[asterisk-users] POTS - Incoming Voice or Fax - How to tell?

[Alex Balashov]

On Fri, 22 Jun 2007, Gary wrote:

> Basically, how does the machine know if the incoming call is a fax or 
> voice call?

   It quickly listens for fax tones - certain sequences of detection tones
from the other end that are in a particular acoustic band.

   Zaptel supports this on its interfaces (including FXO/POTS), although I 
have not tried it personally and do not know how well it works:

    http://www.voip-info.org/wiki-Asterisk+fax#Zapfaxdetection

-- Alex

--
Alex Balashov
Evariste Systems
Web    : http://www.evaristesys.com/
Tel    : +1-678-954-0670
Direct : +1-678-954-0671