Do the Request-URIs line up?

Joel Gerber
Network Operations Specialist - Telephone
Telephone
Eastlink
joel.ger...@corp.eastlink.ca    T: 519.786.1241

-----Original Message-----
From: sip-implementors-boun...@lists.cs.columbia.edu 
[mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of Roger 
Wiklund
Sent: June-11-15 10:34 AM
To: sip-implementors@lists.cs.columbia.edu
Subject: Re: [Sip-implementors] 183 with 100rel required, followed by 180 with 
100rel supported

INVITE
Contact: "Ville Mex"
<sip:+46840921234@192.168.254.10:5060;transport=TCP>;tag=120e096f

PRACK on 183
Contact: "Ville Mex"
<sip:+46840921234@192.168.254.10:5060;transport=TCP>;tag=120e096f

PRACK on 180
Contact: "Ville Mex"
<sip:+46840921234@192.168.254.10:5060;transport=TCP>;tag=120e096f

They are identical.

On Thu, Jun 11, 2015 at 4:27 PM, Joel Gerber <joel.ger...@corp.eastlink.ca> 
wrote:
> I would take a look at the contact header in the INVITE and both PRACKs.
>
> Joel Gerber
> Network Operations Specialist - Telephone Telephone Eastlink
> joel.ger...@corp.eastlink.ca    T: 519.786.1241
>
> -----Original Message-----
> From: sip-implementors-boun...@lists.cs.columbia.edu 
> [mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of 
> Roger Wiklund
> Sent: June-11-15 9:59 AM
> To: sip-implementors@lists.cs.columbia.edu
> Subject: [Sip-implementors] 183 with 100rel required, followed by 180 
> with 100rel supported
>
> Call flow - outgoing call from PBX to ITSP.
>
> -->  INVITE with 100rel supported
> <--  100 trying
> <--  183 session progress with 100rel required
> -->  PRACK
> <--  200 OK on PRACK
> <--  180 ringing with 100rel supported
> -->  PRACK
> <--  481 Call leg/transaction does not exist
>
> I've checked the To/From tags and the Call-Id, everything is identical.
>
> I'm assuming the PBX is doing the correct thing here, it receives a
> 180 ringing with 100rel supported.
>
> Or is there something in the standard saying that if you have PRACKed one 
> provisional response there's no need to do it on subsequent provisional 
> responses?
>
> Any idea what the culprit could be?
>
> I've opened a ticket with the team running the server that's sending the 481, 
> but I just wanted to check with you guys if there's anything obvious here.
>
> Thanks!
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