Document:

<PAGE>

                                                                   EXHIBIT 10.11

                         AMENDED AND RESTATED EXIM NOTE

$5,000,000.00                                                 September 30, 2002

     FOR VALUE RECEIVED, on or before September 29, 2003 ("Maturity Date") the
undersigned and if more than one, each of them, jointly and severally
("Borrower"), does hereby unconditionally promise to pay to the order of BANK
ONE, NA, successor by merger to BANK ONE, TEXAS, N.A., a national banking
association ("Bank"), at its offices in Dallas County, Texas at 1717 Main
Street, Dallas, Texas 75201, the principal amount of FIVE MILLION AND NO/100
DOLLARS ($5,000,000.00) ("Total Principal Amount"), or such amount less than the
Total Principal Amount which is outstanding from time to time if the total
amount outstanding under this Amended and Restated Exim Note (this "Amended
Note") is less than the Total Principal, Amount, in lawful money of the United
States of America, together with interest on such portion of the Total Principal
Amount which has been drawn until paid at the rates per annum provided below.

     1.   Definitions. For purposes of this Amended Note, unless the context
otherwise requires, the following terms shall have the definitions assigned to
such terms as follows:

     "Adjusted LIBOR Rate" shall mean with respect to each Interest Period, on
any day thereof an amount equal to the sum of (1) 1.25%, plus, (ii) the quotient
of (a) the LIBOR Rate with respect to such Interest Period (the "Index"),
divided by (b) the remainder of 1.0 less the Reserve Requirement in effect on
such day. Each determination by Bank of the Adjusted LIBOR Rate shall, in the
absence of manifest error, be conclusive and binding.

     "Business Day" shall mean any day other than a Saturday, Sunday or any
other day on which national banking associations are authorized to be closed.

     "Consequential Loss" shall mean, with respect to Borrower's payment of all
or any portion of the then-outstanding principal amount of any LIBOR Balance on
a day other than the last day of the Interest Period related thereto, any loss,
cost or expense incurred by Bank in redepositing such principal amount,
including the sum of (i) the interest which, but for such payment, Bank would
have earned in respect of such principal amount so paid, for the remainder of
the Interest Period applicable to such sum, reduced, if Bank is able to
redeposit such principal amount so paid for the balance of such Interest Period,
by the interest earned by Bank as a result of so redepositing such principal
amount plus (ii) any expense or penalty incurred by Bank on redepositing such
principal amount.

     "Contract Rate" shall mean a rate of interest based upon the Adjusted LIBOR
Rate or Prime Rate in effect at any time pursuant to an Interest Notice.

     "Dollars" shall mean lawful currency of the United States of America.

     "Event of Default" shall mean the occurrence of an event of default
specified in the Loan Agreement (as hereinafter defined).

                                        1

<PAGE>

     "Excess Interest Amount" shall mean, on any date, the amount by which (i)
the amount of all interest which would have accrued prior to such date on the
principal of this Amended Note, had the applicable Contract Rate at all times
been in effect without limitation by the Maximum Rate, exceeds (ii) the
aggregate amount of interest accrued on this Amended Note on or prior to such
date.

     "Interest Notice" shall mean the notice given by Borrower to Bank of the
Interest Options selected hereunder. Each Interest Notice shall specify the
Interest Option selected, the amount of the unpaid principal balance of this
Amended Note to bear interest at the rate selected and, if the Adjusted LIBOR
Rate is specified, the length of the applicable Interest Period. An Interest
Notice may be written or oral (if promptly confirmed thereafter in writing) and
Bank is hereby authorized and directed to honor all telephonic Interest Notices
from any person authorized to request advances hereunder.

     "Interest Option" shall have the meaning assigned to such term in paragraph
6 hereof.

     "Interest Payment Date" shall mean (i) in the case of the Prime Rate
Balance, on the last day of December, 2002, and on the last day of each calendar
quarter thereafter until the Maturity Date, and on the Maturity Date, and (ii)
in the case of any LIBOR Balance, on the earlier of (a) the last day of the
corresponding Interest Period with respect to such LIBOR Balance, or (b) the
last day of December, 2002, and on the last day of each calendar quarter
thereafter until the Maturity Date, and on the Maturity Date.

     "Interest Period" shall mean each consecutive one month, two month and
three month period (the first of which shall commence on the date of this
Amended Note) effective as of the first day of each Interest Period and ending
on the last day of each Interest Period, provided that if any Interest Period is
scheduled to end on a date for which there is no numerical equivalent to the
date on which the Interest Period commenced, then it shall end instead on the
last day of such calendar month.

     "LIBOR Balance" shall mean any principal balance of this Amended Note
which, pursuant to an Interest Notice, bears interest at a rate based upon the
Adjusted LIBOR Rate for the Interest Period specified in such Interest Notice.

     "LIBOR Rate" shall mean the offered rate for U.S. Dollar deposits of not
less than $100,000.00 for a period of time equal to each Interest Period as of
11:00 A.M. City of London, England time two London Business Days prior to the
first date of each Interest Period of this Amended Note as shown on the display
designated as "British Bankers Assoc. Interest Settlement Rates" on the Telerate
System ("Telerate"), Page 3750 or Page 3740, or such other page or pages as may
replace such pages on Telerate for the purpose of displaying such rate.
Provided, however, that if such rate is not available on Telerate then such
offered rate shall be otherwise independently determined by Bank from an
alternate, substantially similar independent source available to Bank or shall
be calculated by Bank by a substantially similar methodology as that theretofore
used to determine such offered rate in Telerate. Each change in the rate to be
charged on this Amended Note will become effective without notice on the
commencement of each Interest Period based upon the Index then in effect.

                                        2

<PAGE>

     "Loan Agreement" shall mean that certain Letter Loan Agreement dated
September 30, 2002, by and between Bank and Borrower, as amended from time to
time.

     "Loan Documents" shall mean this Amended Note, the Related Note (as
hereinafter defined), the Loan Agreement, the Exim Loan Documents (as defined in
the Loan Agreement) and all other documents evidencing, securing, governing,
guaranteeing and/or pertaining to this Amended Note.

     "London Business Day" means any day other than a Saturday, Sunday or a day
on which banking institutions are generally authorized or obligated by law or
executive order to close in the City of London, England.

     "Maximum Rate" shall mean, with respect to the holder hereof, the maximum
nonusurious interest rate, if any, that at any time, or from time to time, may
be contracted for, taken, reserved, charged, or received on the indebtedness
evidenced by this Note under the laws which are presently in effect in the
United States and the State of Texas applicable to such holder and such
indebtedness or, to the extent permitted by law, under such applicable laws of
the United States and the State of Texas which may hereafter be in effect and
which allow a higher maximum nonusurious interest rate than applicable laws now
allow. To the extent that Chapter 303 of the Texas Finance Code ("Code"), is
relevant to any holder of this Note for the purposes of determining the Maximum
Rate, each such holder elects to determine such applicable legal rate under the
Act pursuant to the "weekly ceiling," from time to time in effect, as referred
to and defined in Chapter 303 of the Code; subject, however, to the limitations
on such applicable ceiling referred to and defined in Chapter 303 of the Code,
and further subject to any right such holder may have subsequently, under
applicable law, to change the method of determining the Maximum Rate. If no
Maximum Rate is established by applicable law, then the Maximum Rate shall be
equal to eighteen percent (18%).

     "Prime Rate" shall mean the rate established from time to time by Bank as
its prime rate of interest (which may not be the lowest best or most favorable
rate of interest which Bank may charge on loans to its customers).

     "Prime Rate Balance" shall mean that portion of the principal balance of
this Amended Note bearing interest at a rate based upon the Prime Rate.

     "Regulation D" shall mean Regulation D of the Board of Governors of the
Federal Reserve System from time to time in effect and shall `include any
successor or other regulation relating to reserve requirements applicable to
member banks of the Federal Reserve System.

     "Reserve Requirement" shall, on any day, mean that percentage (expressed as
a decimal fraction) which is in effect on such day, as provided by the Board of
Governors of the Federal Reserve System (or any successor governmental body) for
determining the reserve requirements (including without limitation, basic,
supplemental, marginal and emergency reserves) under Regulation D with respect
to "Eurocurrency liabilities" as currently defined in Regulation D, or under any
similar or successor regulation. For purposes of this definition, any LIBOR
Balances hereunder shall be deemed "Eurocurrency liabilities" under Regulation D
without benefit of or

                                        3

<PAGE>

credit for prorations, exemptions or offsets under Regulation D. Bank's
determination of the Reserve Requirement shall be conclusive in the absence of
manifest error.

     2.   Payments of Interest and Principal. Interest on the unpaid principal
balance of this Amended Note shall be due and payable on each Interest Payment
Date as it accrues and the entire unpaid principal balance of this Amended Note,
and all accrued but unpaid interest thereon, shall be due and payable on the
Maturity Date.

     3.   Rates of Interest. The unpaid principal of the Prime Rate Balance
shall bear interest at a rate per annum which shall from day to day be equal to
the lesser of (i) the Prime Rate in effect from day to day, or (ii) the Maximum
Rate. The unpaid principal of each LIBOR Balance shall bear interest at a rate
per annum which shall from day to day be equal to the lesser of (i) the Adjusted
LIBOR Rate for the Interest Period in effect with respect to such LIBOR Balance,
or (ii) the Maximum Rate. Each change in the interest rate applicable to a Prime
Rate Balance shall become effective without prior notice to Borrower
automatically as of the opening of business on the date of such change in the
Prime Rate. Interest on this Amended Note shall be calculated on the basis of
the actual days elapsed in a year consisting of 365 days.

     4.   Interest Recapture. If on each Interest Payment Date or any other date
on which interest payments are required hereunder, Bank does not receive
interest on this Amended Note computed at the Contract Rate because such
Contract Rate exceeds or has exceeded the Maximum Rate, then Borrower shall,
upon the written demand of Bank, pay to Bank in addition to the interest
otherwise required to be paid hereunder, on each Interest Payment Date
thereafter, the Excess Interest Amount (calculated as of such later Interest
Payment Date); provided that in no event shall Borrower be required to pay, for
any Interest Period, interest at a rate exceeding the Maximum Rate effective
during such period.

     5.   Interest on Past Due Amounts. To the extent any interest is not paid
on or before the fifth day after it becomes due and payable, Bank may, at its
option, add such accrued but unpaid interest to the principal of this Amended
Note. Notwithstanding anything herein to the contrary, upon an Event of Default
or at maturity, whether by acceleration or otherwise, all principal of this
Amended Note shall, at the option of Bank, bear interest at the Prime Rate plus
4% (the "Default Rate") until paid; provided, however, at no time shall the
Default Rate exceed the Maximum Rate.

     6.   Interest Option. Subject to the provisions hereof, Borrower shall have
the option (an "Interest Option") of having designated portions of the unpaid
principal balance of this Amended Note bear interest at a rate based upon the
Adjusted LIBOR Rate or Prime Rate as provided in paragraph 3 hereof; provided,
however, that the selection of the Adjusted LIBOR Rate for a particular Interest
Period shall not be for less than $100,000.00 of unpaid principal or an integral
multiple thereof. The Interest Option shall be exercised in the manner provided
below:

          (i)     At Time of Borrowing. Contemporaneously with each request for
     an advance by Borrower under Paragraph 9 herein, Borrower shall give Bank
     an Interest

                                        4

<PAGE>

     Notice indicating the initial Interest Option selected with respect to the
     principal balance of such advance.

          (ii)    At Expiration of Interest Periods. Unless otherwise agreed to
     by Bank, at least two (2) Business Days prior to the termination of any
     Interest Period, Borrower shall give Bank an Interest Notice indicating the
     Interest Option to be applicable to the corresponding LIBOR Balance upon
     the expiration of such Interest Period. If the required Interest Notice
     shall not have been timely received by Bank prior to the expiration of the
     then-relevant Interest Period, Borrower shall be deemed to have selected a
     rate based upon the Prime Rate to be applicable to such LIBOR Balance upon
     the expiration of such Interest Period and to have given Bank notice of
     such election.

          (iii)   Conversion From Prime Rate. During any period in which any
     portion of the principal hereof bears interest at a rate based upon the
     Prime Rate, Borrower shall have the right, on any London Business Day (the
     "Conversion Date"), to convert all or a portion of such principal amount
     from the Prime Rate Balance to a LIBOR Balance by giving Bank an Interest
     Notice of such selection at least two (2) London Business Days prior to
     such Conversion Date, or as otherwise agreed to by Bank.

An Interest Notice may be written or oral and Bank is hereby authorized and
directed to honor all telephonic Interest Notices hereunder. Borrower agrees to
indemnify and hold Bank harmless from any loss or liability incurred by Bank in
connection with honoring any telephonic or other oral Interest Notices. All
written Interest Notices are effective only upon receipt by Bank. Each Interest
Notice shall be irrevocable and binding upon Borrower.

     7.   Special Provisions For LIBOR Pricing.

          a.      Inadequacy of LIBOR Loan Pricing. If Bank determines that, by
reason of circumstances affecting the interbank eurodollar market generally,
deposits in Dollars (in the applicable amounts) are not being offered to United
States financial institutions in the interbank eurodollar market for such
Interest Period, or that the rate at which such Dollar deposits are being
offered will not adequately and fairly reflect the cost to Bank of making or
maintaining a LIBOR Balance for the applicable Interest Period, Bank shall
forthwith give notice thereof to Borrower, whereupon until Bank notifies
Borrower that the circumstances giving rise to such suspension no longer exist,
(i) the right of Borrower to select an Interest Option based upon the LIBOR Rate
shall be suspended, and (ii) Borrower shall be deemed to have converted each
LIBOR Balance to the Prime Rate Balance in accordance with the provisions hereof
on the last day of the then-current Interest Period applicable to such LIBOR
Balance.

          b.      Illegality. If the adoption of any applicable law, rule or
regulation, or any change therein, or any change in the interpretation or
administration thereof by any governmental authority, central bank or comparable
agency charged with the interpretation or administration thereof, or compliance
by Bank with any request or directive (whether or not having the force of law)
of any such authority, central bank or comparable agency shall make it unlawful
or impossible for Bank to make or maintain a LIBOR Balance, Bank shall so notify
Borrower. Upon receipt of such notice, Borrower shall be deemed to have
converted any LIBOR Balance to

                                        5

<PAGE>

the Prime Rate Balance, on either (i) the last day of the then-current Interest
Period applicable to such LIBOR Balance if Bank may lawfully continue to
maintain and fund such LIBOR Balance to such day, or (ii) immediately, if Bank
may not lawfully continue to maintain such LIBOR Balance to such day.

     8.   Extension, Place and Application of Payments. Should the principal of,
or any interest on, this Amended Note become due and payable on any day other
than a Business Day, the maturity thereof shall be extended to the next
succeeding Business Day, and interest shall be payable with respect to such
extension. All payments of principal of, and interest on, this Amended Note
shall be made in lawful money of the United States of America in immediately
available funds. Payments made to Bank by Borrower hereunder shall be applied
first to accrued but unpaid interest and then to outstanding principal.

     9.   Advances. Subject to the terms of this Amended Note and the Loan
Agreement; Borrower may request advances ("Advances") hereunder and make
payments from time to time during the term of this Amended Note, provided that
it is understood and agreed that the aggregate principal amount outstanding from
time to time hereunder shall not exceed the sum of the Total Principal Amount.
The unpaid balance of this Amended Note shall increase and decrease with each
new Advance or payment hereunder as the case may be. This Amended Note shall not
be deemed terminated or cancelled prior to the Maturity Date, although the
entire principal balance hereof may from time to time be paid in full. Subject
to the provisions of this Amended Note and the Loan Agreement, Borrower may
borrow, repay and reborrow hereunder from the date hereof until the Maturity
Date. Subject to the provisions of Paragraph 6 herein, each Advance hereunder
shall be in an amount not less than $100,000.00 or an integral multiple thereof
If any Advance request is received by Bank on or prior to 12:00 p.m. (Dallas,
Texas time) on funds designated to accrue interest at the Prime Rate, Bank shall
make available at Bank's office in Dallas, Texas not later than 2:00 p.m.
(Dallas, Texas time) on the day of such Advance request (or the date specified
in such request), the amount of such request in immediately available funds. If
any Advance request is received by Bank after 12:00 p.m. (Dallas, Texas time) on
funds designated to accrue interest at the Prime Rate, Bank shall make available
at Bank's office in Dallas, Texas not later than 2:00 p.m. (Dallas, Texas time)
on the Business Day after the day of such request (or a later date if specified
in such request), the amount of such request in immediately available funds.
Each request for an Advance on funds designated to accrue interest at the
Adjusted LIBOR Rate must be received by Bank not less than three (3) Business
Days prior to the date upon which the Advance requested is desired by Borrower.
Each request for an Advance hereunder must be accompanied by an Interest Notice
for the funds to be advanced thereunder; provided, however, if an Interest
Notice does not accompany an Advance request, Borrower shall be deemed to have
designated the Prime Rate. Each request for an Advance by Borrower hereunder
shall be irrevocable and binding on Borrower. An Advance request may be written
or oral and Bank is authorized and directed to honor all telephonic requests for
Advances from any person authorized to request Advances hereunder. Borrower
agrees to indemnify and hold Bank harmless from any loss or liability incurred
by Bank in connection with honoring any such telephonic or other oral requests
for Advances. All written Advance requests are effective only upon receipt by
Bank.

                                        6

<PAGE>

     10.  Loan Agreement. This Amended Note is subject to the terms and
provisions of the Loan Agreement, which is incorporated herein by reference for
all purposes. The holder of this Amended Note is entitled to the benefits
provided in the Loan Agreement and the other Loan Documents.

     11.  Prepayments, Consequential Loss. Any prepayment made hereunder shall
be made together with all interest accrued but unpaid on this Amended Note
through the date of such prepayment. Contemporaneously with each prepayment of
principal, Borrower shall give Bank written or oral notice indicating whether
such prepayment is to be applied to the Prime Rate Balance or a particular LIBOR
Balance. If such notice is not timely received by Bank, Borrower shall be deemed
to have selected to prepay the Prime Rate Balance and, if any sums remain after
satisfying all of the Prime Rate Balance, the remaining sums shall be applied to
any LIBOR Balance(s) that Bank determines in its sole discretion. Borrower
agrees to indemnify and hold Bank harmless from any loss or liability incurred
by Bank in connection with honoring telephonic or other oral notices indicating
how a prepayment is to be applied. If Borrower makes any such prepayment other
than on the last day of an Interest Period, Borrower shall pay all accrued
interest on the principal amount prepaid .with such prepayment and, on demand,
shall reimburse Bank and hold Bank harmless from all losses and expenses
incurred by Bank as a result of such prepayment including, without limitation,
any losses and expenses arising from the liquidation or reemployment of deposits
acquired to fund or maintain the principal amount prepaid. Such reimbursement
shall be calculated as though Bank funded the principal amount prepaid through
the purchase of U.S. Dollar deposits in the London, England interbank market
having a maturity corresponding to such Interest Period and bearing an interest
rate equal to the LIBOR Rate for such Interest Period, whether in fact that is
the case or not. Bank's determination of the amount of such reimbursement shall
be conclusive in the absence of manifest error.

     12.  Additional Costs. Borrower agrees to pay to Bank all Additional Costs
within ten (10) days of receipt by Borrower from Bank of a statement setting
forth the amount or amounts due and the basis for the determination from time to
time of such amount or amounts, which statement .shall be conclusive and binding
upon Borrower absent manifest error. Failure on the part of Bank to demand
compensation for any Additional Costs in any Interest Period shall not
constitute a waiver of Banks right to demand compensation for any Additional
Costs incurred during any such Interest Period or in any other subsequent or
prior Interest Period. The term "Additional Costs" shall mean such additional
amount or amounts as Bank shall reasonably determine will compensate Bank for
actual costs incurred by Bank in maintaining LIBOR Rates on the LIBOR Balances
or any portion thereof as a result of any change, after the date of this Amended
Note, in applicable law, rule or regulation or in the interpretation or
administration thereof by, or the compliance by Bank with any request or
directive from, any domestic or foreign governmental authority charged with the
interpretation or administration thereof (whether or not having the force of
law) or by any domestic or foreign court changing the basis of taxation of
payments to Bank of the LIBOR Balances or interest on the LIBOR Balances or any
portion thereof at an Adjusted LIBOR Rate or any other fees or amounts payable
under this Amended Note or the Loan Agreement (other than taxes imposed on all
or any portion of the overall net income of Bank by the State of Texas or the
Federal government), or imposing, modifying or applying any reserve, special
deposit or similar requirement against assets of,

                                        7

<PAGE>

deposits with or for the account of, credit extended by, or any other
acquisition of funds for loans by Bank, or imposing on Bank, as the case may be,
or on the London interbank market any other condition affecting this Amended
Note, the Loan Agreement or the LIBOR Balances so as to increase the cost of
Bank making or maintaining Adjustable LIBOR Rates with respect to the LIBOR
Balances or any portion thereof or to reduce the amount of any sum received or
receivable by Bank under this Amended Note or the Loan Agreement (whether of
principal, interest or otherwise), by an amount deemed by Bank in good faith to
be material, but without duplication for Reserve Requirement.. Bank agrees that
it will not demand compensation for any Additional Costs from Borrower unless it
is seeking similar compensation from its other customers similarly situated.

     13.  Notices. Except as otherwise specified herein, all notices and
requests required or permitted hereunder shall be in writing and shall be deemed
to have been given when personally delivered or, if mailed, two Business Days
after deposited in a regularly maintained receptacle for the United States
Postal Service, postage prepaid, registered or certified, return receipt
requested, addressed to Borrower or Bank at the following respective addresses
or such other address as such party may from time to time designate by written
notice to the other: Borrower: 3000 Research Drive, Richardson, Texas 75082,
Attention: Jean Nelson, Bank: 1717 Main Street, Dallas, Texas 75201, Attention:
Frederick A. Points.

     14.  Legal Fees. If this Amended Note is placed in the hands of any
attorney for collection, or if it is collected through any legal proceeding at
law or in equity or in bankruptcy, receivership or other court proceedings,
Borrower agrees to pay all costs of collection including, but not limited to,
court costs and reasonable attorneys' fees.

     15.  Waivers. Borrower and each surety, endorser, guarantor and any other
party ever liable for payment of any sums of money payable on this Amended Note,
jointly and severally waive presentment and demand for payment, protest, notice
of protest, intention to accelerate, acceleration and non-payment, or other
notice of default, and agree that their liability under this Amended Note shall
not be affected by any renewal or extension in the time of payment hereof, or in
any indulgences, or by any release or change in any security for the payment of
this Amended Note, and hereby consent to any and all renewals, extensions,
indulgences, releases or changes, regardless of the number of such renewals,
extensions, indulgences, releases or changes; provided, however, this Amended
Note ma not be amended or modified except by a written instrument signed by the
Borrower and the holder hereof.

     No waiver by Bank of any of its rights or remedies hereunder or under any
other document evidencing or securing this Amended Note or otherwise shall be
considered a waiver of any other subsequent right or remedy of Bank; no delay or
omission in the exercise or enforcement by Bank of any rights or remedies shall
ever be construed as a waiver of any right or remedy of Bank; and no exercise or
enforcement of any such rights or remedies shall ever be held to exhaust any
right or remedy of Bank.

     16.  Remedies. Subject to any notice and cure period, upon the occurrence
of any Event of Default, the holder hereof may, at its option, (i) declare the
entire unpaid balance of principal and accrued but unpaid interest on this
Amended Note to be immediately due and

                                        8

<PAGE>

payable, (ii) refuse to advance any additional amounts under this Amended Note,
(iii) foreclose all liens securing payment hereof, (iv) pursue any and all other
rights, remedies and recourses available to the holder hereof, including but not
limited to, any such rights, remedies or recourses under the Loan Documents, at
law or in equity, or (v) pursue any combination of the foregoing.

     17.  Spreading. Any provision herein, or in any document securing, this
Amended Note, or any other document executed or delivered in connection
herewith, or in any other agreement or commitment, whether written or oral,
expressed or implied, to the contrary notwithstanding, neither Bank nor any
holder hereof shall in any event be entitled to receive or collect, nor shall or
may amounts received hereunder be credited, so that Bank or any holder hereof
shall be paid, as interest, a sum greater than the maximum amount permitted by
applicable law to be charged to the person, partnership, firm or corporation
primarily obligated to pay this Amended Note at the time in question. If any
construction of this Amended Note or any document securing this Amended Note, or
any and all other papers, agreements or commitments, indicate a different right
given to Bank or any holder hereof to ask for, demand or receive any larger sum
as interest, such is a mistake in calculation or wording which this clause shall
override and control, it being the intention of the parties that this Amended
Note, and all other instruments securing the payment of this Amended Note or
executed or delivered in connection herewith shall in all things comply with the
applicable law and proper adjustments shall automatically be made accordingly.
In the event that Bank or any holder hereof ever receives, collects or applies
as interest, any sum in excess of the Maximum Rate, if any, such excess amount
shall be applied to the reduction of the unpaid principal balance of this
Amended Note, and if this Amended Note is paid in full, any remaining excess
shall be paid to Borrower. In determining whether or not the interest paid or
payable, under any specific contingency, exceeds the Maximum Rate, if any,
Borrower and Bank or any holder hereof shall, to the maximum extent permitted
under applicable law: (a) characterize any nonprincipal payment as an expense or
fee rather than as interest, (b) exclude voluntary prepayments and the effects
thereof, (c) "spread" the total amount of interest throughout the entire term of
this Amended Note; provided that if this Amended Note is paid and performed in
full prior to the end of the full contemplated term hereof, and if the interest
received for the actual period of existence thereof exceeds the Maximum Rate, if
any, Bank or any holder hereof shall refund to Borrower the amount of such
excess, or credit the amount of such excess against the aggregate unpaid
principal balance of all advances made by the Bank or any holder hereof under
this Amended Note at the time in question.

     18.  Choice of Law. This Amended Note is being executed and delivered, and
is intended to be performed in the State of Texas. Except to the extent that the
laws of the United States may apply to the terms hereof, the substantive laws of
the State of Texas shall govern the validity, construction, enforcement and
interpretation of this Amended Note. In the event of a dispute involving this
Amended Note or any other instruments executed in connection herewith, the
undersigned irrevocably agrees that venue for such dispute shall he in any court
of competent jurisdiction in Dallas County, Texas.

     19.  Renewal. This Amended Note is given in renewal, extension and increase
of that certain Promissory Note dated September 14, 2001 in the stated principal
amount of $4,500,000.00 executed by Borrower and payable to the order of Bank.
This Amended Note is

                                        9

<PAGE>

given in conjunction with that certain Revolving Promissory Note dated of even
date herewith executed and delivered by Borrower and payable to the order of
Bank in the stated principal amount of $12,500,000.00 ("Related Note").

                                               AMX CORPORATION, a Texas
                                               corporation, formerly known as
                                               PANJA INC.

                                               By: /s/ Jean M. Nelson
                                                  ------------------------------
                                               Name: Jean M. Nelson
                                                    ----------------------------
                                               Title: VP & CFO
                                                     ---------------------------

                                       10<PAGE>

                                                                   EXHIBIT 10.12

                                                                       EXHIBIT B

                     EXPORT-IMPORT BANK OF THE UNITED STATES
                        WORKING CAPITAL GUARANTEE PROGRAM

                               BORROWER AGREEMENT

     THIS BORROWER AGREEMENT (this "Agreement") is made and entered into by the
entity identified as Borrower on the signature page hereof ("Borrower") in favor
of the Export-Import Bank of the United States ("Ex-Im Bank") and the
institution identified as Lender on the signature page hereof ("Lender").

                                    RECITALS

     Borrower has requested that Lender establish a Loan Facility in favor of
Borrower for the purposes of providing Borrower with pre-export working capital
to finance the manufacture, production or purchase and subsequent export sale of
Items.
     It is a condition to the establishment of such Loan Facility that Ex-Im
Bank guarantee the payment of ninety percent (90%) of certain credit
accommodations subject to the terms and conditions of a Master Guarantee
Agreement, the Loan Authorization Agreement, and to the extent applicable, the
Delegated Authority Letter Agreement.
     Borrower is executing this Agreement for the benefit of Lender and Ex-Im
Bank in consideration for and as a condition to Lender's establishing the Loan
Facility and Ex-Im Bank's agreement to guarantee such Loan Facility pursuant to
the Master Guarantee Agreement.

     NOW, THEREFORE, Borrower hereby agrees as follows:

                                    ARTICLE I
                                   DEFINITIONS

1.01 Definition of Terms. As used in this Agreement, including the Recitals to
this Agreement and the Loan Authorization Agreement, the following terms shall
have the following meanings:

     "Accounts Receivable" shall mean all of Borrower's now owned or hereafter
acquired (a) "accounts" (as such term is defined in the UCC), other receivables,
book debts and other forms of obligations, whether arising out of goods sold or
services rendered or from any other transaction; (b) rights in, to and under all
purchase orders or receipts for goods or services; (c) rights to any goods
represented or purported to be represented by any of the foregoing (including
unpaid sellers' rights of rescission, replevin, reclamation and stoppage in
transit and rights to returned, reclaimed or repossessed goods); (d) moneys due
or to become due to such Borrower under all purchase orders and contracts for
the sale of goods or the performance of services or both by Borrower (whether or
not yet earned by performance on the part of Borrower), including the proceeds
of the foregoing; (e) any notes, drafts, letters of credit, insurance proceeds
or other instruments, documents and writings evidencing or supporting the
foregoing; and (f) all collateral

<PAGE>

security and guarantees of any kind given by any other Person with respect to
any of the foregoing.

          "Advance Rate" shall mean the rate specified in Section 5(C) of the
Loan Authorization Agreement for each category of Collateral.

          "Business Day" shall mean any day on which the Federal Reserve Bank of
New York is open for business.

          "Buyer" shall mean a Person that has entered into one or more Export
Orders with Borrower.

          "Collateral" shall mean all property and interest in property in or
upon which Lender has been granted a Lien as security for the payment of all the
Loan Facility Obligations including the Collateral identified in Section 6 of
the Loan Authorization Agreement and all products and proceeds (cash and
non-cash) thereof.

          "Commercial Letters of Credit" shall mean those letters of credit
subject to the UCP payable in Dollars and issued or caused to be issued by
Lender on behalf of Borrower under a Loan Facility for the benefit of a
supplier(s) of Borrower in connection with Borrower's purchase of goods or
services from the supplier in support of the export of the Items.

          "Country Limitation Schedule" shall mean the schedule published from
time to time by Ex-Im Bank and provided to Borrower by Lender which sets forth
on a country by country basis whether and under what conditions Ex-Im Bank will
provide coverage for the financing of export transactions to countries listed
therein.

          "Credit Accommodation Amount" shall mean, the sum of (a) the aggregate
outstanding amount of Disbursements and (b) the aggregate outstanding face
amount of Letter of Credit Obligations.

          "Credit Accommodations" shall mean, collectively, Disbursements and
Letter of Credit Obligations.

          "Debarment Regulations" shall mean, collectively, (a) the
Governmentwide Debarment and Suspension (Nonprocurement) regulations (Common
Rule), 53 Fed. Reg. 19204 (May 26, 1988), (b) Subpart 9.4 (Debarment,
Suspension, and Ineligibility) of the Federal Acquisition Regulations, 48 C.F.R.
9.400-9.409 and (c) the revised Governmentwide Debarment and Suspension
(Nonprocurement) regulations (Common Rule), 60 Fed. Reg. 33037 (June 26, 1995).

          "Delegated Authority Letter Agreement" shall mean the Delegated
Authority Letter Agreement, if any, between Ex-Im Bank and Lender.

                                        2

<PAGE>

          "Disbursement" shall mean, collectively, (a) an advance of a working
capital loan from Lender to Borrower under the Loan Facility, and (b) an advance
to fund a drawing under a Letter of Credit issued or caused to be issued by
Lender for the account of Borrower under the Loan Facility.

          "Dollars" or "$" shall mean the lawful currency of the United States.

          "Effective Date" shall mean the date on which (a) the Loan Documents
are executed by Lender and Borrower or the date, if later, on which agreements
are executed by Lender and Borrower adding the Loan Facility to an existing
working capital loan arrangement between Lender and Borrower and (b) all of the
conditions to the making of the initial Credit Accommodations under the Loan
Documents or any amendments thereto have been satisfied.

          "Eligible Export-Related Accounts Receivable" shall mean an
Export-Related Account Receivable which is acceptable to Lender and which is
deemed to be eligible pursuant to the Loan Documents, but in no event shall
Eligible Export-Related Accounts Receivable include any Account Receivable:

          (a)  that does not arise from the sale of Items in the ordinary course
of Borrower's business;

          (b)  that is not subject to a valid, perfected first priority Lien in
favor of Lender;

          (c)  as to which any covenant, representation or warranty contained in
the Loan Documents with respect to such Account Receivable has been breached;

          (d)  that is not owned by Borrower or is subject to any right, claim
or interest of another Person other than the Lien in favor of Lender;

          (e)  with respect to which an invoice has not been sent;

          (f)  that arises from the sale of defense articles or defense
services;

          (g)  that is due and payable from a Buyer located in a country with
which Ex-Im Bank is prohibited from doing business as designated in the Country
Limitation Schedule;

          (h)  that does not comply with the requirements of the Country
Limitation Schedule;

          (i)  that is due and payable more than one hundred eighty (180) days
from the date of the invoice;

          (j)  that is not paid within sixty (60) calendar days from its
original due date, unless it is insured through Ex-Im Bank export credit
insurance for comprehensive commercial

                                        3

<PAGE>

and political risk, or through Ex-Im Bank approved private insurers for
comparable coverage, in which case it is not paid within ninety (90) calendar
days from its due date;

          (k)  that arises from a sale of goods to or performance of services
for an employee of Borrower, a stockholder of Borrower, a subsidiary of
Borrower, a Person with a controlling interest in Borrower or a Person which
shares common controlling ownership with Borrower;

          (l)  that is backed by a letter of credit unless the Items covered by
the subject letter of credit have been shipped;

          (m)  that Lender or Ex-Im Bank, in its reasonable judgment, deems
uncollectible for any reason;

          (n)  that is due and payable in a currency other than Dollars, except
as may be approved in writing by Ex-Im Bank;

          (o)  that is due and payable from a military Buyer, except as may be
approved in writing by Ex-Im Bank;

          (p)  that does not comply with the terms of sale set forth in Section
7 of the Loan Authorization Agreement;

          (q)  that is due and payable from a Buyer who (i) applies for,
suffers, or consents to the appointment of, or the taking of possession by, a
receiver, custodian, trustee or liquidator of itself or of all or a substantial
part of its property or calls a meeting of its creditors, (ii) admits in writing
its inability, or is generally unable, to pay its debts as they become due or
ceases operations of its present business, (iii) makes a general assignment for
the benefit of creditors, (iv) commences a voluntary case under any state or
federal bankruptcy laws (as now or hereafter in effect), (v) is adjudicated as
bankrupt or insolvent, (vi) files a petition seeking to take advantage of any
other law providing for the relief of debtors, (vii) acquiesces to, or fails to
have dismissed, any petition which is filed against it in any involuntary case
under such bankruptcy laws, or (viii) takes any action for the purpose of
effecting any of the foregoing;

          (r)  that arises from a bill-and-hold, guaranteed sale,
sale-and-return, sale on approval, consignment or any other repurchase or return
basis or is evidenced by chattel paper;

          (s)  for which the Items giving rise to such Account Receivable have
not been shipped and delivered to and accepted by the Buyer or the services
giving rise to such Account Receivable have not been performed by Borrower and
accepted by the Buyer or the Account Receivable otherwise does not represent a
final sale;

          (t)  that is subject to any offset, deduction, defense, dispute, or
counterclaim or the Buyer is also a creditor or supplier of Borrower or the
Account Receivable is contingent in any respect or for any reason;

                                        4

<PAGE>

          (u)  for which Borrower has made any agreement with the Buyer for any
deduction therefrom, except for discounts or allowances made in the ordinary
course of business for prompt payment, all of which discounts or allowances are
reflected in the calculation of the face value of each respective invoice
related thereto; or

          (v)  for which any of the Items giving rise to such Account Receivable
have been returned, rejected or repossessed.

          "Eligible Export-Related Inventory" shall mean Export-Related
Inventory which is acceptable to Lender and which is deemed to be eligible
pursuant to the Loan Documents, but in no event shall Eligible Export-Related
Inventory include any Inventory:

          (a)  that is not subject to a valid, perfected first priority Lien in
favor of Lender;

          (b)  that is located at an address that has not been disclosed to
Lender in writing;

          (c)  that is placed by Borrower on consignment or held by Borrower on
consignment from another Person;

          (d)  that is in the possession of a processor or bailee, or located on
premises leased or subleased to Borrower, or on premises subject to a mortgage
in favor of a Person other than Lender, unless such processor or bailee or
mortgagee or the lessor or sublessor of such premises, as the case may be, has
executed and delivered all documentation which Lender shall require to evidence
the subordination or other limitation or extinguishment of such Person's rights
with respect to such Inventory and Lender's right to gain access thereto;

          (e)  that is produced in violation of the Fair Labor Standards Act or
subject to the "hot goods" provisions contained in 29 U.S.C.Section215 or any
successor statute or section;

          (f)  as to which any covenant, representation or warranty with respect
to such Inventory contained in the Loan Documents has been breached;

          (g)  that is not located in the United States;

          (h)  that is demonstration Inventory;

          (i)  that consists of proprietary software (i.e. software designed
solely for Borrower's internal use and not intended for resale);

          (j)  that is damaged, obsolete, returned, defective, recalled or unfit
for further processing;

                                        5

<PAGE>

          (k)  that has been previously exported from the United States;

          (l)  that constitutes defense articles or defense services;

          (m)  that is to be incorporated into Items destined for shipment to a
country as to which Ex-Im Bank is prohibited from doing business as designated
in the Country Limitation Schedule;

          (n)  that is to be incorporated into Items destined for shipment to a
Buyer located in a country in which Ex-Im Bank coverage is not available for
commercial reasons as designated in the Country Limitation Schedule, unless and
only to the extent that such Items are to be sold to such country on terms of a
letter of credit confirmed by a bank acceptable to Ex-Im Bank; or

          (o)  that is to be incorporated into Items whose sale would result in
an Account Receivable which would not be an Eligible Export-Related Account
Receivable.

          "Eligible Person" shall mean a sole proprietorship, partnership,
limited liability partnership, corporation or limited liability company which
(a) is domiciled, organized, or formed, as the case may be, in the United
States; (b) is in good standing in the state of its formation or otherwise
authorized to conduct business in the United States; (c) is not currently
suspended or debarred from doing business with the United States government or
any instrumentality, division, agency or department thereof; (d) exports or
plans to export Items; (e) operates and has operated as a going concern for at
least one (1) year; (f) has a positive tangible net worth determined in
accordance with GAAP; and (g) has revenue generating operations relating to its
core business activities for at least one year.

          "ERISA" shall mean the Employee Retirement Income Security Act of 1974
and the rules and regulations promulgated thereunder.

          "Export Order" shall mean a written export order or contract for the
purchase by the Buyer from Borrower of any of the Items.

          "Export-Related Accounts Receivable" shall mean those Accounts
Receivable arising from the sale of Items which are due and payable to Borrower
in the United States.

          "Export-Related Accounts Receivable Value" shall mean, at the date of
determination thereof, the aggregate face amount of Eligible Export-Related
Accounts Receivable less taxes, discounts, credits, allowances and Retainages,
except to the extent otherwise permitted by Ex-Im Bank in writing.

          "Export-Related Borrowing Base" shall mean, at the date of
determination thereof, the sum of (a) the Export-Related Inventory Value
multiplied by the Advance Rate applicable to Export-Related Inventory set forth
in Section 5(C)(1) of the Loan Authorization Agreement, (b) the Export-Related
Accounts Receivable Value multiplied by the Advance Rate applicable to

                                        6

<PAGE>

Export-Related Accounts Receivable set forth in Section 5(C)(2) of the Loan
Authorization Agreement, (c) if permitted by Ex-Im Bank in writing, the
Retainage Value multiplied by the Retainage Advance Rate set forth in Section
5(C)(3) of the Loan Authorization Agreement and (d) the Other Assets Value
multiplied by the Advance Rate applicable to Other Assets set forth in Section
5(C)(4) of the Loan Authorization Agreement.

          "Export-Related Borrowing Base Certificate" shall mean a certificate
in the form provided or approved by Lender, executed by Borrower and delivered
to Lender pursuant to the Loan Documents detailing the Export-Related Borrowing
Base supporting the Credit Accommodations which reflects, to the extent included
in the Export-Related Borrowing Base, Export-Related Accounts Receivable,
Eligible Export-Related Accounts Receivable, Export-Related Inventory and
Eligible Export-Related Inventory balances that have been reconciled with
Borrower's general ledger, Accounts Receivable aging report and Inventory
schedule.

          "Export-Related General Intangibles" shall mean those General
Intangibles necessary or desirable to or for the disposition of Export-Related
Inventory.

          "Export-Related Inventory" shall mean the Inventory of Borrower
located in the United States that has been purchased, manufactured or otherwise
acquired by Borrower for resale pursuant to Export Orders.

          "Export-Related Inventory Value" shall mean, at the date of
determination thereof, the lower of cost or market value of Eligible
Export-Related Inventory of Borrower as determined in accordance with GAAP.

          "Final Disbursement Date" shall mean, unless subject to an extension
of such date agreed to by Ex-Im Bank, the last date on which Lender may make a
Disbursement set forth in Section 10 of the Loan Authorization Agreement or, if
such date is not a Business Day, the next succeeding Business Day; provided,
however, to the extent that Lender has not received cash collateral or an
indemnity with respect to Letter of Credit Obligations outstanding on the Final
Disbursement Date, the Final Disbursement Date with respect to an advance to
fund a drawing under a Letter of Credit shall be no later than thirty (30)
Business Days after the expiry date of the Letter of Credit related thereto.

          "GAAP" shall mean the generally accepted accounting principles issued
by the American Institute of Certified Public Accountants as in effect from time
to time.

          "General Intangibles" shall mean all intellectual property and other
"general intangibles" (as such term is defined in the UCC) necessary or
desirable to or for the disposition of Inventory.

          "Guarantor" shall mean each Person, if any, identified in Section 3 of
the Loan Authorization Agreement who shall guarantee (jointly and severally if
more than one) the payment and performance of all or a portion of the Loan
Facility Obligations.

                                        7

<PAGE>

          "Guaranty Agreement" shall mean a valid and enforceable agreement of
guaranty executed by each Guarantor in favor of Lender.

          "Inventory" shall mean all "inventory" (as such term is defined in the
UCC), now or hereafter owned or acquired by Borrower, wherever located,
including all inventory, merchandise, goods and other personal property which
are held by or on behalf of Borrower for sale or lease or are furnished or are
to be furnished under a contract of service or which constitute raw materials,
work in process or materials used or consumed or to be used or consumed in
Borrower's business or in the processing, production, packaging, promotion,
delivery or shipping of the same, including other supplies.

          "ISP" shall mean the International Standby Practices-ISP98,
International Chamber of Commerce Publication No. 590 and any amendments and
revisions thereof.

          "Issuing Bank" shall mean the bank that issues a Letter of Credit,
which bank is Lender itself or a bank that Lender has caused to issue a Letter
of Credit by way of guarantee.

          "Items" shall mean the finished goods or services which are intended
for export from the United States, as specified in Section 4(A) of the Loan
Authorization Agreement.

          "Letter of Credit" shall mean a Commercial Letter of Credit or a
Standby Letter of Credit.

          "Letter of Credit Obligations" shall mean all outstanding obligations
incurred by Lender, whether direct or indirect, contingent or otherwise, due or
not due, in connection with the issuance or guarantee by Lender or the Issuing
Bank of Letters of Credit.

          "Lien" shall mean any mortgage, security deed or deed of trust,
pledge, hypothecation, assignment, deposit arrangement, lien, charge, claim,
security interest, security title, easement or encumbrance, or preference,
priority or other security agreement or preferential arrangement of any kind or
nature whatsoever (including any lease or title retention agreement, any
financing lease having substantially the same economic effect as any of the
foregoing, and the filing of, or agreement to give, any financing statement
perfecting a security interest under the UCC or comparable law of any
jurisdiction) by which property is encumbered or otherwise charged.

          "Loan Agreement" shall mean a valid and enforceable agreement between
Lender and Borrower setting forth the terms and conditions of the Loan Facility.

          "Loan Authorization Agreement" shall mean the Loan Authorization
Agreement entered into between Lender and Ex-Im Bank or the Loan Authorization
Notice setting forth certain terms and conditions of the Loan Facility, a copy
of which is attached hereto as Annex A.

                                        8

<PAGE>

          "Loan Authorization Notice" shall mean the Loan Authorization Notice
executed by Lender and delivered to Ex-Im Bank in accordance with the Delegated
Authority Letter Agreement setting forth the terms and conditions of each Loan
Facility.

          "Loan Documents" shall mean the Loan Authorization Agreement, the Loan
Agreement, this Agreement, each promissory note (if applicable), each Guaranty
Agreement, and all other instruments, agreements and documents now or hereafter
executed by Borrower or any Guarantor evidencing, securing, guaranteeing or
otherwise relating to the Loan Facility or any Credit Accommodations made
thereunder.

          "Loan Facility" shall mean the Revolving Loan Facility, the
Transaction Specific Loan Facility or the Transaction Specific Revolving Loan
Facility established by Lender in favor of Borrower under the Loan Documents.

          "Loan Facility Obligations" shall mean all loans, advances, debts,
expenses, fees, liabilities, and obligations for the performance of covenants,
tasks or duties or for payment of monetary amounts (whether or not such
performance is then required or contingent, or amounts are liquidated or
determinable) owing by Borrower to Lender, of any kind or nature, present or
future, arising in connection with the Loan Facility.

          "Loan Facility Term" shall mean the number of months from the
Effective Date to the Final Disbursement Date as originally set forth in the
Loan Authorization Agreement.

          "Master Guarantee Agreement" shall mean the Master Guarantee Agreement
between Ex-Im Bank and Lender, as amended, modified, supplemented and restated
from time to time.

          "Material Adverse Effect" shall mean a material adverse effect on (a)
the business, assets, operations, prospects or financial or other condition of
Borrower or any Guarantor, (b) Borrower's ability to pay or perform the Loan
Facility Obligations in accordance with the terms thereof, (c) the Collateral or
Lender's Liens on the Collateral or the priority of such Lien or (d) Lender's
rights and remedies under the Loan Documents.

          "Maximum Amount" shall mean the maximum principal balance of Credit
Accommodations that may be outstanding at any time under the Loan Facility
specified in Section 5(A) of the Loan Authorization Agreement.

          "Other Assets" shall mean the Collateral, if any, described in Section
5(C)(4) of the Loan Authorization Agreement.

          "Other Assets Value" shall mean, at the date of determination thereof,
the value of the Other Assets as determined in accordance with GAAP.

          "Permitted Liens" shall mean (a) Liens for taxes, assessments or other
governmental charges or levies not delinquent, or, being contested in good faith
and by

                                        9

<PAGE>

appropriate proceedings and with respect to which proper reserves have been
taken by Borrower; provided, that, the Lien shall have no effect on the priority
of the Liens in favor of Lender or the value of the assets in which Lender has
such a Lien and a stay of enforcement of any such Lien shall be in effect; (b)
deposits or pledges securing obligations under worker's compensation,
unemployment insurance, social security or public liability laws or similar
legislation; (c) deposits or pledges securing bids, tenders, contracts (other
than contracts for the payment of money), leases, statutory obligations, surety
and appeal bonds and other obligations of like nature arising in the ordinary
course of Borrower's business; (d) judgment Liens that have been stayed or
bonded; (e) mechanics', workers', materialmen's or other like Liens arising in
the ordinary course of Borrower's business with respect to obligations which are
not due; (f) Liens placed upon fixed assets hereafter acquired to secure a
portion of the purchase price thereof, provided, that, any such Lien shall not
encumber any other property of Borrower; (g) security interests being terminated
concurrently with the execution of the Loan Documents; (h) Liens in favor of
Lender securing the Loan Facility Obligations; and (i) Liens disclosed in
Section 6(D) of the Loan Authorization Agreement.

          "Person" shall mean any individual, sole proprietorship, partnership,
limited liability partnership, joint venture, trust, unincorporated
organization, association, corporation, limited liability company, institution,
public benefit corporation, entity or government (whether national, federal,
provincial, state, county, city, municipal or otherwise, including any
instrumentality, division, agency, body or department thereof), and shall
include such Person's successors and assigns.

          "Principals" shall mean any officer, director, owner, partner, key
employee, or other Person with primary management or supervisory
responsibilities with respect to Borrower or any other Person (whether or not an
employee) who has critical influence on or substantive control over the
transactions covered by this Agreement.

          "Retainage" shall mean that portion of the purchase price of an Export
Order that a Buyer is not obligated to pay until the end of a specified period
of time following the satisfactory performance under such Export Order.

          "Retainage Accounts Receivable" shall mean those portions of Eligible
Export-Related Accounts Receivable arising out of a Retainage.

          "Retainage Advance Rate" shall mean the percentage rate specified in
Section 5(C)(3) of the Loan Authorization Agreement as the Advance Rate for the
Retainage Accounts Receivable of Borrower.

          "Retainage Value" shall mean, at the date of determination thereof,
the aggregate face amount of Retainage Accounts Receivable, less taxes,
discounts, credits and allowances, except to the extent otherwise permitted by
Ex-Im Bank in writing.

          "Revolving Loan Facility" shall mean the credit facility or portion
thereof established by Lender in favor of Borrower for the purpose of providing
pre-export working

                                       10

<PAGE>

capital in the form of loans and/or Letters of Credit to finance the
manufacture, production or purchase and subsequent export sale of Items pursuant
to Loan Documents under which Credit Accommodations may be made and repaid on a
continuous basis based solely on the Export-Related Borrowing Base during the
term of such credit facility.

          "Special Conditions" shall mean those conditions, if any, set forth in
Section 13 of the Loan Authorization Agreement.

          "Specific Export Orders" shall mean those Export Orders specified in
Section 5(D) of the Loan Authorization Agreement.

          "Standby Letter of Credit" shall mean those letters of credit subject
to the ISP or UCP issued or caused to be issued by Lender for Borrower's account
that can be drawn upon by a Buyer only if Borrower fails to perform all of its
obligations with respect to an Export Order.

          "Transaction Specific Loan Facility" shall mean a credit facility or a
portion thereof established by Lender in favor of Borrower for the purpose of
providing pre-export working capital in the form of loans and/or Letters of
Credit to finance the manufacture, production or purchase and subsequent export
sale of Items pursuant to Loan Documents under which Credit Accommodations are
made based solely on the Export-Related Borrowing Base relating to Specific
Export Orders and once such Credit Accommodations are repaid they may not be
reborrowed.

          "Transaction Specific Revolving Loan Facility" shall mean a Revolving
Credit Facility established to provide financing of Specific Export Orders.

          "UCC" shall mean the Uniform Commercial Code as the same may be in
effect from time to time in the jurisdiction in which Borrower or Collateral is
located.

          "UCP" shall mean the Uniform Customs and Practice for Documentary
Credits (1993 Revision), International Chamber of Commerce Publication No. 500
and any amendments and revisions thereof.

          "U.S." or "United States" shall mean the United States of America and
its territorial possessions.

          "U.S. Content" shall mean with respect to any Item all the labor,
materials and services which are of U.S. origin or manufacture, and which are
incorporated into an Item in the United States. "Warranty" shall mean Borrower's
guarantee to Buyer that the Items will function as intended during the warranty
period set forth in the applicable Export Order.

          "Warranty Letter of Credit" shall mean a Standby Letter of Credit
which is issued or caused to be issued by Lender to support the obligations of
Borrower with respect to a Warranty or a Standby Letter of Credit which by its
terms becomes a Warranty Letter of Credit.

                                       11

<PAGE>

1.02 Rules of Construction. For purposes of this Agreement, the following
additional rules of construction shall apply, unless specifically indicated to
the contrary: (a) wherever from the context it appears appropriate, each term
stated in either the singular or plural shall include the singular and the
plural, and pronouns stated in the masculine, feminine or neuter gender shall
include the masculine, the feminine and the neuter; (b) the term "or" is not
exclusive; (c) the term "including" (or any form thereof) shall not be limiting
or exclusive; (d) all references to statutes and related regulations shall
include any amendments of same and any successor statutes and regulations; (e)
the words "this Agreement", "herein", "hereof", "hereunder" or other words of
similar import refer to this Agreement as a whole including the schedules,
exhibits, and annexes hereto as the same may be amended, modified or
supplemented; (f) all references in this Agreement to sections, schedules,
exhibits, and annexes shall refer to the corresponding sections, schedules,
exhibits, and annexes of or to this Agreement; and (g) all references to any
instruments or agreements, including references to any of the Loan Documents, or
the Delegated Authority Letter Agreement shall include any and all
modifications, amendments and supplements thereto and any and all extensions or
renewals thereof to the extent permitted under this Agreement.

1.03 Incorporation of Recitals. The Recitals to this Agreement are incorporated
into and shall constitute a part of this Agreement.

                                   ARTICLE II
                             OBLIGATIONS OF BORROWER

     Until payment in full of all Loan Facility Obligations and termination of
the Loan Documents, Borrower agrees as follows:

2.01 Use of Credit Accommodations. (a) Borrower shall use Credit Accommodations
only for the purpose of enabling Borrower to finance the cost of manufacturing,
producing, purchasing or selling the Items. Borrower may not use any of the
Credit Accommodations for the purpose of: (i) servicing or repaying any of
Borrower's pre-existing or future indebtedness unrelated to the Loan Facility
(unless approved by Ex-Im Bank in writing); (ii) acquiring fixed assets or
capital goods for use in Borrower's business; (iii) acquiring, equipping or
renting commercial space outside of the United States; (iv) paying the salaries
of non U.S. citizens or non-U.S. permanent residents who are located in offices
outside of the United States; or (v) in connection with a Retainage or Warranty
(unless approved by Ex-Im Bank in writing).

          (b)  In addition, no Credit Accommodation may be used to finance the
manufacture, purchase or sale of any of the following:

               (i)    Items to be sold or resold to a Buyer located in a country
as to which Ex-Im Bank is prohibited from doing business as designated in the
Country Limitation Schedule;

                                       12

<PAGE>

               (ii)   that part of the cost of the Items which is not U.S.
Content unless such part is not greater than fifty percent (50%) of the cost of
the Items and is incorporated into the Items in the United States;

               (iii)  defense articles or defense services; or

               (iv)   without Ex-Im Bank's prior written consent, any Items to
be used in the construction, alteration, operation or maintenance of nuclear
power, enrichment, reprocessing, research or heavy water production facilities.

2.02 Loan Documents and Loan Authorization Agreement. (a) Each Loan Document and
this Agreement have been duly executed and delivered on behalf of Borrower, and
each such Loan Document and this Agreement are and will continue to be a legal
and valid obligation of Borrower, enforceable against it in accordance with its
terms.

          (b)  Borrower shall comply with all of the terms and conditions of the
Loan Documents, this Agreement and the Loan Authorization Agreement.

2.03 Export-Related Borrowing Base Certificates and Export Orders. In order to
receive Credit Accommodations under the Loan Facility, Borrower shall have
delivered to Lender an Export-Related Borrowing Base Certificate as frequently
as required by Lender but at least within the past thirty (30) calendar days and
a copy of the Export Order(s) (or, for Revolving Loan Facilities, if permitted
by Lender, a written summary of the Export Orders) against which Borrower is
requesting Credit Accommodations. If Lender permits summaries of Export Orders,
Borrower shall also deliver promptly to Lender copies of any Export Orders
requested by Lender. In addition, so long as there are any Credit Accommodations
outstanding under the Loan Facility, Borrower shall deliver to Lender at least
once each month no later than the twentieth (20th) day of such month or more
frequently as required by the Loan Documents, an Export-Related Borrowing Base
Certificate.

2.04 Exclusions from the Export-Related Borrowing Base. In determining the
Export-Related Borrowing Base, Borrower shall exclude therefrom Inventory which
is not Eligible Export-Related Inventory and Accounts Receivable which are not
Eligible Export-Related Accounts Receivable. Borrower shall promptly, but in any
event within five (5) Business Days, notify Lender (a) if any then existing
Export-Related Inventory no longer constitutes Eligible Export-Related Inventory
or (b) of any event or circumstance which to Borrower's knowledge would cause
Lender to consider any then existing Export-Related Accounts Receivable as no
longer constituting an Eligible Export-Related Accounts Receivable.

2.05 Financial Statements. Borrower shall deliver to Lender the financial
statements required to be delivered by Borrower in accordance with Section 11 of
the Loan Authorization Agreement.

2.06 Schedules, Reports and Other Statements. Borrower shall submit to Lender in
writing each month (a) an Inventory schedule for the preceding month and (b) an
Accounts Receivable

                                       13

<PAGE>

aging report for the preceding month detailing the terms of the amounts due from
each Buyer. Borrower shall also furnish to Lender promptly upon request such
information, reports, contracts, invoices and other data concerning the
Collateral as Lender may from time to time specify.

2.07 Additional Security or Payment. (a) Borrower shall at all times ensure that
the Export-Related Borrowing Base equals or exceeds the Credit Accommodation
Amount. If informed by Lender or if Borrower otherwise has actual knowledge that
the Export-Related Borrowing Base is at any time less than the Credit
Accommodation Amount, Borrower shall, within five (5) Business Days, either (i)
furnish additional Collateral to Lender, in form and amount satisfactory to
Lender and Ex-Im Bank or (ii) pay to Lender an amount equal to the difference
between the Credit Accommodation Amount and the Export-Related Borrowing Base.

          (b)  For purposes of this Agreement, in determining the Export-Related
Borrowing Base there shall be deducted from the Export-Related Borrowing Base
(i) an amount equal to twenty-five percent (25%) of the outstanding face amount
of Commercial Letters of Credit and Standby Letters of Credit and (ii) one
hundred percent (100%) of the face amount of Warranty Letters of Credit less the
amount of cash collateral held by Lender to secure Warranty Letters of Credit.

          (c)  Unless otherwise approved in writing by Ex-Im Bank, for Revolving
Loan Facilities (other than Transaction Specific Revolving Loan Facilities),
Borrower shall at all times ensure that the outstanding principal balance of the
Credit Accommodations that is supported by Export-Related Inventory does not
exceed sixty percent (60%) of the sum of the total outstanding principal balance
of the Disbursements and the undrawn face amount of all outstanding Commercial
Letters of Credit. If informed by Lender or if Borrower otherwise has actual
knowledge that the outstanding principal balance of the Credit Accommodations
that is supported by Inventory exceeds sixty percent (60%) of the sum of the
total outstanding principal balance of the Disbursements and the undrawn face
amount of all outstanding Commercial Letters of Credit, Borrower shall, within
five (5) Business Days, either (i) furnish additional non-Inventory Collateral
to Lender, in form and amount satisfactory to Lender and Ex-Im Bank, or (ii) pay
down the applicable portion of the Credit Accommodations so that the above
described ratio is not exceeded.

2.08 Continued Security Interest. Borrower shall not change (a) its name or
identity in any manner, (b) the location of its principal place of business, (c)
the location of any of the Collateral or (d) the location of any of the books or
records related to the Collateral, in each instance without giving thirty (30)
days prior written notice thereof to Lender and taking all actions deemed
necessary or appropriate by Lender to continuously protect and perfect Lender's
Liens upon the Collateral.

2.09 Inspection of Collateral. Borrower shall permit the representatives of
Lender and Ex-Im Bank to make at any time during normal business hours
inspections of the Collateral and of Borrower's facilities, activities, and
books and records, and shall cause its officers and employees to give full
cooperation and assistance in connection therewith.

                                       14

<PAGE>

2.10 General Intangibles. Borrower represents and warrants that it owns, or is
licensed to use, all General Intangibles necessary to conduct its business as
currently conducted except where the failure of Borrower to own or license such
General Intangibles could not reasonably be expected to have a Material Adverse
Effect.

2.11 Notice of Certain Events. Borrower shall promptly, but in any event within
five (5) Business Days, notify Lender in writing of the occurrence of any of the
following:

          (a)  Borrower or any Guarantor (i) applies for, consents to or suffers
the appointment of, or the taking of possession by, a receiver, custodian,
trustee, liquidator or similar fiduciary of itself or of all or a substantial
part of its property or calls a meeting of its creditors, (ii) admits in writing
its inability, or is generally unable, to pay its debts as they become due or
ceases operations of its present business, (iii) makes a general assignment for
the benefit of creditors, (iv) commences a voluntary case under any state or
federal bankruptcy laws (as now or hereafter in effect), (v) is adjudicated as
bankrupt or insolvent, (vi) files a petition seeking to take advantage of any
other law providing for the relief of debtors, (vii) acquiesces to, or fails to
have dismissed within thirty (30) days, any petition filed against it in any
involuntary case under such bankruptcy laws, or (vii) takes any action for the
purpose of effecting any of the foregoing;

          (b)  any Lien in any of the Collateral, granted or intended by the
Loan Documents to be granted to Lender, ceases to be a valid, enforceable,
perfected, first priority Lien (or a lesser priority if expressly permitted
pursuant to Section 6 of the Loan Authorization Agreement) subject only to
Permitted Liens;

          (c)  the issuance of any levy, assessment, attachment, seizure or
Lien, other than a Permitted Lien, against any of the Collateral which is not
stayed or lifted within thirty (30) calendar days;

          (d)  any proceeding is commenced by or against Borrower or any
Guarantor for the liquidation of its assets or dissolution;

          (e)  any litigation is filed against Borrower or any Guarantor which
has had or could reasonably be expected to have a Material Adverse Effect and
such litigation is not withdrawn or dismissed within thirty (30) calendar days
of the filing thereof;

          (f)  any default or event of default under the Loan Documents;

          (g)  any failure to comply with any terms of the Loan Authorization
Agreement;

          (h)  any material provision of any Loan Document or this Agreement for
any reason ceases to be valid, binding and enforceable in accordance with its
terms;

          (i)  any event which has had or could reasonably be expected to have a
Material Adverse Effect; or

                                       15

<PAGE>

          (j)  the Credit Accommodation Amount exceeds the applicable
Export-Related Borrowing Base.

2.12 Insurance. Borrower will at all times carry property, liability and other
insurance, with insurers acceptable to Lender, in such form and amounts, and
with such deductibles and other provisions, as Lender shall require, and
Borrower will provide evidence of such insurance to Lender, so that Lender is
satisfied that such insurance is, at all times, in full force and effect. Each
property insurance policy shall name Lender as loss payee and shall contain a
lender's loss payable endorsement in form acceptable to Lender and each
liability insurance policy shall name Lender as an additional insured. All
policies of insurance shall provide that they may not be cancelled or changed
without at least ten (10) days' prior written notice to Lender and shall
otherwise be in form and substance satisfactory to Lender. Borrower will
promptly deliver to Lender copies of all reports made to insurance companies.

2.13 Taxes. Borrower has timely filed all tax returns and reports required by
applicable law, has timely paid all applicable taxes, assessments, deposits and
contributions owing by Borrower and will timely pay all such items in the future
as they became due and payable. Borrower may, however, defer payment of any
contested taxes; provided, that Borrower (a) in good faith contests Borrower's
obligation to pay such taxes by appropriate proceedings promptly and diligently
instituted and conducted; (b) notifies Lender in writing of the commencement of,
and any material development in, the proceedings; (c) posts bonds or takes any
other steps required to keep the contested taxes from becoming a Lien upon any
of the Collateral; and (d) maintains adequate reserves therefor in conformity
with GAAP.

2.14 Compliance with Laws. Borrower represents and warrants that it has complied
in all material respects with all provisions of all applicable laws and
regulations, including those relating to Borrower's ownership of real or
personal property, the conduct and licensing of Borrower's business, the payment
and withholding of taxes, ERISA and other employee matters, safety and
environmental matters.

2.15 Negative Covenants. Without the prior written consent of Ex-Im Bank and
Lender, Borrower shall not (a) merge, consolidate or otherwise combine with any
other Person; (b) acquire all or substantially all of the assets or capital
stock of any other Person; (c) sell, lease, transfer, convey, assign or
otherwise dispose of any of its assets, except for the sale of Inventory in the
ordinary course of business and the disposition of obsolete equipment in the
ordinary course of business; (d) create any Lien on the Collateral except for
Permitted Liens; (e) make any material changes in its organizational structure
or identity; or (f) enter into any agreement to do any of the foregoing.

2.16 Reborrowings and Repayment Terms. (a) If the Loan Facility is a Revolving
Loan Facility, provided that Borrower is not in default under any of the Loan
Documents, Borrower may borrow, repay and reborrow amounts under the Loan
Facility until the close of business on the Final Disbursement Date. Unless the
Revolving Loan Facility is renewed or extended by Lender with the consent of
Ex-Im Bank, Borrower shall pay in full the outstanding Loan Facility

                                       16

<PAGE>

Obligations and all accrued and unpaid interest thereon no later than the first
Business Day after the Final Disbursement Date.

          (b)  If the Loan Facility is a Transaction Specific Loan Facility,
Borrower shall, within two (2) Business Days of the receipt thereof, pay to
Lender (for application against the outstanding Loan Facility Obligations and
accrued and unpaid interest thereon) all checks, drafts, cash and other
remittances it may receive in payment or on account of the Export-Related
Accounts Receivable or any other Collateral, in precisely the form received
(except for the endorsement of Borrower where necessary). Pending such deposit,
Borrower shall hold such amounts in trust for Lender separate and apart and
shall not commingle any such items of payment with any of its other funds or
property.

2.17 Cross Default. Borrower shall be deemed in default under the Loan Facility
if Borrower fails to pay when due any amount payable to Lender under any loan or
other credit accommodations to Borrower whether or not guaranteed by Ex-Im Bank.

2.18 Munitions List. If any of the Items are articles, services, or related
technical data that are listed on the United States Munitions List (part 121 of
title 22 of the Code of Federal Regulations), Borrower shall send a written
notice promptly, but in any event within five (5) Business Days, of Borrower
learning thereof to Lender describing the Items(s) and the corresponding invoice
amount.

2.19 Suspension and Debarment, etc. On the date of this Agreement neither
Borrower nor its Principals are (a) debarred, suspended, proposed for debarment
with a final determination still pending, declared ineligible or voluntarily
excluded (as such terms are defined under any of the Debarment Regulations
referred to below) from participating in procurement or nonprocurement
transactions with any United States federal government department or agency
pursuant to any of the Debarment Regulations or (b) indicted, convicted or had a
civil judgment rendered against Borrower or any of its Principals for any of the
offenses listed in any of the Debarment Regulations. Unless authorized by Ex-Im
Bank, Borrower will not knowingly enter into any transactions in connection with
the Items with any person who is debarred, suspended, declared ineligible or
voluntarily excluded from participation in procurement or nonprocurement
transactions with any United States federal government department or agency
pursuant to any of the Debarment Regulations. Borrower will provide immediate
written notice to Lender if at any time it learns that the certification set
forth in this Section 2.19 was erroneous when made or has become erroneous by
reason of changed circumstances.

                               RIGHTS AND REMEDIES

3.01 Indemnification. Upon Ex-Im Bank's payment of a Claim to Lender in
connection with the Loan Facility pursuant to the Master Guarantee Agreement,
Ex-Im Bank may assume all rights and remedies of Lender under the Loan Documents
and may enforce any such rights or remedies against Borrower, the Collateral and
any Guarantors. Borrower shall hold Ex-Im Bank and Lender harmless from and
indemnify them against any and all liabilities, damages, claims, costs and
losses incurred or suffered by either of them resulting from (a) any materially
incorrect

                                       17

<PAGE>

certification or statement knowingly made by Borrower or its agent to Ex-Im Bank
or Lender in connection with the Loan Facility, this Agreement, the Loan
Authorization Agreement or any other Loan Documents or (b) any material breach
by Borrower of the terms and conditions of this Agreement, the Loan
Authorization Agreement or any of the other Loan Documents. Borrower also
acknowledges that any statement, certification or representation made by
Borrower in connection with the Loan Facility is subject to the penalties
provided in Article 18 U.S.C. Section 1001.

3.02 Liens. Borrower agrees that any and all Liens granted by it to Lender are
also hereby granted to Ex-Im Bank to secure Borrower's obligation, however
arising, to reimburse Ex-Im Bank for any payments made by Ex-Im Bank pursuant to
the Master Guarantee Agreement. Lender is authorized to apply the proceeds of,
and recoveries from, any property subject to such Liens to the satisfaction of
Loan Facility Obligations in accordance with the terms of any agreement between
Lender and Ex-Im Bank.

                                   ARTICLE IV
                                  MISCELLANEOUS

4.01 Governing Law. This Agreement and the Loan Authorization Agreement and the
obligations arising under this Agreement and the Loan Authorization Agreement
shall be governed by, and construed in accordance with, the law of the state
governing the Loan Documents.

4.02 Notification. All notices required by this Agreement shall be given in the
manner and to the parties provided for in the Loan Agreement.

4.03 Partial Invalidity. If at any time any of the provisions of this Agreement
becomes illegal, invalid or unenforceable in any respect under the law of any
jurisdiction, neither the legality, the validity nor the enforceability of the
remaining provisions hereof shall in any way be affected or impaired.

4.04 Waiver of Jury Trial. BORROWER HEREBY KNOWINGLY, VOLUNTARILY AND
INTENTIONALLY WAIVES ANY AND ALL RIGHTS IT MAY HAVE TO A TRIAL BY JURY IN
RESPECT OF ANY ACTION, SUIT, PROCEEDING OR OTHER LITIGATION BROUGHT TO RESOLVE
ANY DISPUTE ARISING UNDER, ARISING OUT OF OR IN CONNECTION WITH THIS AGREEMENT,
THE LOAN AUTHORIZATION AGREEMENT, ANY LOAN DOCUMENT, OR ANY OTHER AGREEMENT,
DOCUMENT OR INSTRUMENT EXECUTED OR DELIVERED IN CONNECTION HEREWITH OR THEREWITH
OR ANY COURSE OF CONDUCT, COURSE OF DEALING, STATEMENTS (WHETHER VERBAL OR
WRITTEN), OR ACTIONS OR OMISSIONS OF LENDER, EX-IM BANK, OR ANY OTHER PERSON,
RELATING TO THIS AGREEMENT, THE LOAN AUTHORIZATION AGREEMENT OR ANY OTHER LOAN
DOCUMENT.

                                       18

<PAGE>

     IN WITNESS WHEREOF, Borrower has caused this Agreement to be duly executed
as of the 30th day of September, 2002.

AMX CORPORATION, a Texas Corporation,
formerly known as PANJA, INC.

By: /s/ Jean M. Nelson
   ------------------------------------

Name:     Jean M. Nelson
     ----------------------------------
          (Print or Type)

Title:        VP & CFO
      ---------------------------------
          (Print or Type)

ACKNOWLEDGED:

BANK ONE, NA
(Main Office Chicago)

By: /s/ Fred Points
   ------------------------------------

Name: Fred Points
     ----------------------------------
Title: FVP
      ---------------------------------

BANK ONE, NA
Main Office Chicago

By: /s/ Martha Gentry
   ------------------------------------

Name:  Martha Gentry

Title: Vice President

                                       19

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00044-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00044-of-00352.parquet"}]]