[SIPForum-discussion] Possible responses to 180 Ringing Messages

[AMIT ANAND]

Hi Albert,

Where did you get this question?

If i were on your place i would say non of these,

These all are requests and ideally there could be no response to a response.

Except ACK any of other four can come in a call flow after 180.

Cheers
Amit



On Fri, Dec 9, 2011 at 6:53 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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-- 
Thanks
Amit Anand
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