Wireless LAN USB Dongle User’s Manual Ver 1.
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LIMITED WARRANTY This product is warranted by manufacturer to be free from defects in material and workmanship for one (1) year from the date of purchase. During this period if this product is found to be defective in material or workmanship, manufacturer or one of its authorized service facilities will at its option either repair or replace this product without charge, subject to the following conditions, limitations and exclusions: 1. 2. 3. 4.
Table of Contents 1. INTRODUCTION...........................................................................................................................................4 1.1 Features ................................................................................................................................................4 1.2 Applications...........................................................................................................................................4 1.
1. INTRODUCTION Wireless LAN is local area networking without wires, which uses radio frequencies to transmit and receive data between PC’s or other network devices. Wireless LAN is able to configure independent networks and infrastructure networks. The former is suitable for small or temporary peer-to-peer configurations, and the later is offering fully distributed data connectivity via micro cells and roaming.
Notebook with Wireless LAN USB Dongle Notebook with Wireless LAN USB Dongle Desktop PC with Wireless LAN USB Dongle Figure 1-1 802.11 Ad-Hoc Configuration 1.3.2 Infrastructure Configuration An integrated wireless and wired LAN is called an infrastructure configuration. A group of WLAN USB dongles and an Access Point (AP) is called a Basic Service Set (BSS). Each WLAN USB dongle in this BSS can be linked to any computer in the wired LAN infrastructure via the AP.
Desktop PC Desktop PC File Server Hub Access Point Notebook with Wireless LAN USB Dongle Access Point Desktop PC with Wireless LAN USB Dongle Notebook with Wireless LAN USB Dongle Desktop PC with Wireless LAN USB Dongle Notebook with Wireless LAN USB Dongle Notebook with Wireless LAN USB Dongle BSS1 BSS2 ESS Figure 1-2 Infrastructure Configuration The infrastructure configuration supports roaming capability for mobile workers.
File Server ADSL/Cable modem Switch Switch Notebook with Wireless LAN USB Dongle Access Point Access Point Desktop PC with Wireless LAN USB Dongle ESS Figure 1-3 Seamless Roaming 7 Notebook with Wireless LAN USB Dongle
2. INSTALLATION Use the procedures described in this chapter to install your WLAN USB dongle under MS Windows 98/ME/2000 and XP. 2.1 Product Kit Before starting installation, please make sure the WLAN USB dongle package you purchased includes the following four items: 1) WLAN USB dongle. 2) CD-ROM (containing Driver/Utility, and User’s Manual). 3) Quick Start Guide. If anything is missing, please contact your vendor. 2.
3. CONFIGURATION The Configuration & Monitor Utility is a powerful application that helps you to configuration the WLAN USB dongle and monitor the statistics of the communication. Unlike the standard method of configuring the card via the operating system utilities ( e.g. Control Panel), this application permits the dynamic modification of the configuration parameter while the card is operating. It also offers some more configuration options. 3.
Figure 3-2 A typical screen of the Monitor Utility in Infrastructure mode. Note: In Ad-Hoc mode, the Channel and SSID must be the same among stations so that the computers can communicate within the local LAN properly. Moreover, all connected computers should have the same netid and subnetid. Statistics This option enable you to view the available statistics information (Data packets, Management Packets and Rejected packets). In order to renew or update this list of statistics, press the “Reset” button.
Site Survey By choosing the Site Survey option in any of the two modes, you can scan all the channels in order to find all the access points within the range of your card. In Figure 3-4, the card can see four access points. The list includes information about the BSSID and SSID of the access point(s), the signal strength, the channel where the access point(s) operates, and whether or not WEP encryption is used. In order to update this list, press the “Re-scan” button.
Figure 3-5 Encryption Advanced By choosing the Advanced option in any of the two modes, you can change advanced configuration settings, such as the Preamble Type, Fragmentation Threshold, and RTS/CTS Threshold (Figure 3-6). Figure 3-6 shows the recommended configuration for the advanced settings. Before selecting Short Preamble, make sure that the other stations and APs are also supporting this feature.
Version By choosing this option, you can view basic information about the Utility like the Driver, Firmware and Application Version. Use the “Exit” button in order to exit the application.
4. SPECIFICATIONS General Standards compliance Security Compliant IEEE 802.11b Standard WEP 64-bit, 128-bit, encryption MD5 Hardware RF Range Data rate Modulation Coding Number of channels Host Interface Transmit power Receive sensitivity Frequency range: 2.4 ~ 2.4835GHz 11Mbps / 5.5Mbps / 2Mbps / 1Mbps DSSS (Direct Sequence Spread Spectrum) DBPSK/DQPSK 1, 2Mbps: 11 chip/bit Barker Coding 5.
5. GLOSSARY Wireless Access Point (AP) – Any entity that has station functionality and provides access to the distribution services, via the wireless medium (WM) for associated stations. Ad-Hoc – A network composed solely of stations within mutual communication range of each other via the wireless medium (WM). An ad hoc network is typically created in a spontaneous manner. The principal distinguishing characteristic of an ad hoc network is its limited temporal and spatial extent.
