RADVISION's Server Platform Tapped by Leading Telecommunications Provider to Develop IP Networking Applications.

FAIR LAWN, N.J. -- UP Technologies (China) Co. Ltd. Selects RADVISION's SIP Server Platform to Quickly Provide Presence Capabilities Across UP Technologies' IP Network Product Line

RADVISION (Nasdaq:RVSN) today announced that UP Technologies Co. Ltd. (UPTech) is using RADVISION's Session Initiated Protocol (SIP) Server platform to develop presence applications for instant messaging solutions in its UU line of Internet Protocol (IP) network products.

UPTech is a leading telecommunications solutions provider in China specializing in providing next-generation platforms that work with Internet networks as well as with existing public switched telephone networks (PSTN) and mobile networks. With its uPass(TM) system, UPTech combines new and existing services over a single IP infrastructure. The UU multimedia instant messaging product line is built on the uPass system and includes seamless Internet-Mobile-PSTN voice messaging tools for enterprise as well as personal users.

RADVISION's SIP Server Platform greatly simplifies and accelerates product development by providing a standards-compliant, robust and high performance implementation of SIP server functionality controlled through a multi-level, intuitive application program interface (API). UPTech licensed the RADVISION SIP Server Platform as well as options including the Back-to-Back User Agent (B2BUA) and Event server modules on Linux.

"We selected RADVISION because of its reputation and the proven capabilities of its SIP Server Platform," said Mr. Hou Limin, Chief Technology Officer of UPTech. "Our goal was to provide reliable, seamless integrated IP services within the UU product line. Features such as an extremely user-friendly API and the B2BUA and Event Server components in the RADVISION platform made it easier for our designers to quickly and confidently deploy our UU line of multimedia instant messaging products."

Time to market and reliability are two key drivers when developing products for the IP market. By using the SIP Server Platform from RADVISION, UPTech was able to quickly develop a standards-compliant, Linux-based SIP server for reliably handling its UU Service subscription requests, provide notification of network status changes, and serve as an application interface to implement SIP events. The B2BUA component enabled them to reliably control the routing and connection of calls.

"We are very pleased that UPTech has chosen RADVISION products to implement its comprehensive line of IP products," said Adi Paz, Sr. Director of Product Management and Marketing for RADVISION's Technology Business Unit. "This type of application is where the RADVISION platforms and toolkits excel because our customers can skip costly development and maintenance steps, ensure reliability, speed up time to market, and subsequently gain significant competitive advantages when developing IP communications and networking solutions."

RADVISION's SIP Server Platform provides a complete framework for developing all types of SIP Server applications including proxies, redirect servers, registrars, presence servers and different types of B2BUAs. Network servers, such as the ones developed by UPTech, are essential network elements that make it possible for endpoints to communicate with each other by exchanging messages, registering user location, and seamlessly moving between networks. Servers can also provide enhanced functionality such as serving media, presence, applications, and event notification.

About RADVISION Developer Solutions

RADVISION's complete range of developer solutions, consisting of protocol toolkits and platforms, embedded frameworks, professional services, and automated testing tools, is designed based on a thorough comprehension of the developer's needs. The company's goal is to enable shorter time to market of robust, standards-compliant rich media applications. With the largest customer base in the industry and a long-standing record of market leadership, RADVISION provides a unique package of award-winning technology, accumulated experience, and established expertise. RADVISION developer solutions address the full development cycle for rich media products, services, and solutions over the entire range of communication infrastructures (Broadband, 3G, WiFi, and WiMax).

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 UP Technologies Co. Ltd.

UP Technologies (China) Co. Ltd. (UP Tech) is a start-up company funded by top-tier venture capitalists in February 2003. Headquartered in Beijing, UP Tech has a presence in both the US and China, with two state-of-the-art R&D centers in Beijing and Shenzhen. These strategic locations provide ideal settings for R&D and manufacturing for the company's ODM/OEM customers around the globe. The company focuses on developing product solutions and ODM platforms under the brand of uPass, a concept of providing new and existing telecom and information services over the IP infrastructure. With an experienced R&D team, seasoned management, strong financial backing, and established channels to the China market, UP Tech aims to become a leading IP communications company in the world.

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.