Cauley Geller Bowman & Coates, LLP Announces Class Action Lawsuit Against Sonus Networks, Inc. on Behalf of Investors.

Business Editors & Legal Writers

LITTLE ROCK, Ark.--(BUSINESS WIRE)--June 19, 2001

The Law Firm of Cauley Geller Bowman & Coates, LLP announced today that a class action has been filed in the United States District Court for the District of Massachusetts on behalf of purchasers of Sonus Networks, Inc. ("Sonus" or the "Company") (Nasdaq:SONS) common stock during the period between December 11, 2000 and January 16, 2002, inclusive (the "Class Period"). A copy of the complaint filed in this action is available from the Court, or can be viewed on the firm's website at http://www.classlawyer.com/pr/sonus.pdf.

The complaint charges Sonus Networks, Inc. and certain of its officers and directors with violating Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, and Rule 10b-5 promulgated thereunder, by issuing a series of material misrepresentations to the market between December 11, 2000 and January 16, 2002, thereby artificially inflating the price of Sonus securities. The complaint alleges that defendants issued numerous statements which highlighted the Company's financial performance and described the Company's success in acquiring and/or developing new products which it was then able to offer to current and prospective customers. As alleged in the complaint, these statements were materially false and misleading because they failed to disclose and/or misrepresented the following adverse facts, among others: (1) that certain products that Sonus claimed it had sold to Qwest Communications International, Inc. ("Qwest") would not be ready for deployment in time to meet Qwest's needs and would result in Qwest having to purchase competing products from Nortel; (2) that the Company's highly-touted transaction with Qwest, which contributed more than 10% of Sonus' first quarter 2001 revenues, was actually a quid pro quo deal wherein Sonus had to agree to buy a $20 million Irrevocable Right of Use ("IRUs") from Qwest in exchange for a $20 million order from Qwest; (3) that contrary to defendants' representations, Sonus' products were not carrier class as they did not have 99.999% availability, did not have voice quality as good as circuit-switched networks and did not have sophisticated network management and configuration capabilities; and (4) as a result, Sonus was not on track to report revenues of $195 million in 2001.

On January 16, 2002, the last day of the Class Period, Sonus announced its disappointing fourth quarter and year-end 2001 results and revealed that revenues for the year were just $173 million compared to Class Period estimates exceeding $200 million. Following this announcement, shares of Sonus stock fell below $5 per share.

If you bought Sonus common stock between December 11, 2000 and January 16, 2002, inclusive, and you wish to serve as lead plaintiff, you must move the Court no later than September 17, 2002. If you are a member of this class, you can join this class action online at http://www.classlawyer.com/sign_up.html. Any member of the purported class may move the Court to serve as lead plaintiff through Cauley Geller Bowman & Coates, LLP or other counsel of their choice, or may choose to do nothing and remain an absent class member.

Cauley Geller Bowman & Coates, LLP has substantial experience representing investors in securities fraud class action lawsuits such as this. The firm has offices in Florida and Arkansas, but represents investors throughout the nation. If you have any questions about how you may be able to recover for your losses, or if you would like to consider serving as one of the lead plaintiffs in this lawsuit, you are encouraged to call or e-mail the Firm or visit the Firm's website at http://www.classlawyer.com.