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[edit] To make phone messages

save as wav

run

sox foo-in.wav -t raw -r 8000 -s -w -c 1 foo-out.sln

Can audacity be set up to save as foo-out.sln?

[edit] Digim card

Digim card Communication controller: Tiger Jet Network Inc. Tiger3XX Modem/ISDN interface

The install for this is not obvious or trivial. zaptel is no longer used as of squeeze.

You will need all of these installed:

dahdi

dahdi-firmware-nonfree

dahdi-linux

dahdi-source

Then run $ /usr/share/dahdi/usr/share/dahdi ( Yes, this is a nasty kludge that should not be )

• Use module-assistant to build dahdi-source

• add wcfx0 to /etc/modules (manually load it without rebooting via "modprobe wcfxo" )

• /etc/dahdi/system.conf ( the old zaptel.conf) contains

loadzone        = us
defaultzone     = us
fxsks=1
channels=1
echocanceller=mg2,1

• /etc/asterisk/zapata.conf should be renamed to chan_dahdi.conf

• Edit your dialplan and change Zap/XX references to DAHDI/XX

This software is overly complex to set up - this is 2011 udev should be doing all of this...

[edit] askoziapbx

Check out askoziapbx - very nice distro based on m0n0wall.