Sonus Networks To Host Telecom Day In Istanbul Turkey

WESTFORD, Massachussetts, May 30, 2011 -

Sonus Networks, Inc. (Nasdaq: SONS), a market leader in next-generation
IP-based network solutions IP-based network solutions, and Verscom Solutions,
a Sonus reseller, are hosting Telecom Day at the Four Seasons Hotel Istanbul
at the Bosphorus in Istanbul, Turkey on June 8, 2011. For more information on
the event or to register, go to: bit.ly/mmVXfS.

(Logo: photos.prnewswire.com/prnh/20100928/NE71605LOGO )

Telecom Day attendees will have the opportunity to network and share
ideas with telecom industry experts, learn about trends in the telecom
industry including wireless, IMS, over-the-top (OTT) and cloud computing. The
event will also feature lively discussions regarding the challenges and
opportunities presented by deregulation, such as Local Loop Unbundling.

For this one-day event, Sonus Networks has teamed up with Verscom
Solutions, a regional networking solutions provider. Verscom, which is based
in Istanbul, Turkey and has regional offices in Dubai, UAE and London, U.K.,
has extensive regional experience providing solutions and consultancy
services throughout EMEA.

"This event comes at a great time for this region," said Gurkan Ozturk,
executive vice president of global sales and marketing for Verscom. "Sonus
Networks understands the challenges and opportunities facing the telecom
industry in Turkey and knows how to address them. We urge anyone connected
with the local industry to come out and take part in Telecom Day."

Beginning at 9:00 a.m., the June 8 event will feature four distinct
session topics followed by a networking luncheon. The planned session topics
are:

    - Telecom Market Update
    - TDM to NGN to IMS
    - Local Loop Unbundling (LLU)
    - Opportunities in IP-based NGN

"Telecom Day is shaping up to be a terrific event," said Abir Hnidi, vice
president of sales, MEA region for Sonus Networks. "Thanks in part to our
local partner, Verscom Solutions, we are seeing very strong interest from the
local telecom community. Events like this are excellent for sharing industry
best practices."

There is no charge for attendance at Telecom Day. For more information on
the event or to register, go to: bit.ly/mmVXfS.

About Verscom Solutions

Verscom Solutions architects, engineers and delivers high quality,
comprehensive, and cost-effective next-generation packet-voice network and
convergent service infrastructures to Tier-2 and lower-tier fixed / wireless
network operators, carriers and service providers. Leveraging its
groundbreaking solutions and comprehensive strategic consultancy services
Verscom Solutions has successfully served 70+ clients in EMEA to date.
Verscom Solutions operates with its HQ in Istanbul, Turkey and regional
offices in Dubai, UAE and London, UK. For more information, please visit:
solutions.verscom.com.

About Sonus Networks

Sonus Networks, Inc. is a leader in IP networking with proven expertise
in delivering secure, reliable and scalable next-generation infrastructure
and subscriber solutions. With customers in over 50 countries across the
globe and over a decade of experience in transforming networks to IP, Sonus
has enabled service providers and enterprises to capture and retain users and
generate significant ROI. Sonus products include media and signaling
gateways, policy/routing servers, session border controllers and subscriber
feature servers. Sonus products are supported by a global services team with
experience in design, deployment and maintenance of some of the world's
largest and most complex IP networks. For more information, visit
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 year ended December 31,
2010 and all subsequent Quarterly Reports on Form 10-Q, which identify
important risk factors that could cause actual results to differ from those
contained in the forward-looking statements. 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 Networks:
    Aline Kaplan
    alkaplan@sonusnet.com
    +1-978-614-8167

.