HyperCube LLC Provides Cost-Effective IP and TDM-Based Tandem Interconnection Services to All Types of Carriers

WESTFORD, Mass. and LANCASTER, Texas, October 6, 2009 – Sonus Networks, Inc. (Nasdaq: SONS), providing network transformation through IP communications technology, and HyperCube, LLC, a premier provider of local and national tandem services to carriers across the United States, today announced that HyperCube has selected Sonus Networks to build the new infrastructure that will manage the growing volume of IP voice traffic on HyperCube’s network.

HyperCube, whose customers include the nation’s largest wireless and wireline network operators, is preparing for an increase in IP voice traffic across its network. The Sonus based network deployment is initially designed for secure IP-peering, session control and media management of IP traffic across the HyperCube network and as a gateway into HyperCube’s existing long distance core network. This network will allow HyperCube to simplify the management of IP and TDM traffic, making operations more efficient while offering increased capacity. HyperCube has enjoyed rapid growth in minutes of use on its network and anticipates growth to continue. Since its inception in late 2005, the number of minutes traversing HyperCube’s network has increased at a compound annual growth rate (CAGR) of 57%.

“HyperCube is trusted by the nation’s largest carriers to manage their traffic and is therefore responsible for their reputation for quality of service and availability,” said Doug Davis, CTO for HyperCube LLC. “The integrated Sonus Network Border Switch was the only solution proven to carry the scale of traffic we anticipate, as well as support our standards for quality of service delivery. We view this selection as the start of a strategic and long-term relationship with Sonus Networks, as we develop our business plans to serve a wider variety of carriers across the US.”

“HyperCube is focused on maintaining the highest standards of quality and service availability in a competitive marketplace,” said Guru Pai, senior vice president & general manager at Sonus Networks. “HyperCube needed a solutions provider with the experience of large scale, hybrid network design and deployment to prepare for the changing mix of TDM and IP traffic seamlessly, efficiently and cost effectively. We look forward to supporting its future business plans."

HyperCube, LLC is deploying a full suite of Sonus' solutions, including the Sonus GSX9000™ with Sonus Network Border Switch, the Sonus PSX™ Policy Server, the Sonus SGX and the Sonus Insight™ Management System. By deploying the integrated media gateway with network border switch from Sonus Networks, HyperCube will be able to take advantage of a hybrid approach to their network, with TDM and IP traffic running efficiently through the same infrastructure.

About Sonus Networks

Sonus Networks, Inc., providing network transformation through IP communications technology, is leading the evolution of communications networks to support the multi-device demands of today’s digital lifestyle. Sonus solutions and services enable fixed, mobile and cable operators to gain session awareness and deliver multi-media capabilities essential to adding value and expanding their customer and subscriber base. Through standards based interoperable solutions and services, Sonus extends the investments made in traditional networks by enabling operators to seamlessly migrate to next generation technology and deliver the secure, reliable, scalable and cost-effective network needed to grow their business. For more information visit www.sonusnet.com.

About HyperCube, LLC

HyperCube is a privately held and debt free company based in Dallas, Texas. HyperCube is a premier provider of local and national tandem services to carriers throughout the United States. HyperCube provides cost-effective IP and TDM-based tandem interconnection services to competitive carriers, including wireless, wire-line, cable telephony, and Voice over Internet Protocol (VoIP) companies. For more information, visit www.hypercube-llc.com.

Sonus Forward Looking Language

This release may contain forward-looking statements regarding future events that involve risks and uncertainties. Readers are cautioned that these forward-looking statements are only predictions and may differ materially from actual future events or results. For a discussion of the risks and uncertainties which could cause actual results to differ from those contained in the forward-looking statements, see “Risk Factors” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2008 and Quarterly Report on Form 10-Q for the quarter ended June 30, 2009. Risk factors include among others: the unpredictability of our quarterly financial results; risks and uncertainties associated with the Company's previous restatement of its historical stock option granting practices and accounting including regulatory actions; actions that may be taken by significant shareholders; risks associated with our international expansion; and the impact the current global financial market conditions may have on the telecommunications industry. Any forward-looking statements represent Sonus' views only as of today 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.

Sonus is a registered trademark of Sonus Networks, Inc. All other company and product names may be trademarks of the respective companies with which they are associated.

For more information, please contact:

Sonus:
Sonus Networks
Lucy Millington
978-614-8240
lmillington@sonusnet.com

RacePoint Group
Shannon Breen
781-467-4600
sonus@racepointgroup.com

HyperCube:
Joele Frank, Wilkinson Brimmer
Katcher
Kelly Sullivan / Tim Lynch
(212) 355 4449