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VTEL Announces Cost-Effective, Entry-Level H.323

Multipoint Conferencing Unit

RADVISION To Supply IP-Centric MCU For Easy Integration Into Enterprise LANs

AUSTIN, Texas and GLEN ROCK, New Jersey (November 12, 2002) – VTEL Products Corporation, a leading manufacturer of PC-integrated videoconferencing systems, and RADVISION (NASDAQ: RVSN), a leading provider of videoconferencing infrastructure solutions, today announced that the two companies have signed a multiunit agreement wherein VTEL will market a multipoint conferencing unit (MCU) from RADVISION that provides an unparalleled cost-effective, feature-rich MCU designed for small enterprises that need to connect a limited number of videoconferencing endpoints.  MCUs are devices that allow three or more locations to join together in the same videoconference.  The product, called the MCU VI, is based on RADVISION technology and was customized for VTEL by RADVISION. 

The VTEL MCU VI will allow up to six videoconferencing endpoints, each operating at up to 384 Kbps, to connect in a single videoconference.  The product includes continuous presence capability (in which the video from four locations appears on the same screen), an embedded Gatekeeper, and a built-in audio transcoder. 

“VTEL is the world leader in deploying IP-centric video networks for education, government, and corporate enterprises, and our customers told us that they need a powerful yet affordable MCU,” said Bob Swem, VTEL President and CEO.  “In looking for a low-cost, feature-rich platform for small enterprises to roll out multipoint conferencing services, we tapped RADVISION to provide this expertise.”

“RADVISION is the pioneer of solutions for real-time video and data communications over packet networks, and VTEL has been deploying large-scale Internet Protocol videoconferencing networks since 1999.  It was natural that our two companies would work together to develop the MCU VI, “said Yotam Raz, General Manager for U.S. Operations of RADVISION’s Networking Business Unit.  “VTEL has been a reseller of RADVISION network products for years, and we are delighted that VTEL came to us for the MCU VI,” commented Raz.

“Our customers asked us for an affordable MCU that was not tied to a particular endpoint,” said Dan Nix, VTEL Executive Vice President.  “The MCU VI is a stand-alone network resource.  That’s an important distinction between the MCU VI and an embedded MCU.  With an MCU that is embedded in an endpoint, whenever you want to use the MCU, you have to use that endpoint.  Or, if that endpoint is being used, its embedded MCU is not available to anyone else.  The MCU VI is an independent MCU that can connect any H.323 videoconferencing system on the network.  It is really easy to start an ad hoc multipoint conference, or add other endpoints to a conference that’s already going,” explained Nix.

VTEL will begin shipping the MCU VI in December through its worldwide network of value-added resellers.

About VTEL Products Corporation

Based in Austin, Texas, VTEL Products Corporation is a leading provider of PC-integrated video communication endpoints, video network management software, multipoint conferencing systems, and network access solutions to education, government, and corporate enterprise customers worldwide.  Visit the VTEL website at www.vtel.com.

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.  RADVISION has two distinct business units.  RADVISION’s Networking Business Unit (NBU) offers one of the broadest and most complete sets of videoconferencing network solutions for IP- and ISDN-based networks, supporting all end points in the industry.  The company also provides businesses and service providers with integrated solutions that deliver converged IP-based video telephony applications to employee computer desktops and residential broadband homes worldwide. The Company’s Technology Business Unit (TBU) provides protocol development tools and platforms, enabling equipment vendors and service providers to develop and deploy new converged networks, services, and technologies.  For more information please visit our website at 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 10-K 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. RADVISION undertakes no obligation to update publicly or revise any forward-looking statement.