RADVISIONâ??s participation in the IMS Forum PlugFest III is further testimony to its commitment to IMS interoperability

TEL AVIV (October 30, 2007) –

RADVISION (Nasdaq: RVSN), a leading provider of video network infrastructure and developer tools for unified visual communications over IP, 3G, and emerging next-generation IMS networks, today announced that it participated in the IMS Forum’s IMS Plugfest(TM) III interoperability test event held on October 15-19 at the IMS Interoperability Lab at UNH. RADVISION successfully tested the following products at the event: IMS DIAMETER Toolkit, IMS MEGACO/H.248 Toolkit, and the ProLab(TM) IMS Testing Solution.

“, the complete IMS Developer Suite, offers a comprehensive package for developers. All RADVISION tools and stacks place specific emphasis on IOT, which we consider essential for the industry,” says Sagi Subocki, IMS Product Manager for RADVISION’s Technology Business Unit. “RADVISION is committed to standards compliance, and our IMS tools and testing solutions play a vital role in the industry-wide adoption of IMS architecture. We were honored to participate in the IMS PlugFest III and help vendors achieve new levels of interoperability.”
The IMS Forum’s IMS Plugfest III is the third in a series of events designed to foster interoperability and certification for IMS services and applications. IMS Plugfests allow service providers to quickly realize revenue from their IMS investments by significantly reducing the time to market for new services and applications.
“RADVISION has a long tradition and is a leader in interoperability among telecom vendors,” said Michael Khalilian, Chairman and President of the IMS Forum. “IMS protocol stacks are an essential building block and a prerequisite for successful IMS deployment. We were happy to have RADVISION with us again at the IMS Plugfest III.”
Plugfest III, “A Network of Services” focused on realizing applications and services delivered over the IMS and NGN network:

* VoIP, Instant Messaging, and FMC
* Video and Multimedia
* Services for Businesses and Unified Communications
* User and Application Profile Handling
* Security, Reliability and Robustness Testing for IMS Services

RADVISION’s IMS Express(TM), the complete IMS Development Suite includes all the necessary signaling and media protocols to easily and cost-effectively meet the IMS challenge.

* IMS MEGACO/H.248 Toolkit
* IMS DIAMETER Toolkit
* IMS Advanced-RTP/RTCP Toolkit

* IMS Client Suite
* ProLab(TM) IMS Testing Solution
* IMS Server Platform

About RADVISION

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

About the IMS Forum

The IMS Forum® is a global, non-profit industry association devoted to interoperable IP Multimedia Subsystems and NGN services and solutions. IMS Forum’s mission is to accelerate the interoperability of IMS applications and services, enabling enterprise and residential consumers to quickly benefit from the delivery of quadruple play voice, video, internet and mobile content over broadband cable, wireless and fixed networks. The IMS Forum is the initiator and organizer of IMS Plugfest(TM), the industry’s only event focused on IMS services interoperability verification and certification.

Through its Plugfests, working group interaction, and other activities, forum members are able to develop cost-effective multi service delivery platforms for IP services over wireline, cable, 3G, WiFi and WiMAX networks. For additional information or to join the IMS Forum and the IMS Plugfest, please visit http://www.imsforum.org/.
For Further Information contact:
IMS Forum PR
Cathy Clarke
CNC Associates
617-527-2089
PR@IMSForum.org

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.

Source: RADVISION