[asterisk-dev] Bounty

[Denis Galvao]

Is this possible to extract the ringing state from a 183 sip header?

I mean, is this possible to know if the far end is ringing through a
183 message?

Denis.

2010/2/24, Alex Balashov <abalashov at evaristesys.com>:
> Who told you that you're always going to get a 180 Ringing reply?
>
> Most providers that provide PSTN trunking will give you ringback as
> in-band via an early dialog (183 Session in Progress).  With some
> calls, you may just get a provisional 100 Trying reply and then
> nothing until a sudden 200 OK.  There are many possible flows and
> scenarios.
>
> On 02/24/2010 07:59 PM, CDR wrote:
>
>> I need a new Timeout parameter added to the Dial application, for SIP
>> dialing. The new timeout would be "first-ring" timeout, as opposed to
>> timeout for connection. If we don't get a 180 Ringing message before a
>> certain amount of seconds, the call fails. This a needed addition to
>> Asterisk. I need this in version 1.4 and cannot wait the normal time for
>> a "new feature" process to complete. The rationale is clear: many
>> carriers will hold the call indefinitely, instead of returning a 503. If
>> the call is ringing, then I don't care if it rings for 60 seconds, but
>> if there is no ringback before 6 seconds, I need yo try another carrier
>> and move on.
>>
>> Please contact me at nine five four 444 seven 4 zero 8
>>
>
>
> --
> Alex Balashov - Principal
> Evariste Systems LLC
>
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>
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