Fujitsu ST4120P, User Manual

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W i r e l e s s L A N U s e r ’s G u i d e
49
BEFORE USING THIS DEVICE
Thank you for purchasing a Fujitsu Stylistic
ST4120P/21P Tablet PC with the Integrated
Wireless LAN. This manual describes the basic
operating procedures for the Wireless LAN
(referred to as the “device” in this manual) and
how to set up a wireless LAN network. Before
using this device, read this manual carefully to
ensure correct operation of the device. Keep
this manual in a safe place for reference while
using the device.
Characteristics of the Device
This device consists of a wireless LAN card
that is attached to the computer via a mini-PCI
slot.
The main characteristics are as follows:
• It uses the power saving communications
system in the 2.4 GHz band, and does not
require any license for radio communication.
• It uses Direct Sequence Spread Spectrum
(DS-SS), which is resistant to noise.
• This device complies with Wi-Fi, and is able
to communicate at the maximum transfer
rate of 11 Mbps.
• The maximum communication range is
approximately 120 feet (36.5 meters) inside
a building. The range may be shorter
depending upon the installation factors, such
as walls and columns.
• Unauthorized access can be prevented with
the use of SSID and encryption key.
Wireless LAN Modes Using this Device
AdHoc Mode
The “AdHoc Mode” refers to the network
connecting two computers using wireless LAN
cards. This connection is called an “AdHoc
network.”
Using an AdHoc network, you can obtain a
network connection easily and at a low cost.
In the AdHoc mode, you can use the function
supported by Microsoft Network, such as File
and Print Sharing to exchange files and share
a printer or other peripheral devices.
To use the AdHoc Mode, you must set the
same SSID and the same encryption key for all
the computers that are connected. All
connected computers can communicate with
each other within the communication range.
Infrastructure Mode
If a number of computers are connected
simultaneously in the AdHoc mode, the
transfer rate may be reduced, communications
may become unstable, or the network
connection could fail. This is because all
wireless LAN cards are using the same radio
frequency in the network.
To improve this situation, you can use a
wireless LAN access point, which is sold
separately. The wireless LAN network is in the
“Infrastructure mode” when it uses an access
point, and such a connection is called the
“Infrastructure Network.”
By using an access point, you can set and use
a different communication channel for each
network group. Each channel is given a
different radio frequency, and it eliminates the
collision of communications and provides a
more stable communications environment.
Infrastructure mode is most suitable when you
are configuring multiple wireless LAN
networks on the same floor.
To connect a wireless LAN network to a wired
LAN, you need an access point.
How to Handle This Device
The optional Integrated Wireless LAN device is
already installed in Fujitsu Stylistic ST4120P/
21P Tablet PC computers that have been so
configured. Under normal circumstances, it
should not be necessary for you to remove or
reinstall it. The LAN has been configured to
support the operating system with which your
system shipped.
The On/Off switch located on the Wireless LAN
cover turns the device on and off. You should
switch the device off when it is not in use in
order to maximize battery life.
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