Panasonic Toughbook CF-18BCAGCMM Supplementary Manual page 8

Names and Functions of Parts
HSDPA/UMTS Modem Switch
LED Description
8
You can use this switch to power on and off the HSDPA/UMTS
modem independently from the computer, regardless of the computer
power status.
This function depends on the setting of the Setup Utility.
NOTE
The HSDPA/UMTS Modem Switch will not operate for approxi-
mately 5 seconds after the HSDPA/UMTS modem is turned on
or off.
If the HSDPA/UMTS Modem Switch is pressed and does not
operate, wait for more than 5 seconds and press the switch again.
In the Setup Utility, you can also set the HSDPA/UMTS modem
to power on and off when the computer is powered on and off.
Power On Indication:
A green LED will be used to signal when the HSDPA/UMTS modem
has been powered on.
Ring Indication:
This LED remains dark.
Status Indication:
The LED lights while the HSDPA/UMTS modem is running.