[Asterisk-Users] Fax Handled

[Tilghman Lesher]

On Friday 08 August 2003 13:30, Eduardo Goncalves wrote:
> On 08 Aug 2003 11:39:47 -0500
>
> Steven Critchfield <critch at basesys.com> wrote:
> > > 	Fax sometimes goes without problem and sometimes the fax machine
> > > can't send the fax.
> >
> > If your SIP link is over a long line, or that has much in the way
> > of variable latency, then this will just have to be expected
> > behavior. The problems listed above are not unique to asterisk but
> > the VoIP traffic trying to carry modem call. You would be better
> > off using a network fax gateway that accepts the image to be faxed
> > for you. You will find that it uses way less bandwidth this way
> > also.
>
> 	This link is an ethernet 10/100Mbits hub. There is no latency.
> 	What I want to know is why asterisk are not detecting that the call
> is a fax transmission.

Are the faxes all being sent by the same fax machine?  If not, are the
faxes being detected consistently from each source?  If the remote fax
machine/modem does not send CNG tones, then Asterisk will not detect
a fax.

-Tilghman