After shares of Sonus Networks, Inc. (SONS) almost dropped 20% an investigation on behalf of investors of Sonus Networks, Inc. (NASDAQ:SONS) over possible violations of Federal Securities Laws was announced.

The investigation by a law firm focuses on possible shareholder claims based on potential violations of the federal securities laws in connection with certain financial statements.

Sonus Networks 12months Total Revenue decreased from $319.42million in 2007 to $249.31million in 2010. In 2008 Sonus Networks, Inc. had to report a Net Loss of $116.15million.
Shares of Sonus Networks, Inc. fell from almost $9 per share during 2007 to as low as $1.19 per share during March 2009. Since then SONS shares regained some value.

On February 28, 2011 Sonus Networks announced its results for the fourth quarter and full year ended December 31, 2010and issued its revenue guidance for the Fiscal Year 2011 above Analysts' Estimates


Sonus Financial said it expects to achieve total revenue between $265 million and $285 million for 2011. For 2011, GAAP gross margin is expected to be within the range of 58% to 62%, and total GAAP operating expenses are expected to be in the range of $151 million to $155 million. Non-GAAP gross margin is expected to be within the range of 59% to 63% on an annual basis, and total non-GAAP operating expenses are expected to be in the range of $143 million to $147 million for 2011.

Shares of Sonus Networks, Inc. (Public, NASDAQ:SONS) jumped from $3.03 on February 28 to $4.04 on March 01.


Then on On May 3, 2011, after the market closed, Sonus Networks Inc. disclosed its first quarter 2011 financial results, including a surprise first quarter loss and a low gross margin of 40.3% for the quarter, compared to a gross margin of 64.4% in the fourth quarter of 2010 and a gross margin of 62% in the first quarter of 2010.
On May 4, 2011, Sonus Networks common stock declined by 18.5%, or $0.68 per share, to close at $2.99 per share.