The RFC does mention this. In table 2, on page 162.
Header field where proxy ACK BYE CAN INV OPT REG
___________________________________________________________
Contact 2xx - - - m o o
regards
Satya T
________________________________
From: [email protected] [mailto:[email protected]] On Behalf Of
sandip gangakhedkar
Sent: Thursday, August 06, 2009 8:16 PM
To: [email protected]
Subject: [Sip] Contact header in 200 OK
Hi all,
I'd like to know if the Contact header is mandatory for a 200 OK
response to an INVITE request.
The RFC doesnt explicitly mention anything in this regard although a 200
OK is mandatory for a REGISTER request.
If the originating endpoint receives the Contact header in the 180
Ringing response (which I assume is mandatory), then it knows the
location of the remote endpoint, in which case the Contact header would
be redundant in the 200 OK response.
Waiting for some expert intervention.. :)
Regards,
--
Sandip Gangakhedkar
Mobile:+91-97396-99916
Office: +91-80-4363-3899
Profile: http://www.linkedin.com/in/sandipg
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