RadVision Ltd. (RVSN) surged to the highest in more than four years after Avaya Inc. agreed to acquire the Israeli maker of video-conferencing systems for about $230 million.

The shares soared 12 percent to 44.05 shekels, the highest level since December 2007, at the close in Tel Aviv. The stock has surged 52 percent in three days. The Tel Aviv-based RadVision made the acquisition announcement to the Israeli Stock Exchange today.

To contact the reporter on this story: Sharon Wrobel in Tel Aviv at swrobel4@bloomberg.net

To contact the editor responsible for this story: Gavin Serkin at gserkin@bloomberg.net