Tekelec's velOSity Product Enhanced to Support Additional Broadband Wireless Applications.

Business Editors/High Tech Writers

MORRISVILLE, N.C.--(BUSINESS WIRE)--June 7, 2000

Enhancement Extends Tekelec's Broadband Wireless Leadership Position

Tekelec (Nasdaq: TKLC) today announced a major enhancement to its diagnostic operating system, velOSity(TM). The velOSity product family now supports EDGE (Enhanced Data Rates for GSM Evolution) technology in General Packet Radio Services (GPRS) and associated interfaces. EDGE is one of many technologies enabling the migration of Global System for Mobile Communications (GSM) to third-generation wireless (3G) technologies. Testing GPRS EDGE reliably is imperative as GSM operators and vendors employ GPRS technology to create new revenue-generating Internet-based services and applications, such as mobile office and e-commerce as well as Internet and Intranet access.

A member of the velOSity product family, velOSity GPRS has features based on GSM Association specifications. The velOSity family tests several convergence applications that provide diagnostic capabilities for specific technologies, such as GPRS, including GPRS EDGE, Universal Mobile Telecommunications System (UMTS), Internet Protocol (IP), and Signaling System 7 (SS7), including SS7 over Asynchronous Transfer Mode (ATM).

"Many observers believe that the adoption rate of broadband wireless technology will significantly exceed the explosive adoption rates seen in first-generation wireless communications systems," said Danny Parker, general manager and vice president of Tekelec's Network Diagnostics Division. "Tekelec has established a clear leadership position in advancing these new broadband technologies in the development environment. Today's announcement extends our leadership position by offering another testing solution for an important migration technology. We're proud to say that our diagnostic solutions enable the rapid delivery and deployment of such an important solution as third-generation wireless."

The velOSity GPRS solution enables stress testing of converged network equipment via its ability to provide high load rates in multiple scenarios simultaneously. With velOSity GPRS, procedures used for functional testing may be reused for system and load testing, saving test case development time. With velOSity's extensive reporting capabilities, users know exactly how the network is performing at all times.

With the addition of the Gn and Gb interfaces, velOSity GPRS now supports a wide range of interfaces, including Gd, Gr, Gs, Gc, Gp, and GSM A-G. It offers end-to-end testing, testing the EDGE-enhanced Abis interface and dynamic channel assignment (including the transcoder and rate adapter unit [TRAU] channels) of attached GPRS devices. The velOSity GPRS tests extremely high load rates, generates signaling traffic across the network, tests the control (signaling) plane and the user (data) plane, as well as generates bearer traffic and quality of service measurements.

About Tekelec

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 data 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, and velOSity is a trademark of Tekelec. All other products are registered trademarks or trademarks of their respective companies.