Document:

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                                                                   EXHIBIT 10.12

                               FIRST AMENDMENT TO
                      AMENDED AND RESTATED CREDIT AGREEMENT

         THIS FIRST AMENDMENT TO AMENDED AND RESTATED CREDIT AGREEMENT
("Amendment") is made and entered into this 13th day of June, 2002, but
effective as of June 1, 2002 (the "Amendment Date"), by and among XETA
Technologies, Inc., an Oklahoma corporation (the "Borrower"), Bank One,
Oklahoma, N.A., and U.S. Bank National Association (formerly known as Firstar
Bank, N. A., successor by merger to Firstar Bank Missouri, National
Association), as Lenders under the Credit Agreement referred to below (the
"Lenders"), and Bank One, Oklahoma, N.A., as Agent (in such capacity, the
"Agent"), with reference to the following:

         A. The Borrower, the Lenders and the Agent are parties to that certain
Amended and Restated Credit Agreement dated as of October 31, 2001 (the "Credit
Agreement"), pursuant to which the Lenders severally agreed to make Loans to the
Borrower under the Facilities therein described.

         B. For the four fiscal quarters ended April 30, 2002, the Borrower
failed to maintain a Consolidated Debt Service Coverage Ratio of at least 1.15
to 1.0 as required by Section 6.24.2 of the Credit Agreement.

         C. The Borrower has requested that the Lenders and the Agent waive the
Default arising by virtue of its failure to maintain the required minimum
Consolidated Debt Service Coverage Ratio at April 30, 2002, and the Lenders and
the Agent have agreed to such request, subject to the terms and conditions set
forth in this Amendment.

         NOW, THEREFORE, in consideration of the premises and the mutual
covenants and agreements herein contained, and for other good and valuable
consideration, the receipt and adequacy of which are hereby acknowledged, the
parties hereby amend the Credit Agreement, effective as of the Amendment Date,
as follows:

1. DEFINITIONS. Capitalized terms used herein (including capitalized terms used
in the recitals above) but not otherwise defined have the respective meanings
assigned to them in the Credit Agreement.

2. WAIVER. As of the Amendment Date, and subject to the Borrower's satisfaction
of the conditions precedent set forth in Section 6 of this Amendment, the
Lenders and the Agent agree to waive the Borrower's non-compliance with Section
6.24.2 of the Credit Agreement at April 30, 2002, and any consequences of such
non-compliance (other than as set forth in this Amendment). The foregoing waiver
does not extend to any other existing Default or Unmatured Default (whether or
not known to the Borrower, the Lenders or the Agent) or to any Default or
Unmatured Default which may arise or occur after the Amendment Date. Nothing
contained in this Amendment shall be construed as waiving any other term or
condition of the Credit Agreement or any of the other Loan Documents or as
obligating the Lenders or the Agent to waive any future noncompliance or
Default.

<PAGE>

3. REDUCTION IN REVOLVING CREDIT FACILITY. As of the Amendment Date, (i) the
Aggregate Revolving Credit Commitment (i.e., the aggregate amount available for
borrowing under the Revolving Credit Facility) is hereby reduced from
$9,000,000.00 to $5,000,000.00, and (ii) the Revolving Commitment of each of the
Lenders is hereby reduced to the amount set forth opposite its name on the
signature pages hereto directly underneath the caption "Revolving Credit
Commitment."

4. CHANGE IN PRICING. Effective as of the Amendment Date and continuing until
the Obligations have been paid in full, the Applicable Margin for all Eurodollar
Loans (whether Revolving Loans, Term Loans or R/E Term Loans) will be 3.75%, the
Applicable Margin for all Floating Rate Loans (whether Revolving Loans, Term
Loans or R/E Term Loans) will be 1.00%, and the Applicable Fee Rate will be
0.45%. The foregoing percentage rates shall supersede the Applicable Margins and
Applicable Fee Rates set forth in the Pricing Schedule attached to the Credit
Agreement.

5. FINANCIAL COVENANTS AT JULY 31, 2002.

         A. Net Income Requirement. The Borrower covenants and agrees with the
Lenders that its Consolidated Net Income for the fiscal quarter ending July 31,
2002, will be at least $1.00. The Borrower further agrees that, in the event it
fails to achieve Consolidated Net Income of at least $1.00 for the fiscal
quarter ending July 31, 2002, such failure will constitute an immediate Default
under the Credit Agreement.

         B. Noncompliance With Financial Covenants. The Borrower acknowledges
that, in the event that (i) the Borrower's Consolidated Debt Service Coverage
Ratio determined as of July 31, 2002, for the four fiscal quarters then ending,
is less than 1.15 to 1.0, and/or (ii) the ratio of the Borrower's Consolidated
Funded Indebtedness determined as of July 31, 2002, to Consolidated EBITDA for
the four fiscal quarters then ending is greater than 2.75 to 1.0, the Borrower
will be in noncompliance with Section 6.24.2 and/or 6.24.3 of the Credit
Agreement (as the case may be) and such noncompliance will constitute an
immediate Default under the Credit Agreement. In the event the Lenders are
requested to waive the Borrower's noncompliance with Section 6.24.2 and/or
6.24.3 of the Credit Agreement at July 31, 2002, the Lenders agrees to consider
such request, provided that the Borrower is then in compliance with all other
terms and conditions of the Credit Agreement (as amended by this Amendment) and
has satisfied the net income requirement set forth in Section 5.A of this
Amendment. However, the Lenders will not be obligated to approve such request,
and the Borrower acknowledges that the Lenders have given no assurance or
commitment that any such waiver request will be approved and that the Lenders
may refuse any such request in the exercise of their sole and absolute
discretion. If any such waiver request is granted, the Lenders agree that no
additional waiver or amendment fee will be required of the Borrower and that the
Applicable Margins and Applicable Fee Rate set forth in Section 4 of this
Agreement will not be increased as a condition of granting such waiver.

6. CONDITIONS PRECEDENT. This Amendment shall become effective as of the
Amendment Date, subject to the Borrower's satisfaction of the following
conditions precedent (in addition to the conditions precedent set forth in
Article IV of the Credit Agreement):

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         A. Execution of Documents. This Amendment shall have been duly and
validly authorized, executed and delivered to the Agent and the Lenders by the
Borrower.

         B. Resolutions. The Bank shall have received a copy of the resolutions
of the Board of Directors of the Borrower authorizing the decrease in the
Revolving Credit Facility, the modification to the Applicable Margins and the
execution, delivery and performance of this Amendment and the Credit Agreement
(as amended by this Amendment).

         C. Accuracy of Representations and Warranties. All representations and
warranties made by the Borrower in the Credit Agreement and the other Loan
Documents and in Section 5 hereof shall be true and correct in all material
respects as of the Amendment Date (except to the extent any of such
representations and warranties with respect to the financial condition of the
Borrower refer to an earlier specified date).

         D. No Default. There shall not have occurred any additional Default or
Unmatured Default as of the Amendment Date, and the Borrower shall be current in
payment of all principal, interest and fees due and owing to the Agent or the
Lenders as of the Amendment Date.

         E. Waiver/Amendment Fee. The Borrower shall have paid to the Agent, for
the account of each Lender in accordance with each Lender's Pro Rata Share, a
waiver/amendment fee of $21,223.49 (which amount is equal to 1/10th of 1% of the
remaining aggregate Commitments).

7. REPRESENTATIONS AND WARRANTIES. All representations and warranties of
Borrower contained in Article V of the Credit Agreement remain true and correct
(except to the extent any representations and warranties as to the Borrower's
financial condition relate solely to an earlier specified date) and are hereby
remade and restated as the date hereof and shall survive the execution and
delivery of this Amendment. The Borrower further represents and warrants as
follows:

         A. Authority. The Borrower has all requisite power and authority and
has been duly authorized to decrease the amount of the Aggregate Revolving
Credit Commitment, to modify the Applicable Margins, and to execute, deliver and
perform its obligations under this Amendment and the Credit Agreement (as
amended by this Amendment).

         B. Binding Obligations; Enforceability. This Amendment and the Credit
Agreement (as amended by this Amendment) are valid and legally binding
obligations of the Borrower, enforceable in accordance with their respective
terms, except as limited by applicable bankruptcy, insolvency or other laws
affecting the enforcement of creditors' rights generally.

         C. No Conflict; Government Consent. Neither the execution and delivery
by the Borrower of this Amendment, nor the consummation of the transactions
therein contemplated, nor compliance with the provisions thereof, will violate
(i) any law, rule, regulation, order, writ, judgment, injunction, decree or
award binding on the Borrower or any of its Subsidiaries, or (ii) the Borrower's
or any Subsidiary's articles or certificate of incorporation, partnership
agreement,

                                       3
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certificate of partnership, articles or certificate of organization, by-laws, or
operating or other management agreement, as the case may be, or (iii) the
provisions of any indenture, instrument or agreement to which the Borrower or
any of its Subsidiaries is a party or is subject, or by which it, or its
Property, is bound, or conflict with or constitute a default thereunder, or
result in, or require, the creation or imposition of any Lien in, of or on the
Property of the Borrower or any of its Subsidiaries pursuant to the terms of any
such indenture, instrument or agreement. No order, consent, adjudication,
approval, license, authorization, or validation of, or filing, recording or
registration with, or exemption by, or other action in respect of any
governmental or public body or authority, or any subdivision thereof, which has
not been obtained by the Borrower or any of its Subsidiaries, is required to be
obtained by the Borrower or any of its Subsidiaries in connection with the
execution and delivery of this Amendment, the borrowings under the Credit
Agreement (as amended hereby), the payment and performance by the Borrower of
the Obligations, or the legality, validity, binding effect or enforceability of
this Amendment or the Credit Agreement (as amended by this Amendment).

         D. No Material Adverse Change. Since April 30, 2002 (the date of the
latest financial statements of the Borrower which have been delivered to the
Agent and the Lenders), there has been no adverse change in the business,
Property, prospects, condition (financial or otherwise) or results of operations
of the Borrower and its Subsidiaries which could reasonably be expected to have
a Material Adverse Effect.

8. MISCELLANEOUS.

         A. Effect of Amendment. The terms of this Amendment shall be
incorporated into and form a part of the Credit Agreement. Except as amended,
modified and supplemented by this Amendment, the Credit Agreement shall continue
in full force and effect in accordance with its original stated terms, all of
which are hereby reaffirmed in every respect as of the date hereof. In the event
of any irreconcilable inconsistency between the terms of this Amendment and the
terms of the Credit Agreement, the terms of this Amendment shall control and
govern, and the agreements shall be interpreted so as to carry out and give full
effect to the intent of this Amendment. All references to the "Credit Agreement"
appearing in any of the Loan Documents shall hereafter be deemed references to
the Credit Agreement as amended, modified and supplemented by this Amendment.

         B. Descriptive Headings. The descriptive headings of the several
sections of this Amendment are inserted for convenience only and shall not be
used in the construction of the content of this Amendment.

         C. Governing Law. This Amendment shall be construed and enforced in
accordance with, and the rights of the parties shall be governed by, the laws of
the State of Oklahoma.

         D. Reimbursement of Expenses. The Borrower agrees to pay the reasonable
fees and out-of-pocket expenses of Crowe & Dunlevy, counsel to the Agent,
incurred in connection with the preparation of this Amendment and the
consummation of the transactions contemplated hereby.

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         E. Release by Borrower. In consideration of the waivers and other
agreements of the Lenders and the Agent contained herein, the Borrower, for
itself and its officers, directors, agents, employees, successors and assigns,
hereby releases, acquits and forever discharges each of the Lenders and the
Agent, and each of their respective parent, subsidiary and affiliated companies
and each of their respective officers, directors, agents, employees, successors,
and assigns, and all other persons acting for or on behalf of the Lenders and/or
the Agent, of and from any and all manner of actions, causes of actions, suits,
debts, accounts, conveyances, agreements, damages, claims, demands, liabilities,
costs, and expenses of whatsoever kind or nature, including attorney's fees, in
law or in equity, known or unknown, anticipated or unanticipated and howsoever
arising or accruing, which the Borrower may now have or may claim to have
against the parties released or any of them, including, without limitation,
those arising out of or relating in any way to the Credit Agreement or the
administration of the Facilities thereunder, any other Loan Document or any
other agreement or document relating to the Facilities. It is understood and
agreed by the Borrower that this is a full and final release covering any and
all of the Borrower's actions, claims, debts, judgment, damages, objections,
costs, attorney's fees, demands or liabilities, whether known or unknown,
undisclosed and/or unanticipated, which may have arisen, or may arise from any
act or omission, prior to the date of the execution and delivery of this
Amendment.

                [REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK.
                      SIGNATURES APPEAR ON FOLLOWING PAGE.]

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         IN WITNESS WHEREOF, the Borrower, the Lenders and the Agent have
executed and delivered this Amendment on the day and year first set forth above.

<Table>
<S>                                  <C>
                                     XETA TECHNOLOGIES, INC.

                                     By: /s/ Robert B. Wagner
                                         -------------------------------------------------
                                     Name: Robert B. Wagner
                                     Title:   Secretary and Chief Financial
                                              Officer

Revolving Loan Commitment            BANK ONE, OKLAHOMA, N.A.,
from and after Amendment             Individually and as Agent
Date:    $   2,750,000.00

                                     By: /s/ Timothy T. Koski
                                         -------------------------------------------------
                                     Name:  Timothy T. Koski
                                     Title:    Vice President

Revolving Loan Commitment:           U.S. BANK NATIONAL ASSOCIATION,
from and after Amendment             (formerly known as Firstar Bank, N. A., successor
Date:    $   2,250,000.00            by merger to Firstar Bank Missouri, National
                                     Association)

                                     By: /s/ Gregory B. Vatterott, Jr.
                                         -------------------------------------------------
                                     Name: Gregory B. Vatterott, Jr.
                                     Title:   Vice President
</Table>

                                       6
<PAGE>

                              CONSENT OF GUARANTOR

         The undersigned hereby (i) acknowledges and consents to the execution
and delivery of the above and foregoing First Amendment to Credit Agreement,
(ii) confirms that the Subsidiary Guaranty of the undersigned will continue in
full force and effect as security for payment and performance of all of the
"Guaranteed Obligations," as such term is used in the Subsidiary Guaranty, and
(iii) ratifies and reaffirms the Subsidiary Guaranty.

         No inference shall be drawn from the undersigned's execution of this
Consent that consent or approval of the undersigned is required for this or any
future modification or amendment of or supplement to the Credit Agreement or
other Loan Document, or for this or any future increase, decrease, extension or
renewal of the Guaranteed Obligations.

         Capitalized terms used in this Consent and not otherwise defined have
the respective meanings assigned to them in the Credit Agreement referred to in
the above and foregoing First Amendment to Credit Agreement.

                                U.S. TECHNOLOGIES SYSTEMS, INC.

                                By: /s/ Robert B. Wagner
                                    ----------------------------------------
                                Name: Robert B. Wagner
                                      --------------------------------------
                                Title: Vice President
                                       -------------------------------------

                                       7<PAGE>
                                                                   EXHIBIT 10.13

                               SECOND AMENDMENT TO
                      AMENDED AND RESTATED CREDIT AGREEMENT

         THIS SECOND AMENDMENT TO AMENDED AND RESTATED CREDIT AGREEMENT
("Amendment") is made and entered into this 31st day of October, 2002, but
effective as of September 10, 2002 (the "Amendment Date"), by and among XETA
Technologies, Inc., an Oklahoma corporation (the "Borrower"), Bank One,
Oklahoma, N.A., and U.S. Bank National Association, as Lenders under the Credit
Agreement referred to below (the "Lenders"), and Bank One, Oklahoma, N.A., as
Agent (in such capacity, the "Agent"), with reference to the following:

         A. The Borrower, the Lenders and the Agent are parties to that certain
Amended and Restated Credit Agreement dated as of October 31, 2001, as amended
by that certain First Amendment to Amended and Restated Credit Agreement dated
effective as of June 1, 2002 (the "Credit Agreement").

         B. The Borrower has requested that the Lenders and the Agent (i) extend
the availability of the Revolving Credit Facility and the maturities of the
Revolving Loans, the Term Loans and the R/E Term Loans, (ii) waive certain
Defaults arising by virtue of the Borrower's failure to comply with certain
financial covenants set forth in the Credit Agreement at July 31, 2002, (iii)
modify certain covenants set forth in the Credit Agreement, and (iv) agree to
certain other changes in the terms of the Credit Agreement and the Facilities
established thereunder. The Lenders and the Agent have agreed to the foregoing
requests, subject to the terms and conditions set forth in this Amendment.

         NOW, THEREFORE, in consideration of the premises and the mutual
covenants and agreements herein contained, and for other good and valuable
consideration, the receipt and adequacy of which are hereby acknowledged, the
parties hereby amend the Credit Agreement, effective as of the Amendment Date,
as follows:

1. DEFINITIONS. Capitalized terms used herein (including capitalized terms used
in the recitals above) but not otherwise defined have the respective meanings
assigned to them in the Credit Agreement.

2. WAIVERS. Effective as of the Amendment Date, and subject to the Borrower's
satisfaction of the conditions precedent set forth in Section 6 of this
Amendment, the Lenders and the Agent agree to waive the Borrower's
non-compliance with Sections 6.24.2 (Debt Service Coverage Ratio) and 6.24.3
(Leverage Ratio) of the Credit Agreement at July 31, 2002, and any consequences
of such non-compliance (other than as set forth in this Amendment). The
foregoing waivers do not extend to any other existing Default or Unmatured
Default (whether or not known to the Borrower, the Lenders or the Agent) or to
any Default or Unmatured Default that may arise or occur after the Amendment
Date. Nothing contained in this Amendment shall be construed as waiving any
other term or condition of the Credit Agreement or any of the other Loan
Documents or as obligating the Lenders or the Agent to waive any future
noncompliance or Default.
<PAGE>

3. MODIFICATION OF FACILITIES. Effective as of the Amendment Date, and subject
to the Borrower's satisfaction of the conditions precedent set forth in this
Amendment:

         A. Extension of Revolving Credit Facility. The availability of the
Revolving Credit Facility and the maturity of the Revolving Loans are hereby
extended to November 30, 2002. Accordingly, the definition of the term
"Revolving Credit Facility Termination Date" appearing in Section 1.1 of the
Credit Agreement is hereby amended by replacing the reference to the date
"October 31, 2002" with the date "November 30, 2002."

         B. Reduction in Revolving Credit Facility. The Aggregate Revolving
Credit Commitment (i.e., the aggregate amount available for borrowing under the
Revolving Credit Facility) is hereby reduced from $5,000,000.00 to
$2,000,000.00, and the Revolving Commitment of each of the Lenders is hereby
reduced to the amount set forth opposite its name on the signature pages hereto
directly underneath the caption "Revolving Credit Commitment."

         C. Extension of Maturities of Term Loans and R/E Term Loans. The
maturity dates of the Term Notes and the R/E Term Notes are hereby extended to
November 30, 2003. Accordingly, the reference to the date "October 31, 2003"
appearing in each of Sections 2.3.2 and 2.3.3 of the Credit Agreement are hereby
amended to read "November 30, 2003," and the reference to "twenty-four (24)
consecutive monthly payments" appearing in each of Sections 2.3.2 and 2.3.3 of
the Credit Agreement are hereby amended to read "twenty-five (25) consecutive
monthly payments."

         D. No Obligation to Grant Further Extensions. The Borrower acknowledges
that, notwithstanding the references in the Credit Agreement and this Amendment
to dates or periods of time subsequent to November 30, 2002, (i) the Lenders
will not be obligated to further extend the availability of the Revolving Credit
Facility or the maturities of the Revolving Loans, the Term Loans or the R/E
Term Loans, (ii) the Lenders have given no assurances or commitment that any
extension request will be approved, (iii) the Lenders may refuse any extension
request in the exercise of their sole and absolute discretion, and (iv) if any
extension request is approved, the Lenders may condition such approval on the
Borrower's satisfaction of certain requirements, including the making of further
modifications to the Credit Agreement and/or the terms of the Facilities.

         E. Renewal Notes. The Borrower agrees to make, execute and deliver to
each Lender (i) a renewal Revolving Note (each, a "Renewal Revolving Note"),
substantially in the form attached hereto as Exhibit "F-1A," (ii) a renewal Term
Note (each, a "Renewal Term Note"), substantially in the form attached hereto as
Exhibit "F-2A," and (iii) a renewal R/E Term Note (each, a "Renewal R/E Term
Note"), substantially in the form attached hereto as Exhibit "F-3A." The Renewal
Revolving Notes, Renewal Term Notes and Renewal R/E Term Notes are hereinafter
collectively referred to as the "Renewal Notes." The Renewal Notes shall be in
renewal, extension and replacement of, but not in satisfaction or as a novation
of, the respective Notes delivered pursuant to the Credit Agreement, and from
and after the Amendment Date, unless the context otherwise requires, all
references to the "Revolving Notes," the "Term Notes" or the "R/E Term Notes"
appearing in the Credit Agreement or any other Loan Documents shall mean and
refer to the Renewal Revolving Notes, the Renewal Term Notes or the Renewal R/E
Term Notes, as applicable.

                                       2
<PAGE>

4. CALCULATION OF BORROWING BASE.

         A. Borrowing Base. Effective as of the Amendment Date, the definition
of term "Borrowing Base" appearing in Section 1.1 of the Credit Agreement is
amended to read in its entirety as follows:

                  "Borrowing Base" means, as of any determination date, an
         amount equal to (i) 80% of the Eligible Accounts Balance on such date,
         plus (ii) 40% of the Eligible Inventory Balance on such date, minus
         (iii) 25% of the aggregate outstanding principal balances of the Term
         Loans as of such date; provided, however, that the amount determined
         under clause (ii) shall be limited to one-fourth (1/4) of the amount
         determined under clause (i).

         B. Form of Borrowing Base Certificate. The form of Borrowing Base
Certificate attached hereto as Exhibit C-1 shall be substituted for Exhibit C to
the Credit Agreement.

5. AMENDMENTS TO CERTAIN COVENANTS. From and after the Amendment Date, the
covenants contained in the Credit Agreement shall be amended and modified as
follows:

         A. Definition of Capital Expenditures. The calculation of Consolidated
Capital Expenditures, both for purposes of Section 6.16 (Capital Expenditures)
and Section 6.24.2 (Debt Service Coverage Ratio), shall include all Capital
Expenditures incurred by the Borrower on or after September 1, 2002, relating to
the Oracle computer systems. Accordingly, the definition of the term
"Consolidated Capital Expenditures" appearing in Section 1.1 of the Credit
Agreement is amended in its entirety, effective from and after the Amendment
Date, to read as follows:

                  "Consolidated Capital Expenditures" means, with reference to
         any period, the Capital Expenditures of the Borrower and its
         Subsidiaries calculated on a consolidated basis for such period;
         provided, however, that the calculation of Consolidated Capital
         Expenditures shall exclude any Capital Expenditures relating to the
         Oracle computer systems incurred prior to September 1, 2002.

         B. Limitation on Capital Expenditures. Section 6.16 of the Credit
Agreement is amended in its entirety to read as follows:

                  6.16 Capital Expenditures. The Borrowers and its Subsidiaries
         will not expend, or become committed to expend, in any fiscal year,
         beginning with the fiscal year ended October 31, 2002, on a
         noncumulative basis, Consolidated Capital Expenditures in excess of
         $1,200,000.

         C. Debt Service Coverage Ratio. The calculation of Consolidated Debt
Service Coverage Ratio, and the determination of the Borrower's compliance with
Section 6.24.2 of the Credit Agreement, are modified as follows:

                                       3
<PAGE>

                  (i) The Borrower agrees to maintain a Consolidated Debt
         Service Coverage Ratio, determined as of October 31, 2002, for the four
         fiscal quarters then ending, of not less than 1.00 to 1.0. Thereafter,
         the Borrower agrees to maintain a Consolidated Debt Service Coverage
         Ratio, determined as of each Quarterly Calculation Date subsequent to
         October 31, 2002, for the then most-recently ended four fiscal
         quarters, of not less than 1.20 to 1.0.

                   (ii) In addition, for the calculations made at October 31,
         2002, January 31, 2003 and April 30, 2003, the Debt Service Coverage
         Ratio of the Borrower will be determined by annualizing the results of
         operations for the period beginning August 1, 2002, and ending on each
         of such determination dates, rather than by using the actual results of
         operations on a trailing 12-month basis. Accordingly, for the Quarterly
         Calculation Dates of October 31, 2002, January 31, 2003 and April 30,
         2003, the first sentence of the definition of "Consolidated Debt
         Service Coverage Ratio" appearing in Section 1.1 of the Credit
         Agreement will be modified to read as follows:

                           "Consolidated Debt Service Coverage Ratio" means, for
                  the Quarterly Calculation Dates of October 31, 2002, January
                  31, 2003 and April 30, 2003, respectively, the ratio of (i)
                  Consolidated EBIDA, calculated on a pro forma annualized
                  basis, for the period beginning August 1, 2002, and ending on
                  such Quarterly Calculation Date, minus unfunded Consolidated
                  Capital Expenditures for the same period, calculated on a pro
                  forma annualized basis, to (ii) Consolidated Interest Expense,
                  calculated on a pro forma annualized basis for the same
                  period, plus the current maturities of long-term Consolidated
                  Funded Indebtedness for the immediately following 12-month
                  period, in each case calculated for the Borrower and its
                  Subsidiaries on a consolidated basis.

         Beginning with the calculation to be made at July 31, 2003, the
         Consolidated Debt Service Coverage Ratio shall be calculated in the
         manner as currently set forth in the Credit Agreement (except that the
         change in the definition of Consolidated Capital Expenditures, as set
         forth in Section 5.A above, shall be permanent).

         D. Net Income Requirement. Effective as of the Amendment Date, a new
Section 6.24.5 is hereby added to the Credit Agreement reading as follows:

                           6.24.5 Consolidated Net Income. The Borrower will not
                  permit the sum of (i) Consolidated Net Income for any fiscal
                  quarter plus (ii) non-cash writedowns of goodwill taken for
                  the same quarter in accordance with the applicable accounting
                  standards under GAAP, to be less than $1.00.

In addition, Section 7.3 of the Credit Agreement is hereby amended to include a
reference to the newly added Section 6.24.5.

                                       4
<PAGE>

         E. Restriction on Dividends. The Borrower acknowledges that it is
prohibited by Section 6.10 of the Credit Agreement from declaring or paying any
dividends or making any distributions on its capital stock (other than dividends
payable in its own capital stock) or redeeming, repurchasing or otherwise
acquiring or retiring any of its capital stock. The Borrower further agrees that
such prohibition will remain in effect, notwithstanding proviso (ii) to Section
6.10 of the Credit Agreement, until further notice from the Lenders.

6. CONDITIONS PRECEDENT. This Amendment shall become effective as of the
Amendment Date, subject to the Borrower's satisfaction of the following
conditions precedent (in addition to the conditions precedent set forth in
Article IV of the Credit Agreement):

         A. Execution of Documents. The Borrower shall have duly and validly
authorized, executed and delivered to the Agent and the Lenders the following
documents, each in form and substance satisfactory to the Lenders:

                  (i)      this Amendment;

                  (ii)     the Renewal Revolving Notes;

                  (iii)    the Renewal Term Notes; and

                  (iv)     the Renewal R/E Term Notes.

         B. Resolutions. The Agent shall have received a copy of the resolutions
of the Board of Directors of the Borrower authorizing the execution and delivery
of this Amendment and the performance by the Borrower of its obligations under
this Amendment, the Credit Agreement (as amended by this Amendment) and the
Renewal Notes.

         C. Consent of Guarantor. The "Consent of Guarantor" appearing after the
Borrower's signature to this Amendment shall have been duly and validly
authorized, executed and delivered to the Lender by the Guarantor.

         D. Accuracy of Representations and Warranties. All representations and
warranties made by the Borrower in the Credit Agreement and the other Loan
Documents shall be true and correct in all material respects as of the Amendment
Date (except to the extent any of such representations and warranties with
respect to the financial condition of the Borrower refer to an earlier specified
date).

         E. No Default. There shall not have occurred any additional Default or
Unmatured Default as of the Amendment Date, and the Borrower shall be current in
payment of all principal, interest and fees due and owing to the Agent or the
Lenders as of the Amendment Date.

7. REPRESENTATIONS AND WARRANTIES. All representations and warranties of
Borrower contained in Article V of the Credit Agreement remain true and correct
(except to the extent any representations and warranties as to the Borrower's
financial condition relate solely to an earlier specified date) and are hereby
remade and restated as the date hereof and shall survive

                                       5
<PAGE>

the execution and delivery of this Amendment. The Borrower further represents
and warrants as follows:

         A. Authority. The Borrower has all requisite power and authority and
has been duly authorized to decrease the amount of the Aggregate Revolving
Credit Commitment and to execute, deliver and perform its obligations under this
Amendment, the Credit Agreement (as amended by this Amendment) and the Renewal
Notes.

         B. Binding Obligations; Enforceability. This Amendment, the Credit
Agreement (as amended by this Amendment) and the Renewal Notes are valid and
legally binding obligations of the Borrower, enforceable in accordance with
their respective terms, except as limited by applicable bankruptcy, insolvency
or other laws affecting the enforcement of creditors' rights generally.

         C. No Conflict; Government Consent. Neither the execution and delivery
by the Borrower of this Amendment and the Renewal Notes, nor the consummation of
the transactions therein contemplated, nor compliance with the provisions
thereof, will violate (i) any law, rule, regulation, order, writ, judgment,
injunction, decree or award binding on the Borrower or any of its Subsidiaries,
or (ii) the Borrower's or any Subsidiary's articles or certificate of
incorporation, partnership agreement, certificate of partnership, articles or
certificate of organization, by-laws, or operating or other management
agreement, as the case may be, or (iii) the provisions of any indenture,
instrument or agreement to which the Borrower or any of its Subsidiaries is a
party or is subject, or by which it, or its Property, is bound, or conflict with
or constitute a default thereunder, or result in, or require, the creation or
imposition of any Lien in, of or on the Property of the Borrower or any of its
Subsidiaries pursuant to the terms of any such indenture, instrument or
agreement. No order, consent, adjudication, approval, license, authorization, or
validation of, or filing, recording or registration with, or exemption by, or
other action in respect of any governmental or public body or authority, or any
subdivision thereof, which has not been obtained by the Borrower or any of its
Subsidiaries, is required to be obtained by the Borrower or any of its
Subsidiaries in connection with the execution and delivery of this Amendment,
the borrowings under the Credit Agreement (as amended hereby), the payment and
performance by the Borrower of the Obligations, or the legality, validity,
binding effect or enforceability of this Amendment, the Credit Agreement (as
amended by this Amendment) or the Renewal Notes.

         D. No Material Adverse Change. Since July 31, 2002 (the date of the
latest financial statements of the Borrower which have been delivered to the
Agent and the Lenders), there has been no adverse change in the business,
Property, prospects, condition (financial or otherwise) or results of operations
of the Borrower and its Subsidiaries which could reasonably be expected to have
a Material Adverse Effect.

8. MISCELLANEOUS.

         A. Effect of Amendment. The terms of this Amendment shall be
incorporated into and form a part of the Credit Agreement. Except as amended,
modified and supplemented by this Amendment, the Credit Agreement shall continue
in full force and effect in accordance with its original stated terms, all of
which are hereby reaffirmed in every respect as of the date hereof. In

                                       6
<PAGE>

the event of any irreconcilable inconsistency between the terms of this
Amendment and the terms of the Credit Agreement, the terms of this Amendment
shall control and govern, and the agreements shall be interpreted so as to carry
out and give full effect to the intent of this Amendment. All references to the
"Credit Agreement" appearing in any of the Loan Documents shall hereafter be
deemed references to the Credit Agreement as amended, modified and supplemented
by this Amendment.

         B. Descriptive Headings. The descriptive headings of the several
sections of this Amendment are inserted for convenience only and shall not be
used in the construction of the content of this Amendment.

         C. Governing Law. This Amendment shall be construed and enforced in
accordance with, and the rights of the parties shall be governed by, the laws of
the State of Oklahoma.

         D. Reimbursement of Expenses. The Borrower agrees to pay the reasonable
fees and out-of-pocket expenses of Crowe & Dunlevy, counsel to the Agent,
incurred in connection with the preparation of this Amendment and the
consummation of the transactions contemplated hereby.

         E. Release by Borrower. In consideration of the waivers and other
agreements of the Lenders and the Agent contained herein, the Borrower, for
itself and its officers, directors, agents, employees, successors and assigns,
hereby releases, acquits and forever discharges each of the Lenders and the
Agent, and each of their respective parent, subsidiary and affiliated companies
and each of their respective officers, directors, agents, employees, successors,
and assigns, and all other persons acting for or on behalf of the Lenders and/or
the Agent, of and from any and all manner of actions, causes of actions, suits,
debts, accounts, conveyances, agreements, damages, claims, demands, liabilities,
costs, and expenses of whatsoever kind or nature, including attorney's fees, in
law or in equity, known or unknown, anticipated or unanticipated and howsoever
arising or accruing, which the Borrower may now have or may claim to have
against the parties released or any of them, including, without limitation,
those arising out of or relating in any way to the Credit Agreement or the
administration of the Facilities thereunder, any other Loan Document or any
other agreement or document relating to the Facilities. It is understood and
agreed by the Borrower that this is a full and final release covering any and
all of the Borrower's actions, claims, debts, judgment, damages, objections,
costs, attorney's fees, demands or liabilities, whether known or unknown,
undisclosed and/or unanticipated, which may have arisen, or may arise from any
act or omission, prior to the date of the execution and delivery of this
Amendment.

         F. No Course of Dealing. This Amendment shall not establish a course of
dealing or be construed as evidence of any willingness or commitment on the part
of the Agent or the Lenders to grant other or future waivers or consents, should
any be requested, or to agree to other or future amendments to or modifications
of the Credit Agreement or the terms and conditions applicable to the
Facilities.

                [REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK.
                      SIGNATURES APPEAR ON FOLLOWING PAGE.]

                                       7
<PAGE>
         IN WITNESS WHEREOF, the Borrower, the Lenders and the Agent have
executed and delivered this Amendment on the day and year first set forth above.

<Table>
<S>                                                           <C>
                                                              XETA TECHNOLOGIES, INC.

                                                              By: /s/ Robert B. Wagner
                                                                  -------------------------------------------------
                                                              Name: Robert B. Wagner
                                                              Title:   Secretary and Chief Financial
                                                                       Officer

Revolving Loan Commitment                                     BANK ONE, OKLAHOMA, N.A.,
from and after Amendment Date:                                Individually and as Agent
$1,100,000

                                                              By: /s/ Tipton J. Burch
                                                                  -------------------------------------------------
                                                              Name:  Tipton J. Burch
                                                              Title:    First Vice President

Revolving Loan Commitment                                     U.S. BANK NATIONAL ASSOCIATION
from and after Amendment Date:
$900,000.00
                                                              By: /s/ Gregory B. Vatterott, Jr.
                                                                  -------------------------------------------------
                                                              Name: Gregory B. Vatterott, Jr.
                                                              Title:   Vice President
</Table>

                                    EXHIBITS

Exhibit B-1       -        Compliance Certificate
Exhibit C-1       -        Borrowing Base Certificate
Exhibit F-1A      -        Form of Renewal Revolving Note
Exhibit F-2A      -        Form of Renewal Term Note
Exhibit F-3A      -        Form of Renewal R/E Term Note

                                       8
<PAGE>
                              CONSENT OF GUARANTOR

         The undersigned hereby (i) acknowledges and consents to the execution
and delivery of the above and foregoing Second Amendment to Credit Agreement,
(ii) confirms that the Subsidiary Guaranty of the undersigned will continue in
full force and effect as security for payment and performance of all of the
"Guaranteed Obligations," as such term is used in the Subsidiary Guaranty, and
(iii) ratifies and reaffirms the Subsidiary Guaranty.

         No inference shall be drawn from the undersigned's execution of this
Consent that consent or approval of the undersigned is required for this or any
future modification or amendment of or supplement to the Credit Agreement or
other Loan Document, or for this or any future increase, decrease, extension or
renewal of the Guaranteed Obligations.

         Capitalized terms used in this Consent and not otherwise defined have
the respective meanings assigned to them in the Credit Agreement referred to in
the above and foregoing Second Amendment to Credit Agreement.

                                   U.S. TECHNOLOGIES SYSTEMS, INC.

                                   By:  /s/ Robert B. Wagner
                                       --------------------------------------
                                   Name:   Robert B. Wagner
                                         ------------------------------------
                                   Title:  Vice President
                                          -----------------------------------

                                       9
<PAGE>

                             RENEWAL REVOLVING NOTE
                                 (Exhibit F-1A)

$                                                           September 10, 2002
 -----------------
                                                               Tulsa, Oklahoma

         XETA Technologies, Inc., an Oklahoma corporation (the "Borrower"),
promises to pay to the order of ________________ (the "Lender"), the aggregate
unpaid principal amount of all Revolving Loans made by the Lender to the
Borrower pursuant to Section 2.1.1 of the Agreement (as hereinafter defined), in
immediately available funds at the main office of Bank One, Oklahoma, N.A.,
Tulsa, Oklahoma, as Agent, together with interest on the unpaid principal amount
hereof at the rates and on the dates set forth in the Agreement. The Borrower
shall pay the principal of and accrued and unpaid interest on the Revolving
Loans in full on the Revolving Credit Facility Termination Date and shall make
such mandatory payments as are required to be made under the terms of Article II
of the Agreement.

         The Lender shall, and is hereby authorized to, record on the schedule
attached hereto, or to otherwise record in accordance with its usual practice,
the date and amount of each Revolving Loan and the date and amount of each
principal payment hereunder.

         This Note is one of the Revolving Notes issued pursuant to, and is
entitled to the benefits of, the Amended and Restated Credit Agreement dated as
of October 31, 2001, as amended by that certain First Amendment to Amended and
Restated Credit Agreement dated effective as of June 1, 2002, and as further
amended by that certain Second Amendment to Amended and Restated Credit
Agreement dated effective as of September 10, 2002 (which, as it may be further
amended or modified and in effect from time to time, is herein called the
"Agreement"), among the Borrower, the lenders party thereto, including the
Lender, and Bank One, Oklahoma, N.A., as Agent. Capitalized terms used herein
and not otherwise defined herein are used with the meanings attributed to them
in the Agreement. Reference is made to the Agreement for a statement of the
terms and conditions governing this Note, including the terms and conditions
under which this Note may be prepaid or its maturity date accelerated.

         This Note is secured pursuant to the Collateral Documents, as more
specifically described in the Agreement, and reference is made thereto for a
statement of the terms and provisions thereof.

         This Note is made, executed and delivered by the Borrower and delivered
to the Lender in renewal, extension and decrease of and replacement for that
certain Revolving Note dated as of October 31, 2001, executed by the Borrower
payable to the order of the Lender in the stated principal amount of
$____________ (the "Prior Note"). All liens and security interests in Property
securing payment of the Prior Note shall continue in full force and effect,
uninterrupted and unabated, as security for payment of this Note.

                                XETA TECHNOLOGIES, INC.,
                                an Oklahoma corporation

                                By:
                                    -------------------------------------------
                                Print Name:  Robert B. Wagner
                                Title:  Secretary and Chief Financial Officer

<PAGE>

                   SCHEDULE OF LOANS AND PAYMENTS OF PRINCIPAL
                                       TO
                RENEWAL REVOLVING NOTE OF XETA TECHNOLOGIES, INC.
                            DATED SEPTEMBER 10, 2002

<Table>
<Caption>
                             Principal                 Maturity                    Principal
                             Amount of                of Interest                   Amount               Unpaid
         Date                  Loan                     Period                       Paid                Balance
----------------------------------------------------------------------------------------------------------------
<S>                         <C>                      <C>                          <C>                   <C>

September 10, 2002

</Table>

<PAGE>

                                RENEWAL TERM NOTE
                                 (Exhibit F-2A)
$                                                          September 10, 2002
 -----------------
                                                              Tulsa, Oklahoma

         XETA Technologies, Inc., an Oklahoma corporation (the "Borrower"),
promises to pay to the order of ____________________ (the "Lender") the
aggregate unpaid principal amount of the Term Loan made by the Lender to the
undersigned pursuant to Section 2.1.2 of the Agreement (as hereinafter defined),
in immediately available funds at the main office of Bank One, Oklahoma, N.A.,
Tulsa, Oklahoma, as Agent, together with interest on the unpaid principal amount
hereof at the rates and on the dates set forth in the Agreement. The undersigned
shall pay the principal of and accrued and unpaid interest on the Term Loan in
full on November 30, 2003, and prior to maturity shall make such payments,
including mandatory prepayments, as are required to be made under the terms of
Article II of the Agreement.

         The Lender shall, and is hereby authorized to, record on the schedule
attached hereto, or to otherwise record in accordance with its usual practice,
the date and amount of the Term Loan and the date and amount of each principal
payment hereunder.

         This Note is one of the Term Notes issued pursuant to, and is entitled
to the benefits of, the Amended and Restated Credit Agreement dated as of
October 31, 2001, as amended by that certain First Amendment to Amended and
Restated Credit Agreement dated effective as of June 1, 2002, and as further
amended by that certain Second Amendment to Amended and Restated Credit
Agreement dated effective as of September 10, 2002 (which, as it may be further
amended or modified and in effect from time to time, is herein called the
"Agreement"), among the Borrower, the lenders party thereto, including the
Lender, and Bank One, Oklahoma, N.A., as Agent. Capitalized terms used herein
and not otherwise defined herein are used with the meanings attributed to them
in the Agreement. Reference is made to the Agreement for a statement of the
terms and conditions governing this Note, including the terms and conditions
under which this Note may be prepaid or its maturity date accelerated.

         This Note is secured pursuant to the Collateral Documents, all as more
specifically described in the Agreement, and reference is made thereto for a
statement of the terms and provisions thereof.

         This Note is made, executed and delivered by the Borrower and delivered
to the Lender in renewal, extension and decrease of and replacement for that
certain Term Note dated as of October 31, 2001, executed by the Borrower payable
to the order of the Lender in the stated principal amount of $____________ (the
"Prior Note"). All liens and security interests in Property securing payment of
the Prior Note shall continue in full force and effect, uninterrupted and
unabated, as security for payment of this Note.

                              XETA TECHNOLOGIES, INC.,
                              an Oklahoma corporation

                              By:
                                  --------------------------------------------
                              Print Name: Robert B. Wagner
                              Title: Secretary and Chief Financial Officer

<PAGE>

                  SCHEDULE OF LOANS AND PAYMENTS OF PRINCIPAL
                                       TO
                  RENEWAL TERM NOTE OF XETA TECHNOLOGIES, INC.
                            DATED SEPTEMBER 10, 2002

<Table>
<Caption>
                             Principal                 Maturity                    Principal
                             Amount of                of Interest                   Amount               Unpaid
         Date                  Loan                     Period                       Paid                Balance
--------------------------------------------------------------------------------------------------------------------

<S>                         <C>                      <C>                          <C>            <C>
September 10, 2002                                                                               $
                                                                                                  -----------------

</Table>

<PAGE>

                              RENEWAL R/E TERM NOTE
                                 (Exhibit F-3A)
                                                              September 10, 2002
$
 -----------------
                                                                 Tulsa, Oklahoma

         XETA Technologies, Inc., an Oklahoma corporation (the "Borrower"),
promises to pay to the order of __________________________ (the "Lender") the
aggregate unpaid principal amount of the R/E Term Loan made by the Lender to the
undersigned pursuant to Section 2.1.3 of the Agreement (as hereinafter defined),
in immediately available funds at the main office of Bank One, Oklahoma, N.A.,
Tulsa, Oklahoma, as Agent, together with interest on the unpaid principal amount
hereof at the rates and on the dates set forth in the Agreement. The undersigned
shall pay the principal of and accrued and unpaid interest on the R/E Term Loan
in full on November 30, 2003, and prior to maturity shall make such payments,
including mandatory prepayments, as are required to be made under the terms of
Article II of the Agreement.

         The Lender shall, and is hereby authorized to, record on the schedule
attached hereto, or to otherwise record in accordance with its usual practice,
the date and amount of the R/E Term Loan and the date and amount of each
principal payment hereunder.

         This Note is one of the R/E Term Notes issued pursuant to, and is
entitled to the benefits of, the Amended and Restated Credit Agreement dated as
of October 31, 2001, as amended by that certain First Amendment to Amended and
Restated Credit Agreement dated effective as of June 1, 2002, and as further
amended by that certain Second Amendment to Amended and Restated Credit
Agreement dated effective as of September 10, 2002 (which, as it may be further
amended or modified and in effect from time to time, is herein called the
"Agreement"), among the Borrower, the lenders party thereto, including the
Lender, and Bank One, Oklahoma, N.A., as Agent. Capitalized terms used herein
and not otherwise defined herein are used with the meanings attributed to them
in the Agreement. Reference is made to the Agreement for a statement of the
terms and conditions governing this Note, including the terms and conditions
under which this Note may be prepaid or its maturity date accelerated.

         This Note is secured pursuant to the Collateral Documents, all as more
specifically described in the Agreement, and reference is made thereto for a
statement of the terms and provisions thereof.

         This Note is made, executed and delivered by the Borrower and delivered
to the Lender in renewal, extension and decrease of and replacement for that
certain R/E Term Note dated as of October 31, 2001, executed by the Borrower
payable to the order of the Lender in the stated principal amount of
$____________ (the "Prior Note"). All liens and security interests in Property
securing payment of the Prior Note shall continue in full force and effect,
uninterrupted and unabated, as security for payment of this Note.

                              XETA TECHNOLOGIES, INC.,
                              an Oklahoma corporation

                              By:
                                  --------------------------------------------
                              Print Name: Robert B. Wagner
                              Title: Secretary and Chief Financial Officer

<PAGE>

                   SCHEDULE OF LOANS AND PAYMENTS OF PRINCIPAL
                                       TO
                RENEWAL R/E TERM NOTE OF XETA TECHNOLOGIES, INC.
                            DATED SEPTEMBER 10, 2002

<Table>
<Caption>
                             Principal                 Maturity                    Principal
                             Amount of                of Interest                   Amount               Unpaid
         Date                  Loan                     Period                       Paid                Balance
--------------------------------------------------------------------------------------------------------------------
<S>                         <C>                      <C>                          <C>           <C>

September 10, 2002                                                                               $
                                                                                                  -----------------
</Table>

<PAGE>

                                   EXHIBIT B-1

                             XETA TECHNOLOGIES, INC.
                    FINANCIAL COVENANT COMPLIANCE CERTIFICATE
                 (Due quarterly within 45 days of quarter end.)
                            As of: __________________

To:      Bank One, Oklahoma, N.A.

The undersigned hereby submits this quarterly compliance certificate pursuant to
the October 31, 2001 Amended and Restated Credit Agreement, amended effective
June 1, 2002 and further amended effective September 10, 2002 (the "Credit
Agreement"); certifies that the Borrower(s) specified in the Credit Agreement
are not in default under the terms and provisions thereof; and further certifies
the following financial covenant compliance calculations required by the Credit
Agreement:

<Table>
<S>                                                  <C>                              <C>
1. MINIMUM CURRENT RATIO
         (Required: Not less than 1.1:1.0)

         a. Current Assets                           $
                                                      ------------
                Divided By
         b. Current Liabilities                      $
                                                      ------------
       Equals Current Ratio (1a. divided by 1b.)                                      1.
                                                                                        ------------

2. MINIMUM CONSOLIDATED NET WORTH
         (Required: Not less than Net Worth of $29,000,000 plus 75% of
         Consolidated Net Income earned in each fiscal quarter beginning with
         quarter ending January 31, 2002 plus 100% of net proceeds from any
         equity offering.)

         a. Consolidated Net Worth Floor                      $29,000,000
                   Plus
         b. 75% of Net Income earned since closing date       $
                                                               ------------
                   Plus
         c. 100% of net proceeds from equity offering         $
                                                               ------------
                        Equals Total Consolidated Net Worth (2a. plus 2b. plus 2c.)   2.
                                                                                        ------------
</Table>

<PAGE>

<Table>
<S>                                        <C>                   <C>

3. MINIMUM DEBT SERVICE COVERAGE RATIO

         (Required: Not less than 1.00:1.0 through 10-31-02 and 1.20:1 thereafter)

         For the calculations made at October 31,2002, January 31, 2003 and
April 30, 2003, the Debt Service Coverage Ratio shall be determined by
annualizing the results of operations for the period beginning August 1, 2002
and ending on the applicable calculation date. For the calculations following
April 30, 2003, the Debt Service Coverage Ratio shall be determined by using the
results for the most recently ended four quarters on a consolidated basis.

         Net Income                         $
                                             -------------
            Plus
         Depreciation and Amortization      $
                                             -------------
            Plus
         Interest Expense                   $
                                             -------------
            Minus
         Unfunded Capital Expenditures      $
                                             -------------
            Minus
         Dividends Paid or Declared         $
                                             -------------
            Equals
         a.Cash Flow Available for Debt Service                $
                                                                -------------

         Current Maturities of Long Term
         Funded Indebtedness                $
                                             -------------
            Plus
         Interest Expense                   $
                                             -------------
            Equals
         b. Total Debt Service Requirements                    $
                                                                -------------

       Debt Service Coverage Ratio (3a. divided by 3b.)                 3.
                                                                          -------------

4.       MAXIMUM LEVERAGE RATIO
         (Required:  Not greater than 2.75:1.0 through 7-31-02 and 2.50:1 thereafter)

         a. Consolidated Funded Indebtedness                   $
                                                                -------------

The following determined as of the most recently ended four quarters on a consolidated basis:
         Net Income                         $
                                             -------------
            Plus
         Interest                           $
                                             -------------
            Plus
         Tax Expense                        $
                                             -------------
            Plus
         Depreciation and Amortization      $
                                             -------------
            Equals
         b.  Consolidated EBITDA                               $
                                                                -------------

   Leverage Ratio (4a. divided by 4b.)                                  4.
                                                                          -------------

5.  MAXIMUM CAPITAL EXPENDITURE CEILING                                 5.
                                                                          -------------
         Calculated at fiscal year end only:
         (Required: Beginning with the fiscal year ended October 31, 2002, not
         greater than $1,200,000 during any fiscal year)
</Table>

                                        2
<PAGE>

<Table>
<S>                                                                             <C>     <C>
6. CONSOLIDATED NET INCOME
         (Required:  Not less than $1.00)

                  a.  Consolidated Net Income for most recent fiscal quarter:
                                                                                        ----------
                  Plus
                  b.  Noncash writedowns of goodwill taken during
                       same quarter                                             +
                                                                                        ----------

                                            Total
                                                                                        ----------
</Table>

Executed and delivered to the Agent this __th day of _____________, 200__.

XETA TECHNOLOGIES, INC.

By:
    ------------------------------
    Robert Wagner, Chief
    Financial Officer

                                        3
<PAGE>

                                   EXHIBIT C-1

                             XETA TECHNOLOGIES, INC.

                           BORROWING BASE CERTIFICATE

Xeta Technologies, Inc. is in compliance with the borrowing base requirements
and certifies that the information shown on the attached Borrowing Base
Calculation worksheet is correct.

I hereby certify that as of __________,20__, the borrowing base totaled
$____________, as shown on the attached Borrowing Base Calculation worksheet.

-----------------------------
Robert Wagner, CFO

Attachments to this Certificate: Borrowing Base Calculation worksheet,
receivable aging report, payable listing, inventory report

E-mail the Borrowing Base workbook to Linda Walker at:
Linda_D_Walker@bankone.com.

                                        4
<PAGE>

BORROWING BASE CALCULATION WORKSHEET

<Table>
<S>                                                      <C>
Borrowing Base Calculation                               XETA Technologies, Inc
DATE:                                                    Type date here
Total Accounts Receivable                                $0.00
Invoices over 90 days old                                $0.00
Contra Accounts                                          $0.00
Affiliate Accounts                                       $0.00
Pre-billed Accounts                                      $0.00
Guaranteed, consigned, or other conditional sales        $0.00
Foreign Accounts                                         $0.00
U.S. Government accounts in excess of $250,000           $0.00
Amounts offset by customer deposits                      $0.00
Other Ineligibles specified by bank                      $0.00
Tainted Accounts                                         $0.00
Excess Concentrations                                    #VALUE!
Total Eligible A/R                                       #VALUE!
Total Eligible A/R X advance rate (80%)                  #VALUE!
Receivable Borrowing Base                                #VALUE!

Total Inventory                                          $0.00
Less:
Obsolete                                                 $0.00
Inventory on consignment                                 $0.00
Inventory held in warehouse 100 by Avaya                 $0.00
Inventory store in a public warehouse with no            $0.00
warehouse agreement in place

Slow-moving inventory (inv. in excess of 1 year's usage) $0.00
Lodging Division's "spare parts" inventory               $0.00
Eligible Inventory                                       $0.00
Eligible Inventory X advance rate (40%)                  $0.00
Inventory Borrowing Base (with cap applied)              #VALUE!

Aggregate balance of outstanding                         #VALUE!
Term Loans  X 25%

Total Borrowing Base (Receivables Borrowing Base +       #VALUE!
Inventory Borrowing Base - 25% of Term Loans)

Revolver Balance Outstanding                             $0.00
</Table>

                                        5
<PAGE>

<Table>
<S>                                                      <C>
Letters of Credit                                        $0.00
Other Adjustments to O/S (specify)                       $0.00

Total  Outstanding                                       $0.00

Available for Advance                                    #VALUE!

Borrowing Base Parameters:
Note Amount                                              $2,000,000.00
Maximum A/R eligibility days (60, 90, 120, etc.)           90 days old
Advance Rate - A/R                                       80.00%
Tainted rate                                             20.00%
Maximum Concentration Level                              25.00%
Advance Rate - Inv                                       40.00%
Maximum Inventory BB as a % of total Receivable          25.00%
Borrowing Base (See cell nt)
</Table>

                                        6

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