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BroadWorks VoIP Application Platform Routes Industry's First Satellite Call Ever Made Between two Integrated Satellite-Terrestrial Smartphones

GAITHERSBURG, MD, August 18, 2009 - BroadSoft, Inc., the leading worldwide provider of VoIP applications, today announced its involvement in the industry's first smartphone to smartphone VOIP call by mobile communications provider TerreStar Networks Inc. (TerreStar), a majority-owned subsidiary of TerreStar Corporation (NASDAQ: TSTR).

On July 20, TerreStar announced the completion of an end-to-end VoIP call over TerreStar-1, the world's largest, most advanced commercial communications satellite. BroadSoft's VoIP application platform, BroadWorks®, was used to route the call over TerreStar's all-IP core network.

TerreStar Networks has selected BroadWorks to power its new mobile broadband network service, which is expected to launch later this year. TerreStar's satellite terrestrial mobile network will provide voice, data and video services to help solve critical communication and business continuity challenges faced by government and emergency responders. The service also will be marketed to rural communities and enterprises that need "anywhere" coverage throughout the United States and Canada.

"When building our network, we searched for the most reliable strategic partners to future-proof our platform. We recognized BroadWorks as the superior solution for our new service, meeting our requirements for carrier-grade reliability, scalability, performance, and next-generation capabilities that can deliver future services as required," said Dennis Matheson, chief technology officer for TerreStar Networks. "We believe selecting BroadWorks helps strengthen our IP infrastructure and supports our long-term strategy to offer next-generation mobile communications across North America."

"We are pleased to be part of the foundation for TerreStar's new integrated satellite terrestrial service launching later this year," said Scott Hoffpauir, chief technology officer at BroadSoft®. "BroadSoft's expertise and market leadership in delivering IP communications solutions across a variety of networks will enable TerreStar to add more flexibility to their network and quickly adapt to changing service requirements. The recent demonstration underscores the versatility, flexibility and power of BroadWorks and its ability to work in a satellite-terrestrial environment."

About BroadSoft

BroadSoft® provides VoIP application software that enables the delivery of hosted telephony and multimedia services. After the 2008 acquisitions of Sylantro and the GENBAND M6 product line, BroadSoft has emerged as the undisputed market leader of VoIP application servers. BroadSoft's family of carrier-class products, including its award-winning flagship BroadWorks® technology, empowers wireless, wireline and cable carriers to deliver next-generation voice and multimedia applications and advanced features that enable them to increase revenue, enhance competitive differentiation and elevate customer satisfaction. BroadSoft products deliver the scale, open architecture and reliability that the world's leading telecommunications companies demand to serve mission-critical enterprise and residential broadband customers. BroadSoft provides VoIP applications to 15 of the top 25 largest carriers worldwide, as measured by recent annual revenue, including KPN, Korea Telecom, Qwest, SingTel, Sprint, Swisscom, Telefonica de Espana, Telstra, T-Systems, and Verizon. For additional information, go to www.BroadSoft.com.

About BroadSoft:

BroadSoft, now a part of Cisco, is a technology innovator in cloud PBX, unified communications, team collaboration, and contact center solutions for businesses and service providers across 80 countries. We aim to empower users and teams to share ideas and work simply to achieve breakthrough performance. For additional information, visit www.BroadSoft.com.

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