Panasonic Toughbook CF-74CCB02BM Reference Manual page 61

Modem
Connecting the Internal Modem with a Telephone Jack
CAUTION
Use a surge protector since the modem may be damaged by a sudden high voltage surge that may occur in the event
of a lightning strike.
1
Open the cover (A), and connect the computer and the tele-
phone jack (B) using the telephone cable (included) (C).
Hold the cable so that the shape of the connector (D) matches the port, and
insert fully until it clicks.
2
Click (Start) - [Control Panel] - [Connect to the Internet] -
[Dial-up] and change the settings as necessary.
NOTE
Do not enter sleep or hibernation during communications.
To remove the cable, press and hold the lever and pull out.
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A