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IETF Session Initiation Protocol. Henning Schulzrinne Columbia University New York, NY. SIP Overview. Lightweight signaling protocol to be standardized within IETF MMUSIC invite to new and on-going conferences multicast and unicast (“telephony”) personal mobility

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Ietf session initiation protocol

IETF Session Initiation Protocol

Henning Schulzrinne

Columbia University

New York, NY


Sip overview
SIP Overview

  • Lightweight signaling protocol

    • to be standardized within IETF MMUSIC

    • invite to new and on-going conferences

    • multicast and unicast (“telephony”)

    • personal mobility

    • call center: reach first, first all

    • change and add media

    • post dial delay: 1.5 RTT

    • uses either UDP or TCP




Sip protocol
SIP protocol

  • text based (~ HTTP)

  • methods




Sip for intelligent networks
SIP for Intelligent Networks

  • IN services “inside” & “outside” network

  • UPN: translation by redirect server

  • call forwarding: proxy, end system

  • call transfer: BYE

  • distinctive ringing: end system

  • 800#: charging responsibility of resource reservation

  • call center (queueing, first available)


For more information
For more information...


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