Sonus Networks, Inc. (Nasdaq: SONS), a market leader in next-generation IP-based network solutions, today announced that it has achieved the largest quarterly market share gain and revenue growth in the Session Border Controller (SBC) business as reported by Infonetics Research in its recent Service Provider VoIP Equipment and Subscribers 3Q11 report.

Sonus solidified its position as one of the leading vendors in the SBC market with product revenues that grew an industry-leading 35.6 percent quarter-over-quarter and 232.7 percent from the same quarter a year ago. The company’s SBC market share also grew to 13.9 percent, up nearly five percentage points from last quarter and more than nine percentage points from a year ago.

“Our third quarter analysis shows that Sonus is experiencing solid growth and distinguishing itself as a vendor to watch in the SBC space,” said Diane Myers, directing analyst for VoIP and IMS at Infonetics Research. “While product testing and acceptance comprises a long cycle with service providers, Sonus has been moving ahead steadily with its SBC product portfolio including the NBS9000 TM and NBS5200 TM over the past year.”

The Infonetics report also notes that, “the growth of VoIP subscribers in fixed and mobile networks, SIP trunking, and IP interconnectivity will continue to be important drivers for SBCs,” emphasizing key areas of strength for Sonus as it expands its SBC footprint with new and existing customers.

This report is the latest in a series of market validations that Sonus has received as an enabler of SIP applications and services. A similar report issued by Exact Ventures in November also shows that Sonus is one of the top two vendors in the SBC space. In July, the NBS5200 received the 2010 Communications Solutions Product of the Year award for its outstanding innovation and in March, the NBS5200 and NBS 9000 session border controllers received the Performance Verified Award from Miercom.

“More and more customers are trusting Sonus to deliver the most advanced SBC products that offer great flexibility and the best performance under real-world conditions,” said David Tipping, vice president and general manager of Session Border Controllers at Sonus Networks. “These independent reports underscore that Sonus’ networked approach enables the advanced SIP applications and features that enterprise and service provider markets are looking for in a next-generation SBC solution.”

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