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For this they will use GNU SIP (Session Initiation Protocol), a free implementation (with GPL license) of the SIP protocol, used for VoIP signaling. The objective of Free Call is to achieve a functionality similar to Skype on multiple platforms, but with notable differences, since it would not need a central service provider, it would use protocols with the source code available to everyone and there would be no control points network. |
Skype is the VoIP program that has established itself in the market as a reference for Internet telephony, to the point that it is already the largest "operator" in the world. There are free alternatives to Skype: OpenWengo, Ekiga or Klax. Also Google Talk, based on the open XMPP / Jabber protocol.
Now GNU presents its own alternative to Skype, based on the SIP and GNU SIP Witch protocols: GNU Free Call. Free, decentralized and multiplatform: free telephony for a free world. GNU announced yesterday the launch of its Free Call project, an initiative to develop and implement secure Internet communication services for private use or for public administrations, using free software.
The philosophy would be similar to that of P2P systems, so that Free Call could be used in civil emergency situations. As indicated in their blog, Due to its mesh topology used, the service could even work in isolated networks due to some type of emergency or network failure.
If you're interested, you can check out their website , and even participate in the project.
Source: Xakaton & GNU Telephony & Ubuntizing the Planet