Get the skinny on proprietary VoIP protocols

27 October 2006

You've heard of Skype, Cisco, and Asterisk and their VoIP products. Now, get the scoop on their proprietary VoIP protocols and how they interact with other, non-proprietary and open-source protocols.

My recent column on Voice over IP (VoIP) protocols covered the major players: H.323, Session Initiation Protocol (SIP), Megaco (H.248), Media Gateway Control Protocol (MGCP), and RTP. What we didn't cover were proprietary VoIP protocols such as the peer-to-peer VoIP protocols used by Skype, the Skinny Client Control Protocol (SCCP, also known as "Skinny") used by Cisco, and the Inter-Asterisk Exchange (IAX) protocol used by Asterisk. This week, we'll take a look at these and other proprietary protocols used in various vendors' implementations of VoIP

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