KPN Deploys Tekelec Sigtran Signaling Platform to Improve Network Utilization.

EAGLE[R] 5 ISS Helps Operator to Deliver New Services While Reducing Costs

MORRISVILLE, N.C. & BARCELONA, Spain -- Tekelec (NASDAQ: TKLC), a leading developer of high-performance network applications for next-generation fixed, mobile and packet networks, today announced that tier one operator KPN has deployed the Tekelec EAGLE 5 Integrated Signaling System (ISS) to expand its signaling network capacity and enable the transition to an all-Internet protocol (IP) architecture.

KPN provides telephone, Internet and television services to enterprise and residential customers through its fixed network in The Netherlands as well as mobile services across The Netherlands, Germany, Belgium and Western Europe. Replacing its existing out-dated signal transfer points (STPs), KPN selected the EAGLE 5 ISS to provide additional network signaling capacity and integrated applications that will provide a cost-effective transition to the future IMS network architecture.

The Tekelec EAGLE 5 ISS supports Sigtran (SS7 over IP) signaling, which is a stepping stone for cost-effectively migrating to IP multimedia subsystem (IMS) at the signaling layer. Sigtran provides increased capacity over IP--resulting in reduced link quantity requirements, more efficient bandwidth utilization, enhanced services and reduced transport cost. Together, these benefits allow operators to offer their customers new, more advanced services at competitive prices.

"We selected Tekelec to upgrade our signaling network because of the company's global leadership in IP signaling and integrated applications," said Michael Vocke, manager, Mobile Network, KPN. "With the EAGLE 5 ISS, Tekelec delivers a highly reliable and cost-effective solution for the transition to an all-IP mobile core network which will enable us to provide our customers with the next-generation services they require."

Wolrad Claudy, managing director for Tekelec's operations in Europe, Africa, Asia, Australia and the Middle East, added, "We are delivering a roadmap for operators to advance to tomorrow's next-generation networks while continuing to support today's network requirements. We welcome this opportunity to continue expanding our footprint in Europe and look forward to helping KPN retain its competitive position by delivering advanced services to its customers."

About KPN

KPN is the leading multimedia company in the Netherlands, providing consumers and consumer households with fixed and mobile telephony, internet and TV services. To business customers, KPN delivers voice, internet and data services as well as fully managed, outsourced ICT solutions. Both nationally and internationally, KPN provides wholesale network services to third parties, including operators and service providers. In Germany and Belgium, KPN pursues a multi-brand strategy with its mobile operations, and serves multiple customer segments in consumer as well as business markets.

At December 31, 2006, KPN served 6.3 million wireline voice subscribers, 8.6 million mobile customers, 2.1 million Internet customers and 0.3 million TV-customers in the Netherlands as well as 15 million mobile customers in Germany and Belgium. With 28,368 people (25,976 FTEs), KPN posted revenues of EUR 12.1 bn, with an EBITDA of EUR 4.8bn in 2006. KPN was incorporated in 1989 and is listed on the Amsterdam, New York, London and Frankfurt stock exchanges.

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 www.tekelec.com.