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PS A P Callback. IETF#81, Quebec City, Canada draft-holmberg-ecrit-callback-00 [email protected] R E QUIREMENTS. 1 . Ensure that the PSAP callback call reaches the same device that made the associated emergency call. 2 . Identify that the call is a PSAP callback call.

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Ps a p callback

PSAP Callback

IETF#81, Quebec City, Canada

draft-holmberg-ecrit-callback-00

[email protected]


R e quirements
REQUIREMENTS

  • 1. Ensure that the PSAP callback call reaches the same device that made the associated emergency call.

  • 2. Identify that the call is a PSAP callback call.

    • Applies not only UA, but also ”home network”, in order to give special treatment (e.g. service disabling) to the PSAP callback call.


E xplicit vs implicit req 2
EXPLICIT vs IMPLICIT (REQ#2)

  • Do we need an explicit callback indicator, or is an implicit enough?

    • The draft proposes a dedicated feature tag, but there has been off-line discussions about using a GRUU (“eGRUU”).

      • UA would use eGRUU when making emergency call

      • Home registrar would identify PSAP callback based on eGRUU


Pr o posal to the wg
PROPOSAL TO THE WG

  • 1. AGREE ON REQUIREMENTS

  • 2. START WORK ON PROTOCOL MECHANISM