[SIPForum-discussion] SIP response 480 is same as SIP response 408

[Nitin Kapoor]

Hi,

Ideally 408 will come in those scenarios where the server could not produce
a response within a suitable amount of time.

Eg: if it could not determine the site of the user in time.  The client may
repeat the request without modifications at any later time.

Whereas 480 will normally come when the callee's end system was contacted
successfully but the callee is currently unavailable.

Eg: It’s not logged in, logged in but in a state that precludes
communication with the callee, or has activated the "do not disturb"
feature).  The response MAY indicate a better time to call in the
Retry-After header field.

Apart from that,  480 can also returned by a redirect or proxy server that
recognizes the user identified by the Request-URI, but does not currently
have a valid forwarding location for that user.

Also , please go through the sip rfc for further detail.

 Thanks,
Nitin Kapoor

On 13 June 2010 14:01, AMIT ANAND <amiit.anand at gmail.com> wrote:

> Hi Amit,
>
> Response 408 RTO is for a situation where any UAS is trying to send call
> further but did not get any reply back.
> Typically in your scenario say VOIP provider_2 is sending INVITE to PSTN
> operator ( Considering conversion is occuring at PSTN operator) but is not
> getting any reply from PSTN operator then it will give 408 to provider 1
>
> Temp Unavailable is that VOIP provider 2 sent invite to PSTN and the number
> is not available right now due to many possible reasons, might be turned off
> incoming calls at the moment or some thing like that
> So typically 408 cannot be send instead of 480.
>
> RFC 2833 if for DTMF , for these cause codes please refer to RFC 3261
>
> Cheers
> Amit
>
>
> On Sat, Jun 12, 2010 at 6:59 PM, amit salunkhe <amitsalunkhe21 at gmail.com>wrote:
>
>> Hi All
>>
>> As per the following call flow can anybody gudie me whether receiving Sp
>> response 408 instead of 480 when far end PSTN user is unavailable or
>> unreachable?
>>
>> Call Flow-
>>
>> Voip provider 1--------------------->VOIP
>> provider2_-----------------------> PSTN operator-------------------------->
>> PSTn network--->User
>>
>> If VOIP provider 1 getting SIP response 408 requs. time out instead of 480
>> Temp. unavailable, is this right signaling? Within RFC draft 2833 is here
>> any comment on this,like for temp. unavailable or unreachable user we can
>> accept 408 instead f 480?
>>
>> Please comment your thughts.
>>
>>
>> Amit--
>>
>>
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