Fujitsu Lifebook S7020, Руководство пользователя

Страница: 102 / 130

94
L i f e B o o k S 7 0 0 0 S e r i e s N o t e b o o k - 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 three devices
have been noted in the text:
■
Intel PRO/Wireless 2915ABG (WM3B2915ABG)
Network Connections (802.11a+b/g): Available on
LifeBook S7020 notebook model
■
Atheros AR5002X (WLL4070) Mini-PCI wireless
network card (802.11a + b/g): Available on LifeBook
S7020D notebook model
Characteristics of the WLAN Device
■
The WLAN device is a Mini-PCI card attached to the
main board of the mobile computer.
■
The WLAN devices operate in license-free RF bands,
therefore eliminating the need to procure an FCC
license to operate. All three WLAN devices operate in
the 2.4GHz Industrial, Scientific, and Medical (ISM)
RF band. Additionally, the Intel PRO/Wireless
2915ABG and Atheros AR5002X devices operate in the
lower and middle bands of the 5GHz Unlicensed
National Information Infrastructure (UNII) bands.
■
The Intel PRO/Wireless 2915ABG and Atheros
AR5002X WLAN devices are capable of three operat-
ing modes, IEEE802.11a, IEEE802.11b and
IEEE802.11g.
■
Encoding of data is modulated using Direct Sequence
Spread Spectrum (DSSS) and Complementary Code
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 WLAN device supports the following encryption
methods - WEP, CKIP, TKIP, and AES encryption.
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.
Figure A-1. Ad Hoc Mode Network
S7020.book Page 94 Thursday, May 12, 2005 1:53 PM