Zohar Zisapel Announces Results of Partial Tender Offer for RADVISION Shares

TEL AVIV, Israel--(Business Wire)--
Zohar Zisapel announced today the final results of his tender offer to purchase
5.0% of the outstanding ordinary shares of RADVISION Ltd. (Nasdaq: RVSN)
(currently, 971,394 RADVISION shares) for $7.70 per share, net to the seller in
cash, less any required withholding taxes and without interest. The offer
expired on June 25 at 10:00 a.m., New York time, or 5:00 p.m., Israel time.

As of the expiration date of the offer, based on the final results provided by
American Stock Transfer & Trust Company, the U.S. depositary of the offer, and
by Clal Finance Batucha Investment Management Ltd., the Israeli depositary of
the offer, 175,338 RADVISION shares, or approximately 0.9% of the outstanding
RADVISION shares, had been validly tendered and not withdrawn. The offer
included a statutory condition that RADVISION shares representing at least 5.0%
of the outstanding RADVISION shares be validly tendered and not withdrawn. The
minimum condition of the offer was not met and therefore none of the tendered
shares will be accepted. The tendered shares not previously withdrawn will be
returned promptly to their respective tendering shareholders.

About RADVISION: RADVISION is the industry`s leading provider of market-proven
products and technologies for unified visual communications over IP and 3G
networks. With its complete set of standards-based video networking
infrastructure and developer toolkits for voice, video, data and wireless
communications, RADVISION is driving the unified communications evolution by
combining the power of video, voice, data and wireless - for high definition
videoconferencing systems, innovative converged mobile services, and highly
scalable video-enabled desktop platforms on IP, 3G and emerging next-generation
networks. For more information about RADVISION, visit www.radvision.com.

About Zohar Zisapel: Mr. Zisapel served as the Chairman of the Board of
Directors of RADVISION from November 1992 until August 1999 and again assumed
that position in April 2001. During the last several years, Mr. Zisapel has been
engaged primarily in the management of high technology companies. Mr. Zisapel is
a founder and chairman of the board of directors of RAD Data Communication Ltd.
and he serves as a Chairman of other public companies, including RADCOM Ltd.,
Ceragon Networks Ltd. and as a director of Amdocs Ltd. Mr. Zisapel holds a B.Sc.
and M.SC. degrees from the Technion - Israel Institute of Technology and an MBA.
degree from Tel Aviv University.

Forward-Looking Statements: This press release may contain forward-looking
statements that are subject to risks and uncertainties. The accuracy of such
statements is subject to a number of risks, uncertainties and assumptions that
may cause actual results to differ materially from those projected, including,
but not limited to, general business conditions in the industry, changes in
demand for products, the timing and amount or cancellation of orders and other
risks detailed from time to time in RADVISION`s filings with the Securities
Exchange Commission, including its Annual Report on Form 20-F. These documents
contain and identify other important factors that could cause actual results to
differ materially from those contained in these forward-looking statements.
Shareholders and other readers are cautioned not to place undue reliance on
these forward-looking statements, which speak only as of the date on which they
are made. Mr. Zisapel undertakes no obligation to update publicly or revise any
forward-looking statement.

Goldfarb, Levy, Eran, Meiri, Tzafrir & Co.
2 Weizmann Street
Tel Aviv 64239, Israel
Telephone: +972-3-608-9999

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