CHELMSFORD, Mass and FRANKFURT AM MAIN, Germany -- T-Systems, the business customer division of the Deutsche Telekom Group (NYSE: DT) and one of Europe's leading providers of information and communications technology (ICT), and Sonus Networks (Nasdaq: SONS), a leading supplier of service provider voice over IP (VoIP) infrastructure solutions, today announced that T-Systems has awarded Sonus Networks a multi-million dollar contract for the worldwide expansion of its business VoIP network. The agreement marks the development of one of the world’s largest and most sophisticated business VoIP services networks designed for large to medium enterprise customers globally. The Sonus solution is also enabling T-Systems to deliver a new global peering service.

“We launched our business VoIP service targeting multi-national corporations with Sonus three years ago, and due to the good performance of the network we have been able to grow our business with enterprise customers,” said Bjoern Claassen, Member of the T-Systems Executive Committee. “This new network expansion gives T-Systems the flexibility to extend our service around the globe and continue to expand our portfolio of next-generation services.”

T-Systems plans initially to expand the network throughout Europe and North America, with other regions to follow. With its extended reach, T-Systems will deliver enhanced services such as their global voice virtual private network service (VPN); iST, International Service Telephony; VIP, Voice Interactive Portal and VNS, IP Voicenet Services. With the new global peering service, T-Systems will allow service providers to securely connect via IP to the T-Systems IP-based network.

“Sonus is committed to helping our customers stay at the forefront of new technology and services,” said Hassan Ahmed, chairman and CEO, Sonus Networks. “By initiating a significant expansion of their Sonus-based VoIP network, T-Systems will be able to deliver unified next-generation services to enterprise customers around the globe that meet the requirements for scalability and reliability that business customers demand. We are pleased to be working with T-Systems to support their strategic vision for business services.”

The contract includes Sonus’ latest technology introduction, the GSX4000 Open Services Switch, which will enable T-Systems to cost-effectively expand their VoIP network to less densely populated regions around the world. T-Systems has also selected Sonus to supply and deploy a fully integrated VoIP solution, including applications from partners in its Open Services Partner Alliance (OSPA). OSPA is the industry’s largest interoperability program and is deployed in customer networks around the globe. Sonus’ OSPA includes over 150 leading independent vendors that enable the seamless deployment of feature rich services. As a foundation for the network, T-Systems is utilizing key components in the Sonus architecture, including the GSX9000™ Open Services Switch, the NBS Network Border Switch, the PSX™ Call Routing Server and the Sonus Insight™ Management System.

Sonus Networks Inc.