SIP, Session Initiation Protocol, was initially proposed by IETF as an IP phone signaling protocol. It has been playing an important role in many fields including VoIP, soft switch, NGN and 3G.
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- SIP(Session Initiation Protocol,會(huì )話(huà)初始協(xié)議)是由IETF(Internet工程任務(wù)組)提出的IP電話(huà)信令協(xié)議,發(fā)揮著(zhù)越來(lái)越重要的作用,其應用領(lǐng)域從最初的VoIP擴展到軟交換、NGN和3G中。
