Bedienungsanleitung Fujitsu LifeBook E8010 (Seite 105 von 124) (Englisch)

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WIreless LAN User’s Guide

Access Point (Infrastructure) Mode

(See Figure 5-2)

Infrastructure mode refers to a wireless network archi-

tecture in which devices communicate with wireless or

wired network devices through an Access Point. In infra-

structure mode, wireless devices can communicate with

each other or with a wired network. Corporate wireless

networks operate in infrastructure mode because they

require access to the wired LAN in order to access

computers, devices, and services such as file servers,

printers, and databases.

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 WLAN device is a dual-mode wireless net-

work card (supports IEEE802.11b/g); the Atheros

device supports IEEE802.11a/b/g.

■

The Intel WLAN device operates in the 2.4GHz ISM

band; the Atheros WLAN device also operates in the 5

GHz lower and middle UNII bands.

■

The maximum range of the WLAN device indoors is

typically 80 feet (25 meters). Please note that the max-

imum range you achieve may be shorter or longer than

80 feet, depending on factors such as access point

transmit power, number and density of obstructions,

or external RF interference.

■

Microwave ovens will interfere with the operation of

WLAN device as microwave ovens operate in the same

2.4GHz frequency range that IEEE802.11b/g devices

operate in. 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 fre-

quency range may interfere with the operation of

WLAN devices in IEEE802.11b/g modes. Interference

symptoms include reduced throughput, intermittent

disconnects, and large amounts of frame errors. It is

HIGHLY recommended that 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 two

methods with which to deactivate the WLAN device, 1)

the Wireless On/Off Switch and 2) in Windows 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 LAN/Bluetooth On/Off

Switch to the Off position. (Figure 5-3)

Figure 5-2. 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.

E Series.book Page 97 Friday, May 14, 2004 1:25 PM

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