Sonus Networks, Inc., a leading supplier of service provider Voice over IP (VoIP) infrastructure solutions, announced that Interoute, owner and operator of one of Europe's most advanced telecommunications networks, has selected Sonus Networks' IMS (IP Multimedia Subsystem)-ready network infrastructure solutions to support the multimillion dollar expansion of its IP-based voice network into several major markets, including Madrid, Spain and Milan, Italy. The Sonus solution offers Interoute the authentication and security features necessary to support its carrier-class Virtual Voice Network (VVN) service and Arena, Interoute's commission-free voice exchange, which gives carriers the ability to exchange traffic securely and flexibly with other operators around the world. Sonus' IMS-ready, standards-based platform was selected because it provides Interoute with the scalability and reliability necessary to meet the growing demand for the company's enhanced voice services.

"For years Sonus and Interoute have partnered to develop one of Europe's most sophisticated VoIP networks. Interoute has been a pioneer in the rollout of high value IP-based services, such as iSip and Arena, and continues to invest in its Sonus-based network to differentiate itself as one of the premier providers of VoIP services in the region," said Hassan Ahmed, chairman and CEO, Sonus Networks. "As Interoute further extends its presence in cities throughout Europe, Sonus is uniquely positioned to help them meet their growth objectives and support the increasing amount of traffic being carried on their network."

"We selected the Sonus platform because, from day one, we recognized the flexibility that its distributed, standards-based architecture would deliver," said Matthew Finnie, CTO Interoute. "The Sonus platform utilizes sound engineering principles fundamentally in line with the emerging IMS standards, which enables the development of standards-based services such as enhanced content aggregation and delivery. A standards-based architecture is essential for the shared infrastructure products that Interoute offers to our customers."

Interoute has been a Sonus customer since 2002 and has deployed the complete Sonus architecture, including the GSX9000 Open Services Switch, the PSX Call Routing Server and the Sonus Insight Management System in cities across Europe and North America.