RADVISION (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, will report its financial results for the fourth quarter of 2008 on Thursday, February 5, 2009. The press release

TEL AVIV (January 06, 2009) –

RADVISION (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, will report its financial results for the fourth quarter of 2008 on Thursday, February 5, 2009. The press release will be issued at approximately 8:00 a.m. (Eastern).

A conference call has been scheduled for 9:00 a.m. (Eastern) on that same day. To access the conference call, please dial 1-877-601-3546 (International dialers may call +1-210-839-8500) by 8:45 a.m. (Eastern) on February 5th. The passcode “RADVISION” will be required to access the live conference call. A live webcast of the conference call also will be available on the Company’s website and archived on the site until the next quarter. Simply click on the following link or copy it onto your browser: www.radvision.com/Corporate/Investors/FinancialReports/.

Boaz Raviv, Chief Executive Officer, and Adi Sfadia, Chief Financial Officer, will review the quarter’s results and discuss the Company’s outlook on the call. Management also will be available for questions from the investment community.

A PowerPoint presentation highlighting key financial metrics will be available in the Investor Relations section of the company’s website, www.radvision.com/. The presentation will be available beginning at 8:00 a.m. (Eastern) on February 5th and remain on the site through the first quarter of 2009.

A replay of the call will be available beginning approximately one hour after the conclusion of the call through 10:59 p.m. (Eastern) on February 11th. To access the replay, please dial 1-888-568-0915 (International dialers may call +1-402-998-1592).

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/.

Source: RADVISION