The IESG has received a request from the Emergency Context Resolution with Internet Technologies WG (ecrit) to consider the following document: - 'Public Safety Answering Point (PSAP) Callback' <draft-ietf-ecrit-psap-callback-10.txt> as Proposed Standard The IESG plans to make a decision in the next few weeks, and solicits final comments on this action. Please send substantive comments to the ietf@ietf.org mailing lists by 2013-09-27. Exceptionally, comments may be sent to iesg@ietf.org instead. In either case, please retain the beginning of the Subject line to allow automated sorting. 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 file can be obtained via http://datatracker.ietf.org/doc/draft-ietf-ecrit-psap-callback/ IESG discussion can be tracked via http://datatracker.ietf.org/doc/draft-ietf-ecrit-psap-callback/ballot/ The following IPR Declarations may be related to this I-D: http://datatracker.ietf.org/ipr/2180/
