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Schaller: The long journey towards good free video conferencing

Schaller: The long journey towards good free video conferencing

Posted Oct 15, 2012 17:22 UTC (Mon) by Tester (guest, #40675)
In reply to: Schaller: The long journey towards good free video conferencing by Cyberax
Parent article: Schaller: The long journey towards good free video conferencing

Sure SIP uses a separate connection for data and signalling. The signalling goes through the server and in theory, the media (the data) can be direct P2P, but in practice, in every SIP deployment, the SIP server munches the SDP to tell both sides to send their media through the server, because SIP was never designed to take NATs into account. Sure, ICE was designed for that, and although it's universally deployed with XMPP (because Google Talk requires it), also no one uses it with SIP.

And I should mention, the XMPP signalling is almost exactly the same as SIP, except better specified with less useless flexibility, meaning you get actual compatibility.


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