Bedienungsanleitung Fujitsu LifeBook T4220 Tablet PC (Seite 105 von 136) (Englisch)

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Wireless LAN User’s Guide

How to Handle This Device

The WLAN device comes pre-installed in your mobile

computer. Under normal circumstances, it should not be

necessary for you to remove or re-install it. The Oper-

ating System that your mobile computer comes with has

been pre-configured to support the WLAN device.

WIRELESS NETWORK CONSIDERATIONS

■

The Intel PRO/Wireless 3945ABG WLAN device sup-

ports IEEE802.11a, IEEE802.11b and IEEE802.11g.

■

Intel Wireless WiFi Link 4965AGN (4965AGN) device

supports IEEE802.11a, IEEE802.11b, IEEE802.11g,

and IEEE802.11n.

■

The WLAN device operates in the 2.4GHz 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 2.4GHz

frequency range as IEEE802.11b/g/n devices. Interfer-

ence by microwaves does not occur with IEEE802.11a

radio which operates in the 5 GHz RF band.

■

Wireless devices that transmit in the 2.4GHz range

may interfere with operation of WLAN devices in

IEEE802.11b/g/n modes. Symptoms of interference

include reduced throughput, intermittent disconnects,

and many frame errors. It is HIGHLY recommended

that these interfering devices be powered off to ensure

proper operation of the WLAN device.

DEACTIVATING THE WLAN DEVICE

Deactivation of the WLAN device may be desired in

certain circumstances (to extend battery life) or where

certain environments require it (i.e. hospitals, clinics,

airplanes, etc.). Fujitsu mobile computers employ three

methods with which to deactivate the WLAN device:

■

Using the Wireless On/Off Switch, or,

■

In Windows Vista, using the WLAN icon in the

taskbar, or,

■

In Windows XP, using the Intel PROSet Software or

Atheros Client Utility software.

Deactivation using the Wireless On/Off Switch

The WLAN device can be deactivated quickly and effi-

ciently by toggling the Wireless On/Off Switch to the Off

position. (Figure A-3)

The Wireless LAN/Bluetooth On/Off

Switch will power off both the optional

wireless LAN and Bluetooth devices at the

same time. To enable or disable either one

of the devices individually, perform the

following steps:

1. Slide the Wireless LAN/Bluetooth on/

off switch to On position.

2. In the Control Panel, double-click the

Fujitsu Radio Control icon.

3. In the window that appears, click the

button associated with Bluetooth and/

or Wireless LAN Status to enable or dis-

able the individual devices.

4. Click [OK].

Figure A-2. Access Point (Infrastructure) Mode Network

ADSL modem,

cable modem,

or similar

Internet

Wired LAN

Access Point*

Wireless LAN

*An optional hub for a wired

LAN may be required depending

upon the type of access point used.

T Series.book Page 95 Wednesday, April 25, 2007 11:29 AM

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