[asterisk-users] fax detection without answer

[JD]

I knew of this, but mostly ignored it since the zapata.conf method is a 
universal function. Either a channel (or channel group) does fax 
detection or it doesn't. I can't change it in the ongoing script.

In other words, if a call is going to a DID that _shouldn't_ do faxing, 
it goes to the fax extension anyway. There is no means of suppressing 
the fax detection. Alternatively, if I have fax detection turned off, 
there is no means of activating it after the calls has been answered.

And, as far as I can tell, once it jumps to the fax extension, there is 
no "go back to where you were before the jump" function.

But considering it, I have speculatively created immediate contexts to 
branch to, such as:
-----------------------------------
[incoming-PSTN-context]
exten => 5035551111,1,Goto(FaxCapableDID,${EXTEN},1)
exten => 5035552222,1Goto(PlainDID,${EXTEN},1)

[FaxCapableDID]
exten => 5035551111,1,  Answer
exten => 5035551111,n, blah blah
exten => fax,1, ... dial the fax handler

[PlainDID]
exten => 5035552222,1,  blah blah

[next-context]
-------------------------------

Sadly, the documentation on 'faxdetect' is slim. Is this a 'feature' 
that fax detection is ignored if there is no fax extension in the 
current context? In other words, are there gotchas? (Does ignoring the 
fax cause problems?)

Any feedback on faxing in general is invaluable to me.

John


Vinícius Fontes wrote:
> On zapata.conf:
>
> faxdetect=incoming
>
> The detected fax calls will be redirected to the 'fax' extension on the context set to the group of channels.
>
>
>
> Atenciosamente,
>
> Vinícius Fontes
> Núcleo de Tecnologias Convergentes
> Canall Tecnologia em Comunicações
> Passo Fundo - RS - Brasil
> +55 54 2104-7000
>  
> Convergent Technologies Core
> Canall Tecnologia em Comunicações
> Passo Fundo - RS - Brazil
> +55 54 2104-7000
>
> ----- "JD" <jdupuy-list at socket.net> escreveu:
>
>> Generic question,
>>
>> Is there a way to detect a fax call without actually taking it as a
>> fax  
>> call? In a non-universal manner?
>>
>> In other words, if fax tones are detected on the incoming call (on a 
>> Sangoma PRI card for example), I'd like to transfer that call back out
>>
>> of the PRI to a dedicated FAX system _if_ that DID number is one that
>>
>> has that service.
>>
>> It would almost have to be a system variable. GotoIf($[${FAXDETECT} =
>>
>> "YES"]? faxtransfer)
>>
>> Any suggestions in this regard?
>>
>> John
>>
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