[Asterisk-Users] Fax baud rate

[Remco Barende]

yes i know, it's not

i have been battling with this problem myself

I thought of a theoretical solution (but I have zero programming skills 
which means no possibility to code / try it) :
record the sound fax machines make when negotiating (specifically the 
part where they try to negotiate anything above 9600 baud) and make a 
provision in asterisk (an extra letter added to the Dial command?) that 
will make Asterisk monitor the channel and listen for the fax nego sounds 
and have Asterisk distort or mute the audio. This way all fax machines 
would be forced to lower their speeds.

I suspect that such a solution would greatly improve reliability for 
faxing without the need for drastic changes in the way asterisk works. If 
you could lower the speed further down to 4800 or even 2400 baud that 
might even be an interesting option. Instead of faxing at 9600 or 14k4 
through a normal (expensive) landline it could be cheaper to fax at 2400 
baud via a voip line depending on where you need to fax to.

None of my fax machines are able to reduce their TX/RX speeds, if any 
devices capable of capping the speed it would be a nice addition to the 
wiki, I would instantly buy some all-in-one machines that could do that


On Sun, 8 Jan 2006, Mark Ackroyd wrote:

> Does anyone know if it's possible to set the incoming and or outgoing fax
> baud rate in asterisk ?
>
> Mark
>
>
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