[Asterisk-Users] RE: Fax

[Steven Critchfield]

On Wed, 2004-01-14 at 03:37, Jason Penton wrote:
> Hi Reinhard
> 
> Hmmm very interesting. 
> 
> I am using chan_modem_i4l to access my gazel ISDN PCI cards. I must tell you
> though that I have two fax machines the one sends perfectly and the other
> fails (sounds similar to your problem wrt training errors). Not quite sure
> where to go from here. I am going to listen to the line (as Steve suggested
> in an earlier post) and will post my findings.

I think you will find a common thread wrt echo on chan_modem_i4l. That
method wasn't meant rally for voice traffic and therefore has some
variable delays. In the case of data, the timing isn't critical as a
data app will eat the data at about any speed, in voice it is critical
to have specific timing and even more so in fax or modem audio. If you
can switch to Kapejods CAPI driver then it should be better.

> > -----Original Message-----
> > From: asterisk-users-admin at lists.digium.com 
> > [mailto:asterisk-users-admin at lists.digium.com] On Behalf Of 
> > Reinhard Max
> > Sent: 14 January 2004 10:30 AM
> > To: asterisk-users at lists.digium.com
> > Subject: [Asterisk-Users] RE: Fax
> > 
> > Hi,
> > 
> > On Tue, 13 Jan 2004 at 21:06, Jason Penton wrote:
> > 
> > > (I have successfully managed to receive faxes thru my isdn 
> > card so I 
> > > don't see why I shouldn't be able to send them).
> > 
> > that's interesting, as in my tests it was just the other way around.
> > 
> > I can send faxes through my AVM ISDN card (chan_capi), but 
> > when I try to receive a fax, app_rxfax fails after reporting 
> > some carrier training errors. I've posted the detailed error 
> > logs to this list some weeks ago.
> > 
> > Jason, are you using chan_capi, or chan_modem_i4l to access 
> > your ISDN card?
> > 
> > cu
> > 	Reinhard
> > 
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-- 
Steven Critchfield <critch at basesys.com>