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TEL AVIV, Israel - Zohar Zisapel announced today that he has increased the offer price in his pending tender offer to purchase 5.0% of the outstanding ordinary shares of RADVISION Ltd. (Nasdaq: RVSN) (currently, 971,394 RADVISION shares) from $6.30 per share to $7.70 per share, net to the seller in cash, less any required withholding taxes and without interest. All shareholders who tender shares to Mr. Zisapel pursuant to the tender offer will receive the increased price for shares tendered and accepted for payment, regardless of whether such shares are tendered before or after this announcement, if the tender offer is consummated.