The service has now gone live. This is a great way for people without a SIP account to call those who do have one (like all the Debian Developers who got SIP on Saturday) using nothing more than a web browser (no plugin required).

Not just voice, webcams too

The supports voice and video calls from leading web browsers with WebRTC support.

Free calls made possible by free software

The service itself runs on free software, including some of the following components:

SIP users who want to receive calls from users simply need to make sure they have SIP over TLS enabled for their domain.

Calls from the phone box are anonymous but will always appear to come from the SIP address

For Debian SIP users

To make and receive WebRTC calls quickly and reliably: