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Tekelec Opens TALI SS7/IP Source Code   Dec 7th, 20:20 UTC Tekelec announced that the source code for TALI (transport adapter layer interface) is now available as a free download from their web site. Tekelec Opens TALI SS7/IP Source Code to Industry Company Enables Open Architecture for Next-Generation Networks Linda Marco Manager, Marketing Communications (919) 380-3842 linda.marco@tekelec.com Erik Randerson Director, Investor Relations (818) 880-7821 erik.randerson@tekelec.com Geoff Livingston Stackig/TMP (703) 761-2557 glivingston@stackig.com Morrisville, NC (Tuesday, December 07, 1999): Tekelec (Nasdaq: TKLC) today announced that the TALI (transport adapter layer interface) protocol's source code implementation for open-system platforms is now available as a free download from its web site, http://www.tekelec.com/tali. TALI is being made available to the telecommunications and Internet industries as part of Tekelec's ongoing effort to promote an open network convergence solution featuring open interfaces. TALI facilitates migration from traditional circuit-switched and wireless networks to next-generation packet networks, including IP telephony networks, by enabling signaling between voice and packet networks. It is the middleware protocol that allows operators to support call set-up and tear-down, access full-featured service platforms, and perform diagnostics and monitoring in SS7 or IP networks. Companies who are building to TALI include Agilent Technologies, Cisco, ipVerse Inc., Telcordia, and Tellabs. Other companies are also planning to implement TALI. "We are making our source code easily and widely available to encourage the total adoption and further innovation of open network architectures," said Cecil Boyd, vice president and general manager of Tekelec's Network Switching. "Tekelec is fully committed to supporting the recommendations of the standards bodies. We have submitted TALI to the Internet Engineering Task Force (IETF) with the support of Level 3 and U S WEST Wireless, two service providers currently deploying the interface. Until standards are established, we are equally committed to helping our customers evolve their networks today. Opening our TALI source code will make it easier for our customers to create next-generation networks with best-in-class, multi-vendor products." Paul Langmeyer, director, New (packet-switched) Voice Infrastructure at Ryan Hankin and Kent,Inc., a leading industry analyst, commented, "Opening the TALI source code effectively breaks down the barriers to interconnecting the voice and packet networks by eliminating performance gaps and incompatible signaling implementations. With this free download, vendors no longer require proprietary SS7 stacks and hardware cards to incorporate SS7 access in their equipment. Tekelec's commitment to open-standards is a boon to the industry as technology often develops faster than the standards bodies can act. Tekelec and TALI adopters are leading the industry toward a common IP convergence solution." Tekelec, a leading supplier of signaling and control systems, develops innovative network switching and diagnostic solutions that enable the convergence of traditional and converged wireline, wireless, and IP voice and packet communications networks. The company also provides products and solutions for call centers and other telecommunications markets. Tekelec has its headquarters in Calabasas, California, and divisions in Morrisville, North Carolina, and Richardson, Texas. For more information, please visit http://www.tekelec.com. # # # The Tekelec logo is a registered trademark of Tekelec. (Submitted by Gregory Youngblood of LinuxTelephony) Return to today's headlines.

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