SIP2SIP is a real time communications service for audio, video, presence, chat, file transfer and multiparty conferencing based on SIP, RTP, MSRP and XCAP protocols. The service is free to use based on a fair-use policy and federates with publicly reachable SIP and XMPP domains.

SIP account or password forgotten?

For help or support visit the online wiki here.

Download Blink SIP client for Mac OSX and Windows

Use your WebRTC enabled browser for audio/video calls at