Before Using The Wireless Lan; Wireless Lan Modes Using This Device - Fujitsu Lifebook T4010 User Manual

L i f e B o o k T S e r i e s T a b l e t P C - A p p e n d i x

Before Using the Wireless LAN

This manual describes the procedures required to prop-
erly setup and configure the integrated Wireless LAN
Mini-PCI device (referred to as "WLAN device" in the
rest of the manual). Before using the WLAN device, read
this manual carefully to ensure it's correct operation.
Keep this manual in a safe place for future reference.
Wireless LAN Devices 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 card (WM3B2200BG)
■
Atheros Wireless LAN card (WLL4030)
■
Characteristics of the WLAN Device
The WLAN device is a Mini-PCI card attached to the
■
main board of the mobile computer.
It is a dual-band radio that operates in two license-free
■
RF bands, therefore eliminating the need to procure an
FCC license to operate. It operates in the 2.4 GHz
Industrial, Scientific, and Medical (ISM) RF band.
Additionally, the Atheros device operates in the lower
and middle bands of the 5 GHz Unlicensed National
Information Infrastructure (UNII) bands (for
IEEE802.11a).
The Atheros WLAN is capable of three operating
■
modes, IEEE802.11a, IEEE802.11b and IEEE802.11g,
wireless LAN standards governed by the IEEE (Insti-
tute of Electronics and Electrical Engineers). The Intel
(WM3B2200BG) WLAN is capable of two operating
modes, IEEE802.11b and IEEE802.11g. The Intel
(WM3B2100) is capable of one operating mode,
IEEE802.11b.
Encoding of data is modulated using Direct Sequence
■
Spread Spectrum (DSSS) and Complementary Code
Figure A-1. Ad Hoc Mode Network
96
Keying (CCK) when the WLAN device is operating in
IEEE 802.11b mode and Orthogonal Frequency Divi-
sion Multiplexing (OFDM) when operating in
IEEE802.11a or IEEE802.11g mode.
The WLAN device is Wi-Fi certified and operates at
■
the maximum data transfer rate of 54 Mbps in
IEEE802.11a or IEEE802.11g mode and 11 Mbps in
IEEE802.11b mode.
The maximum communication range indoors is
■
approximately 80 feet (25 meters). However, that
range will increase or decrease depending on factors
such as number of walls, reflective material, or inter-
ference from external RF sources.
The specific WLAN devices supports all of the encryp-
■
tion methods - WEP, TKIP, and AES. The WLAN
device may also support the following data-link layer
security mechanisms - LEAP, EAP-TLS, EAP-TTLS,
and PEAP.

WIRELESS LAN MODES USING THIS DEVICE

Ad Hoc Mode
(See Figure A-1)
"Ad Hoc Mode" refers to a wireless network architecture
where wireless network connectivity between multiple
computers is established without a central wireless
network device, typically known as Access Point(s).
Connectivity is accomplished using only client devices in
a peer-to-peer fashion. That is why Ad Hoc networks are
also known as peer-to-peer networks. Ad Hoc networks
are an easy and inexpensive method for establishing
network connectivity between multiple computers.
Ad Hoc mode requires that the SSID, network authenti-
cation, and encryption key settings are identically
configured on all computers in the Ad Hoc network.