Comtrol DM ATS-LNX - Manual (Page 21)

PCMCIA Network Cards 21
IP Configuration (802.11 and Ethernet)
start_fn () { return; }
# Extra stuff to do before shutting down the interface
stop_fn () { return; }
# Card eject policy options
NO_CHECK=n
NO_FUSER=n
;;
esac
If no configuration is found in /etc/pcmicia/network.opts, the system will try to use
configuration information found in /etc/network/interfaces. This method has not
proved successful with wireless cards (though it seems to work with normal
Ethernet cards).
If you put IP configuration in /etc/pcmcia/network.opts, make sure it is not
duplicated in /etc/network/interfaces. Having configurations in both places (that is,
eth2 configuration in /etc/network/interfaces) has been known to cause problems for
802.11 wireless networking cards.