Hi all,

What should be the behavior if the caller receives 200OK response to the
UPDATE method between 200OK (containing answer) and ACK for INVITE
(containing an offer)?


               Caller                                         Callee
                   |                                                |
                   |                                                |
                   | (1) INVITE with offer 1                |
                   |---------------------------------------------->|
                   |                                                |
                   |                                                |
                   | (2) 180                                     |
                   |<----------------------------------------------|
                   |                                                |
                   |                                                |
                   | (3) UPDATE with offer 2             |
                   |---------------------------------------------->|
                   |                                                |
                   |                                                |
                   | (4) 200 INVITE with answer 1     |
                   |<----------------------------------------------|
                   |                                                |
                   |                                                |
                   | (5) 200 UPDATE with answer 2  |
                   |---------------------------------------------->|
                   |                                                |
                   |                                                |
                   | (6) ACK                                    |
                   |---------------------------------------------->|
                   |                                                |
                   |                                                |
                   |                                                |
                   |                                                |


Regards,
Siddarth
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