Sonus Networks Achieves Historic IP-Voice Milestone With Over One Trillion Minutes

Sonus Networks Achieves Historic IP-Voice Milestone With Over One Trillion
Minutes
Sonus IP-Based Networks Set New Standard for NGN Communications; Independent
Analyst Ranks Sonus as the IP-Voice Leader

WESTFORD, Mass., Jan. 15 /PRNewswire-FirstCall/ -- Sonus Networks, Inc.
(Nasdaq: SONS), a leading supplier of service provider IP-voice infrastructure
solutions, today announced it entered 2008 achieving a historic voice network
milestone. Leveraging Sonus' industry leading, breakthrough technology for
voice networks, operators now report that they have carried over one trillion
minutes in aggregate on their Sonus-based networks. With Sonus-based networks
deployed in more than 50 countries, operators around the world are setting new
standards for next-generation communications by delivering unparalleled
quality of service, reliability and unique service creation opportunities.
According to a report entitled, "VoIP Minutes and Subscribers: 3Q07
Update," issued by iLocus, approximately 40% of all long distance IP-based
voice traffic is carried over Sonus Networks' IP Multimedia Subsystem (IMS)-
ready networks, more than three times its nearest competitor. At the end of
2007, Sonus-based networks carried 36 billion IP-voice minutes per month.
"The trillion-minute mark is an important milestone for our company and
our customers. It demonstrates just how widely embraced IP as a transformative
technology has become in the communications space," said Hassan Ahmed,
president, chairman and CEO, Sonus Networks. "With the volume of traffic in
the core of the network continuing to scale in such a dramatic fashion, the
business imperative to adopt IP at the edge of the networks continues to grow
as well, and Sonus is well poised to capitalize on its leadership position."
The iLocus report stated that there were 232 billion national long
distance minutes, with Sonus-based networks comprising 42.2 percent.
International long distance minutes totaled 24.4 billion minutes, with Sonus
capturing 21.6 percent. Both market share numbers represent an increase over
Q2 2007.
"Many factors in today's telecommunications market are driving the
evolution to a converged network infrastructure," said Jahangir Raina,
Director, iLocus. "Operators trying to maximize the benefits of their IP
network require a robust IP-voice platform designed to withstand the current
demands of voice communications and scale for future growth. Sonus has
demonstrated its ability to meet these requirements and is continuing to
evolve its solution to manage increasing IP-services."
Sonus marked its 10 year anniversary in 2007 by unveiling advanced
solutions for today's next-generations networks, including femtocell
technologies for in-building wireless networks; advanced features for its
Network Border Switch product family, allowing disparate IP networks to
connect seamlessly; a new platform for residential networks, Access 7.0; and
the industry's most advanced services technology, IMX 2.0. These unique
capabilities expand operators' next-generation voice networks beyond
traditional boundaries enabling businesses and consumers greater service
quality and advanced features.
Today, Sonus is the leader in next-generation communications with a
comprehensive architecture designed to address all elements of the voice
network including long-distance, residential, enterprise, packet peering, IP-
applications and professional services.
About Sonus Networks
Sonus Networks, Inc. is a leading provider of IP-voice infrastructure
solutions for wireline and wireless service providers. With its comprehensive
IP Multimedia Subsystem (IMS) solution, Sonus addresses the full range of
carrier applications, including residential and business voice services,
wireless voice and multimedia, trunking and tandem switching, carrier
interconnection and enhanced services. Sonus' voice infrastructure solutions
are deployed in service provider networks worldwide. Founded in 1997, Sonus is
headquartered in Westford, Massachusetts. Additional information on Sonus is
available at http://www.sonusnet.com .
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. Readers are referred to Item 1A "Risk
Factors" of Sonus' Quarterly Report on Form 10-Q for the period ended
September 30, 2007, filed with the SEC, which identifies important risk
factors that could cause actual results to differ from those contained in the
forward-looking statements. Risk factors include among others: the impact of
material weaknesses in our disclosure controls and procedures and our internal
control over financial reporting on our ability to report our financial
results timely and accurately; the unpredictability of our quarterly financial
results; risks and uncertainties associated with the Company's restatement of
its historical stock option granting practices and accounting including
regulatory actions or litigation; risks associated with our international
expansion and growth; consolidation in the telecommunications industry; and
potential costs resulting from pending securities litigation against the
Company. 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.
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 Investor Relations: Sonus Media Relations:
Jocelyn Philbrook Shannon Breen
978-614-8672 781-487-4607
jphilbrook@sonusnet.com sbreen@racepointgroup.com

SOURCE Sonus Networks, Inc.

Jocelyn Philbrook of Sonus Networks, Inc., +1-978-614-8672,
jphilbrook@sonusnet.com; or Shannon Breen for Sonus Networks, Inc.,
+1-781-487-4607, sbreen@racepointgroup.com