Hello Thanks for the answer Since this is still a draft I was wondering if anyone is familiar with any (even semi)working alternative (using some timer entry in the Route header). It seems to be mentioned in some documents that I have access to, without examples ...
br Manolis On Fri, Oct 25, 2013 at 12:04 PM, Richard Barnes <rbar...@bbn.com> wrote: > A new standard is in progress for just this question: > <https://datatracker.ietf.org/doc/draft-ietf-ecrit-psap-callback/> > > It uses the Priority header to mark callbacks: > Priority: psap-callback > > > > > On Oct 25, 2013, at 12:21 PM, Manolis Katsidoniotis <mano...@gmail.com> > wrote: > > > Hi > > many thanks for the answer :) > > > > Any idea as to how I can get the Callback indication in there? > > > > Does the sip URI in that last one signify that it is a call back to an > > emergency call performed a few seconds earlier? > > > > Route: <sip:+49xxxxxxxxxx@172.24.0.3:5060;user=phone;lr> > > > > ... or is perhaps Emcy Callback shown some other way in the INVITE? > > > > thanks > > Manolis > > > > > > On Fri, Oct 25, 2013 at 3:27 AM, Despina Kitsou <kalist...@hotmail.com > >wrote: > > > >> Hello, > >> > >> > >> A typical Route header will look like this: > >> > >> > >> From RFC3261: > >> > >> Route= "Route" HCOLON< > http://www.in2eps.com/fo-abnf/tk-fo-abnf-siprules.html#hcolon> > >> route-param *(COMMA< > http://www.in2eps.com/fo-abnf/tk-fo-abnf-siprules.html#delim> > >> route-param) > >> > >> ; example: > >> ; Route: <sip:ss1.atlanta.example.com;lr>, > >> ; <sip:ss2.biloxi.example.com;lr> > >> > >> Other examples: > >> > >> Route: <sip:scscf1.ims.m-online.net:5090;lr;> > >> > >> Route: <sip:scscf1.ims.m-online.net:5090;lr>, > >> <sip:scscf2.ims.m-online.net:5090;lr> > >> > >> Route: <sip:+49xxxxxxxxxx@172.24.0.3:5060;user=phone;lr> > >> > >> Also here defined the sip parameters: > >> http://www.iana.org/assignments/sip-parameters/sip-parameters.xhtml > >> > >> br, > >> Despina > >> > >> > >> > >>> Date: Fri, 25 Oct 2013 00:16:37 -0500 > >>> From: mano...@gmail.com > >>> To: sip-implementors@lists.cs.columbia.edu > >>> Subject: [Sip-implementors] CallBack to emergency call > >> > >>> > >>> Hello folks > >>> > >>> I have an IMS case where a terminating point for emergency calls (PSAP) > >> is > >>> performing callback to the user that placed the original emergency > call. > >>> > >>> It appears that the top most Route header in CallBack INVITE needs to > >> have > >>> a Callback timer indication. > >>> > >>> Does anyone happen to have an example of how the Route header should > look > >>> like? > >>> > >>> (the flow below is just a quick indication, several packets are > missing) > >>> > >>> UE1 IMS SBC <==> PSAP > >>> | --------> | | > >>> | INVITE 911 | | > >>> | | | > >>> | | --------> | > >>> | | INVITE 911 | > >>> | | | > >>> | | <-------- | > >>> | | 200OK | > >>> | | | > >>> | <-------- | | > >>> | 200OK | | > >>> | | | > >>> | --------> | | > >>> | BYE | | > >>> | | --------> | > >>> | | BYE | > >>> | | <-------- | > >>> | | 200OK | > >>> | <-------- | | > >>> | 200OK | | > >>> | | | > >>> ====================================== > >>> Callback > >>> ====================================== > >>> | | | > >>> | | <-------- | > >>> | | INVITE | > >>> | | (CallBack) | > >>> | | | > >>> | <-------- | | > >>> | INVITE | | > >>> | (CallBack) | | > >>> | | | > >>> | --------> | | > >>> | 200OK | | > >>> | | | > >>> | | --------> | > >>> | | 200OK | > >>> | | | > >>> | --------> | | > >>> | BYE | | > >>> | | | > >>> | | --------> | > >>> | | BYE | > >>> | | | > >>> | | <-------- | > >>> | | 200OK | > >>> | | | > >>> | <-------- | | > >>> | 200OK | | > >>> > >>> thanks in advance > >>> Manolis > >>> _______________________________________________ > >>> Sip-implementors mailing list > >>> Sip-implementors@lists.cs.columbia.edu > >>> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > >> > > _______________________________________________ > > Sip-implementors mailing list > > Sip-implementors@lists.cs.columbia.edu > > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > > _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
