[SIPForum-discussion] What all the SIP error codes can be sent before 180 ringing and after 180 ringing.

[Rudra Kant Kanth]

Hi Aniella,

I was curious, what would happen in a situation when UAS is ready to answer
the call but has a Voice-Mail configured for it. So, assuming after 3 or 4
riings, the call should go to the VM. In such a case, wouldn't there be a
180 Ringing and then, a 3xx Redirect; thereafter this transaction would be
closed and finally a new INVITE being sent to the VM?
I couldn't test it immediately to see what all the messages are exchanged,
so thought of asking.

Regards,
Rudra

On Wed, Jan 4, 2012 at 4:32 AM, Aniella Juverdeanu <
Aniella.Juverdeanu at telus.com> wrote:

> Theoretically it might look possible when you read the overview in section
> 13.1 of RFC 3261 but when you read further you can see in section 13.2.2
> that  actually 180 followed by non-2XX final response doesn’t make sense.
> Better be an early dialog followed by a non-2XX (like 183 with SDP when the
> caller can hear an announcement and then the call can be release with SIP
> error).****
>
> Also logically, when you would look at such trace it would look strange.
> If 180 was sent by UAS it should mean that it found the destination ready
> to receive the call. Eventually there would be ring no answer when a timer
> would be started and what node has a smaller timer could terminate this
> call setup.****
>
> If actually 180 is followed by a non-2XX final answer, I would have the
> UAS that serves the destination check this signaling – it doesn’t look
> right, it makes no telephony sense.****
>
> ** **
>
> Thanks,****
>
> Aniella ****
>
> ** **
>
> *From:* discussion-bounces at sipforum.org [mailto:
> discussion-bounces at sipforum.org] *On Behalf Of *Keyur Amin
> *Sent:* December 24, 2011 10:41 AM
> *To:* Rudra Kant Kanth; kondareddy godlaveety
> *Cc:* discussion at sipforum.org
>
> *Subject:* Re: [SIPForum-discussion] What all the SIP error codes can be
> sent before 180 ringing and after 180 ringing.****
>
> ** **
>
> I dont believe there is any restrictions on error responses followed by
> 180. I think, you can have any 4xx, 5xx or 6xx messages except for 487.***
> *
>
>  ****
>
> *Thanks,*****
>
> *Keyur** **Amin*****
> ------------------------------
>
>  ****
>
>  ****
>
> ** **
> ------------------------------
>
> *From:* Rudra Kant Kanth <rudra.k1 at gmail.com>
> *To:* kondareddy godlaveety <kondareddi24 at gmail.com>
> *Cc:* discussion at sipforum.org
> *Sent:* Wednesday, December 21, 2011 9:26 PM
> *Subject:* Re: [SIPForum-discussion] What all the SIP error codes can be
> sent before 180 ringing and after 180 ringing.****
>
> After 180 Ringing, if the Callee rejects the call, you would see "*486
> Busy Here*". Attached is a sample trace for it.****
>
> ** **
>
> Regards,****
>
> Rudra****
>
> ** **
>
> ** **
>
> ** **
>
> On Wed, Dec 21, 2011 at 12:49 PM, kondareddy godlaveety <
> kondareddi24 at gmail.com> wrote:****
>
> Hi,****
>
>  ****
>
> Can any one help me out with the follwing scenario.****
>
>  ****
>
>  ****
>
> can we send 4xx client error codes after sending 180 ringing?****
>
>  ****
>
> 1. if so what all the 4xx SIP error codes can be sent before SIP:180 and
> after SIP:180?****
>
>  ****
>
> Can we send 5xx server Error codes after seding 180 ringing?****
>
>  ****
>
> 2. if so what all the 5xx SIP error codes can be sent before SIP:180
> ringing and after SIP:180?****
>
>  ****
>
> Can we send 6xx Global error codes after 180 ringing?****
>
>  ****
>
> 3. If so what all the 6xx error codes can be sent before 180 ringing and
> after SIP:180 ringing?****
>
>  ****
>
>  ****
>
> Regards,****
>
> Kondareddy****
>
>
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> ** **
>
>
> _______________________________________________
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