FAIR LAWN, New Jersey, November 30, 2006 -- RADVISION LTD. (Nasdaq: RVSN), a leading provider of voice and video network infrastructure and developer tools for unified visual communications over IP, 3G, and emerging next-generation networks, today announced that CESTEL, a major Spanish system integrator for the media and call center industry, has chosen RADVISION’s Interactive Video Platform to incorporate advanced video capabilities to its contact center and IVR  solutions.

RADVISION’s powerful development platform offers an intuitive, smooth migration path from audio-based contact centers and IVR systems to video-enhanced solutions. The IMS-ready Interactive Video Platform enables rapid development and deployment of multiple video applications that can be run concurrently. This allows CESTEL to leverage a one-time infrastructure investment and enables delivery of carrier-class solutions that enhance the consumer experience.

With the addition of a video layer on existing premium number voice services, such as traffic updates, weather, banking and more, CESTEL clients can offer enhanced video-enabled services to consumers in conjunction with legacy voice services.

“Several leading customers are enthusiastic about the performance of the platform based on initial deployment results,” said Mr. Fernando Ortiz Cestel, CEO. “Our customers not only expect to receive the same high quality when video is added, they also expect to leverage existing legacy equipment and transition smoothly to the world of video. RADVISION’s flexible APIs and robust development platform allow them to do that.”

"Our collaboration with CESTEL further proves that interactive video services for the mobile and contact center markets offer real revenue-generating opportunities,” said Alon Barnea, General Manager of RADVISION’s Mobility & Service Provider Business Unit. “CESTEL’s video-enhanced IVRs deployed throughout Spain are an important milestone towards widely-deployed interactive multimedia services – further validating the transformation from visionary ideas to real business solutions using interactive video.”

About RADVISION

RADVISION (Nasdaq: RVSN) is the industry’s leading provider of market-proven products and technologies for unified visual communications over IP and 3G 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 videoconferencing systems, innovative services on converged IP and 3G networks, and highly scalable video-enabled desktop platforms for IP and emerging next-generation networks. For more information about RADVISION, visit www.radvision.com.

About CESTEL

CESTEL (Centro Español de Servicios Telemáticos S.A.),  a the leading system integrator for various industries in Spain established in 1988,  provides telecommunications and IT services to its customers – banks and insurance companies, utilities and public administration. Cestel’s areas of expertise include Internet-related services and Computer-Telephony Integration (CTI). Cestel integrates IT systems and telecommunications in order to improve its customers’ service levels and reduce operating costs.
For more information about Cestel, please visit http://www.cestel.es.

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.