[Asterisk-Users] Asterisk Faxing

[James Golovich]

On Sun, 22 Feb 2004, Andrew Kohlsmith wrote:

> First, please no HTML email.  Not only does it more than double the size of 
> your messages, it is plain bad etiquette for mailing lists.
> 
> Second, do not reply to a post, erase everything and then type your message 
> -- it breaks threading in a horrible way and buries your question in the 
> middle of another thread, where fewer people can see it.  Just click on the 
> "asterisk-users at lists.digium.com" and start a new message.  It's faster, 
> easier and works far better.
> 
> > What is the best or simplest method
> > to connect 4 fax machines into a
> > * system?
> 
> I am going to be testing the fax -> TDM400P solution shortly to see how it 
> works.  Please keep in mind that if you are connecting a fax machine and 
> you expect it to work, you *MUST* use the ulaw or alaw codecs (everything 
> else is geared for voice and will horribly break faxes or even DTMF tones) 
> and more importantly, you must disable the agressive echo cancellation in 
> the zaptel driver, as it tends to kill the faxes own echo cancellation.
> 
> Whether you can simply say "echocancel=no" for the appropriate Zap channels 
> I'm not sure.
> 

I don't explicitly disable echocancellation on the channels I use for fax,
and zaptel always seems to detect the tone to disable echo cancellation
from the fax.  I send/receive all my faxes over IAX2 with g711ulaw

James