Press Release

BROADSOFT AND TEKELEC PARTNER TO OFFER SERVICE PROVIDERS POWERFUL NEXT GENERATION TELEPHONY SERVICES SOLUTION

ATLANTA, GA, June 4, 2001 — BroadSoft, Inc., the leading provider of service delivery systems for enhanced telephony services, and Tekelec (Nasdaq: TKLC), a leading developer of packet-telephony solutions, announced today that the companies will partner to deliver enhanced, web-enabled telephony services over converged voice and data networks. The two companies are engaging in joint marketing and sales efforts to enable integrated communications providers to deliver carrier-class, differentiated services such as follow-me-anywhere features and unified messaging to their enterprise customers.

The companies recently completed successful interoperability testing between BroadSoft's BroadWorks™ service delivery system and Tekelec's VXi™ Media Gateway Controller. BroadSoft's BroadWorks, which includes a rich set of web-enabled telephony services such as call waiting, voice mail, conferencing, auto-attendant and follow-me-anywhere applications, will interwork with Tekelec's VXi softswitch to provide a complete end-to-end packet-telephony solution for the service provider market. The Tekelec equipment provides the infrastructure, call control, signaling and provisioning capabilities, while BroadSoft provides the platform that allows the delivery of IP services. The joint BroadSoft-Tekelec solution supports multiple protocols and provides mediation between different network types, such as IP, ATM and TDM.

"We're very excited to be working with a market leader such as Tekelec to help speed the deployment of new and innovative communication services," said Scott Wharton, vice president of marketing for BroadSoft. "Tekelec's experience and reputation for delivering carrier-class, packet-telephony solutions to the telecommunications market, combined with BroadWorks' award winning suite of enhanced telephony services, will enable service providers to quickly deploy and offer differentiated services that will help attract new customers as well as retain existing ones."

Paul Miller, Tekelec's vice president of Packet Telephony, commented, "We are pleased to be working with BroadSoft to deliver innovative, revenue-generating applications that will enable our customers to compete in this dynamic, competitive market. In partnering with vendors such as BroadSoft, we are able to help carriers and providers realize the promise of packet telephony by enabling them to deliver a full range of voice and data services."

BroadSoft's BroadWorks is the industry's first complete service delivery system that enables service providers to offer a rich set of web-enabled user-friendly enhanced telephony services. BroadWorks' platform cuts across circuit and packet technologies, allowing service providers to roll out packet-based telephony services such as call forwarding, call waiting, conferencing and voice mail, auto-attendant and follow-me-anywhere services with incremental investment to their network infrastructure. These services can be customized and managed via BroadWorks' web-based portal, CommPilot™, which provides an alternative user interface for enhanced services, replacing the flash-hook and star codes of a standard phone.

The VXi family of softswitches couples the intelligence and reliability of the circuit-switched network with the speed and economy of the packet-switched network. The standards-based, high-performance VXi MGC is flexibly designed to interoperate with multi-vendor media gateways. Tekelec's softswitch delivers voice over IP and ATM, Internet offload, and packet tandem solutions.

Attendees of the Supercomm show (Georgia World Congress Center, June 5-7th, Atlanta, GA) can see a live demonstration of Tekelec's and BroadSoft's products, as well as their joint solution, at the BroadSoft and Tekelec booths (#4960 and #2726 [Hall C] respectively).

ABOUT BROADSOFT
BroadSoft, Inc., is the leading provider of service delivery systems for next-generation telephony services. BroadWorks, the company's flagship product, allows integrated communications providers (ICPs) to rapidly and economically design and deploy web-enabled enhanced telephony services to their customers. BroadSoft has received extensive industry recognition including "Hot Start-Up" awards by America's Network and Telecommunications magazines, two of the leading telecommunications industry publications. BroadWorks was also recognized as Product of the Year by Communications Solutions magazine. BroadSoft is located near Washington, DC, in Gaithersburg, Maryland, and also maintains a research and development facility in Montreal, Canada. Additional information can be found at www.broadsoft.com.

ABOUT TEKELEC
Tekelec is a leading developer of telecommunications signaling infrastructure, softswitches, diagnostic solutions, and service applications. The company's highly reliable solutions enable telecommunications carriers and equipment suppliers to achieve the benefits of the packet-telephony revolution, while keeping service quality and feature richness intact. Tekelec's innovative solutions are widely deployed in traditional and next-generation wireline, wireless, IP voice and data networks and contact centers worldwide. Corporate headquarters are located in Calabasas, Calif., with research and development facilities and sales offices throughout the world. For more information, please visit www.tekelec.com.

For further information contact:

BroadSoft
Deborah Shemony
+ (240) 364-5101
dshemony@broadsoft.com

Marcie Cheney
KG Communications
+ (703) 760-0900 x.102
marcie.cheney@kgcom.com

Tekelec
Linda Marco
+ (919) 380-3842
linda.marco@tekelec.com

Erik Randerson
Director, Investor Relations
+ (818) 880-7821
erik.randerson@tekelec.com


Booths #4960 and #2726
SUPERCOMM 2001

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BroadSoft™, BroadWorks™ and CommPilot™ are trademarks of BroadSoft, Inc. VXi™ and VXi MGC™ are trademarks of Tekelec. Other trademarks are the property of their respective holders