RADVISION : Enters New Strategic Partnership with Microsoft

RADVISION's Global Partner Forum--RADVISION® Ltd. (Nasdaq: RVSN), a leading technology and end-to-end solution provider for unified visual communications including video network infrastructure, developer tools and high definition (HD) room, desktop and mobile video conferencing systems, today announced a new strategic relationship with Microsoft Corp. to deliver advanced integration to Microsoft's unified communication (UC) solutions. The relationship was announced at RADVISION's Global Partner Forum and highlighted in a keynote presentation by Warren Barkley, General Manager of the Lync Partner and Customer Group at Microsoft.

RADVISION and Microsoft share the vision of seamless interoperability between all visual communication devices to fully realize the potential of unified communications. With this agreement, RADVISION will develop a powerful combination of hardware and software solutions integrated with Microsoft Lync, which will be offered through joint marketing and sales initiatives. Customers and prospects will be able to realize the benefits of Microsoft's UC solutions in conjunction with their current investments in standards-based video conferencing and new visual communication solutions such as telepresence and mobile video.

Through this agreement, RADVISION will provide advanced connectivity between the Microsoft unified communication platform and standards-based video conferencing solutions extending the video capabilities throughout the enterprise. Both RADVISION and Microsoft will invest resources and have stakes in development, sales and marketing of the joint solution. Customers will have access to innovative communications capabilities leveraging the unique expertise of both companies resulting in higher productivity and lower costs of doing business.

?Gartner estimates that there were more than 1.5 million room-based video conferencing endpoints in circulation by 2009¹,? said Scott Morrison, Research Vice President at Gartner. ?Vendors that do not include video in a coherent UC platform road map are less likely to succeed in the long term. Those that meet the UC needs of their customers are more likely to be able to ?lock in' video as part of their UC capabilities.?

"Microsoft and RADVISION bring customers an interoperable UC solution that allows users to merge their choice of HD video conferencing and telepresence systems with the simplicity of UC at the desktop," said Warren Barkley of Microsoft. "With the Microsoft and RADVISION solutions, customers can have confidence that their existing and new investments in video communications will interoperate within the UC environment.?

?RADVISION has a long history of providing advanced video conferencing and connectivity capabilities to Microsoft's real time communications platforms,? said Boaz Raviv, Chief Executive Officer of RADVISION. ?Through this latest initiative, RADVISION and Microsoft will bring together the winning combination of solution features and benefits requested by the market today.?

¹ Gartner Research - Predicts 2010: Video, Cloud and UC Services Loom Large in Enterprise Communications, December 2009

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 communications solutions 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, our ability to integrate the Aethra video assets into our product offerings, 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.

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