Exhibit 5.1


                                  May 4, 1999


VTEL Corporation
108 Wild Basin Road
Austin, Texas 78746

         Re:      Registration Statement on Form S-8

Gentlemen:

         We have acted as counsel to VTEL  Corporation,  a Delaware  corporation
(the  "Corporation"),  in connection  with the  preparation of the  Registration
Statement  on Form  S-8 (the  "Registration  Statement")  to be  filed  with the
Securities and  Exchange  Commission on  May 4, 1999,  under the  Securities Act
of 1933, as amended (the "Securities Act"),  relating to 1,000,000 shares of the
$.01 par value common stock (the "Common Stock") of the Corporation  that may be
offered through the VTEL Corporation 1998 Restricted Stock Plan (the "Plan").

         You have  requested  the  opinion of this firm with  respect to certain
legal  aspects  of the  proposed  offering.  In  connection  therewith,  we have
examined and relied upon the original, or copies identified to our satisfaction,
of (1) the Certificate of Incorporation  and the Bylaws of the  Corporation,  as
amended; (2) minutes and records of the corporate proceedings of the Corporation
with respect to the  establishment  of the Plan,  the  reservation  of 1,000,000
shares of Common Stock to be issued under the Plan and to which the Registration
Statement  relates,  the issuance of shares of Common Stock pursuant to the Plan
and related  matters;  (3) the  Registration  Statement  and  exhibits  thereto,
including  the Plan;  and (4) such other  documents and  instruments  as we have
deemed necessary for the expression of the opinions herein contained.  In making
the foregoing  examinations,  we have assumed the  genuineness of all signatures
and the  authenticity  of all documents  submitted to us as  originals,  and the
conformity to original  documents of all documents  submitted to us as certified
or photostatic copies. As to various questions of fact material to this opinion,
and as to the content and form of the Certificate of Incorporation,  the Bylaws,
minutes,   records,   resolutions   and  other  documents  or  writings  of  the
Corporation, we have relied, to the extent we deem reasonably appropriate,  upon
representations  or certificates of officers or directors of the Corporation and
upon  documents,  records and  instruments  furnished to us by the  Corporation,
without independent check or verification of their accuracy.







VTEL Corporation
May 4, 1999



         Based upon our examination and  consideration  of, and reliance on, the
documents  and other  matters  described  above,  we are of the opinion that the
Corporation  presently has available at least 1,000,000 shares of authorized but
unissued  shares of Common Stock and/or  treasury  shares of Common Stock.  From
these shares of Common  Stock,  the shares of Common  Stock  proposed to be sold
through  the Plan may be  issued.  Assuming  that:  (i) shares to be sold in the
future through the Plan are all in accordance  with the terms of the Plan,  (ii)
the  shares  of  Common  Stock to be issued  in the  future  are duly  issued in
accordance  with the  terms of the  Plan,  (iii) the  Corporation  maintains  an
adequate  number of authorized  but unissued  shares and/or  treasury  shares of
Common Stock available for issuance to those persons who purchase shares through
the Plan, and (iv) the  consideration for shares of Common Stock issued pursuant
to the Plan is actually  received by the Corporation as provided in the Plan and
exceeds the par value of such shares,  then the shares of Common Stock issued in
accordance with the terms of the Plan or sold through and in accordance with the
terms of the Plan will be duly and validly issued, fully paid and nonassessable.

         We hereby  consent to the  filing of this  opinion as an exhibit to the
Registration  Statement and to references to our firm included in or made a part
of the Registration  Statement.  In giving this consent, we do not admit that we
come within the category of persons whose consent is required under Section 7 of
the Securities  Act or the Rules and  Regulations of the Securities and Exchange
Commission thereunder.

                                                     Very truly yours,

                                                     JENKENS & GILCHRIST,
                                                     a Professional Corporation


                                                     By:  /s/ L. Steven Leshin
                                                          ----------------------
                                                          L. Steven Leshin