SECURITIES AND EXCHANGE COMMISSION
                             Washington, D. C. 20549

                                 SCHEDULE 13D/A

                    Under the Securities Exchange Act of 1934

                               (Amendment No. 7*)


                           VOICE CONTROL SYSTEMS, INC.
                                (Name of Issuer)

                          Common Stock, $.01 par value

                         (Title of Class of Securities)

                                   92861B100
                                 (CUSIP Number)

                              Dialogic Corporation
                                  1515 Route 10
                          Parsippany, New Jersey 07054
                       (Name, Address and Telephone Number
                         of Person Authorized to Receive
                           Notices and Communications)

                                 January 1, 1997
             (Date of Event which Requires Filing of this Statement)

If the filing person has previously  filed a statement on Schedule l3G 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 |_|.

Check the following box if a fee is being paid with this  statement  |_|. (A fee
is not required only if the reporting  person:  (1) has a previous  statement on
file  reporting  beneficial  ownership of more than five percent of the class of
securities  described  in Item 1;  and (2) has  filed  no  amendment  subsequent
thereto reporting beneficial ownership of less than five percent of such class.
See Rule 13d-7.)

Note: Six copies of this statement, including all exhibits, should be filed with
the Commission. See Rule l3d-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).



CUSIP No.   9261B100


(1)  Name of Reporting Person (S.S. or I.R.S. Identification Nos. of Above
     Person):

                 Dialogic Corporation                                22-2476114
- --------------------------------------------------------------------------------

(2)  Check the Appropriate Box if a Member of a Group (See Instructions):
                                                                    (a) |_|
                                                                    (b) |_|
- --------------------------------------------------------------------------------

(3)  SEC Use Only

- --------------------------------------------------------------------------------
(4)  Source of Funds (See Instructions)                                    N/A
                                                    
- --------------------------------------------------------------------------------
(5)  Check Box if Disclosure of Legal Proceedings is Required Pursuant
     to Items 2(d) or 2(e):                                                |_|

- --------------------------------------------------------------------------------
(6)  Citizenship or Place of Organization:                           New Jersey

- --------------------------------------------------------------------------------
Number of Shares        (7)     Sole Voting Power:                  1,399,715
Beneficially Owned      (8)     Shared Voting Power:                        0
by Each Reporting       (9)     Sole Dispositive Power:             1,399,715
Person With:            (10)    Shared Dispositive Power:                   0
- --------------------------------------------------------------------------------

(11) Aggregate Amount Beneficially Owned by Each Reporting Person:  1,399,715
- --------------------------------------------------------------------------------

(12) Check if the Aggregate Amount in Row (11) Excludes
     Certain Shares (See Instructions):                                    |_|
- --------------------------------------------------------------------------------

(13) Percent of Class Represented by Amount in Row (11):                 12.7%
- --------------------------------------------------------------------------------

(14) Type of Reporting Person (See Instructions):                         CO
- --------------------------------------------------------------------------------



                                 SCHEDULE 13D/A


                                 AMENDMENT NO. 7

                     REPORTING PERSON: DIALOGIC CORPORATION

                       ISSUER: VOICE CONTROL SYSTEMS, INC.

                              CUSIP NO.: 92861B100



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

     In September 1991, Dialogic Corporation  ("Dialogic") completed a series of
agreements with a predecessor of Voice Control  Systems,  Inc. ("VCS") which, in
relevant  part,  and as  amended  to date,  resulted  in  Dialogic  acquiring  a
convertible promissory note in the principal amount of $1,161,798.90 of VCS (the
"Note"),  which Note bore interest at a prime rate plus 2%. Interest was payable
on the Note on  September  20 of each year  through  maturity  of the Note.  The
principal was payable in full on January 1, 1997.  Under the Note,  Dialogic had
the  right to  convert  all or any part of the  principal  amount  plus  accrued
interest  outstanding  into shares of Common Stock of VCS at a rate of one share
for each $.9188 of principal and interest.  The principal amount of the Note was
convertible, at that rate, into 1,264,474 shares of VCS' Common Stock. From time
to time,  Dialogic  acquired  shares of VCS  Common  Stock  upon  conversion  of
interest  payable on the Note.  On January 1, 1997 Dialogic  acquired  1,300,694
shares of VCS Common Stock upon  conversion of the principal  amount of the Note
and upon conversion of all interest due Dialogic through December 31, 1996.


ITEM 5.  INTEREST AND SECURITIES OF THE ISSUER.

     (a)  Aggregate Number: 1,399,715 shares; 12.7%

          To the best knowledge of Dialogic,  none of the individuals  listed in
          response to Item 2 beneficially own any securities of VCS.

     (b)  Dialogic has the sole power to vote and dispose of the VCS  securities
          which it beneficially owns.

     (c)  Not applicable.

     (d)  Not applicable.

     (e)  Not applicable.



ITEM 8.  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.

                                          DIALOGIC CORPORATION



January 23, 1997                          By: /s/ Edward B. Jordan
                                              __________________________________
                                              Edward B. Jordan
                                              Vice President and Chief Financial
                                              Officer



     Attention:  Intentional  misstatements  or  omissions  or  fact  constitute
Federal criminal violations (See 18 U.S.C. 1001).