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BroadSoft's Feature-Rich and Carrier-Grade Platform Positions Comstar to Capitalize on Russia's Red Hot Market for Corporate Network Services and Pending Liberalization of Residential Market

Gaithersburg, MD, July 5, 2005 - BroadSoft, Inc., the leading provider of VoIP application software, today announced that Comstar United Telesystems, one of Russia's largest digital telecommunications operators and a subsidiary of Sistema (LSE:SSA), deployed BroadSoft's hosted VoIP application software to support its suite of corporate voice network services. Based on the BroadSoft® BroadWorks® platform, Comstar provides its SME and large business customers all the advanced features of an IP PBX minus the cost of owning and operating one.

In 2004 Sistema announced the creation of Comstar United Telesystems - the merger of three alternative telecom service providers to offer business customers a one-stop-shopping solution for all their information technology needs. By adding BroadSoft's hosted VoIP applications to its converged services package, Comstar is able to deliver to their more than 28,000 corporate customers a complete range of hosted PBX features including audio and video conferencing, universal voice mailbox, find-me-follow-me services, automatic secretary and user-friendly web-based portals for each user. BroadWorks also supports Comstar's Voice VPN service that interlinks a company's subsidiaries into a single manageable voice corporate network.

"BroadSoft's hosted voice services appeal to our customers because they support a rich set of compelling features, eliminate the need for a PBX and lower total cost of ownership," said Semen Rabovsky, general director of Comstar United Telesystems. "By supporting the IMS architecture and multiple applications on one platform, BroadSoft positions us to integrate our wireless and wireline services and move into new markets, such as residential, as regulations change and demand grows."

Center of Telephony Integration (CTI), a Russian systems Integrator and software development company specializing in IP communications, managed Comstar's deployment of the BroadWorks platform. "Comstar is empowering Russian businesses to compete with the latest communications tools that eliminate the hassle and cost of premises-based PBX systems," said Igor Maslennikov, general manager at CTI. "BroadSoft leads this industry because they enable carriers to quickly launch profitable and compelling services that address the unique needs of new markets."

"Comstar is taking the lead in Russia's explosive telecommunications industry by providing businesses a comprehensive set of converged voice and data services that add value and save money," said Michael Tessler, CEO and president of BroadSoft. "We look forward to working with CTI to help Comstar grow with new services to new markets."

BroadSoft's BroadWorks VoIP application platform 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.

About Comstar United Telesystems

Comstar United Telesystems, a major digital telecommunications operator in the Moscow Region, was founded in May 2004 on the base of three key companies: Comstar, MTU-Inform and Telmos. The company holds one of the most comprehensive license packages for communication services, has the largest resource of installed numbering capacity and the capacity of external international Internet channels (more than 1Gbps). Comstar United Telesystems possesses one of the most powerful technical resources: a Multi-Protocol Transport Network 'Next Generation Network' (NGN) and a Synchronous Digital Hierarchy (SDH). Additional information is available at www.comstar-uts.ru

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 more than 100 network operators, including BellSouth, MCI, Singtel, Telstra, Verizon and XO Communications, leads the industry with more than 1,000,000 lines deployed. Additional information is available at 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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