Tekelec to Present ENUM-based Solution Offering Cable Operators End-to-End Delivery of VoIP and Multimedia Services at NXTComm 2008

Tekelec (NASDAQ: TKLC), a leader in core multimedia session control, will deliver a presentation at NXTComm 2008 in Las Vegas that demonstrates a more efficient solution for cable operators to route IP-based services between different multi-service operator (MSO) networks. The presentation, Tuesday, June 17, will be delivered by Robby Benedyk, senior product manager for Tekelec’s TekPath Route Director product – an ENUM solution. Benedyk will discuss how Tekelec worked with other infrastructure providers to simplify IP service routing for operators, ensuring better quality of service, and reducing OPEX, by focusing on implementing a more efficient way for cable operators to route calls and multimedia sessions across MSO networks. The effort and resulting interoperability agreement is aligned with a new industry specification, the CableLabs PacketCable ENUM Server Provisioning Specification (ESPP), which Benedyk co-authored. Please click here to download Tekelec’s whitepaper, ENUM: Call Routing in an all IP World. "As operators look to improve their bottom line and increase customer loyalty, their networks must evolve to deliver converged, personalized communications, while maintaining a high quality of service,” said Benedyk. "With the ability to route calls and multimedia sessions over an all IP, SIP-based network, operators cut costs and consumers can benefit from an improved overall experience.” Here are details of the presentation: Venue: NXTploration Theatre When: Tuesday, June 17th at 3:30 - 4:05 PM Topic Title: "Successfully Traversing the Khyber Pass - Routing Calls with TekPath Route Director across MSO networks" Tekelec will also participate in the IMS/NGN ForumTM’s announcement of Plugfest 5 results. Tekelec is a member of IMS/NGN Forum and the company’s TekCore Session Manager has been one of the reference CSCFs for every Plugfest. The IMS/NGN Forum is the only industry association dedicated to interoperability and certification of IP Multimedia Subsystem (IMS) and Next Generation Network (NGN) applications and services, and offers the industry's only comprehensive interoperability events covering NGN services over wireless, wireline and cable broadband. Please click here for more information about the company’s TekCore Session Manager, and Tekelec’s whitepaper, Upgrading the Next-generation Network Part I A Signaling Perspective, can be downloaded by clicking here. Plugfest 5 extended the success of previous interoperability events to test policy controls, load balancing/sharing, charging/billing, user profiles, authorization credentials, service profiles and femtocell integration. The results will be announced by executives of the participating companies at presentations to be held on Wednesday, June 18. 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. FORWARD-LOOKING STATEMENTS Certain statements made in this press release are forward looking, reflect the Company's current intent, belief or expectations and involve certain risks and uncertainties. The Company's actual future performance may not meet the Company's expectations. As discussed in the Company's Annual Report on Form 10-K for 2007 (the "2007 Form 10-K”) and its other filings with the Securities and Exchange Commission (the "Commission”), the Company's future operating results are difficult to predict and subject to significant fluctuations. Factors that may cause future results to differ materially from the Company's current expectations, in addition to those identified in the Company’s 2007 Form 10-K and its other filings with the Commission, include, among others, changes in the market price of the Company’s common stock and changes in the Company’s financial results, financial condition and cash requirements. The Company undertakes no obligation to publicly update any forward-looking statements whether as a result of new information, future events or otherwise.