[letterhead of Jenkens & Gilchrist]

                                 May 4, 1999



VTEL Corporation
108 Wild Basin Road
Austin, Texas 78746

         Re:      VTEL Corporation
                  Registration Statement on Form S-3

Ladies and Gentlemen:

         This  firm  has  acted  as  counsel  to VTEL  Corporation,  a  Delaware
corporation  (the  "Company"),   in  connection  with  the  preparation  of  the
Registration  Statement on Form S-3 (the  "Registration  Statement") to be filed
with the  Securities and  Exchange  Commission on or  about May 4,  1999,  under
the  Securities  Act of 1933,  as amended (the  "Securities  Act"),  relating to
1,149,000  shares (the "Shares") of the Company's  common stock, par value $0.01
per share (the "Common Stock") held by Vosaic Company, LLC.

         You have  requested  the  opinion of this firm with  respect to certain
legal aspects of the proposed offering. In connection  therewith,  this firm has
examined and relied upon the original, or copies identified to our satisfaction,
of (1) the Company's Certificate of Incorporation and the bylaws of the Company,
as amended; (2) minutes and records of the corporate  proceedings of the Company
with  respect  to the  issuance  of the  Shares  and  related  matters;  (3) the
Registration  Statement and exhibits  thereto;  and (4) such other documents and
instruments  as this  firm has  deemed  necessary  for the  expression  of these
opinions.  In making  the  foregoing  examinations,  this firm has  assumed  the
genuineness of all signatures and the authenticity of all documents submitted to
this  firm as  originals,  and  the  conformity  to  original  documents  of all
documents  submitted  to this firm as  certified or  photostatic  copies.  As to
various questions of fact material to this opinion letter, and as to the content
and form of the  Certificate of  Incorporation,  the bylaws,  minutes,  records,
resolutions  and other  documents  or  writings  of the  Company,  this firm has
relied, to the extent it deems reasonably  appropriate,  upon representations or
certificates of officers or directors of the Company and upon documents, records
and instruments furnished to this firm by the Company, without independent check
or verification of their accuracy.

         Based  upon our  examination,  consideration  of, and  reliance  on the
documents and other matters  described  above,  this firm is of the opinion that
the Shares are duly authorized, validly issued, fully paid and nonassessable.







VTEL Corporation
May 4, 1999
Page 2



         The opinions  expressed in this Opinion  Letter  assume that the Shares
were duly authorized and validly issued by the Company.

         This firm hereby  consents to the filing of this  opinion  letter 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, this firm
does not admit that it comes  within the  category  of person  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, Esq.