VisualOn and RADVISION collaborate on mobile IMS and 3G communication technology to provide complete solutions for mobile handset vendors

Campbell, CA (March 04, 2008) –

isualOn, a mobile software developer, has partnered with RADVISION (Nasdaq:RVSN), a leading provider of products and technologies for unified visual communications over IP and 3G networks to provide a complete solution set of fully featured signaling and media applications for mobile phone developers. VisualOn’s highly optimized codecs are driving the media processing for RADVISION’s IMS Video Share Application and 3G VT Application.

“VisualOn provides state-of-the-art video codecs which are highly optimized for quality and performance on mobile handsets,” said Tsahi Levent-Levi, Product Manager for RADVISION’s Technology Business Unit. “By teaming up with VisualOn, we can now provide our customers with a one-stop shop solution for mobile multimedia communication applications.”

“RADVISION has a strong portfolio of mobile communications applications and we believe our codecs are a natural fit with their technology. Now developers can seamlessly integrate applications that offer the highest quality IMS and 3G capabilities powered and enhanced by VisualOn mobile multimedia software technology,” said Sean Torsney, Vice President of Sales and Marketing for VisualOn. “VisualOn’s partnership with RADVISION will allow customers to deal with today’s competitive pressures quickly.”

RADVISION’s IMS Video Share Application and 3G VT Application provide high level frameworks enabling developers to rapidly add video sharing and video telephony capabilities to their mobile handsets with the complete user interface already included. Coupled with VisualOn software codecs, these products provide a full enabling technology framework covering call control, signaling and media processing all in a unified package that integrates both technology and commercial licensing aspects.

About VisualOn

VisualOn, Inc. is a Silicon Valley based mobile software company that enables a rich multimedia experience on handheld devices without the need for expensive hardware. VisualOn’s unique patent pending technology is optimized for quality, performance and minimal power consumption. VisualOn supports many video and audio applications, including mobile TV, with quality levels that rival the iPhone. VisualOn’s software offerings include support for H.264 and other popular audio and video formats. Our solutions are available as plug-ins for Windows Media Player or as SDKs for integration with third-party applications. For more information, please visit http://www.visualon.com.

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 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