Sonus Networks Acknowledges Receipt of Communication from Legatum Capital

WESTFORD, Mass., June 19 /PRNewswire/ -- Sonus Networks (Nasdaq: SONS), a
market leader in IP communications infrastructure, announced today that its
board of directors has received a communication from Legatum Capital. Sonus
always welcomes engaging with shareholders on how it can improve its market
position, and increase shareholder value, however, the board feels that the
Legatum communication does neither. Sonus has established itself as a leader
in IP communications infrastructure, and the company is committed to
delivering strong performance and fulfilling the needs and expectations of
customers and investors. While the board is committed to an ongoing dialogue
with Legatum, it will continue to pursue a strategic course which is in the
best long-term interests of the company and its shareholders.
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' Quarterly Report on Form 10-Q for the period ended March
31, 2008, 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 and patent 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: Ruder Finn:
Jocelyn Philbrook Lucy Millington Ed Harnarga
978-614-8672 978-614-8240 212-593-6361
jphilbrook@sonusnet.com lmillington@sonusnet.com harnargae@ruderfinn.com

SOURCE Sonus Networks

Investor Relations, Jocelyn Philbrook, +1-978-614-8672,
jphilbrook@sonusnet.com, or Media Relations, Lucy Millington, +1-978-614-8240,
lmillington@sonusnet.com, both of Sonus Networks, or Ed Harnarga of Ruder
Finn, +1-212-593-6361, harnargae@ruderfinn.com, for Sonus Networks