RADVISION and Microsoft Team to Enable Quick and Easy Videoconferencing for 3G.

FAIR LAWN, N.J. -- RADVISION LTD. (Nasdaq: RVSN)

--Teaming RADVISION's award-winning Click To Meet(TM) with Microsoft(R) Office Live Communications Server results in high-quality voice and video conference calls at the click of a mouse, whether participants access the call using desktops, PDAs, or 3G mobile phones.

RADVISION LTD. (Nasdaq: RVSN), a leading provider of multimedia conferencing and communications platforms, has announced that it will team with Microsoft(R) to jointly demonstrate multimedia visual communications connectivity between Click to Meet(TM) for Microsoft Office Live Communications Server and 3G mobile devices at the 3G World Congress and Exhibition 2005, being held November 16 through 18 at the Hong Kong Convention and Exhibition Centre.

Recently named Best of Microsoft Tech-Ed 2005 in Europe, RADVISION's Click to Meet significantly extends the conferencing capabilities of LCS and Office Communicator by enabling participants in an Instant Messaging session to easily and seamlessly move to a full multi-party audio, video, and data videoconference simply by clicking on a "Start Conference" button.

"Click to Meet is an innovative product that works seamlessly with Microsoft Office Live Communications Server 2005, and fully supports all of our new and existing conference control capabilities in Microsoft Office Communicator," said Peter de Zoete, Director of Marketing & Sales, Real-time Collaboration Product Group, Microsoft, Greater China. "Our customers tell us that RADVISION's Click to Meet is a quick, easy way for them to boost productivity and dramatically improve communications, especially among remotely located team members."

"Having participated in the Microsoft Office Live Communications Server 2005 launch earlier this year in APAC, we are pleased to be joining forces again with Microsoft to jointly demonstrate our products," said Eitan Livne, General Manager of RADVISION Asia Pacific. "Our combined solution enables on-the-fly multiparty videoconferencing, right from the user's desktop or mobile device, and, by using market proven technology, our users can do it with confidence."

Visit booth #1731 at the 3G World Congress and Exhibition 2005, being held November 16 through 18 at the Hong Kong Convention and Exhibition Centre, to see a demonstration of Click to Meet(TM) for Microsoft Office Live Communications Server.

Availability

RADVISION's Click to Meet products, including Click to Meet for Microsoft Office Live Communications Server are available now.

About RADVISION

RADVISION (Nasdaq: RVSN) is the industry's leading provider of high quality, scalable and easy-to-use products and technologies for videoconferencing, video telephony, and the development of converged voice, video and data over IP and 3G networks. For more information please visit our website at 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.