Sonus Networks and Netcentrex Team to Deliver IMS-Ready Multimedia Solutions

Sonus Networks and Netcentrex Team to Deliver IMS-Ready Multimedia Solutions

May 16, 2006

Integration of Industry Leading IP-Based Voice Solutions Streamlines Delivery of Next Generation Services

    CHELMSFORD, Mass., May 16 /Xinhua-PRNewswire/ -- Sonus
Networks, Inc. (Nasdaq: SONS), a leading supplier of
service provider Voice over IP (VoIP) infrastructure
solutions, and Netcentrex, the leading enabler of next
generation converged voice and video solutions, today
announced that the two companies have partnered to advance
consumer access to next generation voice applications. As
part of Sonus' industry leading Open Services Partner
Alliance (OSPA), Netcentrex and Sonus have tested and
deployed Sonus' industry leading IP Multimedia Subsystem
(IMS)-ready architecture with Netcentrex's MyCall(R) Media,
a video and VoiceXML development environment and execution
platform for service providers and operators. Together,
Sonus and Netcentrex are delivering on the power of
IMS-ready applications to transform the consumer experience
through interactive applications and services.

    "The promise of IMS changes the way consumers
experience voice service. It's no longer about making
simple person-to-person phone calls, but rather, it's about
integrating the entire spectrum of communication tools and
resources," said Hassan Ahmed, chairman and CEO, Sonus
Networks. "By partnering with leading innovative
companies like Netcentrex, we're able to provide carriers
with the types of services and applications that capture
consumers' imaginations." 

    As part of its OSPA testing process, Sonus has
certified the Session Initiation Protocol (SIP)-based
capabilities of Netcentrex's MCS IP Media Server, an
advanced, packet-based media service platform designed to
run advanced interactive voice and video services and to
act as a Media Resource Function (MRF) in an IMS
architecture. The integration of MSC IP Media Server with
Sonus' IMS-ready architecture enables seamless end-to-end
application call flow management, billing and provisioning,
allowing customers to access hosted, revenue generating
services. Together with Sonus' IMS-ready architecture, the
joint solution is an ideal platform for the deployment of
hosted Fixed-Mobile Convergent applications and services,
as well as numerous voice, video, and messaging
applications.  

    "One of the primary benefits of the IMS
architecture is the ability to deploy best of breed
solutions to offer the most robust service possible. With
its OSPA program, Sonus has gone a step further by taking
the guesswork out of the integration process," said
Olivier Hersent, Chairman and CTO, Netcentrex.
"Netcentrex's suite of next-generation multimedia
applications, coupled with the Sonus IMS-ready
architecture, provides a compelling foundation for carriers
that are looking to stake an early lead in the drive towards
IMS-powered next generation services."  

    Founded in 1999, the Sonus OSPA is the industry's
largest interoperability program dedicated to driving
standards-based interoperability for enhanced applications.
 During the last seven years, the OSPA has gained
significant industry momentum, with a membership of over
150 leading independent vendors.  Network operators
globally have relied on Sonus to deploy multimedia IP-based
applications that offer consumers new innovative services
that meet the demands for today's lifestyles.  

    About Netcentrex

    Netcentrex develops IP-based voice and video solutions
that enable communication service providers to deliver
wireline and converged fixed-mobile services for both the
consumer and enterprise markets. Netcentrex has over 2.8
million VoIP lines in commercial service and has been
recognized as the worldwide leader for Class 5 application
servers. http://www.netcentrex.net .

    About Sonus Networks 

    Sonus Networks, Inc. is a leading provider of Voice
over IP (VoIP) 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 Chelmsford,
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 the "Risk Factors"
section of Sonus' Annual Report on Form 10-K, dated March
14, 2006, 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 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.  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:      
     Jocelyn Philbrook        
     Tel:   [phone]             
     Email: [e-mail]  

    Sonus Media Relations:
     Sarah McAuley         
     Tel:   [phone]          
     Email: [e-mail] 

    Netcentrex Media Relations:
     Stephanie Geslin
     Tel:   [phone]
     Email: [e-mail]

SOURCE  Sonus Networks, Inc.