Panasonic CF-W4 Series Reference Manual page 124

Modem
Click [Devices] - [Properties].
D
Click [Receive], and then add the check mark for [Enable device to receive] and
E
click [OK].
Click [Device Manager] in [start] - [Control Panel] - [Performance and
F
Maintenance] - [System] - [Hardware].
Double-click [Modems], and then double-click the internal modem.
G
Click [Power Management], add the check mark for [Allow this device to bring
H
the computer out of standby], then click [OK].
When making the settings in steps
be shortened to some degree.
When not using the Ring Resume function, we recommend removing the check
mark from [Enable device to receive] in the settings in step E.
CAUTION
When using this function, it is recommended that the AC adaptor be connected to the
computer.
124
above, the battery operation time will
A-E