RADVISION Real-Time 3G Video Information Solution is Part of Hutchison 3G Austria Network Deployment; Advanced Video Services Platform Enables Interactive Streaming of Internet-Based Multimedia Content to 3G Video Devices.

FAIR LAWN, N.J. -- RADVISION (Nasdaq: RVSN) today announced that Hutchison 3G Austria, operating in the market under the brand "3," is using RADVISION's SCOPIA(TM) advanced video services platform as a key network component in 3's WCDMA 3G network to enable advanced visual information and entertainment services.

Hutchison 3G Austria is a wholly-owned subsidiary of Hutchison Whampoa Limited ("HWL"). Based in Hong Kong, HWL was granted an UMTS license in November 2000 to operate third generation mobile services in Austria and, in May 2003, Hutchison 3G Austria launched the first purely mobile multimedia service in the Austrian market under the brand "3". Since the launch date the Company has already acquired more than 240,000 "3" customers (as of March 30, 2005).

"3 is the ideal model for the convergence of telecommunication, Internet and classic media over broadband mobile - providing innovative multimedia products and services for mobile usage (e.g. video call, video information services, etc.) and conventional mobile communication services (e.g. voice calls, SMS, MMS) in a single device," said Boaz Raviv, General Manager of RADVISION's Network Business Unit. "Interactive information services based on real-time streaming of live and stored video content over the 3G-324M network protocol, are of course a crucial component of this next-generation architecture. We are proud that our solution is playing a key role in enabling the delivery of these services while at the same time paving the way for deployment of additional services such as video telephony and other video applications."

Berthold Thoma, CEO of Hutchison 3G Austria, declared: "By partnering with some of the most innovative companies, 3 is delivering superior visual services to its customers. By working with RADVISION and building our video information service around the SCOPIA(TM) solution, we will be able to offer our Austrian customers high-quality, easy-to-use video services on their 3G Mobile."

The RADVISION SCOPIA(TM) advanced video services platform supports interactive real time video services from IP-based end points (over RTSP or Real Time Streaming Protocol) and 3G-324M-enabled handsets. This solution complements RADVISION's already popular SCOPIA(TM) 3G video gateway solution, which integrates 3G-324M enabled mobile video phones and PDAs with IP-based (SIP and H.323-based) video end points. The platform also enables mobile videophones to utilize additional resources on the IP network including multipoint conferencing bridges to host three or more parties in a single session, voice and video gatekeepers, and terminals.

RADVISION noted that a portion of the proceeds from the transaction with Hutchison 3G Austria was recognized in prior quarters.

About RADVISION Carrier Solutions

RADVISION has a twelve year track record in pioneering multimedia communications and conferencing solutions for the services provider market - both IP wireline and more recently broadband wireless. The company offers infrastructure, developer toolkits, and professional services for equipment developers and service providers to develop and/or offer their customers a wide variety of high-revenue multimedia solutions and services including: IP telephony, point-to-point and multipoint video telephony, wireless to landline (IP) video connectivity services, group video chats and videoconferencing, residential video telephony, broadband remote surveillance/monitoring, 3G video streaming and video mail connectivity.

About RADVISION

RADVISION LTD. (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.

About 3:

Hutchison 3G Austria is a wholly owned subsidiary of Hutchison Whampoa Limited ("HWL"). Based in Hong Kong, HWL has been granted an UMTS license in November 2000 to operate third generation mobile services in Austria. In May 2003, Hutchison 3G Austria launched the first purely mobile multimedia in the Austrian market under the brand "3" and has already acquired the status of UMTS market leader with a total of 240,000 customers (as of March 2005). 3 is a convergence of telecommunication, internet and classic media, providing innovative multimedia products and services for mobile usage (e.g. video call, video clips, etc.) and conventional mobile communication services (e.g. voice calls, SMS, MMS).

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.