 20 year IRU.

Brussels Tollaan -          72 (36)        F 37-48 (4), F 49-60     N/A                    Leased Duct containing      Owned
Gent                                       (5), F 61-72 (6).                               VTL fibre leased to
                                                                                           VTL under 20 year IRU.

Gent - Estampuis            72 (36)        F 37-48 (4), F 49-60     N/A                                                Owned
                                           (5), F 61-72 (6).
</TABLE>

UK

                                       56
<PAGE>

PART 1 - DUCTS AND SUB-DUCTS

<TABLE>
<CAPTION>
                                    TOTAL NUMBER
                                     OF DUCTS /
                                      SUBDUCTS
                                     (NUMBER OF                    OPTION                                          DUCT /
                                       DUCTS /                 (CLAUSE 6.1                                        SUBDUCT
                                   SUBDUCTS TO BE              AND/OR 6.2 OF                                      LEASED /
NETWORK                             ALLOCATED TO                    MASTER                                        OWNED BY
SECTION                                  GV)                     AGREEMENT)                  COMMENTS              VIATEL
---------------------------    -----------------------    ----------------------    -------------------------    -----------
<S>                            <C>                        <C>                       <C>                          <C>
UK

Lowestoft beach chamber -      1 Duct / 4 Subducts (2     Clause 6.1.                                            Owned
Lowestoft                             Subducts)

Lowestoft - Telehouse          1 Duct / 4 Subducts (2     Clause 6.1.                                            Owned
North                                 Subducts)

Telehouse North - Egham        1 Duct / 4 Subducts (2     Clause 6.1                3 of the Subducts are        Owned
                                      Subducts)                                     occupied. 2 Subducts
                                                                                    allocated to GV.
                                                                                    VTL retains the right to
                                                                                    use the stretches of its
                                                                                    cables in the allocated
                                                                                    Subduct.

Egham - Windlesham             2 Ducts / 4 Subducts (1    Clauses 6.1 and 6.2.                                   Owned
                                 Duct / 2 Subducts)

Polegate - Polegate beach      1 Duct / 4 Subducts (2     Clause 6.1.                                            Owned
chamber                               Subducts)

DOCKLANDS
</TABLE>

                                       57
<PAGE>

<TABLE>
<CAPTION>
                                    TOTAL NUMBER
                                     OF DUCTS /
                                      SUBDUCTS
                                     (NUMBER OF                    OPTION                                          DUCT /
                                       DUCTS /                 (CLAUSE 6.1                                        SUBDUCT
                                   SUBDUCTS TO BE              AND/OR 6.2 OF                                      LEASED /
NETWORK                             ALLOCATED TO                    MASTER                                        OWNED BY
SECTION                                  GV)                     AGREEMENT)                  COMMENTS              VIATEL
---------------------------    -----------------------    ----------------------    -------------------------    -----------
<S>                            <C>                        <C>                       <C>                          <C>
Telehouse North -              2 Ducts / 4 Subducts (1    Clauses 6.1 and 6.2.      GV allocated empty           Owned
Butchers Road (North route)      Duct / 2 Subducts)                                 Subduct and Subduct
                                                                                    carrying the 72 fibre
                                                                                    cable.
Butchers Road - Telehouse      4 Ducts / 4 Subducts (2    Clauses 6.1 and 6.2       GV allocated empty           Owned
North (South route)              Ducts / 2 Subducts)                                Subduct and Subduct
                                                                                    carrying the 72 fibre
                                                                                    cable.

Lower Lea Bridge (included        4 Ducts (2 Ducts)       Clause 6.1                Ducts leased from BT.        Leased
in Butchers Road -                                                                  GV allocated empty Duct
Telehouse North (South                                                              and Duct carrying the 72
route))                                                                             fibre cable.

Marsh Wall - Limeharbour       4 Ducts / 4 Subducts (2    Clauses 6.1 and 6.2.                                   Owned
                                 Ducts / 2 Subducts)

8-9 Harbour Exchange           4 Ducts / 4 Subducts (2    Clauses 6.1 and 6.2.                                   Owned
connection (lateral 1)           Ducts / 2 Subducts)

8-9 Harbour Exchange           4 Ducts / 4 Subducts (2    Clauses 6.1 and 6.2.                                   Owned
connection (lateral 2)           Ducts / 2 Subducts)
</TABLE>

                                       58
<PAGE>

<TABLE>
<CAPTION>
                                    TOTAL NUMBER
                                     OF DUCTS /
                                      SUBDUCTS
                                     (NUMBER OF                    OPTION                                          DUCT /
                                       DUCTS /                 (CLAUSE 6.1                                        SUBDUCT
                                   SUBDUCTS TO BE              AND/OR 6.2 OF                                      LEASED /
NETWORK                             ALLOCATED TO                    MASTER                                        OWNED BY
SECTION                                  GV)                     AGREEMENT)                  COMMENTS              VIATEL
---------------------------    -----------------------    ----------------------    -------------------------    -----------
<S>                            <C>                        <C>                       <C>                          <C>
SC27 - Lindfield Street        1 Duct / 4 Subducts (2     Clause 6.1.               3 of the Subducts are        Owned
(Contained within                     Subducts)                                     occupied. 2 Subducts
Telehouse North - Egham                                                             allocated to GV.
above)
                                                                                    VTL retains the right to
                                                                                    use the stretches of its
                                                                                    cables in the allocated
                                                                                    Subduct.

Lindfield Street - A13         1 Duct / 4 Subducts (2     Clause 6.1.               3 of the Subducts are        Owned
South (Contained within               Subducts)                                     occupied. 2 Subducts
Telehouse North - Egham                                                             allocated to GV.
above)
                                                                                    VTL retains the right to
                                                                                    use the stretches of its
                                                                                    cables in the allocated
                                                                                    Subduct.

Telehouse North- SC: A 13      1 Duct / 4 Subducts (2     Clause 6.1.               3 of the Subducts are        Owned
(Contained within                     Subducts)                                     occupied. 2 subducts
Telehouse North - Egham                                                             allocated to GV.
above)
                                                                                    VTL retains the right to
                                                                                    use the stretches of its
                                                                                    cables in the allocated
                                                                                    Subduct.
</TABLE>

                                       59
<PAGE>

<TABLE>
<CAPTION>
                                    TOTAL NUMBER
                                     OF DUCTS /
                                      SUBDUCTS
                                     (NUMBER OF                    OPTION                                          DUCT /
                                       DUCTS /                 (CLAUSE 6.1                                        SUBDUCT
                                   SUBDUCTS TO BE              AND/OR 6.2 OF                                      LEASED /
NETWORK                             ALLOCATED TO                    MASTER                                        OWNED BY
SECTION                                  GV)                     AGREEMENT)                  COMMENTS              VIATEL
---------------------------    -----------------------    ----------------------    -------------------------    -----------
<S>                            <C>                        <C>                       <C>                          <C>
Great Eastern Street PC -      1 Duct / 4 Subducts (2     Clause 6.1                3 of the Subducts are        Owned
SC27 (Contained within                Subducts)                                     occupied. 2 Subducts
Telehouse North - Egham                                                             allocated to GV.
above)
                                                                                    VTL retains the right to
                                                                                    use the stretches of its
                                                                                    cables in the allocated
                                                                                    Subduct.

Egham - Great Eastern          1 Duct / 4 Subducts (2     Clause 6.1.               3 of the Subducts are        Owned
Street PC (Contained                  Subducts)                                     occupied. 2 Subducts
within Telehouse North -                                                            allocated to GV.
Egham above)
                                                                                    VTL retains the right to
                                                                                    use the stretches of its
                                                                                    cables in the allocated
                                                                                    Subduct.

PC (Great Eastern              2 Ducts / 2 Subducts (1    Clauses 6.1 and 6.2 of                                 Owned
Street)-Braham Street             Duct / 1 Subduct)       the Master Agreement.
</TABLE>

                                       60
<PAGE>

PART 2 - FIBRES

<TABLE>
<CAPTION>
                              TOTAL NUMBER
                               OF FIBRES           SPECIFIC FIBRES
                               (NUMBER OF               TO BE                                             FIBRE
                              FIBRES TO BE           ALLOCATED TO                                        LEASED/
NETWORK                       ALLOCATED TO             GV (TUBE                                         OWNED BY
SECTION                           GV)                  NUMBER)                      COMMENTS             VIATEL
---------------------------   ------------   ---------------------------   --------------------------   ---------
<S>                           <C>            <C>                           <C>                          <C>
UK

Zandvoort - Lowestoft           48 (24)      F 25-36 (3), F 37-48 (4).                                  Owned.
beach Chamber

Lowestoft beach chamber to      48 (24)      F 25-36 (3), F 37-48 (4).                                  Owned.
Lowestoft-

Lowestoft - Pakenham            72 (36)      F 37-48 (4), F 49-60 (5), F                                Owned
                                             61-72 (6).

Pakenham - Snowhill             72 (36)      F 37-48 (4), F 49-60 (5), F                                Owned
                                             61-72 (6).

Snowhill - Telehouse North      72 (36)      F 37-48 (4), F 49-60 (5), F                                Owned
                                             61-72 (6).

Telehouse North - Egham         96 (48)      F 49-60 (5), F 61-72 (6), F                                Owned
                                             73-84 (7), F 85-96 (8)

Egham - Pease Pottage           72 (36)      F 37-48 (4), F 49-60 (5), F   Includes a section of Duct   Owned
                                             61-72 (6).                    leased from NTL.

Pease Pottage - Polegate        72 (36)      F 37-48 (4), F 49-60 (5), F   Includes a section of Duct   Owned
                                             61-72 (6).                    leased from NTL.

Polegate - Polegate beach       48 (24)      F 25-36 (3), F 37-48 (4).                                  Owned
chamber
</TABLE>

                                       61
<PAGE>

<TABLE>
<CAPTION>
                              TOTAL NUMBER
                               OF FIBRES           SPECIFIC FIBRES
                               (NUMBER OF               TO BE                                             FIBRE
                              FIBRES TO BE           ALLOCATED TO                                        LEASED/
NETWORK                       ALLOCATED TO             GV (TUBE                                         OWNED BY
SECTION                           GV)                  NUMBER)                      COMMENTS             VIATEL
---------------------------   ------------   ---------------------------   --------------------------   ---------
<S>                           <C>            <C>                           <C>                          <C>
Polegate beach chamber -        48 (24)      F 25-36 (3), F 37-48 (4).                                  Owned
Cayeaux sur Mer

DOCKLANDS

O/S Telehouse North -            12 (3)      F 10-12 (share 1).             6 fibres of the 12 fibre    Owned
Butchers Road (North route)                                                cable are allocated to NTL.
                                72 (36)      F 37-72 (4, 5, & 6).

                                144 (72)     F 73-144 (7, 8, 9, 10, 11 &     72 and 144 fibre cables
                                             12).                               are broken / not
                                                                                   continuous.

O/S Telehouse North -           72 (36)      F 37-72 (4, 5, & 6).            72 and 144 fibre cables    Owned
Butchers Road (South route)                                                     are broken / not
                                                                                   continuous.

                                144 (72)     F 73-144 (7, 8, 9, 10, 11 &   Includes a section of Duct
                                             12).                          lease from BT on the Lower
                                                                                   Lea Bridge.

Telehouse North -               144 (72)     F 37-48 (4), F 49-60 (5), F      Includes sections of      Owned
Telehouse East                               61-72 (6).                        Subduct leased from
                                             F 109-120 (10), F 121-132              Fibreway.
                                             (11), F 133-144 (12).

Telehouse East -                24 (12)      F 85-96 (8).                     Includes sections of      Owned
7 Harbour Exchange                                                             Subduct leased from
                                                                                    Fibreway.

7 Harbour Exchange -             12 (6)      F 7-12 (1/2 of tube 1)                                     Owned
8/9 Harbour Exchange
</TABLE>

                                       62
<PAGE>

<TABLE>
<CAPTION>
                              TOTAL NUMBER
                               OF FIBRES           SPECIFIC FIBRES
                               (NUMBER OF               TO BE                                             FIBRE
                              FIBRES TO BE           ALLOCATED TO                                        LEASED/
NETWORK                       ALLOCATED TO             GV (TUBE                                         OWNED BY
SECTION                           GV)                  NUMBER)                      COMMENTS             VIATEL
---------------------------   ------------   ---------------------------   --------------------------   ---------
<S>                           <C>            <C>                           <C>                          <C>
Telehouse East                  36 (18)      F 49-60 (5), F121-126 (1/2       Includes sections of      Owned
- 8/9                                        of tube 11).                      Subduct leased from
Harbour Exchange                                                                    Fibreway.

Telehouse East -                48 (24)      F 37-48 (4), 109-120 (10).       Includes sections of      Owned
                                                                               Subduct leased from
London Hosting Centre                                                               Fibreway.
8/9 Harbour Exchange -          24 (12)      F 25-36 (3).                     Includes sections of      Owned
London Hosting Centre                                                          Subduct leased from
                                                                                    Fibreway

London Hosting Centre -         48 (24)      F 25-36 (3), F 61-72 (6).        Includes sections of      Owned
Telecity Bonnington                                                            Subduct leased from
                                                                                    Fibreway

                                                                                Terminated on FC
                                                                             connectors at Telecity
                                                                                   Bonnington.

London Hosting Centre -          12 (6)      F 19-24 (1/2 half of tube        Includes sections of      Owned
Global Switch                                2).                               Subduct leased from
                                                                                    Fibreway

Telecity Bonnington -           48 (24)      F 13-24 (2), F 37-48 (4).        Includes sections of      Owned
Telehouse North                                                                Subduct leased from
                                                                                    Fibreway

                                                                                Terminated on FC
                                                                             connectors at Telecity
                                                                                   Bonnington.

Global Switch -                 24 (12)      F 13-24 (2).                                               Owned
Telehouse North
</TABLE>

                                       63
<PAGE>

<TABLE>
<CAPTION>
                              TOTAL NUMBER
                               OF FIBRES           SPECIFIC FIBRES
                               (NUMBER OF               TO BE                                             FIBRE
                              FIBRES TO BE           ALLOCATED TO                                        LEASED/
NETWORK                       ALLOCATED TO             GV (TUBE                                         OWNED BY
SECTION                           GV)                  NUMBER)                      COMMENTS             VIATEL
---------------------------   ------------   ---------------------------   --------------------------   ---------
<S>                           <C>            <C>                           <C>                          <C>
Telehouse East                  36 (18)      F 61-72 (6), F 139-144           Includes sections of      Owned
Telehouse North                              (share 12).                       Subduct leased from
                                                                                    Fibreway

Telehouse North                 72 (36)      F 181-192 (16), 193-204          Includes sections of      Owned
Telehouse North                              (17), F 205-216 (18).             Subduct leased from
                                                                                    Fibreway

SC27 - InterXion, Brick         48 (24)      F 25-36 (3), F 37-48 (4).                                  Owned
Lane

InterXion, Brick Lane - L3      48 (24)      F 25-36 (3), F 37-48 (4).                                  Owned
Braham Street
</TABLE>

                                       64
<PAGE>

                                   SCHEDULE V

       VIATEL OPERATING COST CATEGORIES (INCL. DRAFT 2006 BUDGET FIGURES)

NETWORK COSTS 2006 SCHEDULE XI

<TABLE>
<CAPTION>
(Pound) Sterling                         Belgium   France    Germany  Netherlands   UK (NW)    Sub-tot
PROPERTY
<S>                                      <C>      <C>        <C>      <C>          <C>        <C>
Network Property Cleaning                  2,947          0        0            0     14,050     16,997
Network Property Maintenance               5,133      9,446    2,699        6,000      5,500     28,778
Network Property Service Charge            9,227     44,572   20,628       41,921     45,127    161,475
Network Property Taxes                     7,437     14,672        0        2,690    109,671    134,471
Network Property Rent                    160,716    362,038  333,214      266,091    311,312  1,433,369
Network Property Security and Site mtce        0          0        0            0     68,961     68,961
Network Utilities Electricty              43,411    100,421  100,138       78,897    103,950    426,816
Network Utilities Gas                          0     15,000        0            0     17,037     32,037
Rights of Way                                  0  1,772,234   15,931       63,181    308,655  2,160,002
                                         -------  ---------  -------  -----------  ---------  ---------
TOTAL PROPERTY COSTS                     228,870  2,318,383  472,610      458,780    984,263  4,462,906
                                         =======  =========  =======  ===========  =========  =========
REPAIRS & MAINTENANCE

1st Line Equipment Maintenance                 0     85,388        0            0    109,704    195,091
Infrastructure Maintenance               136,922    588,879  342,507      157,172    105,251  1,330,731
Other Maintenance (sub-sea cables)             0    139,450        0            0    148,762    288,212
Hardware Maintenance                           0          0        0            0     15,000     15,000
Lifts & Shifts                            62,486     14,715   16,776       91,761     11,880    197,618
                                         -------  ---------  -------  -----------  ---------  ---------
TOTAL R&M COST                           199,408    828,432  359,283      248,933    390,597  2,026,653
                                         =======  =========  =======  ===========  =========  =========
OTHER

Fixed communications                           0     45,600        0            0          0     45,600
Mobile communications                          0     24,000        0            0          0     24,000
                                                  ---------                                   ---------
TOTAL                                          0     69,600        0            0          0     69,600
                                         =======  =========  =======  ===========  =========  =========
STAFF COSTS
</TABLE>

                                       65
<PAGE>

<TABLE>
<S>                                      <C>      <C>        <C>      <C>          <C>        <C>        <C>
Salaries                                  93,544    175,155   52,626       94,705    409,450    825,480
Travel                                                                                20,000     20,000
                                         -------  ---------  -------  -----------  ---------  ---------
TOTAL                                     93,544    175,155   52,626       94,705    429,450    845,480
                                         =======  =========  =======  ===========  =========  =========
TOTAL                                    521,822  3,391,570  884,519      802,418  1,804,309  7,404,638  (Pound) TOTAL COSTS
                                         =======  =========  =======  ===========  =========  =========
                                                             GV
                                                             COSTS                 Half
                                                                                   (Pound)    3,702,319  inc ROW France
                                                                                   Half Euro  5,331,340  inc ROW France

                                                                                              4,055,331  exc ROW France

                                                                                                107,072  French ROW/month
</TABLE>

                                       66
<PAGE>

                                   SCHEDULE VI

                                     PART I

                                VIATEL WARRANTIES

The following warranties are subject to the qualifications and limitations in
Part II of this Schedule. For the avoidance of any doubt none of these
warranties applies to the GND Asset Transfer or the subject-matter thereof.

1.1   INFORMATION SUPPLIED

      All factual information with regard to the Viatel Group contained in this
      Agreement and all matters contained in the Data Room and all other written
      information relating to the Viatel Network given by Viatel or Viatel's
      Solicitors to Global Voice or Global Voice's Solicitors is true and
      accurate in every material respect and there is no fact or matter relating
      to the Viatel Network which has not been disclosed or made available in
      the Data Room (or by separate provision of documents requested by Global
      Voice) which renders any such matters or information materially untrue or
      misleading.

1.2   CAPACITY

      Viatel and each Viatel Group Company have full power and authority and
      have taken all necessary corporate action to enable each of them
      effectively to enter into and perform this Agreement and the other
      Transaction Documents; this Agreement, when executed, will constitute
      valid, binding and enforceable obligations on Viatel and/or the relevant
      Viatel Group Company in accordance with their respective terms. Neither
      Viatel nor any Viatel Group Company requires the consent, approval or
      authority of any other person to enter into or perform its obligations
      under this Agreement and its entry into and performance of this Agreement
      or any of the other Transaction Documents will not constitute a material
      breach or material default under any contractual, governmental or public
      obligation binding upon it, and it is not engaged in any litigation or
      arbitration proceedings which might have an effect upon its capacity or
      ability to perform its obligations under this Agreement and no such legal
      or arbitration proceedings have been threatened against it.

1.3   TITLE TO THE ASSETS

      Subject as provided in this Agreement, Viatel and its Group Companies have
      good and marketable title to all of the Viatel Transferred Assets. The
      Viatel Transferred Assets are free from any charge, lien or other
      encumbrance, or any obligation to pay any outstanding sums in respect of
      them. Except as provided in this Agreement, no person other than a Viatel
      Group Company has or claims any rights in relation to the Viatel
      Transferred Assets or any of them and the Viatel Transferred Assets are
      not subject to or potentially

                                       67
<PAGE>

      subject to any floating charge or guarantee given by a Viatel Group
      Company or by any person or company connected with a Viatel Group Company.

1.4   THE CUSTOMER CONTRACTS

1.4.1 None of the Customer Contracts is ultra vires the Viatel Group Company
      which is the relevant contracting party.

1.4.2 All the Customer Contracts are in full force and effect and have been duly
      complied with and nothing has occurred whereby any of them is or could be
      subject to early termination or which has given or may give rise to any
      claim under any of them by any party to any of them.

1.4.3 The execution and delivery of this Agreement and the fulfilment and
      performance of and compliance with the terms of this Agreement do not and
      will not:

      1.4.3.1 conflict with, violate or result in a breach of the terms,
              provisions or conditions of any of the Customer Contracts or any
              law, undertaking to or judgment, order, injunction or decree of
              any court;

      1.4.3.2 relieve any person of any contractual or other obligation under
              any of the Customer Contracts or entitle any person to terminate
              any such obligation;

      1.4.3.3 result in any party to any of the Customer Contracts ceasing to
              deal or substantially reducing the existing level of his dealings
              with Viatel and Viatel is not aware of any intention on the part
              of any such customer to cease so to deal or so to reduce the
              existing level of such dealings.

1.5   HEALTH & SAFETY

1.5.1 To Viatel's best knowledge and belief, no works, repairs, construction,
      remedial action or expenditure is or may be required in relation to all
      applicable legislation concerning health and safety matters and all and
      any regulations or orders made or issued under any such legislation and
      any relevant codes or practice, guidance notes and the like with respect
      to such matters issued by government agencies ("HEALTH AND SAFETY
      LEGISLATION") in order to use, operate or maintain the Viatel Transferred
      Assets.

1.5.2 At no time has Viatel had knowledge of and/or received any notice, claim
      or other communication alleging any contravention of or actual or
      potential liability under Health and Safety Legislation with respect to
      the Viatel Transferred Assets.

1.6   LITIGATION

      No Viatel Group Company nor any person for whose acts or omissions it may
      be vicariously liable is engaged in or subject to any civil, criminal or
      arbitration proceedings in relation to the Viatel Transferred Assets or
      any of them, and there are no such proceedings pending or threatened by or
      against Viatel or any such person. There are no

                                       68
<PAGE>

      judgments outstanding against Viatel or any Viatel Group Company which
      affect or might affect any of the Viatel Transferred Assets.

1.7   SOLVENCY OF VIATEL

1.7.1 No order has been made or petition presented, meeting convened or
      resolution passed for the winding up of Viatel nor has any receiver been
      appointed or any distress, execution or other process been levied in
      respect of the Viatel Transferred Assets or any of them.

1.7.2 No composition in satisfaction of the debts of Viatel or scheme of
      arrangement of its affairs or compromise or arrangement between it and
      either or both of its creditors or members or any class of either or both
      of its creditors or members has been proposed, sanctioned or approved.

1.7.3 No distress, distraint, charging order, garnishee order, execution or
      other process has been levied or applied for in respect of the whole or
      any part of the Viatel Transferred Assets.

1.7.4 No event has occurred causing, or which upon intervention or notice by any
      third party may cause, any floating charge (or equivalent in any
      jurisdiction) created by Viatel to crystallise over the Viatel Transferred
      Assets or any of them or any charge created by it to become enforceable
      over the Viatel Transferred Assets or any of them nor has any such
      crystallisation occurred nor is such enforcement in process.

1.8   COMPLIANCE

1.8.1 To Viatel's best knowledge and belief, all legislation and all orders,
      provisions, directions and conditions in relation to the Viatel
      Transferred Assets have been duly complied with in all respects.

1.8.2 All necessary licences, consents, permits, agreements, arrangements and
      authorities (public and private) have been obtained to enable Viatel and
      relevant Viatel Group Companies to use, occupy, operate and maintain
      effectively the Viatel Transferred Assets and the Viatel Sites in the
      manner in which they are now used, occupied, operated and maintained and
      all such licences, consents, permits, agreements, arrangements and
      authorities are valid and subsisting and Viatel knows of no reason why any
      of them should be suspended, cancelled or revoked.

1.9   NETWORK

1.9.1 The ducts included in the Viatel Transferred Assets were, as at the date
      of their respective installation, of a type which is commonly used within
      the telecommunications fixed line infrastructure industry and which are
      suitable for the blowing or pulling of a Lucent G.655 fibre optic cable
      comprising at least 72 fibre optic strands.

                                       69
<PAGE>

1.9.2 The fibre strands included in the Viatel Transferred Assets conformed, as
      at the date of their respective installation, to the ITU recommended
      specifications and other technical specifications as are set out in
      Schedule XIII.

1.9.3 No other warranty is given by Viatel with respect to the condition and/or
      functionality of the Viatel Transferred Assets.

                                       70
<PAGE>

                                     PART II

                        LIMITATIONS ON VIATEL WARRANTIES

1.    FINANCIAL LIMITS

1.1   Viatel shall not be liable in respect of any Warranty Claim unless it has
      a liability in respect of that Warranty Claim in excess of (euro)50,000
      (fifty thousand), excluding any liability for costs and interest.

1.2   Viatel shall not be liable in respect of any Warranty Claim unless it and
      each other Viatel Group Company have an aggregate liability in respect of
      all Warranty Claims in excess of (euro)150,000 (one hundred and fifty
      thousand), excluding any liability for costs and interest, and in such
      circumstances its aggregate liability shall be limited to the amount of
      the excess over (euro)100,000 (one hundred thousand).

1.3   For the purposes of this paragraph, a Warranty Claim which is based on
      more than one event or circumstance, each of which would separately give
      rise to a Warranty Claim, shall be treated as a separate Warranty Claim,
      as the case may be, in respect of each event or circumstance.

1.4   In any case or cases where a Warranty Claim is brought against any Viatel
      Group Company party to any of the Network Leases, Option and Transfer
      Agreements and/or IRU the aggregate liability of such company for all such
      Warranty Claims shall not exceed the following amount in each case (being
      the consideration payable to such company and specified in Schedule X):

<TABLE>
<S>                                      <C>               <C>
VTL (UK) Limited                         UK                (euro)   435,312

Viatel Operations SA                     France            (euro)   472,603

Viatel Global Communications BV          Holland           (euro)   311,438

Viatel Belgium NV                        Belgium           (euro)    83,578

VTL Telecom Gmbh                         Germany           (euro)   512,645

Viatel German Asset Gmbh                 Germany           (euro)   615,980

VTL Inc                                  US                (euro)    68,443

Viatel Circe Assets Limited              UK                (euro) 1,217,000

Viatel Holding (Bermuda) Ltd             Bermuda           (euro)14,783,001
</TABLE>

1.5   The aggregate liability of Viatel for all Warranty Claims arising in
      relation to or affecting either Viatel Transferred Assets or the Viatel
      Group Company disposing of Viatel Transferred Assets in each country shall
      not exceed the following amount in each case (including the amounts
      referred to in paragraph 1.4 above):

                                       71
<PAGE>

<TABLE>
<S>                 <C>
Belgium             (euro)   784,428
France              (euro) 3,052,018
Germany             (euro) 8,365,920
The Netherlands     (euro) 1,245,902
UK                  (euro) 3,097,974
</TABLE>

1.6   The aggregate liability of Viatel for all Warranty Claims shall not exceed
      (euro)20,000,000 (twenty million).

2.    NOTICES

      If Global Voice or any GV Group Company becomes aware of any matter which
      gives or might give rise to a Warranty Claim, taking no account of
      paragraph 1 for these purposes, Global Voice shall give written notice to
      Viatel as soon as reasonably practicable, and in any event on or before
      the date falling fifteen (15) Business Days after the date on which it
      becomes aware of that matter, specifying the matter in reasonable detail,
      the Viatel Warranties which have or which are likely to have been breached
      and its best estimate of the amount of the Warranty Claim or likely
      Warranty Claim.

3.    TIME LIMITS

3.1   Viatel shall not be liable in respect of any Warranty Claim unless notice
      of that Warranty Claim, given in accordance with paragraph 2, is received
      by it on or before the date eighteen (18) months after the date of
      Completion or, in the case of the French Option, the German Option and the
      NBUK Option, on or before the date eighteen (18) months after the Option
      Trigger Date.

3.2   Viatel shall not be liable in respect of any Warranty Claim if, on or
      before the date falling sixty (60) Business Days after the date on which
      notice of that Warranty Claim is received by Viatel, Viatel has remedied
      the relevant breach in all material respects or prevented Global Voice
      from suffering any material loss in respect of the subject matter of that
      Warranty Claim or caused any loss so suffered by Viatel to be made good in
      all material respects. Global Voice shall comply with all reasonable
      requests made by Viatel during that period for the purposes of so
      remedying any such breach or preventing any such loss.

3.3   Viatel shall not be liable in respect of any Warranty Claim (if not
      previously satisfied, settled or withdrawn) unless legal proceedings have
      been validly issued and served on Viatel on or before the date falling one
      hundred and twenty (120) Business Days after the date on which notice of
      that Warranty Claim was served under paragraph 2.

                                       72
<PAGE>

4.    EXCLUSION OF LIABILITY: GENERAL

4.1   Viatel shall not be liable in respect of any Warranty Claim to the extent
      that the matter giving rise to the Warranty Claim is disclosed in the
      Viatel Disclosure Letter or in any of the documents attached to the
      Disclosure Letter or was on display in the Data Room as listed in the
      index of Data Room documents attached to the Viatel Disclosure Letter.

4.2   Viatel shall not be liable in respect of a Warranty Claim to the extent
      that the matter giving rise to the Warranty Claim results from:

      4.2.1 any act or omission before Completion carried out by or omitted at
            the request of or with the approval or acquiescence of Global Voice
            or any other member of the GV Group; or

      4.2.2 any act or omission on or after Completion carried out or omitted by
            or on behalf of Global Voice or any other member of the GV Group; or

      4.2.3 any breach by any GV Group Company of any of its obligations under
            any of the Transaction Documents; or

      4.2.4 any act, event, occurrence or omission after the date of this
            Agreement compelled by law, or the enactment, amendment or change in
            interpretation after that date, of any statute, regulation or
            practice of any governmental, regulatory or other body.

                                       73
<PAGE>

                                    PART III

                                  GV WARRANTIES

1.    INFORMATION SUPPLIED

      All factual information with regard to the GV Group contained in this
      Agreement and all other written information relating to the GV Group and
      the GV Transferred Assets given by Global Voice or Global Voice's
      Solicitors and other lawyers to Viatel or Viatel's Solicitors and their
      other lawyers is true and accurate in every material respect and there is
      no fact or matter relating to the GV Group or the GV Transferred Assets
      which has not been disclosed or made available to Viatel or its Solicitors
      and other lawyers which renders any such matters or information materially
      untrue or misleading.

1.1   CAPACITY OF GLOBAL VOICE

      Global Voice and each GV Group Company have full power and authority and
      have taken all necessary corporate action, held all necessary meetings and
      obtained all necessary approvals, including shareholder approval, to
      enable each of them effectively to enter into and perform this Agreement
      and the other Transaction Documents and this Agreement, when executed,
      will constitute valid, binding and enforceable obligations on Global Voice
      and/or the relevant GV Group Company in accordance with their respective
      terms. Neither Global Voice nor any GV Group Company requires the consent,
      approval or authority of any other person to enter into or perform their
      obligations under this Agreement and their entry into and performance of
      this Agreement will not constitute a material breach or material default
      under any contractual, governmental or public obligation binding upon
      them, and none of them is engaged in any litigation or arbitration
      proceedings which might have an effect upon its capacity or ability to
      perform its obligations under this Agreement and no such legal or
      arbitration proceedings have been threatened against any of them.

1.2   TITLE TO THE ASSETS

      Subject as provided in this Agreement, Global Voice and/or other relevant
      GV Group Company have good and marketable title to all of the GV
      Transferred Assets. The GV Transferred Assets are and on their transfer to
      Viatel will be free from any charge, lien or other encumbrance, or any
      obligation to pay any outstanding sums in respect of them. No person other
      than a GV Group Company has or claims any rights in relation to the GV
      Transferred Assets or any of them or the proceeds of any sale of the GV
      Transferred Assets or any of them and the GV Transferred Assets are not
      subject to or potentially subject to any floating charge or guarantee
      given by a GV Group Company or by any person or company connected with a
      GV Group Company.

                                       74
<PAGE>

1.3   HEALTH & SAFETY

      1.3.1 To Global Voice's best knowledge and belief, no works, repairs,
            construction, remedial action or expenditure is or may be required
            in relation to all applicable legislation concerning health and
            safety matters and all and any regulations or orders made or issued
            under any such legislation and any relevant codes or practice,
            guidance notes and the like with respect to such matters issued by
            government agencies ("HEALTH AND SAFETY LEGISLATION") in order to
            use, operate or maintain the GV Transferred Assets.

      1.3.2 At no time has Global Voice had knowledge of and/or received any
            notice, claim or other communication alleging any contravention of
            or actual or potential liability under Health and Safety Legislation
            with respect to the GV Transferred Assets.

1.4   LITIGATION

      No GV Group Company nor any person for whose acts or omissions it may be
      vicariously liable is engaged in or subject to any civil, criminal or
      arbitration proceedings in relation to the GV Transferred Assets or any of
      them, and there are no such proceedings pending or threatened by or
      against Global Voice or any such person. There are no judgments
      outstanding against Global Voice or any GV Group Company which affect or
      might affect any of the GV Transferred Assets.

1.5   SOLVENCY OF GLOBAL VOICE

      1.5.1 No order has been made or petition presented, meeting convened or
            resolution passed for the winding up of Global Voice nor has any
            receiver been appointed or any distress, execution or other process
            been levied in respect of the GV Transferred Assets or any of them.

      1.5.2 No composition in satisfaction of the debts of Global Voice or
            scheme of arrangement of its affairs or compromise or arrangement
            between it and either or both of its creditors or members or any
            class of either or both of its creditors or members has been
            proposed, sanctioned or approved.

      1.5.3 No distress, distraint, charging order, garnishee order, execution
            or other process has been levied or applied for in respect of the
            whole or any part of the GV Transferred Assets.

      1.5.4 No event has occurred causing, or which upon intervention or notice
            by any third party may cause, any floating charge (or equivalent in
            any jurisdiction) created by Global Voice to crystallise over the GV
            Transferred Assets or any of them or any charge created by it to
            become enforceable over the GV Transferred Assets or any of them nor
            has any such crystallisation occurred nor is such enforcement in
            process.

                                       75
<PAGE>

1.6   COMPLIANCE

      1.6.1 To Global Voice's best knowledge and belief, all legislation and all
            orders, provisions, directions and conditions in relation to the GV
            Transferred Assets have been duly complied with in all respects.

      1.6.2 All necessary licences, consents, permits, agreements, arrangements
            and authorities (public and private) have been obtained to enable
            Global Voice and relevant GV Group Companies to use, operate and
            maintain effectively the GV Transferred Assets in the manner in
            which they are now used, operated and maintained and all such
            licences, consents, permits, agreements, arrangements and
            authorities are valid and subsisting and Global Voice knows of no
            reason why any of them should be suspended, cancelled or revoked.

1.7   NETWORK

      1.7.1 Global Voice hereby warrants and undertakes to Viatel that the fibre
            strands that are included in any of the GV Transferred Assets
            conformed, and/or, as appropriate, shall conform as at the date of
            their respective installation, to the ITU recommended technical
            specifications for dark fibre as are set out in Schedule VIII.

      1.7.2 No other warranty or undertaking is given by Global Voice with
            respect to the condition and/or functionality of the GV Transferred
            Assets.

                                       76
<PAGE>

                                     PART IV

                          LIMITATIONS ON GV WARRANTIES

1.    FINANCIAL LIMITS

1.1   Global Voice shall not be liable in respect of any Warranty Claim unless
      it has a liability in respect of that Warranty Claim in excess of
      (euro)50,000 (fifty thousand), excluding any liability for costs and
      interest.

1.2   Global Voice shall not be liable in respect of any Warranty Claim unless
      it has an aggregate liability in respect of all Warranty Claims in excess
      of (euro)150,000 (one hundred and fifty thousand), excluding any liability
      for costs and interest, and in such circumstances its aggregate liability
      shall be limited to the amount of the excess over (euro)100,000 (one
      hundred thousand).

1.3   For the purposes of this paragraph, a Warranty Claim which is based on
      more than one event or circumstance, each of which would separately give
      rise to a Warranty Claim, shall be treated as a separate Warranty Claim,
      as the case may be, in respect of each event or circumstance.

1.4   In any case or cases where a Warranty Claim is brought against any GV
      Group Company party to any Network Lease, Option and Transfer Agreement,
      and/or IRU and GV Fibre Transfer Agreement, the aggregate liability of
      such company for all such Warranty Claims shall not exceed the following
      amount in each case:

           Global Voice Networks Limited            UK:      (euro)  223,898

           Global Voice Networks BV                 Holland: (euro)6,353,438

           Global Voice Networks AG                 Germany: (euro)6,922,663

1.5   The aggregate liability of Global Voice for all Warranty Claims shall not
      exceed (euro)20,000,000 (twenty million).

2.    NOTICES

      If Viatel or any Viatel Group Company becomes aware of any matter which
      gives or might give rise to a Warranty Claim, taking no account of
      paragraph 1 for these purposes, Viatel shall give written notice to Global
      Voice as soon as reasonably practicable, and in any event on or before the
      date falling fifteen (15) Business Days after the date on which it becomes
      aware of that matter, specifying the matter in reasonable detail, the GV
      Warranties which have or which are likely to have been breached and its
      best estimate of the amount of the Warranty Claim or likely Warranty
      Claim.

                                       77
<PAGE>

3.    TIME LIMITS

3.1   Global Voice shall not be liable in respect of any Warranty Claim unless
      notice of that Warranty Claim, given in accordance with paragraph 2, is
      received by it on or before the date 18 months after the date of
      Completion or, in the case of the French Option, the German Option and the
      NBUK Option, on or before the date 18 months after the Option Trigger
      Date.

3.2   Global Voice shall not be liable in respect of any Warranty Claim if, on
      or before the date falling sixty (60) Business Days after the date on
      which notice of that Warranty Claim is received by Global Voice, Global
      Voice has remedied the relevant breach in all material respects or
      prevented the relevant Viatel Group Company from suffering any material
      loss in respect of the subject matter of that Warranty Claim or caused any
      loss so suffered by the relevant Viatel Group Company to be made good in
      all material respects. Global Voice shall comply with all reasonable
      requests made by Viatel during that period for the purposes of so
      remedying any such breach or preventing any such loss.

3.3   Global Voice shall not be liable in respect of any Warranty Claim (if not
      previously satisfied, settled or withdrawn) unless legal proceedings have
      been validly issued and served on Global Voice on or before the date
      falling one hundred and twenty (120) Business Days after the date on which
      notice of that Warranty Claim was served under paragraph 2.

4.    EXCLUSION OF LIABILITY: GENERAL

      4.1   Global Voice shall not be liable in respect of any Warranty Claim to
            the extent that the matter giving rise to the Warranty Claim is
            disclosed in the GV Disclosure Letter or in any of the documents
            attached to the Disclosure Letter or was on display in the Data Room
            as listed in the index of Data Room documents attached to the GV
            Disclosure Letter.

4.2   Global Voice shall not be liable in respect of a Warranty Claim to the
      extent that the matter giving rise to the Warranty Claim results from:

      4.2.1 any act or omission before Completion carried out or omitted at the
            request of or with the approval or acquiescence of Viatel or any
            other member of the Viatel Group; or

      4.2.2 any act or omission on or after Completion carried out or omitted by
            or on behalf of Viatel or any other member of the Viatel Group; or

                                       78
<PAGE>

      4.2.3 any breach by a Viatel Group Company of any of its obligations under
            any of the Transaction Documents; or

      4.2.4 any act, event, occurrence or omission after the date of this
            Agreement compelled by law, or from the enactment, amendment or
            change in the interpretation after that date, of any statute,
            regulation or practice of any governmental, regulatory or other
            body.

                                       79
<PAGE>

                                  SCHEDULE VII

                                  VIATEL SITES

BELGIUM

<TABLE>
<CAPTION>
           Viatel                    Basis upon
            Site                     which the         Viatel
 Hand      Floor                     allocation        Network
Marked      Plan                     Viatel to        Schematic         ODF          Viatel                                 AC
Drawing   Drawing                   Global Space       Drawing        Access         Access                         DC      UPS
  Ref      Number      Name            Share           Number          point       Controlled     Generator       Power    Power
-------- ----------  ---------     --------------    -----------     ---------     ----------     ---------       -----    -----
<S>      <C>         <C>           <C>               <C>             <C>           <C>            <C>             <C>      <C>
   1       VIATEL     ANTOING       50/50 share        VIATEL-          Yes            Yes           Yes           Yes      No
          -089792                    available         092785
                                    space / M&E
                                      capacity

   2       VIATEL     ANTWERP       50/50 share        VIATEL-          Yes            Yes           Yes           Yes      No
          -089793     BELIEWE        available         092785
                      G             space / M&E
                      (ALASKA)        capacity

   3       VIATEL     ANTWERP       50/50 share        VIATEL-          No             Yes           No             No      No
          -102282     VOSVELD        available         092785
                      20            space / M&E
                                      capacity

   4       VIATEL     ANTWERP       50/50 share        VIATEL-          Yes            Yes           Yes           Yes      No
          -089794     WOMMEL         available         092785
                      GEN           space / M&E
                                      capacity

   5       VIATEL     BRUSSEL       50/50 share        VIATEL-          Yes            Yes           Yes           Yes      Yes
          -090541     S TOLL-        available         092785
                      LAAN          space / M&E
                                      capacity

   6       VIATEL     ESSEN         50/50 share        VIATEL-          Yes            Yes           Yes           Yes      No
          -091549     (BELGIU        available         092785
                      M)            space / M&E
                                      capacity

   7       VIATEL     ESTAMPU       50/50 share        VIATEL-          Yes            Yes           Yes           Yes      No
          -091550     IS             available         092785
                                    space / M&E
                                      capacity

   8       VIATEL     GENT          50/50 share        VIATEL-          Yes            Yes           Yes           Yes      No
          -092195     (MERELB        available         092785
                      EKE)          space / M&E
                                      capacity
</TABLE>

                                       80
<PAGE>

FRANCE

<TABLE>
<CAPTION>
           Viatel                    Basis upon
            Site                     which the         Viatel
 Hand      Floor                     allocation        Network
Marked      Plan                     Viatel to        Schematic        ODF         Viatel                                 AC
Drawing   Drawing                   Global Space       Drawing        Access       Access                         DC      UPS
  Ref      Number      Name            Share           Number          point     Controlled     Generator       Power    Power
-------- ----------  ---------     --------------    -----------     ---------   ----------     ---------       -----    -----
<S>      <C>         <C>           <C>               <C>             <C>         <C>            <C>             <C>      <C>
   10      VIATEL     AMIENS          50/50 share      VIATEL-          Yes          Yes          Yes            Yes       No
          -089787     (PARC            available       092782
                      D'ACTIVIT       space / M&E
                      IES)              capacity

   11      VIATEL     AZY-SUR-        50/50 share      VIATEL-          Yes          Yes          Yes            Yes       No
          -089841     MARNE            available       092782
                      (NOGENT         space / M&E
                      L'ARTAN           capacity
                      D)

   12      VIATEL     BIACHES         50/50 share      VIATEL-          Yes          Yes          Yes            Yes       No
          -089846     (PERONN          available       092782
            & 7       E) #1&2         space / M&E
                      (2x adjacent      capacity
                      container)

   13      VIATEL     CAYEUX-         50/50 share      VIATEL-          Yes          Yes          Yes            Yes       Yes
          -090542     SUR-MER      available space /   092782
                                          M&E
                                        capacity

   14      VIATEL     CONDE-          50/50 share      VIATEL-          Yes          Yes          Yes            Yes       No
          -090546     SUR-             available       092782
                      MARNE           space / M&E
                                        capacity

   15      VIATEL     COURRIE         50/50 share      VIATEL-          Yes          Yes          Yes            Yes       No
          -090549     RES              available       092782
                                      space / M&E
                                        capacity

   16      VIATEL     L'ISLE          50/50 share      VIATEL-          Yes          Yes          Yes            Yes       No
          -092202     ADAM             available       092782
                      (MOURS)         space / M&E
                      (A16)             capacity

   17      VIATEL     MEAUX           50/50 share      VIATEL-          Yes          Yes          Yes            Yes       No
          -092211                      available       092782
                                      space / M&E
                                        capacity

   18      VIATEL     NANCY           50/50 share      VIATEL-          Yes          Yes          Yes            Yes       No
          -092216     RUE              available       092782
                      JAURES          space / M&E
                                        capacity

   19      VIATEL     PARIS 35        50/50 share      VIATEL-        Via 3rd        Yes          Yes            Yes       Yes
          -102124     RUE DES          available       092782          floor
                      JEUNEUR         space / M&E
                      S - 2ND           capacity
                      FLR
                      (BASTILLE)
</TABLE>

                                       81
<PAGE>

<TABLE>
<CAPTION>
           Viatel                    Basis upon
            Site                     which the         Viatel
 Hand      Floor                     allocation        Network
Marked      Plan                     Viatel to        Schematic        ODF         Viatel                                  AC
Drawing   Drawing                   Global Space       Drawing        Access       Access                         DC       UPS
  Ref      Number      Name            Share           Number          point     Controlled     Generator       Power     Power
-------- ----------  ---------     --------------    -----------     ---------   ----------     ---------       -----     -----
<S>      <C>         <C>           <C>               <C>             <C>         <C>            <C>             <C>       <C>
   20      VIATEL     PARIS 35        50/50 share      VIATEL-          Yes          Yes          Yes            Yes       Yes
          -092719     RUE DES          available       092782
                      JEUNEUR         space / M&E
                      S - 3RD           capacity
                      FLR
                      (BASTILL
                      E)

   21      VIATEL     PARIS 38        ODF Access +     VIATEL-          Yes          NO           Yes             No       Yes
          -092720     RUE DES         1 rack space     092782
                      JEUNEUR             only
                      S - 4TH
                      FLR

   22      VIATEL     PARIS LA        50/50 share      VIATEL-          Yes          Yes          Yes            Yes       Yes
          -092721     DEFENSE          available       092782
                      (COURBE         space / M&E
                       VOIE)             capacity

   23       VIATEL     REVIGNY-        50/50 share      VIATEL-          Yes          Yes          Yes            Yes       No
           -092745     SUR-             available       092782
                       ORNAIN          space / M&E
                       (CONTRIS          capacity
                       SON)

   24       VIATEL     STRASBO         50/50 share      VIATEL-          Yes          Yes          Yes            Yes       No
           -092767     URG              available       092782
                                       space / M&E
                                         capacity

   25       VIATEL     THOUROT         50/50 share      VIATEL-          Yes          Yes          Yes            Yes       No
           -092770     TE               available       092782
                                       space / M&E
                                         capacity

   26       VIATEL     TROUSSEY         50/50 share      VIATEL-          Yes          Yes          Yes            Yes      No
           -092775                     available         092782
                       (VILLOROY       space / M&E
                       SUR              capacity
                       MEHOLLE)

   27       VIATEL     XOUAXA          50/50 share      VIATEL-          Yes          Yes          Yes            Yes       No
           -092784     NGE              available       092782
                       (HESSE)         space / M&E
                                         capacity
</TABLE>

                                       82
<PAGE>

GERMANY

<TABLE>
<CAPTION>
           Viatel                    Basis upon
            Site                     which the         Viatel
 Hand      Floor                     allocation        Network
Marked      Plan                     Viatel to        Schematic       ODF         Viatel                                  AC
Drawing   Drawing                   Global Space       Drawing       Access       Access                        DC        UPS
  Ref      Number      Name            Share           Number         point     Controlled     Generator       Power     Power
-------- ----------  ---------     --------------    -----------    ---------   ----------     ---------       -----     -----
<S>      <C>         <C>           <C>               <C>            <C>         <C>            <C>             <C>       <C>
  28       VIATEL     BERG           50/50 share        VIATEL-       Yes          Yes             No           Yes        No
          -089844     VERBUN          available         092786
                      GEMEINDE       space / M&E
                      HAGENBA          capacity
                      CH

  29       VIATEL     DERNBACH       50/50 share        VIATEL-       Yes          Yes             No           Yes        No
          -090800                    available          092786
                                     space / M&E
                                       capacity

  30       VIATEL     DUSSELD        50/50 share        VIATEL-       Yes          Yes             Yes          Yes        No
          -091547     ORF             available         092786
                      HALLE          space / M&E
                      CONNECT          capacity
                      APARK 35
                      STEELE
                      (POP)

  31       VIATEL     ELTEN          50/50 share        VIATEL-       Yes          Yes             No           Yes        No
          -091548                     available         092786
                                     space / M&E
                                       capacity

  33       VIATEL     FRANKFU        50/50 share        VIATEL-       Yes          NO              Yes          Yes        Yes
          -092192     RT 90           available         092786
                      KLEYERS        space / M&E
                      TRASSE           capacity

  34       VIATEL     KAPPELL        50/50 share        VIATEL-       Yes          Yes             No           Yes        No
          -092197     A               available         092786
                      (KAPPELL       space / M&E
                      EN)              capacity

  35       VIATEL     LINZ           50/50 share        VIATEL-       Yes          Yes             No           Yes        No
          -092201                     available         092786
                                     space / M&E
                                       capacity

  36       VIATEL     MANNHEIM       50/50 share        VIATEL-       Yes          Yes             No           Yes        No
          -092208                     available         092786
                                     space / M&E
                                       capacity

  37       VIATEL     NAUROD         50/50 share        VIATEL-       Yes          Yes             No           Yes        No
          -092217                     available         092786
                                     space / M&E
                                       capacity

  38       VIATEL     PORZ           50/50 share        VIATEL-       Yes          Yes             No           Yes        No
          -092732                     available         092786
                                     space / M&E
                                       capacity
</TABLE>

                                       83
<PAGE>

NETHERLANDS

<TABLE>
<CAPTION>
           Viatel                    Basis upon
            Site                     which the         Viatel
 Hand      Floor                     allocation        Network
Marked      Plan                     Viatel to        Schematic       ODF         Viatel                                  AC
Drawing   Drawing                   Global Space       Drawing       Access       Access                        DC        UPS
  Ref      Number      Name            Share           Number         point     Controlled     Generator       Power     Power
-------- ----------  ---------     --------------    -----------    ---------   ----------     ---------       -----     -----
<S>      <C>         <C>           <C>               <C>            <C>         <C>            <C>             <C>       <C>
  39       VIATEL     AMSTERD        approx 95%        VIATEL-         No          Yes            Yes           No        Yes
          -089788     AM            space & M&E        092785
                      HALFWEG       capacity to
                                         GV

  40       VIATEL     AMSTERD       50/50 share        VIATEL-         Yes         Yes            Yes           Yes       Yes
          -089789     AM             available         092785
                      SCHIPLUI      space / M&E
                      DENLAAN         capacity
                      (DELFLAN
                      DLAAN)

  41       VIATEL     DOORN         50/50 share        VIATEL-         Yes         Yes            Yes           Yes       No
          -090801                    available         092785
                                    space / M&E
                                      capacity

  42       VIATEL     LEERSUM       50/50 share        VIATEL-         Yes         Yes            Yes           Yes       No
          -092200                    available         092785
                                    space / M&E
                                      capacity

  43       VIATEL     ROTTERD       50/50 share        VIATEL-         Yes         Yes            Yes           Yes       No
          -092747     AM             available         092785
                      ALBERT        space / M&E
                      PLESMAN         capacity
                      WEG
                      (SOERWE
                      G 5B)

  44       VIATEL     ZANDVO        50/50 share        VIATEL-         Yes         Yes            Yes           Yes       No
          -092793     ORT            available         092785
                                    space / M&E
                                      capacity

  59       VIATEL     AMSTERD       50/50 share        VIATEL-         Yes         Yes           Landlord       Yes       No
          -089790     AM             available         092785
                      WORLD         space / M&E
                      TRADE CENTER    capacity
</TABLE>

                                       84
<PAGE>

UK

<TABLE>
<CAPTION>
           Viatel                    Basis upon
            Site                     which the         Viatel
 Hand      Floor                     allocation        Network
Marked      Plan                     Viatel to        Schematic       ODF         Viatel                                  AC
Drawing   Drawing                   Global Space       Drawing       Access       Access                        DC        UPS
  Ref      Number      Name            Share           Number         point     Controlled     Generator       Power     Power
-------- ----------  ---------     --------------    -----------    ---------   ----------     ---------       -----     -----
<S>      <C>         <C>           <C>               <C>            <C>         <C>            <C>             <C>       <C>
  45       VIATEL     EGHAM          4 Rack space      VIATEL-         Yes          Yes           Yes           Yes       Yes
          -092780     INBUCON         600x600mm        092785
                      HOUSE            powered
                                      footprint

  53       VIATEL     LONDON         6 Rack space      VIATEL-         Yes          NO            Yes           Yes       Yes
          -092205     TELEHOU         600x600mm        092783
                      SE NORTH         powered
                                      footprint

  54       VIATEL     LOWEST         50/50 share       VIATEL-         Yes          Yes           Yes           Yes       No
          -092206     OFT             available        092783
                                     space / M&E
                                       capacity

  55       VIATEL     PAKENHAM       50/50 share       VIATEL-         Yes          Yes           Yes           Yes       No
          -092718                     available        092783
                                     space / M&E
                                       capacity

  56       VIATEL     PEASE          50/50 share       VIATEL-         Yes          Yes           Yes           Yes       No
          -092724     POTTAGE         available        092783
                                     space / M&E
                                       capacity

  57       VIATEL     POLEGATE       50/50 share       VIATEL-         Yes          Yes           Yes           Yes       No
          -092729                     available        092783
                                     space / M&E
                                       capacity

  58       VIATEL     SNOW           50/50 share       VIATEL-         Yes          Yes           Yes           Yes       No
          -092758     HILL            available        092783
                                     space / M&E
                                      capacity

</TABLE>

                                       85
<PAGE>

                                  SCHEDULE VIII

                              GV TRANSFERRED ASSETS

                                     PART I

                       TECHNICAL SPECIFICATIONS FOR CABLES

        NON-ZERO DISPERSION FIBER AND SINGLE MODE FIBER ITU-T G.652D (AW)

SPECIFICATION OF G.652 FIBRES (ALLWAVE)

<TABLE>
<CAPTION>
CHARACTERISTIC                                                           SPECIFICATION
--------------                                                           -------------
<S>                                                                      <C>

1.         Attenuation coefficient ? (maximum)      dB/km                SEE NOTE 1 BELOW= 0.35 dB/Km at
           in the 1300 nm range (+30nm, -15nm)                           1310nm(Maximum Average)

2.         Attenuation coefficient ? (maximum)      dB/km                Not specified for this wavelength range
           in the 1550-1600 nm range

3.         Attenuation coefficient ? (maximum)      dB/km                SEE NOTE 1 BELOW
           at 1550 nm                                                    =  0.23 dB/Km
                                                                         (Maximum Average)

4.         Attenuation coefficient ? (maximum)      dB/km                Not specified for this wavelength range.
           in the 1525 to 1620 nm range

5.         Chromatic Dispersion Parameter ps/nm km                       = 3.5 ps/nm.km
           (maximum) in the 1300mm range (+30mm, - 15mm)
           in the 1300 nm range (+30nm, -15nm)

6.         Chromatic Dispersion Parameters                               = 19.5 ps/nm.Km
           1530 - 1565 nm (maximum) ps/nm km                             Over the wavelength range 1525 - 1575 nm.
           1565 - 1620 nm (maximum) ps/nm km

7.         Dispersion Slope (maximum) ps/nm(2) km                        = 0.093 ps/nm(2).km
                                                                         (Zero dispersion 1312 +/- 12nm)

8.         Polarization mode dispersion (PMD)                            Better than 0,5 ps/?km
           (cabled fibre) (maximum) at 1550 mm ps/?km

9.         Cut-off-wave-length ?cc (maximum) nm                          = 1270nm
</TABLE>

                                       86
<PAGE>

BEHAVIOUR UNDER TENSILE STRESS, BENDING STRESS AND TEMPERATURE FLUCTUATION

<TABLE>
<CAPTION>
CHARACTERISTIC:                                             SPECIFICATION:
---------------                                             --------------
<S>                                                         <C>
Attenuation change?                                         Proof test strain
and fibre stretch under tensile stress at specified force   (During fibre manufacture > or = 1.0% )
under tensile stress at specified force

Attenuation change?                                         SEE NOTE 2 BELOW
under bending stress                                        Level of ?? at commencement and completion of test
1-60 degrees C to + 85 degrees C                             shall be unchanged.

Attenuation change?                                         SEE NOTE 2 BELOW
1-60 degrees C to+85 degrees C                              +/- 0.09dB between -10 degrees C and + 30 degrees C
                                                            (2kM cable length)
Measuring wavelength:  1550 nm.
</TABLE>

DIMENSIONS OF THE OPTICAL FIBRES USED FOR CABLES.

<TABLE>
<CAPTION>
DIMENSIONS:                                                              SPECIFICATION:
-----------                                                              --------------
<S>                                                           <C>        <C>
Sheath Diameter
Individual value                                              mu m       125
Permissible deviation                                         mu m       +/- 2 mu m

Roundness of sheath,                                                     = 2 %
maximum deviation

Concentricity between field and sheath,
maximum deviation                                                        = 0.8 mu m
Individual value, maximum                                     mu m       = 0.4 mu m  (> 5000 Fibre Km)
Average value, maximum                                        mu m

Diameter of optical fibre,
external coating,
including color layer
Rated value                                                   mu m       250 +/- 15 mu m

This is the average value of all optical fibers in the cable.
</TABLE>

NOTE 1:   Parameters are for cabled fibre and constitute the performance, which
          the completed cable shall achieve.

NOTE 2:   Tests conducted on a completed cable.

                                       87
<PAGE>

NOTE 3:   Tests methods following same standards as per G.655 fiber optic cable
          (IEC-793, TIA/EIA-455,  ITU-T  G.650, Bellcore GR-20)

                                     PART II

                                 NETWORK ROUTES

                                       88
<PAGE>

                                 THE NETHERLANDS

<TABLE>
<CAPTION>
CABLE ID                                                                                                                   Cable
AMSTERDAM                                     Ribbon                                                    No. of splices  length in
 NETWORK               Composition          reservation:    Fibers:             Comments:                 necessary:       km:
 -------               -----------          ------------    -------             ---------                 ----------       ---
<S>                 <C>                     <C>             <C>          <C>                            <C>             <C>
AMS-002             432 50/50 TW/AW %            31         361-370                                                         4.8
AMS-003             432 AW                        4           37-46                                                        4.47
AMS-004             432 50/50 TW/AW %            31         361-370                                                       25.19
AMS-005             432 AW                       12         133-142      Cable was cut, all available        2            14.12
                                                                         Ribbons on temp cable are
                                                                         stumped
AMS-006             432 50/50 TW/AW %            29         337-346                                                        4.75
AMS-007             432 50/50 TW/AW %            26         301-310                                                       20.96
AMS-008             432 50/50 TW/AW %            27         313-322                                                       17.37
AMS-004:D001        216 AW                        8           85-94      Not spliced on BB                   2             1.39
AMS-004:D002        216 AW                        2           13-22      Not spliced on BB                   2             3.54
                                                                                                           SUM:           96.59
</TABLE>

<TABLE>
<CAPTION>
CABLE ID
RETTERDAM                                     Ribbon                                                   No. of splices     Cable
 NETWORK               Composition          reservation:   Fibers:              Comments:                necessary:      length:
 -------               -----------          ------------   -------              ---------              --------------    -------
<S>                 <C>                    <C>              <C>          <C>                           <C>              <C>

RTD-001             432 50/50 TW/AW %            23         265-274                                                       12.85

RTD-002             432 50/50 TW/AW %            23         265-274      Cable is not spliced through        7

RTD-002             216 AW                        5           49-58      Cable is not spliced through        5            17.95

RTD-003             216 AW                        4           37-46      Cable is not spliced through        2             2.41
                                                                                                           SUM:           33.21
</TABLE>

<TABLE>
<CAPTION>
CABLE ID
UTRECHET                                   Ribbon                                                    No. of splices    Cable
 NETWORK               Composition       reservation:    Fibers:           Comments:                   necessary:     length:
 -------               -----------       ------------    -------           ---------                 --------------  --------
<S>                 <C>                 <C>             <C>          <C>                             <C>             <C>
UTR-001             216 AW                     1           1-10      Cable is not brought into POP         2             7.98
UTR-002             432 AW                     4          37-46                                                          7.93
UTR-003             216 AW                     4          37-46                                                         34.77
UTR-004             432 TW/AW 50/50 %         19        217-226                                                          7.93
UTR-002:D001        216 AW                     3          25-34      Cable is not spliced through          3             2.60
UTR-003:D001        432 AW                     3          25-34      Cable is not spliced through          2             2.58
                                                                                                           SUM:        63.786
</TABLE>

                                       89
<PAGE>

DUSSELDORF

<TABLE>
<CAPTION>
BACKBONECABLE-
   NUMBER              LENGTH       RIBBON          FIBER-NUMBER
   ------              ------       ------          ------------
<S>                    <C>          <C>             <C>
DUS-2                   22995 m       18               205-214
DUS-3                    3810 m       18               205-214
DUS-5                    1674 m       18               205-214
DUS-7abc                 4544 m       18               205-214
DUS-8a                   1950 m       18               205-214
DUS-8b                    960 m       18               205-214
DUS-9                   10332 m       18               205-214
DUS-10                  11673 m       18               205-214
DUS-12                    2114m       18               205-214
</TABLE>

FRANKFURT

<TABLE>
<CAPTION>
BACKBONECABLE-
    NUMBER                    LENGTH       RIBBON         FIBER-NUMBER
    ------                    ------       ------         ------------
<S>                           <C>          <C>            <C>
FRA-2                          1547 m       35              409-418
FRA-4                          3361 m       34            397 - 406
FRA-5                         13205 m       34            397 - 406
FRA-6                         12685 m       18              205-214
FRA-7                          2406 m      8/9               95-104
FRA-7.1                        1566 m       33            385 - 394
FRA-7.2                        3779 m       15              169-178
FRA-9                          2857 m       15             171 -180
FRA-10                        22394 m       15             171 -180
FRA-11                         1380 m       18              205-214
FRA-12                         2138 m       17              193-202
FRA-13                         2035 m       17              193-202
FRA-14                         1254 m       11             121 -130
FRA-17                         1790 m       13              145-154
FRA-19                          445 m       11             121 -130
FRA-30                        26543 m       18              205-214
</TABLE>

                                       90
<PAGE>

HAMBURG

<TABLE>
<CAPTION>
BACKBONECABLE-
    NUMBER           LENGTH      RIBBON          FIBER-NUMBER
    ------           ------      ------          ------------
<S>                  <C>         <C>             <C>
HAM-1.1               8529 m       18               205-214
HAM-2                 8966 m       18               205-214
HAM-3                 3698 m       18               205-214
HAM-4.1               1864 m       18               205-214
HAM-5                 2154 m       18               205-214
HAM-6                 4930 m       18               205-214
HAM-7                20303 m       18               205-214
HAM-8                 1049 m       18               205-214
</TABLE>

For all routes the allocated fibres will be provided on one continuous length
along the route of each specified cable.

                                       91
<PAGE>

                                   SCHEDULE IX

                         INFLATION INDEXATION MECHANISMS

                                     PART I

                CLAUSE 4.12: MAINTENANCE COSTS PAYABLE BY VIATEL

1.    With respect to Clause 4.12, the maximum amount chargeable with respect to
      Global Voice's maintenance costs in respect of each calendar year shall be
      increased by the percentage increase for inflation calculated in
      accordance with paragraph 2.

2.    The percentage increase shall be calculated by comparing the CSPI or the
      equivalent index in the relevant jurisdiction last published in the three
      (3) month period preceding the expiry of the twelve (12) month period
      preceding commencement of the Adjustment Period with the CSPI published in
      the corresponding month in the Adjustment Period and expressing the
      difference as a percentage of the first published CSPI. Any percentage
      increase shall be calculated to two (2) decimal places and may be rounded
      up if the calculation results in a value of 0.05 or more or rounded down
      if below this value. If this calculation results in a negative value, the
      percentage adjustment shall be treated as zero for the purposes of this
      indexation mechanism.

                                     PART II

            INFLATION INDEXATION ELSEWHERE IN A TRANSACTION DOCUMENT

1.    This paragraph applies when a specific inflation indexation mechanism for
      maintenance costs or charges is stipulated elsewhere in a Transaction
      Document. Where this is the case, the inflation indexation mechanism in
      that Transaction Document shall apply instead of the mechanism specified
      in this Schedule IX as if that mechanism were incorporated into this
      Schedule together with such interpretative provisions set out in the
      Transaction Document in question as may be necessary to interpret that
      mechanism.

                                       92
<PAGE>

                                   SCHEDULE X

                               PAYMENTS TO VIATEL

                             (ALL FIGURES IN EUROS)

<TABLE>
<S>                                <C>         <C>
VTL (UK) LIMITED                   UK             435,312

VIATEL OPERATIONS SA               FRANCE         472,603

VIATEL GLOBAL COMMUNICATIONS BV    HOLLAND        311,438

VIATEL BELGIUM NV                  BELGIUM         83,578

VTL TELECOM GMBH                   GERMANY        512,645

VIATEL GERMAN ASSET GMBH           GERMANY        615,980

VTL INC                            US              68,443

VTL-TP (BERMUDA) LIMITED           BERMUDA     13,333,000

VIATEL CIRCE ASSETS LIMITED        UK           1,217,000

VIATEL HOLDING (BERMUDA) LTD       BERMUDA      1,450,001

TOTAL                                          18,500,000
</TABLE>

                                       93
<PAGE>

                                   SCHEDULE XI

                            INTENTIONALLY LEFT BLANK

                                       94
<PAGE>

                                  SCHEDULE XII

                      CURRENT GLOBAL VOICE ON-NET BUILDINGS

1.    Building (Site and Location):

<TABLE>
<CAPTION>
 MONTHLY
RECURRING
  CHARGE          COMPANY
PER PATCH           NAME             BUILDING            ADDRESS               POST CODE          TYPE               CITY
---------   ----------------------   --------   ---------------------------    ---------   ------------------      ----------
<S>         <C>                      <C>        <C>                             <C>        <C>                     <C>
    No      InterXion                           Cessnalaan 1-33                 1119 NJ    Neutral Colocation      Amsterdam

    No      Redbus                              GYROSCOOPWEG 2E-2F              1042ab     Neutral Colocation      Amsterdam

    No      InterXion                           GYROSCOOPWEG 60                 1042 AC    Neutral Colocation      Amsterdam

    No      NIKHEF                              KRUISLAAN 409                   1098 SJ    Neutral Colocation      Amsterdam

   Yes      TeleCity                            KRUISLAAN 411                   1098 SJ    Neutral Colocation      Amsterdam

   Yes      TELECITY                            KUIPERBERGERWEG 13              1101 AE    Neutral Colocation      Amsterdam

    No      Viatel                              Konigshof, Delflandlaan 4       1062 EB                            Amsterdam

    No      Interxion                  29       IN DER STEELE                   40599      Neutral Colocation      Dusseldorf

    No      Viatel                     35       IN DER STEELE                   40599      POP                     Dusseldorf

   Yes      IX EUROPE                  27       Albertstrasse                   40233      Neutral Colocation      Dusseldorf

    No      Myloc                      44       AM GATHERHOF                    40472      Neutral Colocation      Dusseldorf

   Yes      GLOBAL SWITCH              110      Eschborner Landstrasse          60489      Neutral Colocation      Frankfurt

</TABLE>

<PAGE>

<TABLE>
<CAPTION>
 MONTHLY
RECURRING
  CHARGE          COMPANY
PER PATCH           NAME             BUILDING            ADDRESS               POST CODE          TYPE               CITY
---------   ----------------------   --------   ---------------------------    ---------   ------------------      ----------
<S>         <C>                      <C>        <C>                             <C>        <C>                     <C>

   Yes      Telecity                   310      GUTLEUTSTRASSE                  60327      Neutral Colocation      Frankfurt

    No      Interxion                  302      Hanauer Landstrasse             60314      Neutral Colocation      Frankfurt

    No      Interxion                  304      Hanauer Landstrasse             60315      Neutral Colocation      Frankfurt

   Yes      Telehaus Kleyerstrasse     90       KLEYERSTRASSE                   60326      Neutral Colocation      Frankfurt

    No      REDBUS                     28       LYONERSTRASSE                   60528      Neutral Colocation      Frankfurt

    No      Telia                      55       REBSTOCKERSTRASSE 55            60326      Competitive Carrier     Frankfurt

   Yes      Level 3                    22       RUSSELSHEIMER STRASSE           60489      Competitive Carrier     Frankfurt

    No      Itenos                     25-31    REBSTOCKERSTRASSE 25            60326      Neutral Colocation      Frankfurt

    No      Interxion                  21-23    Weissmullerstrasse              60314      Neutral Colocation      Frankfurt

   Yes      IXEUROPE                   7-9      TAUBENSTRASSE                   60313      Neutral Colocation      Frankfurt

    No      NT TELCOTRUST                       WENDENSTRASSE 375-379           20537      Neutral Colocation      Hamburg

    No      VERSATEL NEDERLAND BV      62       Vlaardingweg 62                 3044 CK    Competitive Carrier     Rotterdam
                                                                                           POP

   TBD      Redbus                              6-7 HARBOUR EXCHANGE SQUARE     E14 9GE    Neutral Colocation      London

</TABLE>

                                        2
<PAGE>

<TABLE>
<CAPTION>
 MONTHLY
RECURRING
  CHARGE          COMPANY
PER PATCH           NAME             BUILDING            ADDRESS               POST CODE          TYPE               CITY
---------   ----------------------   --------   ---------------------------    ---------   ------------------      ----------
<S>         <C>                      <C>        <C>                             <C>        <C>                     <C>
   TBD      Telecity                            8-9 HARBOUR EXCHANGE            E14 9GE    Neutral Colocation      London
                                                  SQUARE
</TABLE>

2.             Cost of Access

A monthly recurring charge (MRC) will be applied to 8 sites (not including
London), in line with GV based costs at each location. London charges will be
applied if applicable when the network is made operational. 150 Euro MRC will be
applied per patch. 5 patches required (10 fibre strands) per data centre.
Resulting MRC that Viatel will be invoiced is 6000 Euro per Month (8 data
centres x (euro) 150 x 5 patches).

                                        3
<PAGE>

                                  SCHEDULE XIII

                          ITU SPECIFICATIONS FOR FIBRES

The dark fibre strands comprised within the Viatel Network, as at the date of
their respective installation, conformed to ITU-T recommended technical
specifications for dark fibre as follows:

(a)   G.652 - (i) 72 fibres within the 144 fibre strand composite cable, 24
      fibres within the 48 fibre strand composite cable, 36 fibres within the 72
      fibre strand composite cable and 72 fibres within a 216 fibre strand
      composite cable (the balance of fibres within each such composite cable
      being G.655) as such composite cables are installed within the UK
      Docklands Ring (the Docklands Ring comprising those elements of network as
      are detailed in Appendix A ; (ii) the entire 192 fibre strand cable
      between Pont Tolbiac and La Defense, Paris, France; and (iii) a stretch of
      approximately 150 metres at Lock Offenbach on the fibre within the leased
      duct of WSA in Frankfurt (which is a temporary fibre installation, it
      being the intention of Viatel to replace the same with a permanent fibre
      installation of cable meeting the G.655 specification once the local river
      authority have completed ongoing construction works (which are currently
      anticipated to complete in early 2007));

(b)   G.654 for submarine and beach joint transition cables; and

(c)   G.655 for the remainder of the terrestrial segments of the Network.

No warranty or guarantee is given as to the condition of and/or functionality of
the fibres comprised within the Network other than as expressly set out in
Schedule VI.

                                        4
<PAGE>

                                  SCHEDULE XIV

                                DEED OF COVENANT

      VIATEL

DEED OF COVENANT

(1)   [TRANSFEROR - TO BE SPECIFIED]

(2)   [TRANSFEREE - TO BE SPECIFIED]

(3)   [VIATEL GROUP COMPANY - TO BE SPECIFIED]

                                       2
<PAGE>

DATED:

PARTIES:

(1)   [RELEVANT GLOBAL VOICE GROUP COMPANY] [under number - ] whose [registered
      office/principal place of business] is at [ - ] ("TRANSFEROR"); and

(2)   [               ] (Company Registration Number [_____________________])
      whose registered office is at [           ] ("TRANSFEREE")

(3)   [RELEVANT VIATEL GROUP COMPANY] [under number - ] whose [registered
      office/principal place of business] is at [ - ]("VIATEL").

RECITALS

(A)   The Transferor has agreed to assign, transfer, lease, licence the use of
      or otherwise create rights or interests in certain assets and associated
      agreements to and in favour of the Transferee.

(B)   The Transferee acknowledges that such assets are located in premises or
      facilities owned or leased by Viatel and Viatel may have
      telecommunications infrastructure and equipment located in such facilities
      or premises.

(C)   The Transferor is required to ensure that the Transferee shall enter into
      a deed of covenant with the Transferor and Viatel and the Transferee has
      agreed to enter into this Deed accordingly.

OPERATIVE PROVISIONS:

1.    DEFINITIONS

1.1   In this Deed, the definitions in the Schedules to this Deed shall apply,
      and in addition to the following words and expressions shall have the
      meaning set opposite:

"ASSETS"                          the physical assets listed in Schedule One to
                                  this Deed;

"BUSINESS DAY"                    all days excluding Saturdays and Sundays and
                                  any day on which either the London Stock
                                  Exchange is closed for the transaction of
                                  business;

"MASTER AGREEMENT"                the agreement with the title Master Network
                                  Lease and Sale Agreement made between Viatel
                                  Holding (Bermuda) Limited, VTL-TP (Bermuda)
                                  Limited and Global Voice Group

<PAGE>

                                  Limited and dated 15 June 2006;

"NETWORK OPERATIONAL AGREEMENT"   the agreement with that title made between
                                  Viatel Holding (Bermuda) Limited and Global
                                  Voice Group Limited and dated 15 June 2006;

"SUBJECT AGREEMENT"               [INSERT TITLE OF RELEVANT SUBJECT AGREEMENT];

"VIATEL NETWORK"                  the meaning in the Master Agreement; and

"VIATEL SITE(S)"                  premises occupied or used by Viatel Group
                                  Companies (as defined in the Master Agreement)
                                  on the Viatel Network.

1.2   References in this Deed to the Transferor and Viatel shall include their
      respective successors in title.

2.    TRANSFEREE'S COVENANTS

      The Transferee covenants and undertakes with the Transferor and Viatel
      that it shall:

2.1   observe and perform the covenants, undertakings and obligations expressed
      to be observed and performed on the part of the Transferor in the Subject
      Agreement;

2.2   observe and perform all standard access rules and procedures stipulated by
      Viatel and/or applicable to Viatel Sites and to which the Transferor
      wishes to grant the Transferee rights of access;

2.3   observe and perform the Covenants contained in Schedule Two to this Deed;

2.4   comply with the Interconnection and Access Procedures contained in
      Schedule Three to this Deed;

2.5   not dispose of the Assets or any part to any person, firm or company
      ("THIRD PARTY") without first ensuring that such third party has executed
      a deed directly with the Transferor and Viatel containing an obligation on
      such third party's part to observe and perform the covenants and comply
      with the procedures set out in the Schedules this Deed.

3.    CONTRACTS (RIGHTS OF THIRD PARTIES) ACT 1999

      Unless otherwise expressly stated, nothing in this Deed shall create or
      confer any rights or other benefits pursuant to the Contracts (Rights of
      Third Parties) Act 1999 in favour of any person other than the parties to
      this Deed.

DELIVERED as a Deed on the date stated above.

<PAGE>

SIGNED as a DEED by                       )

[NAME OF TRANSFEREE] acting by two/a      )

director[s] [and its secretary]           )

                                          Director

                                          Director/Secretary

<PAGE>

                                  SCHEDULE ONE

                                    [ASSETS]

<PAGE>

                                  SCHEDULE TWO

                                    COVENANTS

The Transferee covenants with the parties as follows:

1.    To keep its equipment and/or infrastructure which is situated on any land
      or property of any other(s) or other person(s) ("LANDOWNER") having
      rights, at any given time, in any part of the land on which the Viatel
      Network is located (all of which shall, for the purposes of this Schedule
      Two, be together referred to as the "TRANSFEREE'S COMMUNICATIONS
      INFRASTRUCTURE") in good and substantial repair and condition it being
      agreed that the provisions of this paragraph 1 shall not apply to the
      Transferee to the extent that either one of the parties to this Deed is
      responsible for maintaining any of the Transferor 's Communications
      Infrastructure.

2.    In the course of carrying out any works on any Landowner's land or
      property in respect of the installation, alteration or maintenance of any
      of the Transferee's Communications Infrastructure, to use all reasonable
      endeavours to avoid any physical damage to any part of the Landowner's
      land or property and, in the event that any damage is so caused, the
      Transferee shall as soon as is practicable after such damage has occurred
      carry out or cause to be carried out at its own expense any such repair
      works as are necessary so that the Landowner's land or property so damaged
      is restored to the condition it was in prior to such damage occurring.

3.    Not to do anything which is or may become a nuisance or annoyance to any
      party to this Deed, any Landowner or any owner or occupier of neighbouring
      or adjoining property, or which may cause damage to the land or property
      of any Landowner or to any neighbouring or adjoining property including
      damage attributable to the neglect, default or carelessness of Transferee
      and/or its employees, agents, visitors, sub-tenants, contractors or
      licensees.

4.    To observe and comply with the provisions and requirements of all
      legislation (including, but without limitation, any and all health and
      safety legislation) whether public or local directly affecting the
      Transferee's Communications Infrastructure and/or the Viatel Network or
      the use of the same, including without limitation planning and
      telecommunications legislation, and not to do or omit anything affecting
      the land or property of any Landowner which is in breach of such
      legislation but to do and provide everything required to be done or
      required by such legislation and to indemnify Viatel against all
      proceedings, penalties, costs or claims in respect of any acts or
      omissions in breach of such legislation.

5.    That if the Transferee receives notice of any order or proposal under any
      legislation, to give notice thereof to Viatel immediately and, insofar it
      relates to the Transferee's Communications Infrastructure, if so
      reasonably required by Viatel, to make or join with

<PAGE>

      Viatel in making such objections or representations in respect of any
      order or proposal as Viatel may reasonably require and to comply at its
      own cost with any notice or order relating to Viatel under any such
      legislation.

6.    That if Viatel is required by any governmental or public authority,
      Landowner or other person having the authority so to require, to relocate
      any segment of the Viatel Network in which is located any Transferee's
      Communications Infrastructure, to give Viatel all such assistance as
      Viatel may reasonably require in connection with such relocation works.

7.    Not to use the Transferee's Communications Infrastructure or any part
      thereof nor to permit the same to be used for any illegal or immoral
      purposes nor shall it permit or suffer to be done in or upon the
      Transferee's Communications Infrastructure anything which in the
      reasonable opinion of Viatel and/or any Landowner may or might become a
      danger or nuisance to Viatel and/or any Landowner, their licensees,
      tenants or the occupiers of any adjoining or neighbouring property or to
      the general public and, at its own expense, it shall take all reasonable
      precautions as may be necessary for the avoidance thereof.

8.    Not to do or permit to be done during the carrying out of any
      interconnection or other works in connection with the Transferee's
      Communications Infrastructure anything which may cause any interference
      with or obstruct or which may cause delay to traffic on any road forming
      part of any land or property of any Landowner or any injury or damage to
      any other property of the Landowner.

<PAGE>

                                 SCHEDULE THREE

                      INTERCONNECTION AND ACCESS PROCEDURES

A     GENERAL

1.    Each party undertakes that in exercising any right to interconnect their
      respective Networks at a Point of Interconnection, and/or to access, as
      applicable, the Viatel Chambers for the purpose of inspecting, maintaining
      and/or installing or making alterations to their respective Networks (as
      such rights of access are detailed in the Deed), it shall comply with
      these Joint Interconnection and Access Procedures.

2.    For the purposes of these Joint Interconnection and Access Procedures, the
      following words shall have the following meanings:

      "Allocated Fibres"                shall mean those fibres allocated by
                                        Global Voice to Transferee;

      "Business Hours"                  means the hours from 9am to 5pm (local
                                        time) on any Business Day;

      "Chamber"                         means a Viatel cable chamber and
                                        "Chambers" shall be construed
                                        accordingly;

      "Emergency Interconnection Works" means all interconnection works which
                                        are unscheduled and which are required
                                        solely to restore the provision of
                                        service on the relevant party's Network;

      "Interconnection MOP"             means a method of procedure with respect
                                        to any proposed interconnection works,
                                        in accordance with the pro-forma MOP set
                                        out in Schedule Five, providing full
                                        details as to how the works are to be
                                        carried out;

      "Network"                         means, as the context shall require,
                                        either a telecommunications network
                                        owned and operated by the Transferee or
                                        the Viatel Network;

      "ODF"                             means an optical distribution frame; and

      "Point of Interconnection"        means any physical point (being an ODF,
                                        fibre splice or other access point)
                                        where it is technically feasible to
                                        connect the Viatel Network and the
                                        Transferee's Communications

<PAGE>

                                        Infrastructure so as to enable data and
                                        other traffic to pass between the two
                                        Networks; and "Points of
                                        Interconnection" shall be construed
                                        accordingly.

3.    Notwithstanding the provisions set out in these Joint Interconnection and
      Access Procedures, where the Viatel Network comprises leased or licensed
      assets, namely where the asset is used and enjoyed by Viatel and/or any of
      its group companies subject to a lease, licence or other agreement with a
      third party, alternative interconnection and access arrangements shall
      apply. Viatel can make no commitment that any interconnection or access
      arrangements will be possible given the nature of such assets.

B.    ACCESS

1.    All access by Transferee to any site owned by or leased to Viatel or to a
      Viatel Facility shall be subject to, respectively, such arrangements as
      are included in the agreement between Transferor and Transferee.

2.    Access by either party to any Chamber on the Network of the other party
      and/or, in the case of Viatel, to any Transferee facility, shall be
      subject to the provisions of these Joint Interconnection and Access
      Procedures.

3.    Each party reserves the right to be present and supervise any access by
      the other to any Chamber on its Network. Any such supervision shall not
      relieve the party being granted access to a Chamber from its obligation to
      comply in full with these Joint Interconnection and Access Procedures.

C.    INTERCONNECTION WORKS - GENERAL

1.    Each party shall take all necessary precautions (including any required by
      applicable health and safety legislation) to protect the other party's
      property (and/or that of a third party) from any physical damage during
      the course of any interconnection works.

2.    In the event of any damage being caused to the other party's property
      (and/or that of a third party) in carrying out any such works as
      contemplated by these Joint Interconnection and Access Procedures, whether
      to fibre, duct, equipment or to other items, the working party shall make
      good, at its own cost, any such damage so caused.

D     FIBRE INTERCONNECTION AT AN ODF

1.    Other than in the case of Emergency Works, no less than 2 Business Days'
      notice shall be given of any proposed interconnection at any ODF on the
      Network of the other party, such notice to be accompanied by an
      Interconnection MOP specific to the proposed works. Upon receipt of such
      notice, the Interconnection MOP procedure set out in Section F shall
      apply.

<PAGE>

2.    The requirement set out in Section D(1) shall not apply in the case of
      Emergency Works, provided however that as much notice as is reasonably
      possible in the circumstances shall be given (which notice may,
      notwithstanding the provisions of Clause [ ] be verbal and/or email notice
      for these purposes) to the network operations centre ("NOC") of the other
      party. Such notice shall provide as much detail as to the nature of the
      required works as is reasonably practicable in the circumstances. No
      Emergency Works shall be undertaken without the verbal approval being
      given by the relevant NOC. Each party shall procure that their respective
      NOCs respond as expeditiously as possible in the circumstances.

3.    The party carrying out the interconnection works shall be entitled to make
      its Point of Interconnection at the (customer facing) ports for its
      Allocated Fibres (or any part thereof) on the opposite side of the ODF to
      that of the other party.

4.    The party carrying out the interconnection works shall be responsible for
      the cost of any internal patch cabling (including the provision of
      suitable connectors) required to provide an interconnect with the other
      party's ODF, including, where the fibres have not been connected by the
      other party to its side of the ODF, the costs of any required pigtails or
      other patch cords required to do so.

5.    Connectors shall all be of the type SC-UPC other than where, in the
      applicable fibre specification, that specification states otherwise.

6.    In accessing the ODF, whether for the purposes of implementing a Point of
      Interconnection or otherwise, the party carrying out the interconnection
      works shall comply with the applicable access procedures of the other for
      the site in which such ODF is located, such access procedures in any event
      to be reasonable and of a nature standard within the telecommunications
      industry. In the case of a Viatel ODF, such access shall be made, in the
      case of a Viatel Site, in accordance with the Viatel Site Access
      Procedures and in the case of a Viatel Facility, in accordance with the
      Viatel Facility Access Procedures.

E     FIBRE INTERCONNECT/CIVIL WORKS AT A CHAMBER

1.    Subject to Section E(2) below, each party shall be responsible for
      performing (at its own cost) all excavation, digging and construction
      works (together "CIVIL WORKS"), as well as all cabling, splicing and/or
      testing works required in order to implement a Point of Interconnection
      between its own Network and that of Viatel. Any such works shall, without
      prejudice to and notwithstanding the terms and conditions set out in this
      Schedule, be carried out in accordance with standard industry practice for
      such works and with due regard to the nature of the particular Chamber in
      question and in accordance with the practice of a competent provider of
      such services.

2.    All Civil Works to be carried out within a Chamber shall be carried out
      either by and/or under the direct supervision of the owner of such
      Chamber, any reasonable costs

<PAGE>

      associated with such works and/or supervision which are incurred by that
      owner being reimbursed to it in accordance with the provisions of Section
      H.

3.    Subject to Sections E(5) and F below, the party proposing to carry out any
      such Civil Works at or within the Chamber of the other shall provide to
      the other an Interconnection MOP in all cases where such works: (i)
      include any duct and/or fibre interconnection works (including any related
      cabling, splicing and/or testing works) at a Chamber; or (ii) will
      necessitate the opening of any Chamber for the purpose of installing new
      fibre optic cable. Upon receipt of such Interconnection MOP, the
      Interconnection MOP procedure set out in Section F shall apply.

4.    The Interconnection MOP having been agreed by the parties in accordance
      with Section F, at least 15 Business Days' notice (or such a shorter
      period as is agreed by the parties) must be given of any intention to
      understate the relevant Civil Works.

5.    The notice requirements set out above shall not apply in the case of
      Emergency Works provided however that as much notice as is reasonably
      practicable in the circumstances shall be given to the other party, (which
      notice may, notwithstanding the provisions of Clause [ ]) be verbal and/or
      e-mail notice for these purposes) to the NOC of the other party. Such
      notice shall provide as much detail as to the nature of the required works
      as is reasonably practicable in the circumstances. No Emergency Works
      shall be undertaken without the verbal approval being given by the
      relevant NOC. Each party shall procure that their respective NOCs respond
      as expeditiously as possible in the circumstances. Approval shall only be
      given in relation to access to the relevant Chamber: access to the splice
      closures (and any related work thereon) within such Chamber being only
      available to the owner of such Chamber.

F     INTERCONNECTION MOP PROCEDURE

1.    Upon receipt of the Interconnection MOP, the receiving party may require,
      acting reasonably, that all or any part of the planned works should not be
      carried out where it believes that such works will constitute a breach of
      health and safety legislation and/or where any such works might breach any
      obligations owed to a Landowner or adversely impact the services,
      equipment and/or network of itself and/or of any third party. In such an
      event, the two parties shall use all reasonable endeavours to agree a new
      method of working which accommodates and addresses the technical
      requirements and concerns of both. In default of an agreement as to a
      revised method of working, the matter will be referred to the CHIEF
      TECHNICAL OFFICER for Viatel and equivalent for Transferee.

2.    In the event that the party on whom the Interconnection MOP has been
      served has not within: (i) 2 Business Days, in the case of fibre
      interconnection at an ODF; or (ii) 5 Business Days, in the case of Civil
      Works at a Chamber, notified the other party that it will require changes
      to the Interconnection MOP, then the Interconnection MOP shall be deemed
      approved.

<PAGE>

3.    Approval of the MOP, whether deemed or otherwise, shall not in any way
      operate so as to limit the submitting party's liability under the terms
      and conditions of this Deed and it shall be the submitting party's
      responsibility to comply fully with such terms and conditions at all
      times.

G     COMPLETION PROCEDURE

      Following completion of any works as contemplated by this Deed, the party
      carrying out any such works shall provide, at its own cost, the other with
      appropriate documentation sufficient to allow that other to comply, on a
      timely basis, with any obligations it may have (if any) under the New
      Roads and Street Works Act 1991 (or any similar or analogous legislation
      in any other country in which such works may be carried out) in relation
      to the works carried out upon or in relation to its Network.

H     COSTS

      Where the provisions of this Schedule state that costs of one party are to
      be borne by the other party, reference to costs shall be deemed to mean
      the reasonable costs incurred (the party having incurred such costs having
      used reasonably endeavours to minimise the same) plus an administrative
      charge of 15% (exclusive of VAT).

<PAGE>

                                      GE 1

GV

DEED OF COVENANT

(1)   [TRANSFEROR - TO BE SPECIFIED]

(2)   [TRANSFEREE- TO BE SPECIFIED]

(3)   [GLOBAL VOICE GROUP COMPANY- TO BE SPECIFIED]

<PAGE>

DATED:

PARTIES:

(1)   [RELEVANT VIATEL GROUP COMPANY] [under number - ] whose [registered
      office/principal place of business] is at [-] ("TRANSFEROR"); and

(2)   [                  ] (Company Registration Number [_____________________])
      whose registered office is at [                  ] ("TRANSFEREE")

(3)   [RELEVANT GLOBAL VOICE GROUP COMPANY] [under number - ] whose [registered
      office/principal place of business] is at [-]("GV").

RECITALS

(A)   The Transferor has agreed to assign, transfer lease, licence the use of or
      otherwise create rights or interests in certain assets and associated
      agreements to and in favour of the Transferee.

(B)   The Transferee acknowledges that such assets are located in premises or
      facilities owned or leased by GV and GV may have telecommunications
      infrastructure and equipment located in such facilities or premises.

(C)   The Transferor is required to ensure that the Transferee shall enter into
      a deed of covenant with the Transferor and GV and the Transferee has
      agreed to enter into this Deed accordingly.

OPERATIVE PROVISIONS:

1.    DEFINITIONS

1.1   In this Deed, the definitions in the Schedules to this Deed shall apply,
      and in addition the following words and expressions shall have the meaning
      set opposite:

      "ASSETS"                          the physical assets listed in Schedule
                                        One to this Deed;

      "BUSINESS DAY"                    all days excluding Saturdays and Sundays
                                        and any day on which either the London
                                        Stock Exchange is closed for the
                                        transaction of business;

      "GV NETWORK"                      the meaning in the Master Agreement; and

      "GV SITE(s)"                      premises occupied or used by GV Group
                                        Companies being the GV Off-Net Buildings
                                        and the GV-On-Net Buildings (as defined
                                        in the

<PAGE>

                                        Master Agreement);

      "MASTER AGREEMENT"                the agreement with the title Master
                                        Network Lease and Sale Agreement made
                                        between Viatel Holding (Bermuda)
                                        Limited, VTL-TP (Bermuda) Limited and
                                        Global Voice Group Limited and dated 15
                                        June 2006;

      "NETWORK OPERATIONAL AGREEMENT"   the agreement with that title made
                                        between Viatel Holding (Bermuda) Limited
                                        and Global Voice Group Limited and dated
                                        15 June 2006;

      "SUBJECT AGREEMENT"                [INSERT TITLE OF RELEVANT SUBJECT
                                        AGREEMENT];

1.2   References in this Deed to the Transferor and GV shall include their
      respective successors in title.

2.    TRANSFEREE'S COVENANTS

      The Transferee covenants and undertakes with the Transferor and GV that it
      shall:

2.1   observe and perform the covenants, undertakings and obligations expressed
      to be observed and performed on the part of the Transferor in the Subject
      Agreement;

2.2   observe and perform all standard access rules and procedures stipulated by
      GV and/or applicable to GV Sites and to which the Transferor wishes to
      grant the Transferee rights of access;

2.3   observe and perform the Covenants contained in Schedule Two to this Deed;

2.4   comply with the Interconnection and Access Procedures contained in
      Schedule Three to this Deed;

2.5   not dispose of the Assets or any part to any person, firm or company
      ("THIRD PARTY") without first ensuring that such third party has executed
      a deed directly with the Transferor and GV containing an obligation on
      such third party's part to observe and perform the covenants and comply
      with the procedures set out in the Schedules this Deed.

3.    CONTRACTS (RIGHTS OF THIRD PARTIES) ACT 1999

      Unless otherwise expressly stated, nothing in this Deed shall create or
      confer any rights or other benefits pursuant to the Contracts (Rights of
      Third Parties) Act 1999 in favour of any person other than the parties to
      this Deed.

DELIVERED as a Deed on the date stated above.

<PAGE>

SIGNED as a DEED by                     )

[NAME OF TRANSFEREE] acting by two/a    )

director[s] [and its secretary]         )

                                        Director

                                        Director/Secretary

<PAGE>

                                  SCHEDULE ONE

                                    [ASSETS]

<PAGE>

                                  SCHEDULE TWO

                                    COVENANTS

The Transferee covenants with the parties as follows:

1.    To keep its equipment and/or infrastructure which is situated on any land
      or property of any other(s) or other person(s) ("LANDOWNER") having
      rights, at any given time, in any part of the land on which the GV Network
      is located (all of which shall, for the purposes of this Schedule Two, be
      together referred to as the "TRANSFEREE'S COMMUNICATIONS INFRASTRUCTURE")
      in good and substantial repair and condition it being agreed that the
      provisions of this paragraph 1 shall not apply to the Transferee to the
      extent that either one of the parties to this Deed is responsible for
      maintaining any of the Transferor 's Communications Infrastructure.

2.    In the course of carrying out any works on any Landowner's land or
      property in respect of the installation, alteration or maintenance of any
      of the Transferee's Communications Infrastructure, to use all reasonable
      endeavours to avoid any physical damage to any part of the Landowner's
      land or property and, in the event that any damage is so caused, the
      Transferee shall as soon as is practicable after such damage has occurred
      carry out or cause to be carried out at its own expense any such repair
      works as are necessary so that the Landowner's land or property so damaged
      is restored to the condition it was in prior to such damage occurring.

3.    Not to do anything which is or may become a nuisance or annoyance to any
      party to this Deed, any Landowner or any owner or occupier of neighbouring
      or adjoining property, or which may cause damage to the land or property
      of any Landowner or to any neighbouring or adjoining property including
      damage attributable to the neglect, default or carelessness of Transferee
      and/or its employees, agents, visitors, sub-tenants, contractors or
      licensees.

4.    To observe and comply with the provisions and requirements of all
      legislation (including, but without limitation, any and all health and
      safety legislation) whether public or local directly affecting the
      Transferee's Communications Infrastructure and/or the GV Network or the
      use of the same, including without limitation planning and
      telecommunications legislation, and not to do or omit anything affecting
      the land or property of any Landowner which is in breach of such
      legislation but to do and provide everything required to be done or
      required by such legislation and to indemnify GV against all proceedings,
      penalties, costs or claims in respect of any acts or omissions in breach
      of such legislation.

5.    That if the Transferee receives notice of any order or proposal under any
      legislation, to give notice thereof to GV immediately and, insofar it
      relates to the Transferee's Communications Infrastructure, if so
      reasonably required by GV, to make or join with GV

<PAGE>

      in making such objections or representations in respect of any order or
      proposal as GV may reasonably require and to comply at its own cost with
      any notice or order relating to GV under any such legislation.

6.    That if GV is required by any governmental or public authority, Landowner
      or other person having the authority so to require, to relocate any
      segment of the GV Network in which is located any Transferee's
      Communications Infrastructure, to give GV all such assistance as GV may
      reasonably require in connection with such relocation works.

7.    Not to use the Transferee's Communications Infrastructure or any part
      thereof nor to permit the same to be used for any illegal or immoral
      purposes nor shall it permit or suffer to be done in or upon the
      Transferee's Communications Infrastructure anything which in the
      reasonable opinion of GV and/or any Landowner may or might become a danger
      or nuisance to GV and/or any Landowner, their licensees, tenants or the
      occupiers of any adjoining or neighbouring property or to the general
      public and, at its own expense, it shall take all reasonable precautions
      as may be necessary for the avoidance thereof.

8.    Not to do or permit to be done during the carrying out of any
      interconnection or other works in connection with the Transferee's
      Communications Infrastructure anything which may cause any interference
      with or obstruct or which may cause delay to traffic on any road forming
      part of any land or property of any Landowner or any injury or damage to
      any other property of the Landowner.

<PAGE>

                                 SCHEDULE THREE

                      INTERCONNECTION AND ACCESS PROCEDURES

A     GENERAL

1.    Each party undertakes that in exercising any right to interconnect their
      respective Networks at a Point of Interconnection, and/or to access, as
      applicable, the GV Chambers for the purpose of inspecting, maintaining
      and/or installing or making alterations to their respective Networks (as
      such rights of access are detailed in the Deed), it shall comply with
      these Joint Interconnection and Access Procedures.

2.    For the purposes of these Joint Interconnection and Access Procedures, the
      following words shall have the following meanings:

      "Allocated Fibres"                shall mean those fibres allocated by
                                        Global Voice to Transferee;

      "Business Hours"                  means the hours from 9am to 5pm (local
                                        time) on any Business Day;

      "Chamber"                         means a GV cable chamber and "Chambers"
                                        shall be construed accordingly;

      "Emergency Interconnection Works" means all interconnection works which
                                        are unscheduled and which are required
                                        solely to restore the provision of
                                        service on the relevant party's Network;

      "Interconnection MOP"             means a method of procedure with respect
                                        to any proposed interconnection works,
                                        in accordance with the pro-forma MOP set
                                        out in Schedule Five, providing full
                                        details as to how the works are to be
                                        carried out;

      "Network"                         means, as the context shall require,
                                        either a telecommunications network
                                        owned and operated by the Transferee or
                                        the GV Network;

      "ODF"                             means an optical distribution frame; and

<PAGE>

      "Point of Interconnection"        means any physical point (being an ODF,
                                        fibre splice or other access point)
                                        where it is technically feasible to
                                        connect the GV Network and the
                                        Transferee's Communications
                                        Infrastructure so as to enable data and
                                        other traffic to pass between the two
                                        Networks; and "Points of
                                        Interconnection" shall be construed
                                        accordingly.

3.    Notwithstanding the provisions set out in these Joint Interconnection and
      Access Procedures, where the GV Network comprises leased or licensed
      assets, namely where the asset is used and enjoyed by GV and/or any of its
      group companies subject to a lease, licence or other agreement with a
      third party, alternative interconnection and access arrangements shall
      apply. GV can make no commitment that any interconnection or access
      arrangements will be possible given the nature of such assets.

B.    ACCESS

4.    All access by Transferee to any site owned by or leased to GV or to a GV
      Facility shall be subject to, respectively, such arrangements as are
      included in the agreement between Transferor and Transferee.

5.    Access by either party to any Chamber on the Network of the other party
      and/or, in the case of GV, to any [Transferee facility], shall be subject
      to the provisions of these Joint Interconnection and Access Procedures.

6.    Each party reserves the right to be present and supervise any access by
      the other to any Chamber on its Network. Any such supervision shall not
      relieve the party being granted access to a Chamber from its obligation to
      comply in full with these Joint Interconnection and Access Procedures.

C.    INTERCONNECTION WORKS -- GENERAL

3.    Each party shall take all necessary precautions (including any required by
      applicable health and safety legislation) to protect the other party's
      property (and/or that of a third party) from any physical damage during
      the course of any interconnection works.

4.    In the event of any damage being caused to the other party's property
      (and/or that of a third party) in carrying out any such works as
      contemplated by these Joint Interconnection and Access Procedures, whether
      to fibre, duct, equipment or to other items, the working party shall make
      good, at its own cost, any such damage so caused.

D     FIBRE INTERCONNECTION AT AN ODF

<PAGE>

1.    Other than in the case of Emergency Works, no less than 2 Business Days'
      notice shall be given of any proposed interconnection at any ODF on the
      Network of the other party, such notice to be accompanied by an
      Interconnection MOP specific to the proposed works. Upon receipt of such
      notice, the Interconnection MOP procedure set out in Section F shall
      apply.

2.    The requirement set out in Section D(1) shall not apply in the case of
      Emergency Works, provided however that as much notice as is reasonably
      possible in the circumstances shall be given (which notice may,
      notwithstanding the provisions of Clause [ ] be verbal and/or email notice
      for these purposes) to the network operations centre ("NOC") of the other
      party. Such notice shall provide as much detail as to the nature of the
      required works as is reasonably practicable in the circumstances. No
      Emergency Works shall be undertaken without the verbal approval being
      given by the relevant NOC. Each party shall procure that their respective
      NOCs respond as expeditiously as possible in the circumstances.

3.    The party carrying out the interconnection works shall be entitled to make
      its Point of Interconnection at the (customer facing) ports for its
      Allocated Fibres (or any part thereof) on the opposite side of the ODF to
      that of the other party.

4.    The party carrying out the interconnection works shall be responsible for
      the cost of any internal patch cabling (including the provision of
      suitable connectors) required to provide an interconnect with the other
      party's ODF, including, where the fibres have not been connected by the
      other party to its side of the ODF, the costs of any required pigtails or
      other patch cords required to do so.

5.    Connectors shall all be of the type SC-UPC other than where, in the
      applicable fibre specification, that specification states otherwise.

6.    In accessing the ODF, whether for the purposes of implementing a Point of
      Interconnection or otherwise, the party carrying out the interconnection
      works shall comply with the applicable access procedures of the other for
      the site in which such ODF is located, such access procedures in any event
      to be reasonable and of a nature standard within the telecommunications
      industry. In the case of a GV ODF, such access shall be made, in the case
      of a GV Site, in accordance with the GV Site Access Procedures and in the
      case of a GV Facility, in accordance with the GV Facility Access
      Procedures.

E     FIBRE INTERCONNECT/CIVIL WORKS AT A CHAMBER

1.    Subject to Section E(2) below, each party shall be responsible for
      performing (at its own cost) all excavation, digging and construction
      works (together "CIVIL WORKS"), as well as all cabling, splicing and/or
      testing works required in order to implement a Point of Interconnection
      between its own Network and that of GV. Any such works shall, without
      prejudice to and notwithstanding the terms and conditions set out in this
      Schedule, be carried out in accordance with standard industry practice for
      such works and with due

<PAGE>

      regard to the nature of the particular Chamber in question and in
      accordance with the practice of a competent provider of such services.

2.    All Civil Works to be carried out within a Chamber shall be carried out
      either by and/or under the direct supervision of the owner of such
      Chamber, any reasonable costs associated with such works and/or
      supervision which are incurred by that owner being reimbursed to it in
      accordance with the provisions of Section H.

3.    Subject to Sections E(5) and F below, the party proposing to carry out any
      such Civil Works at or within the Chamber of the other shall provide to
      the other an Interconnection MOP in all cases where such works: (i)
      include any duct and/or fibre interconnection works (including any related
      cabling, splicing and/or testing works) at a Chamber; or (ii) will
      necessitate the opening of any Chamber for the purpose of installing new
      fibre optic cable. Upon receipt of such Interconnection MOP, the
      Interconnection MOP procedure set out in Section F shall apply.

4.    The Interconnection MOP having been agreed by the parties in accordance
      with Section F, at least 15 Business Days' notice (or such a shorter
      period as is agreed by the parties) must be given of any intention to
      understate the relevant Civil Works.

5.    The notice requirements set out above shall not apply in the case of
      Emergency Works provided however that as much notice as is reasonably
      practicable in the circumstances shall be given to the other party, (which
      notice may, notwithstanding the provisions of Clause [ ]) be verbal and/or
      e-mail notice for these purposes) to the NOC of the other party. Such
      notice shall provide as much detail as to the nature of the required works
      as is reasonably practicable in the circumstances. No Emergency Works
      shall be undertaken without the verbal approval being given by the
      relevant NOC. Each party shall procure that their respective NOCs respond
      as expeditiously as possible in the circumstances. Approval shall only be
      given in relation to access to the relevant Chamber: access to the splice
      closures (and any related work thereon) within such Chamber being only
      available to the owner of such Chamber.

F     INTERCONNECTION MOP PROCEDURE

1.    Upon receipt of the Interconnection MOP, the receiving party may require,
      acting reasonably, that all or any part of the planned works should not be
      carried out where it believes that such works will constitute a breach of
      health and safety legislation and/or where any such works might breach any
      obligations owed to a Landowner or adversely impact the services,
      equipment and/or network of itself and/or of any third party. In such an
      event, the two parties shall use all reasonable endeavours to agree a new
      method of working which accommodates and addresses the technical
      requirements and concerns of both. In default of an agreement as to a
      revised method of working, the matter will be referred to the CHIEF
      TECHNICAL OFFICER for GV and for Transferee.

2.    In the event that the party on whom the Interconnection MOP has been
      served has not within: (i) 2 Business Days, in the case of fibre
      interconnection at an ODF; or (ii) 5

<PAGE>

      Business Days, in the case of Civil Works at a Chamber, notified the other
      party that it will require changes to the Interconnection MOP, then the
      Interconnection MOP shall be deemed approved.

3.    Approval of the MOP, whether deemed or otherwise, shall not in any way
      operate so as to limit the submitting party's liability under the terms
      and conditions of this Deed and it shall be the submitting party's
      responsibility to comply fully with such terms and conditions at all
      times.

G     COMPLETION PROCEDURE

      Following completion of any works as contemplated by this Deed, the party
      carrying out any such works shall provide, at its own cost, the other with
      appropriate documentation sufficient to allow that other to comply, on a
      timely basis, with any obligations it may have (if any) under the New
      Roads and Street Works Act 1991 (or any similar or analogous legislation
      in any other country in which such works may be carried out) in relation
      to the works carried out upon or in relation to its Network.

H     COSTS

      Where the provisions of this Schedule state that costs of one party are to
      be borne by the other party, reference to costs shall be deemed to mean
      the reasonable costs incurred (the party having incurred such costs having
      used reasonably endeavours to minimise the same) plus an administrative
      charge of 15% (exclusive of VAT).

<PAGE>

                                   APPENDIX A

                               VIATEL NETWORK MAP

<PAGE>

                                   APPENDIX B

                            GLOBAL VOICE NETWORK MAP

<PAGE>

SIGNED by                               )
a duly authorised signatory of          ) /s/ Lucy Woods
VIATEL HOLDING (BERMUDA) LIMITED        )

<PAGE>

SIGNED by                               )
a duly authorised signatory of          ) /s/ Lucy Woods
VTL - TP (BERMUDA) LIMITED              )

<PAGE>

SIGNED by                               )
a duly authorised signatory of          ) /s/ Brenda O'Keefe
GLOBAL VOICE GROUP LIMITED              )<PAGE>

                                                                    Exhibit 4.15

                                                   15 June 2006

NETWORK OPERATIONAL AGREEMENT BETWEEN

(1) VIATEL HOLDING (BERMUDA) LIMITED AND

(2) GLOBAL VOICE GROUP LIMITED

<PAGE>

Contents

<TABLE>
<CAPTION>
CLAUSE                                                                                                  PAGE

<S>                                                                                                     <C>
1.    DEFINITIONS AND INTERPRETATION ..............................................................       1

2.    INTERCONNECTION .............................................................................       5

3.    ACCESS POINTS; BREAKOUT; COVENANTs ..........................................................       6

4.    CORE OPERATIONAL SERVICES, POWER AND COOLING AND ADDITIONAL SERVICES ........................       7

5.    OPERATIONS COMMITTEE ........................................................................       9

6.    LIMITATION OF LIABILITY .....................................................................      10

7.    DISPUTE RESOLUTION ..........................................................................      10

8.    DURATION AND TERMINATION ....................................................................      11

9.    CONSEQUENCES OF TERMINATION .................................................................      11

10.   ALIENATION ..................................................................................      11

11.   CONFIDENTIALITY .............................................................................      12

12.   FORCE MAJEURE ...............................................................................      13

13.   NOTICES .....................................................................................      13

14.   SEVERANCE ...................................................................................      15

15.   GENERAL .....................................................................................      15

16.   GOVERNING LAW AND JURISDICTION ..............................................................      17

SCHEDULE 1
      Viatel Facility Access Procedures ...........................................................      18

SCHEDULE 2
      Joint Interconnection and Access Procedures .................................................      31

SCHEDULE 3
      Covenants ...................................................................................      44

Schedule 4
      GV Core Operational Service .................................................................      48

Schedule 5
      Viatel Core Operational Services ............................................................      49

Schedule 6
      Operations Committee ........................................................................      51
      Part I - Specific Terms of Reference ........................................................      51
      Part II - Initial Composition ...............................................................      52
</TABLE>

<PAGE>

THIS NETWORK OPERATIONAL AGREEMENT (this "AGREEMENT") is made the 15 day of June
2006

BETWEEN:

(1)   VIATEL HOLDING (BERMUDA) LIMITED (registered in Bermuda under number
      31325) whose registered office is at Cannons Court, 22 Victoria Street,
      Hamilton HM 12, Bermuda ("VIATEL"); and

(2)   GLOBAL VOICE GROUP LIMITED registered as a public limited liability
      company in Singapore under number 199905625E whose registered
      office/principal place of business is at 80 Raffles Place, #31-20 UOB
      Plaza 2, Singapore 048624 ("GLOBAL VOICE").

INTRODUCTION

(A)   Viatel and Global Voice have, together with VTL-TP (Bermuda) Limited,
      today entered into a Master Network Lease and Sale Agreement (the "MASTER
      AGREEMENT").

(B)   The Master Agreement provides, amongst other things, for the grant to
      Global Voice (and/or relevant Global Voice group companies) of ownership
      and other interest rights in effectively one half of certain of the
      pan-European network assets operated by the Viatel group of companies, and
      for the grant to Viatel group companies of ownership rights in fibre pairs
      in the metropolitan networks owned and operated by the Global Voice group
      of companies.

(C)   The parties now wish to enter into this Agreement in order to set out the
      terms upon which they will together operate and interconnect their
      respective networks.

NOW, THEREFORE in consideration of the mutual promises set forth below, and for
other good and valuable consideration, the receipt and sufficiency of which is
acknowledged, it is agreed as follows:

1.    DEFINITIONS AND INTERPRETATION

1.1   In this Agreement (except where the context otherwise requires) the
      following words shall have the following meanings:

      "ACCESS PROCEDURES"          means, as the context shall require, any of
                                   the Joint Interconnection and Access
                                   Procedure, the Viatel Facility Access
                                   Procedure and any access procedures included
                                   within any Licence Agreement or Site Lease
                                   Agreement;

      "ADDITIONAL OPERATIONAL      means such installation, maintenance,
      SERVICES"                    monitoring and ther services which are
                                   additional to the Core Operational Services
                                   and which either party may agree to provide
                                   to the other in accordance with Clause 4.7;

                                       1
<PAGE>

      "ARBITRATION AGREEMENT"      means the agreement with that title entered
                                   into on the same date hereof by the relevant
                                   parties, in the agreed terms;

      "BUSINESS DAY"               means all days excluding Saturdays and
                                   Sundays and any day on which the London
                                   Stock Exchange is closed for the transaction
                                   of business;

      "CORE OPERATIONAL SERVICES"  means, as the context shall require, either
                                   the GV Core Operational Services or the
                                   Viatel Core Operational Services;

      "DEED OF COVENANT"           has the meaning given to it in the Master
                                   Agreement;

      "GLOBAL VOICE GROUP"         means Global Voice and each subsidiary
                                   (whether direct or indirect) of Global Voice;

      "GLOBAL VOICE GROUP          means the companies which are members of the
      COMPANIES"                   Global Voice Group; and "Global Voice
                                   Company" shall be construed accordingly;

      "GOVERNMENTAL AUTHORITY"     means any national, federal,state, regional,
                                   municipal or local authority including any
                                   regulatory body or agency deriving authority
                                   from any of the foregoing and including any
                                   public utilities;

      "GV CHAMBERS"                means all splice chambers, handholes and
                                   other forms of enclosure now or, in the case
                                   of the GV Network in London alone,
                                   subsequently installed on the GV Network
                                   that provide access to the GV Transferred
                                   Assets;

      "GV CORE                     means the standard services provided by
      OPERATIONAL SERVICES"        Global Voice with respect to the maintenance
                                   and general operation of the GV Network, and
                                   as the same are first referred to in Clause
                                   4.1;

      "GV FACILITY"                means a telecommunications facility on the
                                   GV Network used for the purpose of housing
                                   telecommunications equipment, and at which
                                   it is possible to interconnect, at a Global
                                   Voice ODF, telecommunications networks to
                                   any of the fibres comprised in the GV
                                   Transferred Assets;

                                       2
<PAGE>

      "GV NETWORK"                 has the meaning given to it in the Master
                                   Agreement;

      "GV TRANSFERRED ASSETS"      means the fibre on the GV Network in which
                                   title (or such other equivalent of full
                                   ownership as is allowed to be conveyed under
                                   applicable law) is to be transferred to a
                                   Viatel Group Company pursuant to the Master
                                   Agreement;

      "JOINT INTERCONNECTION       means the procedures agreed between the
      AND ACCESS PROCEDURES"       parties as being applicable to any works to
                                   interconnect telecommunication networks with
                                   the GV Network and/or the Viatel Network
                                   and/or to access the GV Chambers, a GV
                                   Facility or, as the case may be, the Viatel
                                   Chambers, and as the same are first referred
                                   to in Clause 2.3;

      "LANDOWNER"                  means the owner(s) or other person(s) having
                                   rights, at any given time, in any part of
                                   the land adjoining and/or on which the
                                   Networks are located;

      "LICENCE AGREEMENT"          has the meaning given to it in the Master
                                   Agreement;

      "NETWORK"                    means, as the context shall require, either
                                   the GV Network or the Viatel Network;

      "ODF"                        means an optical distribution frame;

      "OPERATING CHARGES"          has the meaning given to it in the Master
                                   Agreement;

      "OPERATIONS COMMITTEE"       means the committee established by the
                                   parties pursuant to Clause 5.1;

      "POINT OF INTERCONNECTION"   means any physical point (being an ODF, fibre
                                   splice or other access point) where it is
                                   technically feasible to interconnect the
                                   Viatel Network or, as the case may be, the
                                   GV Network with any other telecommunications
                                   network so as to enable data and other
                                   traffic to pass between such networks; and
                                   "Points of Interconnection" shall be
                                   construed accordingly;

      "SERVICE REQUEST"            has the meaning given to it in Clause 4.7;

      "SITE LEASE AGREEMENT"       has the meaning given to it in the Master
                                   Agreement;

                                       3
<PAGE>

      "TERM"                       means the term of this Agreement as provided
                                   for in Clause 8.1;

      "VIATEL CHAMBERS"            means all splice chambers, handholes and
                                   other forms of enclosure now installed on
                                   the Viatel Network (other than Viatel Sites
                                   or Viatel Facilities) that provide access to
                                   the Viatel Transferred Assets;

      "VIATEL CORE OPERATIONAL     means the standard services provided by
       SERVICES"                   Viatel with respect to the maintenance and
                                   general operation of the Viatel Network, and
                                   as the same are first referred to in Clause
                                   4.2;

      "VIATEL FACILITY"            means a telecommunications facility on the
                                   Viatel network used for the purpose of
                                   housing telecommunications equipment, as
                                   each such facility is identified in the
                                   Viatel Facility Access Procedures;

      "VIATEL FACILITY ACCESS      means the procedures agreed between the
      PROCEDURES"                  parties as being applicable to any access by
                                   Global Voice to any Viatel Facility, and as
                                   the same are first referred to in Clause
                                   2.3;

      "VIATEL GROUP"               means Viatel and each subsidiary (whether
                                   direct or indirect) of Viatel;

      "VIATEL GROUP COMPANIES"     means the companies which are members of
                                   the Viatel Group; and "Viatel Group Company"
                                   shall be construed accordingly;

      "VIATEL NETWORK"             has the meaning given to it in the Master
                                   Agreement;

      "VIATEL SITE"                has the meaning given to it in the Master
                                   Agreement; and

      "VIATEL TRANSFERRED          means such assets in which ownership and
       ASSETS"                     other rights or interest (including title or
                                   such other equivalent of full ownership as
                                   is allowed to be conveyed under applicable
                                   law) are to be transferred to Global Voice
                                   in accordance with the Master Agreement.

1.2   In this Agreement (except where the context otherwise requires):

      1.2.1 any reference to a Clause or Schedule is to the relevant Clause or
            Schedule of, or to, this Agreement;

                                       4
<PAGE>

      1.2.2 the Clause headings are included for convenience only and shall not
            affect the interpretation of this Agreement;

      1.2.3 use of the singular includes the plural and vice versa;

      1.2.4 any reference to "persons" includes individuals, firms,
            partnerships, companies, corporations, associations, organisations,
            foundations and trusts (in each case whether or not having separate
            legal personality);

      1.2.5 save in the case of Clause 3.4, a reference to "writing" or
            "written" does not include e-mail;

      1.2.6 the words "subsidiary" and "holding company" have the meanings given
            to them by section 736 of the UK Companies Act 1985;

      1.2.7 a reference to a statute or statutory provision, code or guidance
            ("LEGISLATION") is a reference to such legislation as the same may
            from time to time be amended, redefined, extended, varied,
            superseded, replaced substituted or consolidated;

      1.2.8 any phrase introduced by the terms "including", "include", "in
            particular" or any similar expression shall be construed as
            illustrative and shall not limit the sense of the words preceding
            those terms;

      1.2.9 the expression "in the agreed terms" means terms approved by the
            relevant parties and initialled by them on the date hereof for the
            purpose of identification; and

      1.2.10 any reference in this Agreement to either party procuring any
            action shall be construed as referring to that party procuring that
            the relevant action be taken by its subsidiary or subsidiaries which
            have the necessary rights and powers to discharge the obligation;
            where so indicated in the text, such action shall be through entry
            by the relevant subsidiary into an agreement or other instrument
            valid and effective under the laws of the relevant jurisdiction.

1.3   The Schedules form part of this Agreement and shall have effect as if set
      out in full in the body of this Agreement and any reference to this
      Agreement shall include the Schedules.

2.    INTERCONNECTION

2.1   Subject to Clause 2.3, Viatel shall have access to the GV Network for the
      purposes of interconnecting any telecommunications network to any of the
      fibres comprised in the GV Transferred Assets.

                                       5
<PAGE>

2.2   Subject to Clauses 2.3 and 2.4, Global Voice shall have access to the
      Viatel Network for the purposes of interconnecting any telecommunications
      network to any of the fibres comprised in the Viatel Transferred Assets.

2.3   Each of Global Voice and Viatel agrees that in exercising its respective
      rights under, as applicable, Clause 2.1 or 2.2, it shall at all times
      comply with the Joint Interconnection and Access Procedures set out in
      Schedule 1.

2.4   In addition to its obligations under Clause 2.3, when exercising its
      rights under Clause 2.2, Global Voice shall:

      2.4.1 where accessing a Viatel Site, comply with the applicable Licence
            Agreement or Site Lease Agreement; and

      2.4.2 where accessing a Viatel Facility, comply with the Viatel Facility
            Access Procedures as set out in Schedule 2.

2.5   Unless otherwise agreed in writing or provided for under, as applicable,
      the Global Voice Core Operational Services, the Viatel Core Operational
      Services or any of the Access Procedures, each party shall, at its own
      cost, be responsible for providing, installing, testing and making
      operational all equipment on its side of each Point of Interconnection,
      and in so doing shall apply the standards of a competent provider of
      electronic communications services.

3.    ACCESS POINTS; BREAKOUT; COVENANTS

3.1   Global Voice shall, subject to compliance with Clause 3.2, be entitled to
      have access to the Viatel Network for the purpose of inspecting and (where
      Viatel is in default of its maintenance obligations as provided under the
      Viatel Core Operational Services) maintaining the Viatel Transferred
      Assets and/or for installing new equipment or telecommunications
      infrastructure in any ducts or related infrastructure that comprise part
      of the Viatel Transferred Assets.

3.2   In exercising its rights under Clause 3.1, Global Voice shall:

      3.2.1 where accessing a Viatel Site, comply with the applicable Licence
            Agreement or Site Lease Agreement;

      3.2.2 where accessing a Viatel Facility, comply with the Viatel Facility
            Access Procedures; and

      3.2.3 where accessing a Viatel Chamber, comply with the Joint
            Interconnection and Access Procedures.

                                       6
<PAGE>

3.3   Viatel shall, subject to compliance with the Joint Interconnection and
      Access Procedures, be entitled to have access to the GV Chambers and the
      GV Facilities for the purpose of inspecting and (where Global Voice is in
      default of its maintenance obligations as provided under the GV Core
      Operational Services) maintaining the Global Voice Transferred Assets.

3.4   Both Global Voice and Viatel shall, with the prior written approval of the
      other, be entitled to breakout from any Point of Interconnection on the
      Network of the other for the purpose of connecting to any other point on
      their own Network and/or the network of another carrier or operator and/or
      to the premises of a customer or a telehouse or similar shared co-location
      facility. Such approval shall not be unreasonably delayed or conditioned
      and, in any event, may only be withheld where: (i) it can be reasonably
      shown that for technical reasons any such proposed breakout could
      materially and adversely affect the withholding party's use and operation
      of its Network; and/or (ii) the proposed breakout is prohibited by, or
      contrary to, any restrictions set out in any agreement in force at the
      relevant time between the withholding party and any third party; and/or
      (iii) despite using reasonable endeavours, the required consent of any
      Landowner or other third party cannot be obtained or can only be obtained
      on terms or conditions that are materially adverse to the withholding
      party. For the avoidance of doubt, any works which involve the carrying
      out of any civil or fibre works in a GV Chamber or a Viatel Chamber shall
      be carried out in accordance with the provisions of Section E of Schedule
      2.

3.5   Each of Global Voice and Viatel covenant with the other to observe and
      fulfil such covenants as are applicable to them and as are set out in
      Schedule 3.

4.    CORE OPERATIONAL SERVICES, POWER AND COOLING AND ADDITIONAL SERVICES

4.1   In consideration for Viatel agreeing to pay, in accordance with the terms
      of the Master Agreement, its pro-rata share of the maintenance costs
      associated with the GV Transferred Assets, and subject to Viatel having
      paid from time to time all such charges as are then due, Global Voice
      shall provide to Viatel the GV Core Operational Services. The GV Core
      Operational Services shall comprise in each relevant territory the
      maintenance repair and other services set out in the applicable operating
      manual set out in Schedule 4.

4.2   In consideration for Global Voice agreeing to pay, in accordance with the
      terms of the Master Agreement, the Operating Charges and such costs and
      expenses as are referred to in Clause 9.6 of the Master Agreement, and
      subject to Global Voice having paid from time to time all such Operating
      Charges and costs and expenses as aforesaid as are then due, Viatel shall
      provide to Global Voice the Viatel Core Operational Services as the same
      are described in Schedule 5.

                                       7
<PAGE>

4.3   In the event of any cut and/or fibre break on any of the submarine cable
      crossings on the Viatel Network, Viatel shall promptly undertake, in
      accordance with the provisions of the then applicable third party repair
      and/or maintenance agreement, to arrange for the repair of such cut and/or
      fibre break. The parties shall share equally in the direct costs
      associated with any such repairs.

4.4   Subject to Clause 4.5, prior to the installation of any power-drawing
      equipment by Viatel and/or by Global Voice at a Viatel Site in accordance
      with the Site Lease or the Licence Agreement for such site (as the case
      may be), a power audit will be carried out by the installing party at that
      site to determine the balance and allocation of the then remaining power
      and cooling capacity. The parties agree and acknowledge that it is their
      intention that the balance of such then remaining availability and
      capacity be divided equally between the parties. The precise methodology
      for the carrying out of such an audit and the dividing of the resulting
      balance will be discussed and agreed at the first meeting of the
      Operations Committee.

4.5   It is agreed that with respect to the Viatel Sites at each of Egham,
      Telehouse (London) and Halfweg (Amsterdam), the allocation of the
      available power and cooling capacity shall be discussed and agreed at the
      first meeting of the Operations Committee.

4.6   Prior to installation of any Global Voice Equipment in accordance with
      Clause 4 of the Licence Agreement and/or the Site Lease (as the case may
      be) in relation to any of the Viatel Sites at: (a) La Defense, Paris,
      France; (b) 2nd floor 35 rue des Jeuneurs, Paris, France; (c) Mannheim,
      Germany; and (d) Dusseldorf, Germany, Global Voice shall, notwithstanding
      any other provision of any of the Transaction Documents, give to Viatel at
      least 30 days' notice of its intention to do so. During such 30 day notice
      period, Viatel shall remove all equipment which is, at the date of the
      notice, located within the Licensed Space and/or area demised by the
      relevant Site Lease (as the case may be) at the site the subject of the
      notice and shall notify Global Voice when the removal exercise has been
      completed at, such removal, in any event, to have been completed by the
      expiry of the 30 day notice period provided however that, if any such
      equipment is carrying live traffic, whether that of Viatel, a Viatel Group
      Company and/or of any of its customers, Viatel shall have a further 30
      days in which to complete the removal of such traffic-bearing equipment.

4.7   Either party may submit a service request ("SERVICE REQUEST") for
      Additional Operational Services. The Service request shall provide such
      full and comprehensive details of the service requested (including, as
      applicable, full termination details (physical coordinates and termination
      types) and time-periods within which it is requested that services are to
      be performed) as are sufficient to enable the other party (the
      "RECIPIENT") to quote appropriately for the services. Within ten (10)
      Business Days of receipt of the Service Request the recipient shall notify
      the other party whether it is willing to provide the requested Additional
      Operational Services and, if applicable, the charges and terms and
      conditions of supply of the relevant Additional Operational Services
      (including payment

                                       8
<PAGE>

      terms and service level agreements). If after receipt of such notification
      the requesting party wishes to proceed with such Additional Operational
      Services, it shall provide written confirmation to the recipient as to its
      request for such Additional Operational Services at the quoted charges and
      terms and conditions of supply. If no such confirmation is received by the
      recipient within ten (10) Business Days of its notification to the other,
      the offer made in the notification shall lapse and be incapable of
      acceptance thereafter.

4.8   In relation to its provision of, as applicable, the GV Core Operational
      Services, the Viatel Core Operational Services and any Additional
      Operational Services, each party will appoint a representative to deal
      with any technical or other queries raised by the other. Access to such
      representative will be made available on a timely basis and each party
      will ensure that a response to any such query raised by the other party is
      received from the representative as soon as is reasonably practicable and,
      wherever reasonably possible, within one Business Day of such query being
      raised. The response shall include such information and assistance as the
      other party may reasonably require.

4.9   Each party shall provide and perform the Core Operational Services and any
      Additional Operational Services with reasonable care and skill and in
      accordance with good telecommunications industry practice.

4.10  Save as set out in this Agreement and/or in the GV Core Operational
      Services and/or the Viatel Core Operational Services, it shall be the
      responsibility of each party to maintain and operate their respective
      equipment and infrastructures and in so doing shall apply the standards of
      a competent provider of electronic communications services.

5.    OPERATIONS COMMITTEE

5.1   The parties shall, as soon as is reasonably practicable after the date
      hereof, establish the Operations Committee whose general purpose shall be
      facilitating the operation of the Networks in accordance with the terms of
      this Agreement, and, more specifically, which shall have the terms of
      reference set out in Part I of Schedule 6.

5.2   Each party shall appoint two (2) representatives to attend and vote at
      meetings of the Operations Committee. Such representative shall be counted
      for the purpose of determining whether a quorum is present and shall have
      one vote on any matter requiring a decision. Each party shall be entitled
      to change that representative at any time by written notice to the other.
      The initial members of the Operations Committee shall be as set out in
      Part II of Schedule 6.

5.3   Meetings of the Operations Committee shall take place no fewer than once
      per calendar month or at such times as may be agreed by the parties. Any
      party may propose agenda items for consideration at a meeting of the
      Operations Committee provided that such items are notified to the other
      party at least five (5) Business Days in advance of a proposed meeting.

                                       9
<PAGE>

5.4   A quorum for a meeting of the Operations Committee shall only be present
      when at least one representative of each party is present. The Chief
      Technical Officer for Viatel (or his appointed representative) shall act
      as Chairman of all meetings.

5.5   All decisions at meetings of the Operations Committee shall require a
      majority vote of the representatives entitled to attend and vote; the
      Chairman will not have a casting vote.

5.6   The authorised representative of a party shall (unless specific
      notification to the contrary is given) be authorised to make decisions on
      behalf of that party on all matters connected with the Networks. All
      decisions made at meetings of the Operational Committee in connection with
      the Networks shall be binding on both parties.

6.    LIMITATION OF LIABILITY

6.1   Nothing in this Clause 6 shall limit liability for death or personal
      injury resulting from either party's negligence or for fraud.

6.2   The aggregate liability of either party in respect of any loss or damage
      suffered by the other party and arising out of or in connection with this
      Agreement, whether in contract, tort (including negligence) or for breach
      of statutory duty or in any other way, shall not exceed one million euro
      ((euro)1,000,000) in any 12 month period.

6.3   A party shall not be liable, in contract, tort (including negligence) or
      for breach of statutory duty or in any other way for:

      6.3.1 any loss arising from or in connection with loss of revenues,
            profits, contracts or business or failure to realise anticipated
            savings;

      6.3.2 any loss of goodwill or reputation; or

      6.3.3 any indirect or consequential losses,

      suffered or incurred by the other party arising out of or in connection
      with any matter under this Agreement.

7.    DISPUTE RESOLUTION

7.1   Any dispute between the parties which arises under this Agreement is to be
      resolved in accordance with the provisions of this Clause 7. Each party
      will continue to fulfil its obligations under this Agreement during the
      pendency of any dispute.

7.2   A party claiming that a dispute has arisen (the "DISPUTING PARTY") will
      give notice to the other party specifying the nature of the dispute and
      the facts giving rise to the dispute. Within ten (10) Business Days of the
      date of notice given by the Disputing Party, the

                                       10
<PAGE>

      parties' respective Chief Technical Officers will negotiate and use all
      reasonable endeavours to resolve the dispute.

7.3   If the notified dispute has not been resolved after a period of not less
      than twenty (20) Business Days from receipt of the notice from the
      Disputing Party, then the parties' respective Chief Executive Officers
      will negotiate and use all reasonable endeavours to resolve the dispute.

7.4   If the notified dispute has not been resolved after a period of not less
      that thirty (30) Business Days from receipt of the notice from the
      Disputing Party (or such further period as the parties agree to), then the
      parties shall, but not until such time, be entitled to bring a formal
      claim or other legal proceedings in respect of such dispute.

8.    DURATION AND TERMINATION

      This Agreement shall come into force on the date of this Agreement and
      shall terminate concurrently with the termination of the Master Agreement.

9.    CONSEQUENCES OF TERMINATION

      The parties shall have no further obligations or rights under this
      Agreement after the end of the Term, without prejudice to any obligations
      or rights which have accrued to either party at the time when the Term
      ends save that Clauses 6, 7, 10, 11, 13, 16 and this Clause 9, together
      with those other Clauses the survival of which is necessary for the
      interpretation or enforcement of this Agreement, shall continue to have
      effect after the end of the Term.

10.   ALIENATION

10.1  Subject to Clauses 10.2, 10.3 and 10.4, and/or as otherwise provided in
      this Agreement, no party shall without the prior written consent (such
      consent not to be unreasonably withheld or delayed) of the other party
      assign or transfer at law, sub-license or deal in any other manner with
      this Agreement or any rights under this Agreement, or sub-contract any or
      all of its obligations under this Agreement or purport to do any of the
      same. Any purported assignment or other dealing in breach of this Clause
      shall confer no rights on the purported assignee.

10.2  Either party shall, without releasing it in any way whatsoever from any of
      its obligations hereunder, be entitled to sub-contract to a third party
      the performance of, as applicable, the GV Core Operational Services, the
      Viatel Core Operational Services and any Additional Operational Services.

10.3  Each party agrees that the other may, with respect to any particular
      jurisdiction, designate, from time to time, any, as appropriate, Viatel
      Group Company or Global Voice Group Company to be the beneficiary of any
      of the rights granted under Clauses 2 and 3

                                       11
<PAGE>

      as if it were a party to this Agreement. Each party agrees that it shall
      procure that any such Viatel Group Company or Global Voice Group Company
      shall comply with any provisions and/or obligations relating to the grant
      of rights under Clauses 2 and 3 and each party additionally agrees that it
      shall be liable to the other in accordance with the terms of this
      Agreement for any act or omission of any such, as appropriate, Viatel
      Group Company or Global Voice Group Company, where any such act or
      omission may be considered to be a breach of any provision of this
      Agreement.

10.4  Each party agrees that the other may assign, transfer or sub-licence any
      of the rights granted to it (and/or any of such Group Companies as it may
      designate pursuant to Clause 10.3) under this Agreement to any third party
      provided that, as a condition of any such assignment, transfer or
      sub-licence, it shall require the third party to enter into a deed of
      covenant by which such third party agrees to comply with any provisions
      and/or obligations relating to the grant of rights under Clauses 2 and 3
      (including any applicable Access Procedures) and with undertakings in
      favour of the relevant grantor of rights under this Agreement in
      substantially the same terms as the covenants undertaken in favour of such
      grantor by the other party hereto and as the same are set out in Schedule
      3. Global Voice acknowledges that neither Viatel nor any other Viatel
      Group Company shall be under any obligation to provide any service,
      provided for in this Agreement, direct to any such third party unless such
      third party shall have a specific contractual relationship with Viatel.
      Each party further agrees that it shall be liable to the other in
      accordance with the terms of this Agreement for any act or omission of any
      such third party, where any such act or omission may be considered to be a
      breach of this Agreement.

11.   CONFIDENTIALITY

11.1  Each party undertakes that it will not at any time hereafter use, divulge
      or communicate to any person, except to its professional representatives
      or advisers or as may be required by law or any legal or regulatory
      authority, the terms and conditions of this Agreement or any confidential
      information concerning the business or affairs of the other party or of
      any member of the group of companies to which the other party belongs
      which may have or may in the future come to its knowledge and each of the
      parties shall use its reasonable endeavours to prevent the publication or
      disclosure of any confidential information concerning such matters. Any
      request or direction of any legal or regulatory authority to disclose any
      such confidential information shall, unless prevented by applicable law,
      be notified promptly before compliance to the other party who shall be
      given reasonable opportunity to resist. No party shall use any such
      confidential information except for the performance of this Agreement.

11.2  The provisions of Clause 11.1 shall not apply to information which:

      11.2.1 is or becomes generally available to the public otherwise than as a
            direct or indirect result of disclosure by the receiving party or a
            person employed or

                                       12
<PAGE>

            engaged by the receiving party contrary to their respective
            obligations of confidentiality; or

      11.2.2 is or was made available or becomes available to the receiving
            party otherwise than pursuant to this Agreement and free of any
            restrictions as to its use or disclosure

11.3  No party shall make any announcement relating to this Agreement or its
      subject matter without the prior written approval of the other parties
      except as required by law or by any legal or regulatory authority.

12.   FORCE MAJEURE

12.1  In this Agreement, "force majeure" shall mean any cause preventing either
      party from performing any or all of its obligations which arises from or
      is attributable to change or imposition of any law or any governmental
      order, rule, regulation or direction, or nuclear or other accident of any
      kind, acts of God, war or terrorist activity, riot, civil commotion,
      malicious damage, fire, flood or storm.

12.2  If either party is prevented from performance of any of its obligations
      under this Agreement by force majeure, that party shall as soon as
      reasonably possible and in any event within one (1) Business Day after
      commencement of the force majeure serve notice in writing on the other
      party specifying the nature and extent of the circumstances giving rise to
      force majeure, and shall subject to service of such notice have no
      liability in respect of any delay in performance or any non-performance of
      any such obligation save for any payment obligation which shall continue
      in full force and effect (and the time for performance shall be extended
      accordingly) to the extent that the delay or non-performance is due to
      force majeure.

13.   NOTICES

13.1  Any notice given under this Agreement shall be in writing and shall be
      served by hand delivering it or sending it by prepaid recorded or special
      delivery post or prepaid international recorded airmail or fax to the
      address and for the attention of the relevant party set out in Clause 13.2
      (or as otherwise notified by that party hereunder). Any such notice shall
      be deemed to have been received:

      13.1.1 if hand delivered or sent by prepaid recorded or special delivery
            post or prepaid international recorded airmail, at the time of
            delivery;

      13.1.2 in the case of fax, at the time of transmission.

      Provided that if deemed receipt occurs before 9.00 a.m. on a Business Day
      the notice shall be deemed to have been received at 9.00 a.m. on that day,
      and if deemed receipt

                                       13
<PAGE>

      occurs after 5.00 p.m. on a Business Day, or on any day which is not a
      Business Day, the notice shall be deemed to have been received at 9.00
      a.m. on the next Business Day.

13.2  The addresses and fax numbers of the parties for the purposes of Clause
      13.1 are:

      VIATEL HOLDING (BERMUDA) LIMITED

      Address:                     c/o VTL (UK) Limited, Inbucon House, Wick
                                   Road, Egham, Surrey TW20 0HR, England

      For the attention of:        Group General Counsel

      Fax number:                  +(44) 1784 494281

      With a courtesy copy to Olswang, 90 High Holborn, London WC1V 6XX - F.A.O.
      Colin Long

      GLOBAL VOICE GROUP LIMITED

      Address:                     80 Raffles Place, 31-20 VOB Plaza 2,
                                   Singapore 048624

      For the attention of:        Christopher Nightingale

      Fax number:                  + (65) 6538 4058

      With a courtesy copy to Olswang, 90 High Holborn, London WC1V 6XX - F.A.O.
      Michael Brader

      or such other address or fax number as may be notified in writing from
      time to time by the relevant party to the other parties.

13.3  In proving such service it shall be sufficient to prove that the envelope
      containing such notice was addressed to the address of the relevant party
      set out in Clause 13.2 (or as otherwise notified by that party hereunder)
      and delivered either to that address or into the custody of the postal
      authorities as a prepaid recorded or special delivery or international
      recorded airmail letter, or that the notice was transmitted by fax to the
      fax number of the relevant party set out in Clause 13.2 (or as otherwise
      notified by that party hereunder) and that the sender holds a transmission
      report indicating uninterrupted transmission to the relevant party and in
      the case of notice sent by fax to dispatch of the notice by prepaid post
      as provided above on the same day of such transmission (or the next day if
      notice is transmitted outside post office hours).

13.4  For the avoidance of doubt, the parties agree that the provisions of this
      Clause shall not apply in relation to the service of any process in any
      legal action or proceedings arising

                                       14
<PAGE>

      out of or in connection with this Agreement or the legal relationships
      established by this Agreement.

13.5  For the avoidance of doubt, notice given under this Agreement shall not be
      validly served if sent by email.

14.   SEVERANCE

14.1  If any provision of this Agreement shall be found by any court or
      administrative body of competent jurisdiction to be invalid or
      unenforceable, such invalidity or unenforceability shall not affect the
      other provisions of this Agreement which shall remain in full force and
      effect.

14.2  If any provision of this Agreement is so found to be invalid or
      unenforceable but would be valid or enforceable if some part of the
      provision were deleted, the provision in question shall apply with such
      modification(s) as may be necessary to make it valid.

14.3  The parties agree, in the circumstances referred to in Clause 14.1 and if
      Clause 14.2 does not apply, to attempt in good faith to substitute for any
      invalid or unenforceable provision a valid or enforceable provision which
      achieves to the greatest extent possible the same effect as would have
      been achieved by the invalid or unenforceable provision. The obligations
      of the parties under any invalid or unenforceable provision of this
      Agreement shall be suspended whilst an attempt at such substitution is
      made.

15.   GENERAL

15.1  Nothing in this Agreement is intended to or shall operate to create a
      partnership between the parties or any of them, or to authorise any party
      to act as agent for any other, and no party shall have authority to act in
      the name or on behalf of or otherwise to bind any other in any way or to
      hold itself out in its advertising or otherwise in any manner which would
      indicate or imply any such relationship with the other unless expressly
      provided otherwise in this Agreement.

15.2  No modification or variation of this Agreement (or any document entered
      into pursuant to or in connection with this Agreement) shall be valid
      unless it is in writing and signed by or on behalf of each of the parties
      to this Agreement. For the avoidance of doubt, no modification or
      variation of this Agreement shall be valid if made by email.

15.3  Unless expressly so agreed, no modification or variation of this Agreement
      shall constitute or be construed as a general waiver of any provisions of
      this Agreement, nor shall it affect any rights, obligations or liabilities
      under this Agreement which have already accrued up to the date of such
      modification or waiver, and the rights and obligations of the parties
      under this Agreement shall remain in full force and effect, except and
      only to the extent that they are so modified or varied.

                                       15
<PAGE>

15.4  Except insofar as this Agreement expressly provides that a third party may
      in his own right enforce a term of this Agreement, a person who is not a
      party to this Agreement has no right under the Contracts (Rights of Third
      parties) Act 1999 to rely upon or enforce any term of this Agreement but
      this does not affect any right or remedy of a third party which exists or
      is available apart from that Act.

15.5  Each party shall use all reasonable endeavours to execute or cause to be
      executed all such other documents and do or cause to be done all such
      further acts and things consistent with the terms of this Agreement as the
      other parties may from time to time reasonably require in order to vest in
      and secure to the other parties the full benefit of the assets, rights and
      benefits to be transferred or granted to the other parties under this
      Agreement and otherwise to give full effect to the terms of this
      Agreement.

15.6  In no event will any delay, failure or omission (in whole or in part) in
      enforcing, exercising or pursuing any right, power, privilege, claim or
      remedy conferred by or arising under this Agreement or by law, be deemed
      to be or construed as a waiver of that or any other right, power,
      privilege, claim or remedy in respect of the circumstances in question, or
      operate so as to bar the enforcement of that, or any other right, power,
      privilege, claim or remedy, in any other instance at any time or times
      subsequently.

15.7  The rights and remedies provided by this Agreement are cumulative and
      (unless otherwise provided in this Agreement) do not exclude any other
      rights or remedies available in law.

15.8  This Agreement, and the documents referred to in it, (together the
      "Contractual Document(s)") constitute the entire agreement and
      understanding of the parties relating to the subject matter of the
      Contractual Documents and supersede any previous agreement or
      understanding between the parties (or any of them) in relation to such
      subject matter.

15.9  Each of the parties acknowledges and agrees that in entering into the
      Contractual Documents, it has not relied on any statement, representation,
      warranty, understanding, undertaking, promise or assurance (whether
      negligently or innocently made) of any person (whether party to any
      Contractual Document or not) other than as expressly set out in the
      Contractual Documents. Each party irrevocably and unconditionally waives
      all claims, rights and remedies which but for this Clause it might
      otherwise have had in relation to any of the foregoing.

15.10 No party shall be liable in negligence or other tort for any act or
      omission which (individually or in combination with any other act or
      omission) constitutes a breach of this Agreement.

15.11 Nothing in the Contractual Documents shall limit or exclude any liability
      for fraud.

                                       16
<PAGE>

16.   GOVERNING LAW AND JURISDICTION

16.1  The validity, construction and performance of this Agreement (and any
      claim, dispute or matter arising under or in connection with it or its
      enforceability) (a "DISPUTE") shall be governed by and construed in
      accordance with the laws of England. Any Dispute shall be referred to and
      finally resolved by arbitration pursuant to the Arbitration Agreement.

16.2  The parties shall enter into and execute the Arbitration Agreement on the
      same date as hereof.

16.3  The parties each irrevocably appoint the person specified in Clause 16.4
      as its agent to receive on its behalf in England service of any
      proceedings arising out of or in connection with the validity,
      construction or performance of this Agreement or its enforceability. Such
      service shall be deemed completed on delivery to such agent (whether or
      not it is forwarded to and received by the other party). If for any reason
      a party's agent ceases to be able to act as agent or no longer has an
      address in England, that party shall immediately appoint a substitute
      acceptable to the other party and deliver to that other party the new
      agent's name, address and fax number.

16.4  The persons and their addresses and fax numbers appointed in Clause 16.3
      are:

      VIATEL HOLDING (BERMUDA) LIMITED

      Address:                     Olswang, 90 High Holborn, London WC1V 6XX

      For the attention of:        Colin Long

      Fax number:                  +44 (0) 20 7067 3999

      GLOBAL VOICE GROUP LIMITED

      Address:                     Memery Crystal Solicitors, 44 Southampton
                                   Buildings, London WC2A 1AP

      For the attention of:        Peter Crystal

      Fax number:                  +44 (0)20 7242 2058

                                       17
<PAGE>

                                   SCHEDULE 1

                        VIATEL FACILITY ACCESS PROCEDURES

A     GENERAL

1.    Global Voice undertakes that in exercising any right of access to a Viatel
      Facility, it shall comply with these Viatel Facility Access Procedures.

2.    All access shall be at a relevant Viatel Facility.

3.    Access shall be granted only to persons who are deemed Authorised
      Contractors in accordance with these Viatel Facility Access Procedures
      and/or who are under the supervision of either an Authorised Contractor or
      of Viatel.

4.    For the purposes of these Viatel Facility Access Procedures, the following
      words shall have the following meanings:

      "Authorised                  Contractor" means such contractors, agents,
                                   sub-contractors, sub- licensees (in
                                   accordance with Clause 10.4), employees and
                                   other representatives of Global Voice as are
                                   authorised in accordance with these Viatel
                                   Facility Access Procedures to access any
                                   Viatel Facility;

      "Business Hours"             means the hours from 9am to 5pm (local time)
                                   on any Business Day;

      "Emergency Works"            means all works which are unscheduled and
                                   which are required solely to restore
                                   provision of service on the GV Network to
                                   third parties and/or to make safe any
                                   equipment or apparatus on or connected to
                                   such Network, and for which purpose access
                                   is required to a Viatel Facility in
                                   accordance with the Viatel Facility Access
                                   Procedures;

      "MOP"                        means a method of procedure, with respect to
                                   any proposed works, in accordance with the
                                   pro-forma MOP set out in Appendix 1,
                                   providing full details as to how the works
                                   are to be carried out;

      "Planned Works"              means all works (whether maintenance,
                                   installation or network alterations) which
                                   are scheduled by Global Voice to take place
                                   with respect to its Network assets, and for
                                   which access is required to a Viatel
                                   Facility in

                                       18
<PAGE>

                                   accordance with these Viatel Facility Access
                                   Procedures;

      "Viatel Facility"            means the following sites: [list facility
                                   name], the details of which are set out in
                                   Appendix 2; and

      "Viatel NOC"                 means the Viatel Network Operation Centre.

5.    All persons granted, or wishing to be granted, access to a Viatel
      Facility, may be required, upon demand, to present appropriate proof of
      identity (which may include photographic identification). Failure to
      provide such identification may result in denial of access to a Viatel
      Facility or being required to leave a Viatel Facility forthwith.

6.    Notwithstanding the provisions set out in Sections B, C and D below, at
      those Viatel Facilities set out in Appendix 2 where, in the column marked
      "Viatel Access Controlled" the relevant entry for such Viatel Facility
      states "NO", alternative access arrangements, Planned Works and Emergency
      Works procedures shall apply. Viatel shall notify Global Voice as to the
      alternative arrangements for each such Viatel Facility as soon as
      reasonably practicable after Completion.

B     ACCESS BY AUTHORISED CONTRACTORS

1.    Global Voice shall submit to Viatel a list of those individuals whom it
      wishes to designate as its Authorised Contractors. Global Voice shall be
      entitled to increase the number of Authorised Contractors at any time by
      the provision of a written proposal to Viatel, such proposal to include a
      brief resume of the proposed individual's experience and skill set, and
      the proposal for any such additional Authorised Contractor(s) shall be
      discussed and be subject to approval by the next meeting of the Operations
      Committee. Should the Operations Committee so require, Global Voice shall
      procure the attendance of (or availability of) such proposed individual to
      the meeting of the Operations Committee in order that an interview (either
      in person or by telephone) can be carried out with the individual. Consent
      to such a person being deemed an Authorised Contractor shall not be
      unreasonably withheld by the Operations Committee (and the parties shall
      procure that their representatives act accordingly in this regard). Viatel
      may, at any time, subject to the provision of an appropriate reason
      (including, but not limited to a breach of these Viatel Facility Access
      Procedures by an Authorised Contractor and/or breach of any applicable
      health and safety legislation), require that an Authorised Contractor be
      removed from the list of Authorised Contractors and all rights of access
      to the Viatel Facilities for such person shall cease from such point in
      time. Global Voice shall ensure that its list of Authorised Contractors is
      kept up-to-date at all times to reflect any changes in personnel,
      including, in particular, so as to reflect any staff member or contractor
      departure whereupon it shall notify Viatel forthwith of such departure.

                                       19
<PAGE>

2.    Authorised Contractors (and their visitors, provided that such visitors
      are accompanied by an Authorised Contractor at all times), shall be
      entitled to access all Viatel Facilities on a 24 x 7 x 365 basis subject
      to the following procedures (which shall apply irrespective of whether
      such Authorised Contractor has been issued with a key or a fob (or other
      means of access) for a particular Viatel Facility. All reasonable costs of
      issue of any keys and/or fobs will be borne by Global Voice.

3.    Access to the Viatel Facilities shall be granted and made available to the
      Authorised Contractors in accordance with the following procedures:

      -     Subject as set out below, access to a Viatel Facility shall be
            granted to an Authorised Contractor subject to Global Voice sending
            an e-mail to Viatel's access desk at access@viatel.com. This is a
            24x7x365 monitored service. At least 30 minutes prior notice of all
            intended access to a Viatel Facility must be given so as to enable
            Viatel to make any appropriate adjustments, in particular to its
            remote monitoring systems (including the disabling of intruder
            alarms (if any)) and/or, if applicable, to comply with any
            obligations it may have to third parties having any right or
            interest in the relevant Viatel Facility. A ticket reference will be
            allocated to such access request by the Viatel access desk. In cases
            where Emergency Works are to be undertaken, Viatel will use all
            reasonable endeavours to accommodate the shortest notice time
            possible prior to allowing access to a Viatel Facility.

      -     On arrival at the Viatel Facility, the Authorised Contractor will be
            required to submit the allocated ticket number.

C     ACCESS OTHER THAN BY AUTHORISED CONTRACTORS

      All Global Voice access to the Viatel Facilities other than by the
      Authorised Contractors must be made under the supervision of Viatel.
      Supervised access will be made available in accordance with the following
      procedures:

      -     Escorted access to a Viatel Facility other than as set out in
            section B above will be made available subject to the provision by
            Global Voice of at least 2 Business Days' prior notice. Access will
            be provided at no charge subject to the following limitations:

            -     In relation to the United Kingdom, up to 3 escorted visits per
                  month on Business Days only, no more than one site visit to
                  occur on any one Business Day;

            -     In relation to France, up to 6 escorted visits per month on
                  Business Days only, no more than one visit to occur on any one
                  Business Day;

            -     In relation to Germany, up to 4 escorted visits per month on
                  Business Days only, no more than one visit to occur on any one
                  Business Day; and

                                       20
<PAGE>

            -     In relation to the Netherlands, up to 3 escorted visits per
                  month on Business Days only, no more than one visit to occur
                  on any one Business Day;

            -     In relation to Belgium, up to 3 escorted visits per month on
                  Business Days only, no more than one visit to occur on any one
                  Business Day.

            For the purpose of calculating whether the above thresholds have
            been reached, all escorted visits of any third party granted rights
            of access to the Viatel Network pursuant to Clause 10 shall be
            included within the relevant calculation.

      -     Any escorted visits to Viatel Facilities in excess of the above
            limits will be charged at the rate of (pound)350 per Business Day
            (with no more than 2 escorted different Viatel Facility visits
            within the same country being carried out on any one Business Day).

      -     In cases where escorted access is required for the purpose of
            undertaking Emergency Works, Viatel shall use reasonable endeavours
            to enable the provision of access within 4 hours of its receipt of
            the request for access, provided however that where such request is
            made outside of Business Hours, the parties acknowledge that
            travelling time (subject to a maximum of 2 hours) may be added.
            Escorted access for the purpose of undertaking Emergency Works will
            be chargeable at an hourly rate (to include travelling time where
            outside of Business Hours subject to a maximum travelling time of 2
            hours) of (pound)100 (exclusive of VAT), subject to a minimum 4 hour
            charge.

D     PLANNED WORKS/MOP PROCEDURE

1.    Where Global Voice intends to carry out Planned Works at a Viatel
      Facility, it shall give to Viatel no less than 2 Business Days' notice of
      its intention to do so, such notice to include a MOP specific to the
      proposed works.

2.    Upon receipt of the MOP, Viatel may require, acting reasonably, that all
      or any part of the Planned Works should not be carried out where it
      believes that such works will constitute a breach of health and safety
      legislation and/or, where any such works might breach any obligations owed
      to a Landowner or adversely impact the services, equipment and/or network
      of Viatel and/or of any third party. In such event, the two parties shall
      use all reasonable endeavours to agree a new method of working which
      accommodates and addresses the technical requirements and concerns of
      both. In default of agreement, the matter will be referred for escalation
      under Clause 7 of this Agreement.

3.    The requirement as to the provision of a MOP set out above shall not apply
      in the case of Emergency Works, provided however that as much notice as is
      reasonably possible in the circumstances shall be given by Global Voice to
      Viatel (which may, notwithstanding the provisions of Clause 14 be verbal
      and/or e-mail notice for these purposes) to the Viatel NOC. Such notice
      shall provide as much detail as to the nature of the required

                                       21
<PAGE>

      works as is reasonably practicable in the circumstances. No emergency
      works shall be undertaken without verbal approval being given by the
      Viatel NOC. Viatel shall procure that the Viatel NOC shall respond as
      expeditiously as possible.

4.    For the avoidance of doubt any works including the interconnection of the
      Viatel Network with any other telecommunications networks shall be
      undertaken in accordance with the relevant provisions of the Joint
      Interconnection and Access Procedures.

E     VIATEL FACILITY RULES

All visitors to any Viatel Facilities must comply with the following rules
(without prejudice to any other provision of these Viatel Facility Access
Procedures or of this Agreement):

   -  Not to create or cause to be created works that create smoke, steam or
      dust or other nuisance (such as noise, vibrations, odours and the like)
      without first obtaining the written consent of Viatel;

   -  Not to interfere or permit the interference with or remove any fire
      fighting, fire alarm, fire extinguishing or fire detection apparatus or
      systems;

   -  Not to obstruct or permit the obstruction of fire exits or the means of
      working of any fire equipment;

   -  Not to interfere or permit the interference with or the removal of any
      building system controls or settings;

   -  Not to act in such a way as might invalidate the fire certificate for the
      Viatel Facilities or to do any act, matter of thing which it is aware or
      should reasonably be aware would constitute a breach of the Underlying
      Lease or other form of occupational agreement in relation to a Viatel
      Facility or of Viatel's insurance policies for such site;

   -  Not without prior written consent of Viatel, to interfere with, alter or
      dismantle, take or permit any action to be taken which might affect the
      operation of the electrical system, power or cooling supply at the Viatel
      Facility;

   -  Not to install, impose nor permit to be installed or imposed on any part
      of the floors, walls, ceilings any load or weight greater then that for
      which the same was constructed or designed;

   -  Not to keep nor permit to be kept any material or liquid (or other
      substance which could have an adverse environmental impact) of a
      dangerous, corrosive, combustible, explosive, radioactive, volatile or
      offensive nature which might damage the Viatel Facility or any part
      thereof;

                                       22
<PAGE>

   -  Not to bring onto the Viatel Facility any propane, other gas heater of
      other heating appliance or anything which uses gas or other explosive
      materials as its fuel for operation;

   -  To use all equipment, services and facilities in accordance with their
      instructions, operating guidelines and/or any reasonable instructions
      issued by Viatel, in relation to the same;

   -  Not by any act or default to cause or permit to be caused any power supply
      or electrical supply or other utilities provided to a Viatel Facility, to
      be overloaded or subjected to use in excess of that for which the same was
      designed, provided that any loading restrictions have been first notified
      to Global Voice in writing;

   -  Not to display any signs or notices at the Viatel Facility other than such
      signs or notices as may be required under any statue or regulations;

   -  Not to remove any signage or other documentation of Viatel or its
      customers from the Viatel Facility;

   -  Not to do anything or permit to be done anything which would remove
      support from or endanger any part of the Viatel Facility;

   -  Not to use mobile phones in the Viatel Facility;

   -  Not to allow food or drink to be taken into or consumed, heated or cooked
      at the Viatel Facilities nor to allow smoking in any part of the Viatel
      Facility;

   -  To forward as soon as is reasonably possible to Viatel any notices Global
      Voice may receive from a competent authority and which relates to all or
      part of the Viatel Facility;

   -  To ensure, when exiting the Viatel Facility, that all doors are shut and,
      where appropriate, secured, lights switched off and window blinds closed;

   -  To leave the Viatel Facility immediately upon hearing the fire suppression
      klaxon (continuous air horn);

   -  To report to Viatel any observed abnormal conditions, including any damage
      and/or health and safety issues; and

   -  To remove all waste and rubbish generated by Global Voice at any time at
      the Viatel Facility and to keep the Viatel Facility neat and tidy at all
      times and to comply with any restraints and/or obligations as set out in
      Viatel's insurance policy for such facility.

                                       23
<PAGE>

F     INCREASE IN COSTS

      Viatel shall have the right to increase the costs and charges set out in
      this Schedule 1 on each anniversary date of this Agreement provided that
      any such increase shall not be greater than the percentage increase in the
      Retail Prices Index as published by the Office for National Statistics (or
      such body as may replace the same) since the preceding increase or (if
      none) since the date of this Agreement.

                                       24
<PAGE>

                                   APPENDIX 1

                            Method of Procedure (MOP)

1     AIM

The aim of this document is to define the process to be used on the delivery of
new services, works or the installation or removal of equipment with respect to
Viatel operations and sites.

2     METHOD OF PROCEDURE

The Method of Procedure (MOP) consists of three main sections as follows.

3     SCOPE OF WORKS

The scope of works must contain the following information

General summary of the Customer's requirements. This to include circuit details,
presentation, hardware, power requirements and proposed location.

A breakdown of the work required in order to achieve the Customer's
requirements.

Full details of how the work is to be executed, defining who will be doing what)
where it will be done, who is responsible for doing it (or each individual
element as the case may be) and by when it must be completed.

A list of any special instructions, considerations or information that may have
an impact upon the works.

A full H&S risk assessment.

                                       25
<PAGE>

A full risk and mitigation assessment and plan relating to service at risk
activities

4     SITE DETAILS

Viatel POP "A end" and the "B end" particulars floor rack position, customer's
or site details, telephone numbers should be provided. Site or location address
with any relevant 3rd party contact details.

5     CONTACTS

This section must include the following information: a contact list of all
personnel who have an involvement with the work or project including their
position/appointment, name and telephone number.

                                       26
<PAGE>

6     EXAMPLE

Customer / Requestor               A general summary of requirements.
Requirements

Start Date:

Expected Completion:

Summary:

Scope of Work                      Breakdown of the work required.

Implementation                     Full details of the how the work will be
                                   executed, task breakdown, who will be doing
                                   what, where it will be done, who is
                                   responsible, programme with dates.

                                       27
<PAGE>

Special                            Instructions List of any special
                                   instructions, considerations or information,
                                   special tools and equipment required,
                                   specification to be adhered to.

Health and Safety                  Full health and safety risk assessment to be
                                   provided.

Risk:

Severity: Low Medium High

Mitigation:

Service  at risk activity          Risk and mitigation plan relating to service
                                   at risk activities.

Site Details                       Locations where Work is to be implemented
                                   with any required local information and
                                   contacts where applicable.

                                       28
<PAGE>

Contacts                           List List any and all relevant personnel,
                                   telephone, e-mail and postal details
                                   including3rd party and contractors if
                                   applicable.

Name:

Company:

Position and Role for this request:

Tel:

Fax:

e-mail:

Post:

                                       29
<PAGE>

                                   APPENDIX 2

                                VIATEL FACILITIES

<TABLE>
<CAPTION>
                                            Basis
                                            upon
                                          which the
                                          allocation             Viatel
                                          Viatel to              Network
                      Rack(s) in            Global              Schematic  Viatel    ODF     Viatel                     AC
                        Carrier    Rack     Space                Drawing   Current  Access   Access               DC    UPS
Country     Name         Hotel   Location   Share       PEN      Number      Use     point Controlled  Generator Power Power
-------- ------------ ---------- -------- ----------  --------- --------- --------  ------ ----------  --------- ----- -----
<S>      <C>          <C>        <C>      <C>         <C>       <C>       <C>       <C>    <C>         <C>       <C>   <C>
                                            ODF
                                           Access
                                           Only no                        ODF
                                           space or              VIATEL-  Location
Belgium  LEERS-NORD      Yes       tbc       power    1/2        092785   only       Yes      NO          na       na    na

                                              ODF
         FRANKFURT                          Access
         19                                 Only no
         WEISSMULLE                        space or              VIATEL-
Germany  RSTRASSE        Yes       tbc       power    FRANKFURT  092786   POP        Yes      NO          Yes     Yes    No

                                              ODF
         LONDON 7                           Access
         HARBOUR                            Only no
         EXCHANGE                 Lev8,    space or              VIATEL-
UK       (REDBUS)        Yes      61.38      power    LONDON     092743   POP        Yes      NO          Yes      No   Yes

                                              ODF
         LONDON 8                           Access
         HARBOUR                            Only no
         EXCHANGE                          space or              VIATEL-
UK       (TELECITY 2)    Yes      1Z-18      power    LONDON     092744   POP        Yes      NO          Yes      No   Yes

                                              ODF
         LONDON                             Access
         BONNINGTO                          Only no
         N HOUSE                 1H7,8,9,  space or              VIATEL-
UK       (TELECITY 1)    Yes        10       power    LONDON     092745   POP        Yes      NO          Yes      No   Yes

                                              ODF
                                            Access
         LONDON                             Only no
         BRICK LANE                        space or              VIATEL-
UK       (INTERXION)     Yes     205E 3,5    power    LONDON     092746   POP        Yes      NO          Yes      No   Yes

                                              ODF
                                            Access
         LONDON                             Only no
         GLOBAL                            space or              VIATEL-
UK       SWITCH          Yes       tbc       power    LONDON     092747   POP        Yes      NO          Yes      No   Yes

                                              ODF
         LONDON                             Access
         HOSTING                            Only no
         CENTRE                  floor 3   space or              VIATEL-
UK       (PSINET)        Yes       C1P1      power    LONDON     092748   POP        Yes      NO          Yes      No   Yes

                                              ODF
                                            Access
         LONDON                             Only no
         TELEHOUSE                Bandx    space or              VIATEL-
UK       EAST            Yes      22-24      power    LONDON     092749   POP        Yes      NO          Yes      No   Yes
</TABLE>

                                30
<PAGE>

                                   SCHEDULE 2

                   JOINT INTERCONNECTION AND ACCESS PROCEDURES

A     GENERAL

1.    Each party undertakes that in exercising any right to interconnect their
      respective Networks at a Point of Interconnection, and/or to access, as
      applicable, the Viatel Chambers, or the GV Chambers for the purpose of
      inspecting, maintaining and/or installing or making alterations to their
      respective Networks (as such rights of access are detailed in the
      Agreement), it shall comply with these Joint Interconnection and Access
      Procedures.

2.    For the purposes of these Joint Interconnection and Access Procedures, the
      following words shall have the following meanings:

      "Allocated Fibres"           shall mean those fibres allocated to Global
                                   Voice comprised within the German Assets,
                                   the French Assets and the NBUK Assets as the
                                   same are detailed in Schedules II, III and
                                   IV of the Master Agreement or, as
                                   applicable, those fibres allocated to Viatel
                                   and comprised within the GV Transferred
                                   Assets as the same are defined to in the
                                   Master Agreement;

      "Business Hours"             means the hours from 9am to 5pm (local time)
                                   on any Business Day;

      "Chamber"                    means as the context requires, either a GV
                                   Chamber or a Viatel Chamber (as such terms
                                   are described in this Agreement); and
                                   "Chambers" shall be construed accordingly;

      "Emergency Interconnection   means all interconnection works which are
      Works"                       unscheduled and which are required solely to
                                   restore the provision of service; and

      "Interconnection  MOP"       means a method of procedure with respect to
                                   any proposed interconnection works, in
                                   accordance with the pro-forma MOP set out in
                                   Appendix 1, providing full details as to how
                                   the works are to be carried out.

                                       31
<PAGE>

3.    Notwithstanding the provisions set out in these Joint Interconnection and
      Access Procedures, where the Viatel Transferred Assets comprise leased or
      licensed assets, namely where the asset is used and enjoyed by Viatel
      and/or its Affiliates subject to a lease, licence or other agreement with
      a third party (including for the avoidance of doubt any owner of the
      public domain), alternative interconnection and access arrangements shall
      apply. To the extent that it is able, Viatel shall notify Global Voice of
      the alternative arrangements as soon as reasonably possible after
      Completion. Viatel can make no commitment that any interconnection or
      access arrangements will be possible given the nature of such assets;
      Viatel will, however, take such steps as it is reasonably able to
      facilitate such interconnection or access arrangements, it being agreed
      however that such obligation will not extend to requiring Viatel, to make
      any payment or otherwise incur any liability to any third party in respect
      thereof.

B.    ACCESS

1.    All access by Global Voice to any Viatel Site or Viatel Facility shall be
      subject to, respectively, the Site Lease Agreement or Licence Agreement
      relevant to the Viatel Site or, in the case of a Viatel Facility, the
      Viatel Facility Access Procedures.

2.    Access by either party to any Chamber on the Network of the other party
      and/or, in the case of Viatel, to any GV Facility, shall be subject to the
      provisions of these Joint Interconnection and Access Procedures.

3.    Each party reserves the right to be present and supervise any access by
      the other to any Chamber on its Network. Any such supervision shall not
      relieve the party being granted access to a Chamber from its obligation to
      comply in full with these Joint Interconnection and Access Procedures.

C.    INTERCONNECTION WORKS - GENERAL

1.    Each party shall take all necessary precautions (including any required by
      applicable health and safety legislation) to protect the other party's
      property (and/or that of a third party) from any physical damage during
      the course of any interconnection works.

2.    In the event of any damage being caused to the other party's property
      (and/or that of a third party) in carrying out any such works as
      contemplated by these Joint Interconnection and Access Procedures, whether
      to fibre, duct, equipment or to other items, the working party shall make
      good, at its own cost, any such damage so caused.

D     FIBRE INTERCONNECTION AT AN ODF

1.    Other than in the case of Emergency Works, no less than 2 Business Days'
      notice shall be given of any proposed interconnection at any ODF on the
      Network of the other party, such notice to be accompanied by an
      Interconnection MOP specific to the proposed

                                       32
<PAGE>

      works. Upon receipt of such notice, the Interconnection MOP procedure set
      out in Section F shall apply.

2.    The requirement set out in Section D(1) shall not apply in the case of
      Emergency Works, provided however that as much notice as is reasonably
      possible in the circumstances shall be given (which notice may,
      notwithstanding the provisions of Clause 14 be verbal and/or email notice
      for these purposes) to the network operations centre ("NOC") of the other
      party. Such notice shall provide as much detail as to the nature of the
      required works as is reasonably practicable in the circumstances. No
      Emergency Works shall be undertaken without the verbal approval being
      given by the relevant NOC. Each party shall procure that their respective
      NOCs respond as expeditiously as possible in the circumstances.

3.    The party carrying out the interconnection works shall be entitled to make
      its Point of Interconnection at the (customer facing) ports for its
      Allocated Fibres (or any part thereof) on the opposite side of the ODF to
      that of the other party.

4.    The party carrying out the interconnection works shall be responsible for
      the cost of any internal patch cabling (including the provision of
      suitable connectors) required to provide an interconnect with the other
      party's ODF, including, where the fibres have not been connected by the
      other party to its side of the ODF, the costs of any required pigtails or
      other patch cords required to do so. For these purposes it is agreed that
      the party carrying out the interconnection works shall, subject to its
      compliance with the other provisions of this Agreement (including those of
      any applicable Access Procedures), and subject to any requisite consent
      being obtained from any Landowner, have the right to install in the
      occupied space of the other party, such diverse patch cabling as may be
      reasonably required to connect the ODF to their own Network. Each party
      agrees to use its reasonable endeavours to obtain and requisite Landowner
      consents as aforesaid, all such costs related thereto being borne by the
      party carrying out the interconnection works.

5.    Connectors shall all be of the type SC-UPC other than where, in the
      applicable fibre specification, that specification states otherwise.

6.    In accessing the ODF, whether for the purposes of implementing a Point of
      Interconnection or otherwise, the party carrying out the interconnection
      works shall comply with the applicable access procedures of the other for
      the site in which such ODF is located, such access procedures in any event
      to be reasonable and of a nature standard within the telecommunications
      industry. In the case of a Viatel ODF, such access shall be made, in the
      case of a Viatel Site, in accordance with the Viatel Site Access
      Procedures and in the case of a Viatel Facility, in accordance with the
      Viatel Facility Access Procedures.

                                       33
<PAGE>

E     FIBRE INTERCONNECT/CIVIL WORKS AT A CHAMBER

1.    Subject to Section E(2) below, each party shall be responsible for
      performing (at its own cost) all excavation, digging and construction
      works (together "Civil Works"), as well as all cabling, splicing and/or
      testing works (together "Fibre Works") required in order to implement a
      Point of Interconnection between its own Network or the network of a third
      party and that of the other party. Any such works shall, without prejudice
      to and notwithstanding the terms and conditions set out in this Schedule
      2, be carried out in accordance with standard industry practice for such
      works and with due regard to the nature of the particular Chamber in
      question and in accordance with the practice of a competent provider of
      such services.

2.    All Civil Works and Fibre Works to be carried out within a Chamber shall
      be carried out either by and/or under the direct supervision of the owner
      of such Chamber, any reasonable costs associated with such works and/or
      supervision which are incurred by that owner being reimbursed to it in
      accordance with the provisions of Section H.

3.    Subject to Sections E(5) and F below, the party proposing to carry out any
      such Civil Works at or within the Chamber of the other shall provide to
      the other an Interconnection MOP in all cases where such works: (i)
      include any duct and/or fibre interconnection works (including any related
      cabling, splicing and/or testing works) at a Chamber; or (ii) will
      necessitate the opening of any Chamber for the purpose of installing new
      fibre optic cable. Upon receipt of such Interconnection MOP, the
      Interconnection MOP procedure set out in Section F shall apply.

4.    The Interconnection MOP having been agreed by the parties in accordance
      with Section F, at least 15 Business Days' notice (or such a shorter
      period as is agreed by the parties) must be given of any intention to
      understate the relevant Civil Works.

5.    The notice requirements set out above shall not apply in the case of
      Emergency Works provided however that as much notice as is reasonably
      practicable in the circumstances shall be given to the other party, (which
      notice may, notwithstanding the provisions of Clause 14 be verbal and/or
      e-mail notice for these purposes) to the network operations centre ("NOC")
      of the other party. Such notice shall provide as much detail as to the
      nature of the required works as is reasonably practicable in the
      circumstances. No Emergency Works shall be undertaken without the verbal
      approval being given by the relevant NOC. Each party shall procure that
      their respective NOCs respond as expeditiously as possible in the
      circumstances. Approval shall only be given in relation to access to the
      relevant Chamber: access to the splice closures (and any related work
      thereon) within such Chamber being only available to the owner of such
      Chamber.

                                       34
<PAGE>

F     INTERCONNECTION MOP PROCEDURE

1.    Upon receipt of the Interconnection MOP, the receiving party may require,
      acting reasonably, that all or any part of the planned works should not be
      carried out where it believes that such works will constitute a breach of
      health and safety legislation and/or where any such works might breach any
      obligations owed to a Landowner or adversely impact the services,
      equipment and/or network of itself and/or of any third party. In such an
      event, the two parties shall use all reasonable endeavours to agree a new
      method of working which accommodates and addresses the technical
      requirements and concerns of both. In default of an agreement as to a
      revised method of working, the matter will be referred for escalation
      under Clause 7 of this Agreement.

2.    In the event that the party on whom the Interconnection MOP has been
      served has not within: (i) 2 Business Days, in the case of fibre
      interconnection at an ODF; or (ii) 5 Business Days, in the case of Civil
      Works at a Chamber, notified the other party that it will require changes
      to the Interconnection MOP, then the Interconnection MOP shall be deemed
      approved.

3.    Approval of the MOP, whether deemed or otherwise, shall not in any way
      operate so as to limit the submitting party's liability under the terms
      and conditions of this Agreement and it shall be the submitting party's
      responsibility to comply fully with such terms and conditions at all
      times.

G     COMPLETION PROCEDURE

      Following completion of any works as contemplated by this Schedule 2, the
      party carrying out any such works shall provide, at its own cost, the
      other with appropriate documentation sufficient to allow that other to
      comply, on a timely basis, with any obligations it may have (if any) under
      the New Roads and Street Works Act 1991 (or any similar or analogous
      legislation in any other country in which such works may be carried out)
      in relation to the works carried out upon or in relation to its Network.

H     COSTS

      Where the provisions of this Schedule 2 state that costs of one party are
      to be borne by the other party, reference to costs shall be deemed to mean
      the reasonable costs incurred (the party having incurred such costs having
      used reasonably endeavours to minimise the same) plus an administrative
      charge of 15% (exclusive of VAT).

                                       35
<PAGE>

                                   APPENDIX 1

[VIATEL LOGO]

                               METHOD OF PROCEDURE

PROJECT NAME:                      Sheet:                            1 of 5

Amendment:                         Date of Issue:

CONTRACT

Client                             VTL (UK) Ltd

Planning

Contract Manager

Project Manager

Safety Advisor

Start Date:

Duration:

DESCRIPTION OF WORK TO BE UNDERTAKEN:
<PAGE>

HAZARDS:                       See Health & Safety Risk Assessment Form Attached

Trip

Fire Routing

Safe Access / Ingress

Flammable substances

Hazardous substances

Manual Handling

Working from ladders

CIRCULATION:

Health & Safety File

                                       37
<PAGE>

[COMPANY LOGO]

PROJECT NAME                  Sheet:                  2 of 5

Amendment:                    Date of issue:

Method Statement

EXAMPLE:

CIRCULATION:

Health & Safety File

                                       38
<PAGE>

[COMPANY LOGO]

Project Name:                 Sheet:                  3 of 5

Amendment:                    Date of issue:

Method Statement

Labour:

The following labour resources will be allocated to the project:

Plant:

The following plant resources will be allocated to the project:

                                       39
<PAGE>

The contents of this Method Of Procedure have been made known to all employees
and others who may be affected by the activity.

Originator: ________________________________________________________

Signature:  ________________________________________________________

Date:       ________________________________________________________

CIRCULATION:

Health & Safety File

                                       40
<PAGE>

[COMPANY LOGO]

Project Name:                 Sheet:                  4 of 5

Amendment:                    Date of issue:

                                 HEALTH & SAFETY

                              RISK ASSESSMENT FORM

Note; the purpose of this section is to identify any potential risks to persons
and property in respect of this installation. To take the appropriate
preventative measures and ensure all relevant parties are aware of the risks and
required precautions before the installation commences. This risk assessment
must be communicated to everyone concerned by the works (including but not
limited to the Client, Customer, employees & sub-contractors) and be available
at all times on site.

<TABLE>
<CAPTION>
HAZARD TYPE                         RISK     LEVEL      COMMENTS/NOTES/ACTIONS.
                                    (Y/N)    (L/M/H)
--------------------------------    ----     ------     ------------------------
<S>                                 <C>      <C>        <C>
Trip Hazards

Electrical Discharge

Soldering Fumes

Fire routing

Slip Hazards

Falling Objects

Safe access & ingress

Room Illumination

Release of fire suppression
Fire hazards

Overhead Danger

Exposure to rodents
</TABLE>

                                       41
<PAGE>

<TABLE>
<CAPTION>
HAZARD TYPE                         RISK     LEVEL      COMMENTS/NOTES/ACTIONS.
                                    (Y/N)    (L/M/H)
--------------------------------    ----     ------     ------------------------
<S>                                 <C>      <C>        <C>
Exposure to hazardous substances

Hazards to other
operatives/personnel on site

Exposure to asbestos

Manual handling

Working with batteries

Roadside working

Risk of falling

Noise from site services

Working from Ladders
</TABLE>

CIRCULATION:

Health & Safety File

                                       42
<PAGE>

[COMPANY LOGO]

Project Name:                 Sheet:                  5 of 5

Amendment:                    Date of issue:

                                 HEALTH & SAFETY

                              RISK ASSESSMENT FORM

Originator: ________________________________________________________

Signature:  ________________________________________________________

Date:       ________________________________________________________

CIRCULATION:

Health & Safety File

                                       43
<PAGE>

                                   SCHEDULE 3

                                    COVENANTS

PART I - GLOBAL VOICE COVENANTS

Global Voice covenants with Viatel throughout the Term, both for itself and for
any Global Voice Group Company, as follows:

1.    To keep the Viatel Transferred Assets and all other equipment and/or
      infrastructure in the ownership, possession or control of any Global Voice
      Group Company and which is situated on any Landowner's land or property
      (all of which shall, for the purposes of this Schedule 3 be together
      referred to as the "GLOBAL VOICE INFRASTRUCTURE") in good and substantial
      repair and condition to the extent only that (a) the repair and/or
      condition of the Viatel Transferred Assets has a direct impact upon the
      Viatel Network; and/or (b) the Viatel Transferred Assets are themselves
      leased by Viatel (or a Viatel Group Company), it being agreed that the
      provisions of this paragraph 1 shall not apply to Global Voice to the
      extent the repair and condition of the Global Voice Infrastructure is the
      responsibility of Viatel under the Viatel Core Operational Services and/or
      any Additional Operational Services.

2.    In the course of carrying out any works on any Landowner's land or
      property in respect of the installation, alteration or maintenance of any
      of the Global Voice Infrastructure, to use all reasonable endeavours to
      avoid any physical damage to any part of the Landowner's land or property
      and, in the event that any damage is so caused, Global Voice shall as soon
      as is practicable after such damage has occurred carry out or cause to be
      carried out at its own expense any such repair works as are necessary so
      that the Landowner's land or property so damaged is restored to the
      condition it was in prior to such damage occurring.

3.    Not to do anything which is or may become a nuisance or annoyance to
      Viatel, any Landowner or any owner or occupier of neighbouring or
      adjoining property, or which may cause damage to the land or property of
      Viatel and/or any Landowner or to any neighbouring or adjoining property
      including damage attributable to the neglect, default or carelessness of
      Global Voice, or of any Global Voice Group Company and/or their respective
      employees, agents, visitors, sub-tenants, contractors or licensees.

4.    To observe and comply with the provisions and requirements of all
      legislation (including, but without limitation, any and all health and
      safety legislation) whether public or local directly affecting the Global
      Voice Infrastructure and/or the Viatel Network or the use of the same,
      including without limitation planning and telecommunications legislation,
      and not to do or omit anything affecting the land or property of any
      Landowner which is in

                                       44
<PAGE>

      breach of such legislation but to do and provide everything required to be
      done or required by such legislation and to indemnity Viatel against all
      proceedings, penalties, costs or claims in respect of any acts or
      omissions in breach of such legislation.

5.    That if Global Voice receives notice of any order or proposal under any
      legislation, to give notice to Viatel immediately and, insofar it relates
      to the Global Voice Infrastructure, if so reasonably required by Viatel,
      to make or join with Viatel in making such objections or representations
      in respect of any order or proposal as Viatel may reasonably require and
      to comply at its own cost with any notice or order relating to Viatel
      under any such legislation.

6.    That if Viatel is required by any Governmental Authority, Landowner or
      other person having the authority so to require, to relocate any segment
      of the Viatel Network in which is located any Global Voice Infrastructure,
      to give Viatel all such assistance as Viatel may reasonably require in
      connection with such relocation works.

7.    Not to permit or suffer to be done in or upon the Global Voice
      Infrastructure anything which in the reasonable opinion of Viatel and/or
      any Landowner may or might become a danger or nuisance to Viatel and/or
      any Landowner, their licensees, tenants or the occupiers of any adjoining
      or neighbouring property or to the general public and, at its own expense,
      it shall take all reasonable precautions as may be necessary for the
      avoidance thereof.

8.    Not to do or permit to be done during the carrying out of any
      interconnection or other works in connection with the Global Voice
      Infrastructure anything which may cause any interference with or obstruct
      or which may cause delay to traffic on any road forming part of any land
      or property of any Landowner or any injury or damage to any other property
      of the Landowner.

PART II - VIATEL COVENANTS

Viatel covenants with Global Voice throughout the Term, both for itself and for
any Viatel Group Company, as follows:

9.    To keep the Global Voice Transferred Assets and all other equipment and/or
      infrastructure in the ownership, possession or control of any Viatel Group
      Company and which is situated on any Landowner's land or property (all of
      which shall, for the purposes of this Schedule 3 be together referred to
      as the "Viatel Infrastructure") in good and substantial repair and
      condition to the extent only that (a) the repair and/or condition of the
      Global Voice Transferred Assets has a direct impact upon the Global Voice
      Network; and/or (b) the Global Voice Transferred Assets are themselves
      leased by Global Voice (or a Global Voice Group Company), it being agreed
      that the provisions of this paragraph 1 shall not apply to Viatel to the
      extent that the repair and condition of the Viatel Infrastructure is the
      responsibility of Global Voice under the GV Core Operational

                                       45
<PAGE>

      Services and/or any Additional Operational Services. Global Voice is
      responsible for maintaining any of the Viatel Infrastructure.

10.   In the course of carrying out any works on any Landowner's land or
      property in respect of the installation, alteration or maintenance of any
      of the Viatel Infrastructure, to use all reasonable endeavours to avoid
      any physical damage to any part of the Landowner's land or property and,
      in the event that any damage is so caused, Viatel shall as soon as is
      practicable after such damage has occurred carry out or cause to be
      carried out at its own expense any such repair works as are necessary so
      that the Landowner's land or property so damaged is restored to the
      condition it was in prior to such damage occurring.

11.   Not to do anything which is or may become a nuisance or annoyance to
      Global Voice, any Landowner or any owner or occupier of neighbouring or
      adjoining property, or which may cause damage to the land or property of
      Global Voice and/or any Landowner or to any neighbouring or adjoining
      property including damage attributable to the neglect, default or
      carelessness of Viatel, or of any Viatel Group Company and/or their
      respective employees, agents, visitors, sub-tenants, contractors or
      licensees.

12.   To observe and comply with the provisions and requirements of all
      legislation (including, but without limitation, any and all health and
      safety legislation) whether public or local directly affecting the Viatel
      Infrastructure and/or the Global Voice Network or the use of the same,
      including without limitation planning and telecommunications legislation,
      and not to do or omit anything affecting the land or property of any
      Landowner which is in breach of such legislation but to do and provide
      everything required to be done or required by such legislation and to
      indemnify Global Voice against all proceedings, penalties, costs or claims
      in respect of any acts or omissions in breach of such legislation.

13.   That if Viatel receives notice of any order or proposal under any
      legislation, to give notice to Global Voice immediately and, insofar it
      relates to the Viatel Infrastructure, if so reasonably required by Global
      Voice, to make or join with Global Voice in making such objections or
      representations in respect of any order or proposal as Global Voice may
      reasonably require and to comply at its own cost with any notice or order
      relating to Global Voice under any such legislation.

14.   That if Global Voice is required by any Governmental Authority, Landowner
      or other person having the authority so to require, to relocate any
      segment of the Global Voice Network in which is located any Viatel
      Infrastructure, to give Global Voice all such assistance as Global Voice
      may reasonably require in connection with such relocation works.

15.   Not to permit or suffer to be done in or upon the Viatel Infrastructure
      anything which in the reasonable opinion of Global Voice and/or any
      Landowner may or might become a

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      danger or nuisance to Global Voice and/or any Landowner, their licensees,
      tenants or the occupiers of any adjoining or neighbouring property or to
      the general public and, at its own expense, it shall take all reasonable
      precautions as may be necessary for the avoidance thereof.

16.   Not to do or permit to be done during the carrying out of any
      interconnection or other works in connection with the Viatel
      Infrastructure anything which may cause any interference with or obstruct
      or which may cause delay to traffic on any road forming part of any land
      or property of any Landowner or any injury or damage to any other property
      of the Landowner

                                       47
<PAGE>

                                   SCHEDULE 4

                           GV CORE OPERATIONAL SERVICE

                                       48
<PAGE>

                                   SCHEDULE 5

                        VIATEL CORE OPERATIONAL SERVICES

The Viatel Core Operational Services will comprise the provision of rights of
access to the Viatel Network in accordance with Clauses 2 and 3 of this
Agreement and the provision of network maintenance services reflecting these
services provided to it under the following agreements:

(a)   For the United Kingdom, those services which are provided in accordance
      with the Fibre and Duct Maintenance Agreement between NTL Group Limited
      and VTL (UK) Limited dated 9th July 2004 and those services which are
      provided in accordance with the Agreement for the Maintenance of
      Facilities and Infrastructure between Ringway Electrical Southern Limited
      and VTL (UK) Limited dated 23rd June 2004 as the same is in rollover
      pending finalisation of a new agreement;

(b)   For Germany, those services which are provided in accordance with the
      Agreement on the Maintenance and Administration of a Fibre Optic Route
      between Viatel GmbH and Gasline Telekommunicationsnetsgesellschaft
      deutscher GmbH and those services which are provided in accordance with
      the Agreement on the Provision of System Equipment Services between
      Ruhrgas Aktiengesellschaft and VTL Telecom GmbH dated 6th January 2003 and
      the First Modification of the Agreement on the Provision of System
      Equipment Services between Ruhrgas Aktiengesellschaft and VTL Telecom GmbH
      effective 1st May 2003;

(c)   For France, those services which are provided in accordance with the
      Maintenance Agreement between Louis Dreyfus Communications S.A. and Viatel
      Operations S.A. dated 3rd August 2000, the Amendment to the Maintenance
      Agreement between Louis Dreyfus Communications S.A. and Viatel Operations
      S.A. dated 19th March 2001, the Second Amendment to the Maintenance
      Agreement between Louis Dreyfus Communications S.A. and Viatel Operations
      S.A. dated 3rd July 2002, the Third Amendment to the Maintenance Agreement
      between Louis Dreyfus Communications S.A. and Viatel Operations S.A. dated
      12th June 2003, the Fourth Amendment to the Maintenance Agreement between
      Neuf Telecom and Viatel Operations S.A. dated 18th March 2004, the Fifth
      Amendment to the Maintenance Agreement between Neuf Telecom and Viatel
      Operations S.A. dated 1st April 2005 and the Sixth Amendment to the
      Maintenance Agreement between Neuf Telecom and Viatel Operations S.A.
      signed by Viatel on 17th March 2006;

(d)   For Belgium, those services which are provided in accordance with the
      offer for Maintenance Services in Holland and Belgium between Volker
      Stevin Netwerk Services b.v. and VTL (UK) Limited dated 4th July 2003 as
      the same is in rollover pending finalisation of a new agreement;

                                       49
<PAGE>

(e)   For the Netherlands, those services which are provided in accordance with
      the offer for Maintenance Services in Holland and Belgium between Volker
      Stevin Netwerk Services b.v. and VTL (UK) Limited dated 4th July 2003 as
      the same is in rollover pending finalisation of a new agreement; and

(f)   For the Channel submarine cables, those services which are provided in
      accordance with the Agreement for the Provision of Repair and Maintenance
      Services to the Circe North and Circe South Cable Systems between Global
      Marine Systems Limited and VTL (UK) Limited dated 20th July 2005.

                                       50
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                                   SCHEDULE 6

                              OPERATIONS COMMITTEE

PART I - SPECIFIC TERMS OF REFERENCE

-     Agreement of a form of Fibre Reallocation for the purpose of the Network
      Lease and Option and Transfer Agreement (as all such terms are defined in
      the Master Agreement)

-     Review of performance of third party contractors/maintenance providers

-     Selection of third party contractors/maintenance providers

-     Review of operating costs/cost-saving opportunities (including, where
      appropriate, consideration of closing Viatel Sites)

-     Operational testing/monitoring

-     Plans to expand operational service capacity to support expansion and
      extension of Viatel/Global Voice service; to include timescales

-     Plans to install additional infrastructure including any sub-ducts in
      existing ducts

-     Plans to maximise use of shared facilities and/or any related
      environmental or utility supply

-     Allocation of available power and cooling capacity as between the parties
      at each of the Viatel Sites at Egham (UK), Telehouse (UK) and Halfweg
      (Holland).

-     Interconnection issues as between Global Voice/Viatel

-     Maintenance of each party's facilities and infrastructure

-     Performance of Authorised Contractors

-     Approval of additional Authorised Contractors

-     Requests by Viatel for access to GV Off-Net Buildings

-     Requests by Viatel for additional fibre pairs or operational space on GV
      Network

-     Operational issues relating to transfer to Viatel of additional fibre
      pairs on GV Network

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PART II - INITIAL COMPOSITION

     Steve Best                       CTO, Viatel

     Neil Cubitt                      Head of Property and Facilities, Viatel

     Dary McGovern                    CTO ,Global Voice

     Gerry Murray                     Director of Operations, Global Voice

                                       52
<PAGE>

SIGNED by                                )
a duly authorised signatory of           ) /s/ Lucy Woods
VIATEL HOLDING (BERMUDA) LIMITED         )

SIGNED by                                )
a duly authorised signatory of           ) /s/ Chris Nightingale
GLOBAL VOICE GROUP LIMITED               )

                                       53

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