A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Emergency Context Resolution with Internet
Technologies Working Group of the IETF.
Title : Public Safety Answering Point (PSAP) Callback
Author(s) : Henning Schulzrinne
Hannes Tschofenig
Christer Holmberg
Milan Patel
Filename : draft-ietf-ecrit-psap-callback-11.txt
Pages : 14
Date : 2013-09-26
Abstract:
After an emergency call is completed (either prematurely terminated
by the emergency caller or normally by the call taker) it is possible
that the call taker feels the need for further communication. For
example, the call may have been dropped by accident without the call
taker having sufficient information about the current situation of a
wounded person. A call taker may trigger a callback towards the
emergency caller using the contact information provided with the
initial emergency call. This callback could, under certain
circumstances, be treated like any other call and as a consequence it
may get blocked by authorization policies or may get forwarded to an
answering machine.
The IETF emergency services architecture specification already offers
a solution approach for allowing PSAP callbacks to bypass
authorization policies to reach the caller without unnecessary
delays. Unfortunately, the specified mechanism only supports limited
scenarios. This document discusses shortcomings of the current
mechanisms and illustrates additional scenarios where better-than-
normal call treatment behavior would be desirable. A solution based
on a new header field value, called "psap-callback", for the SIP
Priority header field is specified to accomplish the PSAP callback
marking.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-ecrit-psap-callback
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-ecrit-psap-callback-11
A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-ietf-ecrit-psap-callback-11
Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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