Football heroes greet troops over high definition video link from Phoenix to Fort Lewis, Washington

Phoenix, Ariz. and Fort Lewis, Wash., (January 31, 2008) –

LifeSize Communications, the global leader in high definition video communications, and RADVISION® Ltd. (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, will connect NFL stars in Phoenix and U.S. Army soldiers stationed at Fort Lewis, Washington during Super Bowl XLII using high definition video communication systems. The real-time video greetings are part of NFL Charities Super Bowl XLII Community Impact Program.

“Even football stars have heroes, and the players have tremendous respect for our nation’s men and women in uniform, said Coach Charles Hatcher, head of Champions 4 Champions, who organized the event through NFL Charities. “This is the first time we’ll be using a high definition link to connect the players with some of their favorite fans, many of whom will soon be deploying overseas into combat zones. It’s a chance for the players to give back to the people who preserve our freedom.”

LifeSize CEO Craig Malloy, a Navy veteran, appreciates the NFL’s support for American troops. “LifeSize is thrilled to be a part of the Super Bowl pregame activities, and it’s exciting to see our products bring football legends and U.S. soldiers together.”

“RADVISION is honored to have its technology provide a great experience by making soldiers feel as if they are in the same room with players,” said Boaz Raviv, RADVISION CEO. “Our video communications products deliver on the promise of bringing together geographically dispersed parties and making them feel as if they are literally within arm’s reach.”

“We have a full roster of NFL legends participating in our Super Bowl NFL Charities events, and every athlete I’ve spoken with is looking forward for the chance to pay their respects to the troops,” said Nick Nicolosi, tournament director for the third annual Super Bowl NFL Charities Celebrity Bowling Classic and the 23rd annual Super Bowl NFL Charities Celebrity Golf Classic.

High definition video delivers a rich, interactive experience, with clear images, fluid motion and rich audio that makes you feel as if you are having a face-to-face conversation without having to travel. LifeSize and RADVISION equipment has also connected military families at home in the United States with their loved ones serving overseas during the holidays.

The video calls will be made from various locations in Phoenix during Super Bowl pregame events to connect soldiers at Fort Lewis’ on-post recreation centers. Live greetings from NFL legends and Hall of Fame players will be exchanged on location Thursday at the Super Bowl NFL Charities Celebrity Bowling Classic and on game day from Phoenix.

NFL legends and Super Bowl players will also videotape greetings that will be seen worldwide on the Armed Forces Network and the Pentagon Channel and offered to Fox Sports for use in the Super Bowl broadcast.

About LifeSize Communications

LifeSize is the first company to develop and deliver high definition video communications products. Founded in 2003 by industry veterans and was named “Videoconferencing Company of the Year” in 2007 by Videoconferencing Insight. LifeSize’s award-winning solutions combine exceptional quality, user simplicity and administrator manageability to make video communications a productive, true-to-life experience. LifeSize is headquartered in Austin, TX with subsidiaries in Europe and Asia Pacific, and a network of channel partners reaching more than 80 countries.

About RADVISION

RADVISION (Nasdaq: RVSN) is the industry’s leading 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.

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