Panasonic Toughbook CF-31ATA112M Reference Manual page 71

LAN
Connecting LAN
CAUTION
Do not connect the telephone cable to the LAN port.
1
Turn off the computer.
Do not use sleep
2
Slide downward and open the cover, and connect the cable.
Connect the LAN port (A) and the network system (server, HUB, etc.) using a LAN
cable.
3
Turn on the computer.
NOTE
The communication speed using the 2nd LAN port is lower than that of the other LAN port.
*1
or hibernation.
71
<Only for model with 2nd LAN>