[SIPForum-discussion] Possible responses to 180 Ringing Messages

[Abdenasser Ghomri]

Hi Albert,

We may respond to 180 Ringing message with BYE as well.

Refer to RFC-3261 Section 15 Terminating a Session :

The caller's UA MAY send a BYE for either confirmed or early dialogs.

Best Regards,

On Fri, Dec 9, 2011 at 11:53 AM, Albert Etsebeth <umbrualbert at gmail.com> wrote:
> Hi All
>
> I got this question in a exam, and its been driving me mad.
>
> Question:"what are valid responses to 180 ringing" (Choose 3)
>
> Options:PRACK / ACK / BYE /CANCEL /INVITE
>
> In my opinion there is only 2, PRACK and CANCEL
>
> Thanks
>
> umbru
>
>
>
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