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Calltrade Carrier Services picks Sonus session border controllers

Sonus Networks, Inc. (NASDAQ: SONS) said that Switzerland-based competitive operator Calltrade Carrier Services AG is using the Sonus SBC 5000 Series of Session Border Controllers as part of its wholesale voice over Internet protocol (VoIP) service.

The Sonus SBCs are being deployed at Calltrade interconnect borders demarcation points where two networks meet to secure the network borders as well as monitor and enforce service levels.

Sonus Networks is a leader in IP networking with proven expertise in delivering secure, reliable and scalable next-generation infrastructure and subscriber solutions. For more information, visit

Calltrade Carrier Service AG is a provider of international telecommunications services, founded and based both in Zurich and Altendorf, Switzerland. For more information, visit


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