RADVISIONâ??s SIP Developer Suite to be part of Wind Riverâ??s software ecosystem to help customers accelerate product deployments

Tel Aviv (May 28, 2009) –

RADVISION® (Nasdaq:RVSN), a leading provider of video network infrastructure and developer tools for unified visual communications over Internet Protocol (IP) networks, 3G and emerging next-generation IP Multimedia Subsystem (IMS) networks, today announced that it was selected to be part of the recently announced Wind River Partner Validation Program. As a partner, RADVISION will provide its validated, award-winning SIP Developer Suite based on Wind River’s industry leading operating systems (VxWorks and Wind River Linux) and partner technologies critical to telecom and networking equipment providers.

The program addresses the growing need for commercial software to play a critical role in emerging next-generation networks. RADVISION and Wind River will focus on providing pre-integrated platform solutions for infrastructure equipment being developed for broadband wireless, wireline and enterprise networks. These growth segments include 3G, Long Term Evolution (LTE), Femtocell Gateway, WiMax, Metro Ethernet, IP Multimedia Subsystem (IMS), Internet Protocol Television (IPTV) and enterprise data.

RADVISION will validate its software development solutions and provide testing and commercial support to customers. The primary benefits of such pre-validated solutions are that customers can reduce development, integration, and quality assurance efforts and thereby reduce overall risk while accelerating time-to-market.

“Wind River’s partner validation program directly addresses the increasingly important business issues of time-to-market and R&D cost savings among our customers,” said Mike Langlois, General Manager, Networking and Telecom Industry, Wind River. “As part of our efforts to define and enable the networking industry’s software reference platforms, Wind River has hand selected industry leading commercial software companies like RADVISION to create a preferred strategic relationship with Wind River. This is significant because now our customers can spend significantly less time and effort integrating software components to create a carrier-grade product.”

“We are honored to be part of such an ambitious and exciting endeavor,” said Avishai Sharlin, General Manager of RADVISION’s Technology Business Unit. “Our SIP Developer Suite, a highly versatile set of tools to accelerate SIP application development, will assist developers using Wind River operating systems to reach markets faster, and embed best-of-breed multimedia functionality in their products.”

More information about the Wind River Partner Validation Program and solutions for telecom and networking equipment providers is available at http://www.windriver.com/partner-validation/.

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 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