FIRST PROSPECTUS SUPPLEMENT                     Filed Pursuant to Rule 424(b)(3)
(to Prospectus dated May 4, 1999)               Registration No. 333-77729


                                1,149,000 Shares


                                VTEL CORPORATION
                                  Common Stock
                                 $.01 par value


                          -----------------------------


         This first prospectus supplement  supplements and amends the prospectus
dated May 4, 1999, relating to 1,149,000 shares of our common stock, that may be
offered and sold from time to time by certain of our stockholders.

         Our common  stock is traded on the  Nasdaq  National  Market  under the
symbol  "VTEL." On July 19, 1999,  the closing price for our common stock on the
Nasdaq National Market was $5.19.

         We will receive none of the proceeds  from the sale of the common stock
offered by the selling  stockholders.  We will pay for expenses of preparing and
filing  the  registration  statement,  the  prospectus,  this  first  prospectus
supplement and all other prospectus  supplements.  The selling stockholders will
pay all selling and other expenses that they incur.

         The  prospectus,   together  with  this  first  prospectus  supplement,
constitutes  the  prospectus  required to be  delivered  by Section  5(b) of the
Securities  Act with respect to offers and sales of the shares of common  stock.
All references in the prospectus to "this prospectus" are hereby amended to read
"this prospectus (as supplemented and amended)".

         YOU SHOULD READ THE PROSPECTUS AND THIS PROSPECTUS SUPPLEMENT CAREFULLY
BEFORE YOU INVEST, INCLUDING THE RISK FACTORS WHICH BEGIN ON PAGE 2 OF THE
PROSPECTUS.



     NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES
   COMMISSION HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR DETERMINED IF
    THIS PROSPECTUS SUPPLEMENT IS TRUTHFUL OR COMPLETE. ANY REPRESENTATION TO
                       THE CONTRARY IS A CRIMINAL OFFENSE.


                          -----------------------------



            The date of this Prospectus Supplement is July 22, 1999.





The prospectus is hereby amended to modify the table located in the section of the prospectus entitled "Plan of Distribution; Selling Stockholder" to delete the reference to Vosaic Company, LLC and, in lieu thereof, add the following information: The table below sets forth information as of July 22, 1999 concerning beneficial ownership of the shares of the selling stockholders therein listed. All information concerning beneficial ownership has been furnished by the selling stockholders. Number of Shares of Common Stock Common Stock Number of Shares Beneficially Owned Beneficially Owned of Common Stock After Offering(1) Selling Stockholder Prior to Offering Offered Number Percent Vosaic Company, LLC(2) 397,769 397,769 -- -- Stuart Johnstone 143,469 143,469 -- -- Charles G. Colby, Jr. 147,082 147,082 -- -- Pacific Advisors, Inc. 34,607 34,607 -- -- Roy Campbell 41,174 41,174 -- -- See-Mong Tan 25,083 25,083 -- -- Zhigang Chen 27,842 27,842 -- -- Dong Xie 2,204 2,204 -- -- Miguel Valdez 2,015 2,015 -- -- Dave Raila 1,694 1,694 -- -- Fabio Kon 435 435 -- -- Matt Younkle 320 320 -- -- Chuck Thompson 93 93 -- -- Erik Simon 252 252 -- -- Doug Jones 64 64 -- -- Willy Liao 64 64 -- -- Martin Bargon 28 28 -- -- Tim Offenstein 28 28 -- -- Kent Johnson 1,225 1,225 -- -- Irwin Smith 1,225 1,225 -- -- Dan Grigsby 7,500 7,500 -- -- Digital Video Communications, Inc. 314,827 314,827 -- --

- -------------------- (1) Assumes that all shares of common stock offered hereby by the selling stockholders are actually sold. Such presentation is based on 24,264,537 shares of common stock outstanding as of March 9, 1999. (2) The address of Vosaic is 2320 Grand Canal Venice, California 90291. The selling stockholders have not, nor within the past three years have the selling stockholders had, any position, office or other material relationship with us or any of our predecessors or affiliates, except that See Mong-Tan, Zhigang Chen, Miguel Valdez and Jim Wong have become employees of VTEL. The shares of common stock beneficially owned by the selling stockholders, together with the underlying registration rights, were acquired in a private transaction from Vosaic. Additional selling stockholders or other information concerning the above listed selling stockholders may be set forth from time to time in additional prospectus supplements.