Press Release

BroadSoft Completes Interoperability Testing with Nortel Softswitch

Achieves Nortel "Compatible Product" Status

GAITHERSBURG, MD, September 12, 2005 - BroadSoft, the leading provider of VoIP application software, announced today that the BroadSoft®BroadWorks® VoIP application platform was awarded a Certificate of Compatibility from Nortel. BroadWorks Release 11.1 and 12.0, was awarded this certificate after completing laboratory SIP interoperability testing with Nortel's Communication Server (CS) 2000 (software release SN07 and SN08) and will now carry the Nortel Compatible Product designation.

BroadWorks provides a comprehensive range of advanced applications, including hosted PBX, IP Centrex, mobile PBX, business trunking and residential broadband services fully integrated into a single VoIP application platform. BroadWorks is uniquely capable of providing these applications with the reliability, redundancy, scalability and regulatory capabilities required to deliver carrier-class service.

"Nortel's rigorous interoperability testing in its state-of-the-art laboratory facilities provides their customers a crucial time-to-market advantage by simplifying the deployment of revenue-generating VoIP applications, like hosted PBX services," said Rober Weidenfeller, vice president of engineering at BroadSoft. "We look forward to working with Nortel to reach more customers and provide this compatible solution."

ABOUT BROADSOFT
BroadSoft's VoIP application software is revolutionizing the delivery of hosted telephony and multimedia services. Its flagship BroadWorks® technology empowers wireless and wireline carriers to deliver next-generation voice and multimedia applications and advanced features that increase revenue, enhance competitive differentiation and elevate customer satisfaction. BroadSoft's family of carrier-class software products delivers the scale, open architecture and reliability that the world's leading telecommunications companies demand to serve mission-critical enterprise and residential broadband customers. BroadSoft's customer base of 110 network operators, including BellSouth, MCI, Singtel, Telstra, Verizon and XO Communications leads the industry with more than 1,200,000 lines deployed. Additional information is available at www.broadsoft.com .

BroadSoft and BroadWorks are registered trademarks of BroadSoft, Inc. All other names are trademarks of their respective companies.

For further information contact:

BroadSoft
Hilary Tomasson
+1 (240) 364-5147
htomasson@broadsoft.com

Calysto Communications for BroadSoft
Cameron Smith
+1 (404) 266-2060 ext.19
csmith@calysto.com

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