RADVISION To Report Fourth Quarter 2004 Results on February 2

    Business Editors/High-Tech Editors

    FAIR LAWN, N.J.--(BUSINESS WIRE)--Jan. 5, 2005--RADVISION (Nasdaq: RVSN) today announced that it will report its fourth quarter financial results on Wednesday, February 2, 2005. The press release will be issued at approximately 7:00 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 1-888-730-9134 (International dialers can call +1-210-234-8000) by 8:45 a.m. (Eastern) on February 2nd. 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.
    Gadi Tamari, 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 2nd and remain on the site through the first quarter of 2005.
    A replay of the call will be available beginning approximately one hour after the conclusion of the call through 11:00 p.m. (Eastern) on February 9th. To access the replay, please dial 1-888-282-0029 (International dialers can call +1-402-998-0514).

    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.

--30--TB/ny*

CONTACT: RADVISION Tsipi Kagan, 201-689-6340 cfo@radvision.com or Peter Benedict, 201-689-6311 pr@radvision.com or Comm-Partners LLC Investor Relations: June Filingeri, 203-972-0186 junefil@optonline.net

KEYWORD: NEW JERSEY INDUSTRY KEYWORD: TELECOMMUNICATIONS NETWORKING HARDWARE SOFTWARE COMPUTERS/ELECTRONICS CONFERENCE CALLS EARNINGS SOURCE: RADVISION

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