RADVISIONâ??s SCOPIA Solution for IBM Lotus Sametime to be Demonstrated at IBM Lotusphere

LOTUSPHERE, ORLANDO, FL and TEL AVIV (January 21, 2008) –

RADVISION® Ltd. (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 its SCOPIA Conferencing Platform will support IBM Lotus Sametime.

RADVISION’s SCOPIA Conferencing Platform with SCOPIA Desktop will bring advanced conferencing capability to IBM’s next generation unified communications and collaboration platform enhancing the instant messaging and conferencing capabilities of Lotus Sametime by enabling users to create and initiate multiparty audio and video conferences directly from within Lotus Sametime. By adding RADVISION’s unique video and audio plug-in to Lotus Sametime, users can easily escalate Lotus Sametime instant messaging chat sessions into full multiparty audio and video sessions on their PC and extend those conferences to other devices such as room based video conferencing systems, 3G videophones or virtually any telephone available today.

SCOPIA Conferencing Platform’s high definition capabilities allow mixed conferences of HD video conferencing systems, standard definition video systems and video from desktops in the same call without requiring all participants to downgrade to their common capabilities. Each user participates in the conference at the highest capability available to them. SCOPIA provides the most affordable and flexible platform in the market with support for HD, standard definition, desktop, and 3G in a single solution with pricing and capacity optimized for each conferencing application.

SCOPIA Desktop builds upon the technology of RADVISION’s Click to Meet solution for Lotus Sametime with the enhanced HD and high performance media processing capabilities of the SCOPIA Conferencing Platform underneath. These new capabilities provide a high quality conferencing experience even with limited bandwidth applications when viewing multiple participants simultaneously within Sametime.

“Integrating the advanced media processing capabilities of the SCOPIA Conferencing Platform into Lotus Sametime brings another dimension of conferencing to the Sametime unified communications environment,” said Bob Romano, Vice President Enterprise Marketing. “Now Sametime users can have mixed conferences with virtually any type of device including the latest High Definition products on the market without requiring any of those devices to sacrifice quality.”

RADVISION will be demonstrating the SCOPIA Conferencing Platform for Lotus Sametime at the Lotusphere 2008 Product Showcase in Orlando – booth 302 opening today.

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 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.

The names of actual companies and products mentioned herein may be the trademarks of their respective owners. IBM, Lotus and Sametime are trademarks of International Business Machines Corporation in the United States, other countries or both.

Source: RADVISION