RADVISION To Report Fourth Quarter 2005 Results on February 8

FAIR LAWN, New Jersey, January 4, 2006 -- RADVISION (Nasdaq: RVSN) today announced that it will report its 2005 fourth quarter financial results on Wednesday, February 8, 2006. 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 1-888-455-9744 (International dialers can call +1-210-234-0002) by 8:45 a.m. (Eastern) on February 8th.  The passcode “RADVISION” will be required to access the live conference call. A live webcast of the conference call also will be available in the Investor Relations section of the company's website at www.radvision.com and archived on the site until the next quarter.  Simply point to Corporate Information and click on Investors.

Boaz Raviv, Chief Executive Officer, and Tsipi Kagan, Chief Financial Officer, will review the quarter’s results and discuss the Company’s future outlook on the call.  Management will also 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 8th and remain on the site through the first quarter of 2006.

A replay of the call will be available beginning approximately one hour after the conclusion of the call through 11:59 p.m. (Eastern) on February 15th. To access the replay, please dial 1-800-568-4204 (International dialers can call +1-203-369-3290).

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.