Sonus Networks Brings Next-Generation Mobile Architectures to Life

Industry Leader Delivers on the Need for Speed

LAS VEGAS, Nev., March 31 /PRNewswire-FirstCall/ -- CTIA 2008 -- Hassan
Ahmed, chairman, president and CEO at Sonus Networks Inc., (Nasdaq: SONS)
today predicted that next generation telecommunications networks will continue
to disrupt traditional communications services and the entertainment industry
as consumers consider their mobile services indispensable and leverage the
higher mobile broadband speeds now available.
"Globally, we are in the midst of redefining communications, social
networking and how entertainment is delivered to consumers," said Ahmed, ahead
of the CTIA Wireless 2008 Convention. "Increasing broadband speed and
convergence bring a new level of capabilities and personalization to mobile
services. Operators, such as those attending CTIA 2008, are embracing this
opportunity and launching network plans, such as 4G that will revolutionize
the communications industry. The Sonus Networks vision for the IP network is
becoming a reality."
Fourth generation mobile broadband technology using Long Term Evolution
(LTE) is being trialed by operators around the world and will create a common
mobile network that enables consumers to move seamlessly across the globe
without limiting their mobile coverage. Additionally, LTE technology will
drive the IP mobile network where Sonus is able to deliver the enhanced mobile
services consumers want without heavy investment in infrastructure for the
mobile operators.
"It is clear the mobile industry is seeing significant grow in data
traffic as the wireless broadband market matures," said Brian Partridge,
director of service provider enabling technologies, Yankee Group. "Next
generation mobile broadband access technologies such as LTE and WiMAX, demand
scaleable and high performance IP services infrastructure."
A Sonus IP-based next generation infrastructure that includes the recently
announced mobilEdge, will allow wireless operators to quickly respond to
customers' demands for bandwidth hungry services and retain flexibility within
their network to innovate and take advantage of 4G networks.
"This year, we hear our customers talk about planning for these future
technologies," said Vikram Saksena, CTO at Sonus Networks. "The IP based
network and advanced switching capabilities of the Sonus infrastructure, helps
integrate the wireless and wireline services in use today. WiMax and LTE are
just alternative broadband technologies to us. Customers can make choices
about their infrastructure today, without worrying about the broadband
delivery they will use in the future."
Sonus Networks are exhibiting at the CTIA show in Las Vegas, booth #3439.
About Sonus Networks
Sonus Networks, Inc. is a market leader in IP communications
infrastructure 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' Annual Report on Form 10-K for the period ended December
31, 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, 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:

Investor Relations: Media Relations
Jocelyn Philbrook Lucy Millington
978-614-8672 978-614-8240
jphilbrook@sonusnet.com lmillington@sonusnet.com

SOURCE Sonus Networks, Inc.

Investors, Jocelyn Philbrook, +1-978-614-8672, jphilbrook@sonusnet.com, or
Media, Lucy Millington, +1-978-614-8240, lmillington@sonusnet.com, both of
Sonus Networks, Inc.