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Alan Johnston <alan@sipstation> Joann McMillen <joanne@avaya>

Transporting User to User Call Control Information in SIP for ISDN Interworking draft-johnston-sipping-cc-uui-07. Alan Johnston <alan@sipstation.com> Joann McMillen <joanne@avaya.com>. Status. Reviewed by: Spencer Dawkins, Keith Drage, Vijay Gurbani, and Laura Liess Thank You!

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Alan Johnston <alan@sipstation> Joann McMillen <joanne@avaya>

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  1. Transporting User to User Call Control Information in SIP for ISDN Interworkingdraft-johnston-sipping-cc-uui-07 Alan Johnston <alan@sipstation.com> Joann McMillen <joanne@avaya.com> SIP WG IETF-74

  2. Status • Reviewed by: Spencer Dawkins, Keith Drage, Vijay Gurbani, and Laura Liess • Thank You! • Completed SIPPING WG LC on requirements • Requirements scoped to interworking with ISDN UUI service - not for general SIP user information exchange • Ready for mechanism discussion SIP WG IETF-74

  3. Recent Changes • Justified redirection requirement • Added ISUP Q.767 references • Clarified REQ-5: • REQ-5: The mechanism should not require processing entities to dereference a URL to retrieve the UUI information. • Clarified discussion on native SIP usage • Clarified security considerations SIP WG IETF-74

  4. Open Issue • Should UUI carry meta-data like we are defining for INFO? • Raised by Jonathan on list • Needed for INFO because INFO is used for more than just ISDN/ISUP interworking • We can avoid this by keeping the narrow focus of this header field and defining a new header field (User-Info?) for non-ISDN information which will need meta-data • ISDN UUI going to/from PSTN does not and can not be tagged with meta-data - to do so is a layer violation for this service SIP WG IETF-74

  5. Next Steps • Feedback on header field mechanism? SIP WG IETF-74

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