UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549

                                 SCHEDULE 13D

                   UNDER THE SECURITIES EXCHANGE ACT OF 1934
                              (AMENDMENT NO. 1)*

                     TRANSACTION SYSTEMS ARCHITECTS, INC.
                     ------------------------------------
                               (Name of Issuer)

                             Class A Common Stock
                     ------------------------------------
                        (Title of Class of Securities)

                                  893416 10 7
                     ------------------------------------
                                (CUSIP Number)

                                 Kent Jamison
                          Locke Purnell Rain Harrell
                               2200 Ross Avenue
                                  Suite 2200
                              Dallas, Texas 75201
                                (214) 740-8416
                     ------------------------------------
           (Name, Address and Telephone Number of Person Authorized
                    to Receive Notices and Communications)

                                 May 13, 1997
                     ------------------------------------
           (Date of Event which Requires Filing of this Statement)


If the filing person has previously filed a statement on Schedule 13G to 
report the acquisition which is the subject of this Schedule 13D, and is 
filing this schedule because of Rule 13d-1(b)(3) or (4), check the following 
box [ ].

Note: Six copies of this statement, including all exhibits, should be filed 
with the Commission.  See Rule 13d-1(a) for other parties to whom copies are 
to be sent.

*The remainder of this cover page shall be filled out for a reporting 
person's initial filing on this form with respect to the subject class of 
securities, and for any subsequent amendment containing information which 
would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be 
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange 
Act of 1934 ("Act") or otherwise subject to the liabilities of that section 
of the Act but shall be subject to all other provisions of the Act (however, 
see the Notes).

                  Exhibit Index is located at page 5 herein.

                        (Continued on following pages)


                                                              Page 1 of 8 Pages



CUSIP No. 893416 10 7
          -----------

- -------------------------------------------------------------------------------
 (1) Names of Reporting Persons
     S.S. or I.R.S. Identification Nos. of Above Persons

                          Steve W. Shepherd
- -------------------------------------------------------------------------------
 (2) Check the Appropriate Box if a Member of a Group
     (See Instructions)                                               (a)  / /
                                                                      (b)  /X/
- -------------------------------------------------------------------------------
 (3) SEC Use Only

- -------------------------------------------------------------------------------
 (4) Source of Funds (See Instructions)
                                 00
- -------------------------------------------------------------------------------
 (5) Check if Disclosure of Legal Proceedings is Required Pursuant to
     Items 2(d) or 2(e)
                                                                           / /
- -------------------------------------------------------------------------------
 (6) Citizenship or Place of Organization
                           United States
- -------------------------------------------------------------------------------
Number of Shares              (7) Sole Voting Power
 Beneficially Owned               1,161,203 (See Items 4 and 5)
 by Each Reporting           --------------------------------------------------
 Person With                  (8) Shared Voting Power
                                  -0- (See Items 4 and 5)
                             --------------------------------------------------
                              (9) Sole Dispositive Power
                                  583,294 (See Items 4 and 5)
                             --------------------------------------------------
                             (10) Shared Dispositive Power
                                  -0-
- -------------------------------------------------------------------------------
(11) Aggregate Amount Beneficially Owned by Each Reporting Person
                        1,161,203 (See Items 4 and 5)
- -------------------------------------------------------------------------------
(12) Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions)
                                                                           / /
- -------------------------------------------------------------------------------
(13) Percent of Class Represented by Amount in Row (11)
                           4.5% (See Items 4 and 5)
- -------------------------------------------------------------------------------
(14) Type of Reporting Person (See Instructions)
                                    IN
- -------------------------------------------------------------------------------


                                                              Page 2 of 8 Pages



CUSIP No. 893416 10 7
          -----------

- -------------------------------------------------------------------------------
 (1) Names of Reporting Persons
     S.S. or I.R.S. Identification Nos. of Above Persons

                          Carol Ann Shepherd
- -------------------------------------------------------------------------------
 (2) Check the Appropriate Box if a Member of a Group
     (See Instructions)                                               (a)  / /
                                                                      (b)  /X/
- -------------------------------------------------------------------------------
 (3) SEC Use Only

- -------------------------------------------------------------------------------
 (4) Source of Funds (See Instructions)
                                 00
- -------------------------------------------------------------------------------
 (5) Check if Disclosure of Legal Proceedings is Required Pursuant to
     Items 2(d) or 2(e)
                                                                           / /
- -------------------------------------------------------------------------------
 (6) Citizenship or Place of Organization
                           United States
- -------------------------------------------------------------------------------
Number of Shares              (7) Sole Voting Power
 Beneficially Owned               -0- (See Items 4 and 5)
 by Each Reporting           --------------------------------------------------
 Person With                  (8) Shared Voting Power
                                  -0- (See Items 4 and 5)
                             --------------------------------------------------
                              (9) Sole Dispositive Power
                                  577,909 (See Items 4 and 5)
                             --------------------------------------------------
                             (10) Shared Dispositive Power
                                  -0- (See Items 4 and 5)
- -------------------------------------------------------------------------------
(11) Aggregate Amount Beneficially Owned by Each Reporting Person
                          577,909 (See Items 4 and 5)
- -------------------------------------------------------------------------------
(12) Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions)
                                                                           / /
- -------------------------------------------------------------------------------
(13) Percent of Class Represented by Amount in Row (11)
                           2.2% (See Items 4 and 5)
- -------------------------------------------------------------------------------
(14) Type of Reporting Person (See Instructions)
                                    IN
- -------------------------------------------------------------------------------


                                                              Page 3 of 8 Pages


CUSIP No. 893416 10 7
          -----------

 ITEM 1. (SECURITY AND ISSUER)

    Not amended. 

ITEM 2. (IDENTITY AND BACKGROUND)

    Not amended. 

ITEM 3. (SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION)

    Item 3 is hereby amended in its entirety by replacing the paragraph set 
forth in the Statement with the following disclosure:

    No funds were required by the Reporting Persons to obtain the beneficial 
ownership of the 583,294 shares held by Steve W. Shepherd or the 577,909 
shares held by Carol Ann Shepherd of the Class A Common Stock of the Company. 
The shares of Class A Common Stock held by the Reporting Persons were 
acquired in exchange for their equity interests in Regency Voice Systems, 
Inc., a Texas corporation ("RVS"), Regency Interactive Services, Inc., a 
Texas corporation ("RIS"), and Regency Voice Systems Investors, Ltd., a Texas 
limited partnership ("Limited"), pursuant to the consummation of the 
transactions described in the Stock Exchange Agreement entered into as of 
April 17, 1997 by and among the Company, RVS, RIS and Limited and the holders 
of equity interests therein (the "Stock Exchange Agreement"), as more fully 
described in Item 4 hereof.

ITEM 4. (PURPOSE OF TRANSACTION)

    Not amended.  

ITEM 5. (INTEREST IN SECURITIES OF THE ISSUER)

    Item 5 is hereby amended in its entirety by replacing the paragraph set 
forth in the Statement with the following disclosure:

    Steve W. Shepherd has sole voting power with respect to 1,161,203 shares 
of Class A Common Stock, constituting 4.5% of the 25,805,731 outstanding 
shares of the Company's Class A Common Stock and 4.1% of the aggregate 
27,976,983 outstanding shares of the Company's Class A Common Stock and Class 
B Common Stock, and sole dispositive power with respect to 583,294 shares of 
Class A Common Stock, constituting 2.2% of the 25,805,731 outstanding shares 
of the Company's Class A Common Stock and 2.0% of the aggregate 27,976,983 
outstanding shares of the Company's Class A Common Stock and Class B Common 
Stock.  

    Carol Ann Shepherd has sole dispositive power with respect to 577,909 
shares of Class A Common Stock, constituting 2.2% of the 25,805,731 
outstanding shares of the Company's Class A Common Stock and 2.0% of the 
aggregate 27,976,983 outstanding shares of the Company's Class A Common Stock 
and Class B Common Stock.


                                                              Page 4 of 8 Pages



CUSIP No. 893416 10 7
          -----------

    As described in Item 4, each of the Reporting Persons acquired the shares 
of Class A Common Stock held thereby in exchange for such Reporting Person's 
shares in RVS and RIS and partnership interests in Limited upon the 
consummation of the transactions described in the Stock Exchange Agreement on 
the Closing Date of May 13, 1997.  The closing of the transactions under the 
Stock Exchange Agreement (the "Closing") was effected by telecopy.  At the 
Closing, an aggregate of 1,076,903.8462 shares of Class A Common Stock of the 
Company were issued to the RVS Shareholders in exchange for the outstanding 
shares of RVS Common Stock, 19.2308 shares of Class A Common Stock were 
issued to the RIS Shareholders in exchange for the outstanding shares of RIS 
Common Stock, and 538,461.5385 shares of Class A Common Stock were issued to 
the Partners in exchange for all of the Partners' partnership interests in 
Limited. 

    At the Closing, Mr. Shepherd received 519,606.7 shares of Class A Common 
Stock in exchange for 212,500 shares of RVS Common Stock, 9.618 shares of 
Class A Common Stock in exchange for 70,000 shares of RIS Common Stock and 
248,677.69 shares of Class A Common Stock in exchange for 46.183% of the 
partnership interests in Limited.  At the Closing, Ms. Shepherd received 
519,606.7 shares of Class A Common Stock in exchange for 212,500 shares of 
RVS Common Stock, 9.618 shares of Class A Common Stock in exchange for 70,000 
shares of RIS Common Stock and 243,293.07 shares of Class A Common Stock in 
exchange for 45.183% of the partnership interests in Limited.

    At October 1, 1997, the Reporting Persons ceased to be the beneficial 
owners of more than five percent (5%) of the outstanding shares of the 
Company's Class A Common Stock and of the aggregate outstanding shares of the 
Company's Class A Common Stock and Class B Common Stock.

ITEM 6. (CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH
RESPECT TO SECURITIES OF THE ISSUER)

    Not amended.

ITEM 7. (MATERIAL TO BE FILED AS EXHIBITS)

    Exhibit 1:     Agreement pursuant to Rule 13d-1(f)(1)(iii).

    Exhibit 2:     Stock Exchange Agreement entered into as of April 17, 1997
                   by and among the Company, RVS, RIS, Limited, the RVS 
                   Shareholders, the RIS Shareholders and the Partners 
                   (previously filed in the Reporting Persons' Schedule 13D 
                   filed May 1997).


                                                              Page 5 of 8 Pages



CUSIP No. 893416 10 7
          -----------

                                   SIGNATURE

    After reasonable inquiry and to the best of my knowledge and belief.  I 
certify that the information set forth in this Statement is true, complete 
and correct.

Date:  October 3, 1997

                                            /s/ Steve W. Shepherd
                                            ------------------------------
                                            Steve W. Shepherd















                                                              Page 6 of 8 Pages




CUSIP No. 893416 10 7
          -----------

                                   SIGNATURE

    After reasonable inquiry and to the best of my knowledge and belief.  I 
certify that the information set forth in this Statement is true, complete 
and correct.

Date:  October 3, 1997

                                            /s/ Carol Ann Shepherd
                                            ------------------------------
                                            Carol Ann Shepherd









                                                              Page 7 of 8 Pages

 ------------------------
  CUSIP NO. 893416 10 7
 ------------------------


                                   EXHIBIT 1


    Pursuant to Rule 13d-1(f)(1)(iii) of Regulation 13D-G of the General Rules
and Regulations of the Securities Exchange Commission under the Securities 
Exchange Act of 1934, as amended, the undersigned agree that the Statement to 
which this Exhibit is attached is filed on behalf of each of them.

                                       /s/ Steve W. Shepherd
                                       ---------------------------------------
                                       Steve W. Shepherd


                                       /s/ Carol Ann Shepherd
                                       ---------------------------------------
                                       Carol Ann Shepherd












                                                              Page 8 of 8 Pages