Sonus Solutions Selected to Power Leading European IP-Based Voice Service

Sonus Solutions Selected to Power Leading European IP-Based Voice Service

May 16, 2006

Telio Deploys Full Suite of Sonus IMS-Ready Infrastructure to Support Increasing Subscriber Traffic

    CHELMSFORD, Mass., May 16 /Xinhua-PRNewswire/ -- Sonus
Networks, Inc. (Nasdaq: SONS), a leading supplier of
service provider Voice over IP (VoIP) infrastructure
solutions, announced today that Telio, the largest and
fastest growing access independent VoIP provider in Europe,
has selected Sonus' industry-leading IP Multimedia Subsystem
(IMS)-ready solutions as the foundation for its next
generation IP-based voice network. Telio, which offers
primary line residential services throughout Europe,
selected Sonus because of its ability to meet
European-specific signaling requirements and to support
carrier-grade reliability and scalability for Telio's
plug-and-play IP-based voice service, which currently
carries more than 100 million minutes of voice traffic per
month. 

    "To encourage the adoption of IP-based voice
services, it is imperative that consumers experience the
same quality, reliability, and ease of use that they're
accustomed to with legacy voice offerings," said Alan
Duric, co-founder and CTO, Telio. "Telio's service is
a straightforward plug-and-play solution. By selecting
Sonus as the foundation for the network, we're able to
deliver the level of service that our customers expect,
introduce interesting new features and applications, and
scale as the demand for our service continues to grow
across Europe."

    Telio offers IP-based voice service in Norway under the
Telio brand, as well as offering its Telio Voice Production
System (TVPS) service on a white label basis for European
ISPs. Telio has deployed a suite of Sonus solutions
including the GSX9000(TM) and GSX4000(TM) Open Service
Switches, PSX(TM) Call Routing Server, SGX(TM) Signaling
Gateway, and the Sonus Network Border Switch for enhanced
security and direct IP-to-IP peering. With a full suite of
IMS-ready solutions in place, Telio's network can scale
seamlessly, introducing new applications and features
quickly and efficiently.

    "Sonus is one of the only solutions available
today that delivers proven quality and reliability with a
robust suite of residential voice features required for
primary line service in Europe," said Hassan Ahmed,
chairman and CEO.  "Sonus is dedicated to helping
European operators unlock the potential of next-generation
communications, increasing their average revenue per user,
and supporting enhanced applications that will redefine the
expectations for communications services."

    "The European market for both next generation
networks and IMS represents one of the most dynamic and
rapidly evolving opportunities for vendors in these market
segments. Whereas regulatory restraints hampered deployment
of solutions throughout the 1990s and early 2000s, the new
regulatory paradigm has opened the doors for innovative
companies to gain mind- and market share," said Tom
Valovic, Program Director for VoIP Infrastructure at IDC.
"Sonus, which has been addressing the European market
and aligning and customizing resources to meet its unique
demands, is well positioned to capitalize on these
trends."

    Sonus' IMS-ready architecture provides one of the
industry's most complete end-to-end network solutions that
meet the unique demands of the European market.  Sonus'
solutions support the delivery of services that match, and
in many cases surpass, those services offered through
traditional voice networks.

    "By providing the sophisticated network foundation
needed to support a feature-rich primary line voice service,
Sonus is helping to reshape the competitive landscape
throughout the European market," said Joop Van Aard,
vice president of sales, EMEA, Sonus Networks.
"Service providers like Telio are taking advantage of
next generation solutions to not only emulate the services
available through traditional voice networks, but also to
offer new and exciting services that capture consumers'
attention, promote customer loyalty, and improve long term
customer retention." 
 
    About Telio

    Telio is the largest and fastest growing access
independent VoIP provider in Europe. The company is
privately held and headquartered in Oslo, Norway. In
addition to offering services to end customers, Telio is
also offering Telio Voice Production System (TVPS) on a
white label basis for European ISPs. Among Telio's founders
and advisory board are found some of the most respected VoIP
and SIP experts in the world, and Telio aims to at all times
offer the most advanced multimodal broadband communications
platform in Europe. For additional details on Telio, please
visit http://www.Telio.no.  

    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 and Quarterly Report on Form 10-Q, dated May 8,
2006, both filed with the SEC, which identify 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                  
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    Media Relations:
     Sarah McAuley
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SOURCE  Sonus Networks, Inc.