I-D Action:draft-schulzrinne-ecrit-psap-callback-02.txt

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	Title           : Public Safety Answering Point (PSAP) Callbacks
	Author(s)       : H. Schulzrinne, et al.
	Filename        : draft-schulzrinne-ecrit-psap-callback-02.txt
	Pages           : 19
	Date            : 2010-03-08

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 or for a
clarification.  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, then 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 addresses callbacks in a
limited fashion and thereby covers a couple of scenarios.  This
document discusses some shortcomings and raises the question whether
additional solution techniques are needed.

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