MORRISVILLE, N.C.-- Aug. 21, 2006--Tekelec (NASDAQ: TKLC), a leading developer of high-performance network applications for next-generation fixed, mobile and packet networks, today announced that the Tekelec 6000 VoIP (voice over Internet protocol) Application Server includes automatic disaster recovery features that help service providers deliver reliable communications services to subscribers during the hurricane season.

The Tekelec 6000 re-routes all IP phone calls automatically to a wireline or mobile phone if an operator's network is disrupted by high winds, flooding or other problems. The architecture of the Tekelec 6000 also lets operators locate their system servers, streamers and session border controllers in geographically diverse locations, ensuring no single points of failure and continued operation because of extreme weather conditions.

The National Oceanic and Atmospheric Administration (NOAA)* forecasts indicate that the 2006 hurricane season will be very active. The organization has named 13-16 storms, which could result in 4-6 major hurricanes.

The Tekelec 6000 has helped operators such as Louisiana-based RazorLine, L.L.C., and Florida-based Vortex Broadband keep services up and running during hurricanes. RazorLine, which set up VoIP services over temporary wireless Internet connections during Hurricane Katrina, relied on the Tekelec 6000 to provide reliable VoIP features throughout the storm.

"During and after Hurricane Katrina, customers relied on us to provide their communications lifeline to loved ones and important services that helped them get their lives back on track," said Gene Dry, managing partner, RazorLine. "It is our commitment to do everything possible to deliver reliable, uninterrupted services even in the most inclement weather situations, and the Tekelec 6000 VoIP Application Server provides critical disaster recovery features that help our customers stay connected."

During Hurricane Wilma, Vortex depended on the Tekelec 6000 to support its fixed wireless-based VoIP, Internet and virtual private network (VPN) services in Florida. "The Tekelec 6000 enabled us to keep VoIP services up and running for at least 85 percent of our customers even with 125 mph hurricane winds," said Todd Shepherd, president and founder of Vortex Broadband.

Jay Whitehurst, president and general manager of the Tekelec Switching Solutions Group, added, "During a natural disaster, operators rely on a solutions provider that helps them deliver communication services with minimal interruptions and quickly recover services in the event of a network outage. The Tekelec 6000's disaster recovery features have been proven with operators such as RazorLine and Vortex to provide reliable VoIP services for their subscribers to stay connected with loved ones and emergency services."

*Source: NOAA: 2006 Atlantic Hurricane Outlook, May 2006

About RazorLine, L.L.C.

RazorLine, L.L.C., is the first Louisiana-based, hosted PBX telephony service, bringing businesses in Louisiana, Texas, and Mississippi a new option to traditional PBX and traditional voice solutions to meet their telecommunications needs. Hosted PBX telephony provides customers with financial savings and unbeatable service reliability, as well as features, functionality and enhanced applications not available with traditional technology. Customers of RazorLine use a combination of wired and wireless connectivity as well as private networks to our hosted Tekelec 6000 VoIP Application Server. RazorLine's corporate headquarters are located in New Orleans, La., and it has a sales office in Baton Rouge, La.

About Vortex Broadband

Vortex Broadband is a leading independent operating carrier supplying voice, data, and video solutions for small and medium enterprise businesses. Vortex Broadband uses a wireless IP infrastructure to completely bypass the last mile owned by the local exchange carrier, thus providing tremendous savings to customers while improving quality, availability and scalability of the services. Corporate headquarters are located in West Palm Beach, Fla. For more information, please visit www.vortexbb.net.

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., United States, with research and development facilities and sales offices throughout the world. For more information, please visit www.tekelec.com.