Hello Sandip Why do you say that RFC doesn't talk about Contact for 200 OK response of INVITE? It says that Contact header is mandatory for INVITE response only.
Header field where proxy ACK BYE CAN INV OPT REG Contact 2xx - - - m o o For OPTIONS, REGISTER it is optional and for rest of the messages (BYE, CANCEL ) it is forbidden. Regards Devki ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of sandip gangakhedkar Sent: Thursday, August 06, 2009 10:46 AM 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 ________________________________ This e-mail message is for the sole use of the intended recipient(s)and may contain confidential and privileged information of Transaction Network Services. Any unauthorised review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message.
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