SIP is an application-layer control protocol signaling for creating, modification and termination of one or more participants in the conversation. These sessions can be multimedia Internet, IP telephony and multimedia distribution (such as voice mail). Session participants through multicast (multicast), mesh unicast (Unicast), or a combination of both mass communications. More detailed SIP, can refer to the relevant Web sites and books, such as SIP FORUM

121114138live.2004.12.22.tar111

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