Web Call Server supports audio and video calls from a browser to SIP devices, PBX servers, SIP-GSM gates, VoIP conferences and other devices supporting the SIP protocol. Therefore, a web application can work in a browser as a software phone with the support for the SIP protocol, receive and initiate voice and video calls.

• Overview
• Operation sequence (Call Flow)
• Making an outgoing call from a browser to a SIP device
• Receiving an incoming call from a SIP device in a browser