Is it valid to cancel a re-invite as in the call flow shown below?
I have never seen it. I though Cancels were only sent before a dialog
was established.
Thanks
Andy
LOCAL-SIP REMOTE-SIP
INVITE
--------------------->
180
<---------------------
200
<---------------------
ACK
---------------------->
(re)INVITE
<---------------------
some error response
---------------------->
CANCEL
<---------------------
200
--------------------->
487
--------------------->
ACK
<--------------------
BYE
<--------------------
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