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List:       sip-implementors
Subject:    Re: [Sip-implementors] RFC3261 says UAC can send BYE for an early dialog?
From:       "Bob Penfield" <bpenfield () acmepacket ! com>
Date:       2002-08-27 15:56:50
Message-ID: 001301c24de2$5b7ea7d0$2300000a () BPenfield
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----- Original Message -----
From: "Shankara, Udaya" <udaya.shankara@intel.com>

> Hi,
>    The caller may send BYE on early or confirmed dialogs as stated below.
> Section 12.2.1.2 of RFC 3261 states the following:
>
>    "A UAC SHOULD also terminate a dialog if no response at all is received
> for the request."
>    "For INVITE initiated dialogs, terminating a dialog consists of sending
a
> BYE."
>
> Now, if the caller sends INVITE and does not receive any provisional
> responses, should it send BYE when the transaction times out?
>
No. There is no dialog because there has not been a response. A early dialog
is created by a 1xx response and a confirmed dialog is created by a 2xx
response. No response, no dialog. You cannot send a BYE. You cannot send a
CANCEL. You just terminate the transaction. You have to assume the INVITE
was not received.


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