Abstract:Next to the binary-based H.323 signaling protocolfor Internet telephony service developed by the Telecommunication World (ITU-T), a more lightweight text-basedprotocol was deemed necessary to address the specific needs of the Internet World. The Session Initiation Protocol (SIP) was introduced in the IETF and has meanwhile gained maturity and support. The SIP-based Internet telephony service guarantees the user mobility. If SIP user is the place where the Internet connection is possible, it anytime can use a I… Show more
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