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Fujitsu LIFEBOOK U939 - Troubleshooting the WLAN

Fujitsu LIFEBOOK U939
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Appendix
How to Handle This Device
The WLAN device is an optional device that may come pre-installed in your mobile computer. Under
normal circumstances, it should not be necessary for you to remove or re-install it. The Operating
System that your mobile computer comes with has been pre-con gured to support the WLAN device.
The WLAN device operates in the 2.4 GHz ISM band and the 5 GHz
lower, middle, and upper UNII bands.
Microwave ovens may interfere with the operation of WLAN devices since they operate in the
same 2.4 GHz frequency range as IEEE802 .11b/g /n devices. Interference by microwaves
does not occur with IEEE802.11a radio which operates in the 5 GHz RF band.
Wireless devices that transmit in the 2.4 GHz range may interfere with operation of W LAN
devices in IEEE802.11b/g/n modes. Symptoms of interference include reduced throughput,
intermittent disconnects, and many frame errors. It is HIGHLY recommende d that these
interfering devices be powered off to ensure proper operation of the WLAN device.
Deactivating/Disc
onnecting the WLAN Device
Disconnecting the WLAN device may be desired in certain c ircumstances (to extend battery
life) or where certain environments require it (i.e. hospitals, clinics, airplanes, etc.). The
WLAN device can be disconnected in W indows using the WLA N icon in the system tray
(Note that disconnecting via the icon in the system tray does not turn off the radio; it
continues to transmit and receive even though it’s not connected.)
Press the key with the wireless icon (key
F5
) to start the WirelessSelector.
WirelessLANWirelessLANBluetoothBluetooth
The wireless co m
ponent indicator will go off when the wireless components are switched off.
Fujitsu 83

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