> can B side respond to the timer offer with > a new offer "before" answering the first one?
Yes. > 200OK for INV is the last to be sent so if it > supersedes the UPD/200OK transaction what's > the point of putting session timer in UPDATE > anyway ... Among other reasons, it allows the proxies to know that the caller's device is still aware of the early dialog. The Timer C mechanism does not provide this knowledge unless 100rel is being used. > but if you omit then is it correct from a > protocol perspective? Yes; however if the sender does not indicate timer supported, they are indicating that they don't support RFC 4028. -- This email is intended solely for the person or entity to which it is addressed and may contain confidential and/or privileged information. If you are not the intended recipient and have received this email in error, please notify BroadSoft, Inc. immediately by replying to this message, and destroy all copies of this message, along with any attachment, prior to reading, distributing or copying it. _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
