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
