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                                                                     EXHIBIT 4.5

                     FORM OF CERTIFICATE OF DESIGNATION OF
                        SHARES OF 15% SERIES B PREFERRED
                       STOCK OF AT&T LATIN AMERICA CORP.

                            AT&T LATIN AMERICA CORP.

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                           CERTIFICATE OF DESIGNATION

                         Pursuant to Section 151 of the
                        Delaware General Corporation Law

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                     15% Series B Cumulative Preferred Stock

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         1. DESIGNATION AND AMOUNT. This series of Preferred Stock shall be
designated as the 15% Series B Cumulative Preferred Stock (the "SERIES B
PREFERRED STOCK"), and the authorized number of shares constituting such series
shall be 100,000, par value $0.001 per share.

         2. RANK. The Series B Preferred Stock shall, with respect to dividend
rights and rights on liquidation of the Corporation, rank (A) senior to all
classes of Common Stock and to each other class or series of shares of the
Corporation hereafter created, the terms of which do not expressly provide that
it ranks senior to, or on a parity with, the Series B Preferred Stock as to
dividends and distributions upon the liquidation of the Corporation
(collectively with the Common Stock, referred to for purposes of this

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Certificate as the "JUNIOR STOCK"); (B) on a parity with each class of shares or
series of preferred shares issued by the Corporation after the date hereof, the
terms of which specifically provide that such class or series will rank on a
parity with the Series B Preferred Stock as to dividends and distributions upon
the liquidation of the Corporation (collectively referred to for purposes of
this Certificate as "PARITY STOCK"), PROVIDED that any such Parity Stock not
approved by the Holders in accordance with Section 5(b) hereof shall be Junior
Stock and not Parity Stock; and (C) junior to the Series A Preferred Stock, par
value $0.001, of the Corporation (the "SERIES A PREFERRED STOCK") and to each
class or series of shares of the Corporation hereafter created that has been
approved by the Holders in accordance with Section 5(b) hereof and the terms of
which expressly provide that such class or series will rank senior to the Series
B Preferred Stock as to dividends and distributions upon liquidation, winding-up
or dissolution of the Corporation (collectively referred to as "SENIOR STOCK"),
PROVIDED that any such Senior Stock that was not approved by the Holders in
accordance with Section 5(b) shall be Junior Stock and not Senior Stock.

         3. DIVIDENDS.

         (a) Beginning on the Original Issue Date, the Holders of the
outstanding shares of Series B Preferred Stock shall be entitled to receive,
payable when and as declared by the Board of Directors of the Corporation out of
assets legally available therefor, distributions in the form of cash dividends
on each share of Series B Preferred Stock at an annual rate of fifteen percent
(15%) of the sum of (I) [$ ] (the "SERIES B PURCHASE PRICE") and (II) all
accumulated and unpaid dividends accrued thereon pursuant to this Section 3 from
the date of issuance thereof (the "SERIES B DIVIDENDS"; the sum of the Series B
Purchase Price and Series B Dividends is referred to herein as the "SERIES B
PREFERENCE AMOUNT"). All dividends shall (I) be cumulative, whether or not
earned or declared and whether or not there are profits, surplus or other funds
legally available for the payment of dividends, (II) continue to accrue on a
daily basis from the Original Issue Date until paid out of assets legally
available therefor and (III) be payable semi-annually in arrears on each
Dividend Payment Date, commencing on the first Dividend Payment Date after the
Original Issue Date. Each dividend shall be payable to the Holders of record as
they appear on the stock books of the Corporation on the Dividend Record Date
immediately preceding the related Dividend Payment Date or, if dividends are
payable on a date other than a Dividend Payment Date pursuant to the terms
hereof, ten Business Days prior to such date.

         (b) So long as any shares of Series B Preferred Stock are outstanding,
the Corporation shall not declare, pay or set apart for payment any dividend on
account of, or purchase, redeem, retire or otherwise acquire for value, or set
apart for payment money for a sinking or other similar fund for the purchase,
redemption, retirement or other acquisition for value of, any Junior Stock or
Parity Stock or any warrants, rights, calls or options exercisable for or
convertible into Junior Stock or Parity Stock, or make any distribution or
dividend in respect thereof, either directly or indirectly, whether in cash,
obligations or shares of the Corporation or other property.

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         4. LIQUIDATION, DISSOLUTION OR WINDING UP. Upon a liquidation,
dissolution or winding up of the Corporation, whether voluntary or involuntary,
(each, a "LIQUIDATION"), each Holder shall be entitled, after provision for the
payment of the Corporation's debts, any liquidation preference on Senior Stock
and any other non-contingent liabilities to be paid in cash in full, before any
distribution is made on any Junior Stock but in parity with any distribution to
Parity Stock, an amount in cash equal to the Series B Preference Amount plus an
amount equal to a prorated dividend for the period from the last Dividend
Payment Date to the date fixed for liquidation, dissolution or winding-up (the
"LIQUIDATION AMOUNT") for each Series B Preferred Share held by such Holder. If,
upon a Liquidation, the net assets of the Corporation distributable among the
Holders and the holders of any Parity Stock shall be insufficient to permit the
payment of the Liquidation Amount and the liquidation preference for such Parity
Stock in full, then the entire net assets of the Corporation remaining after the
provision for the payment of the Corporation's debts, any liquidation preference
on Senior Stock and any other non-contingent liabilities shall be distributed
among the Holders and the holders of any Parity Stock, respectively, ratably in
proportion to the full preferential amounts to which they would otherwise be
entitled on account of their Series B Preferred Stock or Parity Stock, as the
case may be.

         5. VOTING.

         (a) Except as otherwise required under law or as set forth in this
Section 5 below, the Holders shall not be entitled or permitted to vote on any
matter required or permitted to be voted upon by the stockholders of the
Corporation.

         (b) So long as any shares of Series B Preferred Stock shall be
outstanding, the approval of Holders of at least a majority of the shares of
Series B Preferred Stock at the time outstanding, voting as a separate class,
shall be required for (I) the authorization or issuance of any shares of Senior
Stock not authorized or issued as of the Original Issue Date, (II) the
authorization or issuance of any additional shares of Series B Preferred Stock,
(III) the authorization or issuance of any shares of Parity Stock, (IV) the
reclassification of any shares of the Corporation into shares of Preferred Stock
that are not Junior Stock, (V) the authorization of any security of the
Corporation exchangeable for, convertible into, or evidencing the right to
purchase any Senior Stock, Parity Stock or Series B Preferred Stock, (VI) any
amendment, alteration or revocation of the Certificate of Incorporation
(including this Certificate of Designation) or the Bylaws of the Corporation
that causes a modification in the preferences, privileges, rights or powers of
the Series B Preferred Stock and (VII) any amendment or modification of the
preferences, privileges, rights or powers of the Class A Preferred Stock that
would have an adverse effect on the Holders. Any increase in the aggregate
principal amount of any Indebtedness or other security convertible into any
class or series of shares shall be deemed an authorization or issuance of such
class or series of shares.

         (c) So long as any shares of Series B Preferred Stock shall be
outstanding, without the affirmative approval of Holders of at least a majority
of the outstanding shares of Series B Preferred Stock voting as a separate
class, the Corporation shall not, in a single transaction or series of related

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transactions, consolidate or merge with or into, or sell, assign, transfer,
lease, convey or otherwise dispose of all or substantially all of its assets to,
another Person, engage in any other similar transaction or adopt a plan of
liquidation unless: (I) either (A) the Corporation is the surviving or
continuing Person or (B) the Person (if other than the Corporation) formed by
such consolidation or into which the Corporation is merged or the Person that
acquires by conveyance, transfer or lease the properties and assets of the
Corporation substantially as an entirety or in the case of a plan of
liquidation, the Person to which assets of the Corporation have been
transferred, shall be a corporation, limited liability company, partnership or
trust organized and existing under the laws of the United States or any State
thereof or the District of Columbia; (II) if the Corporation is not the
surviving Person, the Series B Preferred Stock shall be converted into or
exchanged for and shall become shares of such successor, transferee or resulting
Person, having in respect of such successor, transferee or resulting Person the
same powers, preferences and relative, participating, optional or other special
rights and the qualifications, limitations or restrictions thereon, that the
Series B Preferred Stock had immediately prior to such transaction; (III)
immediately after giving effect to such transactions, no Triggering Event shall
have occurred or be continuing; and (IV) such surviving Person shall have
delivered to the Holders prior to the consummation of the proposed transaction
an officers' certificate and an opinion of counsel, each reasonably satisfactory
in form and substance to Holders of a at least a majority of the outstanding
Series B Preferred Stock, each stating that such consolidation, merger or
transfer complies with the terms hereof and that all conditions precedent herein
relating to such transaction have been satisfied.

         For purposes of the foregoing, the transfer (by lease, assignment, sale
or otherwise, in a single transaction or series of related transactions) of all
or substantially all of the properties or assets of one or more Subsidiaries of
the Corporation, the capital stock of which constitutes all or substantially all
of the properties and assets of the Corporation shall be deemed to be the
transfer of all or substantially all of the properties and assets of the
Corporation.

         (d) If and whenever at any time or from time to time, (I) cash
dividends on the Series B Preferred Stock are in arrears and unpaid for three or
more semi-annual Dividend Periods (whether or not consecutive), (II) the
Corporation fails to discharge any redemption obligation with respect to the
Series B Preferred Stock, (III) the Corporation fails to make an Offer to
Purchase following a Change of Control in accordance with Section 8 hereof or
fails to purchase shares of Series B Preferred Stock from Holders who validly
tender their shares pursuant to an Offer to Purchase or (IV) the Corporation
breaches or violates one of the provisions set forth in Section 9 hereof and
such breach or violation continues for a period of 30 days or more; (each such
event, a "TRIGGERING EVENT"), then occurrence of such Triggering Event shall
mark the beginning of a period (herein called a "DEFAULT PERIOD") which shall
extend until:

                  (A) any accumulated dividends that are in arrears on the
         Series B Preferred Stock are declared and paid in full cash; and

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                  (B) the failure, breach or default giving rise to any such
         Triggering Event is cured or waived by the Holders of at least a
         majority of the shares of Series B Preferred Stock then outstanding and
         entitled to vote thereon.

         During the continuance of each and every Default Period, the Holders
shall have the right (in addition to any other rights they may have), voting
separately as a class, to elect two members of the Board of Directors. The right
of the Holders to elect members of the Board of Directors during a Default
Period may be exercised initially either at a special meeting of stockholders
called as provided below or at the Corporation's next annual meeting of
stockholders, and thereafter at each subsequent annual meeting of stockholders,
until such Default Period has ended, at which time such right shall terminate,
except as herein or by law expressly provided, subject to the revesting of such
rights to such holders if a subsequent Default Period should occur. In case of
any vacancy occurring among the directors elected by the Holders, such vacancy
may be filled only by the affirmative vote of the Holders of at least a majority
of the shares of Series B Preferred Stock. At elections for such directors, each
Holder shall be entitled to one vote for each share.

         At any time when such special voting rights shall have vested in the
Holders as provided in this Section 5(d), an authorized officer of the
Corporation shall, upon the written request of the Holders of record of at least
10% of the aggregate par value of the shares of Series B Preferred Stock,
addressed to the Secretary of the Corporation, call a special meeting of the
Holders for the purpose of electing such additional directors. Such meeting
shall be held at the earliest practicable date at the principal office of the
Corporation or such other place as is agreed by the Corporation and Holders of a
least a majority of the outstanding shares of Series B Preferred Stock. If such
meeting shall not be called by a proper officer of the Corporation within 15
days after receipt of written request upon the Secretary of the Corporation (or
any Assistant Secretary if the Secretary is absent) sent by first class mail,
postage prepaid, or by overnight air courier, or within 15 days after mailing
the same within the United States of America by registered mail addressed to the
Secretary of the Corporation at its principal office, then Holders of record of
at least 10% of the aggregate par value of the shares of Series B Preferred
Stock at the time outstanding may designate in writing one of the Holders to
call such meeting at the expense of the Corporation, and such meeting may be
called by such Person so designated upon the notice required for annual meetings
of stockholders and shall be held at such principal office. Any Holder so
designated shall have access to the stock books of the Corporation relating to
the Holders of Series B Preferred Stock for the purpose of causing meetings of
stockholders to be called pursuant to these provisions.

         At any meeting held for the purpose of electing directors at which the
Holders shall have the special right, voting together as one class to elect
directors as provided in this Section 5(d), the presence, in person or by proxy,
of the Holders of at least a majority of the shares of Series B Preferred Stock
at the time outstanding shall be required to constitute a quorum of such class
for the election of directors pursuant to this Section 5(d), and the affirmative
vote of the Holders of at least a majority of the shares of Series B Preferred

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Stock present in person or by proxy at such meeting shall constitute the act of
such Series B Preferred Stock. At any such meeting or adjournment thereof, in
the absence of a quorum, Holders of at least a majority of the Series B
Preferred Stock present in person or by proxy shall have the power to adjourn
the meeting for the election of the directors that they are entitled to elect
from time to time, without notice other than announcement at the meeting, until
such a quorum shall be present.

         Immediately upon the commencement of any Default Period, the
Corporation will give written notice thereof to each Holder of then outstanding
shares of Series B Preferred Stock, at the address of each such Holder as it
appears on the books of the Corporation.

         6. REDEMPTION AT CORPORATION'S OPTION.

         (a) The Corporation shall have the right (the "REDEMPTION RIGHT"), in
its sole discretion, to redeem any outstanding shares of Series B Preferred
Stock at any time after the fourth annual anniversary of the Original Issue
Date. The redemption price (the "CORPORATION REDEMPTION PRICE") of each share of
Series B Preferred Stock so redeemed shall be equal to the Series B Preference
Amount plus an amount equal to a prorated dividend for the period from the date
after the last Dividend Payment Date to the Corporate Redemption Date.

         (b) The Corporation may elect to exercise the Redemption Right by
written notice (a "CORPORATION NOTICE OF REDEMPTION") to each registered Holder
specifying the time and place of such redemption and the number of shares of
Series B Preferred Stock held by such Holder to be redeemed. Such Corporation
Notice of Redemption shall be mailed by certified mail, return receipt
requested, at least 10, and not more than 30 days prior to the date specified
for redemption (the "CORPORATION REDEMPTION DATE"), to each registered Holder at
such Holder's last address as it appears on the Corporation's books. At the
closing of any redemption pursuant to this Section 6, the Corporation shall pay
to each of the Holders called for redemption, against the Corporation's receipt
from such Holder of the certificate or certificates representing the shares of
such Series B Preferred Stock then held by such Holder, an amount equal to the
Corporation Redemption Price for each such share, by wire transfer of
immediately available funds.

         (c) In the case of any redemption pursuant to this Section 6, unless
the Corporation fails to pay in full the Corporation Redemption Price, dividends
on the shares called for redemption shall cease to accumulate on the applicable
Corporation Redemption Date, and all rights of the Holders subject to such
redemption by reason of their ownership of such shares shall cease on such
Corporation Redemption Date, except the right to receive the Corporation
Redemption Price on surrender to the Corporation of the certificates
representing such shares. After the applicable Corporation Redemption Date, the
shares shall not be deemed to be outstanding and shall not be transferable on
the books of the Corporation, except to the Corporation.

         (d) Any shares of Series B Preferred Stock redeemed by the Corporation
pursuant to this Section 6 shall be canceled and shall have the status of
authorized and unissued preferred stock, without designation as to series.

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         7. REDEMPTION AT HOLDER'S OPTION.

         (a) Each Holder shall have the right (the "PUT RIGHT"), in its sole
discretion, to require the Corporation to redeem all or any portion of its
outstanding shares of Series B Preferred Stock at any time after the fourth
annual anniversary of the Original Issue Date. The redemption price (the "HOLDER
REDEMPTION PRICE") of each share of Series B Preferred Stock so redeemed shall
be equal to the Series B Preference Amount plus an amount equal to a prorated
dividend for the period from the date after the last Dividend Payment Date to
the Holder Redemption Date.

         (b) A Holder may elect to exercise its Put Right pursuant to Section
7(a) by mailing written notice (a "HOLDER REDEMPTION NOTICE") to the Corporation
by certified mail, return receipt requested. The Holder Redemption Notice shall
specify:

                  (i) the name of the Holder delivering such Holder Redemption
         Notice;

                  (ii) that such Holder is exercising its Put Right to require
         the Corporation to redeem shares of Series B Preferred Stock held by
         such holder; and

                  (iii) the number of shares of Series B Preferred Stock to be
         subject to such redemption.

         (c) The Corporation shall, within thirty days of receipt of such Holder
Redemption Notice, deliver to each Holder exercising its Put Right, a notice
(the "CORPORATION NOTICE") specifying the date set for such redemption, which
date shall be no more than thirty days after the Corporation Notice (the "HOLDER
REDEMPTION DATE"). At the closing of any redemption pursuant to this Section 7,
the Corporation shall pay to each of the Holders exercising its Put Right,
against the Corporation's receipt from such Holder of the certificate or
certificates representing the shares of such Series B Preferred Stock set forth
in the Holder Redemption Notice, an amount equal to the Holder Redemption Price
for each such share, by wire transfer of immediately available funds.

         (d) Notwithstanding anything contained in this Section 7 to the
contrary, the Corporation shall not be obligated to redeem shares of Series B
Preferred Stock that are the subject of a Holder Redemption Notice if such
redemption would result in a breach of, or would cause a default or event of
default under, the Certificate of Designation of the Series A Preferred Stock,
PROVIDED that if such breach, event of default or default would not result from
the redemption of any number of shares of Series B Preferred Stock which is less
than the total number of shares the Corporation is obligated to redeem on the
Holder Redemption Date, the Corporation shall purchase on the Holder Redemption
Date the maximum number of shares of Series B Preferred Stock it may so
purchase, allocated among the holders which have elected to have their shares so
repurchased ratably according to the number of shares so tendered; PROVIDED,
FURTHER, however, the Corporation shall use its reasonable efforts to cure such

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default or violation in a timely manner and remove any associated restrictions
or limitations which are applicable to the rights of the Holders contained in
this Section 7.

         (e) In the case of any redemption pursuant to this Section 7, unless
the Corporation defaults in the payment in full of the Holder Redemption Price,
dividends on the shares called for redemption shall cease to accumulate on the
applicable Holder Redemption Date, and all rights of the Holders subject to such
redemption by reason of their ownership of such shares shall cease on such
redemption date, except the right to receive the Holder Redemption Price on
surrender to the Corporation of the certificates representing such shares. After
the applicable Holder Redemption Date, the shares shall not be deemed to be
outstanding and shall not be transferable on the books of the Corporation,
except to the Corporation.

         (f) Any shares of Series B Preferred Stock redeemed by the Corporation
pursuant to this Section 7 shall be canceled and shall have the status of
authorized and unissued preferred stock, without designation as to series.

         8. CHANGE OF CONTROL.

         (a) OFFER TO PURCHASE. Within ten days following a Change of Control,
the Corporation shall notify Holders of the Change of Control and shall make an
offer (the "OFFER TO PURCHASE") to each such Holder to purchase for cash such
Holder's shares of Series B Preferred Stock, or such portion thereof as may be
determined by such Holder, at a price equal to 101% of sum of the Series B
Preference Amount plus an amount equal to a prorated dividend for the period
from the date after the last Dividend Payment Date to the closing date for Offer
to Purchase (the "CHANGE OF CONTROL PRICE").

         (b) On the twentieth Business Day following the date of the Offer to
Purchase or such other date agreed by the Corporation and Holders holding at
least a majority of the outstanding shares of Series B Preferred Stock, the
Corporation shall (A) accept for payment such shares of Series B Preferred Stock
that are validly tendered pursuant to the Offer to Purchase, and (B) pay to the
Holders of shares so accepted an amount in cash per share equal to the Change of
Control Price by wire transfer of immediately available funds. Unless the
Corporation defaults in the payment for the Series B Preferred Stock tendered
pursuant to the Offer to Purchase, dividends will cease to accrue with respect
to the Series B Preferred Stock so tendered and all rights of Holders of such
tendered shares will terminate, except for the right to receive payment
therefor. Any shares of Series B Preferred Stock which shall have been redeemed
pursuant to this Section 8 shall be canceled and shall have the status of
authorized and unissued preferred stock, without designation as to series.

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         9. OTHER PROVISIONS.

         (a) ISSUANCES OF CAPITAL STOCK OF SUBSIDIARIES. The Corporation shall
not permit any Subsidiary directly or indirectly to issue, sell, assign, pledge
or otherwise encumber or dispose of any shares of its Capital Stock (except to
the Corporation or another Subsidiary).

         (b) LIMITATIONS ON DIVIDEND AND OTHER PAYMENT RESTRICTIONS AFFECTING
SUBSIDIARIES. The Corporation shall not, and shall not cause or permit any of
its Subsidiaries to, directly or indirectly, create or otherwise cause or permit
or suffer to exist or become effective any encumbrance or restriction on the
ability of any Subsidiary of the Corporation to (I) pay dividends or make any
other distributions on its Capital Stock or any other interest or participation
in, or measured by, such Subsidiary's profits; or (II) make loans or advances or
pay any Indebtedness or other obligation owed to the Corporation or to any
Subsidiaries of the Corporation (any such restriction or encumbrance a "PAYMENT
RESTRICTION"), except for such Payment Restrictions existing under or by reason
of:

                  (A) this Certificate of Designation;

                  (B) any outstanding Indebtedness as in effect on the Original
         Issue Date;

                  (C) the Global Card Holdings Inc. Credit Facility Agreement;

                  (D) Acquired Indebtedness permitted by the terms of this
         Certificate of Designation, PROVIDED that such Indebtedness is not
         incurred as a result or in contemplation of the Asset Acquisition or
         acquisition of a Person resulting in such Indebtedness becoming
         Acquired Indebtedness; or

                  (E) applicable law or regulations.

         10. DEFINITIONS. As used in this Certificate of Designation, and unless
the context requires a different meaning, the following terms have the meanings
indicated:

         (i) "ACQUIRED INDEBTEDNESS" means Indebtedness of a Person (a) assumed
in connection with an Asset Acquisition from such Person and (b) existing at the
time such Person becomes a Subsidiary of any other Person.

         (ii) "AFFILIATE" of a Person means a Person that directly or indirectly
through one or more intermediaries, controls, is controlled by, or is under
common control with, the first Person. "CONTROL" (including the terms
"CONTROLLED BY" and "UNDER COMMON CONTROL WITH") means the possession, directly
or indirectly, of the power to direct or cause the direction of the management
policies of a Person, whether through the ownership of voting securities, by
contract or credit arrangement, as trustee or executor, or otherwise.

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         (iii) "ASSET ACQUISITION" means (a) a transaction in which a Person
becomes a Subsidiary of the Corporation or is merged with or into the
Corporation or any Subsidiary of the Corporation or (b) the acquisition by the
Corporation or a Subsidiary of the Corporation of assets of any Person which
constitute all or substantially all of the assets of such Person or any division
or line of business of such Person.

         (iv) "BUSINESS DAY" means any day other than a Saturday, Sunday or day
on which banking institutions in the New York, New York are authorized or
obligated by law or executive order to close.

         (v) "CAPITAL STOCK" means, with respect to any Person, any ownership
interest in the voting or nonvoting capital stock or similar equity interest of
such Person, whether held or controlled directly or indirectly through the
ownership or control of capital stock or similar equity interest in one more
affiliates.

         (vi) "CHANGE OF CONTROL" means the occurrence, on or prior to the
fourth annual anniversary of the Original Issue Date, of any of the following
events: (A) any "person" or "group" (as such terms are used in Sections 13(d)
and 14(d) of the Securities Exchange Act of 1934, as amended (the "EXCHANGE
ACT")), other than AT&T Corp., AT&T Global Card Holdings Inc., any of their
Affiliates or a Concert Party, is or becomes the "beneficial owner" (as defined
in Rule 13d-3 and 13d-5 under the Exchange Act, except that a Person shall be
deemed to have "beneficial ownership" of all securities that such Person has the
right to acquire, whether such right is exercisable immediately or only after
the passage of time), directly or indirectly, of more than 50% of the Voting
Stock of the Corporation; (B) the Corporation consolidates with, or mergers with
or into, another Person, or sells, assigns, conveys, transfers, leases or
otherwise disposes of all or substantially all of its assets to any Person, or
any Person consolidates with, or merges with or into the Corporation, in any
such event pursuant to a transaction in which the outstanding Voting Stock of
the Corporation is converted into or exchanged for cash, securities, or other
property, other than any such transaction where (I) the outstanding Voting Stock
of the Corporation is converted into or exchanged for Voting Stock of the
surviving or transferee Person or its parent corporation, and (II) the
shareholders of the Corporation immediately prior to such transaction, together
with their Affiliates or a Concert Party, own more than 50% of the Voting Stock
of the surviving person; or (C) any voluntary liquidation, dissolution or
winding up of the Corporation, other than in a circumstance described in the
preceding clause (b).

         (vii) "COMMON STOCK" means the Class A Common Stock of the Corporation
(the "CLASS A COMMON STOCK") and the Class B Common Stock of the Corporation
(the "CLASS B COMMON STOCK").

         (viii) "CONCERT PARTY" means any Person controlled (as such term is
defined in the definition of Affiliate), indirectly or directly, by AT&T Corp.
and British Telecommunications plc. in connection with their Concert joint
venture

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         (ix) "DIVIDEND PAYMENT DATE" means [June 15 and December 15] of each
year; PROVIDED that if any such day is not a Business Day, the relevant Dividend
Payment Date shall be the first Business Day preceding such day.

         (x) "DIVIDEND RECORD DATE" means [June 1 and December 1] of each year.

         (xi) "DIVIDEND PERIOD" means a period commencing on the next succeeding
date after the Dividend Payment Date and ending on the next Dividend Payment
Date.

         (xii) "GLOBAL CARD HOLDINGS INC. CREDIT FACILITY AGREEMENT" means the
Credit Facility Agreement, dated [      ], 2000, among the Corporation, Global
Card Holdings Inc. and certain subsidiaries of the Corporation, as the same
may be amended from time to time.

         (xiii) "HOLDER" means a holder of outstanding Series B Preferred Stock
as reflected in the stock books of the Corporation.

         (xiv) "INDEBTEDNESS" of any Person at any date, means all indebtedness
for borrowed money or for the deferred purchase price of property or services
(other than trade liabilities incurred in the ordinary course of business and
payable in accordance with customary practices), obligations under capital
leases appearing or required to appear on the balance sheet of such Person and
any other indebtedness of such Person which is evidenced by a note, bond,
debenture or similar instrument.

         (xv) "ORIGINAL ISSUE DATE" means the date on which a share of Series B
Preferred Stock was first issued.

         (xvi) "PERSON" means any natural person, firm, partnership,
association, corporation, company, limited liability company, trust, business
trust, governmental authority or other entity.

         (xvii) "SUBSIDIARY" means each Person in which a Person owns or
controls, directly or indirectly, capital stock or other equity interests
representing more than 50% of the outstanding voting stock or other equity
interests.

         (xviii) "VENDOR FINANCING FACILITY" means any credit facilities of the
Corporation or any of its Subsidiaries to finance the purchase or use of
equipment, software and/or services provided by the vendors thereof, PROVIDED
such facility is not secured by any assets other than the assets acquired from
such vendor or vendors by Borrower or its Subsidiaries in connection with such
facility as permitted by this Agreement.

         (xix) "VOTING STOCK" means at any time with respect to any Person
shares of any class of capital stock of such Person which are then entitled to
vote generally in the election of directors.

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                                                                     EXHIBIT 4.9

                             SUPPLEMENTAL INDENTURE

     SUPPLEMENTAL INDENTURE, dated as of January 8, 1999, between FirstCom
Corporation, a Texas corporation (the "Company") (formerly, InterAmericas
Communications Corporation), and State Street Bank and Trust Company, as trustee
under the indenture referred to below (the "Trustee").

                                    RECITALS

     WHEREAS, the Company has heretofore executed and delivered to the Trustee
an indenture, dated as of October 27, 1997 (the "Indenture"), providing for the
issuance of an aggregate principal amount of $150,000,000 of 14% Senior Notes
due 2007 (the "Notes");

     WHEREAS, Sections 2.09 and 9.02 of the Indenture provide that, except with
respect to certain specified provisions of the Indenture, the Indenture may be
amended or supplemented with the consent of the Holders of a majority in
principal amount of the Notes then outstanding voting as a single class, other
than Notes owned by the Company, or by any Person directly or indirectly
controlling or controlled by or under direct or indirect common control with
the Company;

     WHEREAS, the Company wishes to supplement the Indenture to change certain
provisions of the Indenture as set forth below, and the Holders of a majority
of the aggregate principal amount of the outstanding Notes voting as a single
class as of June 25, 1998, excluding Notes owned by the Company, or by any
Person directly or indirectly controlling or controlled by or under direct or
indirect common control with the Company, have consented to the execution of
this Supplemental Indenture pursuant to the consent solicitation made by the
Company pursuant to that certain Consent Solicitation Statement, dated June 29,
1998, relating to the Notes (the "Consent Solicitation Statement"); and

     WHEREAS, the Company hereby covenants and represents that all things
necessary have been done to make this Supplemental Indenture a legal, valid and
binding agreement of the Company in accordance with the terms hereof and of the
Indenture.

     NOW THEREFORE, in consideration of the foregoing and for other good and
valuable consideration, the receipt of which is hereby acknowledged, it is
hereby agreed as follows:

                                  ARTICLE ONE

            DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION

SECTION 101. Capitalized Terms.

     Capitalized terms used herein and not otherwise defined herein are used
with the respective meanings ascribed to such terms in the Indenture.

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SECTION 102. Effective Time.

     The amendments to the provisions of the Indenture provided for in this
Supplemental Indenture shall become operative and shall bind the parties hereto
when this Supplemental Indenture has been executed by the parties hereto (the
"Effective Time").

SECTION 103. Incorporation of Supplemental Indenture into Indenture.

     This Supplemental Indenture is executed by the Company and the Trustee
pursuant to the provisions of Section 9.02 of the Indenture, and the terms and
conditions hereof shall be deemed to be part of the Indenture for all purposes
at and as of the Effective Time. The Indenture, as amended and supplemented
by this Supplemental Indenture, is in all respects hereby adopted, ratified and
confirmed.

SECTION 104. Effect of Headings.

     The Article and Section headings herein are for convenience only and shall
not affect the construction hereof.

SECTION 105. Governing Law.

     The internal law of the State of New York shall govern and be used to
construe this Supplemental Indenture, without giving effect to applicable
principles of conflicts of law to the extent that the application of the laws of
another jurisdiction would be required thereby.

SECTION 106. Counterparts.

     This Supplemental Indenture may be executed in any number of counterparts,
each of which so executed shall be deemed to be an original, but all such
counterparts shall together constitute but one and the same instrument.

SECTION 107. Recitals.

     The recitals contained herein shall be taken as the statements of the
Company, and the Trustee assumes no responsibility for their correctness. The
Trustee makes no representations as to the validity or sufficiency of this
Supplemental Indenture.

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                                  ARTICLE TWO

                     AMENDMENTS TO PROVISIONS OF INDENTURE

Section 201.  DEFINITIONS.

     (a)  The definition of "Permitted Liens" contained in Section 1.01 of the
Indenture is hereby amended to read in its entirety as follows:

     "Permitted Liens" means, without duplication, each of the following:

          (i)     Liens in favor of the Company or any of its Wholly Owned
Restricted Subsidiaries;

          (ii)    Liens on property of a Person existing at the time such
Person is merged into or consolidated with the Company or any Restricted
Subsidiary of the Company, provided that such Liens were in existence prior to
the contemplation of such merger or consolidation and do not extend to any
assets other than those of the Person merged into or consolidated with the
Company or such Restricted Subsidiary;

          (iii)   Liens on property existing at the time of acquisition
thereof by the Company or any Restricted Subsidiary of the Company, provided
that such Liens were in existence prior to the contemplation of such
acquisition;

          (iv)    Liens existing on the date of this Indenture;

          (v)     Liens to secure the performance of statutory obligations,
surety or appeal bonds, performance bonds or other obligations of a like nature
incurred in the ordinary course of business;

          (vi)    Liens for taxes, assessments or governmental charges or
claims that are not yet delinquent or that are being contested in good faith by
appropriate proceedings promptly instituted and diligently concluded, provided
that any reserve or other appropriate provision as shall be required in
conformity with GAAP shall have been made therefor;

          (vii)   Liens securing Indebtedness of any Restricted Subsidiary of
the Company that does not exceed $5.0 million at any one time outstanding
represented by Capital Lease Obligations, mortgage financings or purchase money
obligations, in each case incurred for the purpose of financing all or any part
of the purchase price or cost of construction or improvement of property, plant
or equipment used in the business of such Restricted Subsidiary;

          (viii)  Liens on assets of Unrestricted Subsidiaries that secure
Non-Recourse Debt of Unrestricted Subsidiaries;

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          (ix)      Liens created pursuant to the Proceeds Pledge and Escrow
Agreement;

          (x)       Liens incurred in the ordinary course of business of the
Company or any Restricted Subsidiary of the Company with respect to obligations
that do not exceed $5.0 million at any one time outstanding and that (a) are not
incurred in connection with the borrowing of money or the obtaining of advances
or credit (other than trade credit in the ordinary course of business) and (b)
do not in the aggregate materially detract from the value of the property or
materially impair the use thereof in the operation of business by the Company or
such Restricted Subsidiary;

          (xi)      Liens securing the Notes;

          (xii)     easements, rights-of-way, zoning and similar restrictions
and other similar encumbrances or title defects which, in the aggregate, are not
material in amount, and which do not, in any case, materially detract from the
value of the property subject thereto (as such property is used by the Company
or any of its Restricted Subsidiaries) or interfere with the ordinary conduct of
the business of the Company or any of its Restricted Subsidiaries;

          (xiii)    Liens arising by reason of any judgment, decree or order or
any court so long as such Lien is adequately bonded and any appropriate legal
proceedings that may have been initiated for the review of such judgment, decree
or order shall not have been finally terminated or the period within which such
proceedings may be initiated shall not have expired;

          (xiv)     any interest or title of a lessor under any Capital Lease
Obligation;

          (xv)      Liens securing Indebtedness incurred pursuant to Section
4.09(b)(xii) hereof; and

          (xvi)     any extension, renewal or replacement, in whole or in part,
of any Permitted Lien, provided that any such extension, renewal or replacement
shall be no more restrictive in any material respects that the Lien so extended,
renewed or replaced and shall not extend to any additional property or assets.

SECTION 202.  Covenants.

     (a)     Section 4.09 of the Indenture is hereby amended to read in its
entirety as follows:

     SECTION 4.09  INCURRENCE OF INDEBTEDNESS AND ISSUANCE OF PREFERRED STOCK

          (a)       The Company shall not, and shall not permit any of its
     Subsidiaries to, directly or indirectly, create, incur, issue, assume,
     guarantee or otherwise become directly or indirectly liable, contingently
     or otherwise, with respect to (collectively, "incur") any Indebtedness
     (including Acquired Debt) and that the Company will not issue any
     Disqualified Stock and will not permit any of its Subsidiaries to issue any
     shares of preferred stock; provided, however, that the Company may incur
     Indebtedness (including Acquired

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Debt) and the Company may issue shares of Disqualified Stock if the Company's
Debt to Cash Flow Ratio would have been no greater than 5.5 to 1, in the case
of any such incurrence or issuance on or before December 31, 2000, or no
greater than 5.0 to 1, in the case of any such incurrence or issuance at any
time thereafter, in each case, determined on a pro forma basis (including a pro
forma application of the net proceeds thereof), as if the additional
Indebtedness had been incurred, or the Disqualified Stock had been issued, as
the case may be, at the beginning of the applicable four full fiscal quarter
period. The Company shall not incur any Indebtedness that is contractually
subordinated to any other Indebtedness of the Company unless such Indebtedness
is also contractually subordinated to the Senior Notes on substantially
identical terms; provided, however, that no Indebtedness of the Company shall be
deemed to be contractually subordinated to any other Indebtedness of the Company
solely by virtue of being unsecured.

     (b)  The provisions of Section 4.09(a) shall not apply to the incurrence
of any of the following items of Indebtedness (collectively, "Permitted Debt"):

          (i)  the incurrence by the Company or its Restricted Subsidiaries of
     Indebtedness under Credit Facilities; provided that the aggregate principal
     amount of all Indebtedness (with letters of credit being deemed to have a
     principal amount equal to the maximum potential liability of the Company
     thereunder) outstanding under all Credit Facilities after giving effect to
     such incurrence, including all Permitted Refinancing Indebtedness incurred
     to refund, refinance or replace any other Indebtedness incurred pursuant to
     this clause (i), does not exceed an amount equal to $40.0 million less the
     aggregate amount of all Net Proceeds of Asset Sales that have been applied
     since the date of this Indenture to repay Indebtedness under Credit
     Facilities (or any such Permitted Refinancing Indebtedness) pursuant to
     Section 4.10 hereof, provided, further, that the aggregate principal amount
     of Indebtedness at any one time outstanding under Credit Facilities that is
     incurred by, or secured by the Capital Stock or assets of, any Restricted
     Subsidiary that is located, or that derives substantially all of its
     revenue from the conduct of business, in Peru shall not exceed $15.0
     million;

          (ii)  the incurrence by the Company and its Restricted Subsidiaries of
     the Existing Indebtedness;

          (iii)   the incurrence by the Company of Indebtedness represented by
     the Notes;

          (iv)  the incurrence by the Company or any of its Restricted
     Subsidiaries of Indebtedness in connection with the acquisition of assets
     or a new Restricted Subsidiary, provided that such Indebtedness was
     incurred by the prior owner of such assets or such Subsidiary prior to such
     acquisition by the Company or such Restricted Subsidiary and was not
     Incurred in connection with, or in contemplation of, such acquisition by
     the Company or such Restricted Subsidiary: and provided

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further that the principal amount (or accreted value, as applicable) of such
Indebtedness (or accreted value, as applicable), including all Permitted
Refinancing Indebtedness incurred to refund, refinance or replace any other
Indebtedness incurred pursuant to this clause (iv), does not exceed $5.0 million
at any time outstanding;

     (v)  Indebtedness of the Company not to exceed, at any one time
outstanding, two times the sum of (A) the Current Market Value as of the date of
issue of any Qualified Capital Stock of the Company issued to the seller(s) of a
Permitted Business as consideration for the acquisition of such business and (B)
the net cash proceeds received by the Company after the date of this Indenture
from the issuance and sale of its Qualified Capital Stock to the extent that
such net cash proceeds have been, and continue to be, designated as Designated
Equity Proceeds to be used for the purpose of incurring additional Indebtedness
pursuant to this clause (v) as provided in the definition thereof; provided
that, to the extent that any such Qualified Capital Stock ceases to be
outstanding for any reason, any Indebtedness that was incurred as a result of
the receipt of net cash proceeds from the issuance of such Qualified Capital
Stock shall cease (as of the date on which such Qualified Capital Stock ceases
to be outstanding) to be permitted by virtue of this clause (v);

     (vi)  the incurrence by the Company or any of its Restricted Subsidiaries
of Permitted Refinancing Indebtedness in exchange for, or the net proceeds of
which are used to refund, refinance or replace Indebtedness (other than
intercompany Indebtedness or Indebtedness pursuant to a Credit Facility) that
was permitted by this Indenture to be incurred;

     (vii)  the incurrence by the Company or any of its Restricted Subsidiaries
of intercompany Indebtedness between or among the Company and any of its Wholly
Owned Restricted Subsidiaries; provided, however, that (A) if the Company is the
obligor on such Indebtedness, such Indebtedness is expressly subordinated to the
prior payment in full in cash of all Obligations with respect to the Senior
Notes and (B)(1) any subsequent issuance or transfer of Equity Interests that
results in any such Indebtedness being held by a Person other than the Company
or a Wholly Owned Restricted Subsidiary and (2) any sale or other transfer of
any such Indebtedness to a Person that is not either the Company or a Wholly
Owned Restricted Subsidiary shall be deemed, in each case, to constitute an
incurrence of such Indebtedness by the Company or such Restricted Subsidiary, as
the case may be;

     (viii)  the guarantee by the Company of Indebtedness of the Company or a
Restricted Subsidiary of the Company that was permitted to be incurred by
another provision of this covenant;

     (ix)  the incurrence by the Company's Unrestricted Subsidiaries of
Non-Recourse Debt; provided, however, that if any such Indebtedness ceases to be

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     Non-Recourse Debt of an Unrestricted Subsidiary, such event shall be deemed
     to constitute an incurrence of Indebtedness by a Restricted Subsidiary of
     the Company;

          (x)  Indebtedness of the Company or any Restricted Subsidiary of the
     Company (A) in respect of statutory obligations, performance, surety or
     appeal bonds or other obligations of a like nature incurred in the ordinary
     course of business or (B) under Hedging Obligations; provided that such
     agreements (1) are designed solely to protect the Company or its Restricted
     Subsidiaries against fluctuations in foreign currency exchange rates or
     interest rates and (2) do not increase the Indebtedness of the obligor
     outstanding at any time other than as a result of fluctuations in foreign
     currency exchange rates or interest rates or by reason of fees, indemnities
     and compensation payable thereunder;

          (xi)  the incurrence by the Company of additional Indebtedness in an
     aggregate principal amount (or accreted value, as applicable) at any time
     outstanding, including all Permitted Refinancing Indebtedness incurred to
     refund, refinance or replace any other Indebtedness incurred pursuant to
     this clause (xi), not to exceed $5.0 million; and

          (xii)  the incurrence by the Company and its Restricted Subsidiaries
     of Indebtedness in connection with the deposit by the Company and its
     Restricted Subsidiaries of funds with a financial institution and the
     onlending of such funds to, and the incurrence of such Indebtedness by, a
     Wholly Owned Restricted Subsidiary of the Company, provided that the
     principal amount of such Indebtedness does not exceed $100.0 million at any
     one time outstanding.

     (c)  For purposes of determining compliance with this covenant, in the
event that an item of Indebtedness meets the criteria of more than one of the
categories of Permitted Debt described in clauses (i) through (xi) of Section
4.09(b) hereof or is entitled to be incurred pursuant to Section 4.09(a)
hereof, the Company shall, in its sole discretion, classify such item of
Indebtedness in any manner that complies with this Section 4.09 and such item
of Indebtedness will be treated as having been incurred pursuant to only one of
such clauses of Section 4.09(b) hereof or pursuant to Section 4.09(a) hereof.
Accrual of interest and the accretion of accreted value will not be deemed to
be an incurrence of Indebtedness for purposes of this Section 4.09.

     (b)  Section 4.22 of the Indenture is hereby amended to read in its
entirety as follows:

SECTION 4.22. LIMITATION ON ISSUES AND SALES OF CAPITAL STOCK OF THE COMPANY.

     The Company shall not transfer, convey, sell, lease or otherwise dispose
of any Equity Interest of the Company to any Person unless the consideration
received therefor

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is at least equal to the Fair Market Value of such Equity Interests and all of
such consideration is in the form of cash.

        The provisions of the first paragraph of this section will not apply to:

        (i) the transfer, conveyance, sale, lease or other disposition of all or
   substantially all of the Equity Interests of the Company; provided that the
   transfer, conveyance, sale, lease or other disposition of all or
   substantially all of the Equity Interest of the Company will be governed by
   Section 4.15 and/or Section 5.01 hereof and not by the provisions of this
   section;

        (ii) the transfer, conveyance, sale, lease or other disposition of
   Equity Interests of the Company in exchange for long-term assets used or
   useful in a Permitted Business or a controlling interest in a Permitted
   Business; provided that the Company delivers to the Trustee (a) with respect
   to any such transfer, conveyance, sale, lease or other disposition or series
   of related transfers, conveyances, sales, leases or other dispositions
   involving Equity Interests with a fair market value less than $5.0 million, a
   resolution of the Board of Directors set forth in an Officers' Certificate
   certifying that such transfer, conveyance, sale, lease or other disposition
   is fair to the Company's shareholders and (b) with respect to any such
   transfer, conveyance, sale, lease, or other disposition or series of related
   transfers, conveyances, sales, leases or other dispositions involving Equity
   Interests with a fair market value equal to or in excess of $5.0 million, an
   opinion as to the fairness to the Company's shareholders of such transfer,
   conveyance, sale, lease or other disposition from a financial point of view
   issued by the Initial Purchaser or any other investment banking firm of
   national standing chosen by the Company;

        (iii) (A) the grant or issuance of options, warrants or other rights to
   acquire Capital Stock of the Company ("Options") pursuant to a stock option
   plan which (a) shall have been approved by the Company's stockholders, (b)
   shall prohibit the granting of Options prior to June 30, 1998 (other than to
   directors or employees of the Company or any Subsidiary of the Company
   appointed or hired subsequent to the date of this Indenture), (c) shall limit
   the aggregate number of shares of common stock of the Company issuable in any
   fiscal year upon the exercise of Options to 1.0 million (subject to
   adjustments for stock splits and other customary events) and (d) shall
   provide that any Option must have an exercise price equal to or in excess of
   the market price for the underlying common stock of the Company on the date
   such Option is granted by the Company and (B) the issuance of Capital Stock
   of the Company upon the exercise of any such Option; and

        (iv) the issuance of Capital Stock of the Company upon the exercise of
   any options or warrants to acquire Capital Stock of the Company outstanding
   on or prior to October 27, 1997.

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     IN WITNESS WHEREOF, the parties hereto have executed this Supplemental
Indenture as of the date first above written.

                                        STATE STREET BANK AND
                                        TRUST COMPANY, as Trustee

                                        By:  /s/ R Elovecky
                                            ---------------------------------
                                            Name: Rinette Elovecky
                                            Title: V.P.

                                        FIRSTCOM CORPORATION, as Issuer

                                        By:  /s/ Douglas G. Geib II
                                            ---------------------------------
                                            Name: Douglas G. Geib II
                                            Title: Chief Financial Officer

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