Document:

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                                                                  EXECUTION COPY

                                                                    Exhibit 10.6

                          CAPACITY COMMITMENT AGREEMENT

            THIS CAPACITY COMMITMENT AGREEMENT, dated as of November 24, 1999
(as amended, supplemented or otherwise modified from time to time, this
"Agreement"), among GLOBAL CROSSING USA INC., a corporation organized and
existing under the laws of the State of Delaware and having its principal office
in Beverly Hills, California (said company, and any permitted successor or
assign hereunder, the "Grantor"), SOFTBANK CORP., a Japanese corporation
("Softbank"), and MICROSOFT CORPORATION, a Washington corporation ("Microsoft";
and together with Softbank, the "Purchasers").

                             W I T N E S S E T H:

            WHEREAS, Atlantic Crossing Ltd. has constructed a fiber optic cable
system connecting the United States, the United Kingdom, the Netherlands and
Germany known as the Atlantic Crossing System or "AC-1"; Pacific Crossing Ltd.
is constructing a fiber optic cable system connecting the United States and
Japan known as the Pacific Crossing System or "PC-1"; Mid-Atlantic Crossing Ltd.
is constructing a fiber optic cable system connecting New York, Florida and St.
Croix, known as the Mid-Atlantic Crossing System or "MAC"; Pan American Crossing
Ltd. is constructing a fiber optic cable system connecting California, Mexico,
Panama, Venezuela and St. Croix, known as the Pan American Crossing System or
"PAC"; GC Pan European Crossing Holdings B.V. is constructing a fiber optic
cable network connecting various principal cities in Europe, known as
Pan-European Crossing or "PEC"; South American Crossing Ltd. is constructing a
fiber optic cable system connecting various principal cities in South America,
known as South American Crossing or "SAC"; and Global Access Ltd. is
constructing a fiber optic cable system connecting various principal cities in
Japan, known as Global Access or "GAL" (and together with any other Japanese
intercity network controlled (directly or indirectly) by the Grantor and/or its
subsidiaries, the "Japanese Intercity Networks");

            WHEREAS, the Grantor and/or its affiliates are in the process of
developing a fiber optic cable system connecting Japan, Taiwan, Korea, The
Peoples Republic of China (including Hong Kong), the Philippines, Singapore and
Malaysia, known as East Asia Crossing or "EAC";

            WHEREAS,   Atlantic   Crossing   Ltd.,   Pacific   Crossing  Ltd.,
Mid-Atlantic  Crossing  Ltd.,  Pan  American  Crossing  Ltd.,  GC Pan European
Crossing  Holdings  B.V.  and South  American  Crossing  Ltd.  are referred to
herein as the "System  Companies" and AC-1,  PC-1, MAC, PAC, PEC, SAC, EAC and
the Japanese Intercity Networks are referred to herein as the "Systems";

            WHEREAS,  the  Grantor  is  affiliated  with  each  of the  System
Companies;

            WHEREAS, additional companies under common control with the Grantor
may in the future construct other systems, though there is no obligation to do
so, in which case such additional companies will be deemed to be "System
Companies" under this Agreement and such additional systems will be deemed to be
"Systems" under this Agreement; and
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            WHEREAS, the Purchasers desire to acquire rights with respect to
capacity on one or more of the Systems on an indefeasible right of use basis
("IRU");

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

1.    DEFINITIONS.

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

      "CPA" shall have the meaning assigned thereto in Section 2(g).

      "Dollars" or "$" means United States Dollars.

      "Final Payment Date" means the last day of the Purchase Period.

      "Minimum Capacity Unit" or "MCU" means, with respect to any System, the
minimum amount of capacity that may be purchased by the Purchasers on such
System. The Grantor shall designate the MCU on each System.

      "Purchase Period" means the period beginning on the Trigger Date and
ending on the third anniversary of such date.

      "Shareholders   Agreement"   means  the  Subscription  and  Shareholders
Agreement,  dated  as of  September  8,  1999,  among  Global  Crossing  Ltd.,
Softbank,  Microsoft,  The Goldman Sachs Group,  Inc. and Asia Global Crossing
Holdings Ltd.

      "Subsidiary" means as to any Person, (i) any corporation of which more
than 20% of the outstanding stock of any class or classes having by the terms
thereof ordinary voting power to elect a majority of the directors of such
corporation (irrespective of whether or not at the time stock of any class or
classes of such corporation shall have or might have voting power by reason of
the happening of any contingency) is at the time owned by such Person and/or one
or more Subsidiaries of such Person and (ii) any partnership, association, joint
venture or other entity in which such Person and/or one or more Subsidiaries of
such Person have more than a 20% equity interest therein.

      "Trigger Date" means the date on which PC-1 is able to carry trans-pacific
traffic.
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                                                                               3

2.    PURCHASE AGREEMENT.

      (a) The Purchasers hereby unconditionally and irrevocably agree to
purchase, pay for and activate (and/or cause one or more of their respective
Subsidiaries) to purchase, pay for and activate) MCUs on PC-1 and/or the
Japanese Intercity Networks during the Purchase Period in an aggregate amount
equal to $200,000,000 (the "Commitment").

      (b) The Purchasers agree to utilize the Commitment as follows:

            (i) $20,000,000 of the Commitment shall be purchased and activated
      on PC-1 and the Japanese Intercity Networks no later than the Trigger
      Date;

            (ii) an additional $20,000,000 of the Commitment shall be purchased
      and activated on PC-1 and the Japanese Intercity Networks during the
      period from the Trigger Date to December 31, 2000; and

            (iii) the balance of the Commitment (representing $160,000,000)
      shall be purchased and activated during the Purchase Period in accordance
      with the terms hereof.

      (c) The payment terms for purchases of MCU in accordance with the terms
hereof shall be as follows:

            (i) payment for purchases pursuant to clause (i) of Section 2(b)
      will be made in two installments, with the Purchasers and/or their
      respective Subsidiaries making a payment of $5,000,000 on the Trigger
      Date, and the Purchasers and/or their respective Subsidiaries making an
      additional payment of $15,000,000 not later than the date which is 360
      days after the Trigger Date; and

            (ii) payment for purchases pursuant to clause (ii) of Section 2(b)
      will be made in two installments, with the Purchasers and/or their
      respective Subsidiaries making a payment of $5,000,000 on the date the
      Purchasers activate the applicable capacity, and the Purchasers and/or
      their respective Subsidiaries making an additional payment of $15,000,000
      not later than the date which is 360 days after such activation date.

The additional payments referred to under clauses (i) and (ii) above which are
not due when the related capacity is activated shall accrue interest at a rate
per annum equal to the prime rate announced from time to time by The Chase
Manhattan Bank, N.A., and such interest shall be payable by the Purchasers on
the date such amounts are due. All payments made hereunder shall be irrevocable.

      (d) Purchases of capacity on PC-1 referred to above will represent
capacity from Global Access Ltd.'s point of presence in Tokyo, Japan to Global
Crossing's point of presence in or about San Francisco, California, Los Angeles,
California or Seattle, Washington. Except as set forth in clause (i) of Section
2(b), the Purchasers shall be permitted to utilize the Commitment during the
Purchase Period for purchases of MCUs on other operational Systems, subject to
the terms and
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                                                                               4

conditions of this Agreement, provided that the Purchasers shall use commercial
reasonable efforts to use the Commitment on PC-1.

      (e) The commitment contained herein to purchase MCUs is in addition to,
and separate from, any and all other commitments of the Purchasers and/or any of
their respective Subsidiaries to purchase capacity on the Systems. For the
avoidance of doubt, (i) a purchase of an MCU hereunder will not be deemed to
reduce or fulfill any other contractual commitment or other obligation to
purchase capacity on any System, other than purchases made by the Purchasers
and/or their respective Subsidiaries pursuant to Section 8.2(a) of the
Shareholders Agreement, (ii) a purchase of an MCU by the Purchasers or any of
their respective Subsidiaries pursuant to any other contractual commitment or
other obligation to purchase capacity on any System shall not be credited toward
the Commitment unless such other commitment or obligation arises after the date
hereof, has been entered into pursuant to Section 8.2(a) of the Shareholders
Agreement and otherwise satisfies the obligations of the Purchaser hereunder and
(iii) the obligation to purchase MCUs hereunder shall not be subject to the
provisions of Section 8.2 of the Shareholders Agreement.

      (f) The price for MCUs on any System purchased pursuant to Section 2(a) or
2(b) hereof at any time shall be at a per MCU price no higher than the per MCU
price (determined by dividing the total commitments of the Customer referred to
below by the total number of MCUs to be provided to such Customer under such
commitments) at which capacity has been sold prior to such time, or is being
sold at such time, by the Grantor or its affiliates, as applicable, on such
System to a customer, other than to the Grantor's affiliates (a "Customer"),
taking into account the net present value of the Commitment, on the one hand,
and the net present value of the aggregate purchase commitments made by such
Customer, on the other hand. In calculating the foregoing, the price for any
capacity that is only to be delivered at a future date based on (directly or
indirectly) upgradeability and/or capacity availability shall not be considered.

      (g) Each purchase of MCUs on any System pursuant to Section 2(a) or 2(b)
of this Agreement shall be effected by the applicable Purchaser executing,
delivering and complying with a capacity purchase agreement (a "CPA"), such CPA
to contain substantially the same terms and conditions regarding capacity as set
forth in the form capacity purchase agreement which is generally being executed
by Global Crossing in the market at the time such MCUs are being acquired.
Attached hereto as Exhibit A is the current form CPA which is currently
generally being executed by Global Crossing in the market.

      (h) If, at any time during the Purchase Period, either Purchaser shall
have determined that any portion of the MCUs which have been purchased, fully
paid for and activated by such Purchaser pursuant to this Agreement have not
been and could not reasonably be expected to be used by such Purchaser and/or
its permitted assigns, such Purchaser shall exclusively use the Grantor (and/or
one of its affiliates) as its marketing agent and, in such capacity, the Grantor
shall use commercially reasonable efforts to market such unused capacity. In
consideration of such marketing services, the Grantor (or one of its affiliates
as designated by it) shall be entitled to receive a fee from the applicable
Purchaser for each marketed MCU in an amount equal to 5% of the consideration
received from the marketing of such MCU. Each such fee shall be payable in
Dollars on the date the applicable MCU is sold. If the Grantor shall not have
successfully sold any MCU to be marked
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                                                                               5

under this paragraph within 3 months of the applicable Purchaser's written
request (made in accordance with the terms hereof), such Purchaser shall be
permitted to replace the Grantor as marketing agent for such MCU. The Grantor
makes no warranty or guarantee that any MCU which is requested to be marketed
will eventually be marketed, nor does the Grantor make any warranty or guarantee
with respect to the price at which such MCU shall be marketed. Each Purchaser
agrees that its sole and exclusive remedy in respect of any breach by the
Grantor of its obligations under this paragraph (h) shall be to replace the
Grantor as marketing agent.

      (i) Each Purchaser shall be severally liable for 50% of the Commitment.
Any purchase of MCUs hereunder by an entity which is a Subsidiary of both
Softbank and Microsoft shall be (i) applied to the Commitment in an amount equal
to such purchase and (ii) allocated between Softbank and Microsoft based upon
their respective ownership interests in such Subsidiary.

3.    REPRESENTATIONS

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

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

4.    SETTLEMENT OF DISPUTES.

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

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

5. GOVERNING LAW.

   THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE
LAWS OF THE STATE OF NEW YORK, UNITED STATES OF AMERICA.

6. NO THIRD PARTY BENEFICIARIES; WAIVER OF IMMUNITY.

      This Agreement does not provide and is not intended to provide third
parties (including, but not limited to, customers of the Purchasers) with any
remedy, claim, liability, reimbursement, cause of action, or any other right.
The parties hereto acknowledge that this Agreement is commercial in nature, and
each party hereto expressly and irrevocably waives any claim or right which it
may have to immunity (whether sovereign immunity, act of state or otherwise) for
itself or with respect to any of its assets in connection with an arbitration,
arbitral award or other proceeding to enforce this Agreement, including, without
limitation, immunity from service of process, immunity of any of its assets from
pre- or post-judgment attachment or execution and immunity from the jurisdiction
of any court or arbitral tribunal.

7. ASSIGNMENT .

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

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

      (c) The Purchasers shall solely be responsible for complying with all of
the terms binding on the "Purchasers" hereunder and shall not be permitted to
assign, transfer or otherwise dispose of any or all of its right, title or
interest hereunder or delegate any or all of its obligations hereunder to any
person or entity; provided, that each Purchaser may assign its right to enter
into a CPA with the Grantor to any present or future entity which is a
Subsidiary of such Purchaser or to the other
<PAGE>   7
                                                                               7

Purchaser and either Purchaser can assign the Commitment to the other Purchaser.
The Purchasers shall give the Grantor notice of any such assignment.

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

8.    NOTICES.

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

                     If to Microsoft:     Microsoft Corporation
                                          One Microsoft Way
                                          Redmond, Washington  98052
                                          Attn: Chief Financial Officer
                                          Fax No. (425) 936-7329

                     If to Softbank:      Softbank Corp.
                                          24-1, Nishrubashi-Hakozakicho, Chuonko
                                          Tokyo, Japan  103-8501
                                          Attn:  Chief Executive Officer
                                          Fax No. (813) 5211-3082

                                          and

                                          Softbank Inc.
                                          10 Langley Road, Suite 403
                                          Newton, MA 02459
                                          Attn:  Ron Fisher
                                          Fax No. (617) 928-9301

                     If to the Grantor:   Global Crossing USA Inc.
                                          150 El Camino Drive
                                          Suite 204
                                          Beverly Hills, California 90210
                                          Attn: General Counsel
                                          Fax No.: 310-281-5820

      Any change to the name, address and facsimile numbers may be made at any
time by giving fifteen (15) days prior written notice in accordance with this
Section. Any such notice, demand or other communication shall be deemed to have
been received, if delivered by hand, at the time of
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delivery or, if posted, at the expiration of seven (7) days after the envelope
containing the same shall have been deposited in the post maintained for such
purpose, postage prepaid, or, if sent by facsimile, at the date of transmission
if confirmed receipt is followed by postal notice.

9.    SEVERABILITY .

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

10.   HEADINGS

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

11.   COUNTERPARTS.

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

12.   ENTIRE AGREEMENT

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

13.   PUBLICITY AND CONFIDENTIALITY.

      The provisions of this Agreement and any non-public information, written
or oral, with respect to this Agreement ("Confidential Information") will be
kept confidential and shall not be disclosed, in whole or in part, to any person
other than affiliates, officers, directors, employees, agents or representatives
of a party (collectively, "Representatives") who need to know such Confidential
Information for the purpose of negotiating, executing and implementing this
Agreement. Each party agrees to inform each of its Representatives of the
non-public nature of the Confidential Information and to direct such persons to
treat such Confidential Information in accordance with the terms of this
Section. Nothing herein shall prevent a party from disclosing Confidential
Information (i) upon the order of any court or administrative agency, (ii) as
required by law or upon the request or demand of, or pursuant to any regulation
of, any regulatory agency or authority, (iii) to the extent reasonably required
in connection with the exercise of any remedy hereunder, (iv) to a party's legal
counsel or independent auditors, (v) to prospective lenders to the Grantor, (vi)
to the extent necessary, to the operator, maintain or and administrator of any
System and/or (vii) to any actual or proposed permitted assignee of all or part
of its rights hereunder
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provided that such actual or proposed assignee agrees in writing to be bound by
the provisions of this Section. Notwithstanding the foregoing, in the event that
either Purchaser intends to disclose any Confidential Information pursuant to
clause (i) or (ii) of the preceding sentence, such Purchaser agrees to (a)
provide the Grantor with prompt notice before such disclosure in order that the
Grantor may attempt to obtain a protective order or other assurance that
confidential treatment will be accorded such Confidential Information and (b)
cooperate with the Grantor in attempting to obtain such order or assurance.

14.   LIMITATION OF LIABILITY.

      In no event shall the Purchasers or the Grantor (or any of its affiliates)
be liable to the other for consequential, incidental, indirect or special
damages, including, but not limited to, loss of revenue, loss of business
opportunity, or the costs associated therewith.
<PAGE>   10
            IN WITNESS WHEREOF, the parties hereto have executed this Agreement
in the jurisdictions set forth beneath their signatures, effective on the date
first written above.

GLOBAL CROSSING USA INC.

By: /s/ SHERRI L. COOK
   --------------------------------
      Name: Sherri L. Cook
      Title: Vice President

MICROSOFT CORPORATION

By: /s/ GREGORY B. MAFFEI
   --------------------------------
      Name: Gregory B. Maffei
      Title: Senior VIce President; Chief Financial Officer

SOFTBANK CORP.

By: /s/ MASAYOSHI SON
   --------------------------------
      Name: Masayoshi Son
      Title: Chairman

<PAGE>   11
                                                                       Exhibit A

                       Form of Capacity Purchase Agreement

                                    [to come]<PAGE>   1
                                                                  EXECUTION COPY

                                                                    Exhibit 10.7

                          REGISTRATION RIGHTS AGREEMENT

                          dated as of November 24, 1999

                                  By and among

                              Global Crossing Ltd.,

                                 Softbank Corp.,

                             Microsoft Corporation,

                            Asia Global Crossing Ltd.

                                       and

                          The Goldman Sachs Group, Inc.
<PAGE>   2
                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                            Page
                                                                            ----
<S>                                                                         <C>
Section 1.  Definitions ................................................       1

Section 2.  Demand Registration ........................................       2

         (a)  Requests for Registration ................................       2

         (b)  Filing and Effectiveness .................................       3

         (c)  Priority on Demand Registration ..........................       4

         (d)  Postponement of Demand Registration ......................       4

Section 3.  Piggyback Registration .....................................       4

         (a)  Right to Piggyback .......................................       4

         (b)  Priority on Piggyback Registrations ......................       5

Section 4.  Registration Procedures ....................................       6

Section 5.  Registration Expenses ......................................      11

Section 6.  Indemnification ............................................      12

         (a)  Indemnification by the Company ...........................      12

         (b)  Indemnification by Holders ...............................      12

         (c)  Conduct of Indemnification Proceedings ...................      12

         (d)  Contribution .............................................      13

Section 7.  Underwritten Registrations .................................      13

Section 8.  Miscellaneous ..............................................      14

         (a)  Remedies .................................................      14

         (b)  Amendments and Waivers ...................................      14
</TABLE>
<PAGE>   3
<TABLE>
<S>                                                                         <C>
         (c)  Notices ..................................................      14

         (d)  Merger, Amalgamation or Consolidation of the Company .....      16

         (e)  Successors and Assigns ...................................      17

         (f)  Counterparts .............................................      17

         (g)  Titles and Subtitles .....................................      17

         (h)  Governing Law ............................................      17

         (i)  Separability .............................................      17

         (j)  Entire Agreement .........................................      17

         (k)  Submission to Jurisdiction ...............................      17
</TABLE>
<PAGE>   4
                  THIS REGISTRATION RIGHTS AGREEMENT (this "Agreement") is made
and entered into as of November 24, 1999, by and among GLOBAL CROSSING LTD., a
company organized under the laws of Bermuda ("Global Crossing"), SOFTBANK CORP.,
a Japanese corporation ("Softbank"), MICROSOFT CORPORATION, a Washington
corporation ("Microsoft"), THE GOLDMAN SACHS GROUP, INC., a Delaware
corporation, ("Goldman Sachs"), ASIA GLOBAL CROSSING LTD., a company organized
under the laws of Bermuda (the "Company") and each other person who becomes a
Holder (as defined below) hereunder.

                                    RECITALS

                  WHEREAS, pursuant to a Subscription and Shareholders Agreement
dated September 8, 1999 among Global Crossing, Softbank, Microsoft, Goldman
Sachs, and Asia Global Crossing Holdings Ltd. ("Asia Global Crossing") (the
"Subscription and Shareholders Agreement"), Global Crossing, Softbank, Microsoft
and Goldman Sachs are acquiring indirectly, through the acquisition of common
shares of Asia Global Crossing, common shares of the Company, par value 0.01 per
share ("Common Shares");

                  WHEREAS, to induce Global Crossing, Microsoft, Softbank and
Goldman Sachs to execute and deliver the Subscription and Shareholders
Agreement, the Company has agreed to provide to the Holders (as defined below)
certain registration rights under the Securities Act; and

                  WHEREAS, the execution and delivery of this Agreement by the
parties hereto is a condition to the closing of the transactions contemplated by
the Subscription and Shareholders Agreement.

                  NOW, THEREFORE, in consideration of the mutual promises and
agreements set forth herein and in the Subscription and Shareholders Agreement,
and other valuable consideration, the receipt and sufficiency of which is hereby
acknowledged, the parties hereto hereby agree as follows:

         Section 1. Definitions. For purposes of this Agreement, the following
capitalized terms have the following meanings:

                  "Common Shares": the Common Shares of the Company, par value
$0.01 per share.

                  "Exchange Act": The United States Securities Exchange Act of
1934, as amended, and the rules and regulations promulgated thereunder, all as
the same shall be in effect from time to time.

                  "Holders": each of Global Crossing, Softbank, Microsoft,
Goldman Sachs and each of their transferees who agree to be bound by the
provisions of this Agreement in accordance with Section 8(e) hereof.
<PAGE>   5
                  "Initial Public Offering": the initial Underwritten Offering
of Common Shares of the Company, registered with the SEC, and listing of the
Common Shares on a United States securities exchange or admitted for quotation
on an inter-dealer quotation system operated by the National Association of
Security Dealers, Inc.

                  "Person": means any individual, firm, corporation,
partnership, limited liability company, trust, joint venture, governmental
authority or other entity.

                  "Prospectus": The prospectus included in any Registration
Statement (including, without limitation, a prospectus that discloses
information previously omitted from a prospectus filed as part of an effective
registration statement in reliance upon Rule 430A under the Securities Act), as
amended or supplemented by any prospectus supplement, with respect to the terms
of the offering of any portion of the Registrable Securities covered by such
Registration Statement and all other amendments and supplements to such
prospectus, including post-effective amendments, and all material incorporated
by reference or deemed to be incorporated by reference in such prospectus.

                  "Registrable Securities": All Common Shares held from time to
time by the Holders and any Conversion Securities as defined in Section 8(d).

                  "Registration Statement": Any registration statement of the
Company under the Securities Act that covers any of the Registrable Securities
pursuant to the provisions of this Agreement, including the related Prospectus,
any preliminary prospectus, all amendments and supplements to such registration
statement (including post-effective amendments), all exhibits and all material
incorporated by reference or deemed to be incorporated by reference in such
registration statement.

                  "SEC":  The United States Securities and Exchange Commission.

                  "Securities Act": The United States Securities Act of 1933, as
amended, and the rules and regulations promulgated thereunder, all as the same
shall be in effect from time to time.

                  "Underwritten Offering": A distribution, registered pursuant
to the Securities Act, in which securities of the Company are sold to the public
through one or more underwriters.

                  Unless otherwise defined herein, terms defined in the
Subscription and Shareholders Agreement are used herein as therein defined.

         Section 2. Demand Registration.

                  (a) Requests for Registration . At any time after an Initial
Public Offering and the termination of any restrictions on the sale of Common
Shares required by the underwriters in such Initial Public Offering and
subsequent to the relevant Holder becoming a direct Holder of Common Shares, and
subject to the conditions set forth in this Agreement: (i) each of Softbank,
Microsoft and Global Crossing (and their respective transferees) will have the
right, by written notice delivered to the Company (a "Demand Notice"), to
require the Company to register Registrable Securities under

                                       2
<PAGE>   6
and in accordance with the provisions of the Securities Act (a "Demand
Registration"); provided that each of Softbank (and its transferees) and
Microsoft (and its transferees) may not make more than two (2) Demand
Registrations and each of Softbank, Microsoft and Global Crossing must provide
to the Company a certificate (the "Authorizing Certificate") signed by the
Holders of at least 50% of the Common Shares held by it and its transferees on
the date of such Demand Notice; and provided, further, that no Demand Notice may
be given prior to six (6) months after the effective date of the immediately
preceding Demand Registration. The Authorizing Certificate shall set forth (A)
the name of the Holder or Holders signing such Authorizing Certificate, (B) the
number of Registrable Securities held by such Holder or Holders, and, if
different, the number of Registrable Securities such Holder or Holders have
elected to have registered, and (C) the intended methods of disposition of the
Registrable Securities. A Holder may at its option withdraw Registrable
Securities from a registration. In such event (1) any continuing registration of
Registrable Securities shall constitute the Demand Registration to which such
Holder is entitled and (2) the withdrawing Holder shall reimburse the Company
for any registration and filing fees (including any fees payable to the SEC, the
National Association of Securities Dealers, Inc. or any successor organization)
it has incurred with respect to the withdrawn Registrable Securities (unless all
Registrable Securities are withdrawn, in which case the withdrawing Holder(s)
shall reimburse the Company for all costs and expenses incurred by it in
connection with the registration of such Registrable Securities). Subject to
compliance with clause (2) of the preceding sentence, a registration that is
terminated in its entirety prior to the effective date of the applicable
Registration Statement will not constitute a Demand Registration.

                  If a Demand Registration is not declared and maintained
effective for the period required by Section 2(b) or if the consummation of the
offering of Registrable Securities pursuant to such Demand Registration is
interfered with by any stop order, injunction or other order or requirement of
the SEC or other governmental agency or court which is not due to the act or
omission of any Holder, then the Holders shall be entitled to an additional
Demand Registration in lieu thereof.

                  (b) Filing and Effectiveness. (i) The Company will file a
Registration Statement relating to any Demand Registration as promptly as
practicable (but in any event within 60 days in the case of a registration made
on Form S-1 or F-1, or a comparable successor form, as applicable, or 45 days in
the case of any registration eligible to be made on Form S-3 of F-3 or a
comparable successor form, as applicable) following the date on which the Demand
Notice is given and will use its reasonable best efforts to cause the same to be
declared effective by the SEC as soon as practicable thereafter, but in any
event within 90 days thereafter (the "Effectiveness Date").

                  (ii) The Company agrees to use its best efforts to comply with
all necessary provisions of the federal securities laws in order to keep each
Registration Statement relating to a Demand Registration effective for a period
of six (6) months from its Effectiveness Date or such shorter period that will
terminate when all Registrable Securities covered by such Registration Statement
have been sold pursuant to such Registration Statement.

                  Within ten (10) business days after receipt of such Demand
Notice, the Company will serve written notice thereof (the "Notice") to all
other Holders and will, subject to the provisions of Section 2(c), include in
any registration required under this Section 2 all Registrable Securities with

                                       3
<PAGE>   7
respect to which the Company receives written requests for inclusion therein
within fifteen (15) business days after such Notice to given to the applicable
Holder. The Holder will be permitted, subject to its compliance with the
provisions of Section 2(a) relating to reimbursement of the Company's expenses,
to withdraw in good faith all or part of the Registrable Securities from a
Demand Registration at any time prior to the effective date of such Demand
Registration, in which event the Company will promptly amend or, if applicable,
withdraw the related Registration Statement.

                  (c) Priority on Demand Registration. Notwithstanding the
foregoing, if the managing underwriter or underwriters of an Underwritten
Offering to which such Demand Registration relates advises the Holders that the
total amount of Registrable Securities that such Holders intend to include in
such Demand Registration is in the aggregate such as to materially and adversely
affect the success of such offering, then the number of Registrable Securities
to be included in such Demand Registration will, if necessary, be reduced and
there will be included in such Underwritten Offering the largest number of
Registrable Securities that, in the opinion of such managing underwriter or
underwriters, can be sold without materially and adversely affecting the success
of such Underwritten Offering. The Registrable Securities of the Holder or
Holders initiating the Demand Registration shall receive priority in such
Underwritten Offering to the full extent of the Registrable Securities such
Holder or Holders desire to sell (unless these securities would materially and
adversely affect the success of such offering, in which case the number of such
Holder's Registrable Securities included in the offering shall be reduced to the
extent necessary) and the remaining allocation available for sale, if any, shall
be allocated pro rata among the other Holders on the basis of the number of
Registrable Securities requested to be included therein by each such Holder.

                  (d) Postponement of Demand Registration. Notwithstanding
anything to the contrary in any other provision of this Agreement, the Company
will be entitled, on no more than one occasion in any 180 day period, to
postpone the filing period of any Demand Registration for a reasonable period of
time not in excess of 60 calendar days if the Board of Directors of the Company
determines, in the good faith exercise of its business judgment, and has
delivered to the Holders written certification to the effect, that such
registration and offering could materially interfere with a bona fide financing
transaction of the Company, including without limitation a primary offering of
securities, or any other material business transaction of the Company, or would
require disclosure of information, the premature disclosure of which could
materially and adversely affect the Company. If the Company postpones the filing
of a Registration Statement, it will promptly notify the Holders in writing when
the events or circumstances permitting such postponement have ended.

         Section 3. Piggyback Registration.

                  (a) Right to Piggyback. If at any time the Company proposes
to file a Registration Statement, whether or not for sale for the Company's own
account, on a form and in a manner that would also permit registration of
Registrable Securities (other than in connection with a registration statement
on Forms S-4 or S-8 or any similar or successor form), the Company shall give to
Holders holding Registrable Securities written notice of such proposed filing at
least thirty (30) days before the anticipated filing. The notice referred to in
the preceding sentence shall offer Holders the

                                       4
<PAGE>   8
opportunity to register such amount of Registrable Securities as each Holder may
request (a "Piggyback Registration"). Subject to Section 3(b), the Company will
include in each such Piggyback Registration (and any related qualification under
state blue sky laws and other compliance filings, and in any underwriting
involved therein) all Registrable Securities with respect to which the Company
has received written requests for inclusion therein within fifteen (15) days
after the written notice from the Company is given. Each Holder will be
permitted, subject to its compliance with the provisions of Section 2(a)
relating to reimbursement of the Company's expenses, to withdraw all or part of
its Registrable Securities from a Piggyback Registration at any time prior to
the effective date of such Piggyback Registration.

                  Notwithstanding the foregoing, the Company will not be
obligated to effect any registration of Registrable Securities under this
Section 3 as a result of the registration of any of its securities solely as
direct consideration for mergers or acquisitions or offered solely in connection
with exchange offers, dividend reinvestment and share purchase plans, rights
offerings or option or other employee benefit plans.

                  (b) Priority on Piggyback Registrations. The Company will
cause the managing underwriter or underwriters of a proposed Underwritten
Offering to permit Holders holding Registrable Securities requested to be
included in the registration for such offering to include therein all such
Registrable Securities requested to be so included (such securities, together
with any other shares of the same class requested to be included in such
registration by any other Person pursuant to similar registration rights, the
"Piggyback Shares") on the same terms and conditions as any securities of the
Company included therein (other than the indemnification by the Holders, which
will be limited as set forth in Section 6(b) hereof and provided, that the
Holders give customary representations and warranties). The Company shall
cooperate with any such Holder of Registrable Securities in order to limit any
representations and warranties to, or agreements with, the Company or the
underwriters to be made by such Holder only to those representations, warranties
or agreements regarding such Holder, such Holder's Registrable Securities and
such Holder's intended method of distribution and any other representation
required by law. Notwithstanding the foregoing, if the managing underwriter or
underwriters of such Underwritten Offering advises the Holders to the effect
that the total amount of securities that such Holders, the Company and any other
Person propose to include in such Underwritten Offering is such as to materially
and adversely affect the success of such offering, then the Company will include
in such registration:

                            (x) in the case of a registration in connection with
         a sale of securities for the Company's own account, (i) first, 100% of
         the securities that the Company proposes to sell for its own account,
         and (ii) second, to the extent that the number of securities in clause
         (i) above is less than the number of securities which the Company has
         been advised can be sold in such offering without having the adverse
         effect referred to above, the number of Piggyback Shares of each Holder
         and the number of Piggyback Shares requested to be included in such
         offering by any other Persons pursuant to similar registration rights,
         determined pro rata on the basis of the number of shares of the class
         being sold owned by each Holder requesting registration and such other
         Persons requesting registration, collectively; and

                                       5
<PAGE>   9
                           (y) in the case of a registration in connection with
         a sale of securities on account of any Person other than the Company
         (the "Initiating Party"), other than a Demand Registration, (i) first,
         100% of the securities, if any, that the Initiating Party proposes to
         sell, (ii) second, to the extent that the number of securities in
         clause (i) above is less than the number of securities which the
         Company has been advised can be sold in such offering without having
         the adverse effect referred to above, the number of Piggyback Shares of
         each Holder and the number of Piggyback Shares requested to be included
         in such offering by any other Persons pursuant to similar registration
         rights, determined pro rata on the basis of the number of shares of the
         class being sold owned by each Holder requesting registration and such
         other Persons requesting registration, collectively, and (iii) third,
         to the extent that the number of securities in clauses (i) and (ii)
         above is less than the number of securities which the Company has been
         advised can be sold in such offering without having the adverse effect
         referred to above, the securities sought to be included by the Company
         in the offering.

         Section 4. Registration Procedures. In connection with the Company's
registration obligations pursuant to Sections 2 and 3, the Company will effect
such registrations to permit the sale of such Registrable Securities in
accordance with the intended method or methods of disposition thereof, and
pursuant thereto the Company will as expeditiously as possible, and in each case
to the extent applicable (it being understood that the obligations of the
Company in clauses (a), (b), (d), (h), (j), (k), (l) and (n) of this Section 4
will be subject to the first sentence of Section 3(b) and, except as provided in
Section 3(b), the Holders will not have any right to effect an underwritten
public offering under Section 3):

                  (a) Prepare and file with the SEC a Registration Statement or
         Registration Statements on any appropriate form under the Securities
         Act available for the sale of the Registrable Securities by the holders
         thereof in accordance with the intended method or methods of
         distribution thereof, and cause each such Registration Statement to
         become effective and remain effective as provided herein; provided,
         however, that before filing a Registration Statement or Prospectus or
         any amendments or supplements thereto (including documents that would
         be incorporated or deemed to be incorporated therein by reference) the
         Company will furnish to the Holders holding Registrable Securities
         covered by such Registration Statement, not more than one counsel
         chosen by Holders holding a majority of the Registrable Securities
         being registered ("Special Counsel") and the managing underwriters, if
         any, copies of all such documents proposed to be filed, which documents
         will be subject to the review of such Holders, such Special Counsel and
         such underwriters, and the Company will not file any such Registration
         Statement or amendment thereto or any Prospectus or any supplement
         thereto (excluding such documents that, upon filing, will be
         incorporated or deemed to be incorporated by reference therein) to
         which the Holders holding a majority of the Registrable Securities
         covered by such Registration Statement or the managing underwriter, if
         any, shall reasonably object.

                  (b) Prepare and file with the SEC such amendments and
         post-effective amendments to each Registration Statement as may be
         necessary to keep such Registration Statement continuously effective
         for the applicable periods specified in Section 2; cause the related
         Prospectus to be supplemented by any required Prospectus supplement,
         and as so supplemented to be filed pursuant to Rule 424 (or any similar
         provisions then in force) under

                                       6
<PAGE>   10
         the Securities Act; and comply with the provisions of the Securities
         Act with respect to the disposition of all securities covered by such
         Registration Statement during the applicable period in accordance with
         the intended methods of disposition by the sellers thereof set forth in
         such Registration Statement as so amended or in such Prospectus as so
         supplemented.

                  (c) Notify the selling Holders and the managing underwriters,
         if any, promptly, and (if requested by any such Person) confirm such
         notice in writing, (i) when a Prospectus or any Prospectus supplement
         or post-effective amendment has been filed, and, with respect to a
         Registration Statement or any post-effective amendment, when the same
         has become effective, (ii) of any request by the SEC or any other
         federal or state governmental authority for amendments or supplements
         to a Registration Statement or related Prospectus or for additional
         information, (iii) of the issuance by the SEC or any other federal or
         state governmental authority of any stop order suspending the
         effectiveness of a Registration Statement or the initiation of any
         proceedings for that purpose, (iv) if at any time the representations
         and warranties of the Company contained in any agreement contemplated
         by Section 4(n) (including any underwriting agreement) cease to be true
         and correct in any material respect, (v) of the receipt by the Company
         of any notification with respect to the suspension of the qualification
         or exemption from qualification of any of the Registrable Securities
         for sale in any jurisdiction or the initiation or threatening of any
         proceeding for such purpose, (vi) of the occurrence of any event that
         makes any statement made in such Registration Statement or related
         Prospectus or any document incorporated or deemed to be incorporated
         therein by reference untrue in any material respect or that requires
         the making of any changes in a Registration Statement, Prospectus or
         any such document so that, in the case of the Registration Statement,
         it will not contain any untrue statement of a material fact or omit to
         state any material fact required to be stated therein or necessary to
         make the statements therein not misleading and, in the case of the
         Prospectus, it will not contain any untrue statement of a material fact
         or omit to state any material fact required to be stated or necessary
         to make the statements therein, in light of the circumstances under
         which they were made, not misleading, and (vii) of the Company's
         reasonable determination that a post-effective amendment to a
         Registration Statement would be appropriate.

                  (d) Use its reasonable best efforts to obtain the withdrawal
         of any order suspending the effectiveness of a Registration Statement,
         or the lifting of any suspension of the qualification (or exemption
         from qualification) of any of the Registrable Securities for sale in
         any jurisdiction, at the earliest possible moment.

                  (e) If requested by the managing underwriters, if any, or
         Holders holding a majority of the Registrable Securities being
         registered, (i) promptly incorporate in a Prospectus supplement or
         post-effective amendment such information as the managing underwriters,
         if any, and such Holders agree should be included therein as may be
         required by applicable law and (ii) make all required filings of such
         Prospectus supplement or such post-effective amendment as soon as
         practicable after the Company has received notification of the matters
         to be incorporated in such Prospectus supplement or post-effective
         amendment; provided, however, that the Company will not be required to
         take any actions under this Section 4(e) that are not, in the opinion
         of counsel for the Company, in compliance with applicable law.

                                       7
<PAGE>   11
                  (f) Furnish to each selling Holder and each managing
         underwriter, if any, without charge, at least one conformed copy of the
         Registration Statement and any post-effective amendment thereto (but
         excluding schedules, all documents incorporated or deemed incorporated
         therein by reference and all exhibits, unless requested in writing by
         such Holder or underwriter).

                  (g) Deliver to each selling Holder and the underwriters, if
         any, without charge as many copies of the Prospectus or Prospectuses
         relating to such Registrable Securities (including each preliminary
         prospectus) and any amendment or supplement thereto as such persons may
         reasonably request; and, subject to the last paragraph of this Section
         4, the Company hereby consents to the use of such Prospectus or each
         amendment or supplement thereto by each of the selling Holders and the
         underwriters, if any, in connection with the offering and sale of the
         Registrable Securities covered by such Prospectus or any amendment or
         supplement thereto.

                  (h) Prior to any public offering of Registrable Securities, to
         register or qualify or cooperate with the selling Holders, the
         underwriters, if any, and their respective counsel in connection with
         the registration or qualification (or exemption from such registration
         or qualification) of such Registrable Securities for offer and sale
         under the securities or blue sky laws of such jurisdictions within the
         United States as any seller or underwriter reasonably requests in
         writing; use all reasonable efforts to keep such registration or
         qualification (or exemption therefrom) effective during the period the
         applicable Registration Statement is required to be kept effective and
         do any and all other acts or things necessary or advisable to enable
         the disposition in each such jurisdiction of the Registrable Securities
         covered by the applicable Registration Statement; provided, however,
         that the Company will not be required to (i) qualify to do business in
         any jurisdiction where it is not then so qualified or (ii) take any
         action that would subject it to taxation or service of process in any
         such jurisdiction where it is not then so subject.

                  (i) Cooperate with the selling Holders and the managing
         underwriters, if any, to facilitate the timely preparation and delivery
         of certificates representing Registrable Securities to be sold and
         enable such Registrable Securities to be in such denominations and
         registered in such names as the managing underwriters, if any, shall
         request at least two business days prior to any sale of Registrable
         Securities to the underwriters.

                  (j) Use its reasonable best efforts to cause the Registrable
         Securities covered by the applicable Registration Statement to be
         registered with or approved by such other governmental agencies or
         authorities within the United States except as may be required solely
         as a consequence of the nature of any selling Holder's business, in
         which case the Company will cooperate in all reasonable respects with
         the filing of such Registration Statement and the granting of such
         approvals as may be necessary to enable the seller or sellers thereof
         or the underwriters, if any, to consummate the disposition of such
         Registrable Securities.

                  (k) Upon the occurrence of any event contemplated by Section
         4(c)(vi) or 4(c)(vii), prepare a supplement or post-effective amendment
         to each Registration Statement

                                       8
<PAGE>   12
         or a supplement to the related Prospectus or any document incorporated
         therein by reference or file any other required document so that, as
         thereafter delivered to the purchasers of the Registrable Securities
         being sold thereunder, such Prospectus will not contain an untrue
         statement of a material fact or omit to state a material fact required
         to be stated therein or necessary to make the statements therein, in
         light of the circumstances under which they were made, not misleading.

                  (l) If requested by Holders holding a majority of the
         Registrable Securities covered by such Registration Statement or the
         managing underwriters, if any, use its best efforts to cause all
         Registrable Securities covered by such Registration Statement to be (i)
         listed on each securities exchange, if any, on which securities issued
         by the Company of the same class are then listed or, if no such
         securities issued by the Company are then so listed, on the New York
         Stock Exchange or another national securities exchange if the
         securities qualify to be so listed or (ii) authorized to be quoted on
         the National Association of Securities Dealers Automated Quotation
         System ("Nasdaq") or the National Market System of Nasdaq, if the
         securities qualify to be so quoted.

                  (m) As needed, (i) engage an appropriate transfer agent and
         provide the transfer agent with printed certificates for the
         Registrable Securities in a form eligible for deposit with The
         Depository Trust Company and (ii) provide a CUSIP number for the
         Registrable Securities.

                  (n) Enter into such customary agreements (including, in the
         event of an Underwritten Offering, an underwriting agreement in form,
         scope and substance as is customary in underwritten offerings) and take
         all such other commercially reasonable and customary actions in
         connection therewith (including those reasonably requested by the
         Holders holding a majority of the Registrable Securities being sold or,
         in the event of an Underwritten Offering, those reasonably requested by
         the managing underwriters) in order to facilitate the disposition of
         such Registrable Securities and in such connection, but only where an
         underwriting agreement is entered into in connection with an
         Underwritten Offering, (i) make such representations and warranties to
         the underwriters with respect to the businesses of the Company and its
         subsidiaries, the Registration Statement, Prospectus and documents
         incorporated by reference or deemed incorporated by reference therein,
         if any, in each case, in form, substance and scope as are customarily
         made by issuers to underwriters in underwritten offerings and confirm
         the same if and when requested; (ii) obtain opinions of counsel to the
         Company and updates thereof, which counsel and opinions (in form, scope
         and substance) shall be reasonably satisfactory to the managing
         underwriters, if any, addressed to each of the underwriters covering
         the matters customarily covered in opinions requested in underwritten
         offerings and such other matters as may be reasonably requested by such
         underwriters; (iii) obtain "comfort" letters and updates thereof from
         the independent certified public accountants of the Company (and, if
         necessary, any other certified public accountants of any subsidiary of
         the Company or of any business acquired by the Company for which
         financial statements and financial data is, or is required to be,
         included in the Registration Statement), addressed to each of the
         underwriters, such letters to be in customary form and covering matters
         of the type customarily covered in "comfort" letters in connection with
         underwritten offerings; (iv) cause the Company's management to be made

                                       9
<PAGE>   13
         available for, and assist in, the marketing and disposition of such
         Registrable Securities in the manner and to the extent reasonably
         requested by the underwriters including, without limitation,
         participation by management in customary road shows, investor
         conferences and other similar presentations and (v) deliver such
         documents and certificates as may be reasonably requested by the
         managing underwriters, if any, to evidence the continued validity of
         the representations and warranties of the Company and its subsidiaries
         made pursuant to clause (i) above and to evidence compliance with any
         customary conditions contained in the underwriting agreement entered
         into by the Company. The foregoing actions will be taken in connection
         with each closing under such underwriting agreement as and to the
         extent required thereunder.

                  (o) Make available for reasonable inspection during normal
         business hours by a representative of the Holders holding Registrable
         Securities being sold, any underwriter participating in any disposition
         of Registrable Securities, and any attorney or accountant retained by
         such selling Holders or underwriter, all financial and other records,
         pertinent corporate documents and properties of the Company and its
         subsidiaries, and cause the officers, directors and employees of the
         Company and its subsidiaries to supply all information reasonably
         requested by any such representative, underwriter, attorney or
         accountant in connection with such Registration Statement; provided,
         however, that any records, information or documents that are designated
         by the Company in writing as confidential at the time of delivery of
         such records, information or documents will be kept confidential by
         such Persons unless (i) such records, information or documents are in
         the public domain or otherwise publicly available, (ii) disclosure of
         such records, information or documents is required by court or
         administrative order; provided, that such Holder notifies the Company
         of any such requirement and cooperates with the Company in seeking a
         protective or restraining order limiting such disclosure, or (iii)
         disclosure of such records, information or documents, in the reasonable
         opinion of counsel to such Person, is otherwise required by law
         (including, without limitation, pursuant to the requirements of the
         Securities Act).

                  (p) Comply with all applicable rules and regulations of the
         SEC and make generally available to its security holders earnings
         statements satisfying the provisions of Section 11(a) of the Securities
         Act and Rule 158 thereunder (or any similar rule promulgated under the
         Securities Act) no later than 45 calendar days after the end of any
         12-month period (or 90 calendar days after the end of any 12-month
         period if such period is a fiscal year) (i) commencing at the end of
         any fiscal quarter in which Registrable Securities are sold to
         underwriters in a firm commitment or best efforts Underwritten
         Offering, or (ii) if not sold to underwriters in such an offering,
         commencing on the first day of the first fiscal quarter of the Company,
         after the effective date of a Registration Statement, which statements
         shall cover such 12-month period.

                  The Company may require each seller of Registrable Securities
as to which any registration is being effected to furnish to the Company such
information regarding the distribution of such Registrable Securities as the
Company may, from time to time, reasonably request in writing, and the Company
may exclude from such registration the Registrable Securities of any seller who
unreasonably fails to furnish such information within a reasonable time after
receiving such request.

                                       10
<PAGE>   14
                  Each Holder will be deemed to have agreed by virtue of its
acquisition of Registrable Securities that, upon receipt of any notice from the
Company of the occurrence of any event of the kind described in Section
4(c)(ii), 4(c)(iii), 4(c)(v), 4(c)(vi) or 4(c)(vii) ("Suspension Notice"), such
Holder will forthwith discontinue disposition of such Registrable Securities
covered by such Registration Statement or Prospectus (a "Black-Out") until such
Holder's receipt of the copies of the supplemented or amended Prospectus
contemplated by Section 4(k), or until it is advised in writing (the "Advice")
by the Company that the use of the applicable Prospectus may be resumed, and
such Holder has received copies of any additional or supplemental filings that
are incorporated or deemed to be incorporated by reference in such Prospectus.
Except as expressly provided herein, there shall be no limitation with regard to
the number of Suspension Notices that the Company is entitled to give hereunder;
provided, however, that in no event shall the aggregate number of days the
Holders are subject to Black-Out during any period of 12 consecutive months
exceed 180 days.

         Section 5. Registration Expenses. Except as provided in Section 2(a)
and Section 9, all fees and expenses incident to the performance of or
compliance with this Agreement by the Company will be borne by the Company
whether or not any of the Registration Statements become effective. Such fees
and expenses will include, without limitation, (i) all registration and filing
fees (including fees and expenses for compliance with federal or state
securities laws or state "blue sky" laws), (ii) printing expenses (including,
without limitation, expenses of printing certificates for Registrable Securities
in a form eligible for deposit with The Depository Trust Company and of printing
a reasonable number of prospectuses if the printing of such prospectuses is
requested by the Holders holding a majority of the Registrable Securities
included in any Registration Statement), (iii) messenger, telephone and delivery
expenses incurred by the Company, (iv) fees and disbursements of counsel for the
Company incurred by the Company, (v) fees and disbursements of all independent
certified public accountants referred to in Section 4(n)(iii) (including the
expenses of any special audit and "comfort" letter required by or incident to
such performance) incurred by the Company, and (vi) reasonable fees and expenses
of Special Counsel retained by the Holders in connection with the registration
and sale of their Registrable Securities (which counsel will be selected by the
Holders of a majority of the Registrable Securities being sold); provided,
however, that the Company shall not pay any such fees and expenses of Special
Counsel which exceed $200,000 in the aggregate for all Registration Statements.
In addition, the Company will pay internal expenses (including without
limitation all salaries and expenses of its officers and employees performing
legal or accounting duties), the expense of any annual audit, the fees and
expenses incurred in connection with the listing of the securities to be
registered on any securities exchange on which securities of the same class
issued by the Company are then listed or for admission of any securities for
quotation or an inter-dealer quotation system, as applied and the fees and
expenses of any Person, including special experts, retained by the Company. In
no event, however, will the Company be responsible for any underwriting discount
or selling commission with respect to any sale of Registrable Securities
pursuant to this Agreement, and the Holders shall be responsible on a pro rata
basis for any taxes of any kind (including, without limitation, transfer taxes)
with respect to any disposition, sale or transfer of Registrable Securities and
for any legal, accounting and other expenses incurred by them, except as
provided above with respect to Special Counsel, in connection with any
Registration Statement.

                                       11
<PAGE>   15
         Section 6.  Indemnification.

                  (a) Indemnification by the Company. The Company will indemnify
and hold harmless, to the fullest extent permitted by law, each Holder holding
Registrable Securities registered pursuant to this Agreement, the officers,
directors and agents and employees of each of them, each Person who controls
such a Holder (within the meaning of Section 15 of the Securities Act or Section
20 of the Exchange Act) and the officers, directors, agents and employees of any
such controlling person, from and against all losses, claims, damages,
liabilities, costs (including without limitation the costs of investigation and
attorneys' fees) and expenses (collectively, "Losses"), arising out of or based
upon any untrue or alleged untrue statement of a material fact contained in any
Registration Statement, Prospectus or form of Prospectus or in any amendment or
supplement thereto or in any preliminary prospectus, or arising out of or based
upon any omission or alleged omission to state therein a material fact required
to be stated therein or necessary to make the statements therein not misleading,
except insofar and to the extent as the same are based upon information
furnished in writing to the Company by such Holder specifically for use therein.

                  (b) Indemnification by Holders. In connection with any
Registration Statement in which a Holder is participating, such Holder will
furnish to the Company in writing such information as the Company reasonably
requests for use in connection with any Registration Statement, Prospectus or
preliminary prospectus and will indemnify and hold harmless, to the fullest
extent permitted by law, the Company, its directors and officers, agents and
employees, each person who controls the Company (within the meaning of Section
15 of the Securities Act and Section 20 of the Exchange Act), and the directors,
officers, agents or employees of such controlling persons, from and against all
Losses arising out of or based upon any untrue statement of a material fact
contained in any Registration Statement, Prospectus or preliminary prospectus or
arising out of or based upon any omission of a material fact required to be
stated therein or necessary to make the statements therein not misleading, to
the extent, but only to the extent, that such untrue statement or omission is
contained in any information so furnished in writing by such Holder to the
Company specifically for use in such Registration Statement, Prospectus or
preliminary prospectus and was relied upon by the Company in the preparation of
such Registration Statement, Prospectus or preliminary prospectus. In no event
will the liability of any selling Holder hereunder be greater in amount than the
dollar amount of the proceeds received by such Holder upon the sale of the
Registrable Securities giving rise to such indemnification obligation.

                  (c) Conduct of Indemnification Proceedings. If any person
shall become entitled to indemnity hereunder (an "indemnified party"), such
indemnified party shall give prompt notice to the party from which such
indemnity is sought (the "indemnifying party") of any claim or of the
commencement of any action or proceeding with respect to which such indemnified
party seeks indemnification or contribution pursuant hereto; provided, however,
that the failure to so notify the indemnifying party will not relieve the
indemnifying party from any obligation or liability except to the extent that
the indemnifying party has been prejudiced materially by such failure. All
reasonable fees and expenses (including any reasonable fees and expenses
incurred in connection with investigating or preparing to defend such action or
proceeding) will be paid to the indemnified party (provided appropriate
documentation for such expenses is also submitted with such notice), as
incurred, within five calendar days of written notice thereof to the
indemnifying party (regardless of whether it is ultimately determined that an
indemnified party is not entitled to indemnification

                                       12
<PAGE>   16
hereunder). The indemnifying party will not consent to entry of any judgment or
enter into any settlement or otherwise seek to terminate any action or
proceeding in which any indemnified party is or could be a party and as to which
indemnification or contribution could be sought by such indemnified party under
this Section 6, unless such judgment, settlement or other termination includes
as an unconditional term thereof the giving by the claimant or plaintiff to such
indemnified party of a release, in form and substance reasonably satisfactory to
the indemnified party, from all liability in respect of such claim or litigation
for which such indemnified party would be entitled to indemnification hereunder.

                  (d) Contribution. If the indemnification provided for in this
Section 6 is unavailable to an indemnified party under Section 6(a) or 6(b) in
respect of any Losses or is insufficient to hold such indemnified party
harmless, then each applicable indemnifying party, in lieu of indemnifying such
indemnified party, will, severally but not jointly, contribute to the amount
paid or payable by such indemnified party as a result of such Losses, in such
proportion as is appropriate to reflect the relative fault of the indemnifying
party or indemnifying parties, on the one hand, and such indemnified party, on
the other hand, in connection with the actions, statements or omissions that
resulted in such Losses as well as any other relevant equitable considerations.
The relative fault of such indemnifying party or indemnifying parties, on the
one hand, and such indemnified party, on the other hand, will be determined by
reference to, among other things, whether any action in question, including any
untrue or alleged untrue statement of a material fact or omission or alleged
omission of a material fact, has been taken or made by, or related to
information supplied by, such indemnifying party or indemnified party, and the
parties' relative intent, knowledge, access to information and opportunity to
correct or prevent such action, statement or omission. The amount paid or
payable by a party as a result of any Losses will be deemed to include any legal
or other fees or expenses incurred by such party in connection with any action
or proceeding.

                  The parties hereto agree that it would not be just and
equitable if contribution pursuant to this Section 6(d) were determined by pro
rata allocation or by any other method of allocation that does not take into
account the equitable considerations referred to in the immediately preceding
paragraph. Notwithstanding the provisions of this Section 6(d), an indemnifying
party that is a selling Holder will not be required to contribute any amount in
excess of the amount by which the total price at which the Registrable
Securities sold by such indemnifying party and distributed to the public were
offered to the public exceeds the amount of any damages that such indemnifying
party has otherwise been required to pay by reason of such untrue or alleged
untrue statement or omission or alleged omission. No person guilty of fraudulent
misrepresentation (within the meaning of Section 11(f) of the Securities Act)
will be entitled to contribution from any person who was not guilty of such
fraudulent misrepresentation.

                  The indemnity, contribution and expense reimbursement
obligations of the Company hereunder will be in addition to any liability the
Company may otherwise have hereunder or otherwise. The provisions of this
Section 6 will survive so long as Registrable Securities remain outstanding,
notwithstanding any permitted transfer of the Registrable Securities by any
Holder thereof or any termination of this Agreement.

         Section 7. Underwritten Registrations. If any of the Registrable
Securities included in any Demand Registration are to be sold in an Underwritten
Offering, the Holders holding a majority of

                                       13
<PAGE>   17
the Registrable Securities included in the Demand Notice may select an
investment banker or investment bankers and manager or managers to manage the
Underwritten Offering, provided that such investment banker or bankers is (are)
reasonably acceptable to the Company. If any Piggyback Registration is an
Underwritten Offering, the Company will have the exclusive right to select the
investment banker or investment bankers and managers to administer the offering.
The Company and the Holders agree that, in connection with any Underwritten
Offering hereunder, they shall each undertake to offer customary
indemnification, representations and warranties to the participating
underwriters and to agree to any restrictions required by the underwriters on
the sale of Common Shares or other securities by such party after the completion
of the Underwritten Offering; provided, however, that (i) the period of such
restrictions shall not exceed 180 days (in the case of the Initial Public
Offering) or 90 days (in the case of a subsequent Underwritten Offering) and
(ii) the restrictions so imposed on the Holders shall be no more onerous than
the restrictions imposed on Global Crossing.

         Section 8.  Miscellaneous.

                  (a) Remedies. In the event of a breach by a party of its
obligations under this Agreement, each other party, in addition to being
entitled to exercise all rights granted by law, including recovery of damages,
will be entitled to specific performance of its rights under this Agreement.
Each party agrees that monetary damages would not be adequate compensation for
any loss incurred by reason of a breach by it of any provision of this Agreement
and hereby further agrees that, in the event of any action for specific
performance in respect of such breach, it will waive the defense that a remedy
at law would be adequate.

                  (b) Amendments and Waivers. The provisions of this Agreement
may not be amended, modified or supplemented without the prior written consent
of the Company, Holders holding in excess of 50% of the Registrable Securities
held by Softbank and its transferees and Holders holding in excess of 50% of the
Registrable Securities held by Microsoft and its transferees. No amendment that
materially adversely affects any particular Holder may be effected to this
Agreement without the consent of such Holder.

                  (c) Notices. All notices required or permitted hereunder shall
be in writing and shall be deemed effectively given: (i) upon personal delivery
to the party to be notified; (ii) when sent by confirmed telex or facsimile if
sent during normal business hours of the recipient, if not, then on the next
business day; (iii) upon delivery if sent by registered or certified mail,
return receipt requested, postage prepaid; or (iv) upon delivery if deposited
with a nationally recognized overnight courier, specifying next day delivery,
with written verification of receipt. All communications shall be sent to the
parties at the following addresses (or at such other address for a party as
shall be specified by like notice):

         If to the Company to:

                  Asia Global Crossing Ltd.
                  c/o Global Crossing Ltd.
                  Wessex House
                  45 Reid Street

                                                       14
<PAGE>   18
                  Hamilton HM12
                  Bermuda
                  Attention of James C. Gorton, Esq.
                  Facsimile: (441) 296-8600

         with a copy to:

                  Simpson Thacher & Bartlett
                  425 Lexington Avenue
                  New York, NY 10017
                  Attention of D. Rhett Brandon, Esq.
                  Facsimile: (212) 455-2502

         If to Global Crossing to:

                  Global Crossing Ltd.
                  Wessex House
                  45 Reid Street
                  Hamilton HM12
                  Bermuda
                  Attention of James C. Gorton, Esq.
                  Facsimile: (441) 296-8600

         with a copy to:

                  Simpson Thacher & Bartlett
                  425 Lexington Avenue
                  New York, NY 10017
                  Attention of D. Rhett Brandon, Esq.
                  Facsimile: (212) 455-2502

         If to Softbank to:

                  Softbank Corp.
                  24-1, Nihonbeshi-Hakozolacho, Chuo-ka
                  Tokyo, Japan 103-8501
                  Attention of Chief Executive Officer
                  Facsimile: (813) 5211-3082

                  and

                  Softbank Inc.
                  10 Langley Road, Suite 403
                  Newton, MA 02459
                  Attention of Ron Fisher
                  Facsimile: (617) 928-9301

                                       15
<PAGE>   19
         with a copy to:

                  Sullivan & Cromwell
                  1888 Century Park East
                  Los Angeles, CA  90067
                  Attention of Alison S. Ressler, Esq. and John L. Savva, Esq.
                  Facsimile:  310-712-8800

         If to Microsoft to:

                  Microsoft Corporation
                  One Microsoft Way
                  Redmond, WA  98052
                  Attention of Chief Financial Officer
                  Facsimile: (425) 936-7329

         with a copy to:

                  Microsoft Corporation
                  One Microsoft Way
                  Redmond, WA 98052
                  Attention of General Counsel, Finance and Operations
                  Facsimile: (425) 869-1327

         If to Goldman Sachs to:

                  The Goldman Sachs Group, Inc.
                  85 Broad Street
                  New York, NY 10004
                  Attention of General Counsel
                  Facsimile: [                  ]

         with a copy to:

                  Fried, Frank, Harris, Shriver & Jacobson
                  One New York Plaza
                  New York, NY 10004
                  Attention of Jean E. Hanson, Esq.
                  Facsimile: (212) 859-4000

or to such other address or addresses as shall be designated in writing. All
notices shall be effective when received.

                  (d) Merger, Amalgamation or Consolidation of the Company. If
the Company is a party to any merger, amalgamation, or consolidation pursuant to
which the Registrable Securities are converted into or exchanged for securities
or the right to receive securities of any other person

                                       16
<PAGE>   20
("Conversion Securities"), the issuer of such Conversion Securities shall assume
(in a writing delivered to all Holders) all obligations of the Company
hereunder. The Company will not effect any merger, amalgamation, or
consolidation described in the immediately preceding sentence unless the issuer
of the Conversion Securities complies with this Section 8(d).

                  (e) Successors and Assigns. Subject to the terms and
conditions of the Subscription and Shareholders Agreement, any lawful transferee
of all or a portion of the Registrable Securities shall become a Holder
hereunder to the extent it agrees in writing to be bound by all of the
provisions applicable hereunder to the transferring Holder (such acknowledgment
being evidenced by execution and delivery to the Company of a Counterpart and
Acknowledgment substantially in the form of Exhibit A). Subject to the
requirements of this Section 8(e), this Agreement shall inure to the benefit of
and be binding upon the successors and permitted assigns of the parties hereto.

                  (f) Counterparts. This Agreement may be executed in any number
of counterparts, each of which shall be an original, but all of which together
shall constitute one instrument.

                  (g) Titles and Subtitles. The titles of the sections and
subsections of this Agreement are for convenience of reference only and are not
to be considered in construing this Agreement.

                  (h) Governing Law. This Agreement shall be governed in all
respects by the laws of the State of New York.

                  (i) Separability. In case any provision of this Agreement
shall be invalid, illegal or unenforceable, the validity, legality and
enforceability of the remaining provisions shall not in any way be affected or
impaired thereby.

                  (j) Entire Agreement. This Agreement and the other documents
delivered pursuant hereto and the Subscription and Shareholders Agreement
constitute the full and entire understanding and agreement between the parties
with regard to the subjects thereto and no party shall be liable or bound to any
other in any manner by any representations, warranties, covenants and agreements
except as specifically set forth herein and therein.

                  (k) Submission to Jurisdiction. Each party hereto irrevocably
consents to the jurisdiction and venue of the courts of the State of New York
and the courts of the United States for the Northern or Southern Districts of
New York, and in the courts hearing appeals therefrom, for the resolution of any
dispute, action, suit or proceeding arising out of or relating to this
Agreement. Each party hereby irrevocably waives, and agrees not to assert, by
way of motion, as a defense, counterclaim or otherwise, in any action or
proceeding with respect to this Agreement, the defense of sovereign immunity,
any claim that it is not personally subject to the jurisdiction of the above-
named courts for any reason other than the failure to serve process in
accordance with this Section 8, that it or its property is exempt or immune from
jurisdiction of any such court or from any legal process commenced in such
courts (whether through service of notice, attachment prior to judgment,
attachment in aid of execution of judgment, execution of judgment or otherwise),
and to the fullest extent permitted by applicable law, that the suit, action or
proceeding in any such court is brought in an inconvenient forum, that the venue
of such suit, action or proceeding is improper, or that this Agreement, or the
subject matter hereof or thereof, may not be enforced in or by such courts and

                                       17
<PAGE>   21
further irrevocably waives, to the fullest extent permitted by applicable law,
the benefit of any defense that would hinder, fetter or delay the levy,
execution or collection of any amount to which the party is entitled pursuant to
the final judgment of any court having jurisdiction.

                  9. Notwithstanding anything herein to the contrary, the
Company shall not have any financial obligation pursuant to this Agreement
unless and until the Company is able to satisfy (after taking into account such
obligation) the requirements of Section 39A(2A) of the Companies Act 1981. For
this purposes, the Company shall be considered to satisfy such requirements if
it receives a written opinion or certificate from its independent auditors to
that effect.

                            [Signature page follows]

                                       18
<PAGE>   22
                  IN WITNESS WHEREOF, the parties have executed this Agreement
as of the date first written above.

                               GLOBAL CROSSING LTD.

                               By: /s/ DAN COHRS
                                  ----------------------------------------------
                                     Name: Dan Cohrs
                                     Title: Chief Financial

                               SOFTBANK CORP.

                               By: /s/ MASAYOSHI SON
                                  ----------------------------------------------
                                     Name: Masayoshi Son
                                     Title: Chairman

                               MICROSOFT CORPORATION

                               By: /s/ GREGORY B. MAFFEI
                                  ----------------------------------------------
                                     Name: Gregory B. Maffei
                                     Title: Senior Vice President; Chief
                                            Financial Officer

                               THE GOLDMAN SACHS GROUP, INC.

                               By: /s/ GREG PALM
                                  ----------------------------------------------
                                     Name: Greg Palm
                                     Title: General Counsel

                               ASIA GLOBAL CROSSING LTD.

                               By: /s/ JUSTIN J. O'NEILL
                                  ----------------------------------------------
                                     Name: Justin J. O'Neill
                                     Title:

<PAGE>   23
                                    EXHIBIT A

                          REGISTRATION RIGHTS AGREEMENT
                         COUNTERPART AND ACKNOWLEDGMENT

TO:               The Company

RE:               The Registration Rights Agreement (the "Agreement") dated as
                  of _______, 1999, by and among the Company and the Holders (as
                  defined in the Agreement)

                  The undersigned hereby agrees to be bound by the terms of the
Agreement as a party to the Agreement, and shall be entitled to all benefits of
the Holders (as defined in the Agreement) and shall be subject to all
obligations and restrictions of the Holders pursuant to the Agreement, as fully
and effectively as though the undersigned had executed a counterpart of the
Agreement together with the other parties to the Agreement. The undersigned
hereby acknowledges having received and reviewed a copy of the Agreement.

                  DATED this _____ day of ____________, _____

                            By:
                            Title:

                                     Number of
                                     Shares of
                                     Registrable Securities:

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