Fujitsu Lifebook T4020, User Manual

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97
W i r e l e s s L A N U s e r ’ s G u i d e
Access Point (Infrastructure) Mode
(See Figure A-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 WLAN devices support IEEE802.11a+b/g.
■
The devices operate in the 2.4GHz ISM band 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.
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:
■
Using the Wireless On/Off Switch, or,
■
In Windows, using the Intel PROSet Software or
Atheros Client Utility software.
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 97 Thursday, July 14, 2005 2:24 PM