[Asterisk-Users] Fax Handled

[Tilghman Lesher]

On Wednesday 13 August 2003 05:40 pm, Eduardo Goncalves wrote:
> On Mon, 11 Aug 2003 15:48:57 -0500
>
> Tilghman Lesher <tilghman at mail.jeffandtilghman.com> wrote:
> > > extensions.conf
> > > ===============
> > > [globals]
> > > TRUNK=Zap/g1
> > >
> > > [sip]
> > > exten => _0.,1,Dial(${TRUNK}/${EXTEN})
> > > exten => _9.,1,Dial(${TRUNK}/${EXTEN})
> > >
> > > exten => 710,1,Dial(SIP/client1)
> > > exten => 711,1,Dial(SIP/client2)
> >
> > Okay, that's the problem.  Asterisk does not detect faxes while
> > executing the Dial() application.  You need to Background() a
> > simple greeting (or just 2-3 seconds of silence) before executing
> > the Dial() application, then provide a fax extension for Asterisk
> > to jump to upon detecting the CNG tones.
>
>  	Could please detail how can I do this configuration?
>
> 	I dial from the fax machine and then, only press the "start"
> button, when the destination fax machine answer me and send the fax
> tone.	So, how could asterisk dial trought the fax exten if the fax
> tone are sent only when the call is completed?

The CNG tones are sent by the sending fax machine, not the receiving
fax machine.  Those tones are sent from the moment that the fax
machines dials and continues until either a timeout or the receiving
fax machine sends its synchronization tone.

How is your fax machine connected to the Asterisk machine?

-Tilghman