CHELMSFORD, Mass. -- Sonus Networks (Nasdaq:SONSE), a leading provider of voice over IP (VoIP) infrastructure solutions, and Volo Communications, Inc., a leading next-generation wholesale service provider and technology company, today announced that Volo has added packet voice solutions from Sonus Networks to its IP backbone network, further enhancing Volo's already unsurpassed technology solutions and service offerings to carriers, service providers and cable operators. Volo's nationwide IP backbone network is fully optimized for the highest quality business applications, offering MPLS services between switches, over one national backbone network rather than 1,000s of Internet subnetworks. Volo has now added Sonus' Open Services Architecture㤠(OSA) featuring the GSX9000 Open Services Switch into its technology solution.

"We chose Sonus Networks because the company is recognized as a pioneer in the VoIP market and because their products integrate very well with our own industry-leading Caerus Networks Inc. (CNI) network technology," said president and CEO Shawn Lewis of Caerus, Inc., Volo's parent company. "Many of our carrier, cable company and service provider customers already have Sonus infrastructure in their networks, and we view Sonus as a valued partner as we continue to build out our truly open, next-generation packet communications network across the U.S."

"With its next-generation network, Volo Communications is taking a leading role in driving the adoption of packet voice communications and enabling a full suite of hosted VoIP services for other carriers, cable operators, CLECs, and ISPs," said Hassan Ahmed, CEO and chairman, Sonus Networks. "We are very pleased to be working with Volo."

Sonus Networks Inc.

Caerus Inc.