[asterisk-users] Transfer to fax

[Mike Diehl]

On Friday 24 February 2012 4:06:19 pm Kevin P. Fleming wrote:
> On 02/24/2012 05:00 PM, Mike Diehl wrote:
> > On Friday 24 February 2012 3:17:04 pm Mike Diehl wrote:
> >> On Friday 24 February 2012 2:39:48 pm Kevin P. Fleming wrote:
> >>> On 02/24/2012 03:32 PM, Mike Diehl wrote:
> >>>> Hi all,
> >>>> 
> >>>> I've got a user that has one phone number an wants to be able to us it
> >>>> for both voice and fax.
> >>>> 
> >>>> When a fax call comes in, he wants to do some incantation on the
> >>>> keypad and have the call go to the fax machine.
> >>>> 
> >>>> As I see it, he has 3 options.
> >>>> 
> >>>> 1.  (blind?) Transfer it to the fax extension.
> >>>> 
> >>>> 2.  Use features.conf to create a key sequence, say *2, to
> >>>> dial/transfer to a fax extension.
> >>>> 
> >>>> 3.  Use fax detect (SIP) to do it automatically.  However I'm also
> >>>> using FFA, so I suspect these are mutually exclusive.
> >>> 
> >>> They are not. Enabling faxdetect should do exactly what you want; it
> >>> will redirect the call to the 'fax' extension in the current context,
> >>> and you can then Dial() your FAX machine (or send the call to
> >>> ReceiveFAX).
> >> 
> >> Thank you.  Then, that's what I'll do.
> > 
> > On second though, I think my suggestion that FFA and fax detect were
> > mutually exclusive stemmed from the idea that a call that was being
> > originated/answered/handled by FFA would have it's call disconnected and
> > redirected by fax detect.
> > 
> > If this is the case, it changes my dial plan logic, and I'm not sure I
> > fully understand what changes I'll need to make.
> > 
> > For all I know, it might even simplify things by isolating all fax
> > handling in one block.
> 
> Well, first you should not have faxdetect enabled on outbound channels.
> That takes care of the 'originating' part.
> 
> If you have an inbound channel that you *know* you are sending to
> ReceiveFAX, then you can just disable faxdetect on that channel before
> doing so (this is why we made 'faxdetect' configurable from the
> dialplan). Alternatively, you can just let calls that you *know* are
> going to go to ReceiveFAX (dedicated FAX DIDs, for example) just 'idle'
> in the dialplan listening to silence until faxdetect kicks in and sends
> them to ReceiveFAX.
> 
> Note that the usage of FFA is not relevant here; whether you are using
> Fax for Asterisk, the free version of it, or res_fax_spandsp, the
> behavior and scenarios would be the same.

Very nice.  

Sounds like I need to add a faxdetect column to my SIP real-time configuration.  
Once I've done a sip reload or pruned/loaded my user agents, I should be good 
to go!

Didn't know faxdetect was configurable in the dialplan...  Pointer to how to do 
it?

BTW, FFA rocks!



-- 

Take care and have fun,
Mike Diehl.