Ietf session initiation protocol
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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

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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 and h 323

SIP and H.323


Sip addresses food chain

SIP addresses food chain


Sip protocol

SIP protocol

  • text based (~ HTTP)

  • methods


Sip operation in redirect mode

SIP operation in redirect mode


Sip operation in proxy mode

SIP operation in proxy mode


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...

  • http://www.cs.columbia.edu/~hgs/sip

  • IETF MMUSIC mailing list:[email protected]


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