Comprehensive Study on SIP Trunking Reflects Emerging Enterprise Adoption

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Independent Report by Webtorials Reveals Nearly One in Three Enterprises Have Deployed SIP Trunking with an Average Cost Savings of Approximately 33%

Comprehensive Study on SIP Trunking Reflects Emerging Enterprise Adoption

<0> Sonus NetworksKerry Brackett, 978-614-8784orLois Paul & PartnersJackson Connell, 1 617-986-5748 </0>

Sonus Networks, Inc.

, Inc. (NASDAQ: SONS), a , today released the results of a global study which quantifies large enterprises deployment status, plans and attitudes about SIP Trunking and, by extension, Session Border Controllers (SBCs). Commissioned by Sonus and conducted by Webtorials Editorial and Analyst Division, the “2012 SIP Trunking State-of-the-Market Report” found that while VoIP is a fully mature technology within corporate networks for intra-company communications, SIP Trunking, by contrast, is still in the early stages of deployment. In fact, roughly two-thirds of the respondents reported either “Significant Use” or “Extensive Use” of VoIP, while only about one-third of the respondents reported either “Significant Use” or “Extensive Use” of SIP Trunks. Among those using SIP Trunks, significant cost savings have been realized, with an average savings on the order of 33%.

The study featured responses from IT professionals at nearly 300 large enterprises. Among those respondents who have “Significant” or “Extensive” use of VoIP the study found that saving money is most important, but increased functions are also important.

The top inhibitor among “non-implementers” was not surprising, as 29% responded that services were not available at all of their network locations.

With the second generation of SBCs emerging, a number of additional features beyond security are now becoming available. Because of the critical role of SBCs in all types of communications, unrelated to security, “Reliability” ranks as the most important SBC feature for users at 88%. “Scalability” is a very strong second – at 78%, the high rank underscores that respondents understand communications mandate scalability for both multiple users modes of communication. On a related note, 59% of respondents stated that their SBC must be “Capable of handling different types of multimedia traffic.” “Support for trunks with SIP and non-SIP traffic” was also significant at 58% as users clearly desire the capability to support both SIP and non-SIP traffic on the same trunk, allowing for dynamic utilization of all available bandwidth.

To download a copy of the ‘2012 SIP Trunking’ State of the Market report click .

“SIP has been a relevant topic for almost a decade but we are just now seeing the adoption and implementation of the technology take off as the barriers to implementation disintegrate,” said Steve Taylor, Editor-in-Chief and Publisher for Webtorials. “The ‘2012 SIP Trunking’ State of the Market report identifies the growing trend of large enterprise SIP Trunking deployments and outlines how the value users seek goes beyond cost savings to enable new features and applications.”

“Large enterprises continue to seek more and more efficient and flexible communications network foundation as a way to reduce complexity and cost, while increasing capability,” said Wes Durow, Vice President of Global Marketing at Sonus. “This study from Sonus and Webtorials reflects the growing momentum behind SIP Trunking deployments as a way to drive cost savings, while enabling new features such as Unified Communications or video across the whole of a company.”

Sonus, SONS, Webtorials, IT priorities, IT cost savings, session border controller, SBC, session initiation protocol, SIP, SIP trunking services, IPsec, media transcoding, ipv6 interworking, Sonus SBC 5100, Sonus SBC 5200, Unified Communications, UC, Cloud VoIP communications, Session Management, enterprise communications

Sonus helps the world's leading communications service providers and enterprises embrace the next generation of SIP-based solutions including VoIP, video and Unified Communications through secure, reliable and scalable IP networks. With customers around the globe and 15 years of experience transforming networks to IP, Sonus has enabled service providers and enterprises to capture and retain users and generate significant ROI. Sonus products include session border controllers, policy/routing servers, subscriber feature servers and media and signaling gateways. Sonus products are supported by a global services team with experience in design, deployment and maintenance of some of the world's largest and most complex IP networks. For more information, visit or call 1-855-GO-SONUS.

The information in this release may contain certain forward-looking statements within the meaning of the U.S. Private Securities Litigation Reform Act of 1995 regarding future events that involve risks and uncertainties. Although Sonus believes that its expectations are based on reasonable assumptions, readers are cautioned that these forward-looking statements are only predictions and are subject to inherent uncertainties, risks and changes in circumstances that are difficult to predict. All statements other than statements of historical facts contained in this report are forward-looking statements. Our actual results may differ materially from those contemplated by the forward-looking statements. For further information regarding risks and uncertainties associated with Sonus’ business, please refer to the “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and “Risk Factors” sections of Sonus’ filings with the Securities and Exchange Commission. Any forward-looking statements represent Sonus' views only as of the date on which such statement is made, and should not be relied upon as representing Sonus' views as of any subsequent date. While Sonus may elect to update forward-looking statements at some point, Sonus specifically disclaims any obligation to do so, except as required by law.