LiberLabs Blog

HylaFAX is an enterprise-class system for sending and receiving facsimiles as well as for sending alpha-numeric pages.
The A01-PU3 is an usb PSTN modem that support the CDC ACM standard, and it works great on Linux!

On Debian you can easily setup an Hylafax Server installing it by:

aptitude install hylafax

And configure your fax device with faxaddmodem:

faxaddmodem /dev/ttyACM0

At [...]

On server:

socat tcp-l:54321,reuseaddr,fork file:/dev/ttyS0,nonblock,raw,echo=0,waitlock=/var/run/tty

On client:

while true; do socat pty,link=/dev/vttyS0,raw,echo=0,waitslave tcp:192.168.1.1:54321; done

A lot of fun exporting fax-modem serial line of servers geographically far and use a central hylafax server with multiple virtual modems =D