Subject: RE: [Sip] bis-05: Terminating a session

From: Tan Ya-Ching ICM N PG U ID A 1 <[email-masked]>
Date: Wed, 21 Nov 2001 09:58:30 +0100

| 
| > -----Original Message-----
| > From: Bob Penfield [mailto:[email-masked]]
| > Sent: Monday, October 29, 2001 3:45 PM
| > To: [email-masked]
| > Subject: [Sip] bis-05: Terminating a session
| > 
| > I suggest section 15 begin:
| > 
| > "Either the caller or callee may terminate a session for any reason. A
| > caller terminates a session either with BYE or CANCEL depending on the
state
| > of the dialog. A callee..."
| 
| OK, that sounds good.
| 

"depending on the state of the dialog" is not entirely correct. CANCEL can
be sent by the caller after receiving a provisional response to the INVITE
with no To tag (eg. a 100 Trying). In that case, no dialog has been created,
not even an early one. Perhaps it should be reworded as :

"Either the caller or callee may terminate a session for any reason. A
caller terminates a session with a CANCEL if no dialog has been created yet,
or with a BYE within a dialog (early or established)."

- Ya-Ching Tan

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