Modem settings are changed from the command line using mdmcfg(1M). Each call that results in a change to the configuration forces both files in /etc/uucp/default to be updated (current configuration and dialer files). For example:
Setting an attribute value:
/etc/uucp/mdmcfg Courier_V.34_Data_Fax_Modem -p term/00m \
-s SpeakerVolume High
Getting an attribute value:
/etc/uucp/mdmcfg Courier_V.34_Data_Fax_Modem -p term/00m \
-g SpeakerVolume
Restoring an attribute's default value:
/etc/uucp/mdmcfg Courier_V.34_Data_Fax_Modem -p term/00m \
-d SpeakerVolume
Retrieve all valid values:
/etc/uucp/mdmcfg Courier_V.34_Data_Fax_Modem -p term/00m \
-v SpeakerVolume
Missing out the attribute name with -g, -d and -v works on all attributes.
Options -s, -g, -d and -v can all be chained together in one invocation of mdmcfg.
Some values are read only and hence cannot be set by the -s option.
For further information, see
``Modem settings''.