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Lingo First to Market with Feature Rich $19.95 Residential Offer, Unlimited International Calling Plans, and Local Numbers in more than 14 Countries

Gaithersburg, MD - March 8, 2005 - BroadSoft®, the leading provider of VoIP application software, today announced that Primus Telecommunications Inc. is using BroadSoft's BroadWorks® VoIP applications platform to support its Lingo Internet telephone service for homes and offices across the U.S. Primus Telecommunications, Inc., is the wholly owned subsidiary of Primus Telecommunications Group, Incorporated (NASDAQ:PRTL), a Fortune 1000(R) global telecommunications company with $1.3 billion in annual revenue.

Introduced in June 2004, Lingo is the most affordable Internet telephone/VoIP service in the U.S., and offers unmatched geographic coverage. Leveraging Primus' global presence, and a VoIP network that reaches over 150 countries, Lingo offers consumers unlimited calling in the U.S, Canada and Western Europe for only $19.95 per month with the first month free. Lingo brings users with a broadband connection an alternative to their traditional telephone company at savings of up to 80 percent.

"BroadSoft offers one of the most powerful network-based VoIP applications software solutions available on the market today," said Geoffrey K. Hicks, senior vice-president, network services & technology at Primus. "The BroadWorks platform's turnkey hierarchical management structure gives us the ability to scale to millions of users, support Lingo's multiple channels and agents, and offer flexible packaging and unbeatable pricing. BroadSoft provides complete regulatory compliance, including CALEA for primary line service, coupled with a robust, flexible feature set. We look forward to a strong working relationship with BroadSoft - a demonstrated leader in this sector."

In addition to being the most cost-competitive broadband Internet phone service available to American consumers today, Lingo is one of the most feature rich residential services in the industry. At no extra charge, Lingo calling plans include more than 25 popular calling features that users can easily configure based upon a technology platform that includes the leading BroadWorks web-based portal. Features include voicemail to e-mail delivery, call forwarding, and distinctive ring tones. Lingo also offers innovative new calling plans, such as "International Universal Numbers" that let Lingo customers select a "local" phone number from 14 different countries so that their family, friends, and business associates in those markets can call them at the price of an in-country call.

Lingo was the first major Internet phone service to offer home and office customers their own local phone number from 14 different countries, and to launch the first unlimited Asia plan in the U.S., which includes calls to China, Guam, Hong Kong, Japan, Malaysia, Singapore, South Korea, Taiwan, Australia, New Zealand, as well as Canada and the U.K. Consumers can learn more about the array of Lingo calling plans, and sign up online for the service, by visiting http://www.Lingo.com.

"With a strong existing customer base across the globe and one of the largest in the VoIP provider space, Primus is poised to grow Lingo's market share beyond the U.S. with services that are both compelling to its users and offer higher revenue margins for the company," said Michael Tessler, CEO and president at BroadSoft. "We are pleased to be working with leading, forward looking companies such as Primus as they roll out new and exciting services to their customers."

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

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 95 network operators, including BellSouth, MCI, Singtel, Telstra, and XO Communications leads the industry with more than 900,000 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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