SIP – Session Initiation Protocol
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SIP – Session Initiation Protocol

SIP is an IETF protocol which was initially designed to establish, maintain and terminate multimedia sessions. Since its initial standardization, SIP has been adopted as the main signalling protocol in a variety of different network architectures. This includes the 3GPP IMS (IP Multimedia System), where existing SIP features have been utilized, in addition to new enhancements which have been specifically created.

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