EXHIBIT (b)(3)


February 2, 2004

Mr. Brian Schwartz
Managing Director
H.I.G. Capital, LLC
1001 Brickell Bay Drive
27th Floor
Miami, Florida  33131

Dear Brian:

We are pleased to advise H.I.G. Capital, LLC ("HIG") that American Capital
Strategies, Ltd. ("ACAS") commits (the "COMMITMENT") to HIG, TZ Holdings, Inc.
("TZHI") and TZ Acquisition, Inc. ("TZAI" and, collectively with TZHI, the
"ACQUIRORS") to purchase $15,000,000 of senior secured subordinated notes (the
"SENIOR SUB NOTES") and $11,000,000 of junior secured subordinated notes (the
"JUNIOR SUB NOTES" and together with the Senior Sub Notes, the "NOTES") in
connection with the acquisition of T-NETIX, Inc. and all of its subsidiaries
(collectively, "T-NETIX") by TZAI as more fully described in that certain
Agreement and Plan of Merger (the "MERGER AGREEMENT") by and among TZHI, TZAI
and T-NETIX (the "ACQUISITION"), subject to the terms and conditions set forth
in this letter and the attached Financing Term Sheet dated February 2, 2004 (the
"TERM SHEET", which forms a part of this letter and is incorporated herein by
reference). As used herein, "OLD T-NETIX" shall mean T-NETIX, Inc. and all of
its subsidiaries prior to the merger contemplated by the Merger Agreement (the
"MERGER") and "NEW T-NETIX" shall mean T-NETIX, Inc. and all its subsidiaries
after the Merger.

CONDITIONS TO CLOSING: Without limiting the foregoing, ACAS will not be
obligated to perform under the Commitment unless and until the Conditions
Precedent as outlined in the Term Sheet have been satisfied.

INDEMNIFICATION: HIG and the Acquirors agree to indemnify and hold harmless ACAS
and its affiliates and each of their respective directors, officers, employees
and agents (collectively, the "INDEMNIFIED PARTIES" and individually, an
"INDEMNIFIED PARTY"), from and against any and all losses, claims, damages,
expenses or liabilities to which any Indemnified Party may become subject,
insofar as such losses, claims, damages, expenses or liabilities (or actions,
suits or proceedings, including any inquiry or investigation or claims in
respect thereof) arise out of, in any way relate to, or result from a claim made
by a Third Party (as hereinafter defined) in respect of, the transactions
described in this letter or the financing contemplated hereby (whether or not
any Indemnified Party is a party to any action or proceeding out of which any
such losses, claims, damages, expenses or liabilities arise), and to reimburse
each Indemnified Party upon demand, for any reasonable and documented legal
expenses or other reasonable and documented expenses incurred by any Indemnified
Party in or in connection with investigating, preparing to defend, defending or
otherwise participating in any such claim, action or proceeding related to any
such loss, claim, damage or liability, except that HIG and the Acquirors shall
not be obligated to indemnify, hold harmless or reimburse any Indemnified Party
to the extent that any such losses, claims, damages, expenses or liabilities are
determined in a final judgment by a court of competent jurisdiction to have
resulted solely from the gross negligence or willful misconduct of such
Indemnified Party. The term "THIRD PARTY" as used in this letter means any
person, corporation or entity other than HIG or an Acquiror.

EXPIRATION OF COMMITMENT: The Commitment shall expire at 5:00 p.m., Central
Standard Time, on February 2, 2004, if not accepted by that time. If the
Commitment is accepted on or before its expiration in accordance with the
preceding sentence, the Commitment will nevertheless terminate at 5:00p.m.,
Central Standard Time, on March 31, 2004.



H.I.G. Capital, LLC
February 2, 2004
Page 2 of 2

This letter may be executed by the parties hereto in one or more counterparts,
each of which shall be an original and all of which together shall constitute
but one and the same Commitment.

This letter supercedes and replaces, in their entirety, all prior term sheets,
discussions, indications of interests and proposals (whether written or oral)
previously delivered to HIG.

If you are in agreement with the foregoing, please sign and return this letter
to ACAS at the address indicated above. The Commitment will become effective
upon execution by an officer of HIG, receipt of the Commitment Fee, and
reimbursement of Pre-Commitment Expenses.

Very truly yours,

American Capital Strategies, Ltd.




/s/  Darin R. Winn
- -----------------------------------
Darin R. Winn
Managing Director




Accepted and approved this 2nd day of February, 2004

H.I.G. Capital, LLC


By:  /s/  Brian Schwartz
- -----------------------------------
Name: Brian Schwartz
Title: Managing Director



H.I.G. Capital, LLC
February 2, 2004






                                   TERM SHEET

                                FEBRUARY 2, 2004

ISSUER:                       Prior to the completion of the Acquisition, TZAI,
                              and following the completion of the Merger, New
                              T-NETIX.

SECURITIES:                   $15.0 million aggregate principal amount of Senior
                              Sub Notes and $11.0 million aggregate principal
                              amount Junior Sub Notes.

PURCHASER:                    ACAS

USE OF PROCEEDS:              The proceeds of the purchase of the Notes shall be
                              used to (1) finance the Acquisition, and (2) pay
                              associated fees, costs and expenses.

SENIOR SUBORDINATED NOTES

PRINCIPAL AMOUNT OF NOTES:    $150,000,000.


INTEREST RATE:                The Senior Sub notes shall bear a fixed cash
                              interest rate of 12.0% per annum, payable monthly
                              in arrears. An additional interest rate of 5.5%
                              per annum shall accrue monthly (the "SENIOR PIK
                              INTEREST") and shall be added to the principal
                              balance of the Senior Sub Notes. In an event of
                              default, the cash interest rate will increase by
                              2.0%.

MATURITY AND AMORTIZATION:    The principal balance of the Senior Sub Notes plus
                              all accrued and unpaid interest shall be payable
                              in full on the 6th anniversary of the closing date
                              of the Acquisition (the "Closing Date").

JUNIOR SUBORDINATED NOTES

PRINCIPAL AMOUNT OF NOTES:    $11,000,000.

INTEREST RATE:                The Junior Sub Notes shall bear a fixed cash
                              interest rate of 12.0% per annum fixed, payable
                              monthly in arrears. An additional interest rate of
                              8.0% per annum shall accrue monthly (the "JUNIOR
                              PIK INTEREST") and shall be added to the principal
                              balance of the Junior Sub Notes. In an event of
                              default, the cash interest rate will increase by
                              2.0%.

MATURITY AND AMORTIZATION:    The principal balance of the Junior Sub Notes plus
                              all accrued and unpaid interest shall be payable
                              in full on the 6th anniversary of the Closing
                              Date.






H.I.G. Capital, LLC
February 2, 2004


OTHER TERMS OF THE NOTES

COLLATERAL:                   Prior to the completion of the Acquisition, the
                              Notes will be secured by a subordinated lien on
                              the capital stock of the Acquirors and the capital
                              stock of Old T-NETIX held by TZAI. After
                              completion of the Acquisition, the Notes will be
                              secured by a subordinated lien on all the stock
                              and assets of TZHI and New T-NETIX.

SUBORDINATION:                The Notes shall be subordinate and junior in right
                              of payment, on terms acceptable to ACAS, to the
                              senior secured credit facilities of TZHI and
                              T-NETIX of up to $50.0 million (the "SENIOR CREDIT
                              FACILITY") provided by Dymas Funding Company, LLC
                              ("DYMAS"), consisting of (1) a $17.0 million four
                              year term loan facility which will be fully drawn
                              on the Closing Date, (2) a $19.0 million four year
                              term loan facility which will be fully drawn on
                              the Closing Date and (3) a $14.0 million four year
                              revolving facility (the "REVOLVING Facility"), of
                              which approximately $2.0 million (and up to a
                              maximum of $5.5 million ) will be drawn on the
                              Closing Date. ACAS and shall enter into an
                              Intercreditor Agreement with Dymas, as agent for
                              the senior lenders, with respect to the Notes. The
                              Intercreditor Agreement shall be on terms that are
                              acceptable to ACAS.

                              The Junior Sub Notes shall be subordinate and
                              junior in right of payment to the Senior Sub
                              Notes.


MANDATORY PREPAYMENTS:        Mandatory prepayments of the Notes will be made
                              upon the occurrence of any of the following
                              events:

                              (1)  A public offering of New T-NETIX's
                                   securities; or

                              (2)  A change in control, merger, consolidation or
                                   similar combination, sale of a material
                                   portion of New T-NETIX's assets, or other
                                   similar transaction.

FINANCIAL COVENANTS:          The documentation for the Notes shall contain
                              financial covenants of TZHI and New T-NETIX,
                              including but not limited to:

                              (1)  Minimum fixed charge coverage ratio;

                              (2)  Maximum funded debt to EBITDA ratio
                                   satisfactory to ACAS;

                              (3)  Maximum funded debt to EBITDA ratio at the
                                   Closing Date satisfactory to ACAS;

                              (4)  Annual capital expenditure limitations; and



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H.I.G. Capital, LLC
February 2, 2004



                              (5)  Other financial covenants reasonably
                                   acceptable to ACAS.

                              Such covenants shall be based on the most recent
                              twelve months' performance of New T-NETIX and
                              shall be set at a maximum 10% set-off from similar
                              covenants contained in the Senior Credit Facility.

TRANSFERABILITY:              The Notes, as well as each holder's interest
                              therein, will be freely transferable (subject to
                              securities laws) on the Closing Date or subsequent
                              to the Closing Date.

BOARD RIGHTS:                 American Capital shall receive (1) attendance
                              privileges to all meetings of the boards of
                              directors (the "BOARDS") of TZHI and New T-NETIX,
                              as well as all committees of the Boards, (2) all
                              information normally provided to members of the
                              Boards, and (3) reimbursement of out-of-pocket
                              expenses for all meetings attended.

CONDITIONS PRECEDENT:         The obligation of ACAS to purchase the Notes will
                              be subject to customary conditions precedent,
                              including, without limitation:

                              (1)  Satisfaction with the legal structure and
                                   documentation of the Acquisition and the
                                   Transactions and, after giving affect
                                   thereto, TZHI will own more than 50% of the
                                   stock of New T-NETIX and in no event stock
                                   representing less than voting control of New
                                   T-NETIX. As used herein, the term
                                   "TRANSACTIONS" means (a) the borrowings under
                                   the Senior Credit Facility, (b) the issuance
                                   of the Notes, (c) equity investment by HIG
                                   and ACAS of not less than $20.0 million (the
                                   "Equity Financing"), and (d) the payments of
                                   fees and expenses in connection with each of
                                   the foregoing.

                              (2)  No material adverse effect on the business,
                                   affairs, management, results of operations,
                                   financial condition, assets or liabilities of
                                   the TZHI and New T-NETIX, taken as a whole,
                                   after giving effect to the Acquisition and
                                   the Transactions (a "MATERIAL ADVERSE
                                   EFFECT"), or any development that ACAS
                                   considers reasonably likely to result in a
                                   Material Adverse Effect.


                              (3)  Satisfaction by ACAS, in its sole discretion,
                                   with the capital structure of the Acquirors
                                   and Old T-NETIX, and the terms of any
                                   outstanding indebtedness, including any
                                   indebtedness issued to facilitate the
                                   Acquisition.



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H.I.G. Capital, LLC
February 2, 2004


                              (4)  Cash equity of not less than $20.0 million of
                                   the pro forma capitalization of TZHI and New
                                   T-NETIX invested by HIG and ACAS (the "EQUITY
                                   INVESTORS").

                              (5)  No claim, action, suit, investigation,
                                   litigation or proceeding, pending or
                                   threatened in any court or before any
                                   arbitrator or governmental instrumentality,
                                   that relates to the Acquisition or the
                                   Transaction, or that, in the opinion of ACAS,
                                   has a reasonable likelihood of having a
                                   Material Adverse Effect.

                              (6)  Evidence satisfactory to ACAS of the absence
                                   of any other liens on the collateral
                                   described herein, other than such liens
                                   previously mentioned or approved by ACAS in
                                   its sole discretion.

                              (7)  HIG, the Acquirors and Old T-NETIX shall have
                                   obtained all required licenses, approvals,
                                   waivers and consents, governmental and
                                   otherwise, in connection with the Acquisition
                                   and the Transactions, all of which shall
                                   remain in full force and effect.

                              (8)  TZHI and New T-NETIX shall have insurance
                                   satisfactory to ACAS.

                              (9)  HIG and the Acquirors shall have delivered to
                                   ACAS, within twenty (20) days following the
                                   end of each month beginning with the month
                                   ended January 31, 2004 (and including the
                                   month ended December 31, 2003) and ending
                                   prior to the Closing Date, complete and
                                   correct copies of the monthly financial
                                   reports of Old T-NETIX in the same format as
                                   the reports previously provided by Old
                                   T-NETIX to ACAS.

                              (10) All fees and expenses payable to ACAS shall
                                   have been paid to the extent due in
                                   accordance with the terms herein.

                              (11) Old T-NETIX shall have a minimum trailing
                                   twelve-month pro forma adjusted EBITDA at
                                   the Closing Date satisfactory to ACAS
                                   (subject to such add-backs to be mutually
                                   agreed upon by ACAS and HIG).

                              (12) Not more than $5.5 million shall be funded
                                   under the Revolving Facility (such specific
                                   funding amount subject to working capital
                                   fluctuations to be discussed and mutually
                                   agreed upon) at the Closing Date, and Old
                                   T-NETIX shall have, at the Closing Date, a
                                   minimum unused but available borrowing
                                   capacity under the Revolving Facility of not
                                   less than $3.0 million, in each instance,
                                   after (1) giving effect to the initial
                                   advances made under the Senior Credit
                                   Facility on the Closing Date, (2) existing
                                   letters of credit, and (3) the payment of all
                                   fees and expenses related to the Acquisition
                                   and the Transactions.



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H.I.G. Capital, LLC
February 2, 2004


                              (13) The Acquirors shall have received an amount
                                   of funds under the Senior Credit Facility,
                                   the purchase of the Notes, and the Equity
                                   Financing sufficient to consummate the
                                   Acquisition; provided that the Acquirors
                                   shall have received not less than $20.0
                                   million in proceeds from the Equity
                                   Investors.

COVENANTS:                    Except as specified under Conditions Precedent,
                              covenants under the definitive documentation
                              entered into in connection with the purchase of
                              the Notes will be standard and customary for
                              transactions of this type.


EVENTS OF DEFAULT:            The definitive documentation with respect to the
                              Notes shall contain customary events of default
                              for a transaction and company of this nature,
                              including, without limitation, payment,
                              cross-default on other indebtedness or liability,
                              violation of covenants, breach of representation
                              or warranty, environmental, challenge to validity
                              of documents, lien ceases to be perfected, first
                              priority, no judgments, change of control, ERISA,
                              injunction or restraint on material portion of
                              business, strike, lockout or other act restricting
                              conduct of business, or indictment of a Borrower
                              or any senior officer. The definitive
                              documentation shall also include an event of
                              default for any change of key management not
                              replaced within 90 days of a person reasonably
                              satisfactory to ACAS.

REPRESENTATIONS AND
  WARRANTIES:                 Customary for financings of this type.

EQUITY CO-INVESTMENT:         ACAS shall be given the opportunity to con-invest
                              up to $1,000,000 in TZHI in the same class of
                              equity and on the same terms as HIG.

DOCUMENTATION:                The Acquirors and Old T-NETIX will enter into
                              definitive legal documentation prepared by ACAS'
                              counsel on terms and conditions that are normal
                              and customary for transactions of this type.

GOVERNING LAW:                The definitive legal documentation shall be
                              governed by the laws of the State of New York.





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