Notes on the DAHDI driver

DAHDI is the driver layer used by Asterisk to communicate with telephony hardware.

After installing the DAHDI packages, check that the card is detected:

lspci
sudo dahdi_hardware

Generate the base configuration:

sudo dahdi_genconf
sudo dahdi_cfg -vv

Useful files to inspect:

• /etc/dahdi/system.conf
• /etc/asterisk/chan_dahdi.conf

After changes, restart the DAHDI service and reload Asterisk:

sudo systemctl restart dahdi
sudo asterisk -rx "module reload chan_dahdi.so"