[SIPForum-discussion] [SIP Forum Discussion] INVITE request followed by CANCEL

[Ashutosh Panda]

Hi All,
  Warm greeting to all of you.
  I have two questions regarding Basic SIP behavior i.e. SIP2SIP call.

1. If INVITE request is followed by CANCEL request by the caller, if CANCEL
will be formed and sent to network?
2. If INVITE request is responded by 180 Ringing and the caller then sends
BYE request, will it be responded with 200 OK or 400 Bad Request or 481
Transaction Does Not Exist response?

Thanks in advance
Regards
Ashutosh
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