Tekelec Announces Release Date for Q1 2008 Results

MORRISVILLE, N.C.--(Business Wire)--
Tekelec (NASDAQ: TKLC) today announced that it plans to issue a
press release announcing its financial results for the first quarter
of 2008 before market open on May 6, 2008.

Conference Call

Tekelec has scheduled a conference call for Tuesday, May 6, 2008
at 8 a.m. EDT for management to discuss first-quarter results. The
Company also plans to provide on its web site immediately prior to the
call both GAAP and Non-GAAP numbers (including GAAP reconciliations)
for the first quarter and to discuss during this call certain
forward-looking information concerning the Company's prospects for
2008.

"Live" Webcast and Replay

Tekelec will host a live webcast of its conference call on
Tuesday, May 6, 2008, at 8 a.m. EDT. To access the webcast, visit
Tekelec's web site located at www.tekelec.com, enter the Investor
Relations section and click on the webcast icon. A webcast replay will
be available at approximately 11 a.m. on May 6, 2008 and for 90 days
thereafter.

Telephone Replay

A telephone replay of the call also will be available two hours
after the call for one week after the live webcast by calling either
(800) 642-1687 or (706) 645-9291 and entering the conference ID
#44213630.

About Tekelec

Tekelec leverages its global leadership in core multimedia session
control and network intelligence to ensure scalable, secure and highly
available communications. The company's leading signaling solutions
enable the interworking of different network applications,
technologies and protocols, providing a smooth transition to
next-generation networks. Corporate headquarters are located near
Research Triangle Park in Morrisville, N.C., U.S.A., with research and
development facilities and sales offices throughout the world. For
more information, please visit www.tekelec.com.

Tekelec
Joanne Latham
Director, Corporate Communications
919-653-9655
joanne.latham@tekelec.com

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