Tekelec Wins 2007 Billing World and OSS Today Excellence Award for Transitional IMS Program.

TeleStrategies Recognizes Tekelec for 'Achievement in Innovation'

MORRISVILLE, N.C. -- Tekelec (NASDAQ: TKLC), a leading developer of high-performance network applications for next-generation fixed, mobile and packet networks, today announced that it has won the 2007 Billing World & OSS Today Excellence Award for "Achievement in Innovation." Tekelec received this award for its efforts in developing a unique transition strategy to the Internet Protocol multimedia subsystem (IMS).

The innovative IMS transitional strategy has been the basis of a joint project of Tekelec and its customer Telemar, one of South America's largest fixed-line and mobile operators. Telemar is relying on the strategy in a phased restructuring of its network in the adoption of the IMS model. Telemar is migrating to IMS by performing an integrated signaling and softswitch function in both signaling system 7 (SS7) and session initiation protocol (SIP) networks.

The transition strategy is based on Tekelec's Service Creation System (SCS) and its service dispatch and control application. It allows carriers such as Telemar to maintain their existing prepaid platforms to support wireless and wireline technologies. They do not have to invest in two platforms as the Tekelec solution enables them to mediate between wireline systems that do not support CAMEL (Customized Application for Mobile Network Enhanced) signaling. It mediates between intelligent networks and CAMEL standards and supports IN services without IN triggers, a feature offered only by Tekelec.

"Our joint IMS evolution strategy with Tekelec enables us to migrate toward next-generation networks cost-effectively," said Jose Henrique Zilberberg, Telemar technology consultant. "Winning TeleStrategies' 'Achievement in Innovation' Excellence Award is evidence of our commitment to strategically enhance our capabilities and provide subscribers with the desired services at an affordable price."

Eric Gehl, president and general manager of Tekelec's Communications Software Solutions Group, added, "The transition to IMS has the potential to span many years, and carriers will scrutinize the economics and risks of transitioning to an all SIP-based architecture. The project with Telemar demonstrates our ability to help service providers rapidly, transparently and cost-effectively deploy applications in an evolving, increasingly competitive marketplace. Receiving TeleStrategies' 'Achievement in Innovation' Excellence Award is a testament to our dedication to help operators migrate services across multiple legacy and next-generation networks with an IMS-ready solution."

The Billing World and OSS Today Excellence Awards are presented annually by TeleStrategies, publisher of Billing World and OSS Today magazine, and recognize overall excellence in the billing and OSS segment of the telecommunications industry. The "Achievement in Innovation" award is given to a company that demonstrates the most innovative new product in the past year.

This year's winners were announced on Wednesday, April 25, at the Billing and OSS World 2007 conference at McCormick Place in Chicago.

About TeleStrategies

TeleStrategies, Inc. is the leading producer of telecommunications industry conferences, seminars, tutorials and trade shows. The company's 80 annual programs focus on emerging technologies, market opportunities, business strategies, regulatory issues and new services. Attendees come from ILECs, CLECs, IXCs, wireless carriers, satellite operators, network service providers, systems integration firms, Internet service providers, VoIP providers, cable companies, large end-user organizations, systems integration firms, consulting firms and vendors of hardware, software and services.

Additionally, TeleStrategies publishes Billing World & OSS Today, a monthly magazine that provides in-depth coverage of telecommunications industry billing and customer care.

About Tekelec

Tekelec is a high-performance network applications company that is accelerating the transition to IP Multimedia Subsystem (IMS) networks for service providers around the globe. With its experience at the intersection of network applications and session control, Tekelec creates highly efficient platforms for managing media and delivering network solutions. 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 http://www.tekelec.com.