RADVISION (Nasdaq: RVSN) reported today that Yehuda Zisapel, a former Chairman of the Board of RADVISION, and the brother of the Companyâ??s current Chairman of the Board, purchased 178,143 shares of the Companyâ??s common stock through his wholly-owned company RADbit Inc. in the open market during

TEL AVIV (November 19, 2007) –

RADVISION (Nasdaq: RVSN) reported today that Yehuda Zisapel, a former Chairman of the Board of RADVISION, and the brother of the Company’s current Chairman of the Board, purchased 178,143 shares of the Company’s common stock through his wholly-owned company RADbit Inc. in the open market during the last five days. The total amount invested by Mr. Zisapel for those shares was approximately $2.0 million.

About RADVISION

RADVISION (NASDAQ: RVSN) is the industry’s leading provider of market-proven products and technologies for unified visual communications over IP, 3G and IMS 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 video conferencing systems, innovative converged mobile services, and highly scalable video-enabled desktop platforms on IP, 3G and emerging next-generation IMS networks. For more information about RADVISION, visit www.radvision.com.

This press release contains forward-looking statements that are subject to risks and uncertainties. Factors that could cause actual results to differ materially from these forward-looking statements include, but are 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 RADVISION’s Form 20-F Annual Report. These documents contain and identify other important factors that could cause actual results to differ materially from those contained in our projections or forward-looking statements. Stockholders 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. We undertake no obligation to update publicly or revise any forward-looking statement.

Source: RADVISION