US$10,287,919 ACCOUNTS PAYABLE FINANCING AGREEMENT dated as of March 25, 2003, by and among IMPSAT S.A. as Borrower, NORTEL NETWORKS LIMITED, as Administrative Agent, and The Lenders Party Hereto From Time to Time as Lenders

EXHIBIT 1

Execution Copy

US$10,287,919

ACCOUNTS PAYABLE FINANCING AGREEMENT

dated as of March 25, 2003,

by and among

IMPSAT S.A.

as Borrower,

NORTEL NETWORKS LIMITED,

as Administrative Agent,

and

The Lenders Party Hereto From Time to Time

as Lenders

TABLE OF CONTENTS


W I T N E S S E T H:		1

SECTION 1. Definitions		2




	Section 1.1. Defined Terms	2




	Section 1.2. Other Definitions	20




	Section 1.3. Interpretation	21




	Section 1.4. Accounting Principles and Terms	21

SECTION 2. The Credit Facility		21




	Section 2.1. Loans	21




	Section 2.2. Notes	22

SECTION 3. Payment of Principal, Interest and Fees		22




	Section 3.1. Repayment of Principal	22




	Section 3.2. Prepayments	22




	Section 3.3. Interest	26




	Section 3.4. INTENTIONALLY OMITTED	26




	Section 3.5. Nature of Payments	26




	Section 3.6. Payment Procedures	26




	Section 3.7. Administrative Agent’s Determination	27




	Section 3.8. Payments Pro Rata	27




	Section 3.9. Governmental Approvals	27

SECTION 4. Payment in Dollars; Event of Sovereign Risk		28




	Section 4.1. Obligation to Pay in Dollars; Judgment Currency	28




	Section 4.2. Event of Sovereign Risk	28




	Section 4.3. Waiver of “Pesification”	30

SECTION 5. Funding and Yield Protection		30




	Section 5.1. Taxes	30




	Section 5.2. Illegality	31




	Section 5.3. Increased Costs and Yield Protection	32

SECTION 6. Deliveries; Conditions Precedent		33




	Section 6.1. Closing Documents	33




	Section 6.2. Plan and Plan Confirmation	34




	Section 6.3. INTENTIONALLY OMITTED	35




	Section 6.4. Restated Argentine Financing Agreement	35




	Section 6.5. Material Agreements	35


	Section 6.6. Representations and Warranties	35




	Section 6.7. Covenants	35




	Section 6.8. Litigation	35




	Section 6.9. No Defaults	35




	Section 6.10. Material Adverse Change	35




	Section 6.11. Payment of Fees	36




	Section 6.12. Capitalization of ISCH Indebtedness	36




	Section 6.13. English Language	36

SECTION 7. Representations and Warranties		36




	Section 7.1. Corporate Status	36




	Section 7.2. Corporate Power	37




	Section 7.3. Governmental Approvals	37




	Section 7.4. No Violation	37




	Section 7.5. Proceedings	38




	Section 7.6. Taxes	38




	Section 7.7. Financial Statements	39




	Section 7.8. The Project	39




	Section 7.9. Environmental Matters	39




	Section 7.10. Transactions with Affiliates	40




	Section 7.11. Indebtedness	40




	Section 7.12. Properties	40




	Section 7.13. Intellectual Property	41




	Section 7.14. Books and Records	41




	Section 7.15. The Licenses	41




	Section 7.16. No Material Adverse Change	41




	Section 7.17. Insurance	41




	Section 7.18. INTENTIONALLY OMITTED	42




	Section 7.19. Investment Company; Public Utility Holding Company	42




	Section 7.20. Immunity	42




	Section 7.21. Margin Stock; Regulation U	42




	Section 7.22. Solvency	42




	Section 7.23. No Event of Default; Compliance with Material Agreements	42




	Section 7.24. Fees or Compensation	43




	Section 7.25. Termination of Lucent Agreements	43




	Section 7.26. True and Complete Disclosure	43

SECTION 8. Covenants		43




	Section 8.1. Affirmative Covenants	43


	Section 8.2. Negative Covenants	52




	Section 8.3. Financial Covenants	55

SECTION 9. EXCHANGE OPTIONS		57




	Section 9.1. Option to Exchange	57




	Section 9.2. Exchange Instruments	58

SECTION 10. Events Of Default		58




	Section 10.1. Events of Default	58




	Section 10.2. Remedies Upon Event of Default	63




	Section 10.3. Cumulative Rights	64

SECTION 11. Expenses And Indemnification		64




	Section 11.1. Expenses	64




	Section 11.2. Indemnification	65

SECTION 12. Assignment And Participation		65




	Section 12.1. Assignment	65




	Section 12.2. Participation	67




	Section 12.3. Information	67

SECTION 13. INTENTIONALLY OMITTED		67

SECTION 14. Governing Law and Jurisdiction		67




	Section 14.1. Governing Law	67
	Section 14.2. Waiver of Jury Trial	67




	Section 14.3. Jurisdiction; Venue for Suit	68




	Section 14.4. Waiver of Immunity	68




	Section 14.5. Process Agent	68




	Section 14.6. Legal Process in Other Jurisdictions	69

SECTION 15. The Administrative Agent		69




	Section 15.1. Authorization and Action	69




	Section 15.2. Agent’s Reliance	70




	Section 15.3. Lender Credit Decision	70




	Section 15.4. Lender Indemnification	70




	Section 15.5

SECTION 16. General Provisions		71




	Section 16.1. Notices	71




	Section 16.2. Severability of Provisions	71




	Section 16.3. Binding Effect; Successors and Assigns	71




	Section 16.4. Amendment; Waiver	71

iii


	Section 16.5. Entire Agreement			73




	Section 16.6. No Novation			73




	Section 16.7. Right of Set-Off			73




	Section 16.8. Release and Waiver			73




	Section 16.9. Further Assurances			74




	Section 16.10. Term of Agreement; Survival			74




	Section 16.11. Headings			74




	Section 16.12. Counterparts			74




	Section 16.13. Confidentiality			74




	Section 16.14. Cooperation			75

ACCOUNTS PAYABLE FINANCING AGREEMENT

THIS ACCOUNTS PAYABLE FINANCING AGREEMENT (this “Agreement”) dated as of March 25, 2003, by and among IMPSAT S.A., a corporation (sociedad anónima) organized pursuant to the laws of the Republic of Argentina (the “Borrower”); Nortel Networks Limited (formerly known as Nortel Networks Corporation) (“Nortel”), a corporation organized pursuant to the laws of the Province of Ontario, Canada, as administrative agent (the “Agent” or “Administrative Agent”); and the several lenders party hereto from time to time, as lenders (together with Nortel, the “Lenders”).

W I T N E S S E T H:

WHEREAS, the Borrower, Nortel, as administrative agent, Deutsche Bank Trust Company Americas, as collateral agent (the “Collateral Agent”) and certain lenders (including Nortel) (collectively the “Argentine Agreement Lenders”) are each party to an Amended and Restated Financing Agreement dated as of June 11, 2001 as amended pursuant to amendments dated as of October 25, 2001 and November 24, 2001 respectively (as the same may have been further amended, supplemented or otherwise modified, the “Existing Argentine Financing Agreement”);

WHEREAS, the Argentine Agreement Lenders made available to the Borrower under the terms and conditions of the Existing Argentine Financing Agreement a credit facility to assist in financing the purchase by the Borrower or its Affiliates of telecommunications equipment and services manufactured or supplied by Nortel or its Affiliates related to the design, procurement, installation, commissioning, and operation of a broadband telecommunications network in Argentina (the “Project”) under (i) a Turnkey Project Agreement by and among the Borrower, Nortel Networks de Argentina S.A. (“Nortel Argentina”) and Nortel dated as of September 6, 1999 (as amended, supplemented or otherwise modified from time to time, the “Turnkey Contract”) and (ii) a Supply Contract by and among the Borrower, Nortel Argentina, Nortel and certain Affiliates of Nortel and the Borrower dated as of November 5, 1999 (as amended, and restated as of May 30, 2002, the “Supply Agreement”) (the Turnkey Contract and the Supply Agreement, collectively, the “Nortel Contracts”);

WHEREAS, the Borrower is a Subsidiary of IMPSAT Fiber Networks, Inc. (formerly known as IMPSAT Corporation), a corporation organized pursuant to the laws of the State of Delaware, U.S.A. (“IMPSAT”);

WHEREAS, the Argentine Agreement Lenders, the Borrower and IMPSAT have agreed to restructure indebtedness outstanding under the Existing Argentina Financing Agreement pursuant to the terms of that certain Amended and Restated Financing Agreement, dated as of March 25, 2003 (as the same may be amended, supplemented or otherwise modified the “Restated Argentine Financing Agreement”) among the Borrower, the Argentine Agreement Lenders, the Administrative Agent and the Collateral Agent;

WHEREAS, in order to implement a restructuring of certain obligations of IMPSAT, the Borrower and other Subsidiaries of IMPSAT, IMPSAT filed (i) a voluntary petition for relief

under Chapter 11 of Title 11 of the United States Code on June 11, 2002 (the “Chapter 11 Proceedings”) and (ii) as part of such Chapter 11 Proceedings a disclosure statement and plan of reorganization (the “Plan”) (which was approved by the United States Bankruptcy Court for the Southern District of New York and subsequently confirmed on December 11, 2002);

WHEREAS, pursuant to the Nortel Contracts, the Borrower is obligated to pay an amount of $10,287,919 to Nortel Argentina, which amount represents the purchase price of certain telecommunications equipment and services manufactured or supplied by Nortel or its Affiliates and purchased by Borrower therefrom under the Nortel Contracts (the “Outstanding Accounts Payable”);

WHEREAS, prior to the date hereof, Nortel Argentina has transferred and assigned, and Nortel has assumed, the Outstanding Accounts Payable;

WHEREAS, Borrower and Nortel desire to restructure the Outstanding Accounts Payable, and evidence the payment obligations of Borrower in connection therewith, pursuant to this Agreement;

WHEREAS, it is the intent of the parties hereto that this Agreement not constitute a novation of the obligations and liabilities under the Nortel Contracts or evidence payment of all or any of such obligations or liabilities, that this Agreement shall hereafter evidence the payment obligations of the Borrower in respect of the Outstanding Accounts Payable and that from and after the Closing Date the purchase price obligations of Borrower in respect of the Outstanding Accounts Payable shall be evidenced by this Agreement, and the Nortel Contracts insofar as they set forth the obligations in respect of the outstanding Accounts Payable be of no further force or effect except as to evidence the incurrence of such obligations of the Borrower and IMPSAT thereunder and the representations and warranties made thereunder;

NOW, THEREFORE, in consideration of the premises and other good and valuable consideration, receipt of which is hereby acknowledged, the Parties agree as follows:

SECTION 1. DEFINITIONS.

Section 1.1. Defined Terms.

The following capitalized terms shall have the meanings set forth in this Section 1.1 when used in this Agreement, including its preamble and recitals:

“Affiliate” means, as to any Person (a) each Person that, directly or indirectly, owns or controls, whether beneficially, or as a trustee, guardian or other fiduciary, five percent (5%) or more of the Voting Stock of such Person, (b) each Person that controls, is controlled by or is under common control with, such Person and (c) in the case of individuals, the immediate family members, spouses and lineal descendants of individuals who are Affiliates of the Borrower or IMPSAT. For purposes of this definition, “control” of a Person shall mean the possession, directly or indirectly, of the power to direct or cause the direction of its management or policies, whether through the ownership of Voting Stock, by contract, by virtue of being an executive officer or a director or otherwise.

“Applicable Law” means any statute, law, regulation, ordinance, rule, judgment, writ, rule of common law, common law duty, code, order, decree, governmental approval, administrative order, directed duty, request, license, authorization, permit, approval, concession, grant, franchise, directive, guideline, policy, requirement, or other governmental restriction, or any similar form of decision of, determination by, agreement with, or requirements of (or any interpretation or administration of any of the foregoing by) any Governmental Authority, whether in effect as of the date hereof or thereafter (including any Environmental Laws).

“Argentina” means the Republic of Argentina.

“Argentine GAAP” means generally accepted accounting principles in Argentina as established from time to time by the Consejo Profesional de Ciencias Económicas.

“Assignment and Assumption Agreement” means an assignment and assumption agreement between a Lender and an Eligible Assignee, and accepted by the Administrative Agent, substantially in the form of Exhibit A.

“Authorized Officer” means, with respect to any Person, each of the following officers of such Person: (a) the Chief Executive Officer; (b) the Chief Financial Officer or (c) any other Person having substantially similar responsibilities and authority.

“BBVA” means BBVA Banco Frances S.A.

“Borrower Annual Operating Budget” means, with respect to each fiscal year of the Borrower beginning with its fiscal year ending on December 31, 2003, an annual operating budget delivered to the Lenders pursuant to Section 8.1(b)(6), with respect to such fiscal year.

“Borrower Business Plan” Unless and until the Borrower shall have delivered to the Lenders a revised or updated business plan in accordance with Sections 8.1(b)(2) or (5), means the six-year consolidated Business Plan of the Borrower dated as of December 15, 2002, and not including any subsequent amendments, supplements or replacements thereof.

“Borrower Capital Markets Transaction” means any public offering or private placement of debt securities of the Borrower or any of its Subsidiaries.

“Borrower’s Net Debt” means, on any date, (a) the Borrower’s Total Debt outstanding on such date (excluding all Indebtedness of others guaranteed by the Borrower); minus (b) the amount of the Intercompany Indebtedness of the Borrower evidenced by Subordinated Intercompany Notes outstanding on such date; minus (c) the aggregate amount of cash and Temporary Cash Investments of the Borrower and its Subsidiaries that are subject to a Lien in favor of the Argentine Agreement Lenders pursuant to the “Security Documents” (as defined in the Restated Argentine Financing Agreement).

“Brazil” means the Federative Republic of Brazil.

“Brazil Agreements” means, collectively, the Financing Documents as defined in the Nortel Brazil Financing Agreement and the Brazil Supply Agreement.

“Brazil Supply Agreement” means the Supply Contract dated as of November 5, 1999 (as amended from time to time) among IMPSAT Brazil, Nortel and Nortel Brazil.

“Business Day” means a day other than a Saturday, Sunday, or any other day on which commercial banks in New York City, United States of America, or the City of Buenos Aires, Argentina are authorized or required by Applicable Law to close.

“Business Plans” means, collectively, the Borrower Business Plan, the Borrower Annual Operating Budget and the IMPSAT Business Plan.

“Capital Adequacy Regulation” means any guideline, request or directive of any central bank or other Governmental Authority, or any other Applicable Law, whether or not having the force of law, in each case of general applicability regarding capital adequacy of banks and branches thereof or corporations controlling banks.

“Capital Expenditures” means, with respect to any Person for any period, the additions to property, plant and equipment and other capital expenditures of such Person and its Subsidiaries for such period, as the same are or would be set forth in a consolidated statement of cash flows of such Person and its Subsidiaries for such period.

“Capital Lease” means, with respect to any Person, any lease of (or other indebtedness arrangement conveying the right to use) any property (whether real, personal or mixed) by such Person as lessee that, in accordance with U.S. GAAP, would be required to be classified and accounted for as a capital lease or a liability on the balance sheet of such Person.

“Capital Stock” means, with respect to any Person, all shares, interests, rights to purchase, warrants, options, or other equivalents of or interests in the common or preferred equity of such Person.

“Central Bank” means the Banco Central de la República Argentina.

“Change of Control” means an event or circumstance as a result of which: (i) a “person” or “group” (within the meaning of Sections 13(d) and 14(d)(2) of the Exchange Act), other than a Permitted Investor or any Existing Securityholder or its Affiliates, becomes the ultimate “beneficial owner” (as defined in Rule 13d-3 under the Exchange Act) of Voting Stock representing more than thirty percent (30%) of the total voting power of the Voting Stock of IMPSAT on a fully diluted basis and such ownership represents a greater percentage of the total voting power of the Voting Stock of IMPSAT, on a fully diluted basis, than is held by the Existing Securityholders and their Affiliates on such date; (ii) individuals who on the date hereof constitute the board of directors of IMPSAT (together with any new directors whose election by the board of directors or whose nomination for election by IMPSAT’s stockholders was approved by a vote of at least two-thirds of the members of the board of directors of IMPSAT then in office who either were members of the board of directors of IMPSAT on the date hereof or whose election or nomination for election was previously so approved) cease for any reason to constitute a majority of the members of the board of directors of IMPSAT then in office; or

(iii) IMPSAT is the “beneficial owner” of less than fifty percent (50%) of the Voting Stock of the Borrower.

“Charter Documents” means, with respect to any Person (other than an individual), its founding act, charter, certificate of incorporation, by-laws, memorandum and articles of association, estatutos sociales and other similar documents regarding its organization or constitution.

“Closing Date” means the date on which all conditions set forth in Section 6 herein have been satisfied.

“Control” means: (a) the beneficial ownership of more than fifty percent (50%) of the total Voting Stock then outstanding of a Person; or (b) even if less than such percentage of outstanding Voting Stock is owned, the power to direct the management and policies of such Person, directly or through one or more intermediaries, whether through the ownership of voting securities, by contract, or otherwise.

“Current Assets” means, at any time, the total assets of the Borrower and its Subsidiaries which would be shown as current assets on a balance sheet of the Borrower and its Subsidiaries prepared in accordance with U.S. GAAP at such time, provided that in determining such current assets (a) notes and accounts receivable shall be included only if good and collectible and payable on demand or within one year from such date (and not by their terms or by the terms of any instrument or agreement relating thereto directly or indirectly renewable or extendible at the option of the obligor beyond such year) and shall be valued at their face value less reserves or accruals for uncollectible accounts determined to be sufficient in accordance with U.S. GAAP, and (b) life insurance policies (other than the cash surrender value of any unencumbered policies that is properly classified as a current asset in accordance with U.S. GAAP) shall be excluded.

“Current Liabilities” means, at any time, the total liabilities of the Borrower and its Subsidiaries which would be shown as current liabilities, including the current portion of long term Indebtedness, minus the current portion of deferred Revenue, on a balance sheet of the Borrower and its Subsidiaries prepared in accordance with U.S. GAAP.

“Debt Service” means, with respect to any Person for any period, the sum of (i) the total Interest Expense of such Person and its Subsidiaries during such period (excluding any original issue discount, interest paid in kind or amortized debt discount, to the extent included in determining Interest Expense), plus (ii) all amounts of principal and premium, if any, paid or required to be paid during such period in respect of Total Debt (excluding Indebtedness in respect of guarantees except to the extent paid by such Person during such period) of such Person and its Subsidiaries; provided, however, with respect to the determination of Excess Cash Flow, amounts of principal which are paid under revolving credit or similar facilities shall be counted, but only to the extent that any amounts so paid may not, by the terms of such revolving credit or similar facilities, be reborrowed or redrawn (or in the case of term Indebtedness with contractual rights of extension or roll-over to the extent that such extension or roll-over would be prohibited pursuant to the terms of this Agreement); and provided, further, with respect to the calculation of

the Debt Service Coverage Ratio contained in Section 8.3(b), amounts of principal which are paid under revolving credit or similar facilities and then reborrowed during the same calendar quarter shall be counted without duplication.

“Default” means any event, occurrence, factual or legal condition which, if continued uncured or unchanged would, with the passage of time or the giving of notice or both, become or constitute an Event of Default.

“Default Interest Rate” means an interest rate per annum equal to fourteen percent (14%) at any time after March 25, 2005.

“Disposal” means, with respect to any property (including, without limitation, all tangible and intangible assets and rights to payment) of the Borrower or any Subsidiary thereof, any direct or indirect sale, conveyance, transfer, alienation, lease, IRU, loan, sale-and-repurchase, sale-leaseback or other transaction or arrangement as a result of which the Borrower or Subsidiary party to such transaction or arrangement relinquishes all or substantially all marketable rights in and to such property; and the verb “Dispose of” has a corresponding meaning.

“Dollars and US$” means the lawful currency of the United States of America.

“EBITDA” means, with respect to any Person for any period, the Net Income of such Person and its Subsidiaries for such period after (a) restoring thereto amounts deducted in determining Net Income for such period including, without duplication, (1) Interest Expense for such period, (2) taxes based upon net income, (3) depreciation and amortization, and (4) other non-cash charges; (b) adding the amount that is contributed by IMPSAT to the Borrower’s Paid in Capital with respect to MU Expenses in compliance with the requirements of Section 8.1(o) for such period; and (c) deducting therefrom (1) non-cash income or losses to the extent included in determining Net Income and (2) deferred Revenues attributable to IRUs recognized as Revenues during such period.

“Eligible Assignees” means, prior to the occurrence of an Event of Default, any Person so long as such Person is not a direct competitor of the Borrower, and after the occurrence of an Event of Default, any Person.

“Environmental Laws” means any and all applicable statutes, laws, judicial decisions, regulations, ordinances, rules, judgments, orders, decrees, codes, injunctions, permits, concessions, grants, franchises, licenses, agreements, and other governmental restrictions relating to the environment or the effect of the environment on human health or to emissions, discharges or release of pollutants, contaminants, Hazardous Substances, or wastes into the environment, including (without limitation) ambient air, surface water, ground water, or land, or otherwise relating to the manufacture, processing, distribution, use, treatment, storage, disposal, transport, or handling of pollutants, contaminants, Hazardous Substances, or wastes or the clean-up or other remediation thereof.

“Environmental Liabilities” means all liabilities in connection with, or relating to, the business, assets, presently or previously owned or leased property, activities (including, without limitation, off-site disposal) or operations of the Borrower or any of its Subsidiaries, whether vested or unvested, contingent or fixed, actual or potential, known or unknown, which arise under or relate to matters covered by the Environmental Laws.

“Equipment” means (i) all equipment, hardware, materials, and other items of property together with all embedded firmware and hardwired logic, software (including computer programs contained on a magnetic or optical storage medium, in a semiconductor device, or in another memory device, or system memory or supplied on any other storage medium) used in the construction or operation of the Network, and (ii) any building infrastructure with respect to any facility necessary to house or hold any of the items referenced in the immediately preceding clause (i) (including grounding, air-conditioning systems (both general and special), fire alarm and extinguisher systems, elevators, water and sewer systems, uninterruptible power supply, main power boards, power distribution boards, towers and transformers, power generators, electrical rectifiers and batteries, cable and equipment ladders, trays and racks, technical floors, security systems and all other infrastructure subsystems required for the proper function of the Network), in each case purchased from Nortel and its Affiliates pursuant to the Nortel Contracts with the proceeds of the Existing Argentine Financing Agreement and the Financing Agreement dated as of October 25, 1999 (which was amended and restated by the Existing Argentine Financing Agreement) together with all replacements, components, parts, improvements and upgrades installed thereon or affixed thereto.

“Equity” means, with respect to any Person at any date, the consolidated stockholders’ equity of such Person and its Subsidiaries as of such date, determined in accordance with U.S. GAAP.

“Event of Sovereign Risk” means (a) failure by the Central Bank to exchange or to approve or permit the exchange of Pesos for Dollars, the unavailability of Dollars in any legal exchange market in Argentina in accordance with normal commercial practice, or any other action of any Argentine Governmental Authority that has the effect of restricting such exchange or the transfer of Pesos for Dollars outside Argentina and (b) a declaration of a banking moratorium or any suspension of payments by banks in Argentina, or the imposition by any Argentine Governmental Authority of any moratorium on the required rescheduling of or required approval of the payment of any indebtedness in Argentina.

“Excess Cash Flow” means, with respect to any Person, for any period: (a) such Person’s EBITDA for such period; minus (b) the sum of the following items, determined for such Person and its Subsidiaries on a consolidated basis: (i) Debt Service paid for such period, (ii) cash Capital Expenditures (net of any financing proceeds used to fund such Capital Expenditures) for such period (but by the Borrower only to the extent that the Borrower is in compliance with the covenant contained in Section 8.3(f)), (iii) the net increase (or minus any net decrease) in working capital, excluding cash included therein, from the opening of business on the first day, to the close of business on the last day, of such period, and (iv) taxes based upon net income payable with respect to such period paid in cash; provided, however, that in the case of the calculation of “Excess Cash Flow” for IMPSAT (x) this figure shall not include any such

positive amounts, but shall include any such negative amounts, in each case attributable to the Borrower or IMPSAT Brazil for such period and (y) the amount of Debt Service projected to be paid in accordance with the IMPSAT Business Plan during the fiscal year immediately following the fiscal year most recently ended for such period shall be deducted from what would otherwise be the result of the calculation of “Excess Cash Flow”.

“Exchange” means the exchange of $6,574,919 of Term Loans to Series B Convertible Notes in an aggregate principal amount of $1,689,000 plus the Warrants, pursuant to Section 9 hereof.

“Exchange Act” means the U.S. Securities Exchange Act of 1934, as amended.

“Exchange Agreement” shall mean that certain Exchange Agreement to be entered into between IMPSAT and Nortel in connection with the Exchange, substantially in the form of Exhibit F hereto.

“Exchange Assignment Agreement” shall mean the Assignment and Assumption Agreement to be entered into among Borrower, IMPSAT and Nortel in connection with the Exchange, substantially in the form of Exhibit G hereto.

“Existing Indebtedness” means, with respect to the definition of “Solvent,” the Indebtedness that is listed on Schedule 1.1, and with respect to Sections 8.1(j)(2), 8.2(n) and Sections 10.1(f)(1), 10.1(f)(2), 10.1(l)(1) and 10.1(l)(2), the Indebtedness listed on Schedule 10.1(f).

“Existing Securityholders” means each Person holding IMPSAT’s Capital Stock or securities of IMPSAT convertible into or exchangeable for IMPSAT’s Capital Stock, in each case, representing five percent (5%) or more of IMPSAT’s total Capital Stock on a fully diluted basis as of the Closing Date.

“Expropriation Event” means: (i) any taking by condemnation, nationalization, seizure, expropriation or other appropriation by any Governmental Authority of all or any material portion of the assets of the Borrower, (ii) any assumption by any Governmental Authority of control of all or any material portion of the assets of the Borrower or the business operations of the Borrower or any of its Subsidiaries or any of any such Person’s share capital, (iii) any taking of any action by a Governmental Authority which results in the involuntary dissolution or disestablishment of the Borrower or any of its Subsidiaries, or (iv) any taking of any action by any Governmental Authority that prevents the Borrower and its Subsidiaries, taken as a whole, from carrying on their business or operations or a material part thereof.

“Financing Documents” means this Agreement, the Notes, all Assignment and Assumption Agreements and any other instruments, documents and agreements executed by or on behalf of the Borrower or for the benefit of the Lenders in connection with the Term Loans.

“Governmental Approvals” means any authorization, consent, license (including, but not limited to, the Licenses), approval, grant, franchise, concession, identification number, lease, ruling, certification, exemption, action, filing, registration, permit, order, decree, sanction, or

other authorization of any nature to be granted by any Governmental Authority, as now or hereafter necessary under any Applicable Law.

“Governmental Authority” means any nation or government, any state or other political subdivision thereof (including, but not limited to, federal, national, state, provincial, regional and municipal) and any entity exercising executive, legislative, judicial, regulatory, or administrative authority or functions of, or pertaining to, government or any court or arbitrator.

“Hazardous Substance” means any substance, materials or waste subject to regulation, or that forms the basis of liability, under Environmental Laws because of its toxic, radioactive, caustic or otherwise dangerous or hazardous qualities.

“IMPSAT Brazil” means IMPSAT Comunicações Ltda., a company organized pursuant to the laws of Brazil.

“IMPSAT Business Plan” means the six-year consolidated business plan of IMPSAT and its Subsidiaries dated as of December 15, 2002 and not including any subsequent amendments, supplements or replacements thereof.

“IMPSAT Capital Markets Transaction” means (i) any public offering or private placement of debt securities of IMPSAT or (ii) any public offering or private placement of debt securities of any Subsidiary of IMPSAT (other than the Borrower or IMPSAT Brazil) which is guaranteed by IMPSAT, provided, however; the following shall not constitute IMPSAT Capital Markets Transactions: (a) any such offering described in clauses (i) or (ii) above, one hundred percent (100%) of the net proceeds of which are used to refinance Indebtedness of a Subsidiary of IMPSAT in existence on the date hereof; or (b) the commencement of any such offering described in clause (ii) above after the second anniversary of the Closing Date.

“IMPSAT Convertible Notes” means the Series A Convertible Notes and the Series B Convertible Notes.

“IMPSAT Exit Cash Balance” means, as of any date of determination, an amount equal to the greater of (a) zero Dollars (US$0.00) or (b) the result of (i) US$60,244,024 (representing the value of the aggregate cash and Temporary Cash Investments held by IMPSAT as of the Closing Date) less (ii) the aggregate amount of all expenditures and investments made by IMPSAT since the Closing Date.

“Indebtedness” means, with respect to any Person at any time and from time to time, the sum, without duplication, of the following: (a) all obligations of such Person for money borrowed (whether by loan, the issuance of debt securities or otherwise); (b) the available amount at such time of all letters of credit issued for the account of such Person and all outstanding reimbursement obligations with respect thereto; (c) all liabilities or obligations secured by any Lien on any property owned by such Person; (d) all capitalized lease obligations; (e) all Indebtedness of others guaranteed by such Person; (f) all obligations of such Person to pay the deferred purchase price or acquisition price of property or services, other than (1) Trade Payables and accrued expenses incurred owing by the Borrower to IMPSAT or any of its

Subsidiaries and (2) any other Trade Payables and accrued expenses incurred, that are not past due by more than sixty (60) days; (g) all obligations of such Person under trade or bankers’ acceptances or under agreements providing for swaps, ceiling rates, ceiling and floor rates, or contingent participation or other hedging mechanisms with respect to the payment of interest; and (h) all indebtedness, liabilities and obligations of such Person to redeem or retire shares of Capital Stock of such Person; provided, however, that the Outstanding Accounts Payable which are, pursuant to this Agreement, being restructured into the Term Loans shall not, on and after the Closing Date, be deemed to be Trade Payables.

“Independent Auditor” means with respect to IMPSAT, Deloitte & Touche LLP, and with respect to the Borrower, Deloitte & Touche Argentina or such other internationally recognized firm of certified public accountants as may be approved by the Administrative Agent.

“Intercompany Indebtedness” means all Indebtedness of the Borrower for money borrowed from IMPSAT or any of IMPSAT’s Subsidiaries, or any Indebtedness of any of the Borrower’s Subsidiaries for money borrowed from IMPSAT or any of IMPSAT’s Subsidiaries, including the Borrower.

“Intercompany Subordination Agreement” means any subordination agreement executed by the Borrower or any of its Subsidiaries and in substantially the form of Exhibit C.

“Interest Expense” means, with respect to any Person for any period, interest expense, both expensed and capitalized, of such Person and its Subsidiaries for such period, including accrued interest and the interest component of capital lease obligations, all commissions, discounts, fees and charges (excluding interest expense in respect of guarantees except to the extent paid by such Person during such period).

“Interest Payment Date” means, initially, September 25, 2005 and each successive date that is six (6) calendar months thereafter (being the same day of the calendar month) until the Maturity Date.

“Investment” means the acquisition of any Capital Stock, partnership or other equity interests, evidence of Indebtedness, securities (including any option, warrant or other right to acquire any of the foregoing) of, the making of any loans or advances to, the guaranteeing of any obligations of any Person, or the purchase or other acquisition (in one transaction or a series of transactions) of any assets constituting a business unit.

“IRU” means the creation of an indefeasible right of use of any portion of the Borrower’s telecommunications network by the Borrower or any Subsidiary thereof, including, but not limited to, an usufructo under Argentine law which provides for either (a) a Lien or a real property interest in favor of the grantee or customer thereof or (b) provides for payment to the Borrower or any Subsidiary of the Borrower in a form other than periodic payments at quarterly or more frequent intervals and is for a term of more than five years.

“IRU Cost” means: (i) for any Permitted IRU granted in respect of any duct, the number of kilometers of duct subject to the IRU, multiplied by (A) in the case of a Long Haul IRU, four

thousand two hundred seventy eight and 06/100 Dollars (US$4,278.06) and (B) in the case of Metropolitan IRU, twenty two thousand six hundred sixty four and 32/100 Dollars (US$22,664.32); and (ii) for any Permitted IRU granted in respect of fiber optic cable, the number of kilometers of fiber optic cable subject to the IRU multiplied by the product of one hundred fifteen Dollars (US$115.00) and the number of strands of fiber optic cable over which the IRU is granted.

“ISCH” means International Satellite Communications Holding Ltd.

“ISCH Letter Agreement” means the Letter Agreement dated May 31, 2002, by and among ISCH, Nortel, Deutsche Bank Trust Company Americas and IMPSAT.

“Lending Office” means, with respect to any Lender, the office of that Lender designated as its Lending Office by notice to the Administrative Agent and the Borrower.

“Licenses” means the Spectrum Authorization and the other licenses listed in Schedule 7.15 and such other licenses, concessions, authorizations, permits, or the like (including any additions or amendments thereto) issued or granted by the SC or any other Governmental Authority from time to time in favor of the Borrower or any of its Subsidiaries and required for the completion of the Project, the operation of the Network and the conduct of the Telecommunications Business.

“Lien” means, with respect to any Person, any security interest, lien, pledge, mortgage, charge, or encumbrance (including any agreement to give any of the foregoing), title retention agreement, finance lease or trust receipt, or a consignment or bailment for security purposes, or other security arrangement or any other arrangement on or with respect to any asset or revenue of such Person.

“Long Haul IRU” means an IRU which is not a Metropolitan IRU.

“Lucent Argentina” means Lucent Technologies S.A. Argentina.

“Lucent Argentina 2000 Financing Agreement” means the Financing Agreement dated as of September 29, 2000, as amended and restated as of June 11, 2001, among the Borrower, Lucent Argentina, as a lender and as administrative agent, Bankers Trust Company, as collateral agent, and the other lenders party thereto from time to time, pursuant to which Lucent Argentina has made available to the Borrower a credit facility in a principal amount not to exceed sixteen million Dollars (US$16,000,000) to finance the purchase of certain products and services from Lucent Argentina and/or its Affiliates for construction and operation of the Project.

“Material Adverse Change” means an event, circumstance or development of whatever nature that has had or could reasonably be expected to have a Material Adverse Effect.

“Material Adverse Effect” means a material adverse effect on (a) the business, assets, results of operations, condition (financial or otherwise) or prospects of the Borrower and its Subsidiaries, taken as a whole, or IMPSAT; (b) the ability of the Borrower or IMPSAT to perform their respective obligations under any of the Project Agreements; (c) the rights and

remedies of the Lenders or the Agent under the Financing Documents or under any of the Financing Documents as defined in the Restated Argentine Financing Agreement; (d) the validity or enforceability of this Agreement or any of the other Project Agreements; or (e) the Licenses or the rights of the Borrower and its Subsidiaries thereunder.

“Material Agreements” With respect to any Person, each contract to which such Person is a party involving aggregate consideration payable to or by such Person of US$2,500,000.00 or more in any 12-month period or otherwise material to the business, condition (financial or otherwise), operations, performance, properties or prospect of such Person.

“Material Subsidiary” means, with respect to any Person, any Subsidiary of such Person that, together with its Subsidiaries, (i) for the most recent fiscal year of such Person, accounted for more than 10% of the consolidated revenues of such Person or (ii) as of the end of such fiscal year, was the owner of more than 10% of the consolidated assets of such Person, all as set forth on the most recently available consolidated financial statements of such Person for such fiscal year.

“Maturity Date” means March 25, 2009.

“Metropolitan IRU” means an IRU granted in respect of a portion of the Network which is located within one of the metropolitan areas of Buenos Aires, ▇▇▇▇▇▇▇, Cordoba and ▇▇▇▇▇▇▇.

“MU Expenses” means, for any period, the salary, Selling G&A and other expenses of the Borrower which are properly attributable to the employment and activities during such period of IMPSAT management personnel employed by the Borrower.

“Net Income” means, for any period, the net income (loss) of a Person and its Subsidiaries, determined on a consolidated basis, for such period in accordance with U.S. GAAP.

“Net Proceeds” means, with respect to any event (a) the proceeds received in respect of such event in the form of cash and Temporary Cash Investments, including (i) any cash received in respect of any non-cash proceeds, but only as and when received, (ii) in the case of an insured casualty event, insurance proceeds, and (iii) in the case of an Expropriation Event or similar event, expropriation awards and similar payments, net of (b) the sum of (i) all reasonable fees and out-of-pocket expenses paid by the Borrower and its Subsidiaries to third parties other than IMPSAT or its Subsidiaries in connection with such event, (ii) in the case of a Disposal, the amount of all payments required to be made by the Borrower and its Subsidiaries as a result of such event to repay Indebtedness (other than Indebtedness secured under the Security Documents) secured by the asset or property Disposed of or otherwise subject to mandatory prepayment as a result of such event, (iii) the amount of all taxes paid (or reasonably estimated to be payable) by the Borrower and its Subsidiaries as a direct result of any gain recognized in connection with such event, and (iv) the amount of any reserves established by the Borrower and its Subsidiaries to fund contingent liabilities reasonably estimated to be payable, in each case during the year that such event occurred or the next succeeding year and that are directly attributable to such event (as determined reasonably and in good faith by the chief financial officer of the Borrower in conformity with U.S. GAAP); provided, however, that evidence with

respect to (b)(i) through (iv) is provided to the Administrative Agent in form and substance reasonably satisfactory to it.

“Net Proceeds Account” means the net proceeds account to be established by the Agent for the purpose of holding Net Proceeds in the circumstances contemplated in Section 3.2(a)(2).

“Network” means the broadband telecommunications network in Argentina operated by the Borrower and certain of their Affiliates that was constructed by Nortel and its Affiliates pursuant to the Turnkey Contract.

“Nortel Brazil” means Northern Telecom do Brasil Comercio e Servicos Ltda.

“Nortel Brazil Financing Agreement” means the Amended and Restated Financing Agreement dated as of March 25, 2003, by and among IMPSAT Brazil, Nortel and IMPSAT.

“Note” means a promissory note of the Borrower, substantially in the form of Exhibit D, provided, however, that at the request of any Lender, all Term Loans to be made by such Lender may be evidenced by promissory notes of the Borrower in a form different from Exhibit D if the purpose of such request is that such Notes be capable of characterization as executive instruments (“títulos ejecutivos”) under Argentine law and if the alternate form of Note is approved by the Agent, which approval shall not be unreasonably withheld.

“Obligations” means all present and future obligations, liabilities and other amounts, whether or not contingent, owing to any Lender pursuant to this Agreement or any other Financing Document, including principal, accrued interest and fees.

“Paid in Capital” means, with respect to any Person, at any time, the aggregate amount of capital contributed to such Person in the form of cash or capitalized Indebtedness; provided, that in the case of the Borrower, “Paid in Capital” means the sum of (x) four hundred twenty three million eight hundred sixty eight thousand Dollars (US$423,868,000) plus (y) the aggregate amount of capital contributed to the Borrower in the form of cash or capitalized Indebtedness after the Closing Date.

“Party” means the Borrower, each Lender, and the Administrative Agent, individually, and “Parties” means two (2) or more of them.

“Permitted Disposals” means, with respect to the Borrower or any Subsidiary thereof: (a) any Disposal in the ordinary course of business of assets which are obsolete or which are replaced in the ordinary course of business; (b) any Disposal of the assets of a Subsidiary of the Borrower to the Borrower or another Subsidiary of the Borrower, or any Disposal of the assets of the Borrower to one of its Subsidiaries, provided that any such assets that are subject to a security interest in favor of the Administrative Agent on behalf of the Lenders must remain subject to such security interest after such Disposal; (c) any Disposal of inventory in the ordinary course of business; (d) the Disposals listed on Schedule 1.1(b); (e) Permitted IRUs; (f) any Disposal of assets (other than IRUs) not constituting “Collateral” (as defined in the Restated Argentine Financing Agreement) for their fair market value as determined in good faith by the Borrower, the aggregate proceeds of which do not exceed US$2,000,000; and (g) any IRU of the

type referred to in clause (a) of the definition of “IRU” with respect to assets not constituting “Collateral” (as defined in the Restated Argentine Financing Agreement) for fair market value as determined in good faith by the Borrower, the aggregate proceeds of which do not exceed US$2,000,000 for each such IRU.

“Permitted Indebtedness” means (a) Indebtedness pursuant to the Financing Documents; (b) Intercompany Indebtedness, provided, that such Intercompany Indebtedness is evidenced by a Subordinated Intercompany Note; (c) contingent Indebtedness in respect of bonds or letters of credit provided to guarantee bids or performance under contracts in the ordinary course of business; (d) Indebtedness of the Borrower which is in existence on the Closing Date and set forth on Schedule 7.11; (e) purchase money Indebtedness and Capital Lease obligations in an amount not greater than US$5,000,000 in the aggregate outstanding at any one time; provided that the maximum amount of such Indebtedness owing to any one lender and its Affiliates shall not exceed US$1,000,000; (f) purchase money Indebtedness and Capital Lease obligations in an amount not greater than the result of (i) US$25,000,000 less (ii) any outstanding Indebtedness incurred pursuant to clause (e) above, in the aggregate outstanding at any one time; provided that such Indebtedness has a final maturity date equal to or later than the final maturity date of, and has an average life to maturity equal to or greater than the average life to maturity of, the Indebtedness pursuant to the Financing Documents; (g) unsecured Indebtedness incurred for the operation and maintenance of such Person’s Telecommunications Business, including, without limitation, for working capital purposes, in an amount outstanding at any time not greater than US$10,000,000 in the aggregate; (h) Indebtedness of the Borrower for money borrowed from financial institutions which Indebtedness is either fully collateralized by cash deposits of IMPSAT or fully funded by IMPSAT through the acquisition of one hundred percent (100%) participation in such Indebtedness from such financial institution, provided that such Indebtedness is either (i) non-recourse with respect to the Borrower or any of its assets or (ii) subordinated to the Obligations pursuant to a subordination agreement in form and substance satisfactory to the Required Lenders; and (i) Indebtedness incurred and applied to refinance Indebtedness permitted by each of clauses (a) and (d) above; provided, however, that with respect to any such refinancing Indebtedness, (1) the principal amount of such refinancing Indebtedness does not exceed the principal amount of the Indebtedness so refinanced; (2) such refinancing Indebtedness has a final maturity date equal to or later than the final maturity date of, and has an average life to maturity equal to or greater than the average life to maturity of, the Indebtedness being refinanced; and (3) such Indebtedness is incurred and/or guaranteed by the Borrower and any Subsidiary which has incurred or guaranteed, as the case may be, the Indebtedness to be refinanced.

“Permitted Investments” means: (a) Investments which are in existence on the Closing Date and set forth on Schedule 1.1(a); (b) Temporary Cash Investments; (c) Investments in the form of Intercompany Indebtedness which constitutes Permitted Indebtedness; (d) accounts receivable owing to the Borrower or any Subsidiary thereof if created or acquired in the ordinary course of business and payable or dischargeable in accordance with customary trade terms; (e) payroll, travel and similar advances and advances to suppliers to cover matters that are expected at the time of such advances ultimately to be treated as expenses for accounting purposes and that are made in the ordinary course of business and in the aggregate do not at any time exceed US$1,000,000; and (f) stock, obligations or securities received in satisfaction of

judgments, work-outs, assignments for the benefit of creditors or other similar judicial proceedings.

“Permitted Investor” means (a) any Person that is in the Telecommunications Business and (x) for its last four consecutive fiscal quarters has generated revenues of at least one billion Dollars (US$1,000,000,000) or earnings before interest, income taxes, depreciation and amortization of at least one hundred eighty million Dollars (US$180,000,000), or (y) on the date of determination has an equity market capitalization of at least three billion Dollars (US$3,000,000,000) or (b) any Subsidiary of such Person.

“Permitted IRU” means: (a) an IRU of the type referred to in clause (b) of the definition of “IRU” or (b) an IRU of the type referred to in clause (a) of the definition of “IRU”, with respect to any portion of the Network with an IRU Cost of two million Dollars (US$2,000,000) or less for each such IRU; provided, however, that the maximum number of ducts that may be subject to Permitted IRUs shall be three (3) (including the IRU granted by the Borrower to South American Crossing Ltd. in respect of one duct on the Network between Buenos Aries and ▇▇▇▇▇▇▇ in accordance with Article 2 of the TAC Turnkey Construction and IRU Agreement among the Borrower, IMPSAT S.A. (Chile) and South American Crossing Ltd. dated September 22, 1999) in the case of Long Haul IRUs, and four (4) in the case of Metropolitan IRUs.

“Permitted Liens” means:

(a) Liens under the Financing Documents;

(b) Liens securing taxes not yet due or being contested in good faith by appropriate proceedings diligently conducted for which adequate cash reserves determined in accordance with Argentine GAAP have been established (and as to which the property subject to any such Lien is not yet subject to foreclosure, seizure, arrest, sale, collection, levy or loss on account thereof) and so long as (x) the contesting of, or failure to comply with, such requirements does not in any material way jeopardize such Person’s ability or authority to operate all or any part of its business or value and (y) all such contests of, and failures to comply with, such requirements would not in the aggregate have an Material Adverse Effect;

(c) nonconsensual statutory Liens which are imposed by Applicable Law arising in the ordinary course of business and securing obligations which are not yet due and payable or which are being contested in good faith by appropriate proceedings diligently conducted for which adequate cash reserves determined in accordance with Argentine GAAP have been established (and as to which the property subject to any such Lien is not yet subject to foreclosure, sale or loss on account thereof) and so long as (x) the contesting of, or failure to comply with, such requirements does not in any material way jeopardize such Person’s ability or authority to operate all or any part of its business or value and (y) all such contests of, and failures to comply with, such requirements would not in the aggregate have an Material Adverse Effect;

(d) pledges or deposits made in the ordinary course of business to secure payment of worker’s compensation insurance, unemployment insurance, pensions or social security programs;

(e) easements, rights-of-way, restrictions and other similar encumbrances on real property which, in the aggregate, are not substantial in amount and which do not in any case materially detract from the value of the property to the Borrower or materially interfere with the ordinary conduct of the business of the Borrower or a Subsidiary;

(f) Liens arising by virtue of any Applicable Law in favor of banks or other financial institutions on cash or rights of setoff or similar rights as to deposit accounts or other funds maintained with a creditor depository institution;

(g) Liens on goods (and the documents of title relating thereto) the purchase price, shipment or storage of which is financed by a documentary letter credit issued for the account of the Borrower or a Subsidiary thereof in the ordinary course of business, provided that such Lien secures only the obligations of the Borrower or such Subsidiary in respect of such letter of credit;

(h) Liens created pursuant to Capital Leases;

(i) Liens in favor of customs and revenue authorities arising as a matter of Applicable Law to secure payment of customs duties in connection with the importation of goods in the ordinary course of business (and as to which the property subject to any such Lien is not yet subject to foreclosure, seizure, arrest, sale, collection, levy or loss on account thereof);

(j) Liens incurred or deposits made to secure the performance of tenders, bids, leases, statutory or regulatory obligations, bankers’ acceptances, surety and appeal bonds, contracts (other than for Indebtedness), performance and return-of-money bonds and other obligations of a similar nature incurred in the ordinary course of business (exclusive of obligations for the payment of borrowed money);

(k) Liens (including extensions and renewals thereof) upon real or personal property, in each case other than in respect of the Network; provided, however, that (i) such Lien is created solely for the purpose of securing Indebtedness incurred to finance the cost (including the cost of design, development, acquisition, construction, installation, improvement, transportation or integration) of the item of property or assets subject thereto and such Lien is created prior to, at the time of or within one hundred eighty (180) days after the later of the acquisition, the completion of construction or the commencement of full operation of such property, (ii) the principal amount of the Indebtedness secured by such Lien does not exceed one hundred percent (100%) of such cost and (iii) any such Lien shall not extend to or cover any property or assets other than such item of property or assets and any improvements on such item;

(l) Liens arising from the rendering of a final judgment or order against the Borrower or any of its Subsidiaries that does not give rise to an Event of Default;

(m) Liens in respect of (i) Permitted IRUs referred to in clause (b) of the definition of “Permitted IRU” and (ii) Permitted Disposals referred to in clause (g) of the definition of “Permitted Disposals”; and

(n) Liens existing on the Closing Date and listed on Schedule 7.12(a).

“Person” means an individual, a partnership, a joint venture, a corporation, a trust, a limited liability company, an unincorporated organization or a Governmental Authority.

“Pesos” means the lawful currency of Argentina.

“Prepayment Event” means (a) any Disposal by the Borrower or any of its Subsidiaries of any of such Person’s properties or assets, whether tangible or intangible, other than a Permitted Disposal or any other Disposal permitted to be made under Section 8.2(j); (b) any Expropriation Event; and (c) any casualty or other insured damage to any material asset of the Borrower or any Subsidiary thereof.

“Principal Repayment Date” means, initially, March 25, 2005 and each successive date that is six (6) calendar months thereafter (being the same day of the calendar month) until the Maturity Date.

“Project Agreements” means the Financing Documents, the Supply Agreement and the other agreements entered into by the Borrower and its Subsidiaries with Nortel or its Affiliates in connection with the Project.

“Project Party” means any party to a Project Agreement.

“Required Lenders” means, at any time, Lenders holding more than fifty percent (50%) in aggregate principal amount of the Term Loans then outstanding.

“Revenues” means, with respect to any Person for any period, the consolidated revenues of such Person and its Subsidiaries.

“SC” means the Argentine Secretariat of Communications (“Secretaría de Comunicaciones”).

“Securities Act” means the U.S. Securities Act of 1933, as amended.

“Series A Convertible Notes” means the Guaranteed Convertible Senior Notes — Series A issued by IMPSAT in accordance with the Plan on the Closing Date to the holders of the senior notes issued in connection with the 2003 Indenture.

“Series B Convertible Notes” means the Guaranteed Convertible Senior Notes — Series B issued by IMPSAT in accordance with the Plan on the Closing Date to Nortel and BBVA.

“Solvent” means with respect to any Person on a particular date, that on such date (a) the fair value of the property of such Person is greater than the total amount of liabilities, including

contingent liabilities, of such Person; (b) the present fair salable value of the assets of such Person is not less than the amount that will be required to pay the probable liability of such Person on its debts as they become absolute and matured; (c) such Person does not intend to, and does not believe that it will, incur debts or liabilities beyond such Person’s ability to pay as such debts and liabilities mature; and (d) such Person is not engaged in a business or transaction, and is not about to engage in a business or transaction, for which such Person’s property would constitute an unreasonably small capital. The amount of contingent liabilities (such as litigation, guarantees and pension plan liabilities) at any time shall be computed as the amount which, in light of all facts and circumstances existing at the time, represents the amount which can reasonably be expected to become an actual or matured liability. Notwithstanding the foregoing, the determination of the “Solvency” of the Borrower and IMPSAT shall be made without reference to any defaults under the Existing Argentine Financing Agreement existing immediately prior to the Closing Date or any Existing Indebtedness.

“Spectrum Authorization” means the authorization granted by the SC, revocable in nature, to use the radioelectric spectrum in accordance with the Argentine Telecommunications Law 19,798, as it may be amended from time to time.

“Subordinated Intercompany Note” means a promissory note of the Borrower, or any Subsidiary of the Borrower, in form and substance satisfactory to the Lenders, evidencing Intercompany Indebtedness of the Borrower for money borrowed from IMPSAT or any of the Borrower’s Subsidiaries, or evidencing Indebtedness of any of the Borrower’s Subsidiaries for money borrowed from the Borrower, any other Subsidiary of the Borrower or IMPSAT, which is subordinated pursuant to an Intercompany Subordination Agreement.

“Subsidiary” means, with respect to any Person, any other Person that is directly or indirectly Controlled by the first Person.

“Telecommunications Business” means telecommunications services, value added telecommunications services, radio paging, mobile telecommunications, personal telecommunications services, trunking, transport of broadcasting signals, information technology, Internet services and related and ancillary services in Argentina in which the Borrower or any of its Subsidiaries is from time to time engaged.

“Temporary Cash Investment” means any of the following: (a) direct obligations of the United States of America or any agency thereof or obligations fully and unconditionally guaranteed by the United States of America or any agency thereof; (b) time deposit accounts, certificates of deposit and money market deposits maturing within one year of the date of acquisition thereof issued by a bank or trust company which is organized under the laws of the United States of America, any state thereof or any foreign country recognized by the United States of America, and which bank or trust company has capital, surplus and undivided profits aggregating in excess of two hundred fifty million Dollars (US$250,000,000) (or the foreign currency equivalent thereof) and has outstanding debt which is rated “A” (or such similar equivalent rating) or higher by at least one nationally recognized statistical rating organization (as defined in Rule 436 under the Securities Act) or any money market fund sponsored by a registered broker dealer or mutual fund distributor; (c) repurchase obligations with a term of not

more than thirty (30) days for underlying securities of the types described in clause (a) above entered into with a bank meeting the qualifications described in clause (b) above; (d) commercial paper, maturing not more than ninety (90) days after the date of acquisition, issued by a corporation (other than an Affiliate of the Borrower) organized and in existence under the laws of the United States of America, any state thereof or any foreign country recognized by the United States of America with a rating the time as of which any investment therein is made of “P-1” (or higher) according to ▇▇▇▇▇’▇ Investor Service, Inc. (“Moody’s”) or “A-1” (or higher) according to Standard & Poor’s Ratings Services (“S&P”); (e) securities with maturities of six (6) months or less from the date of acquisition issued or fully and unconditionally guaranteed by any state, commonwealth or territory of the United States of America, or by any political subdivision or taxing authority thereof, and rated at least “A” by S&P or Moody’s and (f) certificates of deposit maturing not more than one (1) year after the acquisition thereof by the Borrower or a Subsidiary thereof and issued by any of the ten (10) largest banks (based on assets as the last December 31) organized under the laws of Argentina; provided, however, that such bank is not under intervention, receivership or any similar arrangement at the time of the acquisition of such certificate of deposit, and provided further, that at no time shall the aggregate outstanding amount of such certificates of deposit exceed five percent (5%) of the Borrower’s Revenue for the immediately preceding fiscal year unless so required by the Central Bank.

“Total Debt” means, with respect to any Person at any time and from time to time, the aggregate amount of any and all Indebtedness of such Person and its Subsidiaries then outstanding.

“Trade Payables” means, with respect to any Person, any accounts payable or any other indebtedness or monetary obligation to trade creditors created, assumed or guaranteed by such Person or any of its Subsidiaries arising in the ordinary course of business in connection with the acquisition of goods or services and required to be paid within one year.

“U.S. GAAP” means generally accepted accounting principles as promulgated or adopted by the Financial Accounting Standards Board of the American Institute of Certified Public Accountants and its predecessors, consistently applied.

“Voting Stock” means, with respect to any Person, Capital Stock ordinarily having the power to vote for the election of directors, managers or other voting members of the governing body of such Person.

“Warrant Agreement” means the Warrant Agreement between IMPSAT and the Administrative Agent, on behalf of the Lenders, substantially in the form of Exhibit H hereto.

“Warrants” means the warrants to purchase 101,934 shares of common stock of IMPSAT on a fully-diluted basis issued by IMPSAT to the Lenders in accordance with the terms of the Plan on the Closing Date.

“2003 Indenture” means the Indenture dated as of July 30, 1996 among IMPSAT, as Issuer, the Borrower, as Guarantor, and The Bank of New York, as Trustee, relating to the 12 1/8% Senior Guaranteed Notes due 2003 of IMPSAT.

Section 1.2. Other Definitions.

The following terms shall have the meaning given to them in the Section indicated below:


Term		Section
Administrative Agent		Preamble
Agreement		Preamble
Amendment		8.2(e)
Argentine Agreement Lenders		Preamble
Bankruptcy Code		10.1(g)
Borrower		Preamble
Collateral Agent		Preamble
Deferred Payment Date		4.2(c)
Event of Default		10.1
Exchange Date		9.2(a)
Exchange Option		9.2
Excluded Taxes		5.1(a)
Existing Argentine Financing Agreement		First Recital
FRBs		4.2(b)
IMPSAT		Third Recital
Indemnitees		11.2
Information		16.13
Lenders		Preamble
Nortel		Preamble
Nortel Argentina		Second Recital
Nortel Contracts		Second Recital
Note(s)		2.2(a)
Outstanding Accounts Payable		Sixth Recital
Par Bonds		4.2(b)
Plan		Fifth Recital
Prepayment		3.2(a)
Project		Second Recital
Reference Dealers		4.2(b)
Register		2.1(b)
Second Currency		4.1
Sovereign Event Deferral Period		4.2(c)
Specified Place of Payment		4.1
Supply Agreement		Second Recital
Syndication Agents		16.14
Taxes		5.1(a)
Term Loan(s)		2.1(a)
Turnkey Contract		Second Recital

Section 1.3. Interpretation.

In this Agreement: (a) the singular includes the plural and the plural the singular; (b) words importing any gender include the other gender; (c) references to statutes or regulations are to be construed as including all statutory or regulatory provisions consolidating, amending or replacing the statute or regulation referred thereto; (d) references to “writing” include printing, typing, lithography and other means of reproducing words in a tangible visible form; (e) references to articles, sections (or subdivisions of sections), exhibits, annexes or schedules are to this Agreement unless otherwise indicated; (f) references to agreements and other contractual instruments shall be deemed to include all schedules and exhibits to such agreements and all subsequent amendments and other modifications to such agreements and contractual instruments, but only to the extent such amendments and other modifications are not prohibited by the terms hereof; (g) references to Persons include their respective permitted successors and assigns and, in the case of Governmental Authorities, Persons succeeding to their respective functions and capacities, and (h) the terms “date of this Agreement” and “date hereof” mean March 25, 2003.

Section 1.4. Accounting Principles and Terms.

Except as otherwise provided in this Agreement: (a) all computations and determinations as to financial matters, and all financial statements to be delivered under this Agreement, shall be made or prepared in accordance with U.S. GAAP; (b) with respect to accounting terms or financial information defined or described in reference to a Person and its Subsidiaries, all such terms and information shall be construed as applying to such Person and its Subsidiaries on a consolidated basis in accordance with U.S. GAAP; and (c) all accounting terms used in this Agreement shall have the meanings respectively ascribed to such terms by U.S. GAAP.

SECTION 2. THE CREDIT FACILITY

Section 2.1. Loans.

(a) Conversion of Outstanding Accounts Payable to Loan. Each Lender severally agrees, upon the terms and conditions set forth herein, effective on the Closing Date to restructure and convert the Outstanding Accounts Payable to a loan (each a “Term Loan” and collectively the “Term Loans”) in an aggregate principal amount equal to $10,287,919. Any amounts that are repaid or prepaid may not be reborrowed. The aggregate principal amount of all Term Loans on the Closing Date and thereafter shall not exceed $10,287,919.

(b) Register. The Administrative Agent shall maintain at its address a register (the “Register”) on which it shall record, from time to time, the names and addresses of the Lenders, the amount of the Term Loans held by each Lender and each repayment and prepayment in respect of the Term Loans of each Lender. The entries made on the Register shall, to the extent permitted by Applicable Law, be prima facie evidence of the existence and amounts of the Obligations therein recorded, and the Borrower, the Agent and the Lenders shall treat each Person whose name is recorded in the Register as the owner of a Term Loan or Note hereunder as the owner thereof for all purposes of this Agreement, notwithstanding any notice to the contrary; provided, however, that the failure of the Administrative Agent to maintain the

Register or any error therein shall not in any manner affect the obligation of the Borrower to repay (with applicable interest) the Term Loans of such Lender in accordance with the terms of this Agreement. The Register shall be available for inspection by the Borrower and any Lender at any reasonable time and from time to time upon reasonable prior notice.

Section 2.2. Notes.

(a) Execution and Delivery. The Borrower’s obligation to pay the principal of, and interest on, each Term Loan made by each Lender shall be evidenced by a Note duly executed and delivered by the Borrower to the Administrative Agent and payable to the order of the relevant Lender. Each Note shall be entitled to the benefits of this Agreement and the other Financing Documents and (subject to variations in form approved by the Agent as provided in the definition of “Note” contained herein) shall (1) be dated the date hereof; (2) be in a stated principal amount equal to such Lender’s pro rata share of the aggregate amount of Term Loans into which the Outstanding Accounts Payable were converted on the Closing Date, as set forth on Schedule 2.2; (3) be payable in installments as provided in Section 3.1; and (4) bear interest as provided in Section 3.3. The Administrative Agent shall deliver to each Lender each Note payable to such Lender.

(b) Release. Each Note shall be surrendered to the Borrower against final payment thereof on the Maturity Date or such earlier date as the Term Loans are paid in full.

(c) Interpretation. In the event of any inconsistencies between this Agreement and any Note, the terms of this Agreement shall control; provided, however, that nothing in this clause (c) shall limit the rights of any Lender to bring any action or enforce its rights or remedies under any Note.

SECTION 3. PAYMENT OF PRINCIPAL, INTEREST AND FEES

Section 3.1. Repayment of Principal.

The principal amount of each Term Loan shall be repaid by the Borrower in nine (9) consecutive semi-annual installments on the Principal Repayment Dates of which each but the last shall be equal in amount, and the final installment shall be the aggregate of the then outstanding principal amount of all Term Loans. In addition, all accrued and unpaid interest thereon, all fees and other amounts owed hereunder and all other Obligations of the Borrower then outstanding and shall be payable on the Maturity Date. The amount of each principal installment of the Term Loans, other than the final installment, shall be equal to US$1,143,102.11.

Section 3.2. Prepayments.

(a) Mandatory Prepayments.

The Borrower shall prepay the principal amount of the Term Loans, in whole or in part, together with interest accrued thereon to the date of prepayment (each such prepayment, a “Prepayment”) upon the occurrence of any of the following events, as follows:

(1) Illegality. The Borrower shall make Prepayments on the dates and in the amounts specified in Section 5.2(a) if so required pursuant to such Section; provided, however, that in no event shall the amount payable in respect of this clause (1) exceed the product of the outstanding principal amount as of the date of such Prepayment multiplied by the percentage shown on the Claimed Amount Schedule as of the relevant date on which such Prepayment is made.

(2) Prepayment Events. The Borrower shall make Prepayments under this Subsection 3.2(a)(2), Subsection 3.2(a)(2) of the Restated Argentine Financing Agreement and Subsection 3.2(a)(2) of the Restated Argentine Financing Agreement and Subsection 3.2(a)(2) of that certain Financing Agreement between the Borrower and BBVA dated as of March 25, 2003 (the “BBVA Financing Agreement”) upon the receipt of Net Proceeds in respect of any Prepayment Event in an amount equal to such Net Proceeds, which Prepayment shall be applied among this Subsection 3.2(a)(2), Subsection 3.2(a)(2) of the Restated Argentine Financing Agreement and Subsection 3.2(a)(2) of the BBVA Financing Agreement pro rata based on (x) the then outstanding balance of the Term Loans, (y) the then outstanding balance of the term loans under the Restated Argentine Financing Agreement and (z) the then outstanding balance of the term loans under the BBVA Financing Agreement; provided, however, that in the case of a Prepayment Event consisting of a casualty or other insured damage, the Borrower shall not be subject to such prepayment obligation if no Default or Event of Default has occurred and is continuing and (i) if the property that was the subject of such casualty or damage is subject to a Lien permitted under paragraph (l) of the definition of “Permitted Liens” and the Person secured by such Lien is named as the loss payee of the insurance proceeds payable with respect to such casualty or damage, or (ii) if within the period of thirty (30) days following the receipt of such Net Proceeds the Borrower (A) notifies the Administrative Agent that it intends to reinvest such Net Proceeds within the six (6) months thereafter in the payment of the costs of repairing, restoring, rebuilding or replacing the portion of the property that was the subject of such casualty or damage; and (B) certifies that such repair, restoration, rebuilding or replacement will be completed within a period of six (6) months from the occurrence of the relevant casualty event; and provided further, that if the Net Proceeds from such a casualty event or damage exceed five million Dollars (US$5,000,000), the full amount thereof shall be paid to (x) so long as the Restated Argentine Financing Agreement is in effect and any Obligations (as defined therein) are still outstanding, the Collateral Agent (as defined in the Restated Argentine Financing Agreement) and thereafter, to the Administrative Agent, to be held by such Collateral Agent or Agent, as the case may be, in, so long as the Restated Argentine Financing Agreement is in effect and any Obligations (as defined therein) are outstanding, the Net Proceeds Account (as defined in the Restated Argentine Financing Agreement) and thereafter to such account as directed by the Administrative Agent, and shall be released by such Collateral Agent or Administrative Agent, as the case may be, to or at the direction of the Borrower as and when required for payment of such costs of repair, restoration, rebuilding or replacement; provided, however, that in no event shall the amount payable in respect of this clause (2) exceed the product of the outstanding principal amount as of the date of such Prepayment multiplied by the percentage shown on the Claimed Amount Schedule as of the relevant date on which such Prepayment is made.

(3) Prepayment Under IMPSAT Convertible Notes. Concurrently with the making of any voluntary or mandatory prepayment in respect of the securities issued pursuant to

any of the IMPSAT Convertible Notes (not including any voluntary or mandatory prepayment made in connection with the refinancing of the aggregate principal and interest due under such securities), the Borrower shall make a Prepayment in an amount which bears to the aggregate principal amount of the Term Loans then outstanding the same ratio as the amount of the prepayment of the relevant securities bears to the aggregate principal amount of such securities then outstanding; provided, however, that in no event shall the amount payable in respect of this clause (3) exceed the product of the outstanding principal amount as of the date of such Prepayment multiplied by the percentage shown on the Claimed Amount Schedule as of the relevant date on which such Prepayment is made.

(4) Excess Cash Flow of the Borrower. Within fifteen (15) Business Days after the Borrower shall have submitted to the Administrative Agent its annual financial statements pursuant to Section 8.1(a) in respect of any fiscal year of the Borrower, the Borrower shall make a Prepayment under this Subsection 3.2(a)(4) , Subsection 3.2(a)(4) of the Restated Argentine Financing Agreement and Subsection 3.2(a)(4) of the BBVA Financing Agreement in an aggregate amount equal to fifty percent (50%) of the Borrower’s Excess Cash Flow for such fiscal year, which Prepayment shall be applied among this Subsection 3.2(a)(4) and Subsection 3.2(a)(4) of the Restated Argentine Financing Agreement pro rata based on (x) the then outstanding balance of the Term Loans, (y) the then outstanding balance of the term loans under the Restated Argentine Financing Agreement and (z) the then outstanding balance of the term loans under the BBVA Financing Agreement.

(5) Excess Cash Flow of IMPSAT. Within fifteen (15) days after the Borrower shall have submitted, or shall have caused to be submitted, to the Administrative Agent IMPSAT’s annual financial statements pursuant to Section 8.1(a) in respect of any fiscal year of IMPSAT, the Borrower shall make a Prepayment under this Subsection 3.2(a)(5), Subsection 3.2(a)(5) of the Nortel Brazil Financing Agreement, Subsection 3.2(a)(5) of the Restated Argentine Financing Agreement and Subsection 3.2(a)(5) of the BBVA Financing Agreement in an aggregate amount equal to fifty percent (50%) of IMPSAT’s Excess Cash Flow for such fiscal year, which Prepayment shall be applied among this Subsection 3.2(a)(5), Subsection 3.2(a)(5) of the Nortel Brazil Financing Agreement, Subsection 3.2(a)(5) of the Restated Argentine Financing Agreement and Subsection 3.2(a)(5) of the BBVA Financing Agreement, pro rata based on (w) the then outstanding balance of the Term Loans, (x) the then outstanding balance of the term loans under the Nortel Brazil Financing Agreement, (y) the then outstanding balance of the term loans under the Restated Argentine Financing Agreement and (z) the then outstanding balance of the term loans under the BBVA Financing Agreement; provided, however, that no Prepayment shall be required pursuant to this clause to the extent that IMPSAT does not have sufficient funds (excluding the IMPSAT Exit Cash Balance) to otherwise allow the Borrower to effect such a Prepayment and (a) such Prepayment would require a distribution be made to IMPSAT by any Subsidiary thereof that would be subject to any withholding or other taxes, (provided that the Borrower, IMPSAT and the affected Subsidiary(ies) of IMPSAT have used good faith efforts to effect such a distribution in a manner that lawfully eliminates any such withholding or other taxes) or (b) such Prepayment would require a distribution be made to IMPSAT from any Subsidiary of IMPSAT that is not permitted to be made pursuant to the terms of any agreement relating to Indebtedness of such Subsidiary; and provided further that the

amount of any Prepayments that are not made by reason of clause (a) or (b) above shall be deferred and payable at such time that IMPSAT has sufficient cash to effect such Prepayment.

(6) Borrower Capital Markets Transactions.The Borrower shall, or shall cause its Subsidiaries to, make a Prepayment upon the receipt by the Borrower or any of its Subsidiaries of the Net Proceeds of any Borrower Capital Markets Transaction. With respect to such Net Proceeds, the amount of aggregate Prepayment required by this Subsection 3.2(a)(6), Subsection 3.2(a)(6) of the Restated Argentine Financing Agreement and Subsection 3.2(a)(6) of the BBVA Financing Agreement shall be equal to fifty percent (50%) of such Net Proceeds, which Prepayment shall be applied among this Subsection 3.2(a)(6), Subsection 3.2(a)(6) of the Restated Argentine Financing Agreement and Subsection 3.2(a)(6) of the BBVA Financing Agreement pro rata based on (x) the then outstanding balance of the Term Loans, (y) the then outstanding balance of the term loans under the Restated Argentine Financing Agreement and (z) the then outstanding balance of the term loans under the BBVA Financing Agreement.

(7) IMPSAT Capital Markets Transactions. The Borrower shall, or shall cause its Subsidiaries or IMPSAT (as applicable) to, make a Prepayment upon the receipt by the Borrower or any of its Subsidiaries or IMPSAT of the Net Proceeds of any IMPSAT Capital Markets Transaction. With respect to such Net Proceeds, the amount of aggregate Prepayment required by this Subsection 3.2(a)(7), Subsection 3.2(a)(7) of the Nortel Brazil Financing Agreement, Subsection 3.2(a)(7) of the Restated Argentine Financing Agreement and Subsection 3.2(a)(7) of the BBVA Financing Agreement shall be equal to fifty percent (50%) of such Net Proceeds, which Prepayment shall be applied among this Subsection 3.2(a)(7), Subsection 3.2(a)(7) of the Restated Argentine Financing Agreement, Subsection 3.2(a)(7) of the Nortel Brazil Financing Agreement and Subsection 3.2(a)(7) of the BBVA Financing Agreement pro rata based on (w) the then outstanding balance of the Term Loans, (x) the then outstanding balance of the term loans under the Restated Argentine Financing Agreement, (y) the then outstanding balance of the term loans under the Nortel Brazil Financing Agreement and (z) the then outstanding balance of the term loans under the BBVA Financing Agreement.

All amounts required to be prepaid under this Section 3.2(a) shall be paid to the Administrative Agent promptly (but in any case within ten (10) Business Days except as otherwise provided in Sections 3.2(a)(4) and 3.2(a)(5)) after the receipt by the Borrower and/or its Affiliates of such amount.

(b) Optional Prepayments. Upon not less than seven (7) Business Days prior written notice to the Administrative Agent, the Borrower may make a Prepayment without premium or penalty, on any Business Day, subject to the limitations imposed by Applicable Law, if any, provided that such Prepayment shall only be allowed if the amount thereof is equal to five hundred thousand Dollars (US$500,000) or an integral multiple thereof, except that if the aggregate principal amount of the Term Loans then outstanding is less than five hundred thousand Dollars (US$500,000), the Borrower may prepay such aggregate principal amount. Upon receipt of such notice by the Administrative Agent, the Borrower’s obligation to make such Prepayment shall be irrevocable and binding.

(c) Order of Application. All Prepayments under this Section 3.2 shall be applied in inverse order of scheduled future installment repayments of the Term Loans.

Section 3.3. Interest.

(a) Interest Rate. Until March 25, 2005, no interest shall accrue on the outstanding principal balance of the Term Loans. Commencing on March 25, 2005 interest shall accrue on the outstanding principal balance of the Term Loans at a fixed rate of ten percent (10%) per annum and shall be payable in arrears on each Interest Payment Date, with the initial Interest Payment Date of September 25, 2005, and continuing on each Interest Payment Date thereafter until such Term Loan is paid in full.

(b) Default Interest. Notwithstanding the provisions of Section 3.3(a), (i) upon the occurrence and during the continuance of any Event of Default after March 25, 2005, the Borrower shall pay to the Lenders on demand interest at the Default Interest Rate on the unpaid principal balance of each Term Loan and (ii) with respect to the amount of any interest, fee or any other amount payable by the Borrower hereunder or under the Notes, which has not been paid in full when due (whether at stated maturity, by acceleration, prepayment or otherwise), for the period from and including the due date thereof to and including the date the same is paid in full (both before and after judgment), whether or not any notice of default in the payment thereof has been delivered, the Borrower shall pay to the Lenders interest thereon, to the extent permitted by Applicable Law, in arrears on the date such amount shall be paid in full at the Default Interest Rate. Interest payable under this Section 3.3(b)(ii) shall be compounded on any overdue amount at three (3) month intervals commencing on the date on which the default occurred.

(c) Computation. Interest on all Term Loans shall be computed on the basis of three hundred sixty (360) days and actual days elapsed (including the first day but excluding the last) occurring in the period for which payable.

Section 3.4. INTENTIONALLY OMITTED.

Section 3.5. Nature of Payments.

All payments under this Agreement and under the Notes shall be paid on the dates when due without presentment, demand, protest, or notice of any kind, all of which are hereby expressly waived. Such payments shall be made in Dollars and in immediately available funds, without setoff, recoupment, counterclaim, or any other deduction of any nature.

Section 3.6. Payment Procedures.

(a) Deposit Account. All payments hereunder and under the Notes shall be made to the Administrative Agent for the ratable account of each Lender entitled thereto, in Dollars by wire transfer of immediately available funds to the Administrative Agent’s account indicated below, or such other account as the Administrative Agent may designate to the Borrower in writing (the “Deposit Account”), not later than 1:00 P.M. New York time on the date when due.


	Administrative Agent’s Deposit Account: Citibank N.A. New York Swift Number ▇▇▇▇▇▇▇▇ ABA # ▇▇▇▇▇▇▇▇▇ For Credit to the account of Nortel Networks Limited Account #▇▇▇▇▇▇▇▇

Any payments under this Agreement that are made later than 1:00 p.m. (New York time) shall be deemed to have been made on the next succeeding Business Day.

(b) Business Days. Whenever any payment to be made hereunder or under any Note shall be due on a day which is not a Business Day, the due date thereof shall be extended to the next succeeding Business Day, provided that should such next succeeding Business Day fall in the next calendar month, such due date shall be the immediately preceding Business Day.

Section 3.7. Administrative Agent’s Determination.

Any determination made by the Administrative Agent as to the interest rate, the Default Interest Rate, and the amounts of interest, principal and other amounts due hereunder shall be conclusive in the absence of manifest error.

Section 3.8. Payments Pro Rata.

(a) Pro Rata. The Administrative Agent agrees that promptly after its receipt of each payment from or on behalf of the Borrower in respect of any amount due and payable by the Borrower hereunder, except as otherwise expressly provided herein, it shall distribute such payment to the Lenders pro rata based upon their respective shares, if any, of the Obligations with respect to which such payment was received.

(b) Excess Payments. Each of the Lenders agrees that, if it should receive any payment hereunder (either by voluntary payment, by realization upon security, by the exercise of the right of setoff or banker’s lien, by counterclaim or cross action, or otherwise), which is applicable to the payment of the principal of or interest on the Term Loans or the fees, with the result that such Lender receives a greater proportion of the amount then due to it hereunder than any other Lender receives in respect of the amount due to such other Lender hereunder, then such Lender receiving such excess payment shall purchase for cash without recourse or warranty from the other Lenders an interest in the Obligations of the Borrower to such other Lenders in such amount as shall result in a proportional participation by all the Lenders in such payment; provided, however, that if all or any portion of such excess amount is thereafter recovered from such Lender, such purchase shall be rescinded and the purchase price restored to the extent of such recovery, without interest.

Section 3.9. Governmental Approvals.

The Borrower shall obtain all necessary Governmental Approvals (including, but not limited to, approvals from the Central Bank) in connection with the performance of any of its obligations hereunder and with respect to any payments to be made under this Agreement and

the other Financing Documents, and provide copies thereof to the Administrative Agent promptly after the Borrower’s receipt thereof.

SECTION 4. PAYMENT IN DOLLARS; EVENT OF SOVEREIGN RISK

Section 4.1. Obligation to Pay in Dollars; Judgment Currency.

This is an international transaction in which the specification of Dollars and payment in the place specified pursuant to this Agreement (the “Specified Place of Payment”), is of the essence, and Dollars shall be the currency of account in all events. The Obligations of the Borrower shall not be discharged by an amount paid in another currency or in another place, whether pursuant to a judgment or otherwise, to the extent that the amount so paid on conversion to Dollars and transferred to the Specified Place of Payment under normal banking procedures does not yield the amount of Dollars in the Specified Place of Payment due hereunder. If for the purpose of obtaining judgment in any court it is necessary to convert a sum due hereunder in Dollars into another currency (the “Second Currency”), the rate of exchange which shall be applied shall be that at which in accordance with normal banking procedures the Lenders could purchase Dollars with the Second Currency on the Business Day next preceding that on which judgment is rendered. The obligation of the Borrower in respect of any such sum due to the Lenders hereunder or under the Notes shall, notwithstanding the rate of exchange actually applied in rendering such judgment, be discharged only to the extent that on the Business Day following receipt by the Lenders of any sum adjudged to be due hereunder or under the Notes in the Second Currency, the Lenders may in accordance with normal banking procedures purchase and transfer to the Specified Place of Payment Dollars with the amount of the Second Currency so adjudged to be due; and the Borrower hereby, as a separate obligation and notwithstanding any such judgment, agrees to indemnify the Lenders against, and to pay the Lenders on demand in Dollars, any difference between the sum originally due to the Lenders in Dollars and the amount of Dollars so purchased and transferred (including, without limitation, all costs and expenses of the Lenders incurred in connection therewith, such as transfer taxes, commissions and fees).

Section 4.2. Event of Sovereign Risk.

Without prejudice to Section 4.1, in the event that not less than three (3) Business Days before any payment is due hereunder any Lender notifies the Administrative Agent that an Event of Sovereign Risk has occurred and is continuing, the Administrative Agent shall notify the Borrower and each Lender of the occurrence of such event and the Borrower shall at its own expense and at each Lender’s sole option (which option shall be deemed to be that set forth in Section 4.2(b) below unless notice shall have been received from such Lender as described in Section 4.2(b) or (c) below):

(a) Dollars. Obtain the required amount of Dollars through (1) the sale of any public or private bond or tradable security, (2) the purchase of Dollars in New York, with whatever legal tender, or (3) failing both (1) and (2), any other legal mechanism for the acquisition of Dollars in any exchange market; or

(b) Best Firm Bid Price. If a Lender shall have notified the Administrative Agent and the Borrower prior to a date of payment that its option shall be that set forth in this Section 4.2(b), make the required payment in the city of Buenos Aires, Argentina, by the delivery of, at such Lender’s sole option, (1) Argentine Floating Rate Bonds (“FRBs”), (2) Argentine Par Bonds (“Par Bonds”) or (3) any other securities exchangeable for FRBs or Par Bonds in accordance with Argentine regulations, which, in any of cases (1) through (3) if sold at the best firm bid price quoted, for the relevant amount, on the date of payment in New York by the Reference Dealers would cause such Lender to receive, after taxes, fees, commissions and any other costs, an amount of Dollars equal to the amount required to be paid by the Borrower for the account of such Lender on such payment date (for purposes of this Section 4.2(b), the “best firm bid price” shall be determined on the basis of quotes obtained from the Reference Dealers and, if only one quote is obtained, on the basis of such quote; and “Reference Dealers” shall mean ▇.▇. ▇▇▇▇▇▇ ▇▇▇▇▇ & Co., Banque Nationale de Paris, and ▇▇▇▇▇▇▇ ▇▇▇▇▇ & Co. or, if none of the foregoing is quoting a firm bid price for such payment date, then the “Reference Dealers” shall be those dealers (which may be as few as one dealer) selected by such Lender to be Reference Dealers for the purposes of this Section 4.2(b)); or

(c) Deferral. If a Lender shall have notified the Administrative Agent and the Borrower prior to a date of payment that its option shall be that set forth in this Section 4.2(c), defer payment of the amount due as specified in such notice until the earlier of (1) the date which is one Business Day following the date on which such Lender shall, in its sole discretion, notify the Administrative Agent and the Borrower that such Event of Sovereign Risk is no longer in effect, or (2) the date (which date shall be not more than ninety (90) calendar days following the date on which the payment was originally due) on which such Lender shall notify the Administrative Agent and the Borrower that payment is to be made in accordance with the procedure outlined in either Section 4.2(a) or (b) above, as such Lender shall elect. If a payment obligation of the Borrower is so deferred pursuant to this Section 4.2(c), then the period between the original payment date and the deferred date for payment determined in accordance with the first sentence of this Section 4.2(c) (the “Deferred Payment Date”) shall be the “Sovereign Event Deferral Period”. If such Lender shall subsequently provide notice that the Borrower is to make payment as specified in (x) Section 4.2(c)(1) above or (y) Section 4.2(c)(2) above pursuant to an election to apply the mechanism set forth in Section 4.2(a) above (which subsequent notice shall specify the Dollar amount due on the Deferred Payment Date concerned), then the Borrower shall make payment in Dollars of all outstanding amounts due hereunder (including, without limitation, interest accrued during the Sovereign Event Deferral Period) on such Deferred Payment Date in accordance with the terms of this Agreement. Alternatively, if such Lender shall subsequently provide notice that the Borrower is to make payments pursuant to the mechanism set forth in Section 4.2(b) above (which subsequent notice shall specify the Dollar amount due on the Deferred Payment Date concerned, as well as the securities to be used for payment and the account in Argentina to which such securities are to be delivered), then the Borrower shall make payment of all outstanding amounts due hereunder (including, without limitation, interest accrued during the Sovereign Event Deferral Period) on such Deferred Payment Date in accordance with such Lender’s notice.

(d) Accrual of Interest Unaffected. Any undertaking of operations to obtain Dollars according to this Section 4.2 shall not affect the accrual of interest (including default interest) in

accordance herewith. Nothing in this Section 4.2 shall impair any of the rights of the Agent or the Lenders under this Agreement or be construed to entitle the Borrower to refuse to make payments hereunder in Dollars for any reason whatsoever, including, without limitation, any of the following:

(1) the purchase of Dollars in Argentina by any means becomes more onerous or burdensome for the Borrower than as of the date hereof; and

(2) the exchange rate in force in Argentina for the conversion of Pesos to Dollars changes significantly from that in effect as of the date hereof.

Section 4.3. Waiver of “Pesification”.

The Borrower hereby irrevocably and unconditionally waives any and all rights it may have at any time to convert the currency of account for the Obligations from Dollars into Pesos or any other currency or type of security pursuant to any Applicable Law now or hereafter in effect in Argentina, including without limitation, Argentine Decree No. 214/02, as amended.

SECTION 5. FUNDING AND YIELD PROTECTION

Section 5.1. Taxes.

(a) Payment Net of Taxes. Any and all payments by the Borrower in respect of amounts due under this Agreement, the Notes and any other Financing Document shall be made free and clear of, and without withholding or deduction for or on account of, any present or future taxes (including, without limitation, income taxes, value added taxes, sales taxes, use taxes, stamp or documenting taxes, excise taxes, property taxes and asset taxes), duties, levies, fees, imposts, deductions, charges or withholdings, and all liabilities with respect thereto, of whatever nature now or hereafter imposed, assessed or levied (including interest, penalties or additions thereto) by any Argentine Governmental Authority or by any other Governmental Authority from or through which any payment is made hereunder or under the other Financing Documents (“Taxes”), except income or franchise taxes imposed on any Lender by the laws of the jurisdiction, whether federal, state or local, in which it is resident or organized (“Excluded Taxes”). If any Taxes, other than any Excluded Taxes, are required by Applicable Law to be withheld or deducted from or in respect of any sum payable under this Agreement, the Notes or any other Financing Document:

(1) the Borrower shall pay such additional amount as may be necessary to ensure that after reduction for all required withholdings or deductions for Taxes, other than Excluded Taxes (including withholdings or deductions applicable to additional sums payable under this Section 5.1), the net amount actually received by the Lenders free and clear of such withholding or deduction is equal to the amount the Lenders would have received had no such withholdings or deductions been made;

(2) the Borrower shall make such withholdings or deductions; and

(3) the Borrower shall pay the full amount withheld or deducted to the relevant Governmental Authorities in accordance with the Applicable Laws and prior to the date on which penalties attach thereto.

(b) Indemnity. The Borrower shall indemnify and hold the Agent and the Lenders harmless from and against, and shall reimburse the Lenders on demand for, the full amount of Taxes (including, without limitation, any Taxes imposed on amounts payable under this Section 5.1) paid by the Lenders other than Excluded Taxes, and for any loss, liability, claim or expense (including penalties, interest, and legal fees) arising therefrom or with respect thereto, whether or not such Taxes were correctly or legally asserted, and which the Agent or the Lenders may incur at any time arising out of, or in connection with, any failure of the Borrower to make any payment of such Taxes when due.

(c) Other Taxes. The Borrower shall pay all Taxes (including notary public and filing fees), other than Excluded Taxes, associated with the execution, delivery, filing, recording, or registration of, or foreclosure with respect to, this Agreement, the Notes and the other Financing Documents, and shall indemnify and hold the Agent and the Lenders harmless from and against any and all liabilities with respect to, or resulting from, any failure or delay in paying such Taxes.

(d) Survival. Without prejudice to the survival of any other agreement of the Borrower hereunder, the Obligations of the Borrower under this Section 5.1 shall survive the payment in full of all principal and interest hereunder and under the Notes.

(e) Tax Receipts. Within thirty (30) days after the date of any payment of Taxes required to be made under this Section 5.1, the Borrower shall furnish to the Administrative Agent a copy of any official tax receipts evidencing such payment.

Section 5.2. Illegality.

(a) Prepayment. If the introduction of any Applicable Law, or any change in any Applicable Law, or any change in the interpretation or administration of any Applicable Law, makes or has made it unlawful for a Lender or its applicable Lending Office to maintain any Term Loan, the Borrower shall, upon receipt of notice of such determination and demand from such Lender (with a copy to the Administrative Agent), prepay in full the Term Loan of such Lender then outstanding, together with any accrued and unpaid interest thereon and any fees required to be paid under Section 3.4, on the next Interest Payment Date for such Term Loan following the date the notice is given; provided, however, that if such Lender notifies the Borrower that earlier Prepayment is necessary in order to enable such Lender to comply with such Applicable Law or change and specifies an earlier date for the Prepayment, the Borrower shall make the Prepayment on the date so specified.

(b) Lender’s Duty to Mitigate. Before giving notice to the Administrative Agent under this Section 5.2, the affected Lender shall endeavor to designate a different Lending Office with respect to its Term Loan or endeavor in good faith to provide another structure for its Term Loan if such designation or alternative structure will avoid the need for giving such notice or

making such demand and will not, in the Lender’s sole determination, be illegal or cause such Lender to suffer any economic, legal, regulatory or other disadvantage.

Section 5.3. Increased Costs and Yield Protection.

(a) Notice; Additional Payments. If due to either (1) the introduction of, any change in, or any change in the interpretation or administration by any competent authority of, any Applicable Law, or (2) the compliance by a Lender with any guideline or request from any central bank or any other Governmental Authority (whether or not having the force of law), in each case, made subsequent to the date of this Agreement, there shall be any increase in the cost to such Lender of agreeing to make or making, funding or maintaining its Term Loan, then such Lender shall notify the Administrative Agent and the Borrower accordingly, and upon receipt from such Lender (through the Administrative Agent) of a demand for payment of additional amounts) the Borrower shall pay to the Administrative Agent for the account of such Lender, such additional amounts as are sufficient to compensate such Lender for such increased costs; provided that any such additional amounts shall not duplicate any amounts payable by the Borrower under Section 5.2.

(b) Capital Adequacy Regulations. If (1) the effectiveness of any Capital Adequacy Regulation, (2) any change in any Capital Adequacy Regulation, (3) any change in the interpretation or administration of any Capital Adequacy Regulation by any competent authority, including with respect to compliance by a Lender (or its Lending Office) or any corporation controlling the Lender with any Capital Adequacy Regulation, in each case, made subsequent to the date of this Agreement, affects the amount of capital reserves or other funds required or expected to be maintained by such Lender (or its Lending Office) or any corporation controlling such Lender and, after taking into consideration such Lender’s or such corporation’s policies with respect to capital adequacy and otherwise anticipated return on capital, such Lender determines that the amount of such capital reserves or other funds is increased as a consequence of its Term Loans and other obligations under this Agreement, then the Borrower, upon receipt from such Lender (through the Administrative Agent) of a demand for payment of additional amounts, shall pay to such Lender additional amounts sufficient to compensate such Lender, the Lending Office or the corporation for the increased cost to such Lender, Lending Office or other corporation or the reduction in the rate of return to such Lender, Lending Office or other corporation on its capital caused by its compliance with such Capital Adequacy Regulation, provided, however, that any such additional amounts shall not duplicate any amounts payable by the Borrower under Section 5.3(a).

(c) Lender’s Duty to Mitigate. Before giving notice to the Administrative Agent under this Section 5.3, the affected Lender shall endeavor to designate a different Lending Office with respect to its Term Loan if such designation will avoid the need for giving such notice or making such demand and will not, in the Lender’s sole determination, be illegal or cause such Lender to suffer any economic, legal, regulatory or other disadvantage.

SECTION 6. DELIVERIES; CONDITIONS PRECEDENT

On the Closing Date, the following conditions shall have been satisfied:

Section 6.1. Closing Documents.

The Borrower shall have delivered, or caused to be delivered to the Administrative Agent the following documents, each in form and substance satisfactory to the Administrative Agent and the Lenders and their respective counsel:

(a) Note. The original Note or Notes duly executed by the Borrower.

(b) INTENTIONALLY OMITTED.

(c) Other Financing Documents. In addition to the Note pursuant to clause (a) above, each of the Financing Documents duly executed by the respective parties thereto.

(d) Charter Documents. (1) true copies of the Borrower’s Charter Documents in effect on the Closing Date certified by an Authorized Officer of the Borrower and; (2) true copies of all corporate action taken by the Borrower relative to the Financing Documents which have been properly adopted and have not been modified or amended, certified by an Authorized Officer of the Borrower;

(e) Officer’s Certificates. Certificates, dated the Closing Date, signed by an Authorized Officer of the Borrower and certifying: (1) the name, true signatures and incumbency of the Authorized Officers of the Borrower authorized to execute and deliver this Agreement and the other Financing Documents to which it is a party; (2) no Default or Event of Default exists under this Agreement; (3) the accuracy as of the Closing Date of the matters set forth in Section 6.6; and (4) that the Borrower is Solvent following the consummation of the transactions contemplated herein and pursuant to the Plan on the Closing Date.

(f) Licenses. Documents which evidence, to the satisfaction of the Administrative Agent, the Borrower’s ownership of the Licenses and that the Licenses are in full force and effect.

(g) Opinions of Counsel. A favorable written legal opinion addressed to the Administrative Agent and each of the Lenders and dated the Closing Date as to such matters as shall be required by the Administrative Agent, any Lender or their respective counsel, from each of:

(1) ▇▇▇▇▇▇ & ▇▇▇▇▇▇, in its capacity as special U.S. Counsel to the Borrower, and

(2) ▇▇▇▇▇▇▇▇▇ y ▇▇▇▇, Argentine Counsel to the Borrower.

(h) Governmental Approvals. Evidence that the following Governmental Approvals have been obtained and are in full force and effect, and all registrations, applications, tariffs,

reports and other documents in connection therewith required to be filed and/or registered with any Person have been filed and registered:

(1) All Governmental Approvals, if any, then necessary in connection with the execution, delivery or performance by the Borrower of this Agreement and any other Financing Documents to which the Borrower is a party;

(2) All Governmental Approvals, if any, then necessary in connection with the exercise by the Administrative Agent or any Lender of its rights or remedies under this Agreement or any other Financing Documents; and

(3) All material Governmental Approvals, if any, then necessary in connection with the continuing operation of the Telecommunications Business by the Borrower and its Subsidiaries and the implementation of the Project.

(i) Process Agent. A letter from CT Corporation System, currently located at ▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇, in a form satisfactory to the Administrative Agent in its sole discretion, indicating its consent to its appointment as agent for service of process by the Borrower; and evidence that the fees of such agent have been paid in full for the period commencing on the date hereof until six (6) months after the Maturity Date.

(j) Insurance. Certificates of all insurance required by Section 8.1(d), which certificates (1) state the names of the insurance companies, the amounts of the insurance, the dates of the expiration thereof and the properties and risks covered thereby, (2) have been executed by an Authorized Officer of the respective insurer, and (3) certify that all premiums and other payments have been timely paid and that such insurance is otherwise not subject to cancellation by the insurer during its term, except for nonpayment of premiums, in which case at least fifteen (15) days prior written notice of termination must be given to the Administrative Agent.

(k) INTENTIONALLY OMITTED

(l) Business Plans. Copies of the Business Plans, together with a certificate of the chief or principal accounting or financial officer of IMPSAT, dated the Closing Date, certifying as to the reasonableness of the assumptions and expectations contained therein and that there are presently no facts known to such Person that would make either Business Plan misleading in any material respect.

(m) Management Employment Agreements. Copies of the employment agreements of IMPSAT’s senior management contemplated by the Plan.

Section 6.2. Plan and Plan Confirmation.

(a) Plan. All transactions contemplated by the Plan, and all of the transactions contemplated by the Restated Argentine Financing Agreement and the Nortel Brazil Financing Agreement, shall have closed, and copies of all documents related thereto shall have been delivered to, and approved by, the Administrative Agent.

(b) Plan Confirmation. The Plan shall have been confirmed by the United States Bankruptcy Court for the Southern District of New York and shall be effective.

Section 6.3. INTENTIONALLY OMITTED.

Section 6.4. Restated Argentine Financing Agreement.

The Restated Argentine Financing Agreement shall have been duly executed by the parties thereto, and the Administrative Agent shall have received a copy thereof.

Section 6.5. Material Agreements.

Subject to confidentiality restrictions, the Administrative Agent shall have received complete and correct copies, certified by an Authorized Officer of the Borrower, of all of the Borrower’s Material Agreements.

Section 6.6. Representations and Warranties.

All representations and warranties made by the Borrower or any Subsidiary thereof in the Financing Documents shall be true and correct in all material respects.

Section 6.7. Covenants.

The Borrower shall be in compliance with all covenants contained in Section 8.

Section 6.8. Litigation.

No litigation, investigation or proceeding of or before any arbitrator or Governmental Authority shall be pending, or to the knowledge of the Borrower, threatened by or against the Borrower or any of its Subsidiaries or against any of its or their respective properties or revenues which challenges the validity or legality of this Agreement or any of the transactions contemplated hereby or thereby.

Section 6.9. No Defaults.

No Default or Event of Default shall exist hereunder and no default or event of default shall exist under any of the Brazil Agreements (regardless of whether or not there has been a notice of default or acceleration thereunder).

Section 6.10. Material Adverse Change.

Since the confirmation date of the Plan, no Material Adverse Change shall have occurred and be continuing.

Section 6.11. Payment of Fees.

The Borrower shall have paid all fees and expenses, including without limitation, the reasonable fees and expenses of counsel to the Administrative Agent and Lenders and local counsel to the Administrative Agent and Lenders.

Section 6.12. Capitalization of ISCH Indebtedness.

Notwithstanding any prior agreement, including the ISCH Letter Agreement, all Indebtedness owed by the Borrower or IMPSAT to ISCH under the Lucent Argentina 2000 Financing Agreement shall have been capitalized by IMPSAT in the Borrower with no further obligation or liability on the part of either the Borrower or IMPSAT, and the Administrative Agent shall have received evidence, in form and substance satisfactory to it, that such Indebtedness has been capitalized.

Section 6.13. English Language.

All Charter Documents and other documents and resolutions required to be delivered pursuant to this Agreement, the other Project Agreements, and the Licenses shall, if not in English, and if the Administrative Agent so requests, be accompanied by an English translation (which, if the Administrative Agent so requests, shall be a certified translation prepared by an Argentine certified translator) which the Administrative Agent shall have the right to rely upon for all purposes hereof and the other Project Agreements. All costs of translation shall be payable by the Borrower.

SECTION 7. REPRESENTATIONS AND WARRANTIES.

The Borrower hereby represents and warrants to the Administrative Agent and each Lender that the statements contained in this Section 7 are true, correct and complete as of the date hereof.

Section 7.1. Corporate Status.

(a) Each of the Borrower and its Subsidiaries and IMPSAT (i) is a sociedad anónima or corporation, as the case may be, duly organized, validly existing and in good standing under the laws of the jurisdiction of its incorporation, and (ii) has the power and authority to own its property and assets, to carry on its business in each jurisdiction in which it operates, and to incur Indebtedness and to create or suffer to exist Liens on its properties created under the Security Documents. IMPSAT is the holder, directly or indirectly, of at least ninety-five percent (95%) of the Capital Stock of the Borrower. Set forth on Schedule 7.1(a) hereto is a complete list of the Subsidiaries of IMPSAT and the Borrower, the jurisdiction of organization of each such Subsidiary and the amount and percentage of Capital Stock of each such Subsidiary owned by IMPSAT and the Borrower.

(b) Except as set forth on Schedule 7.1(b) hereto, neither the Borrower, its Subsidiaries or IMPSAT conducts business under any assumed names or trade names, or has

conducted business under any other names, or any assumed names or trade names at any time prior to the date hereof.

Section 7.2. Corporate Power.

(a) Authority. Each of the Borrower and its Subsidiaries has full power and authority to enter into the Financing Documents to which it is a party or, when executed and delivered, it will become a party, all of which have been duly authorized by all proper and necessary corporate action, and has duly executed and delivered each such Financing Document which has been entered into as of the date hereof.

(b) Validity and Enforceability. Assuming due execution and delivery thereof by the other parties thereto, each such Financing Document constitutes, or when executed and delivered will constitute, a legal, valid and binding obligation of the Borrower and its Subsidiaries, as the case may be, enforceable against them in accordance with its terms, except, in each case, to the extent such enforceability may be restricted by bankruptcy, insolvency or similar Applicable Laws affecting the enforcement of creditors’ rights generally or by general principles of equity.

Section 7.3. Governmental Approvals.

(a) Financing Documents. All Governmental Approvals that are required by the Borrower and its Subsidiaries in connection with the execution, delivery or performance by, or enforcement against, the Borrower and its Subsidiaries of this Agreement and all other Financing Documents to which the Borrower or its Subsidiaries is a party have been obtained, are in full force and effect, and the Borrower and its Subsidiaries are in compliance in all material respects with such Governmental Approvals, other than the Governmental Approvals to be given by the Central Bank to transfer funds outside of Argentina in connection with the payments to be made hereunder and under the Note.

(b) Operations. All Governmental Approvals that are required by the Borrower, its Subsidiaries or IMPSAT in connection with the business, operations and activities of the Borrower and its Subsidiaries as now conducted or as contemplated by the Borrower Business Plan have been obtained.

(c) No Proceedings.There is no proceeding pending or, to the knowledge of the Borrower or any of its Subsidiaries, threatened against the Borrower, its Subsidiaries or IMPSAT that seeks to rescind, terminate, suspend, modify or otherwise affect any Governmental Approvals, in each case that would have a Material Adverse Effect.

Section 7.4. No Violation.

Neither the execution, delivery or performance by the Borrower, IMPSAT or any of their respective Subsidiaries of any Project Agreement to which it is a party, nor the use by the Borrower of the advances under the Outstanding Accounts Payable as restructured by this Agreement:

(a) will violate or conflict with any term or condition of any License or other Governmental Approval obtained by the Borrower or any of its Subsidiaries;

(b) will contravene any material provision of any Applicable Law binding on the Borrower, IMPSAT or any of their respective Subsidiaries or any of their assets;

(c) will conflict with, or be inconsistent with, or result in any breach of, or constitute a default under, or result in the creation or imposition of (or the obligation to create or impose) any Lien (other than Permitted Liens) upon any of the properties or assets of the Borrower, IMPSAT or any of their respective Subsidiaries pursuant to the terms of any indenture, mortgage, credit agreement, loan agreement or any other agreement, contract or instrument to which the Borrower, IMPSAT or any such Subsidiary is a party or by which each such Person or any of its respective properties or assets are bound or to which they may be subject; or

(d) will violate any provision of the Charter Documents of the Borrower, IMPSAT or any of their respective Subsidiaries; except to the extent that any of the violations contained in clauses (c) and (d) above could not reasonably be expected to have a Material Adverse Effect.

Section 7.5. Proceedings.

(a) No Proceedings. Except as set forth in Schedule 7.5, there is no litigation, investigation or proceeding pending or, to the knowledge of the Borrower or IMPSAT after reasonable inquiry, threatened before any arbitrator or Governmental Authority against the Borrower, IMPSAT or any of their respective Subsidiaries, nor, to the knowledge of the Borrower after reasonable inquiry, any circumstances or conditions that might give rise to any such proceedings, which could reasonably be expected to have a Material Adverse Effect.

(b) No Orders. No injunction, writ, temporary restraining order or any order of any nature has been issued by any court or Governmental Authority (1) purporting to enjoin or restrain the execution, delivery or performance of this Agreement or any other Financing Documents, or (2) which could reasonably be expected to have a Material Adverse Effect.

Section 7.6. Taxes.

The Borrower, IMPSAT and their respective Subsidiaries have (a) timely filed all required tax returns, reports and declarations; (b) paid all applicable taxes and governmental assessments and charges shown thereon or determined to be due and payable except for such taxes, if any, as are being contested in good faith by appropriate proceedings diligently conducted and as to which (i) adequate cash reserves have been established in accordance with U.S. or Argentine GAAP, as applicable, on the books of the Borrower, IMPSAT and such Subsidiaries, as the case may be, or (ii) the aggregate amount of such unpaid taxes, assessments and charges is less than one hundred thousand Dollars (US$100,000) (and as to which it or its property is not yet subject to foreclosure, seizure, arrest, sale, collection, levy or loss on account thereof); and (c) set aside on its books provisions reasonably adequate for payment of all taxes for all elapsed periods.

Section 7.7. Financial Statements.

(a) Balance Sheets, etc. The consolidated balance sheet of the Borrower and its Subsidiaries and the consolidated balance sheet of IMPSAT and its Subsidiaries as of September 30, 2002, and the related consolidated statements of income or operations, retained earnings and changes in financial position (or of cash flow, as the case may be) of each of the Borrower and IMPSAT for the period then ended, were correct as of their respective dates and fairly presented the financial condition of the Borrower or IMPSAT and their respective Subsidiaries as of such dates, as the case may be; and results of operations for the period covered thereby. The financial statements to be delivered pursuant to Section 8.1 hereof shall be correct and shall fairly present in all such cases the financial condition of the Borrower or IMPSAT, as the case may be, as of the dates thereof and the results of its operations for the periods ended on said dates, and all are or shall be prepared in accordance with U.S. GAAP.

(b) No Liabilities. The Borrower neither had, or will have on the dates of the financial statements referred to in Section 7.7(a) any material contingent liabilities, liabilities for taxes, or material losses from any commitments, except as specifically referred to, or reflected, or provided for, in said financial statements as at said dates.

Section 7.8. The Project.

(a) Business Plans. The Business Plans accurately state in all material respects all costs and expenses incurred and to be incurred in connection with the business of the Borrower and IMPSAT as applicable. All projections and budgets furnished or to be furnished to the Lenders by or on behalf of the Borrower and IMPSAT and the summaries of significant assumptions related thereto, including (without limitation) all information in the Business Plans: (1) have been and will be prepared with due care; (2) fairly present, and will fairly present, in all material respects, the expectations of the Borrower and IMPSAT as to the matters covered thereby, and (3) are based on, and will be based on, reasonable assumptions as to all factual and legal matters relative to the estimates therein.

(b) Material Information. There are no statements or conclusions in any of the projections or budgets furnished to the Administrative Agent which are based upon or include information known to the Borrower or IMPSAT to be misleading or which fail to take into account material information regarding the matters reported therein.

Section 7.9. Environmental Matters.

Each of the Borrower, its Subsidiaries and IMPSAT has duly complied with, and its business, operations, assets, equipment, property, leaseholds, and other facilities are in compliance with, all applicable Environmental Laws. None of the Borrower, its Subsidiaries or IMPSAT has, nor to the knowledge of the Borrower or IMPSAT after reasonable inquiry, has any other Person, released, discharged, generated, manufactured, produced, stored, or disposed of in, on, under, or about any sites of the Borrower, or transported thereto or therefrom, any hazardous material or Hazardous Substance that could reasonably be expected to subject the Lenders to any liability or the Borrower, its Subsidiaries or IMPSAT to any liability that could

have a Material Adverse Effect. There is no proceeding pending against the Borrower, its Subsidiaries or IMPSAT, and to the best knowledge of the Borrower or IMPSAT after reasonable inquiry, no investigation or inquiry by any Governmental Authority is threatened or contemplated, with respect to the presence or release of hazardous materials or Hazardous Substances in, on, from, or to the sites of the Borrower.

Section 7.10. Transactions with Affiliates.

Except for the Plan or as disclosed in Schedule 7.10, none of the Borrower or any of its Subsidiaries are parties to any contract, agreement or arrangement (whether or not in the ordinary course of business) with the Borrower, IMPSAT, another Subsidiary of the Borrower or IMPSAT or any of their respective Affiliates that is not on an arms-length basis.

Section 7.11. Indebtedness.

As of the date hereof, none of the Borrower or its Subsidiaries is a party to or bound by any note or agreement with respect to Indebtedness other than the Indebtedness arising under this Agreement and the Indebtedness set forth in Schedule 7.11, which is a complete and accurate list of all Indebtedness of the Borrower and its Subsidiaries, showing as of such date the outstanding principal amount thereof, and with respect to which, none of the Borrower and its Subsidiaries have any ability to borrow or reborrow any additional amounts thereunder.

Section 7.12. Properties.

(a) Title. The Borrower or a Subsidiary of the Borrower has good record and marketable title in fee simple (or the Argentine equivalent thereof) or valid leasehold interests in or rights of use with respect to, all real property used in the ordinary conduct of the Telecommunications Business, except for such defects in title as could not, individually or in the aggregate, reasonably be expected to interfere with the Borrower’s ability to conduct such business as currently or expected or projected to be conducted or to utilize such properties for their intended purposes. The assets of the Borrower, its Subsidiaries and IMPSAT reflected in the most recent balance sheet referred to in Section 7.7 are not subject to any Liens other than Permitted Liens (including those described on Schedule 7.12(a)), and each has good and legal title thereto. The Borrower and the Subsidiaries have not created and are not contractually obligated to create any Lien, other than Permitted Liens or Liens to be created or permitted to be created under the Financing Documents to which they are a party, on or with respect to any of their assets, rights or revenues.

(b) Condition. All assets material to the Telecommunications Business are in good repair, working order and condition (ordinary wear and tear excepted).

(c) Bank Accounts. Each of the Borrower and its Subsidiaries has full right and title to each of its bank or other financial accounts (including any disbursement, deposit, operating, payroll, securities and commodity accounts, and each such bank or other financial account is not subject to any Lien other than (1) banker’s liens, rights of setoff or similar rights as to such

deposit accounts or other funds maintained with such creditor depository institution or (2) Permitted Liens.

Section 7.13. Intellectual Property.

The Borrower or IMPSAT owns all of the patents, trademarks, permits, service marks, trade names, copyrights, franchises and formulas, or rights with respect to the foregoing, used in the marketing of any of the Borrower’s and its Subsidiaries’ services (a list of which is attached as Schedule 7.13, as updated from time to time by notice to the Administrative Agent) and the Borrower owns or has obtained assignments of all such and other rights of whatever nature necessary for the present conduct of the Telecommunications Business or as presently contemplated to be conducted, without any known conflict with the rights of others other than as set forth in Schedule 7.13 and except as could not reasonably be expected to have a Material Adverse Effect.

Section 7.14. Books and Records.

Each of IMPSAT, the Borrower and its Subsidiaries maintains its books and records (including appropriate copies, backups and archives of such books and records) in accordance with standard industry practice, Applicable Law and U.S. GAAP or Argentine GAAP, as applicable.

Section 7.15. The Licenses.

Schedule 7.15 contains a true and complete list of all Licenses owned by or granted to the Borrower or its Subsidiaries. Each License is legally valid, in full force and effect, duly registered, not subject to any administrative review or appeal, or subject to any proceeding the outcome of which could result in the revocation, in whole or in part, for any reason not within the control of the Borrower or IMPSAT. The Borrower has paid when due all amounts required to be paid and otherwise has complied with all conditions the compliance with which is required in order to preserve its rights under the Licenses. No Licenses other than those listed in Schedule 7.15 are required in order for the Borrower and its Subsidiaries to install, exploit and operate the Network and to engage in the Telecommunications Business as it is currently conducted by them, and as contemplated by the Borrower Business Plan.

Section 7.16. No Material Adverse Change.

There has been no Material Adverse Change since the confirmation date of the Plan.

Section 7.17. Insurance.

The insurance policies and coverage required by Section 8.1(d) are in full force and effect, all premiums and other payments required thereunder have been timely paid and such policies and coverage are otherwise not subject to cancellation by the insurer during the respective terms thereof, except for nonpayment of premiums, in which case at least fifteen (15) days prior written notice of termination must be given to the Administrative Agent.

Section 7.18. INTENTIONALLY OMITTED.

Section 7.19. Investment Company; Public Utility Holding Company.

None of the Borrower, IMPSAT or any of their respective Subsidiaries is an “investment company” within the meaning of the Investment Company Act of 1940, as amended, or, directly or indirectly, “controlled” by or acting on behalf of any Person that is an “investment company”, within the meaning of said Act, or a “holding company” or a “subsidiary company” of a “holding company” or an “affiliate” of a “holding company” or of a “subsidiary” of a “holding company” within the meaning of the Public Utility Holding Company Act of 1935, as amended.

Section 7.20. Immunity.

The execution, delivery, and performance of the Financing Documents constitute private and commercial acts rather than governmental or public acts. Under Applicable Law, neither the Borrower nor any of its Subsidiaries nor any of their respective revenues or properties has any right of immunity from suit, court jurisdiction, attachment prior to judgment, attachment in aid of execution of a judgment, execution of a judgment or from set-off, Liens, counterclaim or any other legal process or remedy with respect to its obligations under the Financing Documents or the other Project Agreements.

Section 7.21. Margin Stock; Regulation U.

None of the Borrower or any of its Subsidiaries is engaged principally, or as one of its important activities, in the business of extending credit for the purpose of purchasing or carrying margin stock. The conversion of the Outstanding Accounts Payable to the Term Loans has not and will not violate Regulation U or X of the Board of Governors of the Federal Reserve System.

Section 7.22. Solvency.

After giving effect to (a) conversion of the Outstanding Accounts Payable to the Term Loans on the Closing Date and the transactions contemplated by this Agreement and the Plan, and (b) the payment and accrual of all transaction costs in connection with the restructuring, each of the Borrower and IMPSAT is Solvent.

Section 7.23. No Event of Default; Compliance with Material Agreements.

After giving effect to the transactions contemplated by this Agreement and the Plan, no event has occurred and is continuing and no condition exists which constitutes a Default or an Event of Default. After giving effect to the transactions contemplated by this Agreement and the Plan, neither the Borrower nor IMPSAT is in violation of any term of any Material Agreement to which it is respectively a party or by which it or its respective properties are bound, except for such violations that in the aggregate would not have a Material Adverse Effect.

Section 7.24. Fees or Compensation.

No fee or other compensation has been paid or will be payable in connection with the transactions contemplated by this Agreement except as set forth herein.

Section 7.25. Termination of Lucent Agreements.

All financing and supply agreements and commitments thereunder between IMPSAT and any of its Subsidiaries or Affiliates and Lucent Argentina, S.A. and any of its Affiliates have been irrevocably terminated and no longer have any force or effect.

Section 7.26. True and Complete Disclosure.

All information heretofore or hereafter furnished by or on behalf of the Borrower or IMPSAT or any of their respective Subsidiaries to the Agent or the Lenders, and all representations and warranties made herein, are true and correct in all material respects, and do not contain any material misstatement of fact or omit to state a material fact necessary to make the statements contained herein and therein not misleading at such time.

SECTION 8. COVENANTS.

Section 8.1. Affirmative Covenants.

Until payment in full of the Obligations and so long as this Agreement remains in effect, the Borrower shall, and shall cause its Subsidiaries to, comply with each of the following covenants and agreements:

(a) Annual and Quarterly Reporting Requirements. The Borrower shall deliver, or cause to be delivered, to the Administrative Agent:

(1) as to the Borrower:

(i) as soon as practicable, but in no event later than ninety (90) days after the end of each fiscal year of the Borrower, a copy of the consolidated annual financial statements of the Borrower and its Subsidiaries (including its consolidated balance sheet as at the close of such calendar year, consolidated statements of income, retained earnings and changes in financial position or of cash flow, as the case may be, for such fiscal year with related notes specifying significant accounting practices and their impact on such financial statements and with related schedules), and accompanied by an opinion thereon of the Independent Auditor, which opinion shall state, subject to no qualifications, that said financial statements fairly present the financial condition and results of operations of the Borrower and its Subsidiaries, as at the end of, and for, such fiscal year and that said financial statements have been prepared in accordance with Argentine GAAP or U.S. GAAP. Such annual financial statements: (A) shall be in the English language; (B) in the case that such financial statements have been prepared in accordance with Argentine GAAP, shall be accompanied by a reconciliation to U.S. GAAP of the Borrower’s net income and shareholders’ equity and convenience translations to Dollars; and (C) shall be accompanied by a statement, for each of the calendar quarters of the fiscal year, of

each new entry of deferred Revenues and the current sum of all deferred Revenues for the past four consecutive calendar quarters. From time to time, at the request of the Administrative Agent, the Borrower shall deliver to the Administrative Agent such additional financial information as the Administrative Agent may reasonably request; and

(ii) as soon as practicable, but in any event no later than forty-five (45) days after the end of each of the first three (3) quarters of each fiscal year of the Borrower, the unaudited consolidated financial statements of the Borrower and its Subsidiaries (including its consolidated balance sheet as at the close of such quarter, consolidated statements of income, retained earnings and changes in financial position or of cash flow, as the case may be, for such quarter and with related schedules) for such period and for the period from the beginning of the respective fiscal year to the end of such quarterly period and the related balance sheets at the end of such period, setting forth in each case in comparative form the corresponding figures for the corresponding period in the preceding fiscal year accompanied by a certificate of the Chief Financial Officer of the Borrower, which certificate shall state that such financial statements fairly present the financial condition and results of operations, as the case may be, of the Borrower in accordance with Argentine GAAP or U.S. GAAP, as at the end of, and for, such period (subject to normal year end audit adjustments), and, in the case that such financial statements have been prepared in accordance with Argentine GAAP, by a reconciliation to U.S. GAAP of the Borrower’s net income and shareholders’ equity and convenience translations to Dollars. Such quarterly financial statements shall be accompanied by a statement, for each of the past four consecutive calendar quarters, of each new entry of deferred Revenues and the current sum of all deferred Revenues for the past four consecutive calendar quarters.

(2) as to IMPSAT:

(i) as soon as practicable, but in any event no later than ninety (90) days after the end of each fiscal year of IMPSAT, a copy of the annual consolidated financial statements of IMPSAT and its Subsidiaries (including its consolidated balance sheet as at the close of such calendar year, consolidated statements of income, retained earnings and changes in financial position or of cash flow, as the case may be, for such fiscal year with related notes specifying significant accounting practices and their impact on such financial statements and with related schedules), and accompanied by an opinion thereon of the Independent Auditor, which opinion shall state, subject to no qualifications, that said financial statements fairly present the financial condition and results of operations of IMPSAT and its Subsidiaries, as at the end of, and for, such fiscal year and that said financial statements have been prepared in accordance with U.S. GAAP. Such annual financial statements shall be in the English language. From time to time, at the request of the Administrative Agent, IMPSAT shall deliver to the Administrative Agent such additional financial information as the Administrative Agent may reasonably request; and

(ii) as soon as practicable, but in any event no later than forty-five (45) days after the end of each of the first three (3) quarters of each fiscal year of IMPSAT, the consolidated unaudited financial statements of IMPSAT and its Subsidiaries (including its consolidated balance sheet as at the close of such quarter, consolidated statements of income, retained earnings and changes in financial position or of cash flow, as the case may be, for such

quarter and with related schedules) for such period and for the period from the beginning of the respective fiscal year to the end of such quarterly period and the related balance sheets at the end of such period, setting forth in each case in comparative form the corresponding figures for the corresponding period in the preceding fiscal year accompanied by a certificate of the Chief Financial Officer of IMPSAT which certificate shall state that such financial statements fairly present the financial condition and results of operations, as the case may be, of IMPSAT and its Subsidiaries in accordance with U.S. GAAP, as at the end of, and for, such period (subject to normal year end audit adjustments).

(3) Simultaneously with the delivery of the Financial Statements referred to in clauses (1) and (2) above, a statement certified by the chief or principal financial or accounting officer of the Borrower or IMPSAT, as the case may be:

(i) setting forth in reasonable detail computations evidencing compliance with the covenants set forth in Section 8.3 herein;

(ii) stating that as of the date thereof no Default or Event of Default has occurred and is continuing or exists, or if a Default or Event of Default has occurred and is continuing or exists, specifying in detail the nature and period of existence thereof and any action with respect thereto taken or contemplated to be taken by the Borrower or IMPSAT as applicable; and

(iii) stating that the signer has personally reviewed this Agreement and that such certificate is based on an examination made by or under the direct supervision of the signer sufficient to assure that such certificate is accurate.

(4) Within fifteen (15) days after the delivery of the Financial Statements referred to in clause (1)(i) above, a report that includes calculations showing in reasonable detail the Borrower’s Excess Cash Flow for such fiscal year, if any, certified as correct by the Borrower’s chief or principal accounting or financial officer.

(5) Within fifteen (15) days after the delivery of the Financial Statements referred to in clause (2)(i) above, a report that includes calculations showing in reasonable detail IMPSAT’s Excess Cash Flow for such fiscal year, if any, certified as correct by IMPSAT’s chief or principal accounting or financial officer.

(b) Additional Reporting Requirements.

(1) Without prejudice to the requirement to have such documents approved by the Administrative Agent, promptly upon the execution and delivery thereof, the Borrower shall provide the Administrative Agent with copies of all Project Agreements (including any amendments, additions or replacements).

(2) Promptly upon the completion thereof and in no event later than thirty (30) days thereafter, the Borrower shall provide the Administrative Agent with a copy of any material amendment, addition or revised version of each of the Business Plans.

(3) Promptly upon the execution and delivery thereof, the Borrower shall provide the Administrative Agent with copies of all agreements regarding leases and similar transactions contemplated by Section 8.2(m); provided that the Administrative Agent shall maintain the confidentiality of the parties, terms and conditions of such agreements subject to the exceptions contained in the first paragraph of Section 16.13.

(4) The Borrower shall, and shall cause IMPSAT to, provide to the Administrative Agent and the Lenders copies of any proposed public announcement referencing the Administrative Agent or any of the Lenders by name with respect to any financial accommodation proposed or granted by the Administrative Agent or such Lender before such announcement is made to the public. Subject to Applicable Law, such announcement shall be subject to the prior approval of the Administrative Agent or such Lender, such approval not to be unreasonably withheld. To the extent that Applicable Law requires such public announcement to be filed with any Governmental Authority, the Borrower shall, and shall cause IMPSAT to, provide copies of such public announcement to the Administrative Agent and the Lenders at least two (2) Business Days prior to filing such public announcement with such Governmental Authority.

(5) If requested by the Administrative Agent, the Borrower shall deliver, or cause to be delivered, to the Administrative Agent and the Lenders within forty-five (45) days after the beginning of each fiscal year, updated Borrower and IMPSAT Business Plans, quarterly projections of its and IMPSAT’s anticipated income, expenses, cash flow, assets and liabilities through the Maturity Date prepared in good faith on assumptions believed by Borrower and IMPSAT to be reasonable and in form and substance satisfactory to the Administrative Agent.

(6) The Borrower shall deliver to the Administrative Agent and the Lenders within forty (45) days after the beginning of each fiscal year, an updated Borrower Annual Operating Budget including monthly projections of its anticipated income, expenses, cash flow, assets and liabilities prepared in good faith on assumptions believed by Borrower to be reasonable and in form and substance satisfactory to the Administrative Agent.

(7) From time to time, the Borrower shall deliver to the Administrative Agent such other information regarding the business of the Borrower, its Subsidiaries, IMPSAT, the Project, the Network and the Telecommunications Business as the Administrative Agent or any Lender may reasonably request.

(c) Notices. The Borrower shall promptly, but in no event later than three (3) Business Days after (unless otherwise indicated below) the Borrower obtains knowledge of the occurrence of the following events, give notice to the Administrative Agent of the occurrence of any of the following:

(1) a Default or an Event of Default;

(2) a default by the Borrower, IMPSAT or any of their Affiliates under any Project Agreement;

(3) except to the extent that it could not reasonably be expected to have a Material Adverse Effect, any (i) (A) commencement or Material Adverse Change in respect of any litigation, investigation or proceeding of or before any arbitrator or Governmental Authority; or (B) any material litigation, investigation or proceeding of or before any arbitrator or Governmental Authority which, to the knowledge of the Borrower is threatened by or against the Borrower, IMPSAT, any of their respective Subsidiaries, or against any of their properties or revenues which: (x) purport to affect or pertain to this Agreement or any of the other Project Agreements or any of the transactions contemplated hereby or thereby, or (y) if determined adversely, could reasonably be expected to have a Material Adverse Effect; (ii) issuance by any Governmental Authority of an injunction, writ, temporary restraining order or any order of any nature purporting to enjoin or restrain the execution, delivery or performance of this Agreement or any other Project Agreements, or directing that the transactions contemplated hereunder or thereunder not be consummated as herein or therein provided; (iii) issuance by any Governmental Authority of any injunction, order, decision or other restraint purporting to enjoin, restrain, prohibit (or which would have the effect of prohibiting) the making of the Term Loans, or invalidate (or which would have the effect of invalidating) any provision of this Agreement or any of the other Project Agreements; or (iv) any other event, circumstance or development that could be reasonably expected to cause or result in a Material Adverse Change; and

(4) any material change in the business of the Borrower, any of its Subsidiaries or IMPSAT.

The Administrative Agent shall have the right to request, with respect to any such notice, a statement of an Authorized Officer of the Borrower setting forth reasonable details of the occurrence referred to therein and stating what action the Borrower proposes to take with respect thereto.

(d) Insurance. The Borrower shall:

(1) maintain or cause to be maintained in full force and effect at all times on and after the date hereof and continuing until the Maturity Date, with responsible insurance companies having a Best Insurance Reports rating of A or better and a financial size category of “10” or higher (or other companies reasonably acceptable to the Administrative Agent) and in an amount not less than the amount of the “Term Loans” under and as defined in the Restated Argentine Financing Agreement:

(i) “all risk” property insurance, including earthquake, windstorm and flood, with a limit of loss per occurrence acceptable to the Administrative Agent in its reasonable discretion from time to time;

(ii) equipment and machinery breakdown insurance covering breakdown and resulting damage including rotating equipment such as generators and electrical equipment (including transformers, switch gear and electrical apparatus) for their full replacement value;

(iii) business interruption insurance covering risk of loss as a result of

the cessation or material interruption of the Telecommunications Business resulting from an insured loss under the Borrower’s property policy for an indemnity period of six (6) months or any part thereof, the initial amount of such insurance to provide for the payment during the six (6) months commencing from the date hereof of not less than the gross revenues to be earned by the Borrower for such six (6) month period, calculated based on the Business Plans and to be adjusted by the Borrower semiannually from the date hereof thereafter, less any non-continuing costs and expenses during the relevant indemnity period, provided, however, in no event shall the Borrower be required to obtain insurance coverage greater than is customary for similarly situated businesses in the Borrower’s industry; and

(iv) third party liability insurance, including bodily injury and property damage, with a limit of no less than two million Dollars (US$2,000,000) per occurrence.

(2) within sixty (60) days after receipt by the Borrower of a written request from the Administrative Agent, accompanied by a pro forma political risk insurance policy which contains terms and conditions commercially reasonable under then current market conditions, and the obtention of which will not increase the “all-in” financing cost of the Term Loans to the Borrower, obtain such a policy and maintain such political risk insurance in full force and effect until the Maturity Date.

(3) file with the Administrative Agent not more than seven (7) days after each policy anniversary, certificates of all insurance then in effect, stating the names of the insurance companies, the amounts of the insurance, the dates of the expiration thereof and the properties and risks covered thereby and specifically listing the special provisions enumerated for such insurance required by this Section 8.1(d).

The certificates of insurance referred to in clause (3) hereof shall be executed by an authorized representative of each insurer, and certify that all premiums and other payments required in respect of such insurance have been timely paid and that such insurance is otherwise not subject to cancellation, modification or change in coverage by the insurer during its term, except for nonpayment of premiums, in which case at least fifteen (15) days prior written notice of termination must be given to the Administrative Agent.

In each case, the insurance policies shall designate the Administrative Agent as additional insured in respect of the liability insurance related to the Equipment and the sole loss payee in respect of the property insurance related to the Equipment. All amounts payable to the Administrative Agent according to the foregoing under property insurance policies shall be paid to an account of the Administrative Agent (i) upon the occurrence of an Event of Default; or (ii) if the insured loss materially impairs the Borrower’s ongoing operations. In such event, funds received by the Administrative Agent under such property insurance policies shall be made available to the Borrower for application to the costs of repairing, restoring, rebuilding or replacing the portion of the assets with respect to which such proceeds were obtained. The Administrative Agent shall at the request of the Required Lenders pay any insurance premiums directly, on Borrower’s behalf, and Borrower shall reimburse Lenders through the Administrative Agent promptly for any such payment made by Lenders, provided, however, the Administrative Agent shall have no obligation to pay any such insurance premiums.

The Administrative Agent reserves the right at any time upon any material change in the risk profile of the Borrower or its Subsidiaries (including any change in the business conducted by any such Person or any Applicable Law affecting the potential liability of such Person) to require additional forms and limits of insurance to, in the Administrative Agent’s reasonable opinion, ensure that each of the Borrower and its Subsidiaries are protected by insurance in amounts and coverage customary for its industry. If requested by the Administrative Agent, which request shall not be made more frequently than once in any calendar year, each of the Borrower and its Subsidiaries shall deliver to the Administrative Agent from time to time a report of a reputable insurance broker, satisfactory to the Administrative Agent, with respect to its insurance polices.

(e) Compliance with Applicable Law and Contracts. The Borrower shall, and shall cause its Subsidiaries to, comply in all material respects with:

(1) the requirements of all Applicable Law, including obtaining and maintaining all Governmental Approvals. If any authorization, consent, approval, permit or license from any Governmental Authority shall become necessary or required in order to fulfill the obligations hereunder or under any of the other Financing Documents, the Borrower shall immediately take or cause to be taken all reasonable steps to obtain such authorization, consent, approval, permit or license and furnish the Administrative Agent evidence thereof;

(2) the provisions of its respective Charter Documents; and

(3) all Material Agreements to which it respectively is a party.

(f) Operation of the Network. The Borrower shall operate and maintain the Network, and retain and maintain the staff sufficient to operate and maintain the Network, in accordance with the Business Plans, and otherwise comply in all material respects with, and satisfy the requirements of, all Licenses and Applicable Laws.

(g) Taxes, etc. The Borrower shall pay, or arrange for payment, prior to the date when due of all (1) taxes imposed on the Borrower and its Subsidiaries, and (2) present and future claims, levies, or liabilities (including, without limitation, claims for labor, service, materials and supplies) for sums which have become due and payable and which, if unpaid, might by law become a Lien or otherwise have a Material Adverse Effect, except for any such tax, claim, levy or liability the payment of which is being contested in good faith by proper proceedings diligently conducted for which adequate cash reserves determined in accordance with Argentine GAAP have been established and are being maintained, (and as to which it or its property is not yet subject to foreclosure, seizure, arrest, sale, collection, levy or loss on account thereof). The Borrower shall make timely and accurate filings of all tax returns and material governmental reports required to be filed or submitted under any Applicable Laws, and shall otherwise take such actions as are necessary to comply with Applicable Laws relating to taxes.

(h) Maintenance of Books and Records; Access. The Borrower shall, and shall cause each of its Subsidiaries to, keep adequate books and records of account, in which complete and accurate entries will be made in accordance with Argentine GAAP, reflecting the financial

condition of the Borrower and its Subsidiaries and shall permit the Administrative Agent and the Lenders, and any of their respective officers, employees and agents, at all reasonable times and with prior notice to the Borrower, (i) to inspect, audit and make extracts of the books and records of such Person; (ii) to inspect the properties and facilities of such Person; (iii) to discuss such books and records with the representatives, employees (including officers) and accountants of such Person and with the Independent Auditor; and (iv) to inspect, review, evaluate and make test verifications and counts of such Person’s accounts, the Equipment and assets; in each case at the Lender’s expense, unless a Default or an Event of Default exists.

The Borrower shall promptly supply to the Administrative Agent copies of any reports on its or its Subsidiaries’ business and activities which are publicly distributed as well as any other reports thereon and reports made to any Governmental Authority as the Administrative Agent may from time to time reasonably request.

The Borrower shall maintain an adequate billing, software and accounting system, including books, accounts and records, and shall prepare all financial statements required hereunder in accordance with Argentine GAAP, consistently applied, and in compliance with all Applicable Laws.

If a Default or Event of Default shall have occurred and be continuing each of the Borrower and its Subsidiaries shall make available to the Administrative Agent and its counsel, as quickly as is possible under the circumstances, originals or copies of all books and records which the Administrative Agent may reasonably request and deliver any document or instrument necessary for the Administrative Agent, as it may from time to time reasonably request, to obtain records from any service bureau or other Person which maintains records for the Borrower or its Subsidiaries.

(i) Rank of Debt. The Borrower shall take any and all action necessary to ensure that the Term Loans at all times continue to be the direct and unconditional obligation of the Borrower and rank at least pari passu (in respect of priority of payment, security or otherwise) to all other secured or unsecured Indebtedness of the Borrower, except that such ranking shall not apply to the rights of secured Indebtedness over collateral subject to Permitted Liens that are purchase money Liens or that have priority under Applicable Law.

(j) Payment of Obligations. The Borrower shall, and shall cause each of its Subsidiaries to, pay or discharge obligations that if not paid, could result in a Material Adverse Effect, before the same shall become delinquent or in default, except where (1) other than as to the obligations described in (2) below (w) the validity or amount thereof is being contested in good faith by appropriate proceedings diligently conducted: (x) adequate cash reserves have been established with respect thereto in accordance with Argentine GAAP; (y) the failure to make payment pending such contest could not reasonably be expected to result in a Material Adverse Effect and (z) proceedings to foreclose any Lien which may have attached as security for such obligation have not commenced, or (2) with regard to any Existing Indebtedness (x) the Borrower is diligently and in good faith pursuing a settlement and restructuring of such obligations; (y) no judgment has been entered which would constitute a Default under Section

10.1(l); and (z) proceedings to foreclose any Lien which may have attached as security for such obligation have not commenced.

(k) Environmental Matters. The Borrower shall promptly give to the Administrative Agent notice in writing if the Borrower or any Subsidiary thereof (1) receives any complaint, order, citation, notice of inquiry, proceeding, investigation or action or other written communication from any Person with respect to, or (2) otherwise acquires actual knowledge of (i) the existence or alleged existence of any Environmental Liability or any actual or alleged violation of any applicable Environmental Law arising at, upon, under, within or in connection with any property now or previously owned, leased, operated or used by the Borrower, IMPSAT or any of their respective past or present Subsidiaries, or any part thereof, or due to the operations or activities of any such Person, on or in connection with such property or any part thereof (including receipt by the Borrower or its Affiliates of any notice of the happening of any event involving the release of a reportable quantity of any Hazardous Substance under any applicable Environmental Law or cleanup of any Hazardous Substance), (ii) any release of any Hazardous Substance on such property or any part thereof in a quantity that is reportable under any applicable Environmental Law, (iii) the commencement of any cleanup pursuant to or in accordance with any applicable Environmental Law of any Hazardous Substances on or about such property or any part thereof, and (iv) any pending or threatened proceeding for the termination, suspension or non-renewal of any permit required under any applicable Environmental Law. The Borrower shall obtain (at its sole cost and expense) and deliver to the Administrative Agent on behalf of the Lenders such environmental site assessments, reports or studies that the Administrative Agent shall reasonably require from time to time.

(l) Licenses. The Borrower shall, and shall cause its Subsidiaries (1) to maintain the Licenses in full force and effect, at all times on and after the date hereof; (2) upon receipt of any notification from any Governmental Authority that the Borrower is in breach of any License, or that any License is subject of an inquiry, proceeding or investigation: (i) promptly notify the Administrative Agent thereof, providing copies of all relevant documents, correspondence and other information; and (ii) take prompt and adequate remedial action to remedy such breach, which action shall be taken within the cure period, if any, set out in such notification and (3) provide copies of all material notices and correspondence received from, or sent to, any Governmental Authority relating to the Borrower, IMPSAT, the Licenses or the Network.

(m) Regulatory Filings. The Borrower shall, and shall cause its Subsidiaries to, deliver to the Administrative Agent, promptly after the sending or filing thereof, copies of all non-confidential reports filed by the Borrower, any of its Subsidiaries or IMPSAT with the SC, the United States Securities and Exchange Commission, the Central Bank, the Argentine National Securities Commission (Comisión Nacional de Valores) or the Buenos Aires Stock Exchange and all non-confidential reports filed with any other Governmental Authority, except, in all such cases, reports the failure of which to be filed could not reasonably be expected to have a Material Adverse Effect.

(n) Continuance of Business. The Borrower shall, and shall cause its Subsidiaries to, (x) do or cause to be done all things necessary to maintain, renew and keep in full force and effect (i) the Licenses and relevant Governmental Approvals, (ii) their respective corporate

existence and good standing and (iii) all other rights and privileges and franchises related to Telecommunications Business, except in the case of clauses (ii) and (iii) to the extent that the failure to do so would not have a Material Adverse Effect, and (y) continue to engage primarily in the business now conducted by it.

(o) MU Expenses. The Borrower shall invoice and collect from Affiliates of the Borrower not less than 50% of all MU Expenses incurred during each calendar quarter, such amounts to be collected not later than 30 days after the end of such calendar quarter, provided, however, that if for any calendar quarter the Borrower invoices and collects less than the entire required amount of MU Expenses, it shall not be in breach of this covenant if, within the same 30-day period, IMPSAT makes a contribution to the Borrower’s Paid In Capital, in cash or by means of the capitalization of Indebtedness, in an amount equal to the amount of the deficiency.

(p) Maintenance of Assets. The Borrower shall, and shall cause its Subsidiaries to, do or cause to be done all things necessary to maintain all of its assets material to the Telecommunication Business in good repair, working order and condition (ordinary wear and tear excepted) and supplied with all necessary equipment.

(q) INTENTIONALLY OMITTED.

(r) INTENTIONALLY OMITTED.

(s) Further Assurances. The Borrower shall, and shall cause its Subsidiaries to, at such Person’s expense and upon the request of the Administrative Agent, duly execute and deliver, or cause to be duly executed and delivered, to the Administrative Agent and the Lenders such further instruments and do and cause to be done such further acts as may be necessary or proper in the reasonable opinion of the Administrative Agent to carry out more effectively the provisions and purposes of this Agreement or any other Financing Document.

Section 8.2. Negative Covenants.

Until the Maturity Date, and so long as this Agreement remains in effect, the Borrower shall comply in all respects with each of the following covenants and agreements:

(a) Fundamental Changes. The Borrower shall not, and shall not permit its Subsidiaries to, dissolve, liquidate, merge with another Person or, except as permitted by Section 8.2(k), create any new Subsidiary without the prior written consent of the Administrative Agent on behalf of the Required Lenders.

(b) Liens. The Borrower shall not, and shall not permit its Subsidiaries to, create, incur, assume or suffer to exist, any Lien upon or with respect to such Person’s accounts receivable, the Collateral (as defined in the Restated Argentine Financing Agreement) any rights under the Licenses, any Governmental Approvals or in or to the Network or the Project Agreements or any other tangible or intangible property or assets, or any part thereof, of such Person other than any Permitted Lien.

(1) reduce such Person’s capital; or

(2) declare or pay any dividends or make any distributions or other payments or delivery of property or cash in respect of: (i) the interest of such Person’s shareholders or other equity owners; or (ii) any Indebtedness which is by its terms subordinate or junior in right of payment to the Term Loans, except that the Borrower may pay dividends or make a distribution or other payment of interest or principal of Intercompany Indebtedness owing to IMPSAT the purpose of which is to assist IMPSAT to make interest payments as and when due under the Series A and Series B Convertible Notes, but only if at the time of and after giving effect to such distribution:

A. no Default or Event of Default shall have occurred and be continuing;

B. the aggregate amount of all such distributions by the Borrower during the fiscal year of the Borrower in which the date of such distribution occurs shall not exceed the lesser of (x)(1) two times the Borrower’s EBITDA for the two consecutive fiscal quarters ending with the fiscal quarter most recently ended prior to the date of such dividend, distribution or payment (the “Preceding Fiscal Quarter”), minus (2) the aggregate amount of Debt Service payable by the Borrower and its Subsidiaries during the 12 calendar months next following the Preceding Fiscal Quarter and (y) twenty-five percent (25%) of the sum of IMPSAT’s projected non-consolidated (1) Delaware state franchise taxes for such fiscal year, (2) director and officer liability insurance premiums for such fiscal year and (3) non-consolidated interest expenses for such fiscal year.

(d) Guarantees. The Borrower shall not, and shall not permit its Subsidiaries to, enter into or become bound by any agreements guaranteeing the Indebtedness of another Person, except as permitted by clauses (a) (c) and (d) of the definition of “Permitted Indebtedness.”

(e) Document Amendments. The Borrower shall not, and shall not permit its Subsidiaries to, agree to any modification, amendment, waiver, supplement, rescission or termination (collectively, “Amendment”) of any (i) License, (ii) Governmental Approval (other than Licenses), (iii) Project Agreement or (iv) Material Agreement, without, in each case, the prior written approval of the Administrative Agent on behalf of the Required Lenders, except to the extent that such Amendment could not reasonably be expected to have a Material Adverse Effect; provided, however, that in the case of clause (i), the Borrower shall give the Administrative Agent no less than five (5) Business Days prior written notice of such Person’s proposed Amendment during which period the Administrative Agent shall have the exclusive right (which it shall not exercise unreasonably) to reject such Amendment.

(f) Transactions with Affiliates. Except as expressly permitted by this Agreement, the Borrower shall not, and shall not permit its Subsidiaries to, directly or indirectly, enter into any transaction with an Affiliate, except in the ordinary course of and pursuant to the reasonable requirements of the business of the Borrower and upon commercially reasonable terms no less

favorable to the Borrower than those that could be obtained on an arm’s length basis from a Person which is not an Affiliate.

(g) Indebtedness. The Borrower shall not, and shall not permit its Subsidiaries to, incur, create, assume or suffer to exist, or permit to incur, create, assume or suffer to exist, or become or remain liable, for or on account of any Indebtedness except (1) Indebtedness hereunder, and (2) Permitted Indebtedness.

(h) Non-Related Activities. The Borrower shall not, and shall not permit its Subsidiaries to, engage, directly or indirectly, in any activity, unless such activity is, directly or indirectly, related to the Telecommunications Business of each such Person as conducted and proposed to be conducted on the date hereof, without the prior written consent of the Administrative Agent on behalf of the Required Lenders.

(i) Corporate Actions. The Borrower shall not, and shall not permit its Subsidiaries to, (i) change or otherwise alter the end of such Person’s fiscal year or such Person’s corporate purpose, or (ii) otherwise amend such Person’s Charter Documents in any manner without the prior written consent of the Administrative Agent on behalf of the Required Lenders; except in the case of clause (ii) as could not reasonably be expected to have a Material Adverse Effect.

(j) Disposals. The Borrower shall not, and shall not permit its Subsidiaries to, (whether by a single transaction or a number of related or unrelated transactions and whether at one time or over a period of time) Dispose of any such Person’s property or assets, whether tangible or intangible, in each case other than as permitted under the Restated Argentine Financing Agreement or with respect to Permitted Disposals.

(k) Investments. The Borrower shall not, and shall not permit any of its Subsidiaries to make any Investment other than (i) Permitted Investments or (ii) Investments in one or more Persons which will, upon the making of such Investment, become a Subsidiary or be merged or consolidated with or into or transfer or convey all or substantially all of its assets to, the Borrower or a Subsidiary thereof; provided, however, that (1) such Person’s primary business is the Telecommunications Business, (2) the Borrower would have been in compliance with the covenants contained in Section 8.3 of this Agreement as of the end of the last four fiscal quarters, giving pro forma effect to such Investment, and the projections for the Borrower, giving effect to such Investment, would be in compliance with the covenants contained in Section 8.3 of this Agreement as of the end of the next four fiscal quarters, (3) no Indebtedness is assumed or incurred in connection with the acquisition other than Permitted Indebtedness, (4) such Person shall have executed and delivered a guaranty of the Obligations to the Administrative Agent for the benefit of the Lenders in form an substance satisfactory to the Administrative Agent on behalf of the Lenders and (5) such Person (except where such Person is merged into the Borrower or a Subsidiary thereof) agrees in writing to be bound by the terms of the Financing Documents; and provided further that an Investment will not be permitted under this clause (ii) if the sum of consideration to be paid in respect of such Investment plus the consideration paid in respect of all previous Investments made under this clause (ii) exceeds US$2,000,000 in the aggregate. For purposes of the foregoing clause, “consideration” shall mean with respect to any acquisition all cash and non-cash consideration actually paid or required to be paid by the

Borrower or any of its Subsidiaries, including the principal amount of any assumed Indebtedness and deferred amounts in the nature of holdbacks (to the extent not distributed to the Borrower or any of its Subsidiaries.

(l) Change in Accounting Policies. The Borrower shall not, and shall not permit any of its Subsidiaries to, make any change in accounting policies or reporting practices (including changing its fiscal year) which, individually or in the aggregate, materially affects any determination as to the Borrower’s compliance with its Obligations, including any financial covenants, without the prior written consent of the Administrative Agent on behalf of the Required Lenders; provided that if such change is required by Argentine GAAP, the Borrower shall, prior to making such change, only be required to notify the Administrative Agent of such change and the effect thereof.

(m) Leases. The Borrower shall not, and shall not permit any of its Subsidiaries to, without the prior written consent of the Administrative Agent on behalf of the Required Lenders, enter into any lease (including an IRU of the type referred to in clause (b) of the definition of “IRU”) or similar transaction with any Person for the use of any part of the Network except leases or similar transactions in the ordinary course of business.

(n) Unscheduled Payments. The Borrower shall not, and shall not permit any of its Subsidiaries to, make any voluntary or optional principal or unscheduled interest payment on any Indebtedness other than (i) the Obligations, (ii) Indebtedness of the type referred to in clause (b) of the definition of “Permitted Indebtedness”, so long as such payment is otherwise in compliance with Section 8.2(c), or (iii) in connection with a settlement or restructuring of any Existing Indebtedness; provided that (1) such payment of any of the Existing Indebtedness could not reasonably be expected to have a Material Adverse Effect, and (2) the aggregate amount of all such payments shall not exceed US$2,000,000 (unless the amount of such payment is distributed by IMPSAT to the Borrower in the form of a cash capital contribution.

(o) Extension of Accounts. With respect to any accounts receivable of the Borrower or its Subsidiaries, the Borrower shall not, and shall cause its Subsidiaries not to, (i) grant any material extension of the time of payment of any thereof, (ii) compromise, compound or settle for a material amount less than the full amount thereof, (iii) release any Person liable for the payment thereof or (iv) allow any credit or discounts whatsoever thereon, in each case which extension, discounts, credits, releases, compromises, compounds or settlements could reasonably be expected to have a Material Adverse Effect.

Section 8.3. Financial Covenants.

(a) Borrower’s Net Debt to Paid in Capital Ratio. The Borrower shall not at any time permit the ratio of (i) the Borrower’s Net Debt outstanding on the last day of any fiscal quarter to (ii) the Borrower’s Paid in Capital on such date, to exceed a ratio of 0.27 to 1.00.

(b) Debt Service Coverage Ratio. The Borrower shall not at any time permit the ratio of (i) two times the Borrower’s EBITDA for the two consecutive fiscal quarters ending on the date set forth below to (ii) the Borrower’s Debt Service for the four (4) consecutive fiscal quarters ending on such date, to be less than the ratio set forth opposite such date below:


Date	Ratio

The last day of each fiscal quarter of 2005		0.56:1
The last day of each fiscal quarter of 2006		0.82:1
The last day of each fiscal quarter of 2007		0.98:1
The last day of each fiscal quarter of 2008		1.39:1

(c) Borrower’s Minimum EBITDA. The Borrower shall not at any time permit its EBITDA for any fiscal year set forth below to be less than the amount set forth opposite such date below:


Fiscal Year		Minimum EBITDA

2003		US$(1,300,000)
2004		US$(400,000)

(d) Interest Service Coverage Ratio. The Borrower shall not at any time permit the ratio of (i) two times the Borrower’s EBITDA for the two consecutive fiscal quarters ending on the date set forth below to (ii) the Borrower’s Interest Expense for the four (4) consecutive fiscal quarters ending on such date, to be less than ratio set forth opposite such date below:


Date	Ratio

The last day of each fiscal quarter of 2005		0.73:1
The last day of each fiscal quarter of 2006		2.03:1
The last day of each fiscal quarter of 2007		3.60:1
The last day of each fiscal quarter of 2008		6.68:1

(e) Current Ratio. The Borrower shall not at any time permit the ratio of (i) the Borrower’s Current Assets on the last day of any fiscal quarter set forth below to (ii) the Borrower’s Current Liabilities for the period ending on such date, to be less than the ratio set forth opposite such date below:


Fiscal Quarter	Ratio

Each fiscal quarter of 2003		0.66:1
Each fiscal quarter of 2004		0.48:1
Each fiscal quarter of 2005		0.49:1
Each fiscal quarter of 2006		0.51:1
Each fiscal quarter of 2007		0.57:1
Each fiscal quarter of 2008		0.63:1

(f) Capital Expenditures Ratio. The Borrower shall not at any time make Capital Expenditures in a particular fiscal quarter to the extent that the making of such Capital Expenditures would cause the ratio of (i) the Borrower’s Capital Expenditures for any fiscal quarter set forth below to (ii) Revenues (excluding Revenues attributable to IRUs recognized as Revenues during such period) for such fiscal quarter to exceed the ratio set forth opposite such fiscal quarter below:


Fiscal Quarter	Ratio

Each fiscal quarter of 2003		0.20:1
Each fiscal quarter of 2004		0.20:1
Each fiscal quarter of 2005		0.17:1
Each fiscal quarter of 2006		0.12:1
Each fiscal quarter of 2007		0.12:1
Each fiscal quarter of 2008		0.12:1

SECTION 9. EXCHANGE OPTIONS

Section 9.1. Option to Exchange.

On any date prior to the date which is six (6) months after the Closing Date, the Borrower shall have the option, exercisable in its sole discretion, provided no Event of Default has occurred and is continuing both on the date the Exchange Notice is given and on the date the Exchange is consummated, to exchange (the “Exchange Option”) an aggregate principal amount of $6,574,919 of the Term Loans (allocated pro rata among all of the Term Loans held by the Lenders) for Series B Convertible Notes in an aggregate principal amount of $1,689,000 plus Warrants in an amount to entitle the holders thereof, in the aggregate, to acquire 101,934

shares of New Common Stock, which Warrants shall be issued pursuant to the Warrant Agreement.

The Series B Convertible Notes issued to the Lenders pursuant to the exercise of the Exchange Option shall be issued under and subject to all of the terms and provisions of the Indenture under which the Series B Convertible Notes were issued on the Closing Date.

Section 9.2. Exchange Instruments.

(a) In order to exercise the Exchange Option permitted by the terms hereof, the Borrower shall deliver to the Agent a notice (an “Exchange Notice”) not less than five (5) Business Days prior to the date on which the Exchange is to be consummated, which notice shall (x) refer to this Section 9, and be accompanied by (1) an officer’s certificate of the Borrower certifying that no Event of Default has occurred and is continuing and that the officers of the Borrower executing any and all documents in connection with the Exchange were duly authorized to do so, and (2) an officer’s certificate of IMPSAT certifying that the officers of IMPSAT executing any and all documents in connection with the Exchange (including, without limitation, the Exchange Assignment Agreement, the Exchange Agreement, the Series B Convertible Notes, the Warrant Agreement and the Warrants) were duly authorized to do so, and (y) state the date (the “Exchange Date”) of issuance of the Series B Convertible Notes to be so issued upon consummation of the Exchange.

(b) On the Exchange Date, (i) the Borrower and IMPSAT shall execute and deliver the Exchange Assignment Agreement, (ii) the Borrower shall cause IMPSAT to execute and deliver the Exchange Agreement and (iii) the Borrower shall cause IMPSAT to issue to the Agent, on behalf of the Lenders, the Series B Convertible Notes in an aggregate principal amount of $1,689,000, plus the Warrants, such Series B Convertible Notes and Warrants to be issued to each Lender on a pro rata basis based on the amount of the Term Loans held by such Lender to the amount so exchanged pursuant to the Warrant Agreement and (iv) the Borrower shall deliver an opinion of counsel on behalf of the Borrower and IMPSAT covering such matters relating to the Exchange, and the documents, agreements and instruments executed and delivered in connection therewith, as reasonably requested by the Agent.

(c) Counterparts. The Borrower shall reimburse the Agent and Lenders upon demand for all reasonable costs and expenses (including reasonable attorneys’ fees and expenses) incurred by the Agent and Lenders in connection with any actions taken by it pursuant to this Section.

SECTION 10. EVENTS OF DEFAULT

Section 10.1. Events of Default.

Each of the following events shall constitute an “Event of Default” hereunder:

(a) Non-Payment. The Borrower shall fail to pay:

(1) any installment of the principal amount of any Term Loan as and when the same becomes due and payable hereunder (whether at stated maturity, by acceleration, mandatory prepayment or otherwise); or

(2) any interest on any Term Loan or any other amount payable hereunder or under any Note, when and as the same shall become due and payable (whether at stated maturity, by acceleration, mandatory prepayment or otherwise) and such failure shall continue unremedied for three (3) Business Days.

(b) Representations and Warranties. Any representation, warranty, certification or statement made by or on behalf of the Borrower, any Subsidiary thereof or IMPSAT in any Financing Document or any amendment thereof or in any certificate, report, financial statements or opinion delivered pursuant to or otherwise in connection with any Financing Document shall prove to have been false, incorrect, or misleading in any material respect as of the time made, delivered or deemed made or delivered.

(c) Covenants.The Borrower, any Subsidiary thereof or IMPSAT shall fail to perform or observe any term, covenant, condition or agreement:

(1) contained in this Agreement (other than the covenants contained in Section 8.1) or any other Financing Document and such default shall continue beyond any cure or grace period specifically applicable thereto pursuant to the terms of such Financing Document; or

(2) contained in Section 8.1 hereof and such default shall continue unremedied for a period of ten (10) Business Days after the earlier of (i) the date on which the Borrower obtains knowledge of such default or (ii) the date on which notice thereof shall have been received by the Borrower from the Administrative Agent (which notice will be given at the request of any Lender).

(d) IMPSAT Convertible Notes. IMPSAT or any of its Subsidiaries shall default in:

(1) any payment of any Indebtedness under the IMPSAT Convertible Notes; or

(2) the observance or performance of any agreement, covenant or condition under the IMPSAT Convertible Notes or any instrument or agreement evidencing, securing or relating thereto, or any other event shall occur or condition exist, the effect of which default or other event or condition is to cause, or to permit the holder of any IMPSAT Convertible Note to cause any such Indebtedness to become due or subject to mandatory repurchase or repayment prior to its stated maturity.

(e) Argentine Agreements; Brazil Agreements. An event of default shall have occurred under any of the Restated Argentine Financing Agreement, the Nortel Brazil Financing Agreement or any of the Financing Documents as defined in the Restated Argentine Financing Agreement.

(f) Default Under Other Indebtedness.

(1) The Borrower, any Subsidiary thereof or IMPSAT shall default in any payment of any Indebtedness (other than the Term Loans under this Agreement or the loans under the Nortel Brazil Financing Agreement) aggregating in excess of five million Dollars (US$5,000,000); provided, however, that the foregoing shall not apply to the Existing Indebtedness;

(2) The Borrower, any Subsidiary thereof or IMPSAT shall default in the observance or performance of any agreement or condition relating to any Indebtedness (other than the Financing Documents, Nortel Brazil Financing Agreement or the IMPSAT Convertible Notes) aggregating in excess of five million Dollars (US$5,000,000), or contained in any instrument or agreement evidencing, securing, or relating thereto, or any other event shall occur or condition exist, the effect of which default or other event or condition is to cause, or to permit the holder of such Indebtedness to cause any such Indebtedness to become due or subject to mandatory repurchase or repayment prior to its stated maturity; provided, however, that the foregoing shall not apply to the Existing Indebtedness.

(3) Any Material Subsidiary of IMPSAT shall default in any payment of any Indebtedness (other than the Term Loans under this Agreement or the loans under the Nortel Brazil Financing Agreement) aggregating in excess of five million Dollars (US$5,000,000); or

(4) Any Material Subsidiary of IMPSAT shall default in the observance or performance of any agreement or condition relating to any Indebtedness (other than the Financing Documents, Nortel Brazil Financing Agreement or the IMPSAT Convertible Notes) aggregating in excess of five million Dollars (US$5,000,000), or contained in any instrument or agreement evidencing, securing, or relating thereto, or any other event shall occur or condition exist, with respect to which default or other event or condition, the holders of such Indebtedness have caused any such Indebtedness to become due or subject to mandatory repurchase or repayment prior to its stated maturity.

(g) Bankruptcy. The Borrower, any Subsidiary thereof, IMPSAT or any Material Subsidiary of IMPSAT shall commence a voluntary case concerning itself under any bankruptcy law of Argentina (including, without limitation, Argentine Law No. 24.522) or any other jurisdiction or Title 11 of the United States Code entitled “Bankruptcy,” as now or hereafter in effect, or any successor thereto (the “Bankruptcy Code”); or an involuntary case is commenced against the Borrower, any Subsidiary thereof, IMPSAT or any Material Subsidiary of IMPSAT under any such laws, and the petition is not contested within 10 days, or is not dismissed within 30 days, after commencement of the case; or a custodian (as defined in the Bankruptcy Code) is appointed for, or takes charge of, all or substantially all of the property of the Borrower, any Subsidiary thereof, IMPSAT or any Material Subsidiary of IMPSAT, or the Borrower, any Subsidiary thereof, IMPSAT or any Material Subsidiary of IMPSAT commences any other proceeding under any reorganization, arrangement, adjustment of debt, relief of debtors, dissolution, insolvency or liquidation or similar law of any jurisdiction whether now or hereafter in effect relating to the Borrower, any Subsidiary thereof, IMPSAT or any Material Subsidiary of IMPSAT, or there is commenced against the Borrower, any Subsidiary thereof, IMPSAT or any

Material Subsidiary of IMPSAT any such proceeding which remains undismissed for a period of thirty (30) days; or the Borrower, any Subsidiary thereof, IMPSAT or any Material Subsidiary of IMPSAT is adjudicated insolvent or bankrupt; or any order of relief or other order approving any such case or proceeding is entered; or the Borrower, any Subsidiary thereof, IMPSAT or any Material Subsidiary of IMPSAT suffers any appointment of any custodian or the like for it or any substantial part of its property to continue undischarged or unstayed for a period of thirty (30) days; or the Borrower, any Subsidiary thereof, IMPSAT or any Material Subsidiary of IMPSAT makes a general assignment for the benefit of creditors; or the Borrower, any Subsidiary thereof, IMPSAT or any Material Subsidiary of IMPSAT shall generally not pay its debts as they become due or there shall otherwise occur a cesación de pagos (within the meaning of Argentine law); or any corporate action is taken by the Borrower, any Subsidiary thereof, IMPSAT or any Material Subsidiary of IMPSAT for the purpose of effecting any of the foregoing.

(h) Financing Documents. Any Financing Document shall cease to be in full force and effect, or shall cease to give the Lenders the material rights, powers and privileges purported to be created thereby.

(i) Licenses. Any Governmental Authority shall commence any proceeding to cancel, revoke, suspend or substantially and adversely modify any License necessary for the Project, which proceeding (i) could reasonably be expected to have a Material Adverse Effect, and (ii) has not been stayed or enjoined within five Business Days after the commencement of any such proceeding.

(j) Governmental Actions.

(1) Any Governmental Authority shall have (A) condemned, nationalized, seized, compulsorily acquired, or otherwise expropriated all or any material part of the property or other assets of the Borrower or any of its Subsidiaries or of any capital stock of the Borrower or any of its Subsidiaries, or (B) assumed custody or control either of such property or other assets or of the business or operations of the Borrower or any of its Subsidiaries or of their capital stock, or shall have taken any action for the dissolution of the Borrower or any of its Subsidiaries or any other action that would prevent the Borrower or any of its Subsidiaries or their respective officers from carrying on the business or operations of the Borrower or any such Subsidiary in all material respects; provided, however, that this paragraph shall not apply to any Subsidiary of the Borrower (i) the property or assets of which do not comprise part of the Network, (ii) which is not a party to any of the Financing Documents and (iii) the total Equity of which is less than one hundred thousand Dollars (US$100,000), unless the Governmental Action in question is reasonably likely to have a Material Adverse Effect.

(2) Any Governmental Approvals material for the operation or maintenance of the Network shall cease to be in full force and effect. A Governmental Approval shall be deemed to cease to be in full force and effect (x) when an order revoking or terminating said Governmental Approval shall be issued and such order is no longer subject to further administrative and judicial review, or (y) when any Governmental Authority having jurisdiction over any such Governmental Approval shall, prior to the termination thereof, decide not to renew

such Governmental Approval and such decision shall not be subject to further administrative or judicial review.

(k) Judgments.

(1) A final judgment, award, decree, fine or penalty for the payment of money in respect of any Existing Indebtedness in excess of five million dollars (US$5,000,000) individually or in the aggregate shall be rendered by one or more courts, administrative tribunals or other bodies having jurisdiction against the Borrower or any of its Subsidiaries, and the same shall not be discharged (or provision satisfactory to the Administrative Agent shall not be made for such discharge), or a stay of execution thereof shall not be procured, within thirty (30) days from the date of entry thereof, and the Borrower, within such thirty (30) day period or such longer period during which the execution of such judgment or judgments shall have been stayed, shall not have appealed therefrom and caused the execution thereof to be stayed during such appeal.

(2) Other than in respect of any Existing Indebtedness, a final judgment, award, decree, fine or penalty for the payment of money in excess of one million Dollars (US$1,000,000) individually or in the aggregate shall be rendered by one or more courts, administrative tribunals or other bodies having jurisdiction against the Borrower or its Subsidiaries, and the same shall not be discharged (or provision satisfactory to the Administrative Agent shall not be made for such discharge), or a stay of execution thereof shall not be procured, within thirty (30) days from the date of entry thereof, and the Borrower, within such thirty (30) day period or such longer period during which the execution of such judgment or judgments shall have been stayed, shall not have appealed therefrom and caused the execution thereof to be stayed during such appeal.

(3) A final judgment, award, decree, fine or penalty for the payment of money in excess of five million Dollars (US$5,000,000) individually or in the aggregate shall be rendered by one or more courts, administrative tribunals or other bodies having jurisdiction against IMPSAT or any of its Material Subsidiaries, and the same shall not be discharged (or provision satisfactory to the Administrative Agent shall not be made for such discharge), or a stay of execution thereof shall not be procured, within thirty (30) days from the date of entry thereof, and IMPSAT, within such thirty (30) day period or such longer period during which the execution of such judgment or judgments shall have been stayed, shall not have appealed therefrom and caused the execution thereof to be stayed during such appeal.

(l) Currency Restrictions. Argentina or any Governmental Authority thereof shall impose restrictions on the free transferability of Dollars to or from Argentina or Dollars shall, in the reasonable judgment of the Required Lenders, be unavailable within Argentina at a commercially reasonable rate of exchange, and the Borrower shall not, within ten (10) Business Days after notice from the Administrative Agent, have demonstrated to the satisfaction of the Administrative Agent that such restrictions will not have a Material Adverse Effect on the ability of the Borrower to perform its Obligations or on the availability of Dollars for purposes of paying any amounts required to be paid pursuant to this Agreement or the other Financing Documents; provided, however, (without in any way limiting the obligations of the Borrower

under Section 4, including the obligation of the Borrower to discharge the Obligations in Dollars), that the foregoing shall not apply to any such restrictions in effect as of the date hereof or any extensions of time of any such restrictions in effect as of the date hereof.

(m) INTENTIONALLY OMITTED.

(n) Change in Control. A Change in Control shall have occurred without the prior written approval of the Lenders holding at least sixty six and two thirds percent (66 2/3%) in aggregate principal amount of the Term Loans then outstanding.

(o) Legal Existence; Taxes. The Borrower or IMPSAT shall have failed to maintain its legal existence or the Borrower, any Subsidiary thereof or IMPSAT shall have failed to pay taxes as they come due.

(p) INTENTIONALLY OMITTED

(q) Material Adverse Change. A Material Adverse Change shall have occurred.

Section 10.2. Remedies Upon Event of Default.

(a) Rights and Remedies. If any Event of Default (other than the Event of Default referred to in Section 10.1(g)) has occurred and is continuing, the Administrative Agent shall, at the request of, or may, with the consent of the Required Lenders (1) declare all of the Term Loans to be due and payable, whereupon the Term Loans, together with interest accrued thereon and all other amounts due under this Agreement and the Notes, shall immediately mature and become due and payable, without presentment, demand, diligence, protest, notice of acceleration, or other notice of any kind, all of which the Borrower hereby expressly waives; and/or (2) exercise on behalf of itself and the Lenders all other rights and remedies available to it and the Lenders under this Agreement and the other Financing Documents. Upon the occurrence of any Event of Default, the Lenders and the Agent shall have, in addition to any other rights and remedies contained in this Agreement and the other Financing Documents, all of the rights and remedies of a secured party under the laws of Argentina or other Applicable Laws, all of which rights and remedies shall be cumulative and non-exclusive, to the extent permitted by Applicable Law.

(b) Bankruptcy. Upon the occurrence of an Event of Default referred to in Section 10.1(g) of this Agreement:

(1) the obligations of the Lenders shall immediately terminate;

(2) the Term Loans, together with all interest accrued thereon and all other amounts due under this Agreement and the Notes, shall immediately mature and become due and payable, without any other presentment, demand, diligence, protest, notice of acceleration, or other notice of any kind, all of which each of the Borrower hereby expressly waives; and

(3) the Administrative Agent may, or at the request of the Required Lenders shall, exercise on behalf of itself and the Lenders all other rights and remedies available to it and the Lenders under this Agreement and the other Financing Documents.

(c) Actions. In connection with the foregoing remedies, the Borrower shall take such further actions and execute all such instruments as the Administrative Agent deems necessary. The Borrower agrees that the Administrative Agent may enforce any obligation of the Borrower as set forth in this Agreement by an action for specific performance.

(d) Advances. The Lenders may (but shall not be obligated to) make advances from their own funds to pay Taxes, insurance and the like, and all such advances shall become part of the Obligations and shall be repayable to the Lenders with interest thereon from the date of such advances until paid at the Default Interest Rate.

(e) Claimed Amount. Notwithstanding anything to the contrary contained in this Agreement or in any of the other Financing Documents, upon the occurrence of any Event of Default, the rights and remedies of the Lenders hereunder with respect to the collection and receipt of the unpaid principal balance of the Term Loans and the Notes shall be limited to the product of the then outstanding principal amount multiplied by the percentage shown on the Schedule of Claimed Amounts attached hereto as Exhibit E (the “Claimed Amount Schedule”).

Section 10.3. Cumulative Rights.

No failure or delay on the part of the Lenders or the Administrative Agent in exercising any right, power, or remedy accruing to them hereunder shall impair any such right, power, or remedy, nor shall such failure or delay in exercising any right, power, or remedy with respect to any particular occurrence of an Event of Default be construed as a waiver of any such right, power, or remedy for any other or future occurrence of an Event of Default, nor shall any single or partial exercise of any such right or power preclude any other or further exercise thereof or the exercise of any other right or power hereunder. To the fullest extent permitted by Applicable Law, all remedies, either under this Agreement or by Applicable Law otherwise afforded the Lenders, shall be cumulative and not alternative.

SECTION 11. EXPENSES AND INDEMNIFICATION

Section 11.1. Expenses.

The Borrower agrees to pay on demand (a) all reasonable and documented costs and expenses of the Administrative Agent in connection with the preparation, execution, delivery, administration, modification, amendment, protocolization and registration of the Financing Documents, including the reasonable fees and expenses of counsel for the Agent with respect thereto, with respect to advising the Agent as to its rights and responsibilities or the perfection, protection or preservation of its and the Lenders’ rights or interests under the Financing Documents, with respect to negotiations with the Borrower, IMPSAT or with other creditors of the Borrower or IMPSAT arising out of any Default or any events or circumstances that may give rise to an Event of Default, and with respect to presenting claims in or otherwise

participating in or monitoring any bankruptcy, insolvency or other similar proceeding involving creditors’ rights generally and any proceeding ancillary thereto, and (b) all reasonable costs and expenses of the Agent and the Lenders in connection with the enforcement of the Financing Documents, including in any action, suit or litigation, any bankruptcy, insolvency or other similar proceeding affecting creditors’ rights (including, without limitation, the reasonable fees and expenses of counsel for the Agent and the Lenders with respect thereto).

Section 11.2. Indemnification.

Without regard to whether the Borrower or any other Person has disclosed any fact to Nortel, the Administrative Agent or any Lender, the Borrower hereby agrees to indemnify and hold harmless each of the Agent and Lenders and each of their respective officers, directors, employees, consultants and advisors (collectively, the “Indemnitees”) from and against any and all actions, suits, claims, damages, demands, judgments, losses, liabilities, costs or expenses whatsoever, including reasonable attorneys’ fees, which any Indemnitee may sustain or incur (or which may be claimed against any Indemnitee by any Person whatsoever) to the extent arising by reason of or in connection with:

(a) the Term Loans or the proposed use of the proceeds thereof;

(b) the payment or failure to pay the Obligations;

(d) the pursuit by the Agent or any Lender of any legal remedy in connection with an Event of Default;

(e) the entering into any Financing Document by Agent or any Lender, or enforcing their remedies hereunder or thereunder; or

(f) any Environmental Law as a result of the past, present or future operations of the Borrower any of its Subsidiaries or IMPSAT (or any predecessor in interest to any such Persons);

provided, however, that, the Borrower shall not be required to indemnify any Indemnitee for any actions, suits, claims, damages, demands, judgments, losses, liabilities, costs or expenses to the extent caused by such Indemnitee’s willful misconduct or gross negligence.

SECTION 12. ASSIGNMENT AND PARTICIPATION

Section 12.1. Assignment.

(a) Requirements. Each Lender may assign to one or more Eligible Assignees all or any portion of its rights and obligations under this Agreement (including, without limitation, the Term Loans owing to it and the Note or Notes held by it); provided, however, that (1) each such assignment shall be of a uniform, and not a varying, percentage of all rights and obligations under and in respect of this Agreement; (2) except in the case of an assignment to a Person that,

immediately prior to such assignment, was a Lender or an assignment of all of a Lender’s rights and obligations under this Agreement, the amount of any Term Loan proposed to be assigned (determined as of the date of the Assignment and Assumption Agreement with respect to such assignment) shall in no event be less than Five Hundred Thousand Dollars (US$500,000); (3) the parties to each such assignment shall execute and deliver an Assignment and Assumption Agreement and (4) with respect to any such Eligible Assignee that is not (a) a Lender; (b) a commercial bank or savings and loan association or savings bank organized under the laws of the United States of America (or any State thereof) or Canada (or any Province thereof), and having total assets in excess of one hundred million Dollars (US$100,000,000); (c) a commercial bank organized under the laws of any other country that is a member of the Basel Accord and the Organization of Economic Cooperation and Development or has concluded special lending arrangements with the International Monetary Fund associated with its general arrangements to borrow, or a political subdivision of any such country, and having total assets in excess of one hundred million Dollars (US$100,000,000), so long as such bank is acting through a branch or agency located in a country in which it is organized or another country that is described in this clause (c); or (d) a finance company, insurance company or other financial institution or fund (whether a corporation, partnership, trust or other entity) that is principally engaged in making, purchasing or otherwise investing in commercial loans in the ordinary course of its business and having total assets in excess of one hundred million Dollars (US$100,000,000); and for which the effective tax rate of any Taxes, other than Excluded Taxes, required by Applicable Law to be withheld or deducted from or in respect of any sum payable to such Eligible Assignee under this Agreement or any other Financing Document shall exceed a rate of 15.05%, the obligation of the Borrower in respect of Section 5.1(a) shall be limited to the amount that would have been otherwise payable if such effective tax rate was 15.05%.

(b) Notice. Promptly following an assignment described in (a) above, the parties to such assignment shall deliver the executed Assignment and Assumption Agreement entered into between the assignor Lender and the assignee to the Administrative Agent for its acknowledgment and recording in the Register together with a non-refundable processing and recordation fee of three thousand five hundred Dollars (US$3,500). The assigning Lender shall also deliver a notice to the Borrower in respect of such assignment (unless such notice has already been given) and the assignee shall furnish the Administrative Agent with a completed administrative details questionnaire.

(c) Recording.Upon its receipt of an Assignment and Assumption Agreement executed by the assignor Lender and the assignee, the Administrative Agent shall promptly acknowledge such Assignment and Assumption Agreement and record the information contained therein in the Register in accordance with the provisions of Section 2.1(c) and give notice of such acknowledgment and recordation to the Lenders and the Borrower. Any assignment of any Term Loan or Note hereunder shall become effective on the day when the relevant Assignment and Assumption Agreement is recorded by the Administrative Agent in the Register.

(d) Exchange of Notes. Concurrently with the delivery of an Assignment and Assumption Agreement to the Administrative Agent pursuant to (c) above, or as soon thereafter as practicable, the assignor Lender shall surrender the Note evidencing the Term Loan being

assigned thereunder for cancellation against delivery to the assignor Lender and/or the assignee of one or more new Notes executed by the Borrower in the same aggregate principal amount.

(e) Release. From and after the date on which an Assignment and Assumption Agreement is effective and solely to the extent of such assignment, the assignor Lender shall be released of its commitments and obligations under this Agreement and the assignee shall thereupon become a Party and shall have the same rights and interest and assume the same obligations and liabilities as having been assigned to it by the assignor Lender.

Section 12.2. Participation.

Any Lender may sell participations to any Person in or to all or a portion of its rights and obligations under this Agreement (including, without limitation, all or a portion of the Term Loans owing to it and the Note or Notes held by it), provided, however, that (a) such Lender’s obligations under this Agreement shall remain unchanged, (b) such Lender shall remain solely responsible to the other Parties for the performance of such obligations, (c) such Lender shall remain the holder of any such Note for all purposes of this Agreement, and (d) the Borrower, the Agent and the other Lenders shall continue to deal solely and directly with such Lender in connection with such Lender’s rights and obligations under this Agreement.

Section 12.3. Information.

Any Lender may, in connection with any assignment or participation or proposed assignment or participation pursuant to this Section 12, disclose to the assignee or participant or proposed assignee or participant, any information relating to the Borrower, the Borrower’s Subsidiaries and IMPSAT furnished to such Lender by or on behalf of the such Person; provided that, prior to any such disclosure, the assignee or participant or proposed assignee or participant shall agree to preserve the confidentiality of any confidential information received by it from such Lender.

SECTION 13. INTENTIONALLY OMITTED

SECTION 14. GOVERNING LAW AND JURISDICTION

Section 14.1. Governing Law.

This Agreement and the Notes shall be governed by, and construed in accordance with, the laws of the State of New York (not including such state’s conflict of laws provisions).

Section 14.2. Waiver of Jury Trial.

Each of the Lenders, the Agent and the Borrower hereby knowingly, voluntarily, and intentionally waives any right it may have to a trial by jury of any claim, demand, or cause of

action under, or in connection with, this Agreement, the Notes or any other financing document. This provision is a material inducement for the Lenders to enter into this Agreement and the other financing documents.

Section 14.3. Jurisdiction; Venue for Suit.

Each of the Borrower, the Lenders and the Agent hereby expressly and irrevocably (a) waives all right to object to jurisdiction or execution in any legal action or proceeding relating to this Agreement, the Notes, or any other Financing Document which such Person may now or hereafter have by reason of such Person’s domicile or by reason of any subsequent or other domicile and hereby irrevocably consents that any legal action, suit, or proceeding arising out of, or relating to, any of the Financing Documents and any other document or instrument required to be executed in relation thereto may be instituted in or removed to the United States District Court of the Southern District of New York and the courts of the State of New York sitting in New York, Borough of Manhattan; (b) submits to and accepts and consents with regard to any such action or proceeding for itself and in respect of its properties and assets, generally and unconditionally, the non-exclusive jurisdiction of any such court; and (c) waives any objection it may now or hereafter have to the laying of the venue of any such action, suit, or proceeding, and further waives any claim that any such action, suit, or proceeding brought in any of the aforesaid courts has been brought in any inconvenient forum.

Section 14.4. Waiver of Immunity.

To the extent that the Borrower or any of its Subsidiaries or any of their respective assets has, or hereafter may acquire, any right to immunity from suit, set-off, legal proceedings generally, attachment prior to judgment, attachment in aid of execution, or other attachment or execution of judgment on the grounds of sovereignty or otherwise, the Borrower for itself, and its Subsidiaries hereby irrevocably waives such rights to immunity in respect of Obligations. In addition, the Borrower hereby irrevocably waives, to the fullest extent it may effectively do so, the right to demand that the Agent or any Lender post a performance bond or guarantee (excepción de arraigo) in any action or proceeding against the Borrower or its property in Argentina.

Section 14.5. Process Agent.

The Borrower has appointed CT Corporation System with offices at ▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇ and its successors as the Borrower’s designee, appointee, and agent to receive, accept and acknowledge, for and on behalf of the Borrower, service of any and all legal process, summons, notices and documents which may be served in such action, suit or proceeding relating to this Agreement or the Notes or any other Financing Document in the case of the courts of the United States District Court of the Southern District of New York or of the courts of the State of New York sitting in New York, Borough of Manhattan, which service may be made on any such designee, appointee, and agent in accordance with legal procedures prescribed for such courts. So long as the Borrower has any Obligations, the Borrower agrees to take any and all action necessary to continue such designation in full force and effect and should such designee, appointee, and agent become unavailable for this purpose for any reason not

attributable to the Borrower, the Borrower shall forthwith grant a similar special irrevocable power of attorney to a new designee, appointee, and agent with offices in New York, New York, which shall irrevocably agree to act as such, with the powers and for purposes specified in this Section 14.5. The Borrower further irrevocably consents and agrees to service of any and all legal process, summons, notices, and documents out of any of the aforesaid courts in any such action, suit or proceeding relating to this Agreement, the Notes, or any other Financing Document delivered to the Borrower in accordance with this Section 14.5 or to its then designee, appointee, or agent for service. If service is made upon such designee, appointee, and agent, a copy of such process, summons, notice or document shall also be provided to the Borrower, by registered or certified mail, or overnight express air courier, provided that failure to provide such copy to the Borrower shall not impair or affect in any way the validity of such service or any judgment rendered in such action or proceedings. The Borrower agrees that service upon the Borrower or any such designee, appointee, and agent as provided for in this Section 14.5 shall constitute valid and effective personal service upon the Borrower with respect to matters contemplated in this Section 14.5 and that the failure of any such designee, appointee, and agent to give any notice of such service to the Borrower shall not impair or affect in any way the validity of such service or any judgment rendered in any action or proceeding based thereon. Nothing herein shall limit or be construed to limit the rights of the Lenders to commence proceedings against the Borrower in any other venue where assets of the Borrower may be found.

Section 14.6. Legal Process in Other Jurisdictions.

Nothing in Section 14.3 or in Section 14.5 shall affect the right of any Lender or the Agent to serve legal process in any other manner permitted by law or affect the right of any Lender or the Administrative Agent to bring any action or proceeding against the Borrower or its property in the courts of other competent jurisdictions, including, without limitation, the courts sitting in the City of Buenos Aires, Argentina.

SECTION 15. THE ADMINISTRATIVE AGENT

Section 15.1. Authorization and Action.

The Lenders hereby appoint and authorize the Administrative Agent to exercise such powers and discretion under this Agreement and the other Financing Documents, as are delegated to them, respectively, by the terms hereof and thereof, together with such powers and discretion as are reasonably incidental thereto. As to any matters not expressly provided for in the Financing Documents (including, without limitation, enforcement or collection of the Notes), the Agent shall not be required to exercise any discretion or take any action, but shall be required to act or to refrain from acting (and shall be fully protected in so acting or refraining from acting) upon the instructions of the Required Lenders; provided, however, that the Agent shall not be required to take any action that exposes it to personal liability or that is contrary to this Agreement or Applicable Law. The Agent hereunder agrees to give to the Lenders prompt notice of each notice given to it by the Borrower pursuant to the terms of this Agreement.

Section 15.2. Agent’s Reliance.

Neither the Agent nor any of its directors, officers, agents or employees shall be liable for any action taken or omitted to be taken by it or them under or in connection with the Financing Documents, except for its or their own gross negligence or willful misconduct. Without limitation of the generality of the foregoing, the Agent: (a) may treat the payee of any Note as the holder thereof until the Administrative Agent receives and accepts an Assignment and Assumption Agreement entered into by the payee of such Note, as assignor, and an Eligible Assignee; (b) may consult with legal counsel (including counsel for the Borrower), independent public accountants and other experts selected by it and shall not be liable for any action taken or omitted to be taken in good faith by it in accordance with the advice of such counsel, accountants or experts; (c) make no warranty or representation to the Lenders and shall not be responsible to any Lender for any statements, warranties or representations (whether written or oral) made in or in connection with this Agreement; (d) shall not have any duty to ascertain or to inquire as to the performance or observance of any of the terms, covenants or conditions of this Agreement on the part of the Borrower or to inspect the property (including the books and records) of the Borrower; and (e) shall incur no liability under or in respect of this Agreement by acting upon any notice, consent, certificate or other instrument or writing (which may be by facsimile, electronic mail or telex) believed by it to be genuine and signed or sent by the proper party or parties.

Section 15.3. Lender Credit Decision.

Each Lender acknowledges that it has, independently and without reliance upon the Agent and based on the financial statements referred to in Section 7.7 of this Agreement and such other documents and information as it has deemed appropriate, made its own credit analysis and decision to enter into this Agreement. Each Lender also acknowledges that it will, independently and without reliance upon any Agent and based on such documents and information as it shall deem appropriate at the time, continue to make its own credit decisions in taking or not taking action under this Agreement.

Section 15.4. Lender Indemnification.

The Lenders agree to indemnify the Agent ratably according to the respective principal amount of the Notes then held by the Lenders from and against any and all liabilities, obligations, losses, damages, penalties, actions, judgments, suits, costs, expenses or disbursements of any kind or nature whatsoever that may be imposed on, incurred by, or asserted against the Agent in any way relating to or arising out of this Agreement, the Existing Argentine Financing Agreement or any of the other Financing Documents or any action taken or omitted by the Agent under this Agreement, the Existing Argentine Financing Agreement or any of the other Financing Documents (to the extent not promptly reimbursed by the Borrower); provided, however, that the Lenders shall not be liable for any portion of such liabilities, obligations, losses, damages, penalties, actions, judgments, suits, costs, expenses or disbursements resulting from the Agent’s gross negligence or willful misconduct. Without limitation of the foregoing, the Lenders agree to reimburse the Agent promptly upon demand for its ratable share of any costs and expenses (including, without limitation, fees and expenses of counsel) payable by the

Borrower under Sections 11.1 and 11.2, to the extent that the Agent is not promptly reimbursed for such costs and expenses by the Borrower.

Section 15.5. Successor Agents.

The Agent may resign at any time by giving written notice thereof to the Lenders and the Borrower and may be removed at any time with or without cause by the Required Lenders. Upon any such resignation or removal, the Required Lenders shall have the right to appoint a successor Agent. If no successor Agent shall have been so appointed, and shall have accepted such appointment, within thirty (30) days after the retiring Agent’s giving of notice of resignation or the Required Lenders’ removal of the retiring Agent, then the retiring Agent may, on behalf of the Lenders, appoint a successor Agent, which shall be a commercial bank organized under the laws of the United States or of any State thereof and having a combined capital and surplus of at least one hundred million Dollars (US$100,000,000). Upon the acceptance of any appointment as an Agent hereunder by a successor Agent, such successor Agent shall succeed to and become vested with all the rights, powers, discretion, privileges and duties of the retiring Agent, and the retiring Agent shall be discharged from its duties and obligations under this Agreement. After any retiring Agent’s resignation or removal hereunder as an Agent, the provisions of this Section 15 shall inure to its benefit as to any actions taken or omitted to be taken by it while it was an Agent under this Agreement.

SECTION 16. GENERAL PROVISIONS

Section 16.1. Notices.

All communications and notices provided for hereunder shall be in writing and shall be personally delivered, mailed by postage prepaid registered mail (airmail if international), return receipt requested, or telefaxed (with a confirmation copy by postage prepaid registered mail, return receipt requested):


If to the Borrower:		IMPSAT ▇.▇. ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇ (▇▇▇▇) ▇▇▇▇▇▇ ▇▇▇▇▇, ▇▇▇▇▇▇▇▇▇ Attention: President Fax No.: ▇▇ ▇▇ ▇▇▇▇ ▇▇▇▇

If to IMPSAT		IMPSAT Fiber Networks, Inc. c/o IMPSAT USA, Inc. ▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇▇▇ ▇▇▇▇▇ Attention: President Fax No.: (▇▇▇) ▇▇▇-▇▇▇▇

If to the Lenders:		Nortel Networks Limited c/o Nortel (CALA) Inc. ▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇

▇▇


		▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇-▇▇▇▇ Attention: Vice President and General Counsel

With a copy to:		▇▇▇▇▇ ▇▇▇▇▇▇▇ LLP ▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇.▇. ▇▇▇▇▇▇▇▇▇▇, ▇.▇. ▇▇▇▇▇ Attention: ▇▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇, Esq. Fax No.: (▇▇▇)▇▇▇-▇▇▇▇

If to the Administrative Agent:		Nortel Networks Limited c/o Nortel (CALA) Inc. ▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇-▇▇▇▇ Attention: Vice President and General Counsel Fax No.: (▇▇▇) ▇▇▇-▇▇▇▇

Except as otherwise specified herein, all notices shall be deemed duly given on the date of actual receipt.

Section 16.2. Severability of Provisions.

If any one or more of the provisions contained in this Agreement or any documents executed in connection herewith shall be invalid, illegal, or unenforceable in any respect, the validity, legality, and enforceability of the remaining provisions contained herein shall not in any way be affected or impaired.

Section 16.3. Binding Effect; Successors and Assigns.

This Agreement shall be binding upon and shall inure to the benefit of each Party and its respective successors and assigns, provided that the Borrower shall not assign or transfer any of its rights or Obligations hereunder except with the prior written consent of the Administrative Agent and each Lender.

Section 16.4. Amendment; Waiver.

Neither this Agreement nor any Financing Document may be amended, waived, discharged, or terminated unless such change, waiver, discharge, or termination is in writing signed by the Required Lenders, the Administrative Agent and the Borrower, provided, however, that no such change, waiver, discharge or termination shall, without the consent of each Lender affected thereby, (a) extend the final maturity of any Loan or Note, or reduce the rate or extend the time of payment of interest or fees thereon, or reduce the principal amount hereof, (b) amend, modify or waive any provision of this Section 16.4 or Sections 3, 4, 5, 11, 12, 15.4 and 16.6, (c) reduce the percentages specified in the definition of Required Lenders, or (d) consent to the assignment of any of the rights and Obligations of the Borrower under this Agreement. The failure of any party to enforce at any time any provision hereof or under any of the Notes shall

not be construed to be a waiver of such provisions or of the right of such party thereafter to enforce any such provision or any other provision hereof or thereof.

Section 16.5. Entire Agreement.

This Agreement and the other Financing Documents constitute the entire agreement and understanding of the Parties with respect to the subject matter hereof, and supersede all prior agreements, discussions, and understandings between the Lenders and the Borrower with respect to the subject matter hereof.

Section 16.6. No Novation.

The obligations contained in this Agreement do not constitute a novation of the obligations set forth in the Nortel Contracts.

Section 16.7. Right of Set-Off.

The Borrower’s Obligations shall be paid in full in accordance with their respective terms, and may not be offset against any obligations that Nortel, any Lender, or any of their respective Affiliates may owe to the Borrower under any other agreement, including (without limitation) the Project Agreements. Each of the Lenders shall, to the fullest extent permitted by Applicable Law, have the right to apply any and all amounts on deposit or on account (general or special, time or demand, matured or unmatured, in whatever currency) with it or with any of its branches, Subsidiaries, or Affiliates in reduction of past due Obligations (whether such Obligations became due at scheduled maturity, by acceleration or otherwise) of the Borrower hereunder.

Section 16.8. Release and Waiver.

The Borrower hereby releases the Lenders and the Agent and their officers, attorneys, agents, and employees from any liability, suit, damage, claim, loss or expense of any kind or nature whether known or unknown, at law or in equity, whatsoever and howsoever arising up to and including the date hereof that the Borrower or any of its Subsidiaries ever had or now has against any of them arising out of or relating to any Lender’s or the Agent’s acts or omissions with respect to the Nortel Contracts, the Project Agreements or any other matters described or referred to herein or therein. Without limiting the generality of the foregoing release, the Borrower hereby acknowledges, confirms and agrees that it has no offsets, defenses or counterclaims against any of the Lenders or the Agent with respect to any of the Obligations or other obligations due and owing to any of the Lenders or the Agent (including, without limitation, those arising under, pursuant to, or in connection with, the Nortel Contracts and related documents), and to the extent that the Borrower has or had any such offsets, defenses or counterclaims, Borrower hereby specifically waives any and all rights to such offsets, defenses and counterclaims and releases the Lenders, the Agent and their officers, attorneys, agents, and employees from any liability arising on account thereof.

Section 16.9. Further Assurances.

The Borrower agrees upon the reasonable request of the Agent or Lender promptly to take such actions as are necessary to carry out the intent of this Agreement and the other Financing Documents.

Section 16.10. Term of Agreement; Survival.

Each agreement, representation, warranty, and covenant contained in this Agreement shall survive any investigation made at any time by or on behalf of the Lenders. This Agreement shall continue to be in full force and effect and binding upon the Parties until all of the Borrower’s Obligations have been fully and indefeasibly paid and performed, whereupon this Agreement shall terminate. Notwithstanding the foregoing, all the indemnification provisions in this Agreement shall survive and all other provisions which by their terms survive termination shall so survive.

Section 16.11. Headings.

The various headings in this Agreement are intended for convenience only, and shall not affect the meaning or interpretation of this Agreement.

Section 16.12. Counterparts.

This Agreement may be executed in any number of counterparts (including facsimile transmissions thereof), each of which when so executed shall be an original but all of which together shall constitute one instrument.

Section 16.13. Confidentiality.

Each of the Parties hereby agrees to maintain the confidentiality of the Information (as defined below), except that Information may be disclosed (a) to its Affiliates, directors, officers, employees and professional advisors, including accountants, legal counsel and other advisors (it being understood that the Persons to whom such disclosure is made will be informed of and will agree to be bound by this confidentiality provision), (b) to the extent requested by any regulatory authority, (c) to the extent required by Applicable Law including in connection with a public offering of equity or debt securities of the Borrower or IMPSAT or by any subpoena or similar legal process, (d) to any other party to this Agreement, (e) in connection with the exercise of any remedies hereunder or any suit, action or proceeding relating to this Agreement or the enforcement of rights hereunder, (f) subject to the execution and delivery of an agreement containing provisions substantially the same as those of this Section 16.13, to any assignee of or participant in, or any prospective assignee of or participant in, any of its rights or obligations under this Agreement, (g) with the consent of the other Parties, or (h) to the extent such Information (1) becomes publicly available other than as a result of a breach of this Section 16.13 or (2) becomes available to such party on a non-confidential basis from a source other than the other Parties.

For the purposes of this Section 16.13, “Information” means all information received from any of the Parties relating to any of the Lenders, Lucent Argentina or their respective businesses, other than any such information that is available to the Parties on a non-confidential basis prior to disclosure by any Party. Any Person required to maintain the confidentiality of Information as provided in this Section 16.13 shall be considered to have complied with its obligation to do so if such Person has exercised the same degree of care to maintain the confidentiality of such Information as such Person would accord to its own confidential Information.

Section 16.14. Cooperation.

The Borrower will cooperate with Nortel, the Administrative Agent, if applicable, and the lead agents for syndication (such lead agents and the Administrative Agent being referred to collectively as the “Syndication Agents”) in the syndication of the Term Loans undertaken by the Syndication Agents by: (a) upon reasonable notice making senior officers of the Borrower available for a meeting with prospective assignees and the Syndication Agents and their respective consultants; and (b) providing such other assistance as may be reasonably requested by the Syndication Agents, such as responding to questions from prospective assignees with respect to the operations, business plans, results and other matters relating to the Borrower, its Affiliates and IMPSAT.

[Signatures on following pages]

In Witness Whereof, the Parties have caused this Agreement to be duly executed as of the date first written above.

BORROWER:

IMPSAT S.A.


By:		/s/ ▇▇▇▇▇▇ ▇▇▇▇▇▇

Name:

Its:



By:		/s/ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇

Name:

Its:

LENDERS:

NORTEL NETWORKS LIMITED


By:		/s/ ▇▇▇▇▇ ▇. ▇▇▇▇▇▇

Name:		▇▇▇▇▇ ▇. ▇▇▇▇▇▇

Its:		Attorney-in-Fact

ADMINISTRATIVE AGENT:

NORTEL NETWORKS LIMITED


By:		/s/ ▇▇▇▇▇ ▇. ▇▇▇▇▇▇

Name:		▇▇▇▇▇ ▇. ▇▇▇▇▇▇

Its:		Attorney-in-Fact


SCHEDULES

1.1		Existing Indebtedness
1.1(a)		Existing Investments
2.2		Term Loan Commitment
7.1(a)		Subsidiaries
7.1(b)		Assumed Names/Trade Names
7.5		Proceedings
7.10		Transactions with Affiliates
7.11		Indebtedness
7.12(a)		Existing Liens
7.13		Intellectual Property
7.15		Licenses
10.1(f)		“Section 10.1(f)” Existing Indebtedness



EXHIBITS

A		Form of Assignment and Assumption Agreement
B		INTENTIONALLY OMITTED
C		Form of Intercompany Subordination Agreement
D		Form of Note
E		Claimed Amounts
F		Form of Exchange Agreement
G		Form of Exchange Assignment Agreement
H		Form of Warrant Agreement

US$10,287,919 ACCOUNTS PAYABLE FINANCING AGREEMENT dated as of March 25, 2003, by and among IMPSAT S.A. as Borrower, NORTEL NETWORKS LIMITED, as Administrative Agent, and The Lenders Party Hereto From Time to Time as Lenders

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