To: Bilow who wrote (77584 ) 8/17/2001 12:23:44 AM From: Don Green Respond to of 93625 Wechsler Harwood Halebian & Feffer LLP Announces Class Periods -- (FFIV) F5 Networks, Inc.; (RMBS) Rambus Inc.; (ISLD) Digital Island Corp ; (ITXC) ITXC CORP Story Filed: Thursday, August 16, 2001 5:54 PM EST NEW YORK, NY, Aug 16, 2001 (INTERNET WIRE via COMTEX) -- Notice to persons who transacted in the following securities and respective class periods: CORPORATION CLASS PERIOD DUE DATE F5 NETWORKS, INC. 06/05/99-12/06/00 12/01/01 (NASDAQ: FFIV) RAMBUS INC. 01/18/00-05/09/01 10/12/01 (NASDAQ: RMBS) DIGITAL ISLAND CORP. 06/29/99-12/06/00 09/24/01 (NASDAQ: ISLD) ITXC CORP 09/27/99-12/06/00 09/24/01 (NASDAQ: ITXC) Wechsler Harwood Halebian & Feffer LLP (Wechsler Harwood) ( www.whhf.com)has been retained to investigate claims or filed class action complaints involving the securities of the above companies on behalf of investors. Wechsler Harwood has extensive experience representing shareholders in class actions and has served as lead counsel on behalf of shareholders in many such actions. The reputation and expertise of this firm in shareholder and other class actions has repeatedly been recognized by the courts. If you wish to discuss these actions, or have any questions concerning this notice or your rights or interests with respect to these matters, please contact Wechsler Harwood Halebian & Feffer LLP, 488 Madison Avenue, New York, New York 10022, by calling toll free 877-935-7400 or by contacting: Ramon Pinon, IV, Wechsler Harwood Shareholder Relations Department: RAMBUS INC.: rpinonIV@whhf.com Patricia Guiteau, Wechsler Harwood Shareholder Relations Department: F5 NETWORKS, INC.; ITXC CORP: pguiteau@whhf.com Craig Lowther, Wechsler Harwood Shareholder Relations Department: DIGITAL ISLAND CORP.: clowther@whhf.com CONTACT: Ramon Pinon, IV Shareholder Relations Department Wechsler Harwood Halebian & Feffer LLP 877-935-7400 Patricia Guiteau Shareholder Relations Department Wechsler Harwood Halebian & Feffer LLP 877-935-7400 Craig Lowther Shareholder Relations Department Wechsler Harwood Halebian & Feffer LLP 877-935-7400