[SIPForum-discussion] Bye Method

[S@mir Telecom]

Hi,

If Offer & Answer model case, can send after 180 ringing(With SDP-Answer).

INVITE-------A sends SDP offer to ------------>B
<----------------B sends SDP Answer--------------   ///One way
flow...............
BYE ---------------A can send------------------------>



On Mon, Jul 6, 2015 at 4:27 AM, Paul Kyzivat <pkyzivat at alum.mit.edu> wrote:

> On 6/19/15 3:39 PM, Suman Mohanty wrote:
> > Hi All,
> >
> >      Can anyone explains  in which scenario we can send bye message
> > after receiving the 180 ringing?
>
> If A calls B and B returns 180 ringing, then there are good reasons for
> A to send BYE to B:
>
> 1) A changes mind about call and hangs up before getting a final response;
>
> 2) call is forked to B1 and B2. A decides to send BYE to B1 and wait on B2.
>
> There aren't very good reasons for B to send BYE to A, because it is in
> a position to send a variety of final error responses that are more
> specific than Bye.
>
> I don't *think* it is forbidden. A robust implementation should probably
> do the reasonable thing in this case. I would treat it as semantically
> equivalent to a 603 response. (But note that you still need to send an
> ACK to the INVITE.)
>
>         Thanks,
>         Paul
>
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-- 
~S at mir
M-0033762159688
PARIS
France



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Kṛṣṇa Kṛṣṇa,
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respect to others without requiring respect
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