A protocol suite codified by the IETF (in RFC 2543) as a set of Session layer signaling and control protocols for multiservice - packet-based networks. With few exceptions - SIP performs much the same functions as the H.323 signaling protocols perfor

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1. A protocol suite codified by the IETF (in RFC 2543) as a set of Session layer signaling and control protocols for multiservice - packet-based networks. With few exceptions - SIP performs much the same functions as the H.323 signaling protocols perfor