Document:

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                             $75,000,000
               REVOLVING CREDIT AND SECURITY AGREEMENT

                    Dated as of January 22, 2002

                              Between

                            MASTEC, INC.
                    CERTAIN OF ITS SUBSIDIARIES
                         (the Borrowers)

                               and

                THE FINANCIAL INSTITUTIONS PARTY
                    HERETO FROM TIME TO TIME
                         (the Lenders)

                               and

                   FLEET CAPITAL CORPORATION
                   (the Administrative Agent)

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                          Arranged by:

                     FLEET SECURITIES, INC.

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                           TABLE OF CONTENTS(1)

                                                                          Page
ARTICLE 1	DEFINITIONS                                                 1
Section 1.1	Definitions                                                 1
Section 1.2	General Interpretive Rules.                                30
Section 1.3	Exhibits and Schedules                                     32

ARTICLE 2	REVOLVING CREDIT FACILITY                                  33
Section 2.1	Revolving Credit Loans                                     33
Section 2.2	Manner of Borrowing                                        33
Section 2.3	Repayment; Prepayment                                      35
Section 2.4	Notes                                                      36
Section 2.5	Reduction and Increase of Commitments.                     36

ARTICLE 2A	SWINGLINE FACILITY                                         39
Section 2A.1	Swingline Loans                                            39
Section 2A.2	Making Swingline Loans                                     39
Section 2A.3	Repayment of Swingline Loans                               39
Section 2A.4	Prepayment                                                 39
Section 2A.5	Swingline Note                                             40
Section 2A.6	Settlement with Other Lenders                              40

ARTICLE 3	LETTER OF CREDIT GUARANTEES                                41
Section 3.1	Agreement to Issue                                         41
Section 3.2	Amounts                                                    41
Section 3.3	Conditions                                                 41
Section 3.4	Issuance of Letter of Credit Guarantees.                   41
Section 3.5	Duties of FCC                                              42
Section 3.6	Payment of Reimbursement Obligations.                      43
Section 3.7	Participations.                                            43
Section 3.8	Indemnification, Exoneration.                              45
Section 3.9	Supporting Letter of Credit; Cash Collateral Account       46

ARTICLE 4	GENERAL LOAN PROVISIONS                                    48
Section 4.1	Interest.                                                  48
Section 4.2	Certain Fees.                                              49
Section 4.3	Manner of Payment.                                         50
Section 4.4	General                                                    51
Section 4.5	Loan Accounts; Statements of Account.                      51
Section 4.6	Termination of Agreement                                   51
Section 4.7	Making of Loans.                                           52
Section 4.8	Settlement Among Lenders.                                  53
Section 4.9	Mandatory Prepayments                                      54
Section 4.10	Payments Not at End of Interest Period; Failure to Borrow  54
Section 4.11	Notice of Conversion or Continuation                       55
Section 4.12	Conversion or Continuation                                 55
Section 4.13	Duration of Interest Periods; Maximum Number of LIBOR
                  Loans; Minimum Increments.                               55
Section 4.14	Changed Circumstances.                                     56
Section 4.15	Increased Capital                                          57
Section 4.16	Net Payments.                                              57
Section 4.17	Cash Collateral Account; Investment Accounts.              60
Section 4.18	Allocation of Payments from Borrowers                      61
Section 4.19	Borrowers' Representative                                  62
Section 4.20	Joint and Several Liability.                               62
Section 4.21	Obligations Absolute                                       63
Section 4.22	Waiver of Suretyship Defenses                              63

ARTICLE 5	CONDITIONS PRECEDENT                                       65
Section 5.1	Conditions Precedent to Initial Loans                      65
Section 5.2	All Loans; Letters of Credit                               68
Section 5.3	Mortgages; Title Certificates.                             69
Section 5.4	Conditions as Covenants                                    69

ARTICLE 6	REPRESENTATIONS AND WARRANTIES OF BORROWERS                71
Section 6.1	Representations and Warranties                             71
Section 6.2	Survival of Representations and Warranties, Etc            79

ARTICLE 7	SECURITY INTEREST                                          80
Section 7.1	Security Interest.                                         80
Section 7.2	Continued Priority of Security Interest.                   80

ARTICLE 8	COLLATERAL COVENANTS                                       82
Section 8.1	Collection of Accounts.                                    82
Section 8.2	Verification and Notification                              83
Section 8.3	Disputes, Returns and Adjustments.                         83
Section 8.4	Invoices.                                                  84
Section 8.5	Delivery of Instruments                                    84
Section 8.6	Sales of Inventory                                         84
Section 8.7	Ownership and Defense of Title.                            84
Section 8.8	Insurance.                                                 85
Section 8.9	Location of Offices and Collateral.                        86
Section 8.10	Records Relating to Collateral                             86
Section 8.11	Inspection                                                 86
Section 8.12	Information and Reports.                                   87
Section 8.13	Power of Attorney                                          88
Section 8.14	Assignment of Claims Act                                   88

ARTICLE 9	AFFIRMATIVE COVENANTS                                      89
Section 9.1	Preservation of Corporate Existence and Similar Matters    89
Section 9.2	Compliance with Applicable Law                             89
Section 9.3	Maintenance of Property                                    89
Section 9.4	Conduct of Business                                        89
Section 9.5	Insurance                                                  89
Section 9.6	Payment of Taxes and Claims                                90
Section 9.7	Accounting Methods and Financial Records                   90
Section 9.8	Use of Proceeds.                                           90
Section 9.9	Hazardous Waste and Substances; Environmental Requirements 90
Section 9.10	Additional Subsidiaries                                    91
Section 9.11	Compliance with Indenture                                  91

ARTICLE 10	INFORMATION                                                92
Section 10.1	Financial Statements.                                      92
Section 10.2	Accountants' Certificate                                   93
Section 10.3	Officer's Certificate                                      93
Section 10.4	Copies of Other Reports                                    93
Section 10.5	Notice of Litigation and Other Matters                     94
Section 10.6	ERISA                                                      94

ARTICLE 11	NEGATIVE COVENANTS                                         96
Section 11.1	Financial Covenants.                                       96
Section 11.2	Debt                                                       96
Section 11.3	Guarantees                                                 96
Section 11.4	Investments and Acquisitions                               96
Section 11.5	Capital Expenditures                                       99
Section 11.6	Restricted Distributions and Payments, Etc                 99
Section 11.7	Merger, Consolidation and Sale of Assets                   99
Section 11.8	Transactions with Affiliates                               99
Section 11.9	Liens                                                      99
Section 11.10	Sales and Leasebacks                                       99
Section 11.11	Amendments of Other Agreements                            100

ARTICLE 12	DEFAULT                                                   101
Section 12.1	Events of Default                                         101
Section 12.2	Remedies                                                  104
Section 12.3	Application of Proceeds                                   106
Section 12.4	Power of Attorney                                         106
Section 12.5	Miscellaneous Provisions Concerning Remedies.             107
Section 12.6	Trademark License                                         108

ARTICLE 13	ASSIGNMENTS                                               109
Section 13.1	Successors and Assigns; Participations                    109
Section 13.2	Representation of Lenders                                 111

ARTICLE 14	AGENT                                                     112
Section 14.1	Appointment of Administrative Agent                       112
Section 14.2	Delegation of Duties                                      112
Section 14.3	Exculpatory Provisions                                    112
Section 14.4	Reliance by Administrative Agent                          113
Section 14.5	Notice of Default                                         113
Section 14.6	Non-Reliance on Administrative Agent and Other Lenders    113
Section 14.7	Indemnification.                                          114
Section 14.8	Administrative Agent in Its Individual Capacity           115
Section 14.9	Successor Administrative Agent.                           115
Section 14.10	Notices from Administrative Agent to Lenders              116
Section 14.11	Declaring Events of Default                               117

ARTICLE 15	MISCELLANEOUS                                             118
Section 15.1	Notices.                                                  118
Section 15.2	Expenses                                                  119
Section 15.3	Stamp and Other Taxes                                     121
Section 15.4	Setoff                                                    121
Section 15.5	Consent to Advertising and Publicity                      121
Section 15.6	Reversal of Payments                                      121
Section 15.7	Injunctive Relief                                         122
Section 15.8	Accounting Matters                                        122
Section 15.9	Amendments.                                               122
Section 15.10	Confidentiality                                           123
Section 15.11	Performance of Borrowers' Duties.                         124
Section 15.12	Indemnification                                           124
Section 15.13	All Powers Coupled with Interest                          124
Section 15.14	Survival                                                  124
Section 15.15	Titles and Captions                                       125
Section 15.16	Severability of Provisions                                125
Section 15.17	Governing Law; Waiver of Jury Trial.                      125
Section 15.18	Counterparts                                              126
Section 15.19	Reproduction of Documents                                 126
Section 15.20	Term of Agreement                                         126
Section 15.21	Pro-Rata Participation                                    126

ANNEX A	        COMMITMENTS
ANNEX B	        PRICING MATRIX
ANNEX C	        BORROWERS
ANNEX D	        REAL PROPERTY TO BE SUBJECT TO MORTGAGES
ANNEX E	        TRANSFER INSTRUCTIONS FOR ADMINISTRATIVE AGENT
ANNEX F	        APPROVED ACCOUNT DEBTORS
ANNEX G	        EBITDA ADJUSTMENT AMOUNTS
ANNEX H	        CANADIAN PRIMING LIENS
ANNEX I	        SCHEDULE OF FIXED ASSET AVAILABILITY REDUCTIONS

EXHIBIT A-1	FORM OF REVOLVING CREDIT NOTE
EXHIBIT A-2	FORM OF SWINGLINE NOTE
EXHIBIT B	FORM OF BORROWING BASE CERTIFICATE
EXHIBIT C	FORM OF ASSIGNMENT AND ACCEPTANCE
EXHIBIT D	FORM OF COMPLIANCE CERTIFICATE
EXHIBIT E	FORM OF SUBSIDIARY GUARANTY
EXHIBIT F	FORM OF SUBSIDIARY SECURITY AGREEMENT
Schedule 1.1A	Permitted Investments
Schedule 1.1B	Permitted Liens
Schedule 1.1C	Clearing Banks
Schedule 6.1(a)	Jurisdictions in Which Borrowers are Qualified as Foreign
                    Corporations
Schedule 6.1(b)	Capitalization
Schedule 6.1(c)	Subsidiaries; Ownership of Stock
Schedule 6.1(e)	Compliance with Laws
Schedule 6.1(f)	Business of Borrowers
Schedule 6.1(g)	Governmental Approvals
Schedule 6.1(h)	Title to Properties
Schedule 6.1(i)	Liens
Schedule 6.1(j)	Indebtedness and Guarantees
Schedule 6.1(k)	Litigation
Schedule 6.1(l)	Tax Matters
Schedule 6.1(m)	Burdensome Provisions
Schedule 6.1(n)	Undisclosed Material Obligations
Schedule 6.1(p)	ERISA
Schedule 6.1(t)	Location of Offices and Accounts
Schedule 6.1(u)	Location of Inventory and Equipment
Schedule 6.1(v)	Corporate and Fictitious Names
Schedule 6.1(y)	Employee Relations
Schedule 6.1(z)	Proprietary Rights
Schedule 6.1(aa)	Trade Names
Schedule 6.1(bb)	Bank Accounts
Schedule 6.1(dd)	Real Property
Schedule 9.8	Use of Proceeds

                   REVOLVING CREDIT AND SECURITY AGREEMENT

     THIS REVOLVING CREDIT AND SECURITY AGREEMENT is made as of January 22,
2002 by and between MASTEC, INC., a Florida corporation, its subsidiaries
named as "Borrowers" on Annex C hereto, the financial institutions party to
this Agreement from time to time as the Lenders, and FLEET CAPITAL CORPORATION,
as administrative agent for the Lenders.

                         Preliminary Statement

     MasTec, Inc. and Fleet National Bank, among others, are parties to a
Credit Agreement dated as of June 9, 1997 (as amended and in effect, the
"Existing Loan Agreement").  MasTec, Inc. desires to repay in full its
obligations under the Existing Loan Agreement and to terminate the Existing
Loan Agreement and any commitment of Fleet National Bank or any other
lender thereunder.

     Fleet Capital Corporation has agreed with MasTec, Inc. to make available
a revolving credit facility in a principal amount of up to $75,000,000,
secured by substantially all assets of MasTec, Inc. and its subsidiaries
organized under the laws of the United States or any state thereof, a portion
of which may be applied to support a separate Canadian currency facility
for the use of subsidiaries organized under the laws of Canada or any province
thereof, upon and subject to the terms, conditions and provisions hereinafter
set forth.  Accordingly, in consideration of the mutual promises hereinafter
set forth, the commitments and other financial accommodations to be extended
by the Lenders to the Borrowers, and other good and valuable consideration,
the receipt and sufficiency of which are hereby acknowledged, the parties
hereto agree as follows:

                                ARTICLE 1

                               DEFINITIONS

     Section 1.1   Definitions.  For the purposes of this Agreement:

     "Account" has the meaning specified in the definition "Collateral."

     "Account Debtor" means a Person who is obligated on an Account or
General Intangible.

     "ACH Transfer" means and refers to the transfer of funds within or
between financial institutions using electronic credits and debits in
accordance with procedures promulgated by the National Automated Clearing
House Association or any related regional association.

     "Acquisition" means the acquisition of a Business Unit or of the
majority of the equity interests in another Person by purchase, exchange,
issuance of stock or other securities, or by merger, reorganization or any
other method.

     "Additional Lender" has the meaning specified in Section 2.5(b).

     "Additional Reserves" means reserves against the Borrowing Base other
than the Letter of Credit Reserve, the Dilution Reserve or the Availability
Reserve, established by the Administrative Agent from time to time in the
exercise of its reasonable credit judgment.

     "Administrative Agent" means FCC and any successor agent appointed
pursuant to Section 14.9 hereof.

     "Administrative Agent's Office" means the office of the Administrative
Agent specified in or determined in accordance with the provisions of Section
15.1.

     "Affiliate" (and with corollary meaning, "Affiliated") means, with
respect to a Person, (a) any partner, officer, shareholder (if holding more
than 10% of the outstanding shares of capital stock of such Person), member,
director, manager or managing agent of such Person, (b) any spouse, parents,
siblings, or adult children of such Person, and (c) any other Person (other
than a Subsidiary) that, directly or indirectly through one or more
intermediaries, controls, or is controlled by, or is under common control
with, such given Person.  The term "control" means the possession, directly
or indirectly, of the power to direct or cause the direction of the
management and policies of a Person, whether through ownership of voting
securities or partnership or other voting interest, by contract or otherwise.

     "Agreement" means this Revolving Credit and Security Agreement, including
all Schedules, Exhibits and other attachments hereto, and all amendments,
modifications and supplements hereto and thereto and restatements hereof and
thereof.

     "Agreement Date" means the date as of which this Agreement is dated.

     "Applicable Law" means all applicable provisions of constitutions,
statutes, rules, regulations and orders of all governmental bodies and of all
orders and decrees of all courts and arbitrators, including, without
limitation, Environmental Laws.

     "Applicable Margin" means (a) as to Base Rate Loans (including all
Swingline Loans), 1.25% and (b) as to LIBOR Loans, 2.75%, subject to quarterly
adjustment as follows:  From and after the delivery of the financial statements
for the Fiscal Quarter ending June 30, 2002 and the related officer's
certificate in accordance with the respective provisions of Sections 10.1(b)
and 10.3, the foregoing percentages will be adjusted effective October 1, 2002
and as of the first day of each succeeding Fiscal Quarter thereafter, that
begins at least 10 days after delivery of quarterly financial statements and
the related officer's certificate for the previous Fiscal Quarter (each, a
"Margin Adjustment Date"), to the percentages set forth in Annex B that
correspond to the Leverage Ratio reflected in such financial statements and
the related certificate; provided, that if and for so long as a Default or
Event of Default exists, no downward adjustment in the Applicable Margin
otherwise indicated shall be effected.

     "Approved Account Debtor" means at any time, each Account Debtor whose
corporate credit rating or senior debt rating (secured or unsecured), or any
of them, by Moody's or S&P is investment grade (as of the Agreement Date, at
least Baa3 and BBB-, respectively) and other Account Debtors approved in
writing by the Administrative Agent.  If only one such rating agency has
issued an investment grade rating for an Account Debtor and the highest rating
for such Account Debtor by the other rating agency is two levels (or 'ticks')
or more below the highest rating issued by the first such rating agency, such
Account Debtor shall not be an 'Approved Account Debtor' unless approved by
the Administrative Agent.  Approved Account Debtors as of the Agreement Date
are listed on Annex F.

     "Arranger" means FSI in such capacity.

     "Assignment and Acceptance" means an assignment and acceptance in the
form attached hereto as Exhibit C assigning all or a portion of a Lender's
interests, rights and obligations under this Agreement pursuant to Section
13.1.

     "Availability" means at any time the excess, if any, of the Borrowing
Base over the aggregate principal amount of Loans outstanding at such time.
"Availability Reserve" means an amount equal to $10,000,000 or such greater
amount as the Administrative Agent may specify in its reasonable credit
judgment.

     "Bank" means Fleet National Bank, a national banking association.
"Base Rate" means the rate of interest announced or quoted by Bank from time
to time as its prime rate for commercial loans, whether or not such rate is
the lowest rate charged by Bank to its most preferred borrowers, and, if such
prime rate for commercial loans is discontinued by Bank as a standard, a
comparable reference rate designated by Bank as a substitute therefor shall
be the Base Rate.

     "Base Rate Loan" means any Loan bearing interest determined with
reference to the Base Rate.

     "Benefit Plan" means an "employee pension benefit plan" as defined in
Section 3(3) of ERISA (other than a Multiemployer Plan) in respect of which
a Borrower or any Related Company is, or within the immediately preceding
six years was, an "employer" as defined in Section 3(5) of ERISA, including
such plans as may be established after the Agreement Date.

     "Borrower" means each of MasTec and each Subsidiary of MasTec listed as
a "Borrower" on Annex C hereto and each Subsidiary of MasTec that becomes a
"Borrower" after the Effective Date pursuant to Section 9.10.

     "Borrowing" means Loans of the same Type made (or continued or converted)
by the Lenders Ratably on the same date, and, in the case of LIBOR Loans, for
the same Interest Period.

     "Borrowing Base" means at any time an amount equal to the least of:

     (a)  the aggregate Commitments, minus the Letter of Credit Reserve, and
     (b)  an amount equal to
          (i)  85% (or such lesser percentage as the Administrative Agent may
     in its reasonable credit judgment determine from time to time) of the face
     value of Eligible Accounts due and owing at such time, plus

         (ii)  25% (or such lesser percentage as the Administrative Agent
     may in its reasonable credit judgment determine from time to time) of
     Eligible Unbilled Accounts at such time (but in any event not to exceed
     an amount equal to the product of (x) the sum of the amounts derived
     pursuant to subsections (b)(i), (ii) (without regard to the limitation
     set forth in this proviso) and (iii) of this definition, multiplied by
     (y) 15%), plus

        (iii)  $30,000,000 (or, if less, 40% of the aggregate value of the
     Borrowers' Eligible Fixed Assets, on the basis of a sale at public auction
     under forced conditions, as established by an appraisal satisfactory to
     the Administrative Agent), less  the amounts for each period specified on
     Annex I, minus

         (iv)  the sum of

               (A)  the Letter of Credit Reserve, plus
               (B)  the Availability Reserve, plus
               (C)  the Dilution Reserve, plus
               (D)  the Canadian Reserve, plus
               (E)  the Rent Reserve, plus
               (F)  any Additional Reserves, and

     (c)  an amount equal to collections received by the Loan Parties on a
combined basis for the most recent period of 60 days.

     "Borrowing Base Certificate" means a certificate in the form attached
hereto as Exhibit B or in such other form as the Borrowers and the
Administrative Agent may agree.

     "Business Day" means any day other than a Saturday, Sunday or other day
on which banks in Atlanta, Georgia or Hartford, Connecticut are authorized to
close and, when used with respect to LIBOR Loans, means any such day on which
dealings in Dollar deposits are carried on in the London interbank market.

     "Business Unit" means assets constituting a business, whether all of the
assets of any Person or the assets of a division or operating unit of any
Person.

     "C$" and "Canadian Dollars" each means freely transferable Canadian
dollars.

     "Canadian Borrowing Base" means at any time an amount equal to the sum of
(a) an amount equal to 85% (or such lesser percentage as the Administrative
Agent may in its reasonable credit judgment determine from time to time) of the
face value of Eligible Accounts due and owing to the Canadian Entity at such
time, plus 25% (or such lesser percentage as the Administrative Agent may in
its reasonable credit judgment determine from time to time) of Eligible
Unbilled Accounts of the Canadian Entity at such time.  The amounts included
in the computation of the Canadian Borrowing Base shall be expressed in Dollars
and in any case in which an amount is originally denominated in C$ (e.g., the
amount of an Account), shall be the Dollar Equivalent thereof.

     "Canadian Entity" means Phasecom Systems Inc., an Ontario (Canada)
corporation, and Integral Power & Telecommunications Corporation Ltd., a
Canadian corporation, and both Wholly Owned Subsidiaries of MasTec and each
other direct or indirect Wholly Owned Subsidiary organized under the laws of
Canada or any province thereof that becomes a Loan Party, singly or
collectively.

     "Canadian Financing Letter of Credit" means the Letter of Credit issued by
the Bank on or about the Effective Date in an amount available to be drawn of
not more than C$7,500,000 for the account of MasTec and the benefit of the
Canadian Funding Agent.

     "Canadian Funding Agent" means The Bank of Nova Scotia.

     "Canadian Priming Liens" means Liens which under applicable Canadian law
would prime the Security Interest in the Collateral of any Canadian Entity,
as such Liens are listed on Annex H hereto.

     "Canadian Reserve" means at the date of determination, the sum of (1) the
amount, if any, by which the Canadian Borrowing Base in effect on such date
exceeds the Letter of Credit Amount of the Canadian Financing Letter of
Credit, provided that MasTec may instruct the Agent in writing to set this
amount at zero, and (2) at the Administrative Agent's discretion, an amount
equal to its reasonable estimate of the Canadian Entity's liabilities secured
by Canadian Priming Liens.

      "Capital Expenditures" means, with respect to any Person, all
expenditures made (net of insurance proceeds so applied) and liabilities
incurred for the acquisition of assets (other than Inventory or assets that
constitute a Business Unit) which are not, in accordance with GAAP, treated
as expense items for such Person in the year made or incurred or as a prepaid
expense applicable to a future year or years.

     "Capitalized Lease" means a lease that is required to be capitalized for
financial reporting purposes in accordance with GAAP.

     "Capitalized Lease Obligation" means Indebtedness represented by
obligations under a Capitalized Lease, and the amount of such Indebtedness
shall be the capitalized amount of such obligations determined in accordance
with GAAP.

     "Cash Collateral" means collateral consisting of cash or Cash
Equivalents on which the Administrative Agent, for the benefit of itself
as Administrative Agent and the Lenders, has a first priority Lien.

     "Cash Collateral Account" means a special interest-bearing deposit account
consisting of cash maintained by the Administrative Agent in the name of MasTec
but under the sole dominion and control of the Administrative Agent, for its
benefit and for the benefit of the Lenders, established pursuant to the
provisions of Section 4.17(a) for the purposes set forth therein.

     "Cash Equivalents" means

     (a)  marketable direct obligations issued or unconditionally guaranteed
by the United States Government or issued by any agency thereof and backed by
the full faith and credit of the United States, in each case maturing within
one year from the date of acquisition thereof;

     (b)  commercial paper maturing no more than one year from the date issued
and, at the time of acquisition thereof, rated at least A-1 by S&P or at least
P-1 by Moody's;

     (c)  certificates of deposit or bankers' acceptances issued in Dollar
denominations and maturing within one year from the date of issuance thereof
issued by any commercial bank organized under the laws of the United States
of America or any state thereof or the District of Columbia having combined
capital and surplus of not less than $100,000,000 and, unless issued by a
Lender, not subject to set-off or offset rights in favor of such bank arising
from any banking relationship with such bank;

     (d)  units or other interests in funds invested solely in instruments
described in clauses (a), (b) and (c); and

     (e)  repurchase agreements in form and substance and for amounts
satisfactory to the Administrative Agent.

     "Clearing Bank" means Bank, Wachovia Bank, N.A., each bank listed on
Schedule 1.1C - Clearing Banks, and any other banking institution with which
a Controlled Account has been established pursuant to a Control Agreement.

     "Code" means the Internal Revenue Code of 1986, as amended from time to
time.

     "Collateral" means all of each Loan Party's right, title and interest in
and to each of the following, wherever located and whether now or hereafter
existing or now owned or hereafter acquired or arising:

     (a)  (i) all rights to the payment of money or other forms of
consideration of any kind (whether classified under the UCC as accounts,
chattel paper, general intangibles, payment intangibles, instruments, or
otherwise) including, but not limited to, accounts receivable, insurance
proceeds, letters of credit, letter-of-credit rights, chattel paper, any
rights under contracts not yet earned by performance and not evidenced by
an instrument or chattel paper, notes, drafts, instruments, documents,
acceptances and all other debts, obligations and liabilities in whatever
form from any Person, (ii) all guarantees, security, Liens and other
supporting obligations securing payment thereof, (iii) all goods, whether now
owned or hereafter acquired, and whether sold, delivered, undelivered, in
transit or returned, which may be represented by, or the sale or lease of
which may have given rise to, any such right to payment or other debt,
obligation or liability, and (iv) all proceeds of any of the foregoing
(the foregoing, collectively, "Accounts"),

     (b)  (i) all inventory, (ii) all goods intended for sale or lease or for
display or demonstration, (iii) all work in process, (iv) all raw materials
and other materials and supplies of every nature and description used or which
might be used in connection with the manufacture, packing, shipping,
advertising, selling, leasing or furnishing of goods or services or otherwise
used or consumed in the conduct of business, and (v) all documents of title,
including bills of lading and warehouse receipts, and other documents
evidencing and general intangibles relating to any of the foregoing (the
foregoing, collectively, "Inventory"),

     (c)  (i) all machinery, apparatus, equipment, motor vehicles, tractors,
trailers, rolling stock, fittings, fixtures and other tangible personal
property (other than Inventory) of every kind and description, (ii) all
tangible personal property (other than Inventory) and fixtures used in such
Person's business operations or owned by such Person or in which such Person
has an interest, and (iii) all parts, accessories and special tools and all
increases and accessions thereto and substitutions and replacements therefor,
excluding, however, any such property that is subject to a lease or Lien
permitted to exist by this Agreement, the terms of which prohibit the
creation of the Security Interest therein, for so long as such prohibition
remains in effect (the foregoing, collectively, "Equipment"),

     (d)  all general intangibles, choses in action and causes of action,
commercial tort claims and all other intangible personal property of every
kind and nature (other than Accounts), including, without limitation,
Proprietary Rights, partnership and joint venture interests, membership
interests and other interests in limited liability companies, corporate or
other business records, inventions, designs, blueprints, plans, specifications,
trade secrets, goodwill, computer software, customer lists, registrations,
licenses, franchises, tax refund claims, reversions or any rights thereto and
any other amounts payable to such Person from any Benefit Plan, Multiemployer
Plan or other employee benefit plan, rights and claims against carriers and
shippers, rights to indemnification, business interruption insurance and
proceeds thereof, property, casualty or any similar type of insurance and
any proceeds thereof, the beneficiary's interest in proceeds of insurance
covering the lives of key employees and any letter of credit, guarantee,
claims, security interest or other security for the payment by an Account
Debtor of any of the Accounts (the foregoing, collectively, "General
Intangibles"),

     (e)  any demand, time, savings, passbook, money market or like
depository account, and all certificates of deposit, maintained with a bank,
savings and loan association, credit union or like organization (other than
an account evidenced by a certificate of deposit that is an instrument under
the UCC) (the foregoing, collectively, "Deposit Accounts"),

     (f)  all certificated and uncertificated securities (other than 35% of
the shares of any Foreign Subsidiary), all security entitlements, all
securities accounts, all commodity contracts and all commodity accounts
(the foregoing, collectively, "Investment Property"),

     (g)  (i) any investment account maintained by or on behalf of a Loan
Party with the Administrative Agent or any Lender or any Affiliate of the
Administrative Agent or any Lender, (ii) any agreement governing such account,
(iii) all cash proceeds and Investment Property now or hereafter held by the
Administrative Agent or any Lender or any Affiliate of the Administrative
Agent or any Lender on behalf of a Loan Party in connection with such
investment account and (iv) all documents evidencing and general intangibles
related to the foregoing (the foregoing, collectively, "Investment Accounts"),

     (h)  all cash or other property deposited with the Administrative Agent
or any Lender or any Affiliate of the Administrative Agent or any Lender or
which the Administrative Agent, for its benefit and for the benefit of the
Lenders, or any Lender or such Affiliate is entitled to retain or otherwise
possess as collateral pursuant to the provisions of this Agreement or any of
the Loan Documents or any agreement relating to any Letter of Credit,
including, without limitation, amounts on deposit in the Cash Collateral
Account,

     (i)  all goods and other property, whether or not delivered, (i) the sale
or lease of which gives or purports to give rise to any Account, including,
but not limited to, all merchandise returned or rejected by or repossessed
from customers, or (ii) securing any Account, including, without limitation,
all rights as an unpaid vendor or lienor (including, without limitation,
stoppage in transit, replevin and reclamation) with respect to such goods and
other properties,

     (j)  all supporting obligations, including all mortgages, deeds to
secure debt and deeds of trust on real or personal property, guarantees,
leases, security agreements and other agreements and property which secure
or relate to any Account or other Collateral or are acquired for the purpose
of securing and enforcing any item thereof,

     (k)  all files, correspondence, computer programs, tapes, disks and
related data processing software which contain information identifying or
pertaining to any of the Collateral or any Account Debtor or showing the
amounts thereof or payments thereon or otherwise necessary or helpful in
the realization thereon or the collection thereof, and

    (l)  any and all products and cash and non-cash proceeds of the foregoing
(including, but not limited to, any claims to any items referred to in this
definition and any claims against third parties for loss of, damage to or
destruction of any or all of the Collateral or for proceeds payable under
or unearned premiums with respect to policies of insurance) in whatever form,
including, but not limited to, cash, negotiable instruments and other
instruments for the payment of money, chattel paper, security agreements
and other documents.

     "Commitment" means, as to each Lender, the amount set forth opposite such
Lender's name on Annex A hereto or, from and after the date hereof, as set
forth in the Register, representing such Lender's obligation, upon and subject
to the terms and conditions of this Agreement (including the applicable
provisions of Section 13.1), to make its Ratable Share of Loans (including
to repay Swingline Loans) and to purchase participations in Letter of Credit
Guarantees.

     "Commitment Increase" has the meaning specified in Section 2.5(b).

     "Commitment Increase Approvals" means any and all corporate action and
Governmental Approvals, if any, necessary to permit the Commitment Increase
to become effective in accordance the applicable provisions of this Agreement.

     "Commitment Percentage" means, as to any Lender at the time of
determination, the percentage obtained by dividing such Lender's Commitment
at such time by the aggregate amount of the Commitments at such time.

     "Consolidated Subsidiary" means each Subsidiary of MasTec the financial
results of which, at the time in question, are consolidated with those of
MasTec in accordance with GAAP.

     "Contaminant" means any waste, pollutant, hazardous substance, toxic
substance, hazardous waste, special waste, petroleum or petroleum-derived
substance or waste, or any constituent of any such substance or waste.

     "Control Agreement" means an agreement among a Loan Party, the
Administrative Agent and a Clearing Bank, in form and substance satisfactory
to the Administrative Agent, concerning the collection and transfer of
payments which represent the proceeds of Accounts or of any other Collateral.

     "Controlled Account" means a Deposit Account of a Loan Party maintained
by it with a Clearing Bank pursuant to a Control Agreement.

     "Debt" means

     (a)  Indebtedness for money borrowed,

     (b)  Indebtedness, whether or not in any such case the same was for money
borrowed,

         (i)  represented by notes payable, drafts accepted and reimbursement
obligations under letters of credit, including Reimbursement Obligations, and
similar instruments that represent extensions of credit,

        (ii)  constituting obligations evidenced by bonds, debentures, notes
or similar instruments,

       (iii)  any amounts required to be included in the Purchase Price of any
Acquisition pursuant to Section 11.4 and not paid in cash or by delivery of
shares or other property at the closing of such Acquisition,

        (iv)  upon which interest charges are customarily paid or that was
issued or assumed as full or partial payment for property (other than trade
credit that is incurred in the ordinary course of business),

     (c)  Capitalized Lease Obligations, and

     (d)  Guarantees of Debt.

     "Default" means any of the events specified in Section 12.1 which with
the passage of time or giving of notice or both would constitute an Event of
Default.

     "Default Margin" means 2.0%.

     "Deposit Account" has the meaning specified in the definition "Collateral."

     "Dilution Reserve" means an amount equal to the excess of (i) non-cash
reductions to the Loan Parties' accounts receivable (on a combined basis)
during the 12-month period prior to the date of determination as established
by the Loan Parties' records or by a field examination conducted by the
Administrative Agent's employees or representatives, expressed as a percentage
of the Loan Parties' revenues (on a combined basis) for the same period
(excluding, however, (1)  from both numerator and denominator Accounts in
respect of which a performance or surety bond has been issued and remains
outstanding and (2) non-cash reductions to Accounts during Fiscal Year 2001
in an amount not greater than $180,000,000) over (ii) 5%, multiplied by an
amount equal to Eligible Accounts as of the date of determination, as the same
may be adjusted by the Administrative Agent in accordance with Section
4.7(c)(ii).

     "Disbursement Account" means one or more accounts maintained by and in the
name of the Borrowers (or any of them) with Bank for the purposes of disbursing
Loan proceeds.

     "Disbursing Bank" means any commercial bank with which a Disbursement
Account is maintained after the Effective Date.

     "Dollar" and "$" means freely transferable United States dollars.

     "Dollar Equivalent" of an amount expressed in C$ (or another currency
other than Dollars) on any day means an amount expressed in Dollars which was
(or would have been) necessary to purchase such stated amount of C$ (or other
currency) at the spot rate of exchange prevailing on such day (or, if such day
is not a Business Day, on the next preceding Business Day) for purchases of C$
(or such other currency) in Dollars as published in The Wall Street Journal
or, if The Wall Street Journal no longer publishes such rate, as published in
a comparable source selected by the Administrative Agent.

     "EBITDA" for any Person for a specified accounting period means Net Income
of such Person and, if applicable, its consolidated Subsidiaries on a
consolidated basis for such period before provision for interest expense,
income tax expense, depreciation expense and amortization expense, each to the
extent deducted in computing Net Income for such specified period.

     "EBITDA Adjustment Amounts" means amounts deducted from Net Income for the
purpose of calculating EBITDA in respect of (1) increases in reserves for
uncollectible or doubtful accounts, (2) write-offs or write-downs of
Investments or other assets, not in the ordinary course of business, including
of goodwill, and (3) severance compensation to former executive officers, but
not to exceed the amounts during the periods listed on Annex G.

     "ERISA" means the Employee Retirement Income Security Act of 1974, as in
effect from time to time.

     "ERISA Event" means (a) a "Reportable Event" as defined in Section 4043(c)
of ERISA, but excluding any such event as to which the provision for 30 days'
notice to the PBGC is waived under applicable regulations, (b) the filing of a
notice of intent to terminate a Benefit Plan subject to Title IV of ERISA under
a distress termination under Section 4041(c) of ERISA or the treatment of an
amendment to such a Benefit Plan as a termination under Section 4041(c) of
ERISA, (c) the institution of proceedings by the PBGC to terminate a Benefit
Plan subject to Title IV of ERISA or the appointment of a trustee to
administer any such Benefit Plan or an event or condition that might
reasonably be expected to constitute grounds under Section 4042 of ERISA for
the termination of, or the appointment of a trustee to administer, any Benefit
Plan subject to Section 4042, (d) the imposition of any liability under Title
IV of ERISA other than for PBGC premiums due but not yet payable, (e) the
filing of an application for a minimum funding waiver under Section 412 of
the Code, (f) a withdrawal by a Borrower or any Related Company from a Benefit
Plan subject to Section 4063 of ERISA during a plan year in which it was a
"substantial employer" as defined in Section 4001(a)(2) of ERISA), (g) a
Benefit Plan intending to qualify under Section 401(a) of the Code losing such
qualified status (other than because of a Remediable Defect), (h) the failure
to make a material required contribution to a Benefit Plan, (i) a Borrower or
any Related Company being in "default" (as defined in Section 4219(c)(5) of
ERISA) with respect to payments to a Multiemployer Plan because of its
complete or partial withdrawal (as described in Section 4203 or 4205 of
ERISA) from such Multiemployer or Plan, or (j) the occurrence of a material
non-exempt prohibited transaction within the meaning of Section 4975 of the
Code or Section 406 of ERISA with respect to any Benefit Plan that is not
cured within 60 days after a Borrower has knowledge thereof.

     "Effective Date" means the later of:

     (a)  the Agreement Date, and

     (b)  the first date on which all of the conditions to the initial Loans
set forth in Article 5 shall have been fulfilled.

     "Effective Interest Rate" means each rate of interest per annum on
Revolving Credit Loans and Swingline Loans in effect from time to time
pursuant to the provisions of Sections 4.1(a) and (c).

     "Eligible Account" means the unpaid portion of an Account payable in
Dollars to a Loan Party net of any returns, discounts, credits, or other
allowances or deductions agreed to by a Loan Party and net of any amounts
owed by a Loan Party to the Account Debtor on such Account, which Account
meets all of the following requirements:  (a) such Account is owned by a
Loan Party and represents a complete bona fide transaction which requires no
further act under any circumstances on the part of any Loan Party to make
such Account payable by the Account Debtor; (b) such Account is not unpaid
more than 60 days after its due date or more than 90 days after the invoice
date; (c) such Account does not arise out of any transaction with any
Subsidiary, Affiliate, creditor or lessor of a Loan Party; (d) such Account
is not owing by an Account Debtor more than 20% (or as to any Approved
Account Debtor, 50%) of whose then-existing accounts owing to all the Loan
Parties do not meet the requirements set forth in clause (b) above; (e) if
the Account Debtor with respect thereto is located outside of the United
States of America, Canada or Puerto Rico, the goods which gave rise to such
Account were shipped after receipt by the applicable Loan Party from the
Account Debtor of an irrevocable letter of credit that has been confirmed
by a financial institution acceptable to the Administrative Agent and is in
form and substance acceptable to the Administrative Agent, payable in the full
face amount of the face value of the Account in Dollars at a place of payment
located within the United States and as to the related letter-of-credit
rights, the Administrative Agent has control; (f) the Account Debtor with
respect to such Account is not located in a state which imposes conditions on
the enforceability of Accounts with which the applicable Loan Party has not
complied; (g) such Account is not subject to the Assignment of Claims Act of
1940, as amended from time to time, or any applicable law now or hereafter
existing similar in effect thereto, as determined in the sole discretion of
the Administrative Agent, or to any provision prohibiting its assignment or
requiring notice of or consent to such assignment; (h) the Loan Party that is
the obligee thereof is not in breach of any express or implied representation
or warranty with respect to the goods the sale of which or the services, the
performance of which, gave rise to such Account; (i) the Account Debtor with
respect to such Account is not insolvent or the subject of any bankruptcy or
insolvency proceedings of any kind (but excluding Accounts arising under and
in accordance with the terms of post-petition contracts approved by the court
in which the bankruptcy case of the Account Debtor is being heard or otherwise
permitted in such case) or of any other proceeding or action, threatened or
pending, which might, in the Administrative Agent's judgment, have a
materially adverse effect on such Account Debtor; (j) the goods, if any, the
sale of which gave rise to such Account were shipped or delivered to the
Account Debtor on an absolute sale basis and not on a bill and hold sale basis,
a consignment sale basis, a guaranteed sale basis, a sale or return basis or
on the basis of any other similar understanding, and such goods have not been
returned or rejected; (k) such Account is not owing by an Account Debtor or a
group of affiliated Account Debtors whose then-existing Accounts owing to the
Loan Parties exceed in face amount 7.5% (or as to any Approved Account Debtor,
15%) of the aggregate Eligible Accounts, but only to the extent of the excess
over 7.5% (or 15%, as the case may be); (l) such Account is evidenced by an
invoice or other documentation in form acceptable to the Administrative Agent
containing only terms normally offered by the applicable Loan Party; (m) such
Account is a valid, legally enforceable obligation of the Account Debtor with
respect thereto and is not subject to any present, or contingent (and no facts
exist which are the basis for any future), offset, deduction or counterclaim,
dispute or other defense on the part of such Account Debtor; (n) such Account
is not evidenced by chattel paper or an instrument of any kind; (o) such
Account does not arise from the performance of services under a contact in
respect of which any performance bond or surety has been issued or under or
related to any warranty obligation of a Loan Party or out of service charges
by a Loan Party or other fees for the time value of money; (p) such Account
is subject to the Security Interest, which is perfected as to such Account,
and is subject to no other Lien whatsoever other than a Permitted Lien and
any goods giving rise to such Account were not, at the time of the sale
thereof, subject to any Lien other than a Permitted Lien; and (q) such Account
is not determined by the Administrative Agent, in the exercise of its
reasonable credit judgment, to be ineligible for any reason.

     "Eligible Assignee" means (i) a commercial bank organized under the laws
of the United States, or any State thereof, having total assets in excess of
$1,000,000,000; (ii) any Lender or United States - based Affiliate of a Lender
having total assets in excess of $1,000,000,000; and (iii) any other Person
approved by the Administrative Agent and, so long as no Default or Event of
Default has occurred and is continuing, MasTec; provided that the
representation contained in Section 13.2 hereof shall be applicable with
respect to any such Person.

     "Eligible Fixed Assets" means Equipment owned by a Loan Party, subject
to the Security Interest and to no other Lien, that is located within the
continental United States and has been included in an appraisal report
accepted by the Administrative Agent.

     "Eligible Unbilled Account" means an amount which, when an invoice is
issued with respect thereto, will be an Eligible Account, and in respect of
which an invoice is issued within 30 days (or, in the case of MasTec's Energy
Group, 45 days) after such amount is first included as an "Eligible Unbilled
Account" on any Borrowing Base Certificate.

     "Environmental Laws" means all federal, state, local and foreign laws now
or hereafter in effect relating to pollution or protection of the environment,
including laws relating to emissions, discharges, Releases or threatened
Releases of pollutants, Contaminants, chemicals, or industrial, toxic or
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, removal, transport, or handling of pollutants, Contaminants,
chemicals, or industrial, toxic or hazardous substances or wastes, and any
and all regulations, notices or demand letters issued, entered, promulgated or
approved thereunder; such laws and regulations include but are not limited to
the Resource Conservation and Recovery Act, 42 U.S.C.SS 6901 et seq., as
amended; the Comprehensive Environmental Response, Compensation and Liability
Act, 42 U.S.C. SS 9601 et seq., as amended; the Toxic Substances Control Act,
15 U.S.C.SS 2601 et seq., as amended; the Clean Air Act, 46 U.S.CSS 7401 et
seq., as amended; and state and federal lien and environmental cleanup programs.

     "Environmental Lien" means a Lien in favor of any governmental entity for
(a) any liability under Environmental Laws or (b) damages arising from, or
costs incurred by such governmental entity in response to, a Release or
threatened Release of Contaminant into the environment.

     "Equipment" has the meaning specified in the definition "Collateral."

     "Event of Default" means any of the events specified in Section 12.1,
provided that any requirement for notice or lapse of time or any other
condition has been satisfied.

     "Existing Loan Agreement" has the meaning specified in the Preliminary
Statement.

     "FCC" means Fleet Capital Corporation, a Rhode Island corporation.

     "FSI" means Fleet Securities, Inc., a New York corporation.

     "Federal Funds Rate" means, for any period, a fluctuating interest rate
per annum equal for each day during such period to the weighted average of the
rates on overnight federal funds transactions with members of the Federal
Reserve system arranged by federal funds brokers, as published for such day
(or, if such day is not a Business Day, for the next preceding Business Day)
by the Federal Reserve Bank of New York, or, if such rate is not so published
for any day which is a Business Day, the average of the quotations for such
day on such transactions received by the Bank from three federal funds brokers
of recognized standing selected by the Bank.

     "Financed Capex" means Capital Expenditures financed with permitted Debt
(other than Loans).

     "Financial Officer" means the Chief Financial Officer, Treasurer or
Controller of MasTec.

     "Financing Statements" means any and all Uniform Commercial Code financing
statements, in form and substance satisfactory to the Administrative Agent, the
filing of which by the Administrative Agent is authorized by the debtor named
therein, or assigned to the Administrative Agent by the Bank, naming the
Administrative Agent, for the benefit of the Lenders, as secured party or
assignee and the applicable Loan Party as debtor, in connection with this
Agreement.

     "Fiscal Quarter" means each of the four consecutive three-month periods
beginning on the first day of the Fiscal Year.

     "Fiscal Year" means the calendar year and when followed or preceded by the
designation of a calendar year, means the Fiscal Year ending on December 31 of
such designated calendar year.

     "Fixed Charge Coverage Ratio" means, for any specified accounting period,
the ratio of EBITDA of MasTec's NAOperations for such period, adjusted, as
appropriate, to add back any EBITDA Adjustment Amounts deducted in computing
such EBITDA, plus cash income tax refunds received in respect of periods
beginning after January 1, 2002 (but not less than zero), less the sum of
cash income taxes paid and Restricted Payments (other than to the extent
permitted by this Agreement), Restricted Distributions (other than to the
extent permitted by this Agreement), and Capital Expenditures (other than
Financed Capex) made, on a consolidated basis by MasTec's NAOperations during
such period, to the sum of their consolidated interest expense for such period
and current maturities of long-term debt as of the date of determination,
provided, that for any specified accounting period of less than 12 consecutive
months, current maturities of long-term Debt as of the date of determination
shall be multiplied by a fraction, the numerator of which is the number of
months included in such specified accounting period and the denominator of
which is 12.

     "Foreign Lender" means any Lender that is not a "U.S. Person" as defined
in Section 7701(a)(3) of the Code.

     "Foreign Subsidiary" means any Subsidiary organized under the laws of a
jurisdiction outside of the United States of America.

     "GAAP" means generally accepted accounting principles consistently
applied and maintained throughout the period indicated and, when used with
reference to a Borrower or any Subsidiary, consistent with the prior financial
practice of MasTec, as reflected on the financial statements referred to in
Section 6.1(n); provided, however, that, in the event that changes shall be
mandated by the Financial Accounting Standards Board or any similar accounting
authority of comparable standing, or shall be recommended by MasTec's
independent public accountants, such changes shall be included in GAAP as
applicable to MasTec's NAOperations only from and after such date as the Loan
Parties, the Required Lenders and the Administrative Agent shall have amended
this Agreement to the extent necessary to reflect the effects of any such
changes in the financial covenants set forth in Article 11.

     "General Intangibles" has the meaning specified in the definition
"Collateral."

     "Government Acts" has the meaning specified in Section 3.8(a)(ii).

     "Governmental Approvals" means all authorizations, consents, approvals,
licenses and exemptions of, registrations and filings with, and reports to,
all governmental bodies, whether federal, state, local or foreign national or
provincial and all agencies thereof.

     "Guaranty", "Guaranteed" or to "Guarantee" as applied to any obligation of
another Person shall mean and include

     (a)  a guaranty (other than by endorsement of negotiable instruments for
collection in the ordinary course of business), directly or indirectly, in any
manner, of any part or all of such obligation of such other Person, and

     (b)  an agreement, direct or indirect, contingent or otherwise, and
whether or not constituting a guaranty, the practical effect of which is to
assure the payment or performance (or payment of damages in the event of
nonperformance) of any part or all of such obligation of such other Person
whether by

          (i)  the purchase of securities or obligations,

         (ii)  the purchase, sale or lease (as lessee or lessor) of property
or the purchase or sale of services primarily for the purpose of enabling the
obligor with respect to such obligation to make any payment or performance
(or payment of damages in the event of nonperformance) of or on account of
any part or all of such obligation, or to assure the owner of such obligation
against loss,

        (iii)  the supplying of funds to or in any other manner investing in
the obligor with respect to such obligation,

         (iv)  repayment of amounts drawn down by beneficiaries of letters of
credit, or

          (v)  the supplying of funds to or investing in a Person on account
of all or any part of such Person's obligation under a Guaranty of any
obligation or indemnifying or holding harmless, in any way, such Person
against any part or all of such obligation.

     "Indebtedness" of any Person means, without duplication, all Liabilities
of such Person, and to the extent not otherwise included in Liabilities, the
following:

     (a)  all obligations for money borrowed or for the deferred purchase
price of property or services or in respect of drafts accepted or similar
instruments or reimbursement obligations under letters of credit,

     (b)  all obligations (including, during the noncancellable term of any
lease in the nature of a title retention agreement, all future payment
obligations under such lease discounted to their present value in accordance
with GAAP) secured by any Lien to which any property or asset owned or held
by such Person is subject, whether or not the obligation secured thereby shall
have been assumed by such Person,

     (c)  all obligations of other Persons which such Person has Guaranteed,
including, but not limited to, all obligations of such Person consisting of
recourse liability with respect to accounts receivable sold or otherwise
disposed of by such Person,

     (d)  all obligations of such Person in respect of Interest Rate Protection
Agreements, and

     (e)  in the case of the Loan Parties (without duplication) all obligations
under the Loans and the Reimbursement Obligations.

     "Indenture" means the Indenture, dated as of February 4, 1998 between
MasTec and First Trust National Association, as Trustee, governing the
Subordinated Notes.

     "Initial Notice of Borrowing" means the Notice of Borrowing given by the
Borrowers with respect to the Loans to be made on the Effective Date which
shall also specify the method of disbursement.

     "Interest Payment Date" means the first day of each calendar month
commencing February 1, 2002.

     "Interest Period" means with respect to each LIBOR Loan, the period
commencing on the date of the making or continuation of or conversion to
such LIBOR Loan and ending one, two, three or six months thereafter, as the
Borrowers may elect in the applicable Notice of Borrowing or Notice of
Conversion or Continuation; provided, that:

          (i)  any Interest Period that would otherwise end on a day that is
not a Business Day shall, subject to the provisions of clause (iii) below, be
extended to the next succeeding Business Day unless such Business Day falls
in the next calendar month, in which case such Interest Period shall end on
the immediately preceding Business Day;

         (ii)  any Interest Period that begins on the last Business Day of a
calendar month (or on a day for which there is no numerically corresponding day
in the calendar month at the end of such Interest Period) shall, subject to
clause (iii) below, end on the last Business Day of a calendar month;

        (iii)  any Interest Period that would otherwise end after the
Termination Date shall end on the Termination Date; and

         (iv)  notwithstanding clause (iii) above, no Interest Period shall
have a duration of less than one month and if any applicable Interest Period
would be for a shorter period, such Interest Period shall not be available
hereunder.

     "Interest Rate Protection Agreement" means an interest rate swap, cap or
collar agreement or similar arrangement between any Person and a financial
institution providing for the transfer or mitigation of interest risks either
generally or under specific contingencies.

     "Inventory" has the meaning specified in the definition "Collateral."

     "Investment" means, with respect to any Person:

     (a)  the acquisition or ownership by such Person of any share of capital
stock, evidence of Indebtedness (including bank deposits) or other security
issued by any other Person,

     (b)  any loan, advance or extension of credit to, or contribution to the
capital of, any other Person, excluding advances to employees in the ordinary
course of business,

     (c)  any Guaranty of the obligations of any other Person,

     (d)  any other investment in any other Person, and

     (e)  any commitment or option to make any of the investments listed in
clauses (a) through (d) above if, in the case of an option, the consideration
therefor exceeds $1,000,000;

provided, however, that such Investment does not result in an Acquisition.

     "Investment Account" has the meaning specified in the definition
"Collateral."

     "Investment Property" has the meaning specified in the definition
"Collateral."

     "IRS" means the Internal Revenue Service.

     "Issuing Bank" means Bank or another Lender acceptable to the
Administrative Agent.

     "Lender" means at any time any financial institution party to this
agreement at such time, including any such Person becoming a party hereto
pursuant to the provisions of Article 13.

     "Letter of Credit" means each documentary or standby letter of credit
(i) issued by Bank for the account of a Borrower under the Existing Loan
Agreement and outstanding on the Effective Date or (ii) issued by the Issuing
Bank for the account of a Borrower or any Subsidiary and, in either case,
Guaranteed by FCC pursuant to Article 3.

     "Letter of Credit Amount" means, at any time with respect to any Letter of
Credit Guarantee, the aggregate maximum amount at any time available for
drawing under the Guaranteed Letter of Credit at such time (assuming all
conditions to drawing are satisfied).

     "Letter of Credit Availability" means, as of the date of determination,
the aggregate face amount of Letter of Credit Obligations available to be
incurred hereunder at the time of determination in accordance with Section 3.2,
which shall be an amount equal to the lesser of (i) the Letter of Credit
Guarantee Facility minus the Letter of Credit Obligations and (ii)
Availability, on such date.

     "Letter of Credit Guarantee" means any Guarantee pursuant to which FCC
or any of its Affiliates Guarantees to an Issuing Bank, the payment or
performance by a Loan Party of its Reimbursement Obligations under any Letter
of Credit, including by FCC's (or such Affiliate's) joining in the
Reimbursement Agreement for such Letter of Credit as a co-applicant or
otherwise as acceptable to the Issuing Bank.

     "Letter of Credit Guarantee Facility" means a subfacility of the Revolving
Credit Facility providing for the issuance of Letters of Credit and Letter of
Credit Guarantees as described in Article 3 in an aggregate amount of Letter
of Credit Obligations at any one time outstanding not to exceed $20,000,000
plus the amount available to be drawn from time to time under the Canadian
Financing Letter of Credit.

     "Letter of Credit Obligations" means, at any time, the sum of (a) the
Reimbursement Obligations at such time, plus (b) the aggregate Letter of
Credit Amount of Letter of Credit Guarantees outstanding at such time, plus
(c) the aggregate Letter of Credit Amount of Letter of Credit Guarantees the
issuance of which has at such time been authorized by the Administrative Agent
and FCC pursuant to Section 3.4(b) but that have not yet been issued,
in each case as determined by the Administrative Agent.

     "Letter of Credit Reserve" means, at any time, the aggregate Letter of
Credit Obligations at such time, other than Letter of Credit Obligations that
are fully secured by Cash Collateral.

     "Leverage Ratio" as of the last day of any Fiscal Quarter means the ratio
of the sum of Total Funded Debt plus (but without duplication) Letter of
Credit Obligations of MasTec's NA Operations, in each case as of such last day,
to EBITDA of MasTec's NA Operations for the period of four consecutive Fiscal
Quarters ended on such day adjusted, as appropriate, to add back any EBITDA
 Adjustment Amount otherwise deducted in computing such EBITDA.

     "Liabilities" of any Person means all items (except for items of capital
stock, additional paid-in capital or retained earnings, or of general
contingency or deferred tax reserves) which in accordance with GAAP would be
included in determining total liabilities as shown on the liability side of a
balance sheet of such Person as at the date as of which Liabilities are to be
determined.

     "LIBOR" means for any LIBOR Loan, the rate per annum (rounded upward, if
necessary to the nearest 1/32 of one percent) as determined on the basis of
the offered rates for deposits in Dollars, for a period comparable to the
Interest Period for such LIBOR Loan which appears on the Telerate page 3750
as of 11:00 a.m. (London time) on the day that is three  Business Days
preceding the first day of the Interest Period for such LIBOR Loan divided by
an amount equal to one minus the Reserve Percentage; provided, however, if
the rate described above does not appear on the Telerate System on any
applicable interest determination date, LIBOR shall be the rate (rounded
upwards as described above, if necessary) for deposits in Dollars for a period
substantially equal to the Interest Period for such LIBOR Loan appearing on
the Reuters Page "LIBO" (or such other page as may replace the LIBO Page on
that service for the purpose of displaying such rates), as of 11:00 a.m.
(London time), on the day that is three Business Days prior to the beginning
of such Interest Period divided by an amount equal to one minus the Reserve
Percentage.  If both the Telerate and Reuters systems are unavailable, then the
rate for that date will be determined on the basis of the offered rates for
deposits in Dollars for a period comparable to the Interest Period for such
LIBOR Loan which are offered by four major banks in the London interbank market
at approximately 11:00 a.m. (London time), on the day that is three Business
Days preceding the first day of the Interest Period for such LIBOR Loan, as
selected by the Administrative Agent.  The principal London office of each of
the major London Banks so selected will be requested to provide a quotation of
its Dollar deposit offered rate.  If at least two such quotations are provided,
the rate for that date will be the arithmetic mean of the quotations divided by
an amount equal to one minus the Reserve Percentage.  If fewer than two
quotations are provided as requested, the rate for that date will be determined
on the basis of the rates quoted for loans in Dollars to leading European banks
for a period comparable to the Interest Period for such LIBOR Loan offered by
major banks in New York City at approximately 11:00 a.m. (New York City time),
on the day that is two Business Days preceding the first day of the Interest
Period for such LIBOR Loan divided by an amount equal to one minus the Reserve
Percentage.  In the event that Lender is unable to obtain any such quotation
as provided above, it will be determined that LIBOR for such LIBOR Loan cannot
be determined.

     "LIBOR Loan" means any Revolving Credit Loan (or Loans) made or converted
or continued) by the Lenders Ratably on the same date for the same Interest
Period, bearing interest determined with reference to LIBOR.

     "Lien" as applied to the property of any Person means:

     (a)  any mortgage, deed to secure debt, deed of trust, lien, pledge,
charge, lease constituting a Capitalized Lease Obligation, conditional sale
or other title retention agreement, or other security interest, security
title or encumbrance of any kind in respect of any property of such Person,
or upon the income or profits therefrom,

     (b)  any arrangement, express or implied, under which any property of such
Person is transferred, sequestered or otherwise identified for the purpose of
subjecting the same to the payment of Indebtedness or performance of any other
obligation in priority to the payment of the general, unsecured creditors of
such Person,

     (c)  any Indebtedness which is unpaid more than 30 days after the same
shall have become due and payable and which if unpaid might by law (including,
but not limited to, bankruptcy and insolvency laws), or otherwise, be given
any priority whatsoever over the claims of general unsecured creditors of
such Person, except to the extent being disputed or contested by such Person
by appropriate proceedings and in respect of which any reserve required by
GAAP has been appropriately established and maintained,

     (d)  the filing of, or any agreement to give, any financing statement
under the UCC or its equivalent in any jurisdiction (excluding informational
financing statements relating to property leased by a Borrower or any
Subsidiary), and

     (e)  in the case of Real Estate, reservations, exceptions, encroachments,
easements, rights-of-way, covenants, conditions, restrictions, leases and
other title exceptions and encumbrances.

     "Loan" means any Revolving Credit Loan or Swingline Loan, as well as all
such loans collectively, as the context requires.

     "Loan Account" and "Loan Accounts" have the meanings specified in Section
4.5.

     "Loan Documents" means collectively this Agreement, the Notes, the
Security Documents and each other instrument, agreement or document executed
by a Loan Party or any Affiliate or Subsidiary of a Loan Party in connection
with this Agreement whether prior to, on or after the Effective Date and each
 other instrument, agreement or document referred to herein or contemplated
hereby.

     "Loan Party" means any Borrower or Subsidiary Guarantor or Subsidiary that
has executed and delivered a Subsidiary Security Agreement.

     "Lockbox" means each U. S. Post Office Box specified in a Lockbox
Agreement.

     "Lockbox Agreement" means each agreement between a Borrower and a
Clearing Bank concerning the establishment of a Lockbox for the collection
of Accounts.

     "Make Whole Amount" has the meaning specified in Section 4.7(b).

      "Margin Adjustment Date" has the meaning specified in the definition
"Applicable Margin."

     "Margin Stock" means margin stock as defined in Section 221.1(h) of
Regulation U.

     "MasTec" means MasTec, Inc., a Florida corporation.

     "MasTec Brasil" means MasTec Brasil, S.A. and its Subsidiaries.

     "MasTec Canada" means Phasecom Systems Inc., a Canadian corporation.

     "MasTec North America" means MasTec North America, Inc., a Florida
corporation and a wholly owned subsidiary of MasTec.

     "MasTec's NAOperations" means MasTec and the other Loan Parties, on a
consolidated basis in accordance with GAAP.

     "Materially Adverse Effect" means any act, omission, situation,
circumstance, event or undertaking which would, singly or in any combination
with one or more other acts, omissions, situations, circumstances, events or
undertakings, have, or reasonably be expected to have, a materially adverse
effect upon (a) the business, assets, properties, liabilities, condition
(financial or otherwise), results of operations or business prospects of
MasTec and its Consolidated Subsidiaries taken as a whole, (b) the value of
the whole or any material part of the Collateral, (c) the Security Interest
or the priority of the Security Interest, (d) the ability of MasTec and its
Consolidated Subsidiaries taken as a whole to perform any material obligation
under this Agreement or any other Loan Document, or (e) other than solely and
directly by reason of any release given or other action taken by the
Administrative Agent or any Lender, the legality, validity, binding effect,
enforceability or admissibility into evidence of any Loan Document or the
ability of the Administrative Agent or the Lenders to enforce in any material
respect any rights or remedies under or in connection with the Loan Documents.

     "Minimum Commitment" means $2,500,000.

     "Moody's" means Moody's Investors Service, Inc.

     "Mortgage" means each mortgage, deed of trust, deed to secure debt or
other instrument creating or purporting to create a Lien on Real Estate as
security for the Secured Obligations or any part thereof.

     "Multiemployer Plan" means a "multiemployer plan" as defined in Section
4001(a)(3) of ERISA to which a Borrower or a Related Company is required to
contribute or has contributed within the immediately preceding six years.

     "Net Amount" means, with respect to any Investments made by any Person,
the gross amount of all such Investments minus the aggregate amount of all cash
received and the fair value, at the time of receipt by such Person, of all
property received as payments of principal or premiums, returns of capital,
liquidating dividends or distributions, proceeds of sale or other dispositions
with respect to such Investments.

     "Net Income" or "Net Loss" means, as applied to any Person for any
accounting period, the net income or net loss, as the case may be, of such
Person for the period in question determined in accordance with GAAP, provided
that there shall be excluded:

     (a)  the net income or net loss of any Person accrued prior to the date it
becomes a Subsidiary of, or is merged into or consolidated with, the Person
whose Net Income is being determined or a Subsidiary of such Person,

     (b)  the net income or net loss of any Person in which the Person whose
Net Income is being determined or any Subsidiary of such Person has an
ownership interest, except, in the case of net income, to the extent that any
such income has actually been received by such Person or such Subsidiary in
the form of cash dividends or similar distributions,

     (c)  any restoration of any contingency reserve, except to the extent that
provision for such reserve was made out of income during such period,

     (d)  any net gains or losses on the sale or other disposition, not in the
ordinary course of business, of Investments, Business Units and other capital
assets, provided that there shall also be excluded any related charges for
taxes thereon,

     (e)  any net gain arising from the collection of the proceeds of any
insurance policy,

     (f)  any write-up or, if less than $10,000,000, write-down of any asset,
and

     (g)  any other extraordinary item.

     "Net Outstandings" of any Lender means, at any time, the sum of (a) all
amounts paid by such Lender (other than pursuant to Section 14.7) to the
Administrative Agent in respect of Revolving Credit Loans made by such Lender,
minus (b) all amounts received by the Administrative Agent and paid by the
Administrative Agent to such Lender for application, pursuant to this
Agreement, to reduction of the outstanding principal balance of the outstanding
Revolving Credit Loans of such Lender.

     "Net Worth" means, with respect to any Person, such Person's total
shareholder's equity (including any capital stock, warrants, additional paid-in
capital and retained earnings, after deducting treasury stock) which would
appear as such on a balance sheet of such Person prepared in accordance with
GAAP.

     "Note" means any of the Revolving Credit Notes and the Swingline Note and
"Notes" means more than one such Note.

     "Notice of Borrowing" means a written notice (including by electronic
 mail, but subject to any Bank requirements applicable from time to time of
 which MasTec has received notice), or telephonic notice followed by a
confirming same-day written notice, requesting a Borrowing of (i) Base Rate
Revolving Credit Loans or Revolving LIBOR Loans or (ii) a Swingline Loan,
which is given by telex or facsimile transmission in accordance with the
applicable provisions of Section 2.2 or Section 2A.2, as the case may be, and
which specifies (i) the amount of the requested Borrowing, (ii) the date of
the requested Borrowing, and (iii) if the requested Borrowing is of LIBOR
Loans, the duration of the applicable Interest Period.

     "Notice of Conversion or Continuation" has the meaning specified in
Section 4.13.

     "Overadvance" means at any time the amount by which the aggregate
outstanding principal amount of Loans exceeds the Borrowing Base.

     "Overadvance Condition" means and is deemed to exist any time the
aggregate outstanding principal amount of Loans exceeds the Borrowing Base.

     "Overadvance Loan" means a Base Rate Loan made at a time an Overadvance
Condition exists or which results in an Overadvance Condition.

     "PBGC" means the Pension Benefit Guaranty Corporation and any successor
agency.

     "Permitted Investments" means

     (a)  Investments of MasTec and its Consolidated Subsidiaries in:

          (i)   cash and Cash Equivalents in an aggregate amount not greater
than $5,000,000 (provided that such limitation as to amount shall not apply
whenever there are no Loans outstanding hereunder),

          (ii)  sales of inventory on credit in the ordinary course of business,

          (iii) shares of capital stock, evidence of Debt or other security
acquired in consideration for or as evidence of past-due or restructured
Accounts,

          (iv)  any Loan Party, and

          (v)   those items described on Schedule 1.1A - Permitted Investments;
and

     (b)  Investments of any Loan Party in any Subsidiary that is not a Loan
Party to the extent in existence on the Effective Date, as such Investments may
increase by reason of the profitable operations of such Subsidiary.

     "Permitted Liens" means:

     (a)  Liens securing taxes, assessments and other governmental charges or
levies (excluding any Lien imposed pursuant to any of the provisions of ERISA)
or the claims of materialmen, mechanics, carriers, warehousemen or landlords
for labor, materials, supplies or rentals incurred in the ordinary course of
business, but (i) in all cases only if payment shall not at the time be
required to be made in accordance with Section 9.6, and (ii) in the case of
warehousemen or landlords, only if such liens are, to the extent requested
by the Administrative Agent, junior to the Security Interest in any of the
Collateral,

     (b)  Liens consisting of deposits or pledges made in the ordinary course
of business in connection with, or to secure payment of, obligations under
workers' compensation, unemployment insurance or similar legislation or under
payment or performance bonds and the Lien of the issuer of any such bond on
the bonded contract or proceeds thereof,

     (c)  Liens constituting encumbrances in the nature of zoning restrictions,
easements, and rights or restrictions of record on the use of real property,
which do not materially detract from the value of such property or impair the
use thereof in the business of the applicable Loan Party,

     (d)  Liens shown on Schedule 1.1B - Permitted Liens,

     (e)  Liens of the Administrative Agent, for the benefit of the Lenders,
arising under this Agreement and the other Loan Documents,

     (f)  Liens on Margin Stock,

     (g)  Liens in existence immediately prior to the Effective Date that are
satisfied in full and released on the Effective Date or promptly thereafter by
application of the proceeds of the Loans or cash on hand,

     (h)  the Lien of First Trust National Association as Trustee under the
Indenture pursuant to Section 7.07 thereof on certain property in its
possession as security for payment of fees and other amounts owing to it in
its capacity as such Trustee, and

     (i)  additional Liens in accordance with the provisions of Section 11.9.

     "Person" means an individual, corporation, limited liability company,
partnership, association, trust or unincorporated organization, or a
government or any agency or political subdivision thereof.

     "Pledge Agreement" means each Stock Pledge Agreement pursuant to which a
Loan Party pledges to the Administrative Agent as collateral for the Secured
Obligations, shares of capital stock or other equity interests in any
Subsidiary.

     "Projections" means the forecasted (a) balance sheets, (b) income
statements and (c) cash flow statements of MasTec's NA Operations and its
Subsidiaries for each Fiscal Year, prepared annually on a consolidated
quarterly basis, together with appropriate supporting details and a statement
of underlying assumptions.

     "Proprietary Rights" means as to any Person, such Person's rights, title
and interest in and to intellectual property and all other rights (including
rights as a licensee thereof) under any patents, trademarks, trade names,
tradestyles, copyrights and all extensions, renewals, reissues, divisions,
continuations, and continuations-in-part of any of the foregoing, and all
rights to sue for past, present and future infringement of any of the
foregoing.

     "Purchase Money Lien" means any Lien securing Debt created to finance the
payment of all or any part of the purchase price (not in excess of the fair
market value thereof) of any tangible personal property (other than Inventory)
and incurred at the time of or within 10 days prior to or after the acquisition
of such tangible asset, but only if such Lien shall at all times be confined
solely to the property (other than Inventory) the purchase price of which was
financed through the incurrence of such Debt.

     "Purchase Price" has the meaning specified in Section 11.4.

     "Ratable Share" or "Ratable" (and with corollary meaning, "Ratably")
means, as to a Lender, such Lender's share of an amount in Dollars or of other
property at the time of determination equal to (i) the Commitment Percentage of
such Lender, or (ii) if the Commitments are terminated, the percentage obtained
by dividing the principal amount of the Loans then owing to such Lender by the
total principal amount of all Loans then owing to all Lenders, or (iii) if no
Loans are outstanding, the percentage obtained by dividing such Lender's
participation in the total Letter of Credit Obligations then outstanding by
the total Letter of Credit Obligations then outstanding.

     "Real Estate" means all real property now or hereafter owned or leased by
MasTec or any Subsidiary, including, without limitation, all fees, leaseholds
and future interests.

     "Register" has the meaning specified in Section 13.1(d).

     "Regulation U" means Regulation U of the Board of Governors of the
Federal Reserve System (or any successor).

     "Reimbursement Agreement" means, with respect to a Letter of Credit, such
form of application therefor and form of reimbursement agreement therefor
(whether in a single document or several documents) as the Issuing Bank may
employ in the ordinary course of business for its own account, in such form as
may be acceptable to FCC in its reasonable judgment and with such modifications
thereto as may be agreed upon by the Issuing Bank, FCC and the Borrowers,
provided that such application and agreement and any modifications thereto
are not inconsistent with the terms of this Agreement.

     "Reimbursement Obligations" means the unsatisfied reimbursement or
repayment obligations of the Borrowers to FCC pursuant to Section 3.6 or (but
without duplication) to an Issuing Bank pursuant to a Reimbursement Agreement
with respect to amounts that have been drawn under Letters of Credit
Guaranteed by FCC.

     "Related Company" means any (i) corporation which is a member of the same
controlled group of corporations (within the meaning of Section 414(b) of the
Code) as MasTec; (ii) partnership or other trade or business (whether or not
incorporated) under common control (within the meaning of Section 414(c) of
the Code) with MasTec; or (iii) member of the same affiliated service group
(within the meaning of Section 414(m) of the Code) as MasTec, any corporation
described in clause (i) above or any partnership, trade or business described
in clause (ii) above.

     "Release" means release, spill, emission, leaking, pumping, injection,
deposit, disposal, discharge, dispersal, leaching or migration into the indoor
or outdoor environment or into or out of any property, including the movement
of Contaminants through or in the air, soil, surface water or groundwater.

     "Remediable Defect" means an operational defect or violation that could
disqualify a Benefit Plan intended to qualify under Section 401(a) (and, if
applicable, Section 401(k)) of the Code and that can be remedied under the
IRS's Closing Agreement Program, Voluntary Compliance Resolution Program, or
Administrative Policy Regarding Self-Correction, without in any case a payment
to any governmental authority with respect to such Benefit Plan and any other
Benefit Plan of more than $500,000 in any calendar year.

     "Remedial Action" means actions required to (i) clean up, remove, treat or
in any other way address Contaminants in the indoor or outdoor environment;
(ii) prevent the Release or threat of Release or minimize the further Release
of Contaminants so they do not migrate or endanger or threaten to endanger
public health or welfare or the indoor or outdoor environment; or (iii) perform
pre-remedial studies and investigations and post-remedial monitoring and care.

     "Rent Reserve" means an amount approximately equal to three times the
aggregate monthly rental payable by the Loan Parties on leased Real Estate (1)
upon which material Collateral is located and (2) in respect of which a
landlord's or warehouseman's waiver in form and substance satisfactory to the
Administrative Agent is not in effect,

     "Required Lenders" means, at any time, any combination of two or more
Lenders whose Ratable Shares at such time aggregate in excess of 51%.

     "Reserve Percentage" means that percentage (expressed as a decimal) which
is in effect from time to time under Regulation D of the Board of Governors of
the Federal Reserve System, as such regulation may be amended from time to
time, or any successor regulation, as the maximum reserve requirement
(including,  without limitation, any basic, supplemental, emergency, special,
or marginal reserves) applicable with respect to Eurocurrency liabilities as
that term is defined in Regulation D (or against any other category of
liabilities that includes deposits by reference to which the interest rate of
LIBOR Loans is determined), whether or not any Lender has any Eurocurrency
liabilities subject to such reserve requirement at that time.  LIBOR Loans
shall be deemed to constitute Eurocurrency liabilities and as such shall be
deemed subject to reserve requirements without benefits of credits for
proration, exceptions or offsets that may be available from time to time to
any Lender.

     "Restricted Distribution" by any Person means (a) its retirement,
redemption, purchase, or other acquisition or retirement for value of any
capital stock or other equity securities (except equity securities acquired on
the conversion or exercise thereof into other equity securities of such Person)
or partnership interests issued by such Person, (b) the declaration or payment
of any dividend or distribution in cash or property on or with respect to any
such securities (other than dividends payable solely in shares of its capital
stock) or partnership interests, excluding, however, any such dividend,
distribution or payment to a Loan Party by any of its Subsidiaries, (c) any
Investment (other than a Permitted Investment) by such Person in, the holder
of any of such securities or partnership interests, and (d) any other payment
by such Person in respect of such securities or partnership interests.

     "Restricted Payment" means (a) any redemption or prepayment or other
retirement, prior to the stated maturity thereof or prior to the due date of
any regularly scheduled installment or amortization payment with respect
thereto, of any Debt (other than the Loans) or of any Indebtedness that is
junior and subordinate to the Secured Obligations, (b) any payment on or with
respect to any Subordinated Debt other than in accordance with the subordina-
tion provisions thereof, (c) the payment by any Person of the principal amount
of or interest on any Indebtedness (other than trade accounts payable and
employee compensation in the ordinary course of business, consistent with past
practices) owing to an Affiliate of such Person and (d) the payment of any
management, consulting or similar fee by any Person to any Affiliate of such
Person.

     "Revolving Credit Facility" means the credit facility providing for
Revolving Credit Loans based upon the Borrowing Base and described in Section
2.1 up to an aggregate principal amount at any one time outstanding not to
exceed $75,000,000, as increased pursuant to Section 2.5 or reduced pursuant to
Section 2.5, 4.6, 4.9 or 12.2.

     "Revolving Credit Loans" means the Loans made to the Borrowers pursuant to
Section 2.1.

     "Revolving Credit Note" means each Promissory Note made by the Borrowers
payable to the order of a Lender evidencing the joint and several obligation of
the Borrowers to pay the aggregate unpaid principal amount of the Loans made to
them by such Lender under the Revolving Credit Facility (and any promissory
note or notes that may be issued from time to time in substitution, renewal,
extension, replacement or exchange therefor whether payable to such Lender or
to a different Lender in connection with a Person becoming a Lender after the
Effective Date or otherwise) substantially in the form of Exhibit A-1 hereto,
with all blanks properly completed, either as originally executed or as the
same may from time to time be supplemented, modified, amended, renewed,
extended or refinanced.

     "S&P" means Standard & Poor's Ratings Service, a division of The
McGraw-Hill Companies.

     "Schedule of Inventory" means a schedule delivered by the Borrowers to
the Administrative Agent pursuant to the provisions of Section 8.12(b).

     "Schedule of Accounts" means a schedule delivered by the Borrowers to the
Administrative Agent pursuant to the provisions of Section 8.12(a).

     "Secured Obligations" means, in each case whether now in existence or
hereafter arising,

     (a)  the principal of and interest on the Loans,

     (b)  the Reimbursement Obligations and all other obligations of the
Borrowers to FCC, any Lender or any Affiliate of a Lender arising in connection
with the issuance of Letter of Credit Guarantees,

     (c)  all obligations of the Borrowers to any Lender or any Affiliate of a
Lender under any Interest Rate Protection Agreement or foreign exchange
contract or option,

     (d)  all obligations of the Borrowers to any Lender in connection with
the maintenance of accounts, funds transfer, account analysis, cash management
fees, and related items, and

     (e)  all indebtedness, liabilities, obligations, covenants and duties of
the Borrowers or any Subsidiary to the Administrative Agent or to the Lenders
or to any Affiliate of the Administrative Agent or any Lender, of every kind,
nature and description arising under or in respect of this Agreement, the
Notes or any of the other Loan Documents, whether direct or indirect, absolute
or contingent, due or not due, contractual or tortious, liquidated or
unliquidated, and whether or not evidenced by any note, and whether or not for
the payment of money, including without limitation, fees required to be paid
pursuant to Article 4 and expenses required to be paid or reimbursed pursuant
to Section 15.2.

     "Security Documents" means the Financing Statements, the Pledge
Agreements, each Mortgage, each Title Certificate, any Subsidiary Security
Agreements and each other writing executed and delivered by a Loan Party or any
 other Person securing the Secured Obligations or assuring rights of the
Administrative Agent or the Lenders in respect of the Collateral.

     "Security Interest" means the Liens of the Administrative Agent, for the
benefit of itself as the Administrative Agent and the Lenders and Affiliates
of the Lenders, on and in the Collateral and the Real Estate effected hereby
or by any of the Security Documents or pursuant to the terms hereof or thereof.

     "Settlement Date" means any Business Day selected by the Administrative
Agent as a day on which each Lender's actual Net Outstandings and Ratable
Share of aggregate outstanding Revolving Credit Loans shall be reported to all
Lenders by the Administrative Agent.

     "Subordinated Debt" means the Subordinated Notes and any other Debt of
MasTec's NA Operations or any Subsidiary that is extended on, and is
subordinated to the Secured Obligations on, terms and conditions acceptable to
the Administrative Agent and the Required Lenders in their sole discretion.

     "Subordinated Notes" means MasTec's 7-3/4% Senior Subordinated Notes due
2008 in the original principal amount of $200,000,000, issued pursuant to the
Indenture, including any "Exchange Notes" issued (and as defined) thereunder.

     "Subsidiary" (a) when used to determine the relationship of a Person to
another Person, means a Person of which an aggregate of more than 50% of the
stock of any class or classes or more than 50% of other ownership interests is
owned of record or beneficially by such other Person, or by one or more
Subsidiaries of such other Person, or by such other Person and one or more
Subsidiaries of such Person,

     (i)  if the holders of such stock, or other ownership interests, (A) are
ordinarily, in the absence of contingencies, entitled to vote for the election
of a majority of the directors (or other individuals performing similar
functions) of such Person, even though the right so to vote has been suspended
by the happening of such a contingency, or (B) are entitled, as such holders,
to vote for the election of a majority of the directors (or individuals
performing similar functions) of such Person, whether or not the right so to
vote exists by reason of the happening of a contingency, or

     (ii)  in the case of such other ownership interests, if such ownership
interests constitute a majority voting interest and

           (b)  when used without other designation of ownership, means a
Subsidiary of MasTec.

     "Subsidiary Guarantor" means any Subsidiary of MasTec that is not a
Borrower and that has, at the Administrative Agent's request or with its
consent, executed and delivered the Subsidiary Guaranty or a joinder agreement
in respect thereof and a Subsidiary Security Agreement.

     "Subsidiary Guaranty" means a Guaranty of the Secured Obligations
substantially in the form of Exhibit E attached hereto or as otherwise
acceptable to the Administrative Agent and MasTec.

     "Subsidiary Security Agreement" means one or more agreements substantially
in the form of Exhibit F attached hereto or otherwise in form and substance
satisfactory to the Administrative Agent in its reasonable judgment, sufficient
to create in favor of the Administrative Agent a security interest in all of
the Account, Inventory, Equipment, Deposit Accounts, General Intangibles and
other Collateral and proceeds thereof of any Subsidiary Guarantor.

     "Supporting Letter of Credit" has the meaning specified in Section 3.9.

     "Swingline Facility" means an amount equal to $15,000,000.

     "Swingline Lender" means FCC.

     "Swingline Loan" means each Base Rate Loan by the Swingline Lender to the
Borrowers pursuant to Section 2A.1.

     "Swingline Loan Request" has the meaning set forth in Section 2A.2.

     "Swingline Note" means the Swingline Note made by the Borrowers payable to
the order of the Swingline Lender evidencing the joint and several obligation
of  the Borrowers to pay the aggregate unpaid principal amount of the Swingline
Loans made to them by the Swingline Lender under the Swingline Facility (and
any promissory note that may be issued from time to time in substitution,
renewal, extension, replacement or exchange therefor) substantially in the
form of Exhibit A-2 hereto, with all blanks properly completed, either as
originally executed or as the same may from time to time be supplemented,
modified, amended, renewed, extended or refinanced.

     "Tangible Net Worth" of any Person means such Person's Net Worth, less
goodwill and the value of any other intangible assets included in such
determination, less, in the case of MasTec's NAOperations, 100% of any
deferred tax assets created as a result of MasTec's NAOperations' compliance
with FASB 142.

     "Termination Date" means January 22, 2007 or such earlier date as all
Secured Obligations shall have been irrevocably paid in full and the
Commitments shall have been terminated.

     "Title Certificate" means each certificate of title covering a motor
vehicle owned by any Loan Party and reflecting thereon in accordance with
Applicable Law, the Security Interest.

     "Total Funded Debt" means at any time, the outstanding principal amount of
Debt of MasTec and its Consolidated Subsidiaries.

     "Type" when used in respect of any Loan or Borrowing, shall refer to the
rate by reference to which interest on such Loan or on the Loans comprising
such Borrowing is determined.

     "UCC" means the Uniform Commercial Code as in effect from time to time
in the applicable jurisdiction.

     "Unfunded Vested Accrued Benefits" means at any time, with respect to any
Benefit Plan that is a pension plan within the meaning of Section 3(2) of
ERISA, the amount (if any) by which (a) the present value of all vested
nonforfeitable benefits under such Benefit Plan exceeds (b) the fair market
value of all such Benefit Plan assets allocable to such benefits, as determined
using the valuation date and such reasonable actuarial assumptions and methods
as are specified in the Schedule B (Actuarial Information) to the most recent
Annual Report (Form 5500) filed with respect to such Benefit Plan.

     "Unused Commitments" has the meaning specified in Section 4.2(b).

     "Wholly Owned Subsidiary" when used to determine the relationship of a
Subsidiary to a Person means a Subsidiary all of the issued and outstanding
shares (other than directors' qualifying shares) of the capital stock of which
shall at the time be owned by such Person or one or more of such Person's
Wholly Owned Subsidiaries or by such Person and one or more of such Person's
Wholly Owned Subsidiaries.

     Section 1.2  General Interpretive Rules.

     (a)  All terms of an accounting nature not specifically defined herein
shall have the meanings ascribed thereto by GAAP.

     (b)  The terms accounts, chattel paper, contract rights, documents,
equipment, instruments, general intangibles, inventory, goods, letter-of-credit
rights, supporting obligation, deposit account, and proceeds, as and when used
in this Agreement or the Security Documents (without being capitalized), shall
have the meanings given those terms in the UCC.

     (c)  Unless otherwise specified, the words "hereof," "herein," "hereunder"
and words of similar import, when used in this Agreement, refer to this
Agreement as a whole and not to any particular provision, section or subsection
of this Agreement.

     (d)  Wherever from the context it appears appropriate, each term stated in
either the singular or plural shall include the singular and plural, and
pronouns stated in the masculine, feminine or neuter gender shall include the
masculine, the feminine and the neuter.  Words denoting individuals include
corporations and vice versa.

     (e)  References to any legislation or statute or code, or to any
provisions of any legislation or statute or code, shall include any
modification or reenactment of, or any legislative, statutory or code provision
substituted for, such legislation, statute or code or provision thereof.

     (f)  References to any document or agreement (including this Agreement)
shall include references to such document or agreement as amended, novated,
supplemented, modified or replaced from time to time, so long as and to the
extent that such amendment, novation, supplement, modification or replacement
is not prohibited by the terms of this Agreement or is consented to, if such
consent is required, in accordance with the applicable provisions of this
Agreement.

     (g)  Except where specifically restricted in a Loan Document, references
to any Person include its successors and substitutes and assigns permitted or
not prohibited under such Loan Document.

     (h)  References to the time of day are to the time of day in the city in
which the Administrative Agent's Office is located.

     (i)  The terms "payment", "prepayment", "distribution" and similar terms
used in the definitions of "Restricted Distribution" and "Restricted Payment"
and in Section 11.6, shall include payment by means of the transfer of funds
or of property and, in the event of a transfer of property, the payment shall
be deemed to be in an amount equal to the greater of the fair market value and
the book value of the property at the time of the transfer.

     (j)  Titles of Articles and Sections in this Agreement are for convenience
only, do not constitute part of this Agreement and neither limit nor amplify
the provisions of this Agreement, and all references in this Agreement to
Articles, Sections, subsections, paragraphs, clauses, subclauses, Schedules or
Exhibits shall refer to the corresponding Article, Section, subsection,
paragraph, clause or subclause of, or Schedule or Exhibit attached to, this
Agreement, unless specific reference is made to the articles, sections or other
subdivisions or divisions of, or to schedules or exhibits to, another document
or instrument.

     (k)  Whenever from the context it appears appropriate, the term "Loan",
including such terms as used as part of a defined term including the term
"Loan", shall mean and include a Loan made by all Lenders to the Borrowers
as well as a Lender's Ratable Share of any Loan.

     (l)  Whenever the phrase "to the knowledge of the Borrower" or words of
similar import relating to the knowledge of the Borrowers (or any of them) are
used herein, such phrase shall mean and refer to the actual knowledge of the
President or chief financial officer of such Borrower.

     (m)  Unless otherwise specified herein, any Lien created or purported to
be created hereby or by or pursuant to any Loan Documents in favor of the
Administrative Agent and each payment made to the Administrative Agent, is and
shall be deemed to have been created in favor of the Administrative Agent, for
its benefit as the Administrative Agent and for the Ratable benefit of the
Lenders, or made to and received by the Administrative Agent for the
Ratable benefit of the Lenders, as the case may be.

     (n)  Whenever in this Agreement or any other Loan Document the word
"stock" or "capital stock" or other similar word or phrase is used in
connection with a Loan Party or any Subsidiary of a Loan Party referring to
equity ownership interests in such Loan Party or such Subsidiary, such word
or phrase shall also be deemed to include a reference to member interests,
each reference to "corporation" with reference to a Loan Party or any
Subsidiary of a Loan Party shall also be deemed to include a reference to
limited liability companies and each reference to "certificate of
incorporation" or "articles of incorporation" or "bylaws" with reference
to a Loan Party or any Subsidiary of a Loan Party shall also be deemed to
include a reference to "certificate of formation" 1922:  and "operating
agreement" or other constituent documents of a limited liability
company.

     Section 1.3  Exhibits and Schedules.  All Exhibits and Schedules attached
hereto are by reference made a part hereof.

                                    ARTICLE 2

                           REVOLVING CREDIT FACILITY

     Section 2.1  Revolving Credit Loans.  Upon the terms and subject to the
conditions of, and in reliance upon the representations and warranties made
under, this Agreement, each Lender agrees, severally, but not jointly, to make
Revolving Credit Loans to the Borrowers from time to time from the Effective
Date to but not including the Termination Date, as requested or deemed
requested by the Borrowers in accordance with the terms of Section 2.2, in
amounts equal to such Lender's Ratable Share of each Revolving Credit Loan
requested or deemed requested hereunder up to an aggregate amount at any one
time outstanding equal to such Lender's Ratable Share of the Borrowing Base;
provided, however, that no Borrowing shall exceed Availability at the time and
the aggregate principal amount of all outstanding Loans (after giving effect to
the Revolving Credit Loans requested or deemed requested) shall not exceed the
Borrowing Base.  It is expressly understood and agreed that the Lenders may and
at present intend to use the Borrowing Base as a maximum ceiling on Loans made
to the Borrowers; provided, however, that it is agreed that should the
aggregate outstanding amount of such Loans exceed the ceiling so determined or
any other limitation set forth in this Agreement, such Loans shall nevertheless
constitute Secured Obligations and, as such, shall be entitled to all benefits
thereof and security therefor.  The principal amount of any Revolving Credit
Loan which is repaid may be reborrowed by the Borrowers, subject to the terms
and conditions of this Agreement, in accordance with the terms of this Section
2.1.  The Administrative Agent's and each Lender's books and records reflecting
the date and the amount of each Revolving Credit Loan and each repayment of
principal thereof shall constitute prima facie evidence of the accuracy of the
information contained therein, subject to the provisions of Section 4.5.

     Section 2.2  Manner of Borrowing.  Borrowings shall be made as follows:

     (a)  Requests for Borrowing.

          (i)  Base Rate Revolving Credit Loans.  A request for the Borrowing
of Base Rate Revolving Credit Loans shall be made, or shall be deemed to be
made, in the following manner:

               (A)  with respect to any Loans to be made on the Effective Date,
which shall be Base Rate Loans, the Borrowers' representative shall give
the Administrative Agent the Initial Notice of Borrowing at least two Business
Days prior to the proposed date of the Borrowing, and, with respect to each
subsequent Borrowing, the Borrowers may request a Base Rate Revolving Credit
Loan by giving the Administrative Agent a Notice of Borrowing, before 1:00 p.m.
on the proposed date of the Borrowing, provided that if such notice is received
after 1:00 p.m. on the proposed date of Borrowing, the proposed Borrowing may
be postponed by the Administrative Agent to the next Business Day;

               (B)  whenever a check or other item is presented to a Disbursing
Bank for payment against a Disbursement Account in an amount greater than the
then available balance in such account, such Disbursing Bank shall, and is
hereby irrevocably authorized by the Borrowers to, give the Administrative
Agent notice thereof, which notice shall be deemed to be a request for a Base
Rate Revolving Credit Loan on the date of such notice in an amount equal to the
excess of such check or other item over such available balance, and such
request shall be irrevocable;

              (C)  unless payment is otherwise made by the Borrowers, the
becoming due of any amount required to be paid under this Agreement or
any of the Notes as interest shall be deemed to be a request for a Base Rate
Revolving Credit Loan on the due date in the amount required to pay such
interest, and such request shall be irrevocable;

              (D)  unless payment is otherwise made by the Borrowers, a
becoming due of any other Secured Obligation shall be deemed to be a
request for a Base Rate Revolving Credit Loan on the due date in the
amount then so due, and such request shall be irrevocable; and

             (E)  the receipt by the Administrative Agent of notification from
FCC to the effect that a payment has been made under a Letter of Credit or
Letter of Credit Guarantee and that the Borrowers have failed to reimburse
FCC therefor in accordance with the terms of Article 3, shall be deemed
to be a request for a Base Rate Revolving Credit Loan on the date such
notification is received in the amount of such payment which is so
unreimbursed.

     (ii)  LIBOR Loans.  At any time after the Effective Date, and so long as
no Default or Event of Default has occurred and is continuing, the Borrowers
may request a LIBOR Loan by giving the Administrative Agent a Notice of
Borrowing (which notice shall be irrevocable) not later than 1:00 p.m. on the
date three Business Days before the day on which the requested LIBOR Loan is
to be made.  The Borrowers may direct the Administrative Agent to apply the
proceeds of a LIBOR Loan to Secured Obligations as described in Sections
2.2(a)(i)(B), (C), (D) and (E) and the Administrative Agent shall comply with
such direction to the extent that proceeds of a Borrowing of LIBOR Loans are
available to be so applied and in such case, no duplicative Borrowing of Base
Rate Revolving Credit Loans will be deemed to have been requested.

     (iii)  Notification of Lenders.  In the case of each LIBOR Loan and,
unless the Administrative Agent and FCC have elected to make a Swingline Loan
to the Borrowers pursuant to Section 2A.2, in the case of each Base Rate Loan,
the Administrative Agent shall promptly notify the Lenders of any Notice of
Borrowing given or deemed given pursuant to this Section 2.2(a) by 12:00 noon
on the proposed Borrowing date (in the case of Base Rate Loans) or by 3:00 p.m.
three Business Days before the proposed Borrowing date (in the case of LIBOR
Loans).  If the Administrative Agent does so notify the Lenders, then not later
than 1:30 p.m. on the proposed Borrowing date, each Lender will make available
to the Administrative Agent, for the account of the Borrowers, at the
Administrative Agent's Office in funds immediately available to the
Administrative Agent, such Lender's Ratable Share of the Base Rate Loan or
LIBOR Loan, as the case may be.

     (b)  Disbursement of Loans.  The Borrowers hereby irrevocably authorize
the Administrative Agent to disburse the proceeds of each Borrowing requested,
or deemed to be requested, pursuant to Section 2.2(a) as follows:

          (i)  the proceeds of each Borrowing requested under Sections 2.2(a)
(i)(A) (other than the Borrowing of any Loans made on the Effective Date) or
(B) or 2.2(a)(ii) shall be disbursed by the Administrative Agent in Dollars in
immediately available funds by wire transfer to a Disbursement Account or, in
the absence of a Disbursement Account, by wire transfer to such other account
as may be agreed upon by the Borrowers and the Administrative Agent from time
to time, and the proceeds of the Loans to be made on the Effective Date under
Section 2.2(a)(i)(A) shall be disbursed in accordance with the Initial Notice
of Borrowing,

          (ii)  the proceeds of each Borrowing deemed requested under Section
2.2(a)(i)(C) or (D) shall be disbursed by the Administrative Agent by way of
direct payment of the relevant Secured Obligation, and

         (iii)  the proceeds of each Borrowing deemed requested under Section
2.2(a)(i)(E) shall be disbursed by the Administrative Agent directly to FCC on
behalf of the Borrowers for application to the Reimbursement Obligations.

     Section 2.3  Repayment; Prepayment.  The Revolving Credit Loans will be
repaid as follows:

     (a)  The outstanding principal amount of all Revolving Credit Loans is due
and payable, and shall be repaid by the Borrowers, as their joint and several
obligation, in full, not later than the Termination Date and the outstanding
principal amount of any Revolving Credit Loan may be repaid by the Borrowers
at any time and from time to time prior to the Termination Date;

     (b)  If at any time the aggregate outstanding unpaid principal amount of
the Revolving Credit Loans exceeds the Borrowing Base in effect at such time,
but subject to the provisions of Section 4.7(d), the Borrowers shall repay the
Revolving Credit Loans in an amount sufficient to reduce the aggregate unpaid
principal amount of the Revolving Credit Loans by an amount equal to such
excess, together with accrued and unpaid interest on the amount so repaid
to the date of repayment; and

     (c)  The Revolving Credit Loans may be prepaid in whole or in part, at any
time and from time to time, on one Business Day's notice, without premium or
penalty.  The Borrowers hereby instruct the Administrative Agent to repay the
Revolving Credit Loans outstanding on any day in an amount equal to the amount
received by the Administrative Agent on such day pursuant to Section 8.1(c);
provided that payments received in excess of outstanding Revolving Credit
Loans or payments received (when no Default or Event of Default exists) on
account of LIBOR Loans which would otherwise result in prepayment of such
LIBOR Loans prior to the end of the Interest Period applicable thereto may,
upon the instructionof the Borrowers to the Administrative Agent not later
than 2:00 p.m. on any Business Day, be applied to the Cash Collateral Account
or any Investment Account.

     Repayments pursuant to Section 2.3(b) or (c) shall be applied first to
the Base Rate Revolving Credit Loans and then to LIBOR Loans.

     Section 2.4  Notes.  Each Lender's Revolving Credit Loans and the joint
and several obligation of the Borrowers to repay such Revolving Credit Loans
shall also be evidenced by a Revolving Credit Note payable to the order of
such Lender.  Each such Note shall be dated the Effective Date (or later
"effective date" under any Assignment and Acceptance) and be duly and validly
executed and delivered by the Borrowers.

     Section 2.5  Reduction and Increase of Commitments.

     (a)  Reduction.

         (i)  The Borrowers shall have the right, at any time and from time to
time, upon at least 30 days' prior irrevocable, written notice to the
Administrative Agent, to reduce permanently and Ratably in whole or in part
the Commitments; provided, however, that any such partial reduction shall be
in an amount equal to $5,000,000 or any larger integral multiple of $1,000,000
and shall not reduce the aggregate Commitments below an amount equal to the sum
of the Letter of Credit Reserve plus the Availability Reserve plus any
Additional Reserves.  As of the date of reduction set forth in such notice,
the Commitments shall be permanently reduced to the amount stated in the
Borrowers' notice (and each Lender's Commitment shall be reduced Ratably) for
all purposes herein, and the Borrowers shall pay the amount necessary to reduce
the amount of the outstanding Loans to any amount that does not exceed the
Borrowing Base (as reduced), together with accrued interest on any amounts so
prepaid, any amount payable pursuant to Section 4.10, and an early termination
fee in an amount equal to 1% of the amount of such reduction if effected prior
to the first anniversary of the Effective Date.

         (ii)   The aggregate Commitments shall be automatically reduced to
zero on the Termination Date.

         (iii)  The aggregate Commitments shall be reduced as provided in
Section 4.9.

         (iv)   The Commitments or any portion thereof terminated or reduced
pursuant to this Section 2.5(a) may not be reinstated.

     (b)  Increase.

         (i)  At any time on or prior to December 31, 2002, the Borrowers may
increase the aggregate amount of the Commitments by an amount not greater than
$50,000,000 and to an amount not greater than $125,000,000 (any such increase,
a "Commitment Increase") by designating either one or more of the existing
Lenders (each of which, in its sole discretion, may determine whether and to
what degree to offer to participate in such Commitment Increase) or one or more
other banks or other financial institutions reasonably acceptable to the
Administrative Agent that at the time agree, in the case of any such bank or
financial institution that is an existing Lender to increase its Commitment (an
"Increasing Lender") and, in the case of any other such bank or financial
institution (an "Additional Lender"), to become a party to this Agreement.
The sum of the increases in the Commitments of the Increasing Lenders pursuant
to this subsection (b) plus the Commitments of the Additional Lenders upon
giving effect to the Commitment Increase shall not in the aggregate exceed the
amount of the Commitment Increase.  The Borrowers shall provide prompt notice
of any proposed Commitment Increase pursuant to this Section 2.5(b) to the
Administrative Agent, which shall promptly provide a copy of such notice to the
Lenders.

         (ii)  Any Commitment Increase shall become effective upon (A) the
receipt by the Administrative Agent of (1) an agreement in form and substance
satisfactory to the Administrative Agent signed by the Borrowers and each other
Loan Party, each Increasing Lender and each Additional Lender, setting forth
the new Commitment of each such Lender and setting forth the agreement of each
Additional Lender to become a party to this Agreement and to be bound by all
the terms and provisions hereof binding upon each Lender, (2) certified copies
of the Commitment Increase Approvals and such opinions of counsel for the
Borrowers with respect to the Commitment Increase as the Administrative Agent
may reasonably request, and (3) a certificate (the statements contained in
which shall be true) of a duly authorized officer of MasTec stating that both
before and after giving effect to such Commitment Increase (x) no Event of
Default has occurred and is continuing, (y) all representations and warranties
made by the Borrowers in this Agreement are true and correct in all materials
respects, and (z) all Commitments Increase Approvals have been obtained and
are in full force and effect, and (B) the funding by each Increasing Lender
and Additional Lender of the Loan(s) to be made by each such Lender described
in paragraph (iii) below.

        (iii)  On the effective date of any Commitment Increase, each
Increasing Lender and each Additional Lender shall (A) automatically and
without further action acquire from each Person who was a Lender immediately
prior to such effectiveness a portion of such Lender's Letter of Credit
Obligations and (B) provide funds to the Administrative Agent, if requested
by the Administrative Agent to do so, in the manner described in Section 2.1
in an amount equal to the product of (x) the ratio (expressed as a percentage)
of the aggregate principal amount of Loans outstanding hereunder immediately
prior to such Commitment Increase, to the Commitments immediately after giving
effect to such Commitment Increase, multiplied by (y) the amount of any such
Increasing Lender's Commitment Increase or such Additional Lender's
Commitment, as the case may be.  The funds so provided by any Lender shall be
deemed to be such Lender's Ratable Share of a Borrowing made on the date of
such Commitment Increase.  The proceeds of the Loans described in the preceding
clause (A) shall be paid by the Administrative Agent to the Persons which were
Lenders immediately prior to the Commitment Increase for application to the
principal amount of Loans held by them, such that after giving effect to such
Commitment Increase and the advances(s) made on the date of such Commitment
Increase, each Loan outstanding hereunder shall consist of advances made by
the Lenders Ratably in accordance with their Ratable Shares of the
Commitments.  If any Commitment Increase results in repayment of any LIBOR
Loan other than on the last day of the Interest Period therefor, the Borrowers
shall pay any amounts due pursuant to Section 4.10.

         (iv)  Notwithstanding any provision contained herein to the contrary,
from and after the date of any Commitment Increase and the making of any
advances on such date pursuant to paragraph (iii) above, calculations and
payments of interest on the Loan shall take into account the actual Commitment
of each Lender and the principal amount outstanding of each advance made by
such Lender during the relevant period of time.

                                  ARTICLE 2A

                              SWINGLINE FACILITY

     Section 2A.1 Swingline Loans. Upon the terms and subject to the conditions
of, and in reliance upon the representations and warranties made under, this
Agreement, the Swingline Lender shall make Swingline Loans to the Borrowers
from time to time, from and after the Effective Date until the Termination
Date, as requested or deemed requested by the Borrowers in accordance with the
terms of Section 2A.2, up to an aggregate principal amount of Swingline Loans
at any time outstanding not to exceed the lesser of (i) the Swingline Facility
and (ii) the Borrowing Base minus the aggregate principal amount of outstanding
Revolving Credit Loans.  The Swingline Loans will be deemed to be usage of the
Revolving Credit Facility for the purpose of calculating availability pursuant
to Section 2.1, but will not reduce the Swingline Lender's obligation to lend
its Ratable Share of the remaining unused Revolving Credit Facility.  The
principal amount of any Swingline Loan which is repaid may be reborrowed by the
Borrowers, subject to the terms and conditions of this Agreement, in accordance
with the terms of this Section 2A.1.

     Section 2A.2  Making Swingline Loans. Requests for Swingline Loans, which
shall be Base Rate Loans and shall not be entitled to be converted into LIBOR
Loans, shall be made not later than 2:00 p.m. on the Business Day of the
proposed Swingline Loan by delivery by telex, telegraph, telecopy or telephone
of a request therefor by MasTec to the Administrative Agent and the Swingline
Lender and shall be deemed to be made on each Settlement Date.  Each such
notice (a "Swingline Loan Request") shall specify (i) the proposed borrowing
date and (ii) the amount of Swingline Loan requested (which, in the case of
deemed Settlement Date requests shall be, respectively, the Settlement Date
and the excess, if any, of the Swingline Facility over the outstanding
principal amount of Swingline Loans on the Settlement Date).  Not later than
3:00 p.m. on the date specified for any Swingline Loan, the Swingline Lender
shall make available such Swingline Loan in immediately available funds to the
Administrative Agent.  After the Administrative Agent's receipt of such funds
and upon fulfillment of the applicable conditions set forth in Article 5, the
Administrative Agent will, and the Borrowers hereby irrevocably authorize the
Administrative Agent to, disburse the proceeds of each Swingline Loan by making
such funds available to the Borrowers by wire transfer to such account of a
Borrower as MasTec and the Administrative Agent may agree from time to time.

     Section 2A.3  Repayment of Swingline Loans.  The outstanding principal
amount of all Swingline Loans is due and payable, and shall be repaid by the
Borrowers, as their joint and several obligation, in full, not later than the
Termination Date, together with accrued and unpaid interest thereon to such
date.

     Section 2A.4  Prepayment.  If at any time the aggregate unpaid principal
amount of Swingline Loans outstanding to the Borrowers from the Swingline
Lender exceeds the amount set forth in the first sentence of Section 2A.1,
the Borrowers shall pay to the Administrative Agent for the account of the
Swingline Lender on demand by the Administrative Agent, an amount equal to
such excess, together with accrued and unpaid interest on the principal amount
prepaid to the date of prepayment. For the avoidance of doubt, notwithstanding
the foregoing, no such prepayment shall be required if the Borrowers shall
have made an appropriate prepayment in accordance with the provisions of
Section 2.3(b).

     Section 2A.5  Swingline Note.  The Swingline Loans made by the Swingline
Lender and the obligation of the Borrowers to repay such Loans shall be
evidenced by, and be repayable in accordance with the terms of, a single
Swingline Note, made by the Borrowers payable to the order of the Swingline
Lender.  The Swingline Note shall be dated the Effective Date and be duly and
validly executed and delivered by the Borrowers.

     Section 2A.6  Settlement with Other Lenders.  All payments of principal,
interest and any other amount with respect to such Swingline Loan shall be
payable to and received by the Administrative Agent for the account of the
Swingline Lender.  Upon demand by the Swingline Lender, with notice thereof to
the Administrative Agent, and notwithstanding the occurrence and continuation
at the time of such demand of any Default or Event of Default, but in any event
not less frequently than every five Business Days, each Lender shall make a
Base Rate Revolving Credit Loan in the amount of its Commitment Percentage of
the outstanding Swingline Loans for the account of the Borrowers or purchase a
participation of such amount in each outstanding Swingline Loan, the proceeds
of which shall be paid over to the Swingline Lender and applied to the
repayment of such Swingline Loans.  Any payments received by the Administrative
Agent prior to such repayment by the Lenders which in accordance with the terms
of this Agreement are to be applied to the reduction of the outstanding
principal balance of Swingline Loans shall be paid over to the Swingline
Lender and so applied.

                                    ARTICLE 3

                           LETTER OF CREDIT GUARANTEES

     Section 3.1  Agreement to Issue.  Upon the terms and subject to the
conditions of, and in reliance upon the representations and warranties made
under, this Agreement,  FCC will issue or cause the issuance of, including by
issuance of Letter of Credit Guarantees, for the account of any Borrower or
Subsidiary one or more Letters of Credit in accordance with this Article 3,
from time to time during the period commencing on the Effective Date and
ending on the Termination Date.

     Section 3.2  Amounts.  FCC shall not have any obligation to issue or
cause the issuance of any Letter of Credit at any time:

     (a)  if, after giving effect to the issuance of the requested Letter of
Credit, (i) the aggregate Letter of Credit Obligations of the Borrowers would
exceed the Letter of Credit Guarantee Facility then in effect or (ii) the
aggregate principal amount of Loans outstanding would exceed the Borrowing
Base (after reduction for the Letter of Credit Reserve in respect of such
Letter of Credit) or (iii) if no Loans are outstanding, the aggregate Letter
of Credit Obligations would exceed the Borrowing Base; or

     (b)  which has an expiration date after the last Business Day that is
more than 30 days prior to the Termination Date.

     Section 3.3  Conditions.  The obligation of FCC to issue any Letter of
Credit Guarantee is subject to the satisfaction of (a) the applicable
conditions precedent contained in Article 5 and (b) the following additional
conditions precedent in a manner satisfactory to the Administrative Agent
and FCC:

         (i)  the Borrowers shall have delivered to FCC and the Administrative
Agent at such times and in such manner as FCC or the Administrative Agent may
prescribe, a Reimbursement Agreement and such other documents as may be
required pursuant to the terms thereof, and the form of the proposed Letter of
Credit, all of which shall be satisfactory in form and substance, as completed,
to the Issuing Bank, FCC and the Administrative Agent; and

         (ii)	as of the date of issuance, no law, rule or regulation, or
order of any court, arbitrator or governmental authority having jurisdiction
or authority over FCC shall purport by its terms to enjoin or restrain FCC or
commercial financing entities, generally, from issuing guarantees, including
guarantees of letter of credit obligations, of the type and in the amount of
the proposed Letter of Credit Guarantee or the proposed Letter of Credit
Guarantee specifically.

     Section 3.4  Issuance of Letter of Credit Guarantees.

     (a)  Request for Issuance.  A Borrower shall give the Issuing Bank, FCC
and the Administrative Agent written notice of such Borrower's request for the
issuance of a Letter of Credit no later than three Business Days prior to the
proposed date of issuance.  Such notice shall be irrevocable and shall be
accompanied by a completed form of letter of credit application in a form
acceptable to the Issuing Bank specifying at least the name of the Subsidiary
(if other than such Borrower) which will appear as the account party on the
face of such Letter of Credit, the original face amount of the Letter of Credit
requested, the effective date (which date shall be a Business Day) of issuance
of such requested Letter of Credit, whether the Letter of Credit may be drawn
in a single or in multiple draws, the date on which such requested Letter of
Credit is to expire (which date shall be a Business Day earlier than the 30th
day prior to the Termination Date), the purpose for which the Letter of Credit
is to be issued and the beneficiary of the Letter of Credit.  The Borrower
shall attach to such notice the form of the Letter of Credit that the Borrower
requests be issued.

     (b)  Responsibilities of the Administrative Agent; Issuance.  The
Administrative Agent shall determine, as of the Business Day immediately
preceding the requested effective date of issuance of a Letter of Credit set
forth in the notice from the Borrowers pursuant to Section 3.4(a), the amount
of Letter of Credit Availability.  If (i) the form of requested Letter of
Credit delivered by the Borrowers to the Administrative Agent is acceptable
to FCC and the Administrative Agent in their sole, reasonable discretion,
(ii) the amount of the Letter of Credit Guarantee necessary to procure the
issuance by the Issuing Bank of such Letter of Credit is less than or equal
to the Letter of Credit Availability and (iii) the Administrative Agent has
received a certificate from the Borrowers stating that the applicable
conditions set forth in Article 5 have been satisfied, then FCC will join in
the application for such Letter of Credit or otherwise cause the Issuing Bank
to issue the requested Letter of Credit.

     (c)  Notice of Issuance.  Promptly after the issuance of any Letter of
Credit supported by a Letter of Credit Guarantee, FCC or the Issuing Bank shall
give the Administrative Agent written or facsimile notice, or telephonic notice
confirmed promptly thereafter in writing, of the issuance of such Letter of
Credit, and the Administrative Agent shall give each Lender a periodic written
eport, not less frequently than monthly, of each such Letter of Credit
outstanding as of the date thereof, the amount available to be drawn thereunder
and the expiration date thereof.

     (d)  No Extension or Amendment.  FCC shall not cause any Letter of Credit
to be extended or amended unless the requirements of this Section 3.4 are met
as though a new Letter of Credit were being requested and issued.

     Section 3.5  Duties of FCC.  The rights and obligations of the Issuing
Bank in connection with any Letter of Credit shall be governed by the
Reimbursement Agreement for such Letter of Credit and in no event shall the
Administrative Agent or any Lender have any liability or obligation to any
Loan Party or its Subsidiaries for any failure or refusal or delay by the
Issuing Bank to issue, or error in issuing, any Letter of Credit.  Any action
taken or omitted to be taken by FCC under or in connection with any Letter of
Credit Guarantee, if taken or omitted in the absence of gross negligence or
willful misconduct, shall not result in any liability of FCC to any Lender or
relieve any Lender of its obligations hereunder to FCC.  In determining
whether to pay under any Letter of Credit Guarantee, FCC shall have no
obligation to confirm that the Issuing Bank acted properly in honoring any
drawing under the related Letter of Credit and shall be entitled to rely on
the Issuing Bank's demand for payment as sufficient evidence of the Issuing
Bank's entitlement thereto.

     Section 3.6  Payment of Reimbursement Obligations.

     (a)  Payment to Issuing Bank, FCC.  Notwithstanding any provisions to the
contrary in any Reimbursement Agreement, the Borrowers agree, jointly and
severally, for the benefit of FCC and the other Lenders, to reimburse the
Issuing Bank for any drawings (whether partial or full) under each Letter of
Credit on demand and agree to pay to the Issuing Bank the amount of all other
Reimbursement Obligations and other amounts payable to the Issuing Bank under
or in connection with such Letter of Credit in accordance with the
Reimbursement Agreement.  If FCC shall pay any amount under any Letter of
Credit Guarantee, the Borrowers shall, jointly and severally, unless the
Borrowers shall have already paid the amount in respect of which payment was
made under such Letter of Credit Guarantee to the Issuing Bank in accordance
with a Reimbursement Agreement, pay to FCC on the first Business Day following
such payment, an amount equal to the amount of the payment made by FCC under
such Letter of Credit Guarantee, together with interest on such amount for
the period from FCC's payment under the applicable Letter of Credit Guarantee,
until repayment in full of such amount, at the interest rate then applicable
to Base Rate Revolving Credit Loans.  So long as FCC remains unpaid, it shall
be subrogated to all rights and remedies of (i) the Issuing Bank under the
related Reimbursement Agreement and (ii) any beneficiary of such Letter of
Credit whose claims against the account party on such Letter of Credit have
been satisfied with proceeds of drawing under such Letter of Credit.

     (b)  Recovery or Avoidance of Payments.  In the event any payment by or
on behalf of the Borrowers with respect to any Letter of Credit (or any
Reimbursement Obligation relating thereto) or any Letter of Credit Guarantee
received by FCC, the Issuing Bank or by the Administrative Agent and
distributed by the Administrative Agent to the Lenders on account of their
respective participations therein, is thereafter set aside, avoided or
recovered from FCC, the Issuing Bank or the Administrative Agent in connection
with any receivership, liquidation or bankruptcy proceeding, the Lenders shall,
upon demand by the Administrative Agent, pay to the Administrative Agent, for
the account of the Administrative Agent, FCC or the Issuing Bank, as the case
may be, their respective Ratable Shares of such amount set aside, avoided or
recovered together with interest at the rate required to be paid by the
Administrative Agent, FCC or the Issuing Bank upon the amount required to be
repaid by it.

     Section 3.7  Participations.

     (a)  Purchase of Participations.  Immediately upon the Effective Date as
to Letters of Credit outstanding on the Effective Date and immediately upon
issuance by the Issuing Bank of any other Letter of Credit, each Lender shall
be deemed to have irrevocably and unconditionally purchased and received
without recourse or warranty, an undivided interest and participation in the
Letter of Credit Obligations thereunder, equal to such Lender's Ratable Share
thereof (including, without limitation, all obligations of the Borrowers with
respect thereto, other than amounts owing to FCC or for the account of the
Issuing Bank under Section 4.2(e), and any security therefor or guaranty or
other supporting obligation pertaining thereto).

     (b)  Sharing of Letter of Credit Payments.  In the event that FCC makes a
payment under any Letter of Credit Guarantee and shall not have been repaid
such amount pursuant to Section 3.6, then the Borrowers shall be deemed to
have requested a Base Rate Revolving Credit Loan in the amount of such payment
and, notwithstanding the occurrence or continuance of a Default or Event of
Default at the time of such payment, each Lender shall be absolutely obligated
to make its Ratable Share of such Loan available to the Administrative Agent
for disbursement as provided by Section 2.2(b) or to purchase a participation
in the payment made by FCC under any such Letter of Credit Guarantee.

     (c)  Sharing of Reimbursement Obligation Payments.  Whenever FCC receives
a payment from or on behalf of the Borrowers or the Issuing Bank on account of
a Reimbursement Obligation as to which the Administrative Agent has previously
received for the account of FCC payment from a Lender pursuant to this Section
3.7, FCC shall promptly pay to the Administrative Agent, for the benefit of
such Lender, such Lender's Ratable Share of the amount of such payment from
the Borrowers or the Issuing Bank in Dollars.  Each such payment shall be made
by FCC on the Business Day on which FCC receives immediately available funds
from the Borrowers or the Issuing Bank pursuant to the immediately preceding
sentence, if received prior to 11:00 a.m. on such Business Day, and otherwise
on the next succeeding Business Day.

     (d)  Documentation.  Upon the request of any Lender, the Administrative
Agent shall furnish to such Lender copies of any Letter of Credit,
Reimbursement Agreement, Letter of Credit Guarantee or application for any
Letter of Credit and such other documentation as to Letters of Credit as may
reasonably be requested by such Lender.

     (e)  Obligations Irrevocable.  The obligations of each Lender to
make payments to the Administrative Agent with respect to any Letter of Credit
or Letter of Credit Guarantee in respect thereof and its participation therein
pursuant to the provisions of this Section 3.7 or otherwise and the obligations
of the Borrowers to make payments to FCC, the Issuing Bank or to the
Administrative Agent, for the account of Lenders, shall be irrevocable,
shall not be subject to any qualification or exception whatsoever and shall be
made in accordance with the terms and conditions of this Agreement (assuming,
in the case of the obligations of the Lenders to make such payments, that the
Letter of Credit has been issued in accordance with Section 3.4), including,
without limitation, any of the following circumstances:

         (i)  Any lack of validity or enforceability of this Agreement or any
of the other Loan Documents;

         (ii)  The existence of any claim, set-off, defense or other right
which the Borrowers (or any of them) may have at any time against a beneficiary
named in a Letter of Credit or any transferee of any Letter of Credit (or any
Person for whom any such transferee may be acting), any Lender, FCC, the
Issuing Bank or any other Person, whether in connection with this Agreement,
any Letter of Credit, the transactions contemplated herein or any unrelated
transactions (including any underlying transactions between the Borrowers or
any other Person and the beneficiary named in any Letter of Credit);

         (iii)  Any draft, certificate or any other document presented under
the Letter of Credit upon which payment has been made in good faith and
according to its terms proving to be forged, fraudulent, invalid or
insufficient in any respect or any statement therein being untrue or
inaccurate in any respect;

         (iv)  The surrender or impairment of any Collateral or any other
security for the Secured Obligations or the performance or observance of any
of the terms of any of the Loan Documents;

          (v)  The occurrence of any Default or Event of Default; or

         (vi)  FCC's, the Issuing Bank's or the Administrative Agent's failure
to deliver the notice provided for in Section 3.4(c).

     Section 3.8  Indemnification, Exoneration.

     (a)  Indemnification.  In addition to amounts payable as elsewhere
provided in this Article 3, the Borrowers, jointly and severally, agree to
protect, indemnify, pay and save harmless the Lenders, FCC, the Issuing Bank
and the Administrative Agent from and against any and all claims, demands,
liabilities, damages, losses, costs, charges and expenses (including
reasonable attorneys' fees) which any Lender, FCC, the Issuing Bank or the
Administrative Agent may incur or be subject to as a consequence, directly or
indirectly, of

         (i)  the issuance of any Letter of Credit, other than as a result of
its gross negligence or willful misconduct, as determined by a court of
competent jurisdiction, or

        (ii)  the failure of the Issuing Bank to honor a drawing under any
Letter of Credit as a result of any act or omission, whether rightful or
wrongful, of any present or future de jure or de facto governmental authority
(all such acts or omissions being hereinafter referred to collectively as
"Government Acts").

     (b)  Assumption of Risk by the Borrowers.  As among the Borrowers, the
Lenders, FCC, the Issuing Bank and the Administrative Agent, the Borrowers
assume all risks of the acts and omissions of, or misuse of any of the
Letters of Credit by, the respective beneficiaries of such Letters of Credit.
In furtherance and not in limitation of the foregoing, subject to the
provisions of the applications for the issuance of Letters of Credit, the
Lenders, FCC, the Issuing Bank and the Administrative Agent shall not be
responsible for:

         (i)  the form, validity, sufficiency, accuracy, genuineness or legal
effect of any document submitted by any Person in connection with the
application for and issuance of and presentation of drafts with respect to any
of the Letters of Credit, even if it should prove to be in any or all respects
invalid, insufficient, inaccurate, fraudulent or forged;

         (ii)   the validity or sufficiency of any instrument transferring or
assigning or purporting to transfer or assign any Letter of Credit or the
rights or benefits thereunder or proceeds thereof, in whole or in part, which
may prove to be invalid or ineffective for any reason;

         (iii)  the failure of the beneficiary of any Letter of Credit to
comply duly with conditions required in order to draw upon such Letter of
Credit;

         (iv)   errors, omissions, interruptions or delays in transmission or
delivery of any messages, by mail, cable, telegraph, telex or otherwise,
whether or not they be in cipher;

         (v)	errors in interpretation of technical terms;

         (vi)   any loss or delay in the transmission or otherwise of any
document required in order to make a drawing under any Letter of Credit or
of the proceeds thereof;

         (vii)  the misapplication by the beneficiary of any Letter of Credit
of the proceeds of any drawing under such Letter of Credit; or

         (viii) any consequences arising from causes beyond the control of the
Lenders, FCC, the Issuing Bank or the Administrative Agent, including, without
limitation, any Government Acts.

None of the foregoing shall affect, impair or prevent the vesting of any of
the Administrative Agent's rights or powers under this Section 3.8.

     (c)  Exoneration.  In furtherance and extension, and not in limitation, of
the specific provisions set forth above, any action taken or omitted by the
Administrative Agent, FCC, the Issuing Bank or any Lender under or in
connection with any of the Letters of Credit or any related certificates, if
taken or omitted in good faith, shall not result in any liability of any
Lender, FCC, the Issuing Bank or the Administrative Agent to the Borrowers or
relieve any Borrower of any of its obligations hereunder to any such Person.

     Section 3.9  Supporting Letter of Credit; Cash Collateral Account.  Upon
the occurrence of an Event of Default or if, notwithstanding the provisions of
Section 3.2(b), any Letter of Credit is outstanding on the Termination Date,
then on or prior to the Termination Date, the Borrowers shall, as their joint
and several obligation, promptly on demand by the Administrative Agent, deposit
with the Administrative Agent, for the Ratable benefit of the Lenders, with
respect to each Letter of Credit then outstanding, as the Administrative Agent
shall specify, either (a) a standby letter of credit (a "Supporting Letter of
Credit") in form and substance satisfactory to the Administrative Agent,
issued by an issuer satisfactory to the Administrative Agent in its sole and
absolute judgment in an amount equal to 105% of the greatest amount for which
such Letter of Credit may be drawn, under which Supporting Letter of Credit
the Administrative Agent shall be entitled to draw amounts necessary to
reimburse the Administrative Agent, FCC and the Lenders for payments made by
the Administrative Agent, FCC or the Lenders under the related Letter of
Credit Guarantee or under any reimbursement or guaranty agreement with respect
thereto, or (b) Cash Collateral in an amount necessary to reimburse the
Administrative Agent, FCC and the Lenders for payments made by the
Administrative Agent, FCC and the Lenders under the related Letter of Credit
Guarantee or under any reimbursement or guaranty agreement with respect
thereto.  Such Supporting Letter of Credit or Cash Collateral shall be held
by the Administrative Agent for the benefit of FCC and the Lenders, as
security for, and to provide for the payment of, the Reimbursement
Obligations.  In addition, the Administrative Agent may at any time after such
Event of Default or the Termination Date apply any or all of such Cash
Collateral to the payment of any or all of the Secured Obligations then due
and payable. The Cash Collateral shall be deposited in the Cash Collateral
Account or an Investment Account and shall be administered in accordance
with the provisions of Section 4.15.

                                  ARTICLE 4

                          GENERAL LOAN PROVISIONS

     Section 4.1  Interest.

     (a)   (i)   Base Rate Revolving Credit Loans.  Subject to the provisions
of Section 4.1(c), the Borrowers will pay interest on the unpaid principal
amount of each Base Rate Revolving Credit Loan, for each day from the day
such Loan is made (or is converted to a Base Rate Loan) until such Loan is
paid (whether at maturity, by reason of acceleration, or otherwise) or is
converted to a LIBOR Loan, at a rate per annum equal to the sum of (i) the
Applicable Margin and (ii) the Base Rate, payable monthly in arrears as it
accrues on each Interest Payment Date.

          (ii)   LIBOR Loans.  Subject to the provisions of Section 4.1(c), the
Borrowers will pay interest on the unpaid principal amount of each LIBOR Loan
for the applicable Interest Period at a rate per annum equal to the sum of (i)
the Applicable Margin and (ii) LIBOR, payable monthly in arrears on each
Interest Payment Date and on the last day of such Interest Period.

          (iii)  Swingline Loans.  Subject to the provisions of Section 4.1(c),
the Borrowers will pay interest on the unpaid principal amount of each
Swingline Loan for each day from the day such Loan is made until such Loan is
paid (whether at maturity, by reason of acceleration or otherwise) at a rate
per annum equal to the sum of (i) the Applicable Margin and (ii) the Base
Rate, payable monthly in arrears as it accrues on each Interest Payment Date.

     (b)  Other Secured Obligations.  The Borrowers will, to the extent
permitted by Applicable Law, pay interest on the unpaid principal amount of
any Secured Obligation that is due and payable other than the Loans in
accordance with Sections 4.1(a) or (c), as applicable, as if such Secured
Obligation were a Base Rate Loan.

     (c)  Default Rate.  If an Event of Default shall occur and be continuing,
at the election of the Required Lenders, the unpaid principal amount of the
Loans and other Secured Obligations shall no longer bear interest in
accordance with the terms of subsection 4.1(a) or (b), as applicable, but
shall bear interest for each day from the date of such Event of Default until
such Event of Default shall have been cured or waived at a rate per annum
equal to the sum of (i) the Default Margin and (ii) the rate otherwise
applicable to such Loan or other Secured Obligation, payable on demand.  The
interest rate provided for in the preceding sentence shall, to the extent
permitted by Applicable Law, apply to and accrue on the amount of any judgment
entered with respect to any Secured Obligation and shall continue to accrue at
such rate during any proceeding described in Section 12.1(g) or (h).

     (d)  Calculation of Interest.  The interest rates provided for in
Sections 4.1(a), (b) and (c) shall be computed on the basis of a year of 360
days and the actual number of days elapsed.  Each interest rate determined
with reference to the Base Rate shall be adjusted automatically as of the
opening of business on the effective date of each change in the Base Rate.

     (e)  Maximum Rate.  It is not intended by the Lenders, and nothing
contained in this Agreement or the Notes shall be deemed, to establish or
require the payment of a rate of interest in excess of the maximum rate
permitted by Applicable Law (the "Maximum Rate").  If, in any month, the
Effective Interest Rate, absent such limitation, would have exceeded the
Maximum Rate, then the Effective Interest Rate for that month shall be the
Maximum Rate, and, if in future months, the Effective Interest Rate would
otherwise be less than the Maximum Rate, then the Effective Interest Rate
shall remain at the Maximum Rate until such time as the amount of interest
paid hereunder equals the amount of interest which would have been paid if
the same had not been limited by the Maximum Rate.  In the event that, upon
payment in full of the Secured Obligations, the total amount of interest paid
or accrued under the terms of this Agreement is less than the total amount of
interest which would have been paid or accrued if the Effective Interest Rate
(without regard to any limitation hereunder) had at all times been in effect,
then the Borrowers shall, to the extent permitted by Applicable Law, pay to
the Lenders an amount equal to the excess, if any, of (i) the lesser of (A)
the amount of interest which would have been charged if the Maximum Rate had,
at all times, been in effect and (B) the amount of interest which would have
accrued had the Effective Interest Rate (without reference to any limitation
hereunder), at all times, been in effect and (ii) the amount of interest
actually paid or accrued under this Agreement.  In the event the Lenders
receive, collect or apply as interest any sum in excess of the Maximum Rate,
such excess amount shall be applied to the reduction of the principal balance
of the Secured Obligations, and if no such principal is then outstanding, such
excess or part thereof remaining, shall be paid to the Borrowers.  For the
purposes of computing the Maximum Rate, to the extent permitted by applicable
law, all interest and charges, discounts, amounts, premiums or fees deemed to
constitute interest under applicable law, shall be amortized, prorated,
allocated and spread in substantially equal parts throughout the full term
of this Agreement.  The provisions of this Section 4.1(e) shall be deemed
to be incorporated into every Loan Document (whether or not any provision
of this Section 4.1(e) is specifically referred to therein).

     Section 4.2  Certain Fees.

     (a)  Unused Commitment Fee.  In connection with and as consideration for
the holding available for the use of the Borrowers hereunder the full amount
of the Commitments, the Borrowers, jointly and severally, will pay a fee to
the Administrative Agent, for the Ratable benefit of the Lenders, for each
day from the Effective Date until the Termination Date, at a rate equal to
0.50% per annum of the Unused Commitments for such day, subject, however to
quarterly adjustment based on the level of Unused Commitments.  Beginning on
the first Margin Adjustment Date and thereafter on each subsequent Margin
Adjustment Date, if the daily average Unused Commitments during the calendar
quarter ended on the preceding day was (i) less than one-third of the
aggregate Commitments, the rate will be 0.375%, (ii) one-third or more but
less than or equal to two-thirds of the aggregate Commitments, the rate will
be 0.50% or (iii) more than two-thirds of the aggregate Commitments, the rate
will be 0.625%.  "Unused Commitments" means an amount equal to the aggregate
Commitments, less the aggregate outstanding principal amount of Loans, other
than any Swingline Loan, less the total amount of Letter of Credit
Obligations, in each case on the date of determination.  Such fee shall be
payable quarterly in arrears on the first day of each January, April,
July and October and on the date of any permanent reduction in the aggregate
Commitments.

     (b)  Other Fees.  As compensation for structuring and arranging the
credit facilities available hereunder and for performing the functions of
an administrative agent hereunder, the Borrowers, jointly and severally,
shall pay to the Administrative Agent, additional fees in accordance with
the provisions of a separate letter agreement between the Borrowers and
the Administrative Agent.

     (c)  Letter of Credit Fees.  The Borrowers, jointly and severally, agree
to pay to the Administrative Agent through its Treasury and International
Services Group:

         (i)  for the Ratable benefit of the Lenders, Letter of Credit fees
on each Letter of Credit or Letter of Credit Guarantee equal to the Applicable
Margin per annum applicable to LIBOR Loans on the date of issuance of such
Letter of Credit and from time to time thereafter (including the Default
Rate, if applicable), payable on the date of issuance for the period from
such date to the next succeeding Interest Payment Date and thereafter monthly
in advance on each Interest Payment Date on the Letter of Credit Amount of
such Letters of Credit outstanding on such Interest Payment Date;

          (ii)  for the account of the Issuing Bank, the standard fees and
charges of the Issuing Bank for issuing, administering, amending, renewing,
paying and canceling and otherwise administering letters of credit, as and
when assessed as to any Letters of Credit; and

          (iii)  for the account of FCC, an additional fronting fee at a
rate of 0.125% per annum of the Letter of Credit Amount of each Letter of
Credit, payable in advance on the date of issuance of each Letter of Credit.

     (d)  General.  All fees provided for in this Section 4.2 and otherwise
in this Agreement or any other Loan Document, shall be fully earned when due
and payable and, except as otherwise set forth herein or required by
applicable law, shall not be subject to refund or rebate.  All such fees
are for compensation for services and are not, and shall not be deemed to
be, interest or a charge for the use of money.  Fees payable pursuant to
the foregoing subsections (a) and (c) shall be calculated based on a year
of 360 days and the actual number of days elapsed.

     Section 4.3  Manner of Payment.

     (a)  Except as otherwise expressly provided in Section 8.1(c), each
payment (including prepayments) by the Borrowers on account of the principal
of or interest on the Loans or of any other amounts payable to the
Administrative Agent or the Lenders under this Agreement or any Note or other
Loan Document shall be made not later than 1:00 p.m. on the date specified for
payment under this Agreement to the Administrative Agent, at the
Administrative Agent's Office, in Dollars, in immediately available funds
and shall be made without any setoff, counterclaim or deduction whatsoever.
Any payment received after such time but before 5:00 p.m. on such day shall
be deemed a payment on such date for the purposes of Section 12.1, but for
all other purposes shall be deemed to have been made on the next succeeding
Business Day.

     (b)  The Borrowers hereby irrevocably authorize each Lender and each
Affiliate of such Lender and each participant herein to charge any account
of a Borrower maintained with such Lender or such Affiliate or participant
with such amounts as may be necessary from time to time to pay any Secured
Obligations (whether or not owed to such Lender, Affiliate or participant)
which are not paid when due.

     Section 4.4  General.  If any payment under this Agreement or any Note
shall be specified to be made on a day which is not a Business Day, it shall
be made on the next succeeding day which is a Business Day and such extension
of time shall in such case be included in computing interest, if any, in
connection with such payment.

     Section 4.5  Loan Accounts; Statements of Account.

     (a)  Each Lender shall open and maintain on its books a loan account in
MasTec's name (each, a "Loan Account" and collectively, the "Loan Accounts").
Each such Loan Account shall show as debits thereto each Loan made under
this Agreement by such Lender to the Borrowers and as credits thereto all
payments received by such Lender and applied to principal of such Loans, so
that the balance of the Loan Account at all times reflects the principal
amount due such Lender from the Borrowers.

     (b)  The Administrative Agent shall maintain on its books a control
account for the Borrowers in which shall be recorded (i) the amount of each
disbursement made hereunder, (ii) the amount of any principal or interest due
or to become due from the Borrowers hereunder, and (iii) the amount of any
sum received by the Administrative Agent hereunder from or on behalf of the
Borrowers and each Lender's share therein.

     (c)  The entries made in the accounts pursuant to subsections (a) and
(b) shall be prima facie evidence, in the absence of manifest error, of the
existence and amounts of the obligations of the Borrowers therein recorded and
in case of discrepancy between such accounts, in the absence of manifest error,
the accounts maintained pursuant to subsection (b) shall be controlling.

     (d) The Administrative Agent will account separately to the Borrowers
monthly with a statement of Loans, charges and payments made to and by the
Borrowers pursuant to this Agreement, and such accounts rendered by the
Administrative Agent shall be deemed final, binding and conclusive, save for
manifest error, unless the Administrative Agent is notified by the Borrowers
in writing to the contrary within 45 days of the date the account to the
Borrowers was so rendered.  Such notice by the Borrowers shall be deemed an
objection to only those items specifically objected to therein.  Failure of
the Administrative Agent to render such account shall in no way affect the
rights of the Administrative Agent or of the Lenders hereunder.

     Section 4.6  Termination of Agreement.  The Borrowers shall have the
right, at any time, to terminate this Agreement upon not less than 30 days'
prior written notice, which notice shall specify the effective date of such
termination.  Upon receipt of such notice, the Administrative Agent shall
promptly notify each Lender thereof.  On the date specified in such notice,
such termination shall be effected, provided, that the Borrowers shall, on or
prior to such date, pay to the Administrative Agent, for its account and the
account of the Lenders, in same day funds, an amount equal to all Secured
Obligations (other than with respect to Letter of Credit Obligations)
outstanding on such date, including, without limitation, all (i) accrued
interest thereon, (ii) all accrued fees provided for hereunder, (iii) any
amounts payable to the Administrative Agent or the Lenders pursuant to
Sections 4.10, 4.15, 15.2, 15.3, 15.14 and 15.23, and, in addition thereto,
shall deliver to the Administrative Agent, in respect of each outstanding
Letter of Credit, at the election of the Administrative Agent, either a
Supporting Letter of Credit or Cash Collateral as provided in Section 3.9,
and (iv) if such termination occurs prior to the first anniversary of the
Effective Date, an early termination fee in an amount equal to 1% of the
amount of the Commitments so terminated.  Additionally, the Borrowers shall
provide the Administrative Agent and the Lenders with an indemnification in
form and substance satisfactory to the Administrative Agent in its reasonable
judgment with respect to collection of uncollected funds credited to the
Borrowers in computing any payoff amount.  Following a notice of termination
as provided for in this Section 4.6(b) and upon payment in full of the amounts
specified in this Section 4.6(b), and execution and delivery of any required
indemnification, this Agreement shall be terminated and the Administrative
Agent, the Lenders and the Borrowers shall have no further obligations to
any other party hereto, except for the obligations to the Administrative
Agent and the Lenders pursuant to Section 15.12 hereof, which shall survive
any termination of this Agreement.

     Section 4.7  Making of Loans.

     (a)  Nature of Obligations of Lenders to Make Loans.  The obligations
of the Lenders under this Agreement to make the Loans are several and are not
joint or joint and several.

     (b)  Assumption by Administrative Agent.  Subject to the provisions of
Section 4.8 and notwithstanding the occurrence or continuance of a Default or
Event of Default or other failure of any condition to the making of Loans
hereunder subsequent to the Loans to be made on the Effective Date, unless
the Administrative Agent shall have received notice from a Lender prior to a
proposed Borrowing date that such Lender will not make available to the
Administrative Agent such Lender's Ratable Share of the Loan to be borrowed
on such date, the Administrative Agent may assume that such Lender will make
such Ratable Share available to the Administrative Agent in accordance with
Section 2.2(a), and the Administrative Agent may, in reliance upon such
assumption, make available to the Borrowers on such date a corresponding
amount.  If and to the extent a Lender shall not make its Ratable Share of
any Loan available to the Administrative Agent, and the Administrative Agent
has made a corresponding amount available to the Borrowers, such Lender, on
the one hand, and the Borrowers, jointly and severally on the other hand,
severally agree to repay to the Administrative Agent forthwith on demand such
corresponding amount (the "Make-Whole Amount"), together with interest thereon
for each day from the date such amount is made available to the Borrowers
until the date such amount is repaid to the Administrative Agent at (i) the
Federal Funds Rate if repaid by the Lender or (ii) the Effective Interest
Rate or, if lower, subject to Section 4.1(e), the Maximum Rate, if repaid by
the Borrowers.  If such Lender shall repay to the Administrative Agent such
corresponding amount, the amount so repaid shall constitute such Lender's
Ratable Share of the Loan made on such Borrowing date for purposes of this
Agreement.  The Administrative Agent shall not be required to make any Loan
as to which it shall have received notice by a Lender of such Lender's
intention not to make its Ratable Share of such Loan available to the
Administrative Agent.  The failure of any Lender to make its Ratable Share
of any Loan available shall not (without regard to whether the Borrowers
shall have returned the amount thereof to the Administrative Agent in
accordance with this Section 4.7) relieve it or any other Lender of its
obligation, if any, hereunder to make its Ratable Share of the Loan available
on such Borrowing date, but no Lender shall be responsible for the failure of
any other Lender to make its Ratable Share of a Loan available on the
Borrowing date.

     (c)  Delegation of Authority to Administrative Agent.  Without limiting
the generality of Section 14.1, each Lender expressly authorizes the
Administrative Agent to determine on behalf of such Lender (i) any reduction
or increase of advance rates applicable to the Borrowing Base, so long as
such advance rates do not at any time exceed the rates set forth in the
Borrowing Base definition (as the same may have been amended and be in effect
on the applicable date), (ii) any adjustment of the Dilution Reserve
consistent with the Administrative Agent's reasonable credit judgment,
(iii) creation or elimination of Additional Reserves, (iv) whether an Account
Debtor's name shall be added to or removed from the list of Approved Account
Debtors and (v) whether or not Accounts shall be deemed to constitute Eligible
Accounts or Eligible Unbilled Accounts, as the case may be.  The
Administrative Agent is further authorized, subject to the applicable
provisions of Section 15.9, (x) to subordinate the Security Interest in
specific items of Equipment to the interest of the owner/lessor thereof or to
the Lien of the holder of a permitted Purchase Money Lien with respect thereto
and (y) to release the Security Interest with respect to property and assets
of the Loan Parties sold, transferred or otherwise disposed of in accordance
with the terms of this Agreement and the other Loan Documents up to $5,000,000
of Collateral in any Fiscal Year.  Any withdrawal of authorization under this
Section 4.7(c) shall not affect the validity of any Loans made prior to the
effectiveness thereof.

     (d)  Overadvances.  Notwithstanding anything to the contrary contained
elsewhere in this Section 4.7 or this Agreement or the other Loan Documents
and whether or not a Default or Event of Default exists at the time, the
Administrative Agent may in its discretion require all Lenders to honor
requests or deemed requests by the Borrowers for Loans at a time that an
Overadvance Condition exists or which would result in an Overadvance Condition
and each Lender shall be obligated to continue to make its Ratable Share of
any such Overadvance Loan up to a maximum amount outstanding equal to its
Commitment, so long as such Overadvance is not known by the Administrative
Agent to exceed $3,000,000 or to exist for more than 10 consecutive Business
Days or more than 30 Business Days in any Fiscal Year.

     Section 4.8  Settlement Among Lenders.

     (a)  Revolving Credit Loans.  It is agreed that each Lender's Net
Outstandings are intended by the Lenders to be equal at all times to such
Lender's Ratable Share of the aggregate principal amount of all Revolving
Credit Loans outstanding.  Notwithstanding such agreement, the several and not
joint obligation of each Lender to make its Ratable Share of Loans in
accordance with the terms of this Agreement and each Lender's right to receive
its Ratable Share of principal payments on Revolving Credit Loans, the Lenders
agree that, in order to facilitate the administration of this Agreement and
the Loan Documents, settlement among them may take place on a periodic basis
in accordance with the provisions of this Section 4.8.

     (b)  Settlement Procedures.  Settlement among the Lenders as to Base Rate
Revolving Credit Loans may occur periodically on Settlement Dates determined
from time to time by the Administrative Agent, which may occur before or after
the occurrence or during the continuance of a Default or Event of Default and
whether or not all of the conditions set forth in Section 5.2 have been met,
provided each Interest Payment Date shall be a Settlement Date and a
Settlement Date shall occur not less often than every fifth Business Day.
Between Settlement Dates, FCC may, if requested to do so by the
Administrative Agent, make non-Ratable Revolving Credit Loans and accept
prepayments of principal thereon solely for its own account subject to each
other Lender's obligation to purchase its Ratable Share of any such non-
Ratable Loan and right to receive its Ratable Share of any net prepayment of
Revolving Credit Loans. On each Settlement Date payments shall be made by or
to FCC and the other Lenders in accordance with the settlement report
delivered by the Administrative Agent in respect of such Settlement Date,
so that as of each Settlement Date, and after giving effect to the
transactions to take place on such Settlement Date, each Lender's Net
Outstandings shall equal such Lender's Ratable Share of the Revolving Credit
Loans.

     (c)  Settlement of Other Secured Obligations.  All other amounts received
by the Administrative Agent on account of, or applied by the Administrative
Agent to the payment of, any Secured Obligation owed to the Lenders
(including, without limitation, fees payable to the Lenders pursuant to
Sections 4.2(b) and (d) and proceeds from the sale of, or other realization
upon, all or any part of the Collateral following an Event of Default) that
are received by the Administrative Agent at or prior to 1:00 p.m. on a
Business Day will be paid by the Administrative Agent to each Lender on the
same Business Day, and any such amounts that are received by the
Administrative Agent after 1:00 p.m. will be paid by the Administrative Agent
to each Lender on the following Business Day.  Unless otherwise stated herein,
the Administrative Agent shall distribute to each Lender such Lender's Ratable
Share of fees payable to the Lenders pursuant to Sections 4.2(b) and (d) and
shall distribute to each Lender such Lender's Ratable Share of the proceeds
from the sale of, or other realization upon, all or any part of the Collateral
following an Event of Default.

     Section 4.9  Mandatory Prepayments.  The Borrowers shall permanently
reduce the Commitments (Ratably) by an amount equal to any amount that would
otherwise constitute "Excess Proceeds" as defined in the Indenture and be
required by the terms thereof to be applied to the prepayment of the
Subordinated Notes.  To the extent necessary to comply with the provisions of
Sections 2.3(b) and 4.6(a) after giving effect to such reduction, the Borrowers
shall also prepay the Loans.  Any such prepayment pursuant to this Section 4.9
shall be applied first to Base Rate Loans to the extent thereof and then to
LIBOR Loans.  If any payments are received which result in prepayment of LIBOR
Loans prior to the end of the applicable Interest Period, the Borrowers shall
also pay any amounts due pursuant to Section 4.10.

     Section 4.10  Payments Not at End of Interest Period; Failure to Borrow.
If for any reason any payment of principal with respect to any LIBOR Loan is
made on any day prior to the last day of the Interest Period applicable to
such LIBOR Loan or, after having given a Notice of Borrowing with respect to
any LIBOR Loan or a Notice of Conversion or Continuation with respect to any
Loan to be continued as or converted into a LIBOR Loan, such Loan is not made
or is not continued as or converted into a LIBOR Loan due to the Borrowers'
failure to borrow or to fulfill the applicable conditions set forth in
Article 5, the Borrowers shall pay to each Lender, an amount equal to such
Lender's costs and expenses incurred as a result of such failure, including
in connection with obtaining deposits to fund its Ratable Share of such new
(or continued or converted) Loan and redeploying such deposits.  The Borrowers
shall pay such amount upon presentation by the Administrative Agent of a
statement setting forth the amount and the applicable Lender's calculation
thereof in reasonable detail, which statement shall be deemed true and correct
absent manifest error.

     Section 4.11  Notice of Conversion or Continuation.  Whenever the
Borrowers desire, subject to the provisions of Sections 4.12 and 4.13, to
convert an outstanding Loan into a Loan or Loans of a different Type or to
continue all or a portion of an outstanding LIBOR Loan for a subsequent
Interest Period, the Borrowers shall notify the Administrative Agent in writing
(which notice shall be irrevocable) by telecopy or electronic mail not later
than 1:00 p.m. on the date two Business Days before the day on which such
proposed conversion or continuation is to be effective (and such effective date
of any continuation shall be the last day of the Interest Period for the
LIBOR Loan).  Each such notice (a "Notice of Conversion or Continuation") shall
(i) identify the Loan to be converted or continued, the aggregate outstanding
principal balance thereof and, if a LIBOR Loan, the last day of the Interest
Period applicable to such Loan, (ii) specify the effective date of such
conversion or continuation, (iii) specify the principal amount of such Loan
to be converted or continued and, if converted, the Type or Types into which
the same is to be converted, and (iv) the Interest Period to be applicable to
the LIBOR Loan as converted or continued, and shall be immediately followed by
a written confirmation thereof by the Borrowers in a form acceptable to the
Administrative Agent, provided that if such written confirmation differs in
any respect from the action taken by the Lenders, the records of the
Administrative Agent shall control absent manifest error.

     Section 4.12  Conversion or Continuation.  Provided that no Event of
Default shall have occurred and be continuing (but subject to the provisions
of Sections 4.11 and 4.13), the Borrowers may request that all or any part of
any outstanding Loan be converted into a Loan or Loans of a different Type or
be continued as a Loan or Loans of the same Type, in the same aggregate
principal amount, on any Business Day (which, in the case of continuation of
a LIBOR Loan, shall be the last day of the Interest Period applicable to such
Loan), upon notice (which notice shall be irrevocable) given in accordance
with Section 4.11.

     Section 4.13  Duration of Interest Periods; Maximum Number of LIBOR
Loans; Minimum Increments.

     (a)  Subject to the provisions of the definition "Interest Period,"
the duration of each Interest Period applicable to a LIBOR Loan shall be as
specified in the applicable Notice of Borrowing or Notice of Conversion or
Continuation.  The Borrowers may elect a subsequent Interest Period to be
applicable to any LIBOR Loan by giving a Notice of Conversion or Continuation
with respect to such Loan in accordance with Section 4.11.

     (b)  If the Administrative Agent does not receive a notice of election in
accordance with Section 4.11 with respect to the continuation of LIBOR Loan
within the applicable time limits specified in said Section 4.11, or if, when
such notice must be given, an Event of Default exists or such type of Loan is
not available, the Borrowers shall be deemed to have elected to convert such
LIBOR Loan in whole into a Base Rate Loan on the last day of the Interest
Period therefor.

     (c)  Notwithstanding the foregoing, the Borrowers may not select an
Interest Period that would end, but for the provisions of the definition
"Interest Period," after the Termination Date.

     (d)  In no event shall there be more than seven LIBOR Loans outstanding
hereunder at any time.  For the purpose of this subsection (d), each Loan
having a distinct Interest Period shall be deemed to be a separate Loan
hereunder.

     (e)  Each LIBOR Loan shall be in a minimum amount of $1,000,000 or an
integral multiple of $100,000 in excess thereof.

    Section 4.14  Changed Circumstances.

     (a)  If the introduction of or any change in or in the interpretation of
(in each case, after the date hereof) any law or regulation makes it unlawful,
or any governmental authority asserts, after the date hereof, that it is
unlawful, for any Lender to perform its obligations hereunder to make LIBOR
Loans or to fund or maintain LIBOR Loans hereunder, such Lender shall notify
the Administrative Agent of such event and the Administrative Agent shall
notify the Borrowers of such event, and the right of the Borrowers to select
LIBOR Loans for any subsequent Interest Period or in connection with any
subsequent conversion of any Loan shall be suspended until the Administrative
Agent shall notify the Borrowers that the circumstances causing such
suspension no longer exist, and the Borrowers shall forthwith prepay
in full all LIBOR Loans then outstanding and shall pay all interest accrued
thereon through the date of such prepayment or conversion, unless the
Borrowers, within three Business Days after such notice from the
Administrative Agent, request the conversion of all LIBOR Loans then
outstanding into Base Rate Loans; provided, that if the date of such
repayment or proposed conversion is not the last day of the Interest Period
applicable to such LIBOR Loans, the Borrowers shall also pay any amount due
pursuant to Section 4.10.

     (b)  If the Administrative Agent shall, at least one Business Day before
the date of any requested Borrowing or the effective date of any conversion or
continuation of an existing Loan to be made or continued as or converted into
a LIBOR Loan (each such requested Borrowing made and Loan to be converted or
continued, a "Pending Loan"), notify the Borrowers that the LIBOR will not
adequately reflect the cost to the Lenders of making or funding such Pending
Loan as a LIBOR Loan or that LIBOR is not determinable from any interest rate
reporting service of recognized standing, then the right of the Borrowers to
select a LIBOR Loan for such Pending Loan, any subsequent Loan or in
connection with any subsequent conversion or continuation of any Loan shall
be suspended until the Administrative Agent shall notify the Borrowers that
the circumstances causing such suspension no longer exist, and each Pending
Loan and each such subsequent Loan requested to be made, continued or converted
shall be made or continued as or converted into a Base Rate Loan.

     Section 4.15  Increased Capital.  If any Lender shall have determined
that the adoption of any applicable law, rule, regulation, guideline,
directive or request (whether or not having force of law) regarding capital
requirements for banks or bank holding companies, or any change therein or
in the interpretation or administration thereof by any governmental authority,
central bank or comparable agency charged with the interpretation or
administration thereof, in each case after the Agreement Date, or compliance
by such Lender with any of the foregoing, imposes or increases a requirement
by such Lender to allocate capital resources to such Lender's Commitment to
make Loans hereunder which has or would have the effect of reducing the return
on such Lender's capital to a level below that which such Lender could have
achieved (taking into consideration such Lender's then existing policies with
respect to capital adequacy and assuming full utilization of such Lender's
capital) but for such adoption, change or compliance by any amount deemed by
such Lender to be material:  (i) such Lender shall promptly after its
determination of such occurrence give notice thereof to the Borrower; and
(ii) the Borrowers shall pay to such Lender as an additional fee from time
to time on demand such amount as such Lender certifies to be the amount that
will compensate it for such reduction.  A certificate of such Lender claiming
compensation under this Section 4.15 shall be conclusive in the absence of
manifest error.  Such certificate shall set forth the nature of the occurrence
giving rise to such compensation, the additional amount or amounts to be paid
to it hereunder and the method by which such amounts were determined.  In
determining such amount, such Lender may use any reasonable averaging and
attribution methods.

     Section 4.16  Net Payments.

     (a)  No Reduction for Taxes.  All payments by the Borrowers hereunder to
or for the benefit of any Lender or the Administrative Agent shall be made
without setoff, counterclaim or other defense.  Except as required by law or
as provided in Section 4.16(b), all such payments will be made free and clear
of, and without deduction or withholding for, any present or future taxes,
levies, imposts, duties, fees, assessments, or other charges of whatever nature
now or hereafter imposed by any jurisdiction or by any political subdivision
or taxing authority thereof or therein with respect to such payments (excluding
any tax imposed on or measured by the net income or profits of such Lender or
the Administrative Agent, as the case may be together with all interest,
penalties or similar liabilities with respect thereto (collectively, "Covered
Taxes").  Except as provided in Section 4.16(b), if the Borrowers shall be
required by law to deduct or withhold any Covered Taxes from any sum payable
hereunder to any Lender or the Administrative Agent, (A) the sum payable shall
be increased as may be necessary so that after making all required deductions
or withholdings of Covered Taxes (including deductions or withholdings of
Covered Taxes applicable to additional sums payable under this Section 4.16(a))
such Lender or the Administrative Agent, as the case may be, receives an amount
equal to the sum it would have received had such deductions or withholdings not
been made, (B) the Borrowers shall make such deductions or withholdings, and
(C) the Borrowers shall pay the full amount so deducted or withheld to the
relevant taxing authority or other authority in accordance with Applicable
Law.  The Borrowers shall furnish to the Administrative Agent within 45 days
after the date on which the payment of any Covered Taxes is due certified
copies of tax receipts evidencing such payment by the Borrowers.  Except as
provided in Section 4.16(b), the Borrowers agree to indemnify and hold
harmless the Lenders and the Administrative Agent and reimburse each of them,
as the case may be, for the amount of any Covered Taxes that are levied
against or imposed on the Lenders or the Administrative Agent and that are
paid by the Lenders or the Administrative Agent, as the case may be.

     (b)  Foreign Lenders.

         (i)   Each Foreign Lender shall deliver to the Administrative Agent
and the Borrowers (A) two valid, duly completed copies of IRS Form W-8BEN or
Form W-8ECI or applicable successor form, as the case may be, and any other
required form, certifying in each case that such Foreign Lender is entitled
to receive payments under this Agreement or the Note(s) payable to it without
deduction or withholding of any United States federal income taxes or, in the
case of a Foreign Lender claiming exemption from withholding under Section
871(b) or 881(c) of the Code, a certificate to such effect and a valid, duly
completed IRS Form W-8BEN or applicable successor form, to establish an
exemption from United States backup withholding tax.  Each such Foreign
Lender shall also deliver to the Administrative Agent and the Borrowers such
forms, or other manner of required certification, on or before the date that
any such form expires or becomes obsolete or otherwise is required to be
resubmitted as a condition to obtaining an exemption from a required
withholding of United States federal income tax or after the occurrence of
any event requiring a change in the most recent form previously delivered by
it to the Borrowers and the Administrative Agent, and such extensions or
renewals thereof as may reasonably be requested by the Borrowers and the
Administrative Agent.

         (ii)  If the forms provided by a Foreign Lender under Section
4.16(b)(i) at the time such Foreign Lender first becomes a party to this
Agreement indicate that such Foreign Lender is subject to a rate of United
States withholding tax in excess of zero, then withholding tax at such rate
shall be considered excluded from Covered Taxes unless and until such Foreign
Lender provides the appropriate forms certifying that a lesser rate of
withholding applies, whereupon withholding tax at such lesser rate only
shall be excluded from Covered Taxes for period governed by such forms.

        (iii)  For any period with respect to which a Foreign Lender has failed
to provide the Borrowers with the appropriate forms described in Section
4.16(b)(i), such Foreign Lender shall not be entitled to indemnification under
Section 4.16(a) with respect to Covered Taxes imposed by the United States by
reason of such failure.

     (c)  Affected Lenders.  If the Borrowers are obligated to pay to any
Lender any amount under Section 4.15 or this Section 4.16, the Borrowers may,
if no Default or Event of Default then exists, replace such Lender with
another lender acceptable to the Administrative Agent, and such Lender hereby
agrees to be so replaced subject to the following:

         (i)   The obligations of the Borrowers hereunder to the Lender to be
replaced (including such increased or additional costs incurred from the date
of notice to the Borrowers of such increase or additional costs through the
date such Lender is replaced hereunder) shall be paid in full to such Lender
concurrently with such replacement;

         (ii)  The replacement Lender shall be a bank or other financial
institution that is not subject to the increased costs which caused the
Borrowers' election to replace any Lender hereunder, and each such replacement
Lender shall execute and deliver to the Administrative Agent such
documentation satisfactory to the Administrative Agent pursuant to which such
replacement Lender is to become a party hereto, conforming to the provisions
of Section 13.1 hereof, with a Commitment equal to that of the Lender being
replaced and shall make Revolving Credit Loans in the aggregate principal
amount equal to the aggregate outstanding principal amount of the Revolving
Credit Loans of the Lender being replaced;

         (iii) Upon such execution of such documents referred to in clause (ii)
and repayment of the amounts referred to in clause (i), the replacement Lender
shall be a "Lender" with a Commitment as specified hereinabove and the Lender
being replaced shall cease to be a "Lender" hereunder, except with respect to
indemnification provisions under this Agreement, which shall survive as to such
replaced Lender;

         (iv)  The Administrative Agent shall reasonably cooperate in
effectuating the replacement of any Lender under this Section 4.16, but at no
time shall the Administrative Agent be obligated to initiate any such
replacement;

         (v)   Any Lender replaced under this Section 4.16 shall be replaced at
the Borrowers' sole cost and expense and at no cost or expense to the
Administrative Agent or any of the Lenders; and

         (vi)  If the Borrowers propose to replace any Lender pursuant to this
Section 4.16 because the Lender seeks reimbursement hereunder, then the
Borrowers must also replace any other Lender who seeks similar levels of
reimbursement (as a percentage of such Lender's Commitment) under such
Sections.

        (vii)  Each Lender agrees that to the extent requested by MasTec and
not inconsistent with such Lender's internal policies, such Lender shall use
reasonable efforts and take such actions as are reasonably appropriate if as a
result thereof the additional fees or amounts which would otherwise be
required to be paid to such Lender pursuant to Section 4.14, 4.15 or 4.16
would be materially reduced, or the illegality or other adverse circumstances
which would otherwise require a conversion of such Loans would cease to exist,
and in each case, if as determined by such Lender in its discretion, the
taking of such actions would not adversely affect such Lender or the Loans or
otherwise be disadvantageous to such Lender.  To the extent practicable and
applicable, each Lender shall allocate such cost increases among its customers
in good faith and on an equitable basis.

     Section 4.17  Cash Collateral Account; Investment Accounts.

     (a)  Cash Collateral Account.  The Borrowers shall establish a Cash
Collateral Account in which to deposit Collateral consisting of cash or Cash
Equivalents from time to time

         (i)   representing payments received pursuant to Section 2.3(c) in
excess of then outstanding Loans or on account of LIBOR Loans which would
otherwise result in repayment of such Loans prior to the end of the Interest
Period applicable thereto,

         (ii)  with respect to Letter of Credit Obligations (x) at the request
of the Administrative Agent upon the occurrence of an Event of Default, or (y)
for the purposes set forth in Section 4.6 in the event of termination of this
Agreement, or

        (iii)  for any other purpose as may be agreed between the
Administrative Agent and the Borrowers to provide security for the Secured
Obligations.

On the last day of the applicable Interest Period as to any amounts deposited
to the Cash Collateral Account pursuant to clause (i) above or if a drawing
under a Letter of Credit occurs with respect to any amounts deposited to the
Cash Collateral Account pursuant to clause (ii) above, the Borrowers hereby
authorize the Administrative Agent to use the monies deposited in the Cash
Collateral Account to make payment to the payee with respect to such Loan or
drawing.  The Cash Collateral Account shall be in the name of MasTec and the
Administrative Agent shall have sole dominion and control over, and sole
access to, the Cash Collateral Account.  Neither any Borrower nor any Person
claiming on behalf of or through any Borrower shall have any right to withdraw
any of the funds held in the Cash Collateral Account.  The Borrowers agree
that they will not at any time (x) sell or otherwise dispose of any interest
in the Cash Collateral Account or any funds held therein or (y) create or
permit to exist any Lien upon or with respect to the Cash Collateral Account
or any funds held therein, except as provided in or contemplated by this
Agreement.  The Administrative Agent shall exercise reasonable care in the
custody and preservation of any funds held in the Cash Collateral Account and
shall be deemed to have exercised such care if such funds are accorded
treatment substantially equivalent to that which the Administrative Agent
accords other funds deposited with the Administrative Agent, it being
understood that the Administrative Agent shall not have any responsibility
for taking any necessary steps to preserve rights against any parties with
respect to any funds held in the Cash Collateral Account.  Subject to the
right of the Administrative Agent to withdraw funds from the Cash Collateral
Account as provided herein, the Administrative Agent will, so long as no
Default or Event of Default shall have occurred and be continuing, from time
to time invest funds on deposit in the Cash Collateral Account, reinvest
proceeds of any such investments which may mature or be sold, and invest
interest or other income received from any such investments, in each case, in
Cash Equivalents, as the Borrowers may direct prior to the occurrence of a
Default or Event of Default and as the Administrative Agent may select after
the occurrence and during the continuance of a Default or Event of Default.
Such proceeds, interest and income which are not so invested or reinvested in
Cash Equivalents shall be deposited and held by the Administrative Agent in
the Cash Collateral Account.  The Administrative Agent makes no representation
or warranty as to, and shall not be responsible for, the rate of return, if
any, earned in any Cash Collateral.  Any earnings on Cash Collateral shall be
held as additional Cash Collateral on the terms set forth in this Section 4.17.

     (b)  Investment Accounts.  The Borrowers may from time to time establish
one or more Investment Accounts with the Administrative Agent, any Lender or
any Affiliate of a Lender, for the purpose of investing in Cash Equivalents
any Cash Collateral representing payments received pursuant to Section 2.3(c)
in excess of then outstanding Loans or on account of LIBOR Loans which would
otherwise result in repayment of such Loans prior to the end of the Interest
Period applicable thereto.  The Borrowers hereby acknowledge and agree that
each such Investment Account shall constitute Collateral hereunder and shall
be maintained with the Administrative Agent, a Lender or Affiliate of a Lender
as security for the Secured Obligations.  Notwithstanding the foregoing, until
such time as the Administrative Agent shall otherwise instruct the Lender or
the Affiliate of a Lender maintaining such account, the Borrowers shall be
entitled to direct the investment of the funds deposited therein.  The
Borrowers agree that they will not at any time (x) sell or otherwise dispose
of any interest in any Investment Account or any funds held therein other
than by application thereof to any Secured Obligation, or (y) create or permit
to exist any Lien upon or with respect to any Investment Account or any funds
held therein, except as provided in or contemplated by this Agreement.  The
Borrowers agree that at any time, and from time to time, at the expense of the
Borrowers, the Borrowers will promptly execute and deliver all further
instruments and documents, and take all further action, that may be
necessary or desirable, or that the Administrative Agent or any Lender may
request, in order to perfect and protect any security interest in any
Investment Account granted or purported to be granted hereby or to enable the
Borrowers, for their respective benefit and the benefit of the Lenders, to
exercise and enforce its rights and remedies hereunder with respect to such
Investment Account.

     Section 4.18  Allocation of Payments from Borrowers.  All monies to be
applied to the Secured Obligations, whether such monies represent voluntary
payments by the Borrowers or are received pursuant to demand for payment or
realized from any disposition of Collateral, shall be allocated among the
Administrative Agent and such of the Lenders and other holders of the Secured
Obligations as are entitled thereto (and, with respect to monies allocated to
the Lenders, on a Ratable basis unless otherwise provided in this Section
4.18): (i) first, to the Swingline Lender (or to any Lender to the extent
such Lender has previously repaid such Loan) to pay principal and accrued
interest on any portion of any Swingline Loan; (ii) second, to the
Administrative Agent to pay the amount of expenses that have not been
reimbursed to the Administrative Agent by the Borrowers or the Lenders,
together with interest accrued thereon; (iii) third, to the Administrative
Agent to pay any indemnified amount that has not been paid to the
Administrative Agent by the Borrowers or the Lenders, together with interest
accrued thereon; (iv) fourth, to the Administrative Agent to pay any fees due
and payable to the Administrative Agent under this Agreement; (v) fifth, to
the Lenders for any indemnified amount that they have paid to the
Administrative Agent and for any expenses that they have reimbursed to the
Administrative Agent; (vi) sixth, to the Lenders to pay any fees due and
payable to the Lenders under this Agreement; (vii) seventh, in payment of
(A) the unpaid principal and accrued interest in respect of the Loans and
(B) any other Secured Obligations then outstanding and held by any Lender to
be shared among the Lenders on a pro rata basis according to the outstanding
Secured Obligations then owing to each Lender expressed as a percentage of the
outstanding Secured Obligations then owing to all Lenders, or on such other
basis as may be agreed upon in writing by all of the Lenders (which agreement
or agreements may be entered into without notice to or the consent or
approval of the Borrowers); and (vii) eight, to the holders of the other
Secured Obligations who are not Lenders on a pro rata basis.  The allocations
set forth in this Section 4.18 are solely to determine the rights and
priorities of the Administrative Agent and the Lenders as among themselves
and may be changed by the Administrative Agent and the Lenders without notice
to or the consent or approval of the Borrowers or any other Person.

     Section 4.19  Borrowers' Representative.  MasTec shall act under this
Agreement as the representative of all Borrowers, and each other Borrower
hereby appoints MasTec as its representative hereunder for all purposes,
including, without being limited to, requesting borrowings and receiving
account statements and other notices and communications to the Borrowers (or
any of them) from the Administrative Agent or any Lender.  The Administrative
Agent and the Lenders may rely, and shall be fully protected in relying, on any
request for borrowing, disbursement instruction, report, information or any
other notice or communication made or given by MasTec, whether in its own name,
on behalf of any other Borrower or on behalf of "the Borrowers," and neither
the Administrative Agent nor any Lender shall have any obligation to make any
inquiry or request any confirmation from or on behalf of any other Borrower as
to the binding effect on it of any such request, instruction, report,
information, notice or communication, nor shall the joint and several character
of the Borrowers' liability for the Secured Obligations be affected.  The
Administrative Agent and each Lender intend to maintain a single Loan Account
in the name of "MasTec, Inc." hereunder and each Borrower expressly agrees to
such arrangement and confirms that such arrangement shall have no effect on
the joint and several character of its liability for the Secured Obligations.

     Section 4.20  Joint and Several Liability.

     (a)  Joint and Several Liability.  The Secured Obligations shall
constitute one joint and several direct and general obligation of all of the
Borrowers.  Notwithstanding anything to the contrary contained herein, each of
the Borrowers shall be jointly and severally, with each other Borrower,
directly and unconditionally liable to the Administrative Agent and the Lenders
for all Secured Obligations and shall have the obligations of co-maker with
respect to the Loans, the Notes, and the Secured Obligations, it being agreed
that the advances to each Borrower inure to the benefit of all Borrowers, and
that the Administrative Agent and the Lenders are relying on the joint and
several liability of the Borrowers as co-makers in extending the Loans
hereunder.  Each Borrower hereby unconditionally and irrevocably agrees that
upon default in the payment when due (whether at stated maturity, by
acceleration or otherwise) of any principal of, or interest on, any Loan or
other Secured Obligation payable to the Administrative Agent or any Lender,
it will forthwith pay the same, without notice or demand.

     (b)  No Modification or Release of Obligations.  No payment or payments
made by any of the Borrowers or any other Person or received or collected by
the Administrative Agent or any Lender from any of the Borrowers or any other
Person by virtue of any action or proceeding or any set-off or appropriation
or application at any time or from time to time in reduction of or in payment
of the Secured Obligations shall be deemed (except to the extent Secured
Obligations are satisfied) to modify, release or otherwise affect the
liability of each Borrower under this Agreement, which shall remain liable
for the Secured Obligations until the Secured Obligations are paid in full
and the Commitments are terminated.

    Section 4.21  Obligations Absolute.  Each Borrower agrees that the Secured
Obligations will be paid strictly in accordance with the terms of the Loan
Documents, regardless of any law, regulation or order now or hereafter in
effect in any jurisdiction affecting any of such terms or the rights of the
Administrative Agent or any Lender with respect thereto.  All Secured
Obligations shall be conclusively presumed to have been created in reliance
hereon.  The liabilities under this Agreement shall be absolute and
unconditional irrespective of:

     (a)  any lack of validity or enforceability of any Loan Documents or
any other agreement or instrument relating thereto;

     (b)  any change in the time, manner or place of payments of, or in any
other term of, all or any part of the Secured Obligations, or any other
amendment or waiver thereof or any consent to departure therefrom, including,
but not limited to, any increase in the Secured Obligations resulting from the
extension of additional credit to any Borrower or otherwise;

     (c)  any taking, exchange, release or non-perfection of any collateral,
or any release or amendment or waiver of or consent to departure from any
guaranty for all or any of the Secured Obligations;

     (d)  any change, restructuring or termination of the corporate structure
or existence of any Borrower; or

     (e)  any other circumstance which might otherwise constitute a defense
available to, or a discharge of, any Borrower or a guarantor.

This Agreement shall continue to be effective or be reinstated, as the case
may be, if at any time any payment of any of the Secured Obligations is
rescinded or must otherwise be returned by the Administrative Agent or any
Lender upon the insolvency, bankruptcy or reorganization of any Borrower or
otherwise, all as though such payment had not been made.

     Section 4.22  Waiver of Suretyship Defenses.  Each Borrower agrees that
the joint and several liability of the Borrowers provided for in Section 4.20
shall not be impaired or affected by any modification, supplement, extension
or amendment or any contract or agreement to which the other Borrowers may
hereafter agree (other than an agreement signed by the Administrative Agent
and the Lenders specifically releasing such liability), nor by any delay,
extension of time, renewal, compromise or other indulgence granted by the
Administrative Agent or any Lender with respect to any of the Secured
Obligations, nor by any other agreements or arrangements whatever with the
other Borrowers or with anyone else, each Borrower hereby waiving all notice
of such delay, extension, release, substitution, renewal, compromise or other
indulgence, and hereby consenting to be bound thereby as fully and effectually
as if it had expressly agreed thereto in advance.  The liability of each
Borrower is direct and unconditional as to all of the Secured Obligations,
and may be enforced without requiring the Administrative Agent or any Lender
first to resort to any other right, remedy or security.  Each Borrower hereby
expressly waives promptness, diligence, notice of acceptance and any other
notice with respect to any of the Secured Obligations, the Notes, this
Agreement or any other Loan Document (other than notices expressly required in
this Agreement or by any of the Loan Documents) and any requirement that the
Administrative Agent or any Lender protect, secure, perfect or insure any
Lien or any property subject thereto or exhaust any right or take any action
against any Borrower or any other Person or any collateral, including any
rights any Borrower may otherwise have under O.C.G.A.SS10-7-23 and 10-7-24.

                                    ARTICLE 5

                               CONDITIONS PRECEDENT

     Section 5.1  Conditions Precedent to Initial Loans.  Notwithstanding any
other provision of this Agreement, the Lenders shall not have any obligation
to make any Loans nor shall FCC have any obligation to cause any Letter of
Credit to be issued on the Effective Date unless and until the following
conditions precedent are satisfied:

     (a)  Documents.  The Administrative Agent shall have received on or before
the Effective Date the following, each in form and substance satisfactory to
the Administrative Agent, its special counsel and the Lenders and (except for
the Notes) in sufficient copies for each Lender:

          (1)  Agreement.  This Agreement, duly executed and delivered by the
Borrowers and the other Lenders;

          (2)  Notes.  The Notes, each dated the Effective Date and duly
executed and delivered by the Borrowers;

          (3)  Articles, Bylaws and Resolutions.  A certificate, dated the
Effective Date, of the Secretary or an Assistant Secretary of each Loan Party,
as to and having attached thereto copies of the articles of incorporation and
by-laws and shareholder agreements of such Loan Party as in effect on the
Effective Date and all corporate action, including shareholder approval, if
necessary, taken by such Loan Party and/or its shareholders to authorize the
execution, delivery and performance of this Agreement and the other Loan
Documents to which such Loan Party is a party and, in the case of each
Borrower, the Borrowings under this Agreement;

          (4)  Incumbency Certificates.  A certificate, dated the Effective
Date, of the Secretary or an Assistant Secretary of each Loan Party, as to
the incumbency and specimen signatures of each of the officers of such Loan
Party who is authorized to execute and deliver this Agreement or any other
Loan Document on behalf of such Loan Party or any document, certificate or
instrument to be delivered in connection with this Agreement or the other
Loan Documents to which such Loan Party is a party and, in the case of each
Borrower, to request Borrowings under this Agreement;

          (5)  Good Standing Certificates.  A certificate as of a recent date
evidencing the good standing of each Loan Party in the jurisdiction of its
incorporation and in each other jurisdiction in which it is qualified as a
foreign corporation to transact business;

          (6)  Financing Statements.  The Financing Statements to be filed
and evidence satisfactory to the Administrative Agent that the Financing
Statements have been filed in each jurisdiction where such filing may be
necessary or appropriate to perfect the Security Interest or, at the
Administrative Agent's discretion, in appropriate form for such filing;

          (7)  Landlord's Waiver.  Landlord's waiver and consent agreements
duly executed on behalf of each landlord of real property on which any
material Collateral is located as requested by the Administrative Agent,
that is not included in the Rent Reserve;

          (8)  Schedules of Inventory and Accounts.  A summary Schedule of
Inventory and a Schedule of Accounts, each prepared as of November 30, 2001;

          (9)  Insurance Coverage.  Certificates or binders of insurance
relating to each of the policies of insurance covering any of the Collateral
together with loss payable clauses which comply with the terms of Section
8.8(b);

          (10) Borrowing Base Certificate.  A Borrowing Base Certificate
prepared as of November 30, 2001, duly executed and delivered by the Financial
Officer demonstrating Availability of not less than $22,500,000, after giving
effect to the Loans to be made on the Effective Date and any transactions
contemplated by this Agreement to occur on or before the Effective Date;

          (11) Notice of Borrowing.  The Initial Notice of Borrowing dated the
Effective Date from the Borrowers to the Administrative Agent requesting the
Loans to be made on the Effective Date and specifying the method of
disbursement;

          (12) Financial Statements.  Copies of all the financial statements
referred to in Section 6.1(n) and meeting the requirements thereof;

          (13) Officer's Certificate.  A certificate of the President or a
Vice President of MasTec stating that, to the best of his or her knowledge and
based on an examination sufficient to enable him or her to make an informed
statement, (a) all of the representations and warranties made or deemed to be
made under this Agreement are true and correct as of the Effective Date, both
with and without giving effect to the Loans to be made on the Effective Date
and the application of the proceeds thereof, and (b) as of the Effective Date,
no Default or Event of Default exists;

          (14) Appraisal.  An appraisal of the value of the Equipment of the
Loan Parties, satisfactory to the Administrative Agent;

          (15) Subordinated Notes.  Evidence satisfactory to the
Administrative Agent (which may be a legal opinion) that the Secured
Obligations will constitute "Designated Senior Debt" for purposes of and as
defined in the Indenture;

          (16) Factual Certificate.  A certification from an appropriate
officer of each Borrower as to such factual matters as shall be required
by the Administrative Agent;

          (17) Payoff Letter.  A payoff letter with respect to the
obligations outstanding under and the commitments under the Existing Loan
Agreement and confirming, among other things, the absence of permanent
reductions in the facility available thereunder;

          (18) Intercreditor Agreement.  An intercreditor agreement duly
executed and delivered by Liberty Mutual Bond Services, Inc. (and any other
surety) and MasTec, or other evidence satisfactory to the Administrative
Agent that no issuer of surety bonds for the account of any Loan Party claims
a Lien on property of any Loan Party other than the bonded contract, proceeds
thereof and materials used in performance of such bonded contract;

          (19) Mortgages.  Mortgages, encumbering the Real Estate located at
3155 N.W. 77th Avenue, Miami, Florida, 209 Art Bryan Drive, Asheboro, North
Carolina, and Highway #2 East, Shevlin, Minnesota;

          (20) Title Certificates.  An appropriate officer or senior employee
of MasTec, acceptable to the Administrative Agent, shall have entered into a
limited agency agreement with the Administrative Agent in respect of all title
certificates, in form and substance satisfactory to the Administrative Agent,
and the Administrative Agent shall be satisfied that certificates of title for
all Equipment Collateral for which certificates of title have been issued, are
physically assembled in MasTec's office in Ft. Myers, Florida;

          (21) Other Loan Documents.  Copies of each of the other Loan
Documents, including, without being limited to, Pledge Agreements, dated the
Effective Date, duly executed by the parties thereto with evidence satisfactory
to the Administrative Agent and its counsel of the due authorization, binding
effect and enforceability of each such Loan Document on each such party and
such other documents and instruments as the Administrative Agent may reasonably
request;

          (22) Legal Opinions.  Opinions dated the Effective Date of each of
Jose Sariego, Esquire, General Counsel of MasTec, Stearns Weaver Miller
Weissler Alhadeff & Sitterson, P.A. and Powell Goldstein Frazer & Murphy, LLP
special counsel for the Borrowers, and of such other counsel, including local
counsel, as the Administrative Agent shall reasonably deem necessary or
desirable, opining as to such matters in connection with this Agreement,
including, without being limited to, its enforceability under the laws of the
State of Georgia as the Administrative Agent or its counsel may reasonably
request;

          (23) Fees.  The Administrative Agent shall have received from the
Borrowers all of the fees payable on the Effective Date referred to herein; and

          (24) Priority.  The Administrative Agent shall have received
satisfactory evidence that the Administrative Agent (for the benefit of
Lenders) has a valid and perfected first priority security interest as of such
date in all of the Collateral, subject only to Permitted Liens.

          (25) Other.  The Administrative Agent shall have received such other
certificates, instruments, agreements and other documents as the Administrative
Agent may reasonably have requested;

     (b)  Litigation.  The Administrative Agent shall have received evidence
satisfactory to it that no action, proceeding, investigation, regulation or
legislation, shall have been instituted, threatened or proposed before any
court, governmental agency or legislative body to enjoin, restrain or
prohibit, or to obtain substantial damages in respect of, or which is related
to or arises out of, this Agreement, or the consummation of the transactions
contemplated hereby, or which may otherwise have a Materially Adverse Effect.

     (c)  Capital Structure.  The Administrative Agent shall be satisfied in
its reasonable credit judgment with the capital structure of MasTec and its
Consolidated Subsidiaries as described in this Agreement and the Forecasts,
including the terms and conditions of Debt, after giving effect to the initial
Loans hereunder and the application of the proceeds thereof.

     (d)  No Material Adverse Change.  There shall not have occurred any event
or series of events or circumstances or group of circumstances which
individually or in the aggregate, in the reasonable credit judgment of the
Administrative Agent, would have a Materially Adverse Effect.

     Section 5.2  All Loans; Letters of Credit.  The obligation of the Lenders
to make (but not to continue or convert any outstanding Loan, which shall be
subject to the provisions of Section 4.12) any Loan hereunder, including any
Loans to be made on the Effective Date and all subsequent Loans, and of FCC to
cause the issuance of any Letter of Credit are further subject to the
following:

     (a)  at such time, both with and without giving effect to the Loans to be
made at such time and the application of the proceeds thereof or the Letter of
Credit Guarantee to be issued, no Default or Event of Default exist, and the
representatives and warranties of the Loan Parties set forth herein and in the
other Loan Documents are true and correct in all material respects and

     (b)  the corporate actions of the Loan Parties referred to in Section
5.1(a)(3) shall remain in full force and effect and the incumbency of officers
shall be as stated in the certificates of incumbency delivered pursuant to
Section 5.1(a)(4) or as subsequently modified and reflected in a certificate
of incumbency delivered to the Administrative Agent.

Each request or deemed request for any Borrowing or other advance or submission
of any request for any Letter of Credit hereunder shall be deemed to be a
certification by the Borrowers to the Administrative Agent and the Lenders as
to the matters set forth in Section 5.2(a) and (b) and the Administrative Agent
and the Lenders may, without waiving either condition, consider the conditions
specified in Sections 5.2(a) and (b) fulfilled and a representation by the
Borrowers to such effect made, if no written notice to the contrary is received
by the Administrative Agent prior to the making of the Loan then to be made or
the issuance of the Letter of Credit so requested.

Section 5.3	Mortgages; Title Certificates.

     (a)  On or before 60 days after the Effective Date, the applicable Loan
Parties shall deliver to the Administrative Agent Mortgages encumbering the
Real Estate described in column 2 on Annex D and unless previously sold, as
soon thereafter as practicable but in no event later than 120 days after the
Effective Date, Mortgages encumbering the Real Estate described in column 3
on Annex D, duly executed and delivered by each such Loan Party and evidencing
the recording of each such instrument in the appropriate jurisdiction for the
recording thereof on the Real Estate subject thereto or, in the Administrative
Agent's discretion, in proper form for recording in such jurisdiction.

     (b)  In respect of the Mortgages referred to in Section 5.1(a)(19), the
applicable Loan Parties shall deliver to the Administrative Agent, on or
before 60 days after the Effective Date,

         (i)  one or more fully paid mortgagee title insurance policies or, in
the Administrative Agent's discretion, unconditional commitments for the
issuance thereof with all requirements and conditions to the issuance of the
final policy deleted or marked satisfied, issued by a title insurance company
satisfactory to the Administrative Agent, each in an amount equal to not less
than the fair market value of the Real Estate subject to the Mortgage insured
thereby, insuring that such Mortgage creates a valid first lien on, or security
title to, all Real Estate described therein, with no survey exceptions and no
other exceptions which the Administrative Agent shall not have approved in
writing; and

        (ii) such materials and information concerning the Real Estate
encumbered by such Mortgages as the Administrative Agent may reasonably
require, including, without limitation, (A) current and accurate surveys,
certified to the Administrative Agent and showing the location of any "special
flood hazard areas" thereon, (B) zoning letters as to the zoning status of the
Real Estate, (C) certificates of occupancy covering the Real Estate or
evidence satisfactory to the Administrative Agent that they cannot be obtained,
and (D) owner's affidavits as to such matters relating to the Real Estate as
the Administrative Agent or the issuer of title insurance may request.

     (c)  On or before 60 days after the Effective Date, the Loan Parties shall
have obtained Title Certificates in respect of all of the Loan Parties' motor
vehicles, trailers and other property for which a certificate of title has
been issued or, at the Administrative Agent's discretion, shall have delivered
such certificates of title to the Administrative Agent together with
applications to reissue the same with the Security Interest noted thereon,
duly executed by the appropriate Loan Party and in form for submission to the
applicable Governmental Authority.

     Section 5.4  Conditions as Covenants.  In the event that the Lenders
permit this Agreement to become effective and make any Loans on the Effective
Date or permit FCC to issue a Letter of Credit Guarantee prior to the
satisfaction of all conditions precedent set forth in Section 5.1, and such
conditions are not waived in writing by the Administrative Agent, the
Borrowers shall nevertheless cause such condition or conditions to be
satisfied within 30 days after the making of such Loans or the issuance of
such Letter of Credit Guarantee.

                                    ARTICLE 6

                   REPRESENTATIONS AND WARRANTIES OF BORROWERS

     Section 6.1  Representations and Warranties.  The Borrowers represent and
warrant to the Administrative Agent and to the Lenders as follows:

     (a)  Organization; Power; Qualification.  Each Borrower and each of its
Subsidiaries is a corporation or limited liability company, duly organized,
validly existing and in good standing under the laws of its jurisdiction of
organization, having the power and authority to own its properties and to
carry on its business as now being and hereafter proposed to be conducted and
is duly qualified and authorized to do business in each jurisdiction in which
the failure to be so qualified could reasonably be expected to have a
Materially Adverse Effect.  The jurisdictions in which each of the Borrowers
and each of their respective Subsidiaries is qualified to do business as
foreign entities are listed on Schedule 6.1(a).

     (b)  Capitalization; Shareholder Agreements.  The outstanding capital
stock of the Borrowers has been duly and validly issued and is fully paid and
nonassessable, and the number and owners of such shares of capital stock of
the Borrowers, other than MasTec, are set forth on  Schedule 6.1(b).  Except
as set forth on Schedule 6.1(b), (1) no individual or "group" (within the
meaning of SS13d of the Securities Exchange Act of 1934, as amended, and SEC
regulations thereunder) owns 5% or more of MasTec's issued and outstanding
common stock, (2) the issuance and sale of the Borrowers' capital stock have
been registered or qualified under applicable federal and state securities
laws or are exempt therefrom, and (3) there are no shareholders or members
agreements, options, subscription agreements or other agreements or
understandings to which any Borrower is a party in effect with respect to the
capital stock of a Borrower, including, without limitation, agreements
providing for special voting requirements or arrangements for approval of
such Borrower's actions or other matters relating to corporate governance or
restrictions on share or member interest transfer or providing for the
issuance of any securities convertible into shares of the capital stock of or
member interests in any Borrower, any warrants or other rights to acquire any
shares or member interests or securities convertible into such shares or
member interests, or any agreement that obligates a Borrower, either by its
terms or at the election of any other Person, to repurchase such shares or
member interests under any circumstances.

     (c)  Subsidiaries.  Schedule 6.1(c) correctly sets forth the name of each
Subsidiary of any Borrower, its jurisdiction of organization, the name of its
immediate parent or parents, and the percentage of its issued and outstanding
securities owned by the Borrowers or any other Subsidiary of any Borrower.
Except as set forth on Schedule 6.1(c),

         (i)  no Subsidiary has issued any securities convertible into shares
of such Subsidiary's capital stock or member interests or any options,
warrants or other rights to acquire any shares or securities convertible into
such shares or member interests,

        (ii)  the outstanding stock and securities of or member interests in
each Subsidiary are owned by a Borrower or a Wholly Owned Subsidiary of a
Borrower, or by a Borrower and one or more of its Wholly Owned Subsidiaries,
free and clear of all Liens, warrants, options and rights of others of any
kind whatsoever, and

      (iii)  no Borrower has any Subsidiaries.

The outstanding capital stock of each Subsidiary that is a corporation has been
duly and validly issued and is fully paid and nonassessable by the issuer, and
the number and owners of the shares of such capital stock are set forth on
Schedule 6.1(c).  Each member of a Borrower that is a limited liability company
and such member's percentage interest in the equity of such Borrower are set
forth on Schedule 6.1(c).

     (d)  Authorization of Agreement, Notes, Loan Documents and Borrowing.
Each Loan Party has the right and power, and has taken all necessary action
to authorize it, to execute, deliver and perform this Agreement and each of
the Loan Documents to which it is a party in accordance with their respective
terms.  This Agreement and each of the Loan Documents have been duly executed
and delivered by the duly authorized officers of each Loan Party and each is,
or when executed and delivered in accordance with this Agreement will be, a
legal, valid and binding obligation of each such Loan Party, enforceable in
accordance with its terms.

     (e)  Compliance of Agreement, Notes, Loan Documents and Borrowing with
Laws, Etc.  Except as set forth on Schedule 6.1(e), the execution, delivery
and performance of this Agreement and each of the Loan Documents in accordance
with their respective terms and the borrowings hereunder do not and will not,
by the passage of time, the giving of notice or otherwise,

         (i)   require any Governmental Approval or violate any Applicable Law
relating to a Borrower or any of its Subsidiaries,

         (ii)  conflict with, result in a breach of or constitute a default
under the articles or certificate of incorporation, by-laws or any
shareholders' agreement of a Borrower or any of its Subsidiaries,

         (iii) conflict with, result in a breach of or constitute a default
under any material provisions of any indenture, agreement or other instrument
to which a Borrower or any of its Subsidiaries is a party or by which a
Borrower, any of its Subsidiaries or any of any Borrower's or such
Subsidiaries' property may be bound or any Governmental Approval relating to
a Borrower or any of its Subsidiaries, or

         (iv)  result in or require the creation or imposition of any Lien
upon or with respect to any property now owned or hereafter acquired by any
Loan Party other than the Security Interest.

     (f)  Business.  Each Borrower and each Subsidiary is engaged in the
business described on  Schedule 6.1(f).

     (g)  Compliance with Law; Governmental Approvals.  Except as set forth in
Schedule 6.1(g), each Borrower and each of its Subsidiaries

         (i)   has all Governmental Approvals, including permits relating to
federal, state and local Environmental Laws, ordinances and regulations,
required by any Applicable Law for it to conduct its business, each of which
is in full force and effect, is final and not subject to review on appeal and
is not the subject of any pending or, to the knowledge of any Borrower,
threatened attack by direct or collateral proceeding, and

         (ii)  is in compliance with each Governmental Approval applicable to
it and in compliance with all other Applicable Laws relating to it, including,
without being limited to, all Environmental Laws and all occupational health
and safety laws applicable to any Borrower, any of its Subsidiaries or their
respective properties, except for instances of noncompliance which would not,
singly or in the aggregate, cause a Default or Event of Default or have a
Materially Adverse Effect and in respect of which appropriate reserves have
been established.

     (h)  Title to Properties.  Except as set forth in Schedule 6.1(h), each
Borrower and each of the Subsidiaries has valid and legal title to or leasehold
interest in all personal property, Real Estate and other assets used in its
business, including, but not limited to, those reflected on the most recent
balance sheet of the Borrowers delivered pursuant to Section 6.1(n).

     (i)  Liens.  Except as set forth in Schedule 6.1(i), none of the
properties and assets of any Borrower or any Subsidiary is subject to any
Lien, except Permitted Liens.  Other than the Financing Statements, no
financing statement under the UCC of any State or other instrument evidencing
a Lien which names a Borrower or any Subsidiary as debtor has been filed (and
has not been terminated) in any State or other jurisdiction, and neither any
Borrower nor any Subsidiary has signed any such financing statement or other
instrument (which financing statement or other instrument has not been
terminated) or any security agreement (which security agreement has not been
terminated) authorizing any secured party thereunder to file any such financing
statement or instrument, except to perfect those Liens listed on
Schedule 6.1(i).

     (j)  Indebtedness and Guarantees.  Schedule 6.1(j) is a complete and
correct listing of all (i) Debt and (ii) Guarantees of each Borrower and each
of its Subsidiaries.  Each Borrower and each of its Subsidiaries has performed
and is in compliance in all material respects with all of the terms of such
Debt and Guarantees and all instruments and agreements relating thereto, and
no default or event of default, or event or condition which with notice or
lapse of time, or both, would constitute such a default or event of default,
exists with respect to any such Debt or Guaranty.

     (k)  Litigation.  Except as set forth on Schedule 6.1(k), as of the
Effective Date there are no actions, suits or proceedings pending (nor, to the
knowledge of any Borrower, are there any actions, suits or proceedings
threatened, or any reasonable basis therefor) against or in any other way
relating to or affecting a Borrower or its Subsidiaries or any of their
respective properties in any court or before any arbitrator of any kind or
before or by any governmental body, except actions, suits or proceedings of
the character normally incident to the kind of business conducted by the
Borrowers and their Subsidiaries which, if adversely determined, would not
singly or in the aggregate have a Materially Adverse Effect, and there are no
strikes or walkouts in progress, pending or contemplated relating to any labor
contracts to which a Borrower or any of its Subsidiaries is a party, relating
to any labor contracts being negotiated, or otherwise.

     (l)  Tax Returns and Payments.  Except as set forth on Schedule 6.1(l),
all United States federal, state and local as well as foreign national,
provincial and local and other tax returns of each Borrower and each of its
Subsidiaries required by Applicable Law to be filed have been duly filed, and
all United States federal, state and local and foreign national, provincial
and local and other taxes, assessments and other governmental charges or
levies upon a Borrower or any of its Subsidiaries or their respective property,
income, profits and assets which are due and payable have been paid, except
any such nonpayment which is at the time permitted under Section 9.6.  The
charges, accruals and reserves on the books of the Borrowers and each
Subsidiary as of the Effective Date in respect of United States federal,
state and local and foreign national, provincial and local taxes for all
fiscal years and portions thereof since January 1, 1994 are in the judgment
of the Borrowers adequate, and the Borrowers know of no reason to anticipate
any additional assessments for any of such years which, singly or in the
aggregate, might have a Materially Adverse Effect.

     (m)  Burdensome Provisions.  Except as set forth on Schedule 6.1(m),
neither Borrower nor any Subsidiary is a party to any indenture, agreement,
lease or other instrument, or subject to any charter or corporate restriction,
Governmental Approval or Applicable Law compliance with the terms of which is
reasonably likely to have a Materially Adverse Effect.

     (n)  Financial Statements.

          (i)   The Borrowers have furnished to the Administrative Agent and
the Lenders copies of MasTec's (A) audited consolidated balance sheet as at
December 31, 2000 and the related audited consolidated statements of income,
cash flow and shareholders equity for the Fiscal Year then ended and (B)
unaudited consolidated balance sheets as at November 30, 2001 and the related
consolidated statements of income and cash flows for the one-month and
eleven-month periods then ended and the unaudited consolidating balance sheets
and related unaudited consolidating statements of income and cash flows
for MasTec's NAOperations (in the aggregate) and for MasTec Brazil and all
other Subsidiaries taken together for the same periods, which financial
statements present fairly and in all material respects in accordance with
GAAP the financial positions of MasTec and its Consolidated Subsidiaries and
MasTec's NAOperations as at their respective dates, and the results of
operations of MasTec and its Consolidated Subsidiaries and MasTec's
NAOperations for the periods then ended (except, in the case of the interim
statements, for the omission of notes and subject to normal year-end audit
adjustments).

         (ii)   Except as set forth on Schedule 6.1(n) or as disclosed or
reflected in the financial statements described in clause (i) above, MasTec
and its Subsidiaries, taken as a whole, have no material liabilities,
contingent or otherwise.

         (iii)	The Borrowers have furnished to the Administrative Agent and
the Lenders copies of MasTec's forecasts for 2001-2006, prepared on a
quarterly basis for the last Fiscal Quarter of 2001 and for Fiscal Year
2002 and on an annual basis thereafter (the "Forecasts"), together with a
statement of the assumptions on which such forecasts are based.  The Forecasts
reflect MasTec's good faith estimate of the consolidated financial position
and results of North American operations of MasTec and its Consolidated
Subsidiaries over the forecast periods and were prepared on a reasonable basis
provided that the Forecasts are subject to the assumptions on which they are
based, as well as to a number of risks and uncertainties, including that the
Borrowers' revenue may differ from that projected, that the Borrowers may be
adversely affected by slowdowns in the Borrowers' clients' businesses or
deterioration in the Borrowers' clients' financial condition, that the
Borrowers' reserves may be inadequate or the Borrowers' equity investments
may be impaired, that the Borrowers may experience increased costs associated
with realigning the Borrowers' business or may be unsuccessful in those
efforts.  Should one or more of these risks or uncertainties materialize, or
should the underlying assumptions prove incorrect, actual results may
differ significantly from results expressed or implied in the Forecasts.

     (o)  Adverse Change.  Since the date of the latest financial statements
referred to in Section 6.1(n)(i),

         (i)  no material adverse change has occurred in the business, assets,
liabilities, financial condition, results of operations or business prospects
of MasTec, the other Borrowers and their respective Subsidiaries taken as a
whole, and

        (ii)  no event has occurred or failed to occur which has had, or may
have, singly or in the aggregate, a Materially Adverse Effect.

     (p)  ERISA.  Neither any Borrower nor any Related Company maintains or
contributes to any Benefit Plan other than those listed on Schedule 6.1(p).
Except as set forth on Schedule 6.1(p), and subject to correction of possible
Remediable Defects, each Benefit Plan is in substantial compliance with ERISA
and the Code, including but not limited to those provisions thereof relating
to reporting and disclosure, and neither any Borrower nor any Related Company
has received any notice asserting that a Benefit Plan is not in compliance with
ERISA.  No material liability to the PBGC or to a Multiemployer Plan has been,
or is expected to be, incurred by any Borrower or any Related Company.  Except
as set forth on Schedule 6.1(p), and subject to correction of possible
Remediable Defects,  each Benefit Plan intended to qualify under Section 401(a)
of the Code so qualifies and any related trust is exempt from federal income
tax under Section 501(a) of the Code.  A favorable determination letter from
the IRS (if required) has been issued or applied for with respect to each such
plan and trust and nothing that is not a Remediable Defect has occurred since
the date of such determination letter that would adversely affect such
qualification or tax-exempt status.  No Benefit Plan subject to the minimum
funding standards of the Code has failed to meet such standards.  Neither the
Borrower or any Related Company has transferred any pension plan liability in
a transaction that could be subject to Sections 4069 or 4212(c) of ERISA.
Except as set forth on Schedule 6.1(p), neither any Borrower nor any Related
Company has any liability, actual or contingent, with respect to any Benefit
Plan other than to make payments to the Benefit Plan in accordance with its
terms, and there are no pending or threatened claims against a Benefit Plan.
No non-exempt prohibited transaction with the meaning of Section 4975 of the
Code or Section 406 of ERISA has occurred with respect to a Benefit Plan.
Except under plans listed on Schedule 6.1(p), no employee or former employee
of any Borrower or any Related Company is or may become entitled to any
benefit under a Benefit Plan that is a "welfare plan" within the meaning of
Section 3(1) of ERISA following such employee's termination of employment.
Except as set forth on Schedule 6.1(p), each such welfare plan that is a group
health plan has been operated in compliance in all material respects with
the provision of Section 4980B of the Code and Sections 601-609 of ERISA
and any applicable provisions of state law that are similar.

     (q)  Absence of Defaults.  No Borrower nor any Subsidiary is in default
under its articles or certificate of incorporation or by-laws and no event has
occurred, which has not been remedied, cured or waived,

         (i)  which constitutes a Default or an Event of Default, or

         (ii) which constitutes, or which with the passage of time or giving
of notice, or both, would constitute, a default or event of default by a
Borrower or any of its Subsidiaries under any material agreement (other than
this Agreement) or judgment, decree or order to which such Borrower or any of
its Subsidiaries is a party or by which such Borrower, any of its Subsidiaries
or any of such Borrower's or any of its Subsidiaries' properties may be bound
or which would require a Borrower or any Subsidiary to make any payment under
any thereof prior to the scheduled maturity date therefor, except, in the case
only of any such agreement, for alleged defaults which are being contested in
good faith by appropriate proceedings and with respect to which reserves in
respect of a Borrower's or such Subsidiary's reasonably anticipated liability
have been established on the appropriate books or which could not reasonably
be expected to have a Materially Adverse Effect.

     (r)  Accuracy and Completeness of Information.

         (i)  As of the Effective Date, no fact is known to the Borrowers
(other than as reflected in EBITDA Adjustment Amounts) which has had, or is
reasonably likely in the future to have (so far as the Borrowers can
reasonably foresee), a Materially Adverse Effect which has not been set forth
in the financial statements or disclosure delivered to the Administrative
Agent and the Lenders prior to the Effective Date.  No document furnished or
written statement made to the Administrative Agent or any Lender by the
Borrowers (or any of them) prior to the Agreement Date, in connection with
the negotiation, preparation or execution of this Agreement or any of the
Loan Documents contained, except to the extent corrected or superseded prior
to the Agreement Date, any untrue statement of a fact material to the
creditworthiness of a Borrower or omitted to state a material fact necessary
in order to make the statements contained therein not misleading.

         (ii) The Borrowers have no reason to believe that any document
furnished or written statement made to the Administrative Agent or any Lender
prior to the Agreement Date by any Person other than the Borrowers in
connection with the negotiation, preparation or execution of this Agreement
or any of the Loan Documents contained any incorrect statement of a material
fact or omitted to state a material fact necessary in order to make the
statements made, in light of the circumstances under which they were made,
not misleading, that has not been corrected or superseded prior to the
Effective Date.

     (s)  Solvency.  In each case after giving effect to the Debt represented
by the Loans to be incurred and the transactions contemplated by this
Agreement, each Borrower and each of its Subsidiaries is solvent, having
assets of a fair salable value which exceeds the amount required to pay
its debts as they become absolute and matured (including contingent,
subordinated, unmatured and unliquidated liabilities), and each Borrower
and each of its Subsidiaries is able to and anticipates that it will be able
to meet its debts as they mature and has adequate capital to conduct the
business in which it is or proposes to be engaged.

     (t)  Accounts.

         (i)  Status.

             (1)  Each Account reflected in the computations included in any
Borrowing Base Certificate meets the criteria enumerated in clauses (a)
through (p) of the definition "Eligible Accounts," except as disclosed in
such Borrowing Base Certificate or as disclosed in a timely manner in a
subsequent Borrowing Base Certificate or otherwise in writing to the
Administrative Agent.

             (2)  No Borrower has any knowledge of any fact or circumstance
not disclosed to the Administrative Agent in a Borrowing Base Certificate or
otherwise in writing which would impair the validity or collectibility of any
Account of $500,000 or more or of Accounts which (regardless of the individual
amount thereof) aggregate $1,000,000 or more.

         (ii)  Chief Executive Office.  The chief executive office of each
Borrower and the books and records relating to the Accounts are located on the
Effective Date at the address or addresses set forth on Schedule 6.1(t).

     (u)  Inventory and Equipment.

         (i)   Condition of Inventory.  All Inventory: (i) is owned by a Loan
Party, is subject to the Security Interest which is perfected as to such
Inventory, and is not subject to any other Lien whatsoever other than a
Permitted Lien; (ii) is in good condition and meets in all material respects
the standards applicable to such goods, their use or sale imposed by any
governmental agency, or department or division thereof, having regulatory
authority over such matters; and (iii) is currently either usable or saleable,
at prices approximating at least the cost thereof, in the normal course of
the applicable Loan Party's business except to the extent reserved against
in the financial statements referred to in Section 6.1(n).

         (ii)  Condition of Equipment.  All Equipment is in good condition,
ordinary wear and tear excepted, other than obsolete equipment no longer
used or useful in the business of the Borrowers or MasTec's NA Operations.

         (iii) Location.  All Inventory and Equipment, other than Inventory
and Equipment having a value not greater than $500,000 in total, is in the
possession and control of a Loan Party within the continental United States
at an address listed on Schedule 6.1(u).

     (v)  Corporate and Fictitious Names.  Except as otherwise disclosed
on Schedule 6.1(v), during the five-year period preceding the Agreement
Date, neither any Borrower nor any predecessor thereof has been known as or
used any corporate or fictitious name other than the registered name of
such Borrower on the Effective Date.

     (w)  Federal Reserve Regulations.  Neither any Borrower nor 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" any "Margin Stock" (as each of the quoted terms is defined or
used in Regulation U of the Board of Governors of the Federal Reserve System).

     (x)  Investment Company Act.  No Borrower is an "investment company" or a
company "controlled" by an "investment company" (as each of the quoted terms
is defined or used in the Investment Company Act of 1940, as amended).

     (y)  Employee Relations.  None of the Borrowers or their Subsidiaries is,
except as set forth on Schedule 6.1(y), party to any collective bargaining
agreement nor has any labor union been recognized as the representative of a
Borrower's or any of its Subsidiaries' employees, and the Borrowers know of
no pending, threatened or contemplated strikes, or of any work stoppage or
other labor dispute involving a Borrower's or any Subsidiary's employees that
could reasonably be expected to have a Materially Adverse Effect.

     (z)  Proprietary Rights.  Each Borrower owns or has the right to use all
Proprietary Rights necessary or desirable in the conduct of its business as
conducted on the Agreement Date and as expected on the Agreement Date to be
conducted in the future.  All federally registered Trademarks, Patents and
Copyrights of any Loan Party are listed on Schedule 6.1(z).  To the best of
the Borrowers' knowledge, none of such Proprietary Rights infringes on or
conflicts with any other Person's property, and no other Person's property
infringes on or conflicts with the Proprietary Rights.

     (aa)  Trade Names.  All trade names or styles under which any Loan Party
sells Inventory or creates Accounts, or to which instruments in payment of
Accounts are made payable, all as of the Effective Date, are listed on Schedule
6.1(aa).

     (bb)  Bank Accounts.  Attached hereto as Schedule 6.1(bb) is a complete
and correct list of all checking accounts, depository accounts, special
deposit accounts and other accounts maintained by any Borrower or Subsidiary
with any commercial bank or savings bank as of the Effective Date and each
such account (except any account indicated by an asterisk (*))
is subject to a Control Agreement.

     (cc)  Real Property.  No Borrower nor any Subsidiary owns any Real Estate
nor leases any Real Estate other than that described on Schedule 6.1(dd).

     Section 6.2  Survival of Representations and Warranties, Etc.  All
representations and warranties set forth in this Article 6 and all statements
contained in any certificate, financial statement, or other instrument,
delivered by or on behalf of the Borrowers pursuant to or in connection with
this Agreement or any of the Loan Documents (including, but not limited to,
any such representation, warranty or statement made in or in connection with
any amendment thereto) shall constitute representations and warranties made
under this Agreement.  All representations and warranties made under this
Agreement shall be made or deemed to be made at and as of the Agreement Date
at and as of the Effective Date, and as provided in Section 5.2, except that
representations and warranties which, by their terms are applicable only to
one such date shall be deemed to be made only at and as of such date.  All
representations and warranties made or deemed to be made under this Agreement
shall survive and not be waived by the execution and delivery of this
Agreement, any investigation made by or on behalf of the Administrative Agent
or any Lender or any borrowing hereunder.

                                ARTICLE 7

                            SECURITY INTEREST

     Section 7.1  Security Interest.

     (a)  Each Borrower hereby mortgages, pledges and assigns all of the
Collateral to the Administrative Agent, for the benefit of itself as
Administrative Agent, the Lenders and Affiliates of the Lenders, and grants
to the Administrative Agent, for the benefit of itself as Administrative Agent,
the Lenders and Affiliates of the Lenders, a continuing security interest in,
and a continuing Lien upon, all of the Collateral as security for the payment,
observance and performance of the Secured Obligations.

     (b)  As additional security for all of the Secured Obligations, the
Borrowers grant to the Administrative Agent, for the benefit of itself as
Administrative Agent, the Lenders and Affiliates of the Lenders, a security
interest in, and assigns to the Administrative Agent, for the benefit of
itself as Administrative Agent and the Lenders and Affiliates of the Lenders,
all of the Borrowers' right, title and interest in and to, any deposits or
other sums at any time credited by or due from each Lender and each Affiliate
of a Lender to a Borrower, or credited by or due from any participant of any
Lender to a Borrower, with the same rights therein as if the deposits or
other sums were credited by or due from such Lender.  Each Borrower hereby
authorizes each Lender and each Affiliate of such Lender and each participant
to pay or deliver to the Administrative Agent, for the account of the Lenders,
without any necessity on the Administrative Agent's or any Lender's part to
resort to other security or sources of reimbursement for the Secured
Obligations, at any time during the continuation of any Event of Default or
in the event that the Administrative Agent, on behalf of the Lenders, should
make demand for payment hereunder in accordance with the terms hereof, then
and without further notice to any Borrower (such notice being expressly
waived), any of the aforesaid deposits (general or special, time or demand,
provisional or final) or other sums for application to any Secured Obligation,
irrespective of whether any demand has been made or whether such Secured
Obligation is mature, and the rights given the Administrative Agent, the
Lenders, their Affiliates and participants hereunder are cumulative with such
Person's other rights and remedies, including other rights of set-off.  The
Administrative Agent will promptly notify the Borrowers of its receipt of
any such funds for application to the Secured Obligations, but failure to do
so will not affect the validity or enforceability thereof.  The Administrative
Agent may give notice of the above grant of a security interest in and
assignment of the aforesaid deposits and other sums, and authorization, to,
and make any suitable arrangements with, any Lender, any such Affiliate of
any Lender or participant for effectuation thereof, and each Borrower hereby
irrevocably appoints the Administrative Agent as its attorney to collect any
and all such deposits or other sums to the extent any such payment is not
made to the Administrative Agent or any Lender by such Lender, Affiliate
or participant.

     Section 7.2  Continued Priority of Security Interest.

     (a)  The Security Interest granted by the Borrowers shall at all times
be valid, perfected and enforceable against each Borrower and all third
parties in accordance with the terms of this Agreement, as security for the
Secured Obligations, and the Collateral shall not at any time be subject to
any Liens that are prior to, on a parity with or junior to the Security
Interest, other than Permitted Liens.

     (b)  The Borrowers shall, at their sole cost and expense, take all action
that may be necessary or desirable, or that the Administrative Agent may
reasonably request, so as at all times to maintain the validity, perfection,
enforceability and rank of the Security Interest in the Collateral in
conformity with the requirements of Section 7.2(a), or to enable the
Administrative Agent and the Lenders to exercise or enforce their rights
hereunder, including, but not limited to:

          (i)   paying all taxes, assessments and other claims lawfully levied
or assessed on any of the Collateral, except to the extent that such taxes,
assessments and other claims constitute Permitted Liens,

          (ii)  using all reasonable efforts to obtain, after the Agreement
Date, landlords', mortgagees', bailees', warehousemen's or processors'
releases, subordinations or waivers and mechanics' releases, subordinations
or waivers,

         (iii)  delivering to the Administrative Agent, for the benefit of
the Lenders, endorsed or accompanied by such instruments of assignment as
the Administrative Agent may specify, and stamping or marking, in such
manner as the Administrative Agent may specify, any and all chattel paper,
instruments, letters and advices of guaranty and documents evidencing or
forming a part of the Collateral, and

          (iv)  executing and delivering financing statements, pledges,
designations, hypothecations, notices and assignments in each case in form
and substance satisfactory to the Administrative Agent relating to the
creation, validity, perfection, maintenance or continuation of the Security
Interest under the UCC or other Applicable Law.

     (c)  The Administrative Agent is hereby authorized to file one or more
financing or continuation statements or amendments thereto for any purpose
described in Section 7.2(b), including, without being limited to, any
financing statement describing the collateral as "all assets."

     (d)  Each Borrower shall mark its books and records as directed by the
Administrative Agent and as may be necessary or appropriate to evidence,
protect and perfect the Security Interest and shall cause its financial
statements to reflect the Security Interest.

                                ARTICLE 8

                           COLLATERAL COVENANTS

     Each Borrower covenants and agrees that until the Commitments have been
terminated and all the Secured Obligations have been paid in full, unless
the Lenders shall otherwise consent in the manner provided in Section 15.9:

     Section 8.1  Collection of Accounts.

     (a)  The Borrowers will and will cause each other Loan Party to cause
all monies, checks, notes, drafts and other payments relating to or
constituting proceeds of trade accounts receivable, other Accounts and
other Collateral to be deposited in a Controlled Account in accordance
with the procedures set out in the corresponding Control Agreement.
In particular, each Borrower will and will cause each other Loan Party to
advise each Account Debtor that makes payment to such Borrower or other
Loan Party by wire transfer, ACH Transfer or similar means to make payment
directly to a Controlled Account.

     (b)  Without limiting the ability of the Administrative Agent and the
Lenders to exercise other rights and remedies hereunder, all of the Loan
Parties shall have established with a Clearing Bank, Lockboxes to which
monies, checks, notes, drafts and other payments relating to or constituting
proceeds of Collateral shall be sent and each Borrower will and will cause
each other Loan Party to:

         (i)   advise each Account Debtor on trade accounts receivable that
does not make payments directly to a Controlled Account to address all
remittances with respect to amounts payable on account thereof to a
specified Lockbox, and

         (ii)  stamp all invoices relating to trade accounts receivable
with a legend satisfactory to the Administrative Agent indicating that
payment is to be made to such Borrower or other Loan Party via a specified
Lockbox.

     (c)  The Borrowers and the Administrative Agent shall cause all
collected balances in each Controlled Account to be transmitted daily
by wire transfer, ACH Transfer, depository transfer check or other means
in accordance with the procedures set forth in the corresponding Control
Agreement or such instructions, to the Administrative Agent in accordance
with the instructions set forth in Annex E:

          (i)   for application, on account of the Secured Obligations, as
provided in Sections 2.3(c), 4.16, 12.2, and 12.3, such credits to be
entered as of the Business Day they are received if they are received
prior to 2:00 p.m. and to be conditioned upon final payment in cash or
solvent credits of the items giving rise to them (provided that a
collection fee shall be payable by the Borrowers with respect to any such
credit received in other than immediately available funds, equal to one
day's interest, at the rate applicable to Base Rate Loans, on such
amount), and

         (ii)  with respect to the balance, so long as no Default or Event
of Default has occurred and is continuing, for transfer by wire transfer,
ACH Transfer or depository transfer check to a Disbursement Account or
other account as agreed between the Administrative Agent and the Borrowers.
(d)	Any monies, checks, notes, drafts or other payments referred to in
subsection (a) or (b) of this Section 8.1 which, notwithstanding the terms
of such subsection, are received by or on behalf of the applicable Borrower
will be held in trust for the Administrative Agent and will be delivered
to the Administrative Agent or a Clearing Bank as promptly as possible,
in the exact form received, together with any necessary endorsements for
application by the Administrative Agent directly to the Secured Obligations
or, as applicable, for deposit in the Controlled Account maintained with
such Clearing Bank and processing in accordance with the terms of the
corresponding Control Agreement.

     Section 8.   Verification and Notification.  The Administrative
Agent shall have the right at any time and from time to time,

     (a)  in the name of the Administrative Agent, the Lenders or in the
name of a Borrower, to verify the validity, amount or any other matter
relating to any Accounts by mail, telephone, telegraph or otherwise,

     (b)  to review, audit and make extracts from all records and files
related to any of the Accounts, and

     (c)  if a Default or Event of Default has occurred and is continuing,
to notify the Account Debtors or obligors under any Accounts of the
assignment of such Accounts to the Administrative Agent, for the benefit
of the Lenders, and to direct such Account Debtor or obligors to make
payment of all amounts due or to become due thereunder directly to the
Administrative Agent, for the account of the Lenders, and, upon such
notification and at the expense of the Borrowers, to enforce collection
of any such Accounts and to adjust, settle or compromise the amount or
payment thereof, in the same manner and to the same extent as the
applicable Borrower might have done.

     Section 8.3   Disputes, Returns and Adjustments.

     (a)  In the event any amounts due and owing under any Account for an
amount in excess of $1,000,000 are in dispute between the Account Debtor
and the applicable Borrower, the Borrowers shall provide the Administrative
Agent with prompt written notice thereof.

     (b)  The Borrowers shall notify the Administrative Agent promptly of all
returns and credits in excess of $1,000,000 in respect of any Account, which
notice shall specify the Account affected.

     (c)  The Borrowers may, in the ordinary course of business unless a
Default or an Event of Default has occurred and is continuing, grant any
extension of time for payment of any Account or compromise, compound or
settle the same for less than the full amount thereof, or release wholly or
partly any Person liable for the payment thereof, or allow any credit or
discount whatsoever therein; provided that (i) no such action results in
the reduction of more than $1,000,000 in the amount payable with respect to
any Account or of more than $5,000,000 with respect to all Accounts in any
Fiscal Year (in each case, excluding the allowance of credits or discounts
generally available to Account Debtors in the ordinary course of the
applicable Borrower's business), and (ii) the Administrative Agent is
promptly notified of the amount of such adjustments and the Account(s)
affected thereby (including by reflecting such reduction in an appropriate
Borrowing Base Certificate or Schedule of Accounts).

     Section 8.4   Invoices.

     (a)  No Borrower will issue invoices other than in its own name or in
a trade name of which the Administrative Agent has received prior written
notice, accompanied by such evidence as the Administrative Agent may
reasonably require that all actions required pursuant to Article 7 with
respect to Accounts or other Collateral created or held in such name have
been taken.

     (b)  No Borrower will use any invoices other than invoices in its
correct legal name or the name "MasTec" and including remittance
instructions to a Lockbox.

     (c)  Upon the request of the Administrative Agent, the Borrowers shall
deliver to the Administrative Agent, at the Borrowers' expense, copies of
customers' invoices or the equivalent, original shipping and delivery
receipts or other proof of delivery, customers' statements, customer address
lists, and if an Event of Default has occurred and is continuing, the
original copy of all documents, including, without limitation, repayment
histories and present status reports, relating to Accounts and such other
documents and information relating to the Accounts as the Administrative
Agent shall specify.

     Section 8.5   Delivery of Instruments.  In the event any Account is
at any time evidenced by a promissory note, trade acceptance or any other
instrument for the payment of money, the Borrowers will, promptly upon
request by the Administrative Agent, deliver such instrument to the
Administrative Agent for the benefit of the Lenders, appropriately
endorsed to the Administrative Agent.

     Section 8.6   Sales of Inventory.  All sales of Inventory will be made
and all services will be rendered in compliance in all material respects
with all requirements of Applicable Law.

     Section 8.7   Ownership and Defense of Title.

     (a)  Except for Permitted Liens, the Borrowers shall be or shall cause
another Loan Party to be at all times the sole owners or lessees of each and
every item of Collateral and shall not create nor permit any other Loan
Party to create any lien on, or sell, lease, exchange, assign, transfer,
pledge, hypothecate, grant a security interest or security title in or
otherwise dispose of, any of the Collateral or any interest therein, except
for (i) sales of Inventory in the ordinary course of business, for cash or
on open account or on terms of payment ordinarily extended to its customers,
(ii) sales of the Real Estate described in column 3 on Annex D, (iii)  sales
of Inventory other than in the ordinary course of business and of Equipment
and other capital assets (other than the Real Estate described in clause
(ii) above) in an aggregate amount not to exceed $5,000,000 (or 100% of the
capital stock of a Subsidiary, the value of all assets of which does not
exceed $5,000,000) in any Fiscal Year and (iv) dispositions that are
otherwise expressly permitted under this Agreement, any Security Document,
or any Subsidiary Security Agreement.

     (b)  Each Borrower shall defend and cause each other Loan Party to
defend its title or leasehold interest in and to, and the Security Interest
in, the Collateral against the claims and demands of all Persons.

     Section 8.8   Insurance.

     (a)	The Borrowers shall at all times maintain and cause the
other Loan Parties to maintain insurance on the Collateral and their other
property against loss or damage by fire, theft (excluding theft by
employees), burglary, pilferage, loss in transit and such other hazards as
the Administrative Agent shall reasonably specify, in amounts not to exceed
those obtainable at commercially reasonable rates and under policies issued
by insurers acceptable to the Administrative Agent in the exercise of its
reasonable judgment.  The Administrative Agent hereby acknowledges and
confirms that the coverages reflected on the certificates delivered pursuant
to Section 5.1(a)(9) are acceptable as of the Effective Date.  All premiums
on such insurance shall be paid by the Borrowers and copies of the policies
delivered to the Administrative Agent at its request.  The Borrowers will
not use or permit the Inventory or its other property to be used in
violation in any material respect of Applicable Law or in any manner
which might render inapplicable any insurance coverage.

     (b)  All insurance policies required under Section 8.8(a) relating
to Collateral shall name the Administrative Agent as an additional insured
and shall contain loss payable clauses in the form submitted to the
Borrowers by the Administrative Agent, or otherwise in form and substance
satisfactory to the Required Lenders, naming the Administrative Agent, as
loss payee, as its interests may appear, and providing that

         (i)   all proceeds thereunder shall be payable to the
Administrative Agent,

         (ii)  no such insurance shall be affected by any act or neglect
of the insurer or owner of the property described in such policy, and

         (iii) such policy and loss payable clauses may be canceled,
amended or terminated only upon at least 10 days' prior written notice
given to the Administrative Agent.

     (c)  Any proceeds of insurance referred to in this Section 8.8 which
are paid to the Administrative Agent shall be applied to the payment or
prepayment of the Secured Obligations, provided that in the event that
the proceeds from any single casualty do not exceed $1,000,000, then, upon
the Borrowers' written request to the Administrative Agent, provided that
no Default or Event of Default shall have occurred and be continuing, such
proceeds shall be disbursed by the Administrative Agent to the Borrowers
pursuant to such procedures as the Administrative Agent shall reasonably
establish for application to the replacement of the damaged or destroyed
property or other uses permitted by the Loan Documents.

     Section 8.9   Location of Offices and Collateral.

     (a)  No Borrower will change the location of its chief executive
office or the place where it keeps its books and records relating to the
Collateral from the address set forth for it on Schedule 6.1(t) or
change its name, its identity or corporate structure from that in effect
on the Effective Date, complete any transaction that results in a change
of such Borrower's jurisdiction of organization or use any trade name not
listed on Schedule 6.1(aa), without giving the Administrative Agent 30
days' prior written notice thereof accompanied by such evidence as the
Administrative Agent may reasonably require that all actions required to
be taken pursuant to Article 7 have been taken.

     (b)  If any Inventory is in the possession or control of any of a
Borrower's agents or processors, the Borrowers shall notify such agents or
processors of the Security Interest (and shall promptly provide copies of
any such notice to the Administrative Agent and the Lenders) and, upon the
occurrence of an Event of Default, shall instruct them (and cause them to
acknowledge such instruction) to hold all such Inventory for the account
of the Lenders, subject to the instructions of the Administrative Agent.

     (c)  All Equipment is and will be in a Borrower's possession and
control, is and will be maintained in good working order and condition,
ordinary wear and tear excepted, and is mobile goods or is located at a
location for such Borrower listed on Schedule 6.1(u).

     Section 8.10  Records Relating to Collateral.  The Borrowers will and
will cause their Subsidiaries to at all times

     (a)  keep complete and accurate records of Inventory and Equipment
on a basis consistent with past practices of MasTec in accordance with
GAAP, and

     (b)  keep complete and accurate records of all other Collateral.

     Section 8.11  Inspection.  The Administrative Agent and each Lender
(by any of their officers, employees or agents) shall have the right, to
the extent that the exercise of such right shall be within the control of
a Borrower, at any time or times during customary business hours and, if
no Event of Default has occurred and is continuing, upon prior notice to
MasTec to:

     (a)  visit the properties of the Borrowers and the Subsidiaries,
inspect the Collateral and the other assets of the Borrowers and the
Subsidiaries and inspect and make extracts from the books and records of
the Borrowers and the Subsidiaries, including but not limited to
management letters prepared by independent accountants, all during
customary business hours at such premises;

     (b)  discuss the Borrowers' and the Subsidiaries' business, assets,
liabilities, financial condition, results of operations and business
prospects, insofar as the same are reasonably related to the rights of
the Administrative Agent or the Lenders hereunder or under any of the
Loan Documents, with the Borrowers' and the Subsidiaries' (i) principal
officers, (ii) independent accountants, and (iii) any other Person; and

     (c)  verify the amount, quantity, value and condition of, or any
other matter relating to, any of the Collateral and in this connection
to review, audit and make extracts from all records and files related to
any of the Collateral; provided, that the Administrative Agent and the
Lenders will maintain all "Confidential Information" (as defined in
Section 15.10) obtained under this Section 8 in accordance with the
provisions of Section 15.10.  The Borrowers will deliver to the
Administrative Agent, upon the Administrative Agent's request, any
instrument necessary for it to obtain records from any service bureau
maintaining records on behalf of the Borrowers or any Subsidiary.

     Section 8.12  Information and Reports.

     (a)  Schedule of Accounts.  The Borrowers shall deliver to the
Administrative Agent on or before the Effective Date and not later than
the 25th day of each calendar month thereafter a Schedule of Accounts
which

         (i)   shall be as of the last day of the immediately preceding
month,

         (ii)  shall be reconciled to the Borrowing Base Certificate as
of such last day, and

        (iii)  shall set forth a summary aging of the Borrowers' then
existing Accounts, specifying, if requested to do so by the
Administrative Agent, the names, addresses and balance due for each
Account Debtor obligated on an Account so listed.

     (b)  Schedule of Inventory.  The Borrowers shall deliver to the
Administrative Agent as reasonably requested by the Administrative Agent,
a Schedule of Inventory describing the kind, type and quantity of
Inventory, the applicable Borrower's cost thereof and the location
thereof in summary form reasonably acceptable to the Administrative Agent.

     (c)  Monthly Collections Reports.  The Borrowers shall deliver to
the Administrative Agent monthly on the 25th day of each calendar month,
as of the last day of the preceding month, a report of collections for
the period since the date of the next preceding report and on a
cumulative basis for previous 60 days.

     (d)  Borrowing Base Certificate.  The Borrowers shall deliver to the
Administrative Agent on the 25th day of each calendar month, a Borrowing
Base Certificate prepared as of the last day of the preceding month,
accompanied by a calculation of the percentage of Eligible Accounts
represented as of such last day by the Accounts of the Borrowers' 10
largest clients and a list of Approved Account Debtors as of such last day.

     (e)  Notice of Diminution of Value.  The Borrowers shall give prompt
notice to the Administrative Agent of any matter or event which has
resulted in, or is reasonably likely to result in, the diminution in
excess of $5,000,000 in any Fiscal Year in the value of any of its
Collateral, except for any such diminution in value in the ordinary course
of business which has been appropriately reserved against, as reflected in
financial statements previously delivered to the Administrative Agent and
the Lenders pursuant to Article 10.

     (f)  Motor Vehicles.  Quarterly within 60 days after the end of each
Fiscal Quarter, a certificate of Ellen Odom or her/his successor as agent
of the Administrative Agent, in such form as the Administrative Agent and
the Borrowers may agree, listing all title certificates for vehicles owned
by the Loan Parties as of the last day of such Fiscal Quarter, indicating
vehicles sold or transferred and vehicles purchased since the date of the
last such certificate and confirming that all title certificates for such
purchased vehicles with a purchase price in excess of $2,500 reflect the
Administrative Agent as the first lienor thereof (or that applications
for a new title certificate reflecting such Lien has been properly made).

     (g)  Additional Information.  The Administrative Agent may in its
reasonable discretion from time to time request that the Borrowers deliver
the schedules and certificates described in Sections 8.12(a), (b), (c),
(d) and (f) more or less often and on different schedules and in greater
or less detail than specified in such Sections and the Borrowers will
comply with such requests.  The Borrowers will also furnish to the
Administrative Agent and each Lender such other information with respect
to the Collateral as the Administrative Agent or any Lender may from time
to time reasonably request.

     Section 8.13  Power of Attorney.  Each Borrower hereby appoints the
Administrative Agent as its attorney, with power

     (a)  to endorse the name of such Borrower on any checks, notes,
acceptances, money orders, drafts or other forms of payment or security
that may come into the Administrative Agent's or any Lender's possession
and apply the same in accordance with the provisions of this Agreement, and

     (b)  if an Event of Default exists, to sign the name of such Borrower
on any invoice or bill of lading relating to any Accounts, Inventory or
other Collateral, on any drafts against customers related to letters of
credit, on schedules and assignments of Accounts furnished to the
Administrative Agent or any Lender by such Borrower, on notices of
assignment, financing statements and other public records relating to the
perfection or priority of the Security Interest, verifications of account
and notices to or from customers.

     Section 8.14  Assignment of Claims Act.  Upon the request of the
Administrative Agent, the Borrowers shall execute any documents or
instruments and shall take such steps or actions reasonably required by
the Administrative Agent so that all monies due or to become due under
any contract with the United States of America, the District of Columbia
or any state, county, municipality or other domestic or foreign
governmental entity, or any department, agency or instrumentality thereof,
will be assigned to the Administrative Agent, for the benefit of itself
and the Lenders, and notice given thereof in accordance with the
requirements of the Assignment of Claims Act of 1940, as amended, or any
other laws, rules or regulations relating to the assignment of
any such contract and monies due to or to become due.

                               ARTICLE 9

                         AFFIRMATIVE COVENANTS

     The Borrowers covenant and agree that the Borrowers will, as their
joint and several obligation, duly and punctually pay the principal of,
and interest on, and all other amounts payable with respect to, the Loans
and all other Secured Obligations in accordance with the terms of the
Loan Documents and that until the Commitments have been terminated and
all the Secured Obligations have been paid in full, unless the Lenders
shall otherwise consent in the manner provided for in Section 15.9, each
of the Borrowers will, and will cause each of the Subsidiaries to:

     Section 9.1  Preservation of Corporate Existence and Similar Matters.
Preserve and maintain its registered existence, rights, franchises,
licenses and privileges in the jurisdiction of its organization and
qualify and remain qualified as a foreign entity and authorized to do
business in each jurisdiction in which the character of its properties
or the nature of its business requires such qualification or authorization
(except where any failure so to qualify could not reasonably be expected
to have a Materially Adverse Effect).

     Section 9.2  Compliance with Applicable Law.  Comply in all material
respects with all Applicable Law relating to the Borrowers or such
Subsidiary except to the extent being roceedings and for which reserves
in respect of a Borrower's or such Subsidiary's reasonably anticipated
liability have been established in accordance with GAAP.

     Section 9.3  Maintenance of Property.  In addition to, and not in
derogation of, the requirements of Section 8.7 and of the Security
Documents,

     (a)  protect and preserve all properties material to its business,
including copyrights, patents, trade names and trademarks, and maintain
in good repair, working order and condition in all material respects,
with reasonable allowance for wear and tear, all tangible properties, and

     (b)  from time to time make or cause to be made all needed and
appropriate repairs, renewals, replacements and additions to such
properties necessary for the conduct of its business, so that the business
carried on in connection therewith in the ordinary course and in a manner
consistent with past practices of the Borrowers.

     Section 9.4  Conduct of Business.  At all times conduct its business
in accordance with sound business practices and engage only in the
business(es) described in Schedule 6.1(f).

     Section 9.5  Insurance.  Maintain, in addition to the coverage
required by Section 8.8 and the Security Documents, insurance with
responsible insurance companies against such risks and in such amounts
as is customarily maintained by similar businesses or as may be required
by Applicable Law and in any case, satisfactory to the Administrative
Agent in its reasonable judgment, and from time to time deliver to the
Administrative Agent or any Lender upon its request a detailed list of
the insurance then in effect, stating the names of the insurance companies,
the amounts and rates of the insurance, the dates of the expiration thereof
and the properties and risks covered thereby.

     Section 9.6  Payment of Taxes and Claims. Pay or discharge when due

     (a)  all taxes, assessments and governmental charges or levies imposed
upon it or upon its income or profits or upon any properties belonging to
it, except that real property ad valorem taxes shall be deemed to have been
so paid or discharged if the same are paid before they become delinquent, and

     (b)  all lawful claims of materialmen, mechanics, carriers,
warehousemen and landlords for labor, materials, supplies and rentals which,
if unpaid, might become a Lien on any properties of any Borrower; except
that this Section 9.6 shall not require the payment or  discharge of any
such tax, assessment, charge, levy or claim which is being contested in
good faith by appropriate proceedings and for which reserves in respect
of reasonably anticipated liability have been established in accordance
with GAAP.

     Section 9.7  Accounting Methods and Financial Records.  Maintain a
system of accounting, and keep such books, records and accounts (which
shall be true and complete), as may be required or as may be necessary
to permit the preparation of financial statements in accordance with
GAAP and notify the Administrative Agent promptly, and in any event within
10 days after any such account is opened, of the existence, location,
number and title of any bank account of a Loan Party not listed on
Schedule 6.1(bb).

     Section 9.8  Use of Proceeds.

     (a)  Use the proceeds of the Loans only to repay Debt outstanding
under the Existing Loan Agreement and for working capital and general
business purposes, including, without being limited to, payment of
interest on the Subordinated Notes in accordance with the provisions of
this Agreement, and

     (b)  not use any part of such proceeds to purchase or, to carry or
reduce or retire or refinance any credit incurred to purchase or carry,
any Margin Stock or, in any event, for any purpose which would involve
a violation of Regulation U or of Regulation T or X of the Board of
Governors of the Federal Reserve System, or for any purpose prohibited
by law or by the terms and conditions of this Agreement.

     Section 9.9  Hazardous Waste and Substances; Environmental
Requirements.  In addition to, and not in derogation of, the requirements
of Section 9.2 and of the Security Documents, comply in all material
respects with all Environmental Laws and all Applicable Laws relating
to occupational health and safety (except for instances of noncompliance
that are being contested in good faith by appropriate proceedings if
reserves in respect of any Borrower's or such Subsidiary's reasonably
anticipated liability therefor have been appropriately established),
promptly notify the Administrative Agent of its receipt of any notice of
a violation of any such Environmental Laws or other such Applicable Laws
and indemnify and hold harmless the Administrative Agent and the Lenders
from all loss, cost, damage, liability, claim and expense incurred by or
imposed upon the Administrative Agent or any Lender on account of
a Borrower's failure to perform its obligations under this Section 9.9.

     Section 9.10  Additional Subsidiaries.  Cause each Person that
becomes a domestic Subsidiary of MasTec after the Effective Date,
promptly upon request by the Administrative Agent, to execute and
deliver a Subsidiary Guaranty and a Subsidiary Security Agreement or,
if requested by the Administrative Agent, enter into and cause any such
new Subsidiary or any existing Subsidiary Guarantor to enter into an
amendment to this Agreement or such other documents as may reasonably
be determined by the Administrative Agent to be necessary or desirable
to add such Subsidiary as an additional "Borrower" hereunder, in each
case together with such allonges to the Notes, restated promissory notes,
Financing Statements, legal opinions and other certificates, instruments
and documents as the Administrative Agent may reasonably request.

     Section 9.11  Compliance with Indenture.  Comply with the terms
and provisions of the Indenture and the Subordinated Notes.

                                 ARTICLE 10

                                INFORMATION

     Until the Commitments have been terminated and all the Secured
Obligations have been paid in full, unless the Lenders shall otherwise
consent in the manner set forth in Section 15.9, the Borrowers will furnish
to the Administrative Agent and to each Lender at its offices then
designated for notices pursuant to Section 15.1, the statements, reports,
certificates, and other information provided for in this Article 10.
All written information, reports, statements and other papers and data
furnished to the Administrative Agent or any Lender by or at the request
of the Borrowers, whether pursuant to this Article 10 or any other
provision of this Agreement or of any other Loan Document, shall be, at
the time the same is so furnished, complete and correct in all material
respects to the extent necessary to give the Administrative Agent and the
Lenders true and accurate knowledge of the subject matter.  Specifically,
the Borrowers will so furnish:

     Section 10.1  Financial Statements.

     (a)  Audited Year-End Statements.  As soon as available, but in
any event within 90 days after the end of each Fiscal Year, copies of
the consolidated balance sheet of MasTec and its Consolidated
Subsidiaries as at the end of such Fiscal Year and the related
consolidated statements of income, shareholders' equity and cash flows
of MasTec and its Consolidated Subsidiaries for such Fiscal Year, and
the consolidating balance sheets and related consolidating statements
of income and cash flows for MasTec's NAOperations (in the aggregate)
and for MasTec Brazil and all other Subsidiaries taken together, in
each case setting forth in comparative form the figures for the previous
Fiscal Year, and, as to such consolidated financial statements, reported
on, without qualification, by PriceWaterhouseCoopers or other "Big Five"
independent certified public accountants;

     (b)  Monthly Financial Statements.  As soon as available after the
end of each fiscal month, but in any event within 45 days after the end
of each month in Fiscal Year 2002 and thereafter within 30 days after
the end of each month (or 45 days after the end of any such month that
is the last month of a Fiscal Quarter), copies of the unaudited
consolidated balance sheet of MasTec and its Consolidated Subsidiaries
as at the end of such month and the related unaudited consolidated
statements of income and cash flows for MasTec and its Consolidated
Subsidiaries and the consolidating balance sheets and related
consolidating statements of income and cash flows for MasTec's
NAOperations (in the aggregate) and for MasTec Brazil and all other
Subsidiaries taken together, for such month and for the portion of the
Fiscal Year through such month, certified by a Financial Officer as
presenting fairly the financial condition and results of operations of
MasTec and its Consolidated Subsidiaries and MasTec's NAOperations
(subject to normal year-end audit adjustments) for the applicable
period(s); all such financial statements to be complete and correct
in all material respects and prepared in accordance with GAAP (except,
with respect to interim financial statements, for the omission of notes
and for the effect of normal year-end audit adjustments) applied
consistently throughout the periods reflected therein; and

     (c)  Projections.  As soon as available, but in any event not later
than 60 days prior to the first day of each Fiscal Year beginning after
the Effective Date, Projections for such Fiscal Year in such format and
detail as the Administrative Agent may reasonably specify.

     Section 10.2  Accountants' Certificate.  Together with the financial
statements referred to in Section 10.1(a), a copy of the certificate of
such accountants addressed to MasTec, stating that in making the
examination necessary for the certification of such financial statements,
nothing has come to their attention to lead them to believe that any
Default or Event of Default exists and, in particular, they have no
knowledge of any Default or Event of Default or, if such is not the case,
specifying such Default or Event of Default and its nature.

     Section 10.3  Officer's Certificate.  At the time that the Borrowers
furnish the financial statements pursuant to Section 10.1(a) or 10.1(b)
for each month, a certificate of the President of MasTec or of a
Financial Officer in substantially the form attached hereto as Exhibit D,

     (a)  setting forth as at the end of such month, Fiscal Quarter or
Fiscal Year, as the case may be, the calculations required to establish
whether or not the Borrowers were in compliance with the requirements
of Sections 11.1, 11.2, 11.4 and 11.5 as at the end of each
respective period,

     (b)  the computation of the Leverage Ratio as at the end of each
such Fiscal Quarter or Fiscal Year and the corresponding Applicable
Margins, and

     (c)  stating that, based on a reasonably diligent examination,
no Default or Event of Default exists, or, if such is not the case,
specifying such Default or Event of Default and its nature, when it
occurred, whether it is continuing and the steps being taken by the
Borrowers with respect to such Default or Event of Default.

     Section 10.4  Copies of Other Reports.

     (a)  Promptly upon receipt thereof, copies of all  reports, if
any, submitted to the Borrowers or the Board of Directors of MasTec by
the Borrowers' independent public accountants, including, without
limitation, any management report.

     (b)  As soon as practicable, copies of all financial statements
and reports that MasTec sends to its shareholders generally in their
capacity as such and of all registration statements and all regular or
periodic reports which any Borrower shall file with the Securities
and Exchange Commission or any successor commission.

     (c)  From time to time and as soon as reasonably practicable
following each request, such data, certificates, reports, statements,
opinions of counsel, documents or further information regarding the
business, assets, liabilities, financial condition, results of
operations or business prospects of a Borrower or any Subsidiary as
the Administrative Agent or any Lender may reasonably request and that
a Borrower has or (except in the case of legal opinions relating to the
perfection or priority of the Security Interest) without unreasonable
expense can obtain; provided, however, that the Lenders shall, to the
extent reasonably practicable, coordinate examinations of the Borrowers'
records by their respective internal examiners.  The rights of the
Administrative Agent and the Lenders under this Section 10.4 are in
addition to and not in derogation of their rights under any other
provision of this Agreement or of any other Loan Document.

     (d)  If requested by the Administrative Agent or any Lender,
statements in conformity with the requirements of Federal Reserve
Form G-3 or U-1 referred to in Regulation U.

     Section 10.5   Notice of Litigation and Other Matters.  Prompt
notice of:

     (a)  the commencement, to the extent a Borrower is aware of the
same, of all proceedings and investigations by or before any
governmental or nongovernmental body and all actions and proceedings
in any court or before any arbitrator against or in any other way
relating to or affecting any Borrower, any of its Subsidiaries or
any of a Borrower's or any of its Subsidiaries' properties, assets
or businesses, which is reasonably likely to, singly or together with
other pending proceedings or investigations, result in the occurrence
of a Default or an Event of Default, or have a Materially Adverse
Effect,

     (b)  any amendment of the articles of incorporation or by-laws or
other organizational documents of a Borrower or any of its Subsidiaries,

     (c)  any change in the business, assets, liabilities, financial
condition, results of operations or business prospects of a Borrower
or any of its Subsidiaries which has had or is reasonably likely to
have, singly or in the aggregate, a Materially Adverse Effect and any
change in the executive officers of a Borrower,

     (d)  the receipt of any notice from or giving of any notice to
the trustee under the Indenture, together with a copy of such
notice, and

     (e)  any Default or Event of Default and any event which constitutes
or which with the passage of time or giving of notice or both would
constitute a default or event of default by a Borrower or any of its
Subsidiaries under any material agreement (other than this Agreement)
to which such Borrower or any of its Subsidiaries is a party or by
which any Borrower, any of its Subsidiaries or any Borrower's or any
Subsidiary's properties may be bound.

     Section 10.6  ERISA.  As soon as possible and in any event within
30 days after a Borrower knows, or has reason to know, that:

     (a)  any ERISA Event with respect to a Benefit Plan has occurred
or will occur, or

     (b)  the aggregate present value of the Unfunded Vested Accrued
Benefits under all Benefit Plans is equal to an amount in excess of $0, or

     (c)  a Borrower or any Subsidiary is in "default" (as defined in
Section 4219(c)(5) of ERISA) with respect to payments to a Multiemployer
Benefit Plan required by reason of a Borrower's or such Subsidiary's
complete or partial withdrawal (as described in Section 4203 or 4205 of
ERISA) from such Multiemployer Plan, to the Administrative Agent a
certificate of the President of MasTec or a Financial Officer setting
forth the details of such event and the action which is proposed to be
taken with respect thereto, together with any notice or filing  which
may be required by the PBGC or other agency of the United States
government with respect to such event.

                                ARTICLE 11

                            NEGATIVE COVENANTS

     Until the Commitments have been terminated and all the Secured
Obligations have been paid in full, unless the Lenders shall otherwise
consent in the manner set forth in Section 15.9, the Borrowers will not
directly or indirectly and, in the case of Sections 11.2 through 11.11,
will not permit any other Loan Parties to:

     Section 11.1  Financial Covenants.

     (a)  Tangible Net Worth.  Permit consolidated Tangible Net Worth of
MasTec's NAOperations at any time on or after March 31, 2002, to be less
than $180,000,000 plus an amount equal to 50% of consolidated Net Income
(but without deduction for any Net Loss) of MasTec's NAOperations for the
period from January 1, 2002 through the date of determination, treated as
a single accounting period.

     (b)  Fixed Charge Coverage Ratio.  Permit the Fixed Charge Coverage
Ratio at any time to be less than 2.00 to 1, as measured for (1) the
successive periods of three, four, five, six, seven, eight, nine, ten and
eleven consecutive calendar months beginning January 1, 2002 and (2) each
period of 12 consecutive months ending on or after December 31, 2002.

     Section 11.2  Debt.  Create, assume, or otherwise become or remain
obligated in respect of, or permit or suffer to exist or to be created,
assumed or incurred or to be outstanding any Debt, except that this
Section 11.2 shall not apply to:

     (a)  Debt of the Loan Parties represented by the Loan Documents,

     (b)  Subordinated Debt,

     (c)  Debt of the Canadian Entity owing to the Canadian Funding Agent,

     (d)  Debt reflected on Schedule 6.1(j) and refinancings thereof that
do not result in an increase in the principal amount of any such Debt
outstanding on the date of refinancing or in any other Person becoming
obligated thereon, but excluding any such scheduled Debt that is to be
paid in full on the Effective Date, and

     (e)  other Debt (including, without being limited to, any Debt
assumed in connection with any Acquisition) in an aggregate principal
amount outstanding at any time not to exceed $15,000,000.

     Section 11.3  Guarantees.  Become or remain liable with respect
to any Guaranty of any obligation of any other Persons, except as
listed on Schedule 6.1(j) or pursuant to a Guaranty by a Borrower or
any Subsidiary of the obligations of a Loan Party.

     Section 11.4  Investments and Acquisitions.  (a) Acquire after
the Agreement Date, any Investment or, after the Agreement Date,
maintain any Investment other than Permitted Investments, except that
subject to the provisions of Section 11.4(c) and so long as no Event
of Default exists before or immediately after giving effect thereto,
the Loan Parties may make Investments of up to $25,000,000 in any
Fiscal Year, provided that Availability, after giving effect to any
such Investment, is at least $35,000,000.

     (b)  Make any Acquisition after the Agreement Date, except that
subject to the provisions of Section 11.4(d), so long as no Event of
Default exists before or immediately after giving effect thereof, the
Loan Parties' may make Acquisitions of (i) more than 50% of the capital
stock of any other Person organized under the laws of the United States
of America or any state thereof (which thereupon becomes a Subsidiary)
or (ii) all or substantially all of the assets of a Business Unit
located in the United States, provided, that:

         (A)  the cash portion of the Purchase Price of such Acquisition
does not exceed $15,000,000 (or, prior to delivery in accordance with the
provisions of Section 10.1 of financial statements for the Fiscal Quarter
ending June 30, 2002, $5,000,000) and Availability after giving effect to
any such Acquisition shall be at least $35,000,000,

         (B)  MasTec or the applicable Loan Party has made available to
the Administrative Agent, not later than fourteen days prior to the
proposed date of such Acquisition, the results of any investigation of
the target performed by or on behalf of such Loan Party, environmental
assessment reports if any real property is to be acquired, copies of the
Acquisition documents, and historical financial statements of the target
for at least the three previous years,

         (C)  the Administrative Agent shall have received evidence
satisfactory to it that no Default of Event of Default has occurred and
is continuing or would exist after giving effect to such transaction and
of the Loan Parties' continued compliance with the provisions of this
Agreement and the other Loan Documents, including, without being limited
to, the provisions of Sections 9.4, 9.11 and 11.1, on a pro forma basis
after giving effect to such Acquisition,

         (D)  to the extent financed with Debt other than Loans, such
Debt shall be Subordinated Debt payable to the seller,

         (E)  such Acquisition shall not be "hostile" or contested,

         (F)  the Administrative Agent shall have received evidence
satisfactory to it demonstrating on a pro forma basis that EBITDA
of the target for the period of 12 consecutive calendar months ended
nearest to the date of determination, is at least equal to the sum of
interest expense and scheduled principal payments on any Debt incurred
in connection with payment of the Purchase Price (including Loans),

         (G)  as requested by the Administrative Agent or the Required
Lenders, any new Subsidiary shall have executed and delivered the
Subsidiary Guaranty and a Subsidiary Security Agreement, or all Loan
Parties, as appropriate, and such new Subsidiary shall have executed and
delivered an amendment to this Agreement sufficient to cause such new
Subsidiary to become a "Borrower" hereunder, and in either case shall
have delivered or caused to be delivered as to such Subsidiary the items
referred to in Sections 5.1(a)(3), (4), (5), (6), and (8) and an opinion
of counsel for such Subsidiary as to such matters in connection with the
transactions contemplated by the Subsidiary Guaranty and Subsidiary
Security Agreement or such amendment to this Agreement as the
Administrative Agent may reasonably request, and

         (H)  if such Acquisition is to be consummated on or after August
15, 2002, financial statements shall have been delivered to the
Administrative Agent and the Lenders for the Fiscal Quarter ending June
30, 2002, in compliance with the provisions of Section 10.1.

"Purchase Price" means an amount equal to the total consideration paid
for such Acquisition, including all cash payments (whether classified as
purchase price, noncompete payments, consulting payments, "earn out" or
otherwise and without regard to whether such amount is paid in whole or in
part at the closing of the Acquisition or over time thereafter, but
excluding any finance charges attributable to deferred payments, any salary
or other employment compensation paid to a seller for the purpose of
retaining such seller's services as an active employee of a Borrower or a
Subsidiary and, upon the Administrative Agent's determination to such
effect, any "earn out" based upon achievement of a material improvement in
financial performance of the target), the remaining principal amount of
all Acquired Debt and of any Subordinated Debt owing to the seller, and the
value (as determined by the board of directors of MasTec, including
pursuant to the applicable purchase agreement between the relevant Borrower
and the seller, in the case of any property, the fair value of which is not
readily ascertainable) of all other property, other than capital stock or
options to acquire such capital stock of MasTec, transferred by MasTec to
the seller.

A determination made for purposes of this Section 11.4 on a pro forma basis
shall be based upon actual MasTec's NAOperations and actual results of
operations of the target for the same period of 12 months ended prior to
the date of determination, as if such Acquisition had occurred (and any
related Debt had been incurred) on the first day of such 12-month period,
as adjusted with the approval of the Administrative Agent to reflect
verifiable, adequately documented severance payments and reductions in
officer and employee compensation, insurance expenses, interest expense
and rental expense that will be realized effective upon completion of
such Acquisition.

     (c)  Notwithstanding any provision of this Agreement to the
contrary, in connection with any merger (or other distribution of the
assets) of a Subsidiary that is not a Loan Party with and into (or to) a
Loan Party, or any Acquisition by a Borrower, whether by purchase of
stock, merger, or purchase of assets, and whether in a single transaction
or series of related transactions, the Administrative Agent shall have
the right to determine in its reasonable credit judgment whether any
Accounts so acquired shall be included in the Borrowing Base (subject to
the other applicable provisions of this Agreement).  In connection with
such determination, the Administrative Agent may obtain, at the Borrowers'
expense, such appraisals, commercial finance exams and other assessments
of such Accounts and related Inventory, Equipment and Real Estate as it
may deem desirable.

     (d)  Notwithstanding the other provisions of this Section 11.4 and
of Section 11.6, the maximum aggregate amount of Investments,
Acquisitions, Restricted Payments and Restricted Distributions made (i)
during the period from the Agreement Date through the timely delivery of
financial statements in accordance with the provisions of Section 10.1
for the Fiscal Quarter ending June 30, 2002, shall not exceed
$15,000,000 and (ii) in any Fiscal Year shall not exceed $25,000,000.

     Section 11.5  Capital Expenditures.  Make or incur any Capital
Expenditures in the aggregate in excess of $50,000,000 for any
Fiscal Year.

     Section 11.6  Restricted Distributions and Payments, Etc.  Declare
or make any Restricted Distribution or Restricted Payment in any Fiscal
Year which, when added to all other Restricted Distributions, and
Restricted Payments made in the same Fiscal Year of MasTec, would
(subject to the provisions of Section 11.4(d)) exceed $25,000,000;
provided, that after giving effect to any such payment, no Event of
Default shall exist, Availability is at least equal to $35,000,000, and
MasTec shall pay dividends (if any are declared) only in shares of its
own capital stock.

     Section 11.7  Merger, Consolidation and Sale of Assets.  Merge or
consolidate with any other Person or sell, lease or transfer or otherwise
dispose of all or a substantial portion of its assets to any Person other
than sales of Inventory in the ordinary course of business, except that
any Loan Party may transfer assets to another Loan Party and may merge
with and into another Loan Party (provided that MasTec shall be the
surviving corporation of any merger to which it is a party) and, subject
to the provisions of Section 11.4(b), any Subsidiary may merge into a
Loan Party with such Loan Party as the surviving corporation.

     Section 11.8  Transactions with Affiliates.  Effect any transaction
with any Affiliate on a basis less favorable to a Loan Party than would
be the case if such transaction had been effected with a Person not an
Affiliate.

     Section 11.9  Liens.  Create, assume or permit or suffer to exist or
to be created or assumed any Lien on any of the Collateral or its other
assets, other than Liens listed in clauses (a) through (h) of the
definition "Permitted Liens" and (a) Liens securing acquired Debt, which
Liens affect solely capital or fixed assets (and not Accounts or Inventory
or proceeds thereof) of the Business Unit Acquired, existing on the date
of the related Acquisition and not created in contemplation thereof,
(b) Purchase Money Liens (including Capitalized Lease Obligations)
securing Debt otherwise permitted pursuant to Section 11.2, and (c) Liens
encumbering assets of the Canadian Entity for the benefit of The Bank
of Nova Scotia.

     Section 11.10  Sales and Leasebacks.  Enter into any arrangement
with any Person providing for a Loan Party's leasing from such Person any
real or personal property which has been or is to be sold or transferred,
directly or indirectly, by a Loan Party to such Person.

     Section 11.11  Amendments of Other Agreements.  Amend the interest
rate or principal amount or schedule of payments of principal and
interest with respect to any Debt (other than the Secured Obligations) or
any dividend rate or redemption schedule, applicable to any preferred
stock of a Loan Party, other than to reduce the interest or dividend rate
or to extend any such schedule of payments or redemption schedule, or
amend or cause or permit to be amended in any material respect or in any
respect that may be adverse to the interests of the Administrative Agent
or the Lenders, (i) the Indenture or any other agreement at any time
governing Subordinated Debt, (ii) the articles or certificate of
incorporation or other organizational documents of any Loan Party, or
(iii) the general indemnity agreement in effect on the Agreement Date
between MasTec and Liberty Mutual Bond Services, Inc. and the related
intercreditor agreement.

                            ARTICLE 12

                             DEFAULT

     Section 12.1  Events of Default.  Each of the following shall
constitute an Event of Default, whatever the reason for such event and
whether it shall be voluntary or involuntary or be effected by operation
of law or pursuant to any judgment or order of any court or any order,
rule or regulation of any governmental or nongovernmental body:

     (a)  Default in Payment.  The Borrowers shall default in any payment
of principal of or interest on any Loan or any Note when and as due
(whether at maturity, by reason of acceleration or otherwise).

     (b)  Other Payment Default.  The Borrowers shall default in the
payment, as and when due, of principal of or interest on, any other
Secured Obligation, and such default shall continue for a period of five
days after written notice thereof has been given to the Borrowers by
the Administrative Agent.

     (c)  Misrepresentation.  Any representation or warranty made or
deemed to be made by the Borrowers under this Agreement or any Loan
Document, or any amendment hereto or thereto, shall at any time prove
to have been incorrect or misleading in any material respect when made.

     (d)  Default in Performance.  The Borrowers shall default in the
performance or observance of any term, covenant, condition or agreement
to be performed by the Borrowers, contained in

         (i)  Sections 8.1, 8.2, 8.5, 8.7, 8.8, 10.1, 10.5 or 10.6 or
Articles 9 or 11, and the Administrative Agent shall have delivered to
the Borrowers written notice of such default, or

         (ii) this Agreement (other than as specifically provided for
otherwise in this Section 12.1) and such default shall continue for a
period of (A) five days in the case of default under Section 8.11 or
8.12 (other than Section 8.12(g)) or (B) 15 days in the case of each
other default, in each case after written notice thereof has been
given to the Borrowers by the Administrative Agent.

     (e)  Debt Cross-Default.

         (i)  A Borrower or any Subsidiary shall fail to pay when due
and payable (and within any applicable cure or grace period) the
principal of or interest on any Debt (other than the Loans) in an
amount in excess of $2,500,000, or

         (ii)  the maturity of any such Debt outstanding in a principal
amount greater than $2,500,000 shall have (A) been accelerated in
accordance with the provisions of any indenture, contract or instrument
providing for the creation of or concerning such Indebtedness, or (B) been
required to be prepaid prior to the stated maturity thereof, including,
without being limited to, upon a "Change of Control" as defined in the
Indenture, or

         (iii) any event shall have occurred and be continuing which
would permit any holder or holders of such Debt outstanding in an amount
in excess of $2,500,000, any trustee or agent acting on behalf of such
holder or holders or any other Person so to accelerate such maturity,
and the Borrowers shall have failed to cure such default prior to the
expiration of any applicable cure or grace period.

     (f)  Other Cross-Defaults.  A Borrower or any Subsidiary shall
default in the payment when due, or in the performance or observance,
of any obligation or condition of any agreement, contract or lease
(other than this Agreement, the Security Documents or any such
agreement, contract or lease relating to Debt), if the existence of
any such defaults, singly or in the aggregate, could reasonably be
expected to have a Materially Adverse Effect, provided, that for the
purposes of this provision, where such a default could result only
in a monetary loss, a Materially Adverse Effect shall not be deemed
to have occurred unless the aggregate of such losses would exceed
$2,500,000.

     (g)  Voluntary Bankruptcy Proceeding.  A Borrower or any
Subsidiary shall

         (i)   commence a voluntary case under the federal bankruptcy
laws (as now or hereafter in effect),

         (ii)  file a petition seeking to take advantage of any other
laws, domestic or foreign, relating to bankruptcy, insolvency,
reorganization, winding up or composition for adjustment of debts,

         (iii) consent to or fail to contest in a timely and appropriate
manner any petition filed against it in an involuntary case under such
bankruptcy laws or other laws,

         (iv)  apply for or consent to, or fail to contest in a timely
and appropriate manner, the appointment of, or the taking of possession
by, a receiver, custodian, trustee, or liquidator of itself or of a
substantial part of its property, domestic or foreign,

         (v)  admit in writing its inability to pay its debts as they
become due,

        (vi)  make a general assignment for the benefit of creditors, or

        (vii) take any corporate or other official action for the purpose
of authorizing any of the foregoing.

     (h)  Involuntary Bankruptcy Proceeding.  A case or other proceeding
shall be commenced against a Borrower or any Subsidiary in any court of
competent jurisdiction seeking

         (i)  relief under the federal bankruptcy laws (as now or
hereafter in effect) or under any other laws, domestic or foreign,
relating to bankruptcy, insolvency, reorganization, winding up or
adjustment of debts,

         (ii) the appointment of a trustee, receiver, custodian,
liquidator or the like of a Borrower, any Subsidiary or of all or any
substantial part of the assets, domestic or foreign, of a Borrower or
any Subsidiary, and such case or proceeding shall continue undismissed
or unstayed for a period of 60 consecutive calendar days, or an order
granting the relief requested in such case or proceeding against such
Borrower or Subsidiary (including, but not limited to, an order for
relief under such federal bankruptcy laws) shall be entered.

     (i)  Loan Documents.  Any "Event of Default" under any Loan
Document (other than this Agreement) shall occur or a Borrower shall
default in the performance or observance of any material term,
covenant, condition or agreement contained in, or the payment of any
other sum covenanted to be paid by the Borrowers under, any Loan
Document (other than this Agreement) that does not expressly provide
for "Events of Default," or any material provision thereof (in each
case, after giving effect to any applicable grace or cure period) shall
cease to be valid and binding.

     (j)  Failure of Agreements.  A Loan Party shall challenge the
validity and binding effect of any provision of any Loan Document after
delivery thereof hereunder or shall state in writing its intention to
make such a challenge, or any Security Document, after delivery thereof
hereunder, shall for any reason (except to the extent permitted by the
terms thereof) cease to create a valid and perfected first priority
Lien (except for Permitted Liens) on, or security interest in, any of
the Collateral purported to be covered thereby.

     (k)  Judgment.  One or more final, unappealable judgments or orders
for the payment of money in an aggregate amount that exceeds the insurance
(including deductibles or self-insurance amounts) therefor as to which
the carrier shall not have disputed or disclaimed coverage, by $1,000,000
shall be entered against a Borrower by any court and such judgments or
orders shall continue undischarged or unstayed for 10 days.

     (l)  Attachment.  A warrant or writ of attachment or execution or
similar process which exceeds $2,500,000 in value shall be issued against
any property of a Borrower and such warrant or process shall continue
undischarged or unstayed for 10 days.

     (m)  ERISA.  In addition to the breach of any other representation
and warranty, any ERISA Event with respect to a Benefit Plan shall occur.

     (n)  Qualified Audits.  The independent certified public accountants
retained by MasTec shall refuse to deliver an opinion in accordance with
Section 10.1(a) with respect to the annual consolidated financial
statements of MasTec and its Consolidated Subsidiaries.

     (o)  Change of Control.  MasTec shall cease to own, directly or
indirectly, 100% of the issued and outstanding stock of each other Loan
Party (except as otherwise expressly permitted pursuant to Section 8.7)
or a "Change of Control" for purposes of the Indenture shall occur.

     Section 12.2  Remedies.

     (a)  Automatic Acceleration and Termination of Facilities.  Upon
the occurrence of an Event of Default specified in Section 12.1(g) or (h),
(i) the principal of and the interest on the Loans and any Note at the
time outstanding, and all other amounts owed to the Administrative Agent
or the Lenders under this Agreement or any of the other Loan Documents
and all other Secured Obligations, shall thereupon become due and payable
without presentment, demand, protest, or other notice of any kind, all
of which are expressly waived, anything in this Agreement or any of the
Loan Documents to the contrary notwithstanding, and (ii) the Commitments
and the right of the Borrowers to request Borrowings under this Agreement
shall immediately terminate.

     (b)  Other Remedies.  If any Event of Default shall have occurred,
and during the continuance of any Event of Default, the Administrative
Agent may, and at the direction of the Required Lenders in their sole
and absolute discretion shall, do any of the following:

     (i)   declare the principal of and interest on the Loans and any
Note at the time outstanding, and all other amounts owed to the
Administrative Agent or the Lenders under this Agreement or any of the
other Loan Documents and all other Secured Obligations, to be forthwith
due and payable, whereupon the same shall immediately become due and
payable without presentment, demand, protest or other notice of any
kind, all of which are expressly waived, anything in this Agreement
or the Loan Documents to the contrary notwithstanding;

     (ii)  terminate the Commitments and any other right of the
Borrowers to request borrowings hereunder;

     (iii) notify, or request the Borrowers to notify, in writing
or otherwise, any Account Debtor or obligor with respect to any one
or more of the Accounts to make payment to the Administrative Agent,
for the benefit of the Lenders, or any agent or designee of the
Administrative Agent, at such address as may be specified by the
Administrative Agent and if, notwithstanding the giving of any
notice, any Account Debtor or other such obligor shall make payments
to the Borrowers, the Borrowers shall hold all such payments received
in trust for the Administrative Agent, for the account of the Lenders,
without commingling the same with other funds or property of, or held
by, the Borrowers, and shall deliver the same to the Administrative
Agent or any such agent or designee of the Administrative Agent
immediately upon receipt by the Borrowers in the identical form
received, together with any necessary endorsements;

     (iv)  settle or adjust disputes and claims directly with Account
Debtors and other obligors on Accounts for amounts and on terms which
the Administrative Agent considers advisable and in all such cases only
the net amounts received by the Administrative Agent, for the account
of the Lenders, in payment of such amounts, after deductions of costs
and attorneys' fees, shall constitute Collateral and the Borrowers
shall have no further right to make any such settlements or adjustments
or to accept any returns of merchandise;

     (v)   enter upon any premises in which Inventory or Equipment may
be located and, without resistance or interference by the Borrowers,
take physical possession of any or all thereof and maintain such
possession on such premises or move the same or any part thereof to
such other place or places as the Administrative Agent shall choose,
without being liable to the Borrowers on account of any loss, damage
or depreciation that may occur as a result thereof, so long as the
Administrative Agent shall act reasonably and in good faith;

     (vi)  require the Borrowers to and the Borrowers shall, without
charge to the Administrative Agent or any Lender, assemble the Inventory
or Equipment and maintain or deliver it into the possession of the
Administrative Agent or any agent or representative of the
Administrative Agent at such place or places as the Administrative
Agent may designate and as are reasonably convenient to both the
Administrative Agent and the applicable Borrower;

     (vii)  at the expense of the Borrowers, cause any of the Inventory
or Equipment to be placed in a public or field warehouse, and the
Administrative Agent shall not be liable to the Borrowers on account of
any loss, damage or depreciation that may occur as a result thereof, so
long as the Administrative Agent shall act reasonably and in good faith;

     (viii) without notice, demand or other process, and without payment
of any rent or any other charge, enter any of the Borrowers' premises
and, without breach of the peace, until the Administrative Agent, on
behalf of the Lenders, completes the enforcement of its rights in the
Collateral, take possession of such premises or place custodians in
exclusive control thereof, remain on such premises and use the same
and any of the Borrowers' equipment, for the purpose of (A) completing
any work in process, preparing any Inventory for disposition and
disposing thereof, and (B) collecting any Account, and the Administrative
Agent for the benefit of the Lenders is hereby granted a license or
sublicense and all other rights as may be necessary, appropriate or
desirable to use the Proprietary Rights in connection with the foregoing,
and the rights of the Borrowers under all licenses, sublicenses and
franchise agreements shall inure to the Administrative Agent for the
benefit of the Lenders (provided, however, that any use of any federally
registered trademarks as to any goods shall be subject to the control
as to the quality of such goods of the owner of such trademarks and
the goodwill of the business symbolized thereby);

     (ix)  exercise any and all of its rights under any and all of the
Security Documents;

     (x)   apply any Collateral consisting of cash to the payment of
the Secured Obligations in any order in which the Administrative Agent,
on behalf of the Lenders, may elect or use such cash in connection with
the exercise of any of its other rights hereunder or under any of the
Security Documents;

     (xi)  establish or cause to be established one or more Lockboxes or
other arrangements for the deposit of proceeds of Accounts and other
Collateral, and, in such case, the Borrowers shall cause to be forwarded
to the Administrative Agent at the Administrative Agent's Office, on a
daily basis, copies of all checks and other items of payment and deposit
slips related thereto deposited in such Lockboxes, together with
collection reports in form and substance satisfactory to the
Administrative Agent; and

     (xii) exercise all of the rights and remedies of a secured party
under the UCC and under any other Applicable Law, including, without
limitation, the right, without notice except as specified below and
with or without taking possession thereof, to sell the Collateral or
any part thereof in one or more parcels at public or private sale, at
any location chosen by the Administrative Agent, for cash, on credit or
for future delivery, and at such price or prices and upon such other
terms as the Administrative Agent may deem commercially reasonable.
Each Borrower agrees that, to the extent notice of sale shall be
required by law, at least 10 days' notice to the Borrowers of the time
and place of any public sale or the time after which any private sale
is to be made shall constitute reasonable notification, but notice given
in any other reasonable manner or at any other reasonable time shall
constitute reasonable notification.  The Administrative Agent shall not
be obligated to make any sale of Collateral regardless of notice of
sale having been given.  The Administrative Agent may adjourn any public
or private sale from time to time by announcement at the time and place
fixed therefor, and such sale may, without further notice, be made at the
time and place to which it was so adjourned.

     Section 12.3  Application of Proceeds.  All proceeds from each sale
of, or other realization upon, all or any part of the Collateral
following an Event of Default shall be applied or paid over in accordance
with the provisions of Section 4.18.

The Borrowers shall remain liable for and will pay, on demand, any
deficiency remaining in respect of the Secured Obligations, together with
interest thereon at a rate per annum equal to the highest rate then
payable hereunder on such Secured Obligations (whether or not such amount
is allowed as a claim in any bankruptcy or insolvency proceeding), which
interest shall constitute part of the Secured Obligations.

     Section 12.4  Power of Attorney.  In addition to the authorizations
granted to the Administrative Agent under Section 9.13 or under any other
provision of this Agreement or of any other Loan Document, during the
continuance of an Event of Default, each Borrower hereby irrevocably
designates, makes, constitutes and appoints the Administrative Agent (and
all Persons designated by the Administrative Agent from time to time) as
such Borrower's true and lawful attorney, and agent in fact, and the
Administrative Agent, or any agent of the Administrative Agent, may,
without notice to the Borrowers, and at such time or times as the
Administrative Agent or any such agent in its sole discretion may
determine, in the name of a Borrower, the Administrative Agent or the
Lenders,

     (a)  demand payment of the Accounts,
     (b)  enforce payment of the Accounts by legal proceedings or
          otherwise,
     (c)  exercise all of any Borrower's rights and remedies with respect
          to the collection of Accounts,
     (d)  settle, adjust, compromise, extend or renew any or all of
          the Accounts,
     (e)  settle, adjust or compromise any legal proceedings brought to
          collect the Accounts,
     (f)  discharge and release the Accounts or any of them,
     (g)  prepare, file and sign the name of a Borrower on any proof of
          claim in bankruptcy or any similar document against any Account
          Debtor,
     (h)  prepare, file and sign the name of a Borrower on any notice
          of Lien, assignment or satisfaction of Lien, or similar document
          in connection with any of the Collateral,
     (i)  endorse the name of a Borrower upon any chattel paper, document,
          instrument, notice, freight bill, bill of lading or similar
          document or agreement relating to the Accounts, the Inventory,
          the Equipment or any other Collateral,
     (j)  use the stationery of the Borrowers and sign the names of the
          Borrowers to verifications of the Accounts and on any notice
          to the Account Debtors,
     (k)  open the Borrowers' mail,
     (l)  notify the post office authorities to change the address for
          delivery of the Borrowers' mail to an address designated by the
          Administrative Agent, and
     (m)  use the information recorded on or contained in any data
          processing equipment and computer hardware and software relating
          to the Accounts, Inventory, Equipment or other Collateral to
          which any Borrower has access.

     Section 12.5  Miscellaneous Provisions Concerning Remedies.

     (a)  Rights Cumulative.  The rights and remedies of the
Administrative Agent and the Lenders under this Agreement, the Notes and
each of the Loan Documents shall be cumulative and not exclusive of any
rights or remedies which it or they would otherwise have.  In exercising
such rights and remedies the Administrative Agent and the Lenders may be
selective and no failure or delay by the Administrative Agent or any Lender
in exercising any right shall operate as a waiver of it, nor shall any
single or partial exercise of any power or right preclude its other or
further exercise or the exercise of any other power or right.

     (b)  Waiver of Marshalling.  Each Borrower hereby waives any right
to require any marshalling of assets and any similar right.

     (c)  Limitation of Liability.  Nothing contained in this Article 12
or elsewhere in this Agreement or in any of the Loan Documents shall be
construed as requiring or obligating the Administrative Agent, any Lender
or any agent or designee of the Administrative Agent or any Lender to make
any demand, or to make any inquiry as to the nature or sufficiency of any
payment received by it, or to present or file any claim or notice or take
any action, with respect to any Account or any other Collateral or the
monies due or to become due thereunder or in connection therewith, or to
take any steps necessary to preserve any rights against prior parties,
and the Administrative Agent, the Lenders and their agents or designees
shall have no liability to the Borrowers for actions taken pursuant to
this Article 12, any other provision of this Agreement or any of the
Loan Documents so long as the Administrative Agent or such Lender
shall act in good faith and in a commercially reasonable manner.

     (d)  Appointment of Receiver.  In any action under this Article 12,
the Administrative Agent shall be entitled during the continuance of an
Event of Default, to the fullest extent permitted by Applicable Law, to
the appointment of a receiver, without notice of any kind whatsoever, to
take possession of all or any portion of the Collateral and to exercise
such power as the court shall confer upon such receiver.

     Section 12.6  Trademark License.  Each Borrower hereby grants to the
Administrative Agent for its benefit as Administrative Agent and for the
benefit of the Lenders, the nonexclusive right and license to use its
trademarks for the purposes set forth in Section 12.2(b)(viii) and for
the purpose of enabling the Administrative Agent to realize on the
Collateral and to permit any purchaser of any portion of the Collateral
through a foreclosure sale or any other exercise of the Administrative
Agent's rights and remedies under this Agreement and the other Security
Documents to use, sell or otherwise dispose of the Collateral bearing
any such trademark.  Such right and license is granted free of charge,
without the requirement that any monetary payment whatsoever be made to
the Borrowers or any other Person by the Lenders or the Administrative
Agent or any purchaser or purchasers of the Collateral.  The Borrowers
hereby represent, warrant, covenant and agree that they presently have,
and shall continue to have, the right, without the approval or consent
of others, to grant the license set forth in this Section 12.6.

                               ARTICLE 13

                              ASSIGNMENTS

     Section 13.1  Successors and Assigns; Participations.

     (a)  This Agreement shall be binding upon and inure to the benefit
of the Borrowers, the Lenders, the Administrative Agent, all future
holders of the Notes, and their respective successors and assigns, except
that the Borrowers may not assign or transfer any of their rights or
obligations under this Agreement without the prior written consent of
each Lender.

(b)	Each Lender may with the consent of the Administrative Agent and,
so long as no Default or Event of Default has occurred and is continuing,
MasTec, which consent shall not be unreasonably withheld or delayed,
assign to one or more Eligible Assignees all or a portion of its interests,
rights and obligations under this Agreement (including, without limitation,
all or a portion of the Loans at the time owing to it and the Notes held by
it) (provided that no consent shall be required with respect to any
assignment to an Eligible Assignee as part of the assigning Lender's
transfer of all or substantially all of its assets of a similar type in
connection with any acquisition or divestiture or otherwise); provided,
however, that (i) each such assignment shall be of a constant, and not a
varying, percentage of all the assigning Lender's rights and obligations
under this Agreement, (ii) the amount of the Commitment of the assigning
Lender that is subject to each such assignment (determined as of the date
the Assignment and Acceptance with respect to such assignment is delivered
to the Administrative Agent) shall in no event be less than the Minimum
Commitment (or the assigning Lender's entire remaining Commitment, if less)
(except that a Lender may assign less than the Minimum Commitment to its
Affiliate), (iii) in the case of a partial assignment, the amount of
the Commitment that is retained by the assigning Lender (determined as of
the date the Assignment and Acceptance with respect to such assignment is
delivered to the Administrative Agent) shall in no event be less than the
Minimum Commitment, (iv) the parties to each such assignment shall execute
and deliver to the Administrative Agent, for its acceptance and recording
in the Register an Assignment and Acceptance, together with any Note or
Notes subject to such assignment and the assigning Lender shall pay an
assignment fee in the amount of $3,500, (v) such assignment shall not,
without the consent of the Borrowers, require the Borrowers to file a
registration statement with the Securities and Exchange Commission or
apply to or qualify the Loans or the Notes under the blue sky laws of any
state, and (vi) the representation contained in Section 13.2 hereof shall
be true with respect to any such proposed assignee.  Upon such execution,
delivery, acceptance and recording, or from and after the effective date
specified by the Administrative Agent (which effective date shall not be
later than five Business Days after the delivery thereof), (A) the assignee
thereunder shall be a party hereto and, to the extent provided in such
Assignment and Acceptance, have the rights and obligations of a Lender
hereunder, and (B) the Lender assignor thereunder shall, to the extent
provided in such assignment, be released from its obligations under
this Agreement.

     (c)  By executing and delivering an Assignment and Acceptance, the
Lender assignor thereunder and the assignee thereunder confirm to and
agree with each other and the other parties hereto as follows:  (i) other
than the representation and warranty that it is the legal and beneficial
owner of the interest being assigned thereby free and clear of any
adverse claim, such Lender assignor makes no representation or warranty
and assumes no responsibility with respect to any statements, warranties
or representations made in or in connection with this Agreement or the
execution, legality, validity, enforceability, genuineness, sufficiency
or value of this Agreement or any other instrument or document furnished
pursuant hereto; (ii) such Lender assignor makes no representation or
warranty and assumes no responsibility with respect to the financial
condition of the Borrowers or the performance or observance by the
Borrowers of any of their obligations under this Agreement or any other
instrument or document furnished pursuant hereto; (iii) such assignee
confirms that it has received a copy of this Agreement, together with
copies of the financial statements referred to in Section 6.1(n) and
such other documents and information as it has deemed appropriate to
make its own credit analysis and decision to enter into such Assignment
and Acceptance; (iv) such assignee will, independently and without
reliance upon the Administrative Agent, such Lender assignor or any other
Lender, 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; (v) such assignee
confirms that it is an Eligible Assignee; (vi) such assignee appoints and
authorizes the Administrative Agent to take such action as agent on its
behalf and to exercise such powers under this Agreement and the other Loan
Documents as are delegated to the Administrative Agent by the terms hereof
and thereof, together with such powers as are reasonably incidental
thereto; and (vii) such assignee agrees that it will perform in accordance
with their terms all of the obligations which by the terms of this
Agreement are required to be performed by it as a Lender.

     (d)  The Administrative Agent shall maintain a copy of each
Assignment and Acceptance delivered to it and a register for the
recordation of the names and addresses of the Lenders and the Commitment
and Ratable Share of, and principal amount of the Loans and Letter of
Credit Obligations owing to, each Lender from time to time (the
"Register").  The entries in the Register shall be conclusive, in the
absence of manifest error, and the Borrowers, the Administrative Agent
and the Lenders may treat each person whose name is recorded in the
Register as a Lender hereunder for all purposes of this Agreement.  The
Register shall be available for inspection by the Borrowers or any
Lender at any reasonable time and from time to time upon reasonable
prior notice.

     (e)  Upon its receipt of an Assignment and Acceptance executed by
an assigning Lender and an Eligible Assignee and, if MasTec's consent is
required, MasTec, together with any Note subject to such assignment, the
Administrative Agent shall, if such Assignment and Acceptance has been
completed and is in the form of Exhibit C, (i) accept such Assignment and
Acceptance, (ii) record the information contained therein in the Register,
(iii) give prompt notice thereof to the Lenders and the Borrowers, and (vi)
promptly deliver a copy of such Acceptance and Assignment to the Borrowers.
As of the date specified by the Administrative Agent, but in any event
within five Business Days after receipt of notice, the Borrowers shall
execute and deliver to the Administrative Agent in exchange for the
surrendered Note, a new Note to the order of such Eligible Assignee in an
amount equal to the Commitment assumed by such Eligible Assignee pursuant
to such Assignment and Acceptance and a new Note to the order of the
assigning Lender in an amount equal to the Commitment retained by it
hereunder.  Such new Note shall be in an aggregate principal amount equal
to the aggregate principal amount of such surrendered Note, shall be
dated the effective date of such Assignment and Acceptance and shall
otherwise be in substantially the form of the assigned Note.  Each
surrendered Note shall be canceled and returned to the Borrowers.

     (f)  Each Lender may sell participations to one or more banks or
other entities in all or a portion of its rights and obligations under
this Agreement (including, without limitation, all or a portion of its
Commitment hereunder and the Loans owing to it and the Notes held by
it); provided, however, that (i) each such participation (other than to
a Lender's own Affiliate) shall be in an amount not less than the
Minimum Commitment, (ii) such Lender's obligations under this Agreement
(including, without limitation, its Commitment hereunder) shall remain
unchanged, (iii) such Lender shall remain solely responsible to the other
parties hereto for the performance of such obligations, (iv) such Lender
shall remain the holder of the Notes held by it for all purposes of this
Agreement, (v) the Borrowers, the Administrative 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;
provided, that such Lender may agree with any participant that such
Lender will not, without such participant's consent, agree to or approve
any waivers or amendments which would reduce the principal of or the
interest rate on any Loans, extend the term or increase the amount of the
commitments of such participant, reduce the amount of any fees to which
such participant is entitled, extend any scheduled payment date for
principal or release all or substantially all of the Collateral securing
the Loans, and (vi) any such disposition shall not, without the consent
of the Borrowers, require any Borrower to file a registration statement
with the Securities and Exchange Commission or apply to qualify the Loans
or the Notes under the blue sky law of any state.  The Lender selling a
participation to any bank or other entity that is not an Affiliate of
such Lender shall give prompt notice thereof to the Administrative Agent,
the other Lenders and the Borrowers.

     (g)  Any Lender may, in connection with any assignment, proposed
assignment, participation or proposed participation pursuant to this
Section 13.1, disclose to the assignee, participant, proposed assignee or
proposed participant, any information relating to the Borrowers furnished
to such Lender by or on behalf of the Borrowers, provided that, prior to
any such disclosure, each such assignee, proposed assignee, participant
or proposed participant shall agree with the Borrowers or such Lender
(in the case of an agreement with only such Lender, the Borrowers shall
be recognized as third party beneficiaries thereof) to preserve the
confidentiality of any confidential information relating to the Borrowers
received from such Lender.

     Section 13.2  Representation of Lenders.  Each Lender hereby
represents that it will make each Loan hereunder as a commercial loan for
its own account in the ordinary course of its business; provided, however,
that, subject to Section 13.1 hereof, the disposition of the Notes or
other evidence of the Secured Obligations held by any Lender shall at all
times be within its exclusive control.

                               ARTICLE 14

                                  AGENT

     Section 14.1  Appointment of Administrative Agent.  Each Lender
hereby irrevocably designates and appoints FCC as the Administrative Agent
of such Lender under this Agreement and the other Loan Documents.  Each
Lender irrevocably authorizes the Administrative Agent, as the
Administrative Agent for such Lender, to take such action on its behalf
under the provisions of this Agreement and the other Loan Documents and
to exercise such powers and perform such duties as are expressly
delegated to the Administrative Agent by the terms of this Agreement and
such other Loan Documents, together with such other powers as are
reasonably incidental thereto.  Notwithstanding any provision to the
contrary elsewhere in this Agreement or the other Loan Documents, the
Administrative Agent shall not have any duties or responsibilities except
those expressly set forth herein and therein, or any fiduciary
relationship with any Lender, and no implied covenants, functions,
responsibilities, duties, obligations or liabilities shall be read into
this Agreement or the other Loan Documents or otherwise exist against
the Administrative Agent.

     Section 14.2  Delegation of Duties.  The Administrative Agent may
execute any of its duties under this Agreement and the other Loan
Documents by or through agents or attorneys-in-fact and shall be entitled
to advice of counsel concerning all matters pertaining to such duties.
The Administrative Agent shall not be responsible for the negligence or
misconduct of any agents or attorneys-in-fact selected by it with
reasonable care.  The Administrative Agent hereby appoints, authorizes
and directs each Lender to act as collateral sub-agent for the
Administrative Agent for the purposes of perfecting security interests
and Liens in Collateral held by such Lender.

     Section 14.3  Exculpatory Provisions.  Neither the Administrative
Agent nor any of its trustees, officers, directors, employees, agents,
attorneys-in-fact or Affiliates shall be (i) liable to any Lender
(or any Lender's participants) for any action lawfully taken or omitted
to be taken by it or such Person under or in connection with this
Agreement or the other Loan Documents (except for its or such Person's,
as the case may be, own gross negligence or willful misconduct), or (ii)
responsible in any manner to any Lender (or any Lender's participants)
for any recitals, statements, representations or warranties made by the
Borrowers or any of the Subsidiaries, any Affiliate thereof or any other
Person or any officer thereof contained in this Agreement or the other
Loan Documents or in any certificate, report, statement or other document
referred to or provided for in, or received by the Administrative Agent
under or in connection with, this Agreement or the other Loan Documents
or for the existence, value, validity, effectiveness, genuineness,
enforceability or sufficiency of this Agreement or the other Loan
Documents or any Collateral or the Security Interest or other Lien or
other interest therein or for any failure of the Borrowers, or any
Subsidiary or any Affiliate of the Borrowers to perform its obligations
hereunder or thereunder.  The Administrative Agent shall not be under
any obligation to any Lender to ascertain or to inquire as to the
observance or performance of any of the agreements contained in, or
conditions of, this Agreement, or to inspect the properties, books or
records of the Borrowers or the other Loan Parties, provided, that if the
Administrative Agent does not perform or cause to be performed at least
two field examinations of the Loan Parties in any Fiscal Year or cause at
least one appraisal report with respect to the Loan Parties' Eligible
Fixed Assets to be ordered from a qualified independent appraiser in each
year, the Required Lenders may designate a qualified Person to conduct
such field examination or such appraisal and the Required Lenders and
such Person shall be entitled to reimbursement or payment for the costs
and expenses of such examination or such appraisal to the extent provided
for the Administrative Agent in Section 15.2.

     Section 14.4  Reliance by Administrative Agent.  The Administrative
Agent shall be entitled to rely, and shall be fully protected in relying,
upon any Note, writing, resolution, notice, consent, certificate,
affidavit, letter, cablegram, telegram, telecopy, telex or teletype
message, statement, order or other document or conversation believed by
it to be genuine and correct and to have been signed, sent or made by the
proper Person or Persons and upon advice and statements of legal counsel
(including, without limitation, counsel to the Borrowers), independent
accountants and other experts selected by the Administrative Agent.  The
Administrative Agent may deem and treat the payee of any Note as the owner
thereof for all purposes unless such Note shall have been transferred in
accordance with Section 13.1.  The Administrative Agent shall be fully
justified in failing or refusing to take any action under this Agreement
and the other Loan Documents unless it shall first receive such advice or
concurrence of the Required Lenders as it deems appropriate and shall be
indemnified to its satisfaction by the Lenders against any and all
liability and expense which may be incurred by it by reason of
taking or continuing to take any such action.  The Administrative Agent
shall in all cases be fully protected in acting, or in refraining from
acting, under this Agreement and the Notes in accordance with a request
of the Required Lenders (or all Lenders if such action or inaction would
have the effect of amending or waiving a breach of any provision of this
Agreement that only all the Lenders may amend or waive in accordance with
the provisions of Section 15.9(b)), and such request and any action taken
or failure to act pursuant thereto shall be binding upon all the Lenders
and all future holders of the Notes.

     Section 14.5  Notice of Default.  The Administrative Agent shall not
be deemed to have knowledge or notice of the occurrence of any Default or
Event of Default hereunder unless the Administrative Agent has received
notice from a Lender or the Borrowers referring to this Agreement,
describing such Default or Event of Default and stating that such notice
is a "notice of default".  In the event that the Administrative Agent
receives such a notice, the Administrative Agent shall promptly give
notice thereof to the Lenders.  The Administrative Agent shall take such
action with respect to such Default or Event of Default as shall be
directed by the Required Lenders; provided that unless and until the
Administrative Agent shall have received such directions, the
Administrative Agent may (but shall not be obligated to) continue making
Loans to the Borrowers on behalf of the Lenders in reliance on the
provisions of Section 4.7 and take such other action, or refrain from
taking such action, with respect to such Default or Event of Default as
it shall deem advisable and in the best interests of the Lenders.

     Section 14.6  Non-Reliance on Administrative Agent and Other Lenders.
Each Lender expressly acknowledges that neither the Administrative Agent
nor its officers, directors, counsel, employees, agents, attorneys-in-fact
or Affiliates has made any representations or warranties to it and that
no act by the Administrative Agent hereafter taken, including any review
of the affairs of the Borrowers, any Subsidiary or any Affiliate of the
Borrowers, shall be deemed to constitute any representation or warranty
by the Administrative Agent to any Lender.  Each Lender represents to the
Administrative Agent that it has, independently and without reliance upon
the Administrative Agent or any other Lender, and based on such documents
and information as it has deemed appropriate, made its own appraisal of
and investigation into the business, operations, property, financial
(and other) condition and creditworthiness of the Borrowers and the
Subsidiaries, and made its own decision to make its Loans hereunder and
enter into this Agreement.  Each Lender also represents that it will,
independently and without reliance upon the Administrative Agent or any
Co-Agent or any other Lender, and based on such documents and information
as it shall deem appropriate at the time, continue to make its own credit
analysis, appraisals and decisions in taking or not taking action under
this Agreement and the other Loan Documents, and to make such
investigation as it deems necessary to inform itself as to the business,
operations, property, financial (and other) condition and creditworthiness
of the Borrowers and the Subsidiaries.  Except for notices, reports and
other documents expressly required to be furnished to the Lenders by the
Administrative Agent hereunder or under the other Loan Documents, the
Administrative Agent shall have no duty or responsibility to provide any
Lender with any credit or other information concerning the business,
operations, property, financial (and other) condition or creditworthiness
of the Borrowers or the Subsidiaries or the Affiliates of the Borrowers
which may come into the possession of the Administrative Agent or any of
its officers, directors, employees, agents, attorneys-in-fact or
Affiliates.

     Section 14.7  Indemnification.

     (a)  The Lenders agree to indemnify the Administrative Agent in
its capacity as such (to the extent not reimbursed by the Borrowers
and without limiting the obligation of the Borrowers or any other
Person to do so), Ratably, from and against any and all liabilities,
obligations, losses, damages, penalties, actions, judgments, suits,
attorneys' fees, costs, expenses or disbursements of any kind whatsoever
which may at any time (including, without limitation, at any time
following the payment of the Notes) be imposed on, incurred by or asserted
against the Administrative Agent in any way relating to or arising out of
this Agreement or the other Loan Documents, or any documents contemplated
by or referred to herein or therein or the transactions contemplated
hereby or thereby or any action taken or omitted by the Administrative
Agent under or in connection with any of the foregoing; provided that no
Lender shall be liable for the payment of any portion of such liabilities,
obligations, losses, damages, penalties, actions, judgments, suits,
attorneys' fees, costs, expenses or disbursements resulting from the
Administrative Agent's gross negligence or willful misconduct or resulting
solely from transactions or occurrences that occur at a time after such
Lender has assigned all of its interests, rights and obligations under
this Agreement pursuant to Section 13.1 or, in the case of a Lender to
which an assignment is made hereunder pursuant to Section 13.1, at a time
before such assignment.  The agreements in this Section 14.7 shall survive
the payment of the Notes, the Secured Obligations and all other amounts
payable hereunder and the termination of this Agreement.

     (b)  Without limiting the generality of the foregoing provisions of
this Section 14.7, if the Administrative Agent should be sued by any
receiver, trustee in bankruptcy, debtor-in-possession or other Person
on account of any alleged preference or fraudulent transfer received or
alleged to have been received from the Borrowers, any Subsidiary or any
other Person as the result of any transaction under the Loan Documents,
then any monies paid by the Administrative Agent in settlement or
satisfaction of such suit, together with all costs and expenses
(including attorneys' fees and expenses) incurred by Administrative
Agent in the defense of same, shall be promptly reimbursed to the
Administrative Agent by the Lenders to the extent of each Lender's
Ratable Share.

     (c)  Further, without limiting the generality of the foregoing
provisions of this Section 14.7, if at any time (whether prior to or
after the Termination Date) any action or proceeding shall be brought
against the Administrative Agent by the Borrowers, any Subsidiary,
or by any other Person claiming by, through or under the Borrowers or
any Subsidiary, to recover damages for any action taken or omitted by
the Administrative Agent under any of the Loan Documents or in the
performance of any rights, powers or remedies of the Administrative
Agent against the Borrowers, any Account Debtor, any Subsidiary, the
Collateral or with respect to any Loans, or to obtain any other relief
of any kind on account of any transaction between the Administrative
Agent and the Borrowers, any Subsidiary or any other Person under or in
relation to any of the Loan Documents, the Lenders agree to indemnify
and hold the Administrative Agent harmless with respect thereto and to
pay to Administrative Agent their respective Ratable Shares of such
amount as the Administrative Agent shall be required to pay by reason of
a judgment, decree or other order entered in such action or proceeding
or by reason of any compromise or settlement agreed to by the
Administrative Agent, including all interest and costs assessed against
the Administrative Agent in defending or compromising such action,
together with attorneys' fees and other legal expenses paid or incurred
by the Administrative Agent in connection therewith; provided, however,
that no Lender shall be liable to the Administrative Agent for any of
the foregoing to the extent that they arise from the willful misconduct
or gross negligence of the Administrative Agent.  In the Administrative
Agent's discretion, the Administrative Agent may also reserve for or
satisfy any such judgment, decree or order from proceeds of Collateral
prior to any distributions therefrom to or for the account of Lenders.

     Section 14.8  Administrative Agent in Its Individual Capacity.
The institution at the time acting as the Administrative Agent and its
Affiliates may make loans to, issue or cause to be issued letters of
credit to or for the account of, accept deposits from and generally
engage in any kind of business with the Borrowers, any Subsidiary or any
Affiliate of the Borrowers as if it were not the Administrative Agent
hereunder.  With respect to its Commitment, the Loans made or renewed by
it and any Note issued to it and any Letter of Credit or Letter of Credit
Guarantee issued by it, such institution shall have and may exercise the
same rights and powers under this Agreement and the other Loan Documents
and shall be subject to the same obligations and liabilities as and to
the extent set forth herein and in the other Loan Documents for any other
Lender.  The terms "Lenders" and "Required Lenders" or any other term
shall, unless the context clearly otherwise indicates, include such
institution in its individual capacity as a Lender or one of the Required
Lenders.

     Section 14.9  Successor Administrative Agent.

     (a)  The Administrative Agent may resign as Administrative Agent
upon 30 days' notice to the Lenders and the Borrowers or at any time when
there are more than two other Lenders, may be removed by the Required
Lenders; provided, however that such resignation shall not take effect
until a successor agent has been appointed.  If the Administrative Agent
shall resign as Administrative Agent under this Agreement or be removed,
then the Required Lenders shall appoint from among the Lenders a successor
agent for the Lenders, subject, so long as no Default or Event of Default
exists, to the consent of MasTec, which consent shall not be unreasonably
withheld or delayed, whereupon such successor agent shall succeed to the
rights, powers and duties of the Administrative Agent, and the term
"Administrative Agent" shall mean such successor agent effective upon
its appointment, and the former Administrative Agent's rights, powers and
duties as Administrative Agent shall be terminated, without any other or
further act or deed on the part of such former Administrative Agent or any
of the parties to this Agreement or any holders of the Notes.  If the
Required Lenders have failed to appoint a successor Administrative Agent
within 30 days after the resignation notice given by the Administrative
Agent as provided above, then the Administrative Agent shall be entitled
to appoint a successor agent from among the Lenders.  After any retiring
Administrative Agent's resignation hereunder as Administrative Agent or
the removal of any Administrative Agent, the provisions of Section 14.7
shall inure to its benefit as to any actions taken or omitted to be taken
by it while it was Administrative Agent under this Agreement.

     (b)  It is intended that there shall be no violation of any
Applicable Law denying or restricting the right of financial institutions
to transact business as agent in any jurisdiction.  It is recognized that,
in case of litigation under any of the Loan Documents, or in case the
Administrative Agent deems that by reason of present or future laws of any
jurisdiction the Administrative Agent might be prohibited from or
restricted in exercising any of the powers, rights or remedies granted to
the Administrative Agent or the Lenders hereunder or under any of the Loan
Documents or from holding title to or a Lien upon any Collateral or from
taking any other action which may be necessary or desirable hereunder or
under any of the Loan Documents, the Administrative Agent may appoint an
additional individual or institution as a separate collateral agent or
co-collateral agent which is not so prohibited from or restricted in
taking any of such actions or exercising any of such powers, rights or
remedies.  If the Administrative Agent shall appoint an additional
individual or institution as a separate collateral agent or co-collateral
agent as provided above, each and every remedy, power, right, claim,
demand or cause of action intended by any of the Loan Documents to be
exercised by or vested in or conveyed to the Administrative Agent with
respect thereto shall be exercisable by and vested in such separate
collateral agent or co-collateral agent, but only to the extent
necessary to enable such separate collateral agent or co-collateral agent
to exercise such powers, rights and remedies, and every covenant and
obligation necessary to the exercise thereof by such separate collateral
agent or co-collateral agent shall run to and be enforceable by either
of them.  Should any instrument from the Lenders be required by the
separate collateral agent or co-collateral agent so appointed by
Administrative Agent in order more fully and certainly to vest in and
confirm to him or it such rights, powers, duties and obligations,
including without limitation indemnification of such collateral agent
or co-collateral agent, any and all of such instruments shall, on
request, be executed, acknowledged and delivered by the Lenders.
In case any separate collateral agent or co-collateral agent, or a
successor to either, shall die, become incapable of acting, resign or
be removed, all the estates, properties, rights, powers, duties and
obligations of such separate collateral agent or co-collateral agent,
so far as permitted by Applicable Law, shall vest in and be exercised
by the Administrative Agent until the appointment of a new collateral
agent or successor to such separate collateral agent or co-collateral
agent.

     Section 14.10  Notices from Administrative Agent to Lenders.  The
Administrative Agent shall promptly upon receipt thereof, forward to each
Lender copies of any updated Schedules and of any written notices,
reports or other information supplied to it by the Borrowers or any
Subsidiary (but which such Person is not required to supply directly to
the Lenders).  Except to the extent expressly provided in this Agreement
or in the other Loan Documents, the Administrative Agent shall not be
obligated to deliver or disclose to any Lender any of the
Administrative Agent's internal reports, analysis or investigation or
any records or other information in its possession relating to the
Borrowers or any of the Subsidiaries or the Affiliates of the Borrowers.

     Section 14.11  Declaring Events of Default.  Upon the occurrence of
a Default, the Administrative Agent may, and at the direction of the
Required Lenders shall, give such notice or take such other action
as may be required hereunder to declare an Event of Default.

     Section 14.12  Other Agents.  For avoidance of doubt, it is expressly
acknowledged and agreed by the Administrative Agent and each Lender for
the benefit of any Documentation Agent, Syndication Agent, or any other
agent party hereto at any time, that other than any rights or obligations
explicitly reserved to or imposed upon any such agent under this Agreement,
each such agent, in such capacity, shall have no rights or obligations
hereunder nor shall any such agent, in such capacity, be responsible or
accountable to any other party hereto for any action or failure to act
hereunder, other than in connection with such explicitly reserved rights
or such obligations and then only for claims, damages, losses (other than
consequential losses, for which it shall not in any circumstances be
liable) and other liabilities arising out of such Person's own gross
negligence or willful misconduct.

                                 ARTICLE 15

                               MISCELLANEOUS

     Section 15.1  Notices.

     (a)  Method of Communication.  Except as specifically provided in
this Agreement or in any of the Loan Documents, all notices and the
communications hereunder and thereunder shall be in writing or by
telephone subsequently confirmed in writing.  Notices in writing shall
be delivered personally or sent by U.S. first class mail, certified or
registered, postage pre-paid, return receipt requested, or by reputable
overnight courier or facsimile transmission and shall be deemed received
in the case of personal delivery, when delivered, in the case of mailing,
when receipted for, in the case of overnight delivery, on the next
Business Day after delivery to the courier, and in the case of telex and
facsimile transmission, upon transmittal, provided that in the case of
notices to the Administrative Agent pursuant to Article 2 and 3, notice
shall be deemed to have been given only when such notice is actually
received by the Administrative Agent.  The Administrative Agent may agree
to accept, but is not obligated so to agree, notice by electronic mail.
A telephonic notice to the Administrative Agent, as understood by the
Administrative Agent, will be deemed to be the controlling and proper
notice in the event of a discrepancy with or failure to receive a
confirming written notice.

     (b)  Addresses for Notices.  Notices to any party shall be sent
to it at the following addresses, or any other address of which all the
other parties are notified in writing by such first party:

          If to the Borrowers:           MasTec, Inc.
                                         3155 N.W. 77th Avenue
                                         Miami, Florida 33122
                                         Attn:  Legal Department
                                         Facsimile No.:  305/406-1907

          with a copy to:                MasTec, Inc.
                                         3155 N.W. 77th Avenue
                                         Miami, Florida 33122
                                         Attn:  Finance Department
                                         Facsimile No.:  305/406-1908

          If to the
          Administrative Agent:          Fleet Capital Corporation
                                         300 Galleria Parkway
                                         Suite 800
                                         Atlanta, Georgia 30339
                                         Attn: Loan Administration Manager
                                         Facsimile No.: (770) 859-2483
          If to a Lender:                At the address of such Lender set
                                         forth on the signature pages
                                         hereof.

     (c)  Administrative Agent's Office.  The Administrative Agent hereby
designates its office located at 300 Galleria Parkway, Suite 800, Atlanta,
Georgia 30339, or any subsequent office which shall have been specified
for such purpose by written notice to the Borrowers, as the office to
which payments due are to be made.

     Section 15.2  Expenses.  The Borrowers agree, jointly and severally,
to pay or reimburse on demand all costs and expenses reasonably (other
than pursuant to subsection (c) below as to which such requirement shall
not apply) incurred

     (a)  by or on behalf of the Administrative Agent, including, without
limitation, the reasonable fees and disbursements of counsel, in
connection with

         (i)   the negotiation, preparation, execution, delivery,
administration, enforcement and termination of this Agreement and each
of the other Loan Documents, whenever the same shall be executed and
delivered, including, without limitation

              (A)  reasonable out-of-pocket costs and expenses incurred
in connection with the administration and interpretation of this
Agreement and the other Loan Documents;

              (B)  reasonable costs and expenses of one "desktop"
appraisal of the Equipment per year or if (1) Availability is less than
$20,000,000 and aggregate Commitments are not greater than
$100,000,000 or (2) Availability is less than $25,000,000 and aggregate
Commitments are greater than $100,000,000 but less than $125,000,000 or
(3) Availability is less than $30,000,000 and aggregate Commitments are
at least $125,000,000, up to two "desktop" appraisals of the Equipment
per year, provided that if an Event of Default has occurred and is
continuing, the Borrowers shall be obligated to pay for or to reimburse
the Administrative Agent for all costs of any reasonable number of such
appraisals of the Equipment and for costs attributable to expanding the
scope or methodology of any such appraisal beyond that employed in
preparing the appraisal report(s) delivered and accepted pursuant to
Section 5.1(a)(14);

              (C)  the costs and expenses of lien searches; and

              (D)  taxes, fees and other charges for filing the Financing
Statements and continuations and the costs and expenses of taking other
actions to perfect, protect, and continue the Security Interests;

         (ii)   the preparation, execution and delivery of any waiver,
amendment, supplement or consent by the Administrative Agent and the
Lenders relating to this Agreement or any of the Loan Documents;

         (iii)	sums paid or incurred to pay any amount or take any action
required of the Borrowers under the Loan Documents that the Borrowers fail
to pay or take;

         (iv)	costs of inspections and verifications of the Collateral,
including, without limitation, standard per diem fees charged by the
Administrative Agent or the Lenders, travel (coach class or equivalent),
lodging, and meals for inspections of the Collateral and the Borrowers'
operations and books and records by the Administrative Agent's agents
(or the agents of any Person appointed by the Required Lenders pursuant
to Section 14.3) up to two times per year and also whenever (A) an Event
of Default exists or (B)(1) Availability is less than $20,000,000 and
aggregate Commitments are not greater than $100,000,000 or (2)
Availability is less than $25,000,000 and aggregate Commitments are
greater than $100,000,000 but less than $125,000,000 or (3) Availability
is less than $30,000,000 and aggregate Commitments are at least
$125,000,000;

         (v)    costs and expenses of forwarding loan proceeds, collecting
checks and other items of payment, and establishing and maintaining each
Disbursement Account, Controlled Account and Lockbox; and

         (vi)   costs and expenses of preserving and protecting the
Collateral;

     (b)  by or on behalf of the Arranger in connection with the initial
syndication of the Revolving Credit Facility and any subsequent
syndication in connection with a Commitment Increase; and

     (c)  by or on behalf of the Administrative Agent or any Lender in
connection with

         (i)   consulting, after the occurrence of a Default, with one or
more Persons, including appraisers, accountants and lawyers, concerning
the value of any Collateral for the Secured Obligations or related to the
nature, scope or value of any right or remedy of the Administrative Agent
or any Lender hereunder or under any of the Loan Documents, including any
review of factual matters in connection therewith, which expenses shall
include the fees and disbursements of such Persons; and

         (ii)   costs and expenses paid or incurred to obtain payment of
the Secured Obligations, enforce the Security Interests, sell or otherwise
realize upon the Collateral, and otherwise enforce the provisions of the
Loan Documents, or to prosecute or defend any claim in any way arising
out of, related to or connected with, this Agreement or any of the Loan
Documents, which expenses shall include the reasonable fees and
disbursements of counsel and of experts and other consultants retained by
the Administrative Agent or any Lender.

The foregoing shall not be construed to limit any other provisions of the
Loan Documents regarding costs and expenses to be paid by the Borrowers.
The Borrowers hereby authorize the Administrative Agent and the Lenders
to debit the Borrowers' Loan Accounts (by increasing the principal amount
of the Loans) in the amount of any such costs and expenses owed by the
Borrowers when due.

     Section 15.3  Stamp and Other Taxes.  The Borrowers will pay any and
all stamp, registration, recordation and similar taxes, fees or charges
and shall indemnify the Administrative Agent and the Lenders against any
and all liabilities with respect to or resulting from any delay in the
payment or omission to pay any such taxes, fees or charges, which may be
payable or determined to be payable in connection with the execution,
delivery, performance or enforcement of this Agreement and any of the
Loan Documents or the perfection of any rights or security interest
thereunder, including, without limitation, the Security Interest.

     Section 15.4  Setoff.  In addition to any rights now or hereafter
granted under Applicable Law and not by way of limitation of any such
rights, during the continuance of any Event of Default, each Lender,
any participant with such Lender in the Loans and each Affiliate of each
Lender are hereby authorized by the Borrowers at any time or from time to
time, without notice to the Borrowers or to any other Person, any such
notice being hereby expressly waived, to set off and to appropriate and
to apply any and all deposits (general or special, including, but not
limited to, indebtedness evidenced by certificates of deposit, whether
matured or unmatured) and any other indebtedness at any time held or
owing by any Lender or any Affiliate of any Lender or any participant to
or for the credit or the account of the Borrowers against and on account
of the Secured Obligations irrespective or whether or not

     (a)  the Administrative Agent or such Lender shall have made any
demand under this Agreement or any of the Loan Documents, or

     (b)  the Administrative Agent or such Lender shall have declared
any or all of the Secured Obligations to be due and payable as permitted
by Section 12.2 and although such Secured Obligations shall be
contingent or unmatured.

     Section 15.5  Consent to Advertising and Publicity.  With the prior
written consent of the Borrowers, which consent may be withheld in their
sole discretion, the Administrative Agent, on behalf of the Lenders, may
issue and disseminate to the public information describing the credit
accommodation entered into pursuant to this Agreement, including the name
and address of the Borrowers, the amount, interest rate, maturity,
collateral for and a general description of the credit facilities provided
hereunder and of the Borrowers' business.

     Section 15.6  Reversal of Payments.  The Administrative Agent and
each Lender shall have the continuing and exclusive right to apply,
reverse and re-apply any and all payments to any portion of the Secured
Obligations in a manner consistent with the terms of this Agreement.  To
the extent the Borrowers make a payment or payments to the Administrative
Agent, for the account of the Lenders, or any Lender receives any payment
or proceeds of the Collateral for the Borrowers' benefit, which payment(s)
or proceeds or any part thereof are subsequently invalidated, declared to
be fraudulent or preferential, set aside and/or required to be repaid to a
trustee, receiver or any other party under any bankruptcy law, state or
federal law, common law or equitable cause, then, to the extent of such
payment or proceeds received, the Secured Obligations or part thereof
intended to be satisfied shall be revived and continued in full force and
effect, as if such payment or proceeds had not been received by the
Administrative Agent or such Lender.

     Section 15.7  Injunctive Relief.  The Borrowers recognize that, in
the event the Borrowers fail to perform, observe or discharge any of
their obligations or liabilities under this Agreement, any remedy at law
may prove to be inadequate relief to the Administrative Agent and the
Lenders; therefore, the Borrowers agree that if any Event of Default
shall have occurred and be continuing, the Administrative Agent and the
Lenders, if the Administrative Agent or any Lender so requests, shall be
entitled to temporary and permanent injunctive relief without the
necessity of proving actual damages.

     Section 15.8  Accounting Matters.  All financial and accounting
calculations, measurements and computations made for any purpose relating
to this Agreement, including, without limitation, all computations
utilized by the Borrowers to determine whether they are in compliance with
any covenant contained herein, shall, unless this Agreement otherwise
provides or unless Required Lenders shall otherwise consent in writing,
be performed in accordance with GAAP.

     Section 15.9  Amendments.

     (a)   Except as set forth in subsection (b) below and subject to the
provisions of Section 15.24, any term, covenant, agreement or condition of
this Agreement or any of the other Loan Documents may be amended or
waived, and any departure therefrom may be consented to by the Required
Lenders, if, but only if, such amendment, waiver or consent is in writing
signed by the Required Lenders and, in the case of an amendment (other
than an amendment described in Section 15.9(d)), by the Borrowers,
provided that no such amendment, unless consented to by the Administrative
Agent, shall alter or affect the rights or responsibilities of the
Administrative Agent, and in any such event, the failure to observe,
perform or discharge any such term, covenant, agreement or condition
(whether such amendment is executed or such waiver or consent is given
before or after such failure) shall not be construed as a breach of
such term, covenant, agreement or condition or as a Default or an Event
of Default.  Unless otherwise specified in such waiver or consent, a
waiver or consent given hereunder shall be effective only in the
specific instance and for the specific purpose for which given.  The
Administrative Agent and the Lenders may require and charge a fee in
connection with any amendment or waiver and in consideration thereof in
such amount as shall be determined by the Administrative Agent and
the Required Lenders in their discretion.

     (b)  Without the prior unanimous written consent of the Lenders, no
amendment, consent or waiver shall (A) increase the amount or extend the
time of any Lender's obligation to make Loans or (B) extend the
originally scheduled time or times of repayment of the principal of any
Loan or (C) alter (other than to accelerate or make more frequent) the
time or times of payment of interest on any Loan or of any fees payable
for the account of the Lenders or (D) decrease the amount of the
principal of any Loan or the rate of interest thereon or (E) decrease
the amount of any commitment fee or other fee payable hereunder for the
account of the Lenders' or (F) permit any subordination of the principal
of or interest on any Loan or (G) permit any amendment to Section 4.18.
Without the prior unanimous written consent of the Lenders, no Borrower
or material Guarantor shall be released from its liability for the
Secured Obligations nor shall Collateral be released in excess of the
amount thereof disposed of in any Fiscal Year in compliance with Section
8.7(a).  Except to the extent expressly provided in Sections 4.7 and
14.1, without the prior unanimous written consent of the Lenders, no
amendment shall be made to the following definitions:  "Borrowing Base"
or the defined terms used therein, "Eligible Assignee", "Ratable",
"Ratable Share", "Commitment Percentage", "Secured Obligations" (other
than to include additional obligations of the Loan Parties owing to all
Lenders), "Lenders" or "Required Lenders", or to the provisions of this
Section 15.9 or the provisions of Article 12.  Neither the
Administrative Agent nor any Lender shall consent to any amendment to or
waiver of the amortization, deferral or subordination provisions of any
instrument or agreement evidencing or relating to obligations (whether
or not Debt) of the Borrowers that are expressly subordinate to any of
the Secured Obligations if such amendment or waiver would be adverse to
the Lenders in their capacities as Lenders hereunder, without the prior
written consent of each Lender affected thereby.  Notwithstanding
anything herein to the contrary, the Required Lenders shall have the
right to waive any Default or Event of Default and the consequences
hereunder of such Default or Event of Default provided only that such
Default or Event of Default does not arise under Section 12.1(g) or
(h) or out of a breach of or failure to perform or observe any term,
covenant or condition of this Agreement or any other Loan Document
(other than the provisions of Article 12 of this Agreement) the amendment
of which requires the unanimous consent of the Lenders.  The Required
Lenders shall have the right, with respect to any Default or Event of
Default that may be waived by them, to enter into an agreement with the
Borrowers providing for the forbearance from the exercise of any
remedies provided hereunder or under the other Loan Documents without
thereby waiving any such Default or Event of Default.

     (c)  The making of Loans hereunder by the Lenders during the
existence of a Default or Event of Default shall not be deemed to
constitute a waiver of such Default or Event of Default.

     (d)  Notwithstanding any provision of this Agreement or the other
Loan Documents to the contrary, no consent, written or otherwise, of
the Borrowers shall be necessary or required in connection with any
amendment to Section 4.8 or Article 14, and any amendment to such
provisions may be effected solely by and among the Administrative Agent
and the Lenders, provided that no such amendment shall impose any
obligation on the Borrowers or limit or reduce any right granted
hereunder or thereunder to the Borrowers.

     Section 15.10  Confidentiality.  Neither the Administrative Agent
nor any Lender shall, except with the prior written consent of MasTec,
disclose any Confidential Information to any Person, other than (a) to
the Administrative Agent's or such Lender's Affiliates and their
officers, directors, employees, agents and advisors that are involved
in the administration or monitoring of this Agreement and the credit
facilities extended hereunder, (b) to actual or prospective Eligible
Assignees and participants, and then only on a confidential basis,
(c) as required by any law, rule or regulation or judicial process,
(d) as requested or required by any state, federal or foreign authority
or examiner regulating such Lender and (e) to any rating agency when
required by it, provided that, prior to any such disclosure the
Administrative Agent shall make all reasonable efforts to notify MasTec
and such rating agency shall undertake to preserve the confidentiality
of any Confidential Information relating to MasTec and its Subsidiaries
received by it from the Administrative Agent or any Lender.  For
purposes of this Section 15.10, "Confidential Information" means
information that any Loan Party furnishes to the Administrative Agent
or any Lender in a writing designated as "confidential," but does not
include any such information that is or becomes generally available to
the public other than as a result of a breach by the Administrative Agent
or such Lender of its obligations hereunder or that is or becomes
available to the Administrative Agent or such Lender from a source other
than the Loan Parties that is not, to the best of the Administrative
Agent's or such Lender's knowledge, acting in violation of a
confidentiality agreement with a Loan Party.

     Section 15.11  Performance of Borrowers' Duties.

     (a)  The Borrowers' obligations under this Agreement and each of
the Loan Documents shall be performed by the Borrowers at their sole
cost and expense.

     (b)  If the Borrowers shall fail to do any act or thing which they
have covenanted to do under this Agreement or any of the Loan Documents,
the Administrative Agent, on behalf of the Lenders, may (but shall not
be obligated to) do the same or cause it to be done either in the name
of the Administrative Agent or the Lenders or in the name and on behalf
of the Borrowers, and each Borrower hereby irrevocably authorizes the
Administrative Agent so to act.

     Section 15.12  Indemnification.  The Borrowers agree to reimburse
the Administrative Agent and the Lenders for all costs and expenses,
including reasonable counsel fees and disbursements, incurred, and to
indemnify and hold harmless the Administrative Agent and the Lenders
from and against all losses suffered by, the Administrative Agent or
any Lender in connection with

     (a)  the exercise by the Administrative Agent or any Lender of any
right or remedy granted to it under this Agreement or any of the Loan
Documents,

     (b)  any claim, and the prosecution or defense thereof, arising out
of or in any way connected with this Agreement or any of the Loan
Documents, and

     (c)  the collection or enforcement of the Secured Obligations or
any of them,other than such costs, expenses and liabilities arising
out of the Administrative Agent's or any Lender's gross negligence
or willful misconduct.

     Section 15.13  All Powers Coupled with Interest.  All powers of
attorney and other authorizations granted to the Administrative Agent
and the Lenders and any Persons designated by the Administrative Agent
or the Lenders pursuant to any provisions of this Agreement or any of
the Loan Documents shall be deemed coupled with an interest and shall be
irrevocable so long as any of the Secured Obligations remain unpaid or
unsatisfied.

     Section 15.14  Survival.  Notwithstanding any termination of this
Agreement,
     (a)  until all Secured Obligations have been irrevocably paid
in full or otherwise satisfied, the Administrative Agent, for the
benefit of the Lenders, shall retain its Security Interest and shall
retain all rights under this Agreement and each of the Security
Documents with respect to such Collateral as fully as though this
Agreement had not been terminated,

     (b)  the indemnities to which the Administrative Agent and the
Lenders are entitled under the provisions of this Article 15 and any
other provision of this Agreement and the Loan Documents shall
continue in full force and effect and shall protect the Administrative
Agent and the Lenders against events arising after such termination as
well as before, and

     (c)  in connection with the termination of this Agreement and the
release and termination of the Security Interests, the Administrative
Agent shall execute and deliver or authorize the filing of such
termination statements and other instruments as may be necessary to
continue the release of the Security Interest and that the Borrowers
reasonably request, provided that the Administrative Agent, on behalf of
itself as agent and the Lenders, may require such assurances and
indemnities as it shall reasonably deem necessary or appropriate to
protect the Administrative Agent and the Lenders against loss on account
of such release and termination, including, without limitation, with
respect to credits previously applied to the Secured Obligations that
may subsequently be reversed or revoked.

     Section 15.15  Titles and Captions.  Titles and captions of
Articles, Sections and subsections in this Agreement are for convenience
only, and neither limit nor amplify the provisions of this Agreement.

     Section 15.16  Severability of Provisions.  Any provision of this
Agreement or any Loan Document which is prohibited or unenforceable in
any jurisdiction shall, as to such jurisdiction, be ineffective only to
the extent of such prohibition or unenforceability without invalidating
the remainder of such provision or the remaining provisions hereof or
thereof or affecting the validity or enforceability of such provision
in any other jurisdiction.

     Section 15.17	Governing Law; Waiver of Jury Trial.

     (a)  This Agreement and the Notes shall be governed by and
construed in accordance with the laws of the State of Georgia.

     (b)  Each Borrower hereby irrevocably and unconditionally submits,
for itself and its property, to the nonexclusive jurisdiction of the
Superior Court of any county in the Northern District of the State of
Georgia and of the United States District Court for the Northern
District of Georgia, and any appellate court from any thereof, in any
action or proceeding arising out of or relating to this Agreement or
the other Loan Documents, or for recognition or enforcement of any
judgment and each of the parties hereto hereby irrevocably and
unconditionally agrees that all claims in respect of any such action or
proceeding may be heard and determined in such Georgia State court or, to
the extent permitted by law, in such federal court.  Each of the parties
hereto agrees that a final judgment in any such action or proceeding
shall be conclusive and may be enforced in other jurisdictions by suit on
the judgment or in any other manner provided by law.  Nothing in this
Agreement shall affect any right that the Administrative Agent, any
Issuing Bank, FCC as issuer of any Letter of Credit Guarantee or any
Lender may otherwise have to bring any action or proceeding relating to
this Agreement or the other Loan Documents against any Borrower or its
properties in the courts of any jurisdiction.

     (c)  Each Borrower hereby irrevocably and unconditionally waives,
to the fullest extent it may legally and effectively do so, any
objection which it may now or hereafter have to the laying of venue
of any suit, action or proceeding arising out of or relating to this
Agreement or the other Loan Documents in any court referred to in
paragraph (b) of this Section.  Each of the parties hereto hereby
irrevocably waives, to the fullest extent permitted by law, the defense
of an inconvenient forum to the maintenance of such action or proceeding
in any such court.

     (d)  Each party to this Agreement irrevocably consents to service
of process in the manner provided for notices in Section 15.1.  Nothing
in this Agreement will affect the right of any party to this Agreement
to service of process in any other manner permitted by law.

     (e)  Each Borrower, the Administrative Agent and each Lender hereby
knowingly, intentionally and voluntarily waive trial by jury in any
action or proceeding of any kind or nature in any court in which an
action may be commenced by or against a Borrower, the Administrative
Agent or such Lender arising out of this Agreement, the Collateral or
any assignment thereof or by reason of any other cause or dispute
whatsoever between the Borrowers and the Administrative Agent or any
Lender of any kind or nature.

     Section 15.18  Counterparts.  This Agreement may be executed in any
number of counterparts and by different parties hereto in separate
counterparts, each of which when so executed shall be deemed to be an
original and shall be binding upon all parties, their successors and
assigns, and all of which taken together shall constitute one and the
same agreement.

     Section 15.19  Reproduction of Documents.  This Agreement, each of
the Loan Documents and all documents relating thereto, including, without
limitation, (a) consents, waivers and modifications that may hereafter be
executed, (b) documents received by the Administrative Agent or any
Lender, and (c) financial statements, certificates and other information
previously or hereafter furnished to the Administrative Agent or any
Lender, may be reproduced by the Administrative Agent or such Lender by
any photographic, photostatic, microfilm, microcard, miniature
photographic or other similar process and such Person may destroy any
original document so produced.  Each party hereto stipulates that, to
the extent permitted by Applicable Law, any such reproduction shall be
as admissible in evidence as the original itself in any judicial or
administrative proceeding (whether or not the original shall be in
existence and whether or not such reproduction was made by the
Administrative Agent or such Lender in the regular course of business),
and any enlargement, facsimile or further reproduction of such
reproduction shall likewise be admissible in evidence.

     Section 15.20  Term of Agreement.  This Agreement shall remain in
effect from the Agreement Date through the Termination Date and thereafter
until all Secured Obligations shall have been irrevocably paid and
satisfied in full.  No termination of this Agreement shall affect the
rights and obligations of the parties hereto arising prior to such
termination.

     Section 15.21  Pro-Rata Participation.

     (a)  Each Lender agrees that if, as a result of the exercise of a
right of setoff, banker's lien or counterclaim or other similar right
or the receipt of a secured claim it receives any payment in respect of
the Secured Obligations, it shall promptly notify the Administrative
Agent thereof (and the Administrative Agent shall promptly notify the
other Lenders).  If, as a result of such payment, such Lender receives
a greater percentage of the Secured Obligations owed to it under this
Agreement than the percentage received by any other Lender, such Lender
shall purchase a participation (which it shall be deemed to have
purchased simultaneously upon the receipt of such payment) in the
Secured Obligations then held by such other Lenders so that all such
recoveries of principal and interest with respect to all Secured
Obligations owed to each Lender shall be pro rata on the basis of its
respective amount of the Secured Obligations owed to all Lenders,
provided that if all or part of such proportionately greater payment
received by such purchasing Lender is thereafter recovered by or on
behalf of the  Borrower from such Lender, such purchase shall be
rescinded and the purchase price paid for such participation shall be
returned to such Lender to the extent of such recovery, together with
interest thereon at the rate, if any, required to be paid on the
amount recovered from such purchasing Lender.

     (b)  Each Lender which receives such a secured claim shall, to
the extent practicable, exercise its rights in respect of such secured
claim in a manner consistent with the rights of the Lenders entitled
under this Section 15.22 to share in the benefits of any recovery on
such secured claim.

     (c)  Each Lender shall include in any arrangement or agreement
it enters into with any participant in such Lender's interests
hereunder, an undertaking by such participant substantially similar
to the foregoing subsections (a) and (b).

     (d)     The Borrowers expressly consent to the foregoing
arrangements and agree that any holder of a participation in any
Secured Obligation so purchased or otherwise acquired of which such
Borrower has received notice may exercise any and all rights of
banker's lien, set-off or counterclaim with respect to any and all
monies owing by such Borrower to such holder as fully as if such holder
were a holder of such Secured Obligation in the amount of the
participation held by such holder.

     IN WITNESS WHEREOF, the parties hereto have caused this Agreement
to be executed by their duly authorized officers in several counterparts
all as of the day and year first written above.

                                  BORROWERS:

                                  MASTEC, INC.

[Corporate Seal]

Attest:                           By:
                                      -----------------------
                                  Jose Sariego
------------------------          Senior Vice President
Steven E. Davis
Assistant Secretary

                                  FLEET CAPITAL CORPORATION, as
                                  Administrative Agent and as a Lender

                                  By:
                                      ----------------------------
                                      Dennis S. Losin
                                      Senior Vice President

                                  Address:
                                  Fleet Capital Corporation
                                  300 Galleria Parkway
                                  Suite 800
                                  Atlanta, Georgia 30339
                                  Attn:  Loan Administration Manager
                                  Facsimile No.: (770) 859-2483

                                  CHURCH & TOWER, INC.

                                  By:
                                      -----------------------------
                                      Jose Sariego
                                      Vice President

                                  CHURCH & TOWER ENVIRONMENTAL, INC.

                                  By:
                                      -----------------------------
                                      Jose Sariego
                                      Vice President

                                  CRUZ-CELL, INC.

                                  By:
                                      -----------------------------
                                      Jose Sariego
                                      Vice President

                                  MASTEC TELCOM & ELECTRICAL
                                  SERVICES, INC.

                                  By:
                                      -----------------------------
                                      Jose Sariego
                                      Vice President

                                  DRESSER/AREIA CONSTRUCTION, INC.

                                  By:
                                      -----------------------------
                                      Jose Sariego
                                      Vice President

                                  FLAIRE INCORPORATED

                                  By:
                                      ------------------------------
                                  Jose Sariego
                                  Vice President

                                  GMR TELECOM, L.L.C.

                                  By:
                                      ------------------------------
                                      Jose Sariego
                                      Vice President

                                  MASTEC INTEGRATION SYSTEMS, INC.

                                  By:
                                      ------------------------------
                                      Jose Sariego
                                      Vice President

                                  MASTEC NETWORK SERVICES, INC.

                                  By:
                                      ------------------------------
                                      Jose Sariego
                                      Vice President

                                  MASTEC NORTH AMERICA, INC.

                                  By:
                                      ------------------------------
                                       Jose Sariego
                                       Vice President

                                  MASTEC NORTH CAROLINA, INC.

                                  By:
                                      ------------------------------
                                      Jose Sariego
                                      Vice President

                                  MASTEC VIRGINIA, INC.

                                  By:
                                      ------------------------------
                                      Jose Sariego
                                      Vice President

                                  PHASECOM AMERICA INC.

                                  By:
                                      ------------------------------
                                      Jose Sariego
                                      Vice President

                                  PROTEL IND., INC.

                                  By:
                                      ------------------------------
                                      Jose Sariego
                                      Vice President

                                  RENEGADE OF IDAHO, INC.

                                  By:
                                      ------------------------------
                                      Jose Sariego
                                      Vice President

                                  S.S.S. CONSTRUCTION, INC.

                                  By:
                                      ------------------------------
                                      Jose Sariego
                                      Vice President

                                  UPPER VALLEY UTILITIES CORP.

                                  By:
                                      ------------------------------
                                      Jose Sariego
                                      Vice President

                                  WILDE HOLDING CO., INC.

                                  By:
                                      ------------------------------
                                      Jose Sariego
                                      Vice President

                                  WILDE ACQUISITION CO., INC.

                                  By:
                                      ------------------------------
                                      Jose Sariego
                                      Vice President

                                  NORTHLAND CONTRACTING, INC.

                                  By:
                                      ------------------------------
                                      Jose Sariego
                                      Vice President

                                  WILDE OPTICAL SERVICE, INC.

                                  By:
                                      ------------------------------
                                      Jose Sariego
                                      Vice President

                                  MASTEC FC, INC.

                                  By:
                                      ------------------------------
                                      Jose Sariego
                                      Vice President

                                  MASTEC REAL ESTATE HOLDINGS, INC.

                                  By:
                                      ------------------------------
                                      Jose Sariego
                                      Vice President

                                  MASTEC OF TEXAS, INC.

                                  By:
                                      ------------------------------
                                      Jose Sariego
                                      Vice President

                                  MASTEC TC, INC.

                                  By:
                                      ------------------------------
                                      Jose Sariego
                                      Vice President

                                  STACKHOUSE REAL ESTATE HOLDINGS, INC.

                                  By:
                                      ------------------------------
                                      Jose Sariego
                                      Vice President

                                ANNEX A
                              COMMITMENTS

           Lender                               Commitment
------------------------------------------------------------
Fleet Capital Corporation                      $75,000,000
------------------------------------------------------------
            Total                              $75,000,000
============================================================

                                ANNEX B
                             PRICING MATRIX

Level             Leverage           LIBOR       Base Rate
                    Ratio            Loans         Loans
----------       -------------      -------      ---------

Level I          _< 1.50:1           2.00%         0.50%

Level II          > 1.50:1 and
                 _< 2.00:1           2.25%         0.75%

Level III         > 2.00:1 and
                 _< 2.50:1           2.50%         1.00%

Level IV          > 2.50:1 and
                 _< 3.00:1           2.75%         1.25%

Level V           > 3.00:1           3.00%         1.50%

                                ANNEX D

                REAL PROPERTY TO BE SUBJECT TO MORTGAGES
                ----------------------------------------

   Column 1                   Column 2                Column 3
------------------------------------------------------------------------
Real Estate to be        Real Estate to be       Land Held for Sale
     Mortgaged            to be Mortgaged
    at Closing             Post Closing
--------------------   -----------------------   -----------------------

209 Art Bryan Drive    7221 Dr. Martin Luther    SR540 Reclamation
Asheboro, NC 27203         King Blvd.
                           Tampa, FL 33619
                                                Located on north side of
                                                State Road 540,
                                                approximately one mile
                                                east of US Highway 98 in
                                                Lakeland, Polk County,
                                                Florida (485 acres)

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

Highway #2 East       2801 SW 47th Avenue        US 41 Property:
Shevlin, MN 56676     Ft. Lauderdale, FL 33314   3050 Jacaranda Pkwy E
                                                 Ft. Myers, FL

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

3155 NW 77th Avenue   4250 N. Powerline Road     US 41 Property:
Miami, FL 33122       Pompano Beach, Florida     16701 N Cleveland Ave
                             33073               Ft. Myers, FL

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

                                                 2801 SW 46 Ave
                                                 Davie, FL
------------------------------------------------------------------------

                                ANNEX E

                         TRANSFER INSTRUCTIONS
                         ---------------------

Bank Name:     Fleet National Bank
Location:      1 Constitution Plaza
               Hartford, Connecticut
ABA Routing No.:  011 900 571
Credit Account No.:  9369337552
For Credit to Account of:  Fleet Capital Corporation
Reference:  MasTec, Inc.

                                ANNEX F

                       APPROVED ACCOUNT DEBTORS
                       ------------------------

Adelphia Communications Corp.

Verizon Communications

Virginia Power/Dominion Resources

SBC Communications, Inc.

Cox Communications, Inc.

Comcast Corporation

Sprint Corp.

Hughes Electronics/DirecTV

Qwest Communications/US West, Inc.

Sierra Pacific Resources, Inc.

Sierra Touch America LLC

Florida Power & Light Co.

                                ANNEX G

                      EBITDA ADJUSTMENT AMOUNTS
                      -------------------------

(all figures in millions)

First Fiscal Quarter, 2001  $22 - increase in reserve for doubtful accounts

Second Fiscal Quarter, 2001 $16 - increase in reserve for doubtful accounts
                            $6.5 - write-off of equity investment in customer
                            $.7 - severance compensation to former officer

Third Fiscal Quarter, 2001  $106.7 - increase in reserve for doubtful accounts
                            $9.8 - severance compensation to former officer
                            $10.0 - write-off of certain foreign assets

Fourth Fiscal Quarter, 2001 $35 - increase in reserve for doubtful accounts

Fourth Fiscal Quarter,      Effect on MasTec's NAOperations' Net Income of
2001, Fiscal Year 2002      compliance with FASB 142.
and thereafter

                                ANNEX H

Canadian Priming Liens
----------------------

Amounts due to/for:

1.   Sales and excise taxes.
2.   Employee payroll deductions (UIC, CPP, income tax)
3.   Provincial taxes
4.   Workers' Compensation Board
5.   Accrued wages, commissions, vacation pay to employees
6.   Pension plans
7.   Overdue rent and real property taxes

                                ANNEX I

From and After          Deduct from Eligible Fixed Assets Value
-----------------       ---------------------------------------

July 1, 2002               $ 1,875,000

October 1, 2002            $ 3,750,000

January 1, 2003            $ 5,625,000

April 1, 2003              $ 7,500,000

July 1, 2003               $ 9,375,000

October 1, 2003            $11,250,000

January 1, 2004            $13,125,000

April 1, 2004              $15,000,000

July 1, 2004               $16,875,000

October 1, 2004            $18,750,000

January 1, 2005            $20,625,000

April 1, 2005              $22,500,000

July 1, 2005               $24,375,000

October 1, 2005            $26,250,000

January 1, 2006            $28,125,000

April 1, 2006              $30,000,000$125,000,000
             REVOLVING CREDIT AND SECURITY AGREEMENT

                  Dated as of February 7, 2002

                            Between

                          MASTEC, INC.
                  CERTAIN OF ITS SUBSIDIARIES
                        (the Borrowers)

                               and

                    FLEET CAPITAL CORPORATION
                      WACHOVIA BANK, N.A.
                 LASALLE BUSINESS CREDIT, INC.
                    JPMORGAN CHASE BANK
                PNC BANK, NATIONAL ASSOCIATION
                       (the Lenders)

                            and

                   FLEET CAPITAL CORPORATION
                  (the Administrative Agent)

                     WACHOVIA BANK, N.A.
                   (the Syndication Agent)

                            and

                 LASALLE BUSINESS CREDIT, INC.
                     JPMORGAN CHASE BANK
                  (the Documentation Agents)

    _________________________________________________

                         Arranged by:

                    FLEET SECURITIES, INC.
    _________________________________________________

EXECUTION COPY

                ASSUMPTION AND AMENDMENT AGREEMENT

                  Dated as of February 7, 2002

     Reference is made to the Revolving Credit and Security Agreement
dated as of January 22, 2002 (as amended, modified, supplement, or
restated and in effect from time to time, the "Credit Agreement"),
among MasTec, Inc., a Florida corporation ("MasTec"), certain of its
subsidiaries (with MasTec, collectively, the "Borrowers"), the lenders
parties thereto, and Fleet Capital Corporation, a Rhode Island
corporation, as administrative agent (the "Administrative Agent")
for said lenders.  Unless otherwise defined herein, terms defined in
the Credit Agreement are used herein with the same meanings.

     Each of the undersigned, WACHOVIA BANK, N.A., LASALLE BUSINESS
CREDIT, INC., JPMORGAN CHASE BANK and PNC BANK, NATIONAL ASSOCIATION
(each, an "Additional Lender"), FCC, as a Lender and as the
Administrative Agent, and the Borrowers hereby agree as follows:

     1.  Each Additional Lender hereby agrees that, effective as of
February 7, 2002 (the "Effective Date"), and subject to the satisfaction
on or prior to the Effective Date of the conditions set forth in Section
2.5(b)(ii) of the Credit Agreement, (i) each Additional Lender will
become a Lender under the Credit Agreement, (ii) the Commitment of each
Lender, including each Additional Lender, will be as set forth on Annex
1 hereto, (iii) each Additional Lender will be bound by all the terms
and provisions of the Credit Agreement binding upon each Lender,
including, without being limited to, Sections 2.5(b)(iii) and 4.7 and
Article 14, (iv) until such time as MasTec's Energy Group's systems are
upgraded, its Eligible Unbilled Accounts will be estimated based on the
Energy Group's trailing 12-month revenues, and (v) each Additional
Lender will pay to the Administrative Agent in accordance with the
terms of Section 2.2(a)(iii) an amount (each such Additional Lender's
"Initial Loan") such that, after giving effect to all Initial Loans, the
Net Outstandings of the Lenders shall be Ratable.  Each Additional Lender
acknowledges and agrees that the amount of its Initial Loan will be
applied by the Borrowers to repay Loans outstanding from FCC and to
permanently reduce FCC's outstanding Commitment.

     2.  Each Borrower consents to the foregoing and agrees to deliver
to the Administrative Agent, on or prior to the Effective Date, any
evidence of authorization, opinions and certificates required pursuant
to Section 2.5(b)(ii) of the Credit Agreement and an original Revolving
Credit Note to the order of each Lender in the amount of such Lender's
Commitment after giving effect to the Commitment Increase reflected in
Annex 1.

     3.  The Credit Agreement is hereby amended, effective as of the
Effective Date, subject to the satisfaction on or prior to the Effective
Date of the conditions set forth in Section
2.5(b)(ii) of the Credit Agreement, by:

         (i)  amending Section 1.1 Definitions by adding thereto in the
              appropriate alphabetical order the following new
              definitions:

              "Documentation Agent" means each of JPMorgan Chase Bank
              and LaSalle Business Credit, Inc.

              "Syndication Agent" means Wachovia Bank, N.A.

	 (ii) amending subsection (b) of Section 15.9 Amendments in its
	 entirety to read as follows:

         (b)  (1)  Without the prior unanimous written consent of the
Lenders, no amendment, consent or waiver shall (A) increase the amount or
extend the time of any Lender's obligation to make Loans or (B) extend
the originally scheduled time or times of repayment of the principal of
any Loan or (C) alter (other than to accelerate or make more frequent) the
time or times of payment of interest on any Loan or of any fees payable
for the account of the Lenders or (D) decrease the amount of the principal
of any Loan or the rate of interest thereon or (E) decrease the amount of
any commitment fee or other fee payable hereunder for the account of the
Lenders' or (F) permit any subordination of the principal of or interest
on any Loan or (G) permit any amendment to Section 4.18.  Without the
prior unanimous written consent of the Lenders, no Borrower or material
Guarantor shall be released from its liability for the Secured Obligations
nor shall Collateral be released in excess of the amount thereof disposed
of in any Fiscal Year in compliance with Section 8.7(a).  Except to the
extent expressly provided in Sections 4.7 and 14.1, without the prior
unanimous written consent of the Lenders, no amendment shall be made to
the following definitions:  "Borrowing Base" or the defined terms used
therein, "Eligible Assignee", "Ratable", "Ratable Share", "Commitment
Percentage", "Letter of Credit Guarantee Facility", "Secured Obligations"
(other than to include additional obligations of the Loan Parties owing
to all Lenders), "Lenders" or "Required Lenders", or to the provisions of
this Section 15.9 or the provisions of Article 12.  Neither the
Administrative Agent nor any Lender shall consent to any amendment to or
waiver of the amortization, deferral or subordination provisions of any
instrument or agreement evidencing or relating to obligations (whether
or not Debt) of the Borrowers that are expressly subordinate to any of
the Secured Obligations if such amendment or waiver would be adverse to
the Lenders in their capacities as Lenders hereunder, without the prior
written consent of each Lender affected thereby.

              (2)  Without the consent of the Lenders whose Commitment
Percentages are equal to 66-2/3% or more (or if the Commitments have been
terminated, the Lenders holding at least 66-2/3% of the outstanding
principal of and accrued interest on all Loans and Reimbursement
Obligations), permit any amendment to Section 4.7(d).

provided, however, that notwithstanding anything herein to the contrary,
the Required Lenders shall have the right to waive any Default or Event
of Default and the consequences hereunder of such Default or Event of
Default provided only that such Default or Event of Default does not
arise under Section 12.1(g) or (h) or out of a breach of or failure to
perform or observe any term, covenant or condition of this Agreement or
any other Loan Document (other than the provisions of Article 12 of this
Agreement) the amendment of which requires the unanimous or "super
majority" consent of the Lenders.  The Required Lenders shall have the
right, with respect to any Default or Event of Default that may be
waived by them, to enter into an agreement with the Borrowers providing
for the forbearance from the exercise of any remedies provided hereunder
or under the other Loan Documents without thereby waiving any such
Default or Event of Default.

     4.  This Assumption Agreement shall be governed by and construed in
accordance with the laws of the State of Georgia.

     5.  This Assumption Agreement may be signed in multiple counterparts,
each of which shall be an original and all of which taken together shall
constitute one and the same agreement.

     IN WITNESS WHEREOF, the parties hereto have caused this Assumption
Agreement to be executed and delivered by their officers thereunto duly
authorized, as of the date first above written.

                                   FLEET CAPITAL CORPORATION, as
                                   Administrative Agent and as a Lender

                                   By:	_______________________________
                                   Dennis S. Losin
                                   Senior Vice President

	                           WACHOVIA BANK, N.A., as a Lender

                                   By: ________________________________
                                   Name: ______________________________
                                   Title: _____________________________

                                   LASALLE BUSINESS CREDIT, INC., as a
                                   Lender

                                   By: ________________________________
                                   Name: ______________________________
                                   Title: _____________________________

                                   JPMORGAN CHASE BANK, as a Lender

                                   By: ________________________________
                                   Name: ______________________________
                                   Title: _____________________________

                                   PNC BANK, NATIONAL ASSOCIATION, as a
                                   Lender

                                   By: ________________________________
                                   Name: ______________________________
                                   Title: _____________________________

                                   BORROWERS:

                                   MASTEC, INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   CHURCH & TOWER, INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   CHURCH & TOWER ENVIRONMENTAL, INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   CRUZ-CELL, INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   DRESSER/AREIA CONSTRUCTION, INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   FLAIRE INCORPORATED

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   GMR TELECOM, L.L.C.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   MASTEC INTEGRATION SYSTEMS, INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   MASTEC NETWORK SERVICES, INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   MASTEC NORTH AMERICA, INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   MASTEC NORTH CAROLINA, INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   MASTEC TELCOM & ELECTRICAL SERVICES, INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   MASTEC VIRGINIA, INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   PHASECOM AMERICA INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   PROTEL IND., INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   RENEGADE OF IDAHO, INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   S.S.S. CONSTRUCTION, INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   UPPER VALLEY UTILITIES CORP.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   WILDE HOLDING CO., INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   WILDE ACQUISITION CO., INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   NORTHLAND CONTRACTING, INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   WILDE OPTICAL SERVICE, INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   MASTEC FC, INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   MASTEC REAL ESTATE HOLDINGS, INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   STACKHOUSE REAL ESTATE HOLDINGS, INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   MASTEC OF TEXAS, INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                   MASTEC TC, INC.

                                   By: _______________________________
                                   Steven E. Davis
                                   Assistant Secretary

                                ANNEX 1
                              COMMITMENTS

Lender
(With Address for Notices)                    Commitment
----------------------------------------------------------------------

Fleet Capital Corporation                    $32,500,000
300 Galleria Parkway
Suite 800
Atlanta, Georgia 30339
Attention:  Loan Administration Manager
Facsimile:  (770) 859-2483

Wachovia Bank, N.A.                          $25,000,000
191 Peachtree Street
Atlanta, Georgia 30303
Attention:  Dan Denton
Facsimile: (404) 332-6920

LaSalle Business Credit, Inc.                $25,000,000
135 S. LaSalle Street
Suite 425
Chicago, Illinois 60603
Attention:  Raphael Shin
Facsimile: (312) 904-6450

JPMorgan Chase Bank                          $25,000,000
1166 Avenue of Americas
16th Floor
New York, New York 10036
Attention:  Robert Morrow
Facsimile: (212) 899-2929

PNC Bank, National Association               $17,500,000
201 S. Tryon Street
Suite 900
Charlotte, North Carolina 28202
Attention: Alex M. Council
Facsimile: (704) 342-8450
---------------------------------------------------------

Total                                       $125,000,000
=========================================================

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