Fujitsu Lifebook E4010 User Manual Download

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L i f e B o o k E S e r i e s N o t e b o o k

Before Using the Wireless LAN

The Integrated Wireless LAN is an optional device avail-
able for Fujitsu mobile computers. 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 oper-
ation of the device. Keep this manual in a safe place for
reference while using the device.

Types of Wireless LANs Covered by this Document

This document is applicable to systems containing one
of the following two devices. Most of the procedures are
identical. Sections that differ between the two devices
have been noted in the text:

■

Intel PROSet Wireless LAN

■

Broadcom Wireless LAN

To determine which device is present in your system,
click [Start] -> [Settings (Windows 2000 only)] ->
Control Panel. If there is an icon named “Intel PROSet”,
you have the Intel device; if there is an icon named
“Broadcom Wireless Utility”, you have the Broadcom
device.

Characteristics of the Device

This device consists of a wireless LAN card that is
attached inside 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

■

It does not require any license for radio communica-
tion.

■

It uses Direct Sequence Spread Spectrum (DS-SS), an
RF modulation scheme that is resistant to noise.

■

This device complies with Wi-Fi, and is able to com-
municate at the maximum transfer rate of 11 Mbps.

■

The maximum communication range is approxi-
mately 80 feet (25 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
an SSID and an encryption key (also known as a WEP
key).

Wireless LAN Modes Using this Device

Ad Hoc Mode

(See Figure 1)

The “Ad Hoc Mode” refers to the network connecting
two computers using wireless LAN cards. This connec-
tion is called an “Ad Hoc network.”

Using an Ad Hoc network, you can obtain a network
connection easily and at a low cost.

In the Ad Hoc 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 Ad Hoc Mode, you must set the same SSID
and the same encryption key for all the computers that
are connected. All connected computers can communi-
cate with each other within the communication range.

Infrastructure Mode

(See Figure 2)

If a number of computers are connected simultaneously
in the Ad Hoc 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.

Figure 1. Ad Hoc Mode Network

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