This PHP sample code demonstrates how to make outbound voice Calls via TELECOMSXCHANGE. It shows this for specified carriers or termination end points of your choice including VIBER. The TelecomsXChange Voice API provides a way to route voice calls to any carrier around the world. TelecomsXChange is an Open Trading Platform for Voice Carriers that allows buyers to interconnect with hundreds of global carriers in minutes.
Vonage has announced the launch of the Nexmo Voice API, a new API that can be used to integrate enterprise-grade voice capabilities with Web and mobile applications. The API includes a collection of features such as call recording, text to speech, conferencing, and call control.