Subject: [Ecrit] PSAP Callback

From: Hannes Tschofenig <[email-masked]>
Date: Wed, 16 Nov 2011 23:00:43 +0800

Hi all, 

at today's ECRIT meeting I noticed that at least one person (let's call him H. K.) had not read the latest version of the PSAP callback draft. It was updated in time before the submission deadline. 

Please have a look at updated introduction and scenario section at
http://datatracker.ietf.org/doc/draft-ietf-ecrit-psap-callback/

The introduction provides a description of the problem being solved and the scenario section illustrates (with figures) when the currently specified solution (which is in PhoneBCP) does not work. 

I have done my best to improve the readability of the draft and would appreciate feedback on the text. 

Cullen mentioned an important design requirement: He said that we should design the solution in such a way that it is as closely to an ordinary call as possible. He argued that the code required by these special cases only gets executed very rarely leading to all sorts of problems. 

Adam had some questions regarding the solution scope and prior solution approaches investigated by the group are documented in the appendix. 

Ciao
Hannes