Sonus Networks’ chairman and former CEO, Hassan Ahmed, has exited the company.

In May, Richard N. Nottenburg, the former executive vice president and chief strategy and technology officer of Motorola, was named as Sonus’ president and CEO, succeeding Ahmed (story here).

In the decade that Ahmed served as CEO of Sonus, he grew the company to annual revenues of more than $300 million. Sonus is now regarded as a leader in carrier-grade IP voice communications and counts each of the world's five-largest operators as customers.

Earlier this week, Sonus named Guru Pai as senior vice president. Pai will have direct responsibility for Sonus' sales and services organizations, business development and corporate strategy functions. Pai will be responsible for Sonus' overall go-to-market strategy. Pai will also help drive cost efficiencies and support the strategy for profitable growth.

And last week, Sonus said that it expects to cut about 50 jobs, or 5 percent of its work force, in order to save money and shift its business toward higher-growth areas, such as wireless and cable.

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