Philippe Besseyre des Horts Appointed Head of RADVISIONâ??s Europe, Middle East and Africa Operations, Overseeing Regional Sales to the Developer, Enterprise and Service Provider Markets

TEL AVIV (August 22, 2007) –

RADVISION (Nasdaq: RVSN), a leading provider of video network infrastructure and developer tools for unified visual communications over IP, 3G, and emerging next-generation IMS networks, today announced that Philippe Besseyre des Horts has been named General Manager of RADVISION’s European, Middle East and Africa (EMEA) operations. With over 20 years of experience in the service provider arena, Mr. Besseyre des Horts will be responsible for expanding RADVISION’s sales networks and revenues throughout Europe, the Middle East and Africa. He will oversee regional sales to the developer, enterprise and service provider markets, and undertake full responsibility for field marketing and support teams.

Mr. Besseyre des Horts’ experience in the global telecommunications market includes serving as Vice President for Sales at NetCentrex/Comverse IP Converged Communications line of business. Prior to this, he served as EMEA General Manager for Array Networks, a Web security and traffic management appliance company where he managed indirect channels for sales to major corporations and Telcos. Between 1998 and 2002, Mr. Besseyre des Horts was Country Sales Director in France for Level 3 Communications, and Vice President Worldwide Sales Operations, based in Broomfield, Colorado. Before joining Level 3, Mr. Besseyre des Horts worked with British Telecom France and British Telecom Europe as Sales Manager, Carrier Sales Director Europe and Country Sales Director. He began his career in the telecom industry with McDonnell Douglas Information Systems.

“RADVISION will benefit greatly from Philippe’s vast experience in the service provider arena in general, and with next generation platforms, in particular,” said Boaz Raviv, RADVISION CEO. “He is a seasoned executive in our dynamic industry, with strong managerial and leadership qualities. I am confident that his skills and experience, together with his enthusiasm, will guide our EMEA team to new levels of activity, especially in the growing service provider market.”

Philippe Besseyre des Horts noted, “RADVISION’s success lies in the synergy between its product lines, and the strength this offers strategic channel partnerships. My objectives are to deepen our ties in the growing mobile area and to develop stronger relationships with channel partners and OEMS throughout the region.”

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