Sonus and Taqua Partner to Enable Rapid Wi-Fi Calling Deployment for Mobile Operators

For Immediate Release: December 16, 2015

Richardson, TX – December 16, 2015— Taqua, a leading supplier of IP communications systems, applications and services to mobile and fixed operators, today announced that Sonus Networks, Inc. (Nasdaq: SONS), a global leader in secure and intelligent Cloud communications, and Taqua have partnered to bring a fully virtualized, standard mobile core network solution to market that provides mobile operators the quickest path to commercial rollout of Wi-Fi Calling services, also known as Voice over Wi-Fi (VoWiFi). MobiFone Corporation, one of the largest mobile network operators in Vietnam, recently launched its Wi-Fi Calling service using the combined solution from Taqua and Sonus.

Under the terms of the partnership agreement, Taqua is integrating and reselling Sonus’s Session Border Control (SBC) portfolio with Taqua’s Virtual Mobile Core (VMC) to deliver advanced communications services to mobile network operator including VoWiFi and Voice over Long Term Evolution (VoLTE). Sonus is a leading supplier of next generation Cloud-based Session Initiation Protocol (SIP) and 4G/VoLTE solutions. Taqua is a leading supplier of IP Multimedia Subsystem (IMS) services cores, and smartphone client solutions for VoWiFi. The combined solution from Taqua and Sonus represents the fastest and most cost effective way for an operator to launch Wi-Fi Calling services. At MobiFone, the solution was used to install, turn-up, trial, and begin commercialized Wi-Fi Calling services in just a few months.

This virtualized core network solution enables mobile operators to deploy a seamless Wi-Fi Calling experience that uses the phone’s native dialer, contacts, call history and voice mail. Subscribers do not notice the difference between calls made over WiFi or cellular. The solution supports smartphones with built in native VoWiFi capability, such as the iPhone, as well as smartphones that use Taqua’s downloadable Mobile Client software.

“Wi-Fi Calling cost-effectively solves the indoor coverage challenge that has plagued the mobile industry since day one," said Frederick Reynolds, vice president of marketing for Taqua. "Ultimately, it improves customer satisfaction and lowers churn. By combining Taqua’s virtualized IMS core with with Sonus’s virtualized SBC, mobile operators can get a Wi-Fi Calling service to market quicker than ever before. We look forward to building a strong relationship with Sonus and are already jointly engaged with several operators worldwide.”

The Taqua Virtual Mobile Core (VMC) is a virtualized IMS core network that enables rapid delivery of next generation voice and messaging services, including VoWiFi and VoLTE. Deployed and in service within Tier 1 mobile operator networks since 2010, the VMC is a carrier-grade solution that combines multiple IMS functions into a single, virtualized software product., including a Telephony Application Server (TAS), IP Short Message Gateway (IP-SM-GW), Service Consistency and Continuity Application Server (SCC-AS), and Media Resource Function (MRF).

“The integration of Sonus’ virtual SBC into Taqua’s virtualized mobile network core, provides mobile operators with a best-in-class solution designed to speed the rollout of VoWiFi,” said Mykola Konrad, vice president, Go-to-Market, Sonus. “By utilizing Sonus’ virtual SBC, Taqua customers gain the advantage of strong security to protect the mobile network edge and on-demand scalability for a seamless Wi-Fi Calling experience.”

About Taqua® LLC.

Taqua is enabling the transformation to software-based service provider networks capable of delivering next generation voice, video and messaging services including VoIP, VoWiFi and VoLTE. Since 1998, Taqua’s software-based networking solutions have been deployed by hundreds of wireline, cable and wireless carriers to enable new services, drive new revenues and lower overall costs. Taqua is headquartered in Dallas, TX, with research and development facilities in Boston, MA, San Jose, CA, and Dallas, TX, and India, and sales offices in Asia and Europe. More information on Taqua can be obtained by calling +1.972.692.1800 or by browsing the website at www.taqua.com.

About Sonus:

Sonus brings the next generation of Cloud-based SIP and 4G/VoLTE solutions to its customers by enabling and securing mission critical traffic for VoIP, video, IM and online collaboration. With Sonus, enterprises can intelligently secure and prioritize real-time communications, while service providers can deliver reliable, secure real-time services for mobile, UC and social applications. Sonus offers an award-winning portfolio of hardware-based and virtualized Session Border Controllers (SBCs), Diameter Signaling Controllers (DSCs), Cloud Exchange Networking Platform, Policy/Routing servers and media/signaling gateways. Visit www.sonus.net or call 1-855-GO-SONUS. Follow Sonus on Twitter, Facebook, LinkedIn, YouTube and Instagram.

Important Information Regarding Forward-Looking Statements:

The information in this release contains forward-looking statements regarding future events that involve risks and uncertainties. All statements other than statements of historical facts contained in this release 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 “Risk Factors” section of Sonus’ most recent annual or quarterly report filed with the SEC. 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.

Media Contact:

Alex Fencl
Ketchum for Taqua LLC
404-879-9122
alex.fencl@ketchum.com

For Sonus:

Jason Vancura, +1-978-614-8321
jvancura@sonusnet.com