Panasonic Toughbook CF-18BCAGCMM Reference Manual page 79

Modem
*1
To display the setting for [System standby],
Select [start] - [Control Panel] - [Performance and Maintenance] - [Power Options] - [Power
Schemes].
NOTE
This function does not work when the computer is off or is in hibernation mode.
After operations are resumed from standby mode, the screen remains dark. The
former screen display will be restored when the keyboard, touch pad, digitizer, or tab-
let button is used.
The computer cannot resume if a telephone is connected to the line of a modem (e.g.,
a PC Card modem) other than the internal modem.
79