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IETF Session Initiation Protocol

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 call center

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IETF Session Initiation Protocol

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  1. IETF Session Initiation Protocol Henning Schulzrinne Columbia University New York, NY

  2. 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 • change and add media • post dial delay: 1.5 RTT • uses either UDP or TCP

  3. SIP and H.323

  4. SIP addresses food chain

  5. SIP protocol • text based (~ HTTP) • methods

  6. SIP operation in redirect mode

  7. SIP operation in proxy mode

  8. 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)

  9. For more information... • http://www.cs.columbia.edu/~hgs/sip • IETF MMUSIC mailing list:confctrl-request@isi.edu

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