Panasonic CF-T2 Series Reference Manual page 70

Modem
[System standby] elapses even during communications, and cuts off the
communications.
• If [Never] is set, the computer will not enter the standby mode during
communications, but once the computer resumes, the power of the computer will
remain on while the user is absent.
When the Ring Resume function is being used, some time elapses before a
connection is established (equal to the time for the computer to resume). To allow the
computer to resume, set the "Call" to a larger value than a typical telephone call. If it is
not possible for the sending side to set a long "Call", set the "Number of rings until
answer" (with the software application that is able to maintain the condition to receive
telephone calls) to a small value.
*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 or touchscreen is
touched.
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.
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