[asterisk-users] Bottom line on fax reception

[Alex Balashov]

On Thu, 24 May 2007, shadowym wrote:

> So what is the bottom line?  Does it work or not.  I've heard stories it 
> works, it doesn't work, it kinda sorta works when it's not raining out 
> side. Everything under the rainbow.

   If you're talking about running it as analog pass-thru over G.711u over 
SIP, especially over the Internet-at-large, that's the answer;  it mostly 
works, unless it doesn't.  Analog fax is highly susceptible to even very 
minute distortions introduced by jitter, 1-2% packet loss, and/or 
out-of-sequence RTP payloads.  That's not something software can really
fix, except to the extent that T.38 may do so.

   If you're talking about picking faxes up over TDM/POTS, it should work 
fine. I've set it up a number of times and never had any problems.

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