TEL AVIV -- RADVISION (Nasdaq: RVSN - News), a leading technology and end-to-end solution provider for unified visual communications, announced today that it has entered into a definitive merger agreement with Avaya, a global provider of business communications and collaboration systems and services. Pursuant to the merger agreement, Avaya will acquire RADVISION for cash of $11.85 per share and RADVISION will become a wholly-owned subsidiary of Avaya. The transaction is valued at approximately $230 million. The cash per share represents a premium of approximately 57% over the Company's average closing share price during the 90 trading days ended March 14, 2012. The payment will be made to RADVISION shareholders at the time of the closing, without interest and less applicable withholding tax.