[Asterisk-Users] Using as FAX 100% IP

[Steven Kokinos]

I'd say that would depend on the configuration you are considering. We 
have a number of fax machines running off of sipura spa-2000's that 
connect to a remote asterisk server and terminate to the pstn via voip 
as well.

I'd say it's about 90% reliable at this point. However, we've noticed 
quite a bit of variability around the quality of the connection and 
underlying provider you are using for termination - so your results will 
vary.

It also seems a couple of other tricks help:

(1)put an ADSL filter at the fax machine end, this seems to help filter 
out noise from the signal and slow down the analog modem (not sure if 
this is an old maid's tale or not, but seems to help).
(2)if you are using the sipura as your ATA, disable all of the fax 
detection. Just make sure you are only allowing ULAW as your codec.

Other than that it's pretty straightforward. If you are looking to do 
something to send receive to files, etc. we haven't had any luck getting 
something along those lines to work w/pure voip.

-Steve

Hakem Taourchi wrote:
> Hello,
> 
> Before putting any effort, I would like to know if somebody has 
> successfully run asterisk receiving FAXs in IP and sending them out in 
> IP as well?
> 
>  
> 
> If yes using which components please?
> 
>  
> 
> Any help is greatly appreciated !
> 
> 
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