Presentation to be webcast and archived

TEL AVIV (September 02, 2009) –

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, announced today that Adi Sfadia, Chief Financial Officer, and Robert Romano, Vice President of Enterprise Marketing, will speak at the Kaufman Bros. 12th Annual Investor Conference in New York City on Wednesday, September 9th, from 11:30 a.m. to 12 noon (Eastern).

A live webcast of the Company’s presentation can be accessed at www.wsw.com/webcast/kbro15/rvsn and on the Investor Events page of the RADVISION web site at http://www.radvision.com/ or by clicking on the following link: http://www.radvision.com/InvestorEvents/KB2009.

A replay of the event will be available on the RADVISION web site approximately three hours after the live event and accessible for ninety days.

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. To gain additional insights into our products, technology and opinions, visit blog.radvision.com. For more information about RADVISION, visit http://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