Re: Contact header in 200 OK

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.

_______________________________________________
Sip mailing list  https://www.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Use [email protected] for questions on current sip
Use [email protected] for new developments on the application of sip