RADVISIONâ??s patent essential to reducing call setup time for 3G video telephony capable devices

TEL AVIV (December 18, 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 it has been granted a U.S. patent, numbered 7464167, for reducing 3G video call connect time to under one second.

Until approximately two years ago, it took 7 to 15 seconds to connect a 3G call and start sending video. This time delay is considered far too long for a commercially viable service. Recently, an extension to the 3G-324M protocol (annex K) was ratified by the International Telecommunications Union (ITU) and the 3GPP to reduce call setup time.

This extension, known as MONA, was defined by RADVISION and other industry players. The MONA specification is designed around a set of three different techniques, which may be used during call setup procedures to shorten the time necessary to setup a video call.

“Until now, the widespread adoption of 3G video telephony has been hampered by the time it takes to set up calls between devices,” said Avishai Sharlin, General Manager, TBU, at RADVISION. “With the innovation added by MONA, call setup times can be reduced to below a second, significantly improving the quality of experience to the end user.”

“RADVISION is committed to facilitating the proliferation of multimedia communications through IP technology and solutions,” said Mr. Sharlin, adding that, “RADVISION’s IP will be made available to entities at reasonable and non discriminatory licensing terms.”

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 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.

Source: RADVISION