Fujitsu FPCM20654 User Guide - Page 92

LifeBook P Series Notebook/Tablet PC Before Using the Wireless LAN This manual describes the procedures required to properly 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) ■ Atheros AR5002X (WLL4070) Mini-PCI wireless network card (802.11a + b/g) 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. Both WLAN devices operate in the 2.4GHz Industrial, Scientific, and Medical (ISM) RF band and 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 operating modes, IEEE 802.11a, IEEE 802.11b and IEEE 802.11g. ■ 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 Division Multiplexing (OFDM) when operating in IEEE 802.11a or IEEE 802.11g mode. ■ The WLAN device is Wi-Fi certified and operates at the maximum data transfer rate of 54 Mbps in IEEE 802.11a or IEEE 802.11g mode and 11 Mbps in IEEE 802.11b 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 interference 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 authentication, and encryption key settings are identically configured on all computers in the Ad Hoc network. Figure A-1. Ad Hoc Mode Network 86