Allied Telesis AT-WCU200G User Manual

USB 2.0 Adapter

◆

User’s Guide

AT-WCU200G 54Mbps

®

Wireless Adapter

FOR WINDOWS 98/ME/XP/2000

VERSION 1.0.0

PN 613-50653-00 Rev A

Copyright © 2004 Allied Telesyn, Inc.

All rights reserved. No part of this publication may be reproduced without prior written permission from Allied Telesyn, Inc.

Windows 95, Windows 98, Windows 2000, Windows Me, Windows NT and Windows XP are either registered trademarks or
trademarks of Microsoft Corporation in the United States and/or other countries.

Netscape and the Netscape N and Ship's Wheel logos are registered trademarks of Netscape Communications Corporation in the
U.S. and other countries. Netscape Navigator is also a trademark of Netscape Communications Corporation and may be registered
outside the U.S.

All other product names, company names, logos or other designations mentioned herein are trademarks or registered trademarks
of their respective owners.

Allied Telesyn, Inc. reserves the right to make changes in specifications and other information contained in this document without
prior written notice. The information provided herein is subject to change without notice. In no event shall Allied Telesyn, Inc. be
liable for any incidental, special, indirect, or consequential damages whatsoever, including but not limited to lost profits, arising
out of or related to this manual or the information contained herein, even if Allied Telesyn, Inc. has been advised of, known, or
should have known, the possibility of such damages.

AT-WCU200G User’s Guide

Regulatory Notes and Statements

Wireless LAN,

Health and

Authorization

For Use

Regulatory

Information

and

Disclaimers

Radio frequency electromagnetic energy is emitted from Wireless LAN
devices. However, the energy levels of these emissions are far less than
the electromagnetic energy emissions from similar wireless devices such
as mobile phones. Wireless LAN devices are safe for use frequency safety
standards and recommendations. The use of Wireless LAN devices may
be restricted in some situations or environments for example:

❑ On board airplanes

❑ In an explosive environment

❑ If the interference risk to other devices or services is perceived or

identified as harmful

If the policy regarding the use of Wireless LAN devices in specific
organizations or environments (for example, airports, hospitals,
chemical/oil/gas industrial plants, or private buildings, etc.) is not clear,
please ask for authorization to use these devices prior to operating the
equipment.

Installation and use of this Wireless LAN device must be in strict
accordance with the instructions included in the user documentation
provided with the product. Any changes or modifications made to this
device that are not expressly approved by the manufacturer may void
the user’s authority to operate the equipment. The Manufacturer is not
responsible for any radio or television interference caused by
unauthorized modification of this device, of the substitution or
attachment. The manufacturer and its authorized resellers or distributors
will assume no liability for any damage or violation of government
regulations arising from failing to comply with these guidelines.

USA-FCC

(Federal

Communications

Commission)

Statement

CE Caution European standards dictate the maximum radiated transmit power of

This device complies with Part 15 of FCC Rules. Operation of this device
is subject to the following two conditions:

1. This device may not cause harmful interference

2. This device must accept any interference received, including
interference that may cause undesired operations.

100mW EIRP and a frequency range of 2.400-2.4835GHz. In France, the
equipment must be restricted to the 2.4465-2.4835GHz frequency range
and must be restricted to indoor use.

iii

Regulatory Notes and Statements

The following equipment: AT-WCU200G 54Mbps Wireless USB 2.0
Adapter.

Is herewith confirmed to comply with the requirements set out in the
Council Directive on the Approximation of the Laws of the Member
States relating to the Electromagnetic Compatibility (89/336/EEC). Low­voltage Directive (72/23/ECC) and the Amendment Directive
(93/68/EEC), the procedures given in European Council Directive
99/5/EC and 89/3360EEC.

The equipment passed. The test was performed according to the
following European standards:

❑ EN 300 328 V.1.4.1 (2003-04)

❑ EN 301 489-1 V.1.3.1 (2001-09) / EN 301 489-17 V.1.1.1 (2000-09)

❑ EN 50371: 2002

❑ EN 60950: 2000

iv

AT-WCU200G User’s Guide

FCC Radio

Frequency

Exposure

Statement

FCC

Interference

Statement

This Wireless LAN radio device has been evaluated under FCC Bulletin
OET 65 and found compliant to the requirements as set forth in CFR 47
Sections 2.1091, 2.1093, and 15.247 (b) (4) addressing RF Exposure from
radio frequency devices.

FCC RF Radiation Exposure Statement: This equipment complies with
the FCC RF radiation limits set forth for an uncontrolled environment.
This device and its antenna must not be co-located or operating in
conjunction with any other antenna or transmitter.

This equipment has been tested and found to comply with the limits for
a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful
interference in a residential installation.

This equipment generates, uses, and can radiate radio frequency energy.
If not installed and used in accordance with the instructions, it may
cause harmful interference to radio communications.

However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference
to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try and correct the
interference by one or more of the following measures:

Export

Restrictions

1. Reorient or relocate the receiving antenna.

2. Increase the distance between the equipment and the receiver.

3. Connect the equipment to an outlet on a circuit different from that
to which the receiver is connected.

4. Consult the dealer or an experienced radio/TV technician for help.

This product or software contains encryption code that may not be
exported or transferred from the US or Canada without an approved US
Department of Commerce export license.

Safety Information

Your device contains a low power transmitter. When device is
transmitted it sends out radio frequency (RF) signal.

v

Regulatory Notes and Statements

CE Mark

Warning

This is a Class B product. In a domestic environment, this product may
cause radio interference, in which case the user may be required to take
adequate measures.

Protection Requirements for Health and Safety - Article 3.1a

Testing for electric safety according to EN60950 has been conducted.
These are considered relevant and sufficient.

Protection Requirements for Health and Safety - Article 3.1b

Testing for electromagnetic compatibility according to EN301 489-1,
EN301 489-17 and EN55024 has been conducted. These are considered
relevant and sufficient.

Effective Use of the Radio Spectrum - Article 3.2

Testing for radio test suites according to EN300 328-2 has been
conducted. These are considered relevant and sufficient.

vi

Table of Contents

Regulatory Notes and Statements ............................................................................................................................................................. iii

Wireless LAN, Health and Authorization For Use ............................................................................................................................... iii

Regulatory Information and

Disclaimers ............................................................................................................................................................................................................... iii

USA-FCC (Federal Communications Commission) Statement...................................................................................................... iii

CE Caution........................................................................................................................................................................................................ iii

FCC Radio Frequency Exposure Statement .......................................................................................................................................... v

FCC Interference Statement ....................................................................................................................................................................... v

Export Restrictions ......................................................................................................................................................................................... v

CE Mark Warning ........................................................................................................................................................................................... vi

Preface ..................................................................................................................................................................................................................... ix

How This Guide is Organized ............................................................................................................................................................................. x

Document Conventions ..................................................................................................................................................................................... xi

Where to Find Related Guides .........................................................................................................................................................................xii

Contacting Allied Telesyn ................................................................................................................................................................................ xiii

Online Support .............................................................................................................................................................................................xiii

E-mail and Telephone Support ..............................................................................................................................................................xiii

Returning Products.....................................................................................................................................................................................xiii

For Sales or Corporate Information ...................................................................................................................................................... xiii

Obtaining Management Software Updates ...................................................................................................................................... xiii

Tell Us What You Think.............................................................................................................................................................................. xiii

Installing the AT-WCU200G Wireless Adapter ......................................................................................................................................1

Introduction ............................................................................................................................................................................................................. 1

Ad-hoc Mode ................................................................................................................................................................................................... 2

Infrastructure Mode....................................................................................................................................................................................... 3

Before you Install .................................................................................................................................................................................................... 4

Package Contents........................................................................................................................................................................................... 4

System Requirements ................................................................................................................................................................................... 4

Installing the AT-WCU200G Software Driver and the

AT-WCU200G Wireless Adapter ........................................................................................................................................................................ 5

Installing the AT-WCU200G Software Driver........................................................................................................................................ 5

Installing the AT-WCU200G Wireless Adapter ..................................................................................................................................... 8

Confirming Software Installation............................................................................................................................................................11

AT-WCU200G Wireless Configuration Utility .............................................................................................................................................12

One-Button Quick Connection ................................................................................................................................................................13

Configuring the Wireless Client Manager Settings ..........................................................................................................................16

Configuring Network Profiles ..................................................................................................................................................................18

vii

Table of Contents

Configuring the Profile Edit Screen....................................................................................................................................................... 21

Uninstalling the AT-WCU200G Wireless Adapter .................................................................................................................................... 29

Windows XP Wireless Configuration ............................................................................................................................................................ 30

Configuring Wireless Network Clients ................................................................................................................................................. 30

Connecting to a Network.......................................................................................................................................................................... 32

Configuring Wireless Network Authentication Settings ...............................................................................................................34

Data Encryption............................................................................................................................................................................................ 35

Configure WPA ............................................................................................................................................................................................. 36

Configure WPA-PSK on Windows XP.................................................................................................................................................... 39

Technical Specifications .................................................................................................................................................................................... 42

Regulatory Domains ........................................................................................................................................................................................... 44

viii

Preface

This manual provides a description of the Allied Telesyn AT-WCU200G
54Mbps Wireless USB 2.0 Adapter and contains information about how
to install and configure this product.

ix

Preface

How This Guide is Organized

This guide contains the following sections:

Introduction, describes the AT-WCU200G wireless adapter.

Before you Install

, helps you get started with the basic installation of the

AT-WCU200G wireless adapter.

Installing the AT-WCU200G Software Driver

, describes the LEDs of the

adapter.

Installing the AT-WCU200G Software Driver, tell how to setup the driver

and the utility settings.

AT-WCU200G Wireless Configuration Utility

, provides information and

instructions for Windows 98/ME/2000 wireless configuration.

Windows XP Wireless Configuration

, provides information and

instructions for Windows XP wireless configuration.

Technical Specifications, lists the technical (general, physical and

environmental) specifications of the AT-WCU200G wireless adapter.

Regulatory Domains, lists the IEEE 802.11g channels.

x

Document Conventions

This guide uses several conventions that you should become familiar
with before you begin to install the product.

Note

Notes provide additional information.

Warning

Warnings inform you that performing or omitting a specific action
may result in bodily injury.

Caution

Cautions inform you that performing or omitting a specific action
may result in equipment damage or loss of data.

AT-WCP200G User’s Guide

xi

Preface

Where to Find Related Guides

The Allied Telesyn web site at www.alliedtelesyn.com offers you an
easy way to access the most recent documentation, software updates,
and technical information for all of our products. The documents
provided on our web site are available as PDF files.

xii

AT-WCP200G User’s Guide

Contacting Allied Telesyn

This section provides Allied Telesyn contact information for technical
support as well as sales or corporate information.

Online Support You can request technical support online by accessing the Allied Telesyn

Knowledge Base from the following web site:
www.alliedtelesyn.com/kb.

You can use the Knowledge Base to submit questions to our technical
support staff and review answers to previously asked questions.

E-mail and
Telephone

Support

Returning

Products

For Sales or

Corporate

Information

Obtaining

Management

Software

Updates

For Technical Support via e-mail or telephone, refer to the “Support &
Services” section of the Allied Telesyn web site at
www.alliedtelesyn.com.

Products for return or repair must first be assigned a Return Materials
Authorization (RMA) number. A product sent to Allied Telesyn without a
RMA number will be returned to the sender at the sender’s expense.

To obtain a RMA number, contact Allied Telesyn’s Technical Support at
our web site at www.alliedtelesyn.com

You can contact Allied Telesyn for sales or corporate information at our
web site at www.alliedtelesyn.com. To find the contact information for
your country, select “Contact Us” then “Worldwide Contacts”.

New releases of management software for our managed products can
be downloaded from either of the following Internet sites:

❑ Allied Telesyn web site: www.alliedtelesyn.com

❑ Allied Telesyn FTP server: ftp://ftp.alliedtelesyn.com

Tell Us What

You Think

If you would prefer to download new software from the Allied Telesyn
FTP server from your workstation’s command prompt, you will need FTP
client software and you will be asked to log in to the server. Enter
‘anonymous’ as the user name and your e-mail address for the password.

If you have any comments or suggestions on how we might improve this
or other Allied Telesyn documents, please fill out the General Enquiry
Form online. This form can be accessed by selecting “Contact Us” from
www.alliedtelesyn.com.

xiii

Preface

xiv

Installing the AT-WCU200G Wireless Adapter

Introduction

The AT-WCU200G wireless adapter is a standards-based wireless
product. See Figure 1. It can communicate with other devices enabled
for 802.11g and 802.11b standards-based wireless LAN connectivity. The
wireless adapter is fully compatible with the IEEE 802.11b RFC, so it can
be connected to your existing 802.11b-compliant devices.

402

Figure 1 AT-WCU200G Wireless Adapter

You can integrate the wireless adapter into an existing network by using
one of the following configurations:

❑ The ad-hoc mode which allows you to connect two PCs with a

wireless connection.

❑ The infrastructure mode which allows you to connect a PC with an

access point.

1

Ad-hoc Mode In the ad-hoc mode, you can enable a wireless connection between two

PCs. To accomplish this, you need one AT-WCU200G wireless adapter for
each PC. See Figure 2.

You can use a USB cable to connect the AT-WCU200G wireless adapter
to a workstation or laptop. Or, you can connect the AT-WCU200G
wireless adapter directly to the USB port on your PC.

400

Figure 2 Ad Hoc Mode

2

AT-WCU200G User’s Guide

Infrastructure

Mode

In the Infrastructure mode, you can use an access point to facilitate the
wireless connection between two PCs. See Figure 3.

Access Point

401

Figure 3 Infrastructure Mode

This chapter provides the following sections:

❑ Before you Install on page 4

❑ Installing the AT-WCU200G Software Driver and the AT-WCU200G

Wireless Adapter on page 5

❑ AT-WCU200G Wireless Configuration Utility on page 12

❑ Uninstalling the AT-WCU200G Wireless Adapter on page 30

❑ Windows XP Wireless Configuration on page 31

❑ Technical Specifications on page 43

❑ Regulatory Domains on page 45

3

Before you Install

This section describes what to do before you install the AT-WCU200G
wireless adapter. It includes:

❑ Package Contents on page 4

❑ System Requirements on page 4

Package

Contents

System

Requirements

Open the AT-WCU200G wireless adapter box and unpack it carefully. The
box contains the following items:

❑ One AT-WCU200G wireless adapter

❑ One USB extension cable

❑ One CD-ROM

❑ One copy of this manual (on the CD ROM)

If any item is found missing or damaged, please contact your local
reseller for replacement.

Before you install an AT-WCU200G wireless adapter, make sure your PC
has the following components:

❑ An USB port

❑ The Windows 98SE/ME/200/XP Operating System

❑ A CD ROM drive

The CD ROM drive is required for software installation.

Note

An USB 2.0 port is required to operate the AT-WCU200G wireless
adapter at date rates of 54Mbps operation and below. An USB 1.1
port delivers at data rates of 11Mbps and below.

4

Installing the AT-WCU200G Software Driver and the AT-WCU200G Wireless Adapter

To install the AT-WCU200G wireless adapter, you first install the software
drivers that are provided on the CD ROM. Then insert the wireless
adapter into your PC. Confirm that the software is installed by looking
for the ATI icon. See the following procedures:

❑ Installing the AT-WCU200G Software Driver on page 5

❑ Installing the AT-WCU200G Wireless Adapter on page 8

❑ Confirming Software Installation on page 11

AT-WCU200G User’s Guide

Installing the
AT-WCU200G

Software Driver

To install the AT-WCU200G software driver on a Windows
98/ME/2000/XP Operating System, perform the following procedure.

1. Turn on your computer.

2. Insert either the AT-WCU200G/NA or AT-WCU200G/EU CD ROM into
the CD ROM drive.

If the AT-WCU200G Software Driver Window is displayed, as shown
in Figure 4, go to step 5. If it is not displayed, go to step 3.

Figure 4 AT-WCU200G Software Driver Window

5

3. From the Windows Start Menu, select Run.

The Run window is displayed.

4. Type the following:

D:\Setup.exe

where the D:\ drive is your CD ROM Drive.

5. Click Install Driver Utility.

The Welcome screen is displayed. See Figure 5.

Figure 5 Welcome Screen

6. Click Next.

6

AT-WCU200G User’s Guide

The Choose Destination Location screen is displayed. See Figure 6.

Figure 6 Choose Destination Location Screen

If you want to install the software in another folder, click Browse
and then select a folder.

7. Click Next.

8. If you purchased the AT-WCU200G/EU CD ROM, the
Country/Domain Selection screen is displayed. See Figure 7. If you
purchased the AT-WCU200G/NA CD ROM, go to step 10.

Figure 7 Country/Domain Selection Screen

7

9. Select the Channel for your country. Then click Next.

A screen is displayed that states installation is in process. Then the
Installation Complete screen is displayed See Figure 8.

Installing the
AT-WCU200G

Wireless

Adapter

Figure 8 Installation Complete Screen

10. Click Finish to complete the installation.

This section provides an installation procedure for the AT-WCU200G
wireless adapter and information about the LEDs. Install the wireless
adapter after you have installed the AT-WCU200G Wireless
Configuration utility.

To install the AT-WCU200G wireless adapter in your laptop or
workstation, perform the following procedure.

1. Remove the AT-WCU200G/NA or AT-WCU200G/EU Installation CD
from the CD ROM drive.

2. Remove the plastic cover from the AT-WCU200G wireless adapter.

Choose one of the following:

- Insert the AT-WCU200G wireless adapter into an available USB port
on your computer.

8

AT-WCU200G User’s Guide

- Insert the USB cable into the AT-WCU200G wireless adapter. See
Figure 9. Then connect the other end of the USB cable into an
available USB port on your computer.

410

Figure 9 Connecting the USB Cable

The Welcome to the Found New Hardware Wizard screen is
displayed. See

Figure 10.

Figure 10 Welcome to the Found New Hardware Wizard Screen

3. Click Install the software automatically (Recommended) and
then click Next.

9

A screen is displayed that states installation is in process. Then the
Completing the Found New Hardware Wizard screen is displayed.
See Figure 11.

Figure 11 Completing the Found New Hardware Wizard Screen

4. Select Finish to complete the AT-WCU200G wireless adapter
Installation.

AT-WCU200G LEDs

The AT-WCU200G wireless adapter contains two LEDs. See Table 1.

Table 1 AT-WCU200G Wireless Adapter LEDs

LED Color Function

Link

ACT

Green On: Indicates the wireless adapter is

connected
Off: Indicates there is no connection

Green Blinking: Indicates the wireless adapter is

receiving or transmitting data

10

AT-WCU200G User’s Guide

Confirming

Software

Installation

After you install the AT-WCU200G software driver, the Allied Telesyn AT­WCU200G Wireless Client Manager icon is displayed in your Windows
System Tray. This icon is located in the bottom right hand corner of the
Windows desktop screen, next to the time display. See Figure 12.

1. Click the icon to start the AT-WCU200G Wireless Configuration
utility.

Figure 12 Allied Telesyn Wireless Client Manager Icon in System Tray

Setting Wireless Settings For WinXP Users

If your PC has the WinXP Operating System, you have a choice of how to
configure the AT-WCU200G wireless adapter.

The AT-WCU200G wireless adapter allows you to configure the wireless
settings using either the AT-WCU200G Wireless Configuration utility or
the WIndows WIndows Configuration utility. By choosing the WIndows
Configuration utility, you can allow Windows to set your wireless
settings automatically.

To use the Windows XP built-in configuration tool, perform the
following procedure:

1. Click the Allied Telesyn Client Manager icon (see below), to start the
AT-WCU200G Wireless Configuration utility. This icon appears in the
system tray.

Figure 13 Allied Telesyn Wireless Client Manager Icon in System Tray

The Wireless Zero Configuration dialogue box is displayed. See
Figure 14.

Figure 14 Wireless Zero Configuration Dialogue Box

11

2. Choose one of the following:

- Click Yes to start the AT-WCU200G Wireless Configuration utility.
Then refer to the procedure described in AT-WCU200G Wireless

Configuration Utility on page 12.

- Click No to start the Windows Wireless Zero Configuration utility.
Then refer to the procedure described in Windows XP Wireless

Configuration on page 31.

AT-WCU200G Wireless Configuration Utility

If you want to change the default settings of the AT-WCU200G Software
drivers or optimize their performance, you can use the AT-WCU200G
Wireless Configuration utility. If your PC is equipped with the Windows
XP Operating System, you can also use the Windows Configuration
Utility (Zero Configuration). See Windows XP Wireless Configuration on
page 31.

To start the AT-WCU200G Wireless Configuration utility and connect to
another PC or an access point, perform the following procedure.

1. Double-click the AT-WCU200G Wireless Configuration utility
AT-WCU200G Wireless Configuration utility icon that appears in the
task bar at the bottom of the window. See the following icon.

The Allied Telesyn AT-WCU200G Wireless Client Manager screen is
displayed. The Status Tab is selected automatically. See

Figure 15 on

page 13

12

AT-WCU200G User’s Guide

.

One-Button

Quick

Connection

Figure 15 Allied Telesyn Wireless Client Manager, Status Tab

For information about how to use the Allied Telesyn AT-WCU200G
Client Manager to configure the wireless adapter, see the following
sections.

❑ One-Button Quick Connection on page 13

❑ Configuring the Wireless Client Manager Settings on page 16

You can connect the AT-WCU200G wireless adapter on your computer
to another device by selecting a button from the Allied Telesyn AT­WCU200G Wireless Client Manager window. See Figure 15 on page 13.
The PC->AP button allows you to connect to an access point or wireless
router in the infrastructure mode. The PC->PC button allows you to
connect to another USB adapter equipped computer in the Ad-hoc
mode.

In addition, this section provides a procedure on how to reconnect to
the Allied Telesyn Wireless Client Manager.

See the following procedures:

❑ Connecting to an Access Point on page 14

❑ Connecting to a PC on page 14

❑ Reconnecting the AT-WCU200G Wireless Adapter on page 15

13

Connecting to an Access Point

To connect your AT-WCU200G wireless adapter to an access point,
perform the following procedure.

1. Click following icon at the bottom right hand corner of your screen.

The Allied Telesyn Wireless Client Manager screen is displayed with
the Status Tab selected. See Figure 15 on page 13.

2. Click the PC->AP button.

This creates a quick connection with the access point in your
wireless environment.

The AT-WCU200G wireless adapter searches your wireless
environment. It chooses the access point with the strongest signal
strength and no security setting to make the connection.

Connecting to a PC

To connect your AT-WCU200G wireless adapter to another PC equipped
with a USB adapter for peer-to-peer communication, perform the
following procedure.

1. Make sure both computers are equipped with USB adapters and are
working properly.

2. Click the following icon at the bottom right hand corner of your
screen.

The Allied Telesyn Wireless Client Manager screen is displayed with
the General Tab selected. See

3. On the computer you are connecting to, click the Wireless Client
Manager icon at the bottom right hand corner of the screen.

4. On each computer, click on the PC->PC button.

Figure 15 on page 13.

14

AT-WCU200G User’s Guide

Wait approximately 1 minute for both computers to make the
wireless network connection.

5. Double click My Network Places icon on your Windows desktop.

See the following icon.

The Network Tasks window is displayed.

6. Click View workgroup computers.

Windows displays a message that both computers are in the same
workgroup.

Now you can access shared files or a printer over a Microsoft
network from either computer.

Reconnecting the AT-WCU200G Wireless Adapter

After you have closed the Allied Telesyn AT-WCU200G Client Manager
screen, use the following procedure to reconnect to it.

1. Click on the Allied Telesyn icon on the desktop. See the following
icon.

The following icon is displayed in the system tray, next to the time
of day.

2. Click the bar graph icon.

The Allied Telesyn AT-WCU200G Client Manager screen is displayed.

Figure 15 on page 13.

See

15

Configuring the

Wireless Client

Manager

Settings

You can use the Wireless Client Manager to customize your wireless
connections settings. This section provides descriptions of the following
Tabs:

❑ Status

❑ Site Survey

❑ Configuration

❑ Host Information

❑ Version Information

To access the Allied Telesyn AT-WCU200G Wireless Client Manager,
perform the following procedure:

1. Click the following icon at the bottom right hand corner of your
screen.

The Allied Telesyn Wireless Client Manager screen is displayed with
the Status Tab selected. See Figure 15 on page 13.

Note

If the AT-WCU200G Wireless Configuration utility icon does not
appear in the system tray, do one of the following:

- Double-click the desktop AT-WCU200G Wireless Configuration
utility icon.

- Select Start, Programs, Allied Telesyn AT-WCU200G Wireless
Utility, and AT-WCU200G Wireless Configuration Utility.

2. See the following sections for configuration information regarding
the Tabs.

16

AT-WCU200G User’s Guide

Status Tab

The Status tab contains general information about the AT-WCU200G
wireless adapter connection, including transmission rate and network
type. To access the Status Tab, see the procedure described in

Configuring the Wireless Client Manager Settings on page 16. See Figure

15 on page 13.

Configure the following settings as needed:

❑ Profile Name: Displays the settings of the current user.

❑ SSID: The Service Set Identifier is the name assigned to the

wireless network.

❑ Link Status: Displays the connection status with existing wireless

devices.

❑ Network Type: Displays the mode currently in use, either 802.11

Infrastructure mode or Ad-hoc mode.

❑ Security Type: Displays the mode currently in use.

❑ Channel: Indicates which channel is currently in use.

❑ Tx Rate: Indicates the data transfer rate between the node and

another device.

❑ Link Quality/Signal Strength: Indicates the signal strength of

the radio frequency signal received by the wireless node.

Note

If the USB port on your computer supports the USB 1.1 standard
only, the maximum throughput rate of the AT-WCU200G wireless
adapter is 11Mbps.

17

Configuring

Network

Profiles

You can configure network profiles from the Site Survey screen. From
this screen, you can do the following:

❑ View Available Networks

❑ Create a Profile

❑ Edit a profile

❑ Delete a profile

To configure network profiles, perform the following procedure:

1. Click the following icon at the bottom right hand corner of your
screen.

The Allied Telesyn Wireless Client Manager screen is displayed with
the Status Tab selected. See Figure 15 on page 13.

2. Click the Site Survey Tab from the AT-WCU200G Wireless Client
Manager screen. The Site Survey screen is displayed. See Figure 16.

18

Figure 16 Site Survey Screen

AT-WCU200G User’s Guide

In the Site Survey window, the Available Network area includes the
following fields. Move the scroll bar to the right to see all of the fields.
This window is for display purposes only.

❑ Mode: Indicates either the access point or Ad-hoc mode is

currently in use.

❑ BSSID: Indicates the MAC address of a wireless router or access

point which you can connect to.

❑ SSID: Indicates the SSID (Service Set Identification). This is a 32-bit

alphanumeric character name that is assigned to the wireless
network.

❑ Encryption: Indicates the type of encryption implemented. To

modify the Encryption setting, see Setting Encryption on page 22.

❑ Ch: Indicates which channel is currently in use.

❑ Type: Indicates the AT-WCU200G wireless adapter is in either the

802.11g or 802.11 mode.

❑ Signal Strength: Indicates the wireless signal between the access

point and AT-WCU200G wireless adapter.

Creating a Network Profile

To create a new profile, perform the following procedure from the Site
Survey screen:

1. Click Refresh.

2. Select a network from the Available Networks area.

3. Click New.

The Profile Edit screen is displayed.

19

Figure 17 Profile Edit with General Tab Selected

For information about how to configure this screen, Configuring the

Profile Edit Screen on page 21.

Editing a Network Profile

To edit a profile, perform the following procedure from the Site Survey
screen:

1. Click Refresh.

2. Select a profile from the Profile Name area. Double click on it.

The Profile Edit screen is displayed. See Figure 17 on page 20. For
information about how to configure this screen, Configuring the

Profile Edit Screen on page 21.

20

AT-WCU200G User’s Guide

Deleting a Network Profile

To delete a profile, perform the following procedure from the Site Survey
screen:

1. Click on a profile from the Profile Name area.

Note

You cannot delete the active profile.

2. Click Delete.

Configuring the

Profile Edit

Screen

The Profile Edit screen allows you to create and edit network profiles.
This screen contains the following tabs:

❑ General

❑ Encryption

❑ Advanced

Note

If you want to modify the network profile settings and you are
unsure of the information, consult your MIS staff.

Configuring General Information

The General Tab on the Profile Edit page allows you to assign a profile
name and SSID. It also displays the network type, channel, and
transmission rate.

The Profile Edit screen is displayed in Figure 17 on page 20. The General
Tab is selected automatically. To display the Profile Edit screen, see

Configuring Network Profiles

on page 18.

1. Configure the following fields in the General Tab as needed:

❑ Profile name: Indicates the network settings currently in use.

❑ SSID: Indicates the name assigned to the wireless network.

❑ Network Type: Click on the pull down menu. Displays the mode

in current use, either 802.11 Infrastructure mode or Ad-hoc mode.

❑ Channel: Indicates which channel is currently in use. The default

setting is 6. In Ad-hoc mode, you must set both PCs to the same
channel. The wireless adapter selects the channel to match the
channel setting on the selected access point automatically.

21

❑ Tx Rate: Indicates the data transfer rate between the node and

another device. The default is Auto. The Tx Rate is determined by
the AT-WCU200G wireless adapter automatically, depending on
the distance to the access point or wireless router.

2. Click Okay.

Setting Encryption

This section discusses how to set the following authentication and
encryption modes:

❑ WEP (Wired Equivalent Privacy)

❑ WPA (Wi-Fi Protected Access)

❑ WPA-PSK (Wi-Fi Protected Access and Private Shared Key)

❑ TLS (Transport Layer Security protocol)

❑ PEAP (Protected Extensible Authentication protocol)

❑ TKIP (Temporal Key Integrity Protocol)

❑ AES (Advanced Encryption Standard encryption mode)

For more information about the authentication and encryption modes,
see Configuring Wireless Network Authentication Settings on page 35
and Data Encryption on page 36.

To display the Profile Edit screen, see Configuring Network Profiles on
page 18. This screen is displayed in Figure 17 on page 20.

To set the encryption mode for the AT-WCU200G wireless adapter,
perform the following procedure:

1. Click the following icon at the bottom right hand corner of your
screen.

The Allied Telesyn Wireless Client Manager screen is displayed with
the Status Tab selected. See

Figure 15 on page 13.

22

AT-WCU200G User’s Guide

Choose one of the following:

- To configure encryption on a new network profile, perform steps 2
and 3.

- To edit an existing network profile, perform steps 4 and 5.

2. Click Configuration on the side bar on the Allied Telesyn
AT-WCU200G Wireless Client Manager.

3. Click Encryption.

The Encryption tab is displayed. See Figure 18.

Figure 18 Encryption Tab

4. Configure the following fields as needed:

❑ Authentication Mode: Indicates the security mode. The settings

you choose here must match the access point or wireless client
that you are connecting to. Choose from the following options:

- Open: Communicates the key across the network

- Shared: Allows communications only with other devices with
identical WEP settings.

- Auto: Automatically adjusts to the authentication mode of the
wireless client.

- WPA: Indicates WPA is used to authenticate another device.

- WPA-PSK: Indicates the WiFi Protected Access Pre-Shared key

23

which is used to authenticate another device. Choose either TKIP
or AES as the encryption mode in the Data encryption field. To use
a WPA Pre-Shared key, enter a password in the WPA Pre-shared
key field that is between 8 and 63 characters.

❑ Data encryption: Indicates the data encryption method. The

encryption mode you select must match the encryption mode
used in the wireless LAN.

Choose from the following options:

- None: Indicates no data encryption takes place.

- WEP: Indicates the WEP encryption mode.

- TKIP: Indicates the TKIP encryption mode. See the WPA Settings
below.

- AES: Indicates the Advanced Encryption Standard (AES)
encryption mode. See the WPA Settings below.

WEP Key Setting...: When implementing WEP security, this section
is used for WEP Key configuration.

❑ Default: Indicates the number of security keys. You can create up

to 4 security keys.

❑ Key Length: Indicates the length of the security key. Select 64bits,

128bits, or 256bits.

❑ Hex or ASCII network key: Indicates the value of the security key.

Choose from the following values:

- Hex: Indicates hexadecimal value. Digits from 0 to 9 and the
letters A through F are accepted. This value must be 10 characters
in length.

- ASCII: Indicates the American Standard Code for Information
Interchange. This code represents English letters as numbers 0
through 127. This value must be 5 characters in length.

WPA Setting: When implementing WPA or WPA-PSK, use this
section to complete your configuration. You must configure the
appropriate settings.

❑ EAP Type: Select an EAP Type from a drop down list of EAP types.

Choose between the following options:

24

— TLS: Indicates the Transport Layer Security protocol.

Once you select TLS, click Configuration. The AT­WCU200G Wireless Configuration utility searches your
computer for certificates. Select a certificate and click
OK.

AT-WCU200G User’s Guide

— PEAP: Indicates Protected Extensible Authentication

Protocol. Once you select PEAP, click Configuration.
Then enter a User Name and Password. Click OK.

❑ Pre-shared key: This field only appears when you configure the

Authentication Mode field as WPA-PSK. Enter a pre-shared key in
ASCII format. This value can be a minimum of 8 characters and a
maximum of 63 characters in length.

5. Click Apply.

Configuring Advanced Settings

To configure the advanced settings on the AT-WCU200G wireless
adapter, perform the following procedure.

1. Click the following icon at the bottom right hand corner of your
screen.

The Allied Telesyn Wireless Client Manager screen is displayed with
the General Tab selected. See Figure 15 on page 13.

2. Click Configuration in the sidebar.

3. Click Advanced in the sidebar.

The Advance Tab is displayed. See Figure 19 on page 26.

25

Figure 19 Advance Tab

4. Configure the following fields as needed:

❑ Power Consumption: Indicates the power consumption of the

AT-WCU200G wireless adapter. Choose from the following
options:

- Disable: This setting consumes the most power. This is the
default setting.

- Enable (Fast): This setting consumes a moderate amount of
power.

- Enable (Max): This setting consumes the least power.

❑ Fragmentation: Indicates the fragmentation setting of the

wireless connection. The default setting is 2346 (when the Power
Consumption field is set to disable). The use of fragmentation
can increase the reliability of frame transmissions. The fragment
size value can typically be set between 256 and 2,048 bytes. A
wireless adapter uses fragmentation to divide 802.11 frames into
smaller pieces (fragments) that are sent separately to the
destination. If very few collisions are occurring, then do not
enable this function. The additional headers applied to each
fragment dramatically increases the overhead on the network,
thereby reducing throughput.

26

❑ RTS / CTS Threshold: Indicates RTS/CTS (Request to Send/Clear

AT-WCU200G User’s Guide

to Send) value. The default setting is 2347 (when the Power
Consumption field is set to disable). Through the proper use of
the RTS/CTS Threshold setting, you can fine tune the operation of
your wireless LAN. If you find a relatively large number of
collisions, you can enable RTS/CTS by setting a specific packet size
threshold of 0 to 2347 bytes. If the packet that the access point is
transmitting is larger than the threshold, it initiates the RTS/CTS
function. If you do not have any hidden nodes, then the use of
RTS/CTS only increases the amount of overhead which reduces
throughput.

27

Displaying and Configuring Host Information

The Host Information Screen displays information about your computer.
It also allows you to assign an IP address to your computer or release an
IP address that is assigned to your computer to the DHCP server.

To display the Host Information Screen and configure an IP address,
perform the following procedure:

1. Click the following icon at the bottom right hand corner of your
screen.

The Allied Telesyn Wireless Client Manager screen is displayed with
the General Tab selected. See

2. From the side bar, select Host Information.

The Host Information screen is displayed. See Figure 20.

Figure 15 on page 13.

28

Figure 20 Host Information Screen

AT-WCU200G User’s Guide

3. If no IP address is displayed, click Renew to assign an IP address to
your computer from the DHCP server.

Note

Click Release to release an assigned an IP address to the DHCP
server.

Displaying Version Information

To display the information about the software, perform the following
procedure:

1. To access the Version Information Screen, click on Version
Information in the side bar of the Wireless Client Manager page.

The Version Information screen is displayed. See Figure 21.

Figure 21 Version Information Screen

29

Uninstalling the AT-WCU200G Wireless Adapter

Under normal circumstances, you do not need to uninstall the
AT-WCU200G wireless adapter. The procedure in this section describes
how to uninstall the AT-WCU200G wireless adapter. After you perform
this procedure, you remove the AT-WCU200G Software driver,
AT-WCU200G Wireless Configuration utility, and the ATI icon from the
desktop of your computer.

To uninstall the AT-WCU200G wireless adapter, perform the following
procedure:

1. Click on the Start menu and select Programs.

Note

If your PC uses an Windows XP Operating System, click Start and
then Control Panel.

2. Select Allied Telesyn.

3. Select AT-WCU200G Wireless Configuration Utility.

4. Select Uninstall Allied Telesyn AT-WCU200G Application.

A confirmation message is displayed.

5. Click OK.

The Maintenance Complete screen is displayed.

6. Click Finish.

7. Unplug the AT-WCU200G wireless adapter.

You have completed the uninstallation procedure.

30

Windows XP Wireless Configuration

AT-WCU200G User’s Guide

Configuring

Wireless

Network Clients

Automatic wireless network configuration supports the IEEE 802.11
standard for wireless networks and minimizes the configuration that is
required to access wireless networks. When you enable automatic
wireless network configuration on your computer, you can roam across
different wireless networks without the need to reconfigure the network
connection settings on your computer for each location. As you move
from one location to a new location, automatic wireless network
configuration searches for available wireless networks and notifies you
when there are new wireless networks available for you to connect to.
After you select the wireless network that you want to connect to,
automatic wireless network configuration updates your wireless
network adapter to match the settings of that wireless network, and
attempts to connect to that wireless network.

With automatic wireless network configuration, you can create a list of
preferred wireless networks, and you can specify the order in which to
attempt connections to these wireless networks.

Upgrading the XP Wireless Configuration Utility

Microsoft provides a free wireless configuration utility upgrade, but it
works only with Windows XP. The WPA client is not available as an
automatic Windows update. You can find it the WPA client in the
following Microsoft Knowledge Base Article:
http://support.microsoft.com/default.aspx?scid=kb;en-us;815485

Download the file into a new directory. Double-click on it to install it.
(The file is self-extracting and self-installing.) Once you have installed the
update, reboot your machine. The software adds additional dialog boxes
to the Network Control Panel to support the new authentication and
encryption options of WPA. You can check that the upgrade has been
installed by opening the Control Panel, double-clicking on Add or
Remove Programs, and checking for Windows XP Hotfix (SP2) Q815485.

For technical support, troubleshooting, and maintaining the Microsoft
XP software, refer to your Microsoft owners manual for Windows XP or at
www.microsoft.com. The technical support information retrieved and
updated may assist you in configuring the XP software. Windows XP
software is a product of Microsoft Corporation and is owned and
licensed under the terms and conditions of the Windows XP software.
Windows XP and Microsoft are trademarks of Microsoft Corporation.

31

Starting Microsoft’s Wireless Configuration Utility

You configure the AT-WCU200G wireless adapter by using Microsoft's
Zero Configuration utility supplied with Windows XP.

To access the Zero Configuration Utility, perform the following
procedure:

1. Select Start, Settings then Network Connections as shown in
Figure 22.

32

Figure 22 Selecting Network Connections

2. Right click on Wireless Network Connection and then select
Properties.

3. Click on the Wireless Networks Tab.

The Wireless Networks screen is displayed. See Figure 23.

AT-WCU200G User’s Guide

Connecting to a

Network

Figure 23 Wireless Connection Properties Screen

4. On the Wireless Networks tab, make sure “Use Windows to
configure my wireless network settings” is selected at the top of the
screen.

If this field is not selected, select it by clicking in the check box.

Note

This check box must be selected to configure the AT-WCU200G
wireless adapter with the Microsoft’s Wireless Configuration utility.

To connect to an existing wireless network, do one of the following:

❑ To connect to an existing access point (infrastructure) network,

under Available networks, select the network name and then
Configure.

In Wireless Network Properties, specify the wireless security
settings, or, if the network key is automatically provided for you

33

(for example, the key is stored on the wireless network adapter
given to you by your administrator), select the The key is
provided for me automatically check box. If you are unsure
about whether a network key is needed or which settings you
need to enter, contact your network administrator.

❑ If a network does not broadcast its network name, it will not

appear under Available networks. To connect to an access point
(infrastructure) network that you know is available but that does
not appear under Available networks, under Preferred
networks, select Add. In Wireless Network Properties, specify
the network name (Service Set Identifier) and, if needed, the
wireless network key settings.

❑ To connect to an existing computer-to-computer (ad hoc)

network, under Available networks, click the network name and
then Configure.

In Wireless Network Properties, specify the wireless network
key (Wired Equivalent Privacy) settings, or, if the network key is
automatically provided for you (for example, the key is stored on
the wireless network adapter given to you by your administrator),
select the The key is provided for me automatically check box.
If you are unsure about whether a network key is needed or which
settings you need to enter, contact your network administrator.

If you want to connect to a computer-to-computer (ad hoc)
network and both computer-to-computer and access point
(infrastructure) networks are within range of your computer,
select Advanced, and then Computer-to-computer (ad hoc)
networks only.

To configure a new wireless network connection, select Add and then
do the following:

❑ In Wireless Network Properties, specify the network name

(Service Set Identifier) and, if needed, the wireless network key
settings.

❑ If the network connection that you are configuring is to a

computer-to-computer (ad hoc) network, select the This is a

computer-to-computer (ad hoc) network; wireless access
points are not used check box.

To change the order in which connection attempts to preferred
networks are made, under Preferred networks, select the wireless
network that you want to move to a new position on the list, and then
select Move up or Move down.

34

AT-WCU200G User’s Guide

To change the wireless network connection settings for a network that is
listed in Preferred networks, click the wireless network for which you
want to change settings, select Properties, and then change the
settings as needed.

To remove a wireless network from the list of preferred networks, under
Preferred networks, click the wireless network that you want to
remove, and then select Remove.

To update the list of available networks that are within range of your
computer, select Refresh.

To automatically connect to available networks that do not appear in the

Preferred networks list, select Advanced then Automatically connect
to non-preferred networks check box.

Configuring

Wireless

Network

Authentication

Settings

Security options for AT-WCU200G wireless adapter include
authentication services which are based on WEP Open and Shared, WPA,
and WPA-PSK.

WEP (Wired Equivalent Privacy)

WEP is a set of security services used to protect 802.11 networks from
unauthorized access, such as eavesdropping (the capture of wireless
network traffic). With automatic wireless network configuration, you can
specify that a network key is used for authentication to the network. You
can also specify that a network key is used to encrypt your data as it is
transmitted over the network. When data encryption is enabled, secret
shared encryption keys are generated and used by the source station
and the destination station to alter frame bits, thus avoiding disclosure
to eavesdroppers.

WEP Open System and Shared Key Authentication

802.11 supports two subtypes of network authentication services: Open

System and Shared Key. Under Open System authentication, any
wireless station can request authentication. The station that needs to
authenticate with another wireless station sends an authentication
management frame that contains the identity of the sending station.
The receiving station then sends back a frame that indicates whether it
recognizes the identity of the sending station.

35

Under the Shared Key authentication, each wireless station is assumed
to have received a secret shared key over a secure channel that is
independent from the 802.11 wireless network communications
channel. To use Shared Key authentication, you must have a network
key.

WPA and WPA-PSK Authentication

Short for Wi-Fi Protected Access, a Wi-Fi standard that was designed to
improve upon the security features of WEP. The technology includes two
improvements over WEP:

❑ Improved data encryption through the temporal key integrity

protocol (TKIP). TKIP scrambles the keys using a hashing algorithm
and, by adding an integrity-checking feature, ensures that the
keys have not been tampered with.

❑ User authentication, which is generally missing in WEP, through

the extensible authentication protocol (EAP). WEP regulates
access to a wireless network based on a computer’s hardware­specific MAC address, which is relatively simple to be sniffed out
and stolen. EAP is built on a more secure public-key encryption
system to ensure that only authorized network users can access
the network.

Data

Encryption

There are two protocols available for encryption: WEP and TKIP.

WEP

When you enable WEP, you can specify that a network key is used for
encryption. A network key can be provided for you automatically (for
example, it might be provided on your wireless network adapter), or you
can specify the key by typing it yourself. If you specify the key, you can
also specify the following:

❑ key length (40 bits or 104 bits)

❑ key format (ASCII characters or hexadecimal digits)

❑ key index (the location where a specific key is stored).

The longer the key length, the more secure the key. Every time the
length of a key is increased by one bit, the number of possible keys
doubles.

36

AT-WCU200G User’s Guide

Under 802.11, a wireless station can be configured with up to four keys
(the key index values are 0, 1, 2, and 3). When an access point or a
wireless station transmits an encrypted message using a key that is
stored in a specific key index, the transmitted message indicates the key
index that was used to encrypt the message body. The receiving access
point or wireless station can then retrieve the key that is stored at the
key index and use it to decode the encrypted message body.

TKIP

The Temporal Key Integrity Protocol, pronounced tee-kip, is part of the
IEEE 802.11i encryption standard for wireless LANs. TKIP is the next
generation of WEP, the Wired Equivalency Protocol, which is used to
secure 802.11 wireless LANs. TKIP provides per-packet key mixing, a
message integrity check and a re-keying mechanism.

Configuring a WEP Wireless Network

Select the Wireless Networks tab in the Wireless Network Connection
Properties and highlight the appropriate wireless network in the
Available Networks window. Select Configure and then select in
Authentication.

When configuring WEP you need to decided between an Open or
Shared Authentication. As described in the WEP Open and Shared
Authentication when choosing an Open Authentication your system is
open to attack by outside forces for this reason when implementing
WEP it is recommended to use a Shared Authentication. However it is
recommended to use WPA or WPA-PSK for stronger security
implementation of your wireless network.

When selecting a WEP shared Authentication a five or thirteen digit key
is required as explained in the WEP section, see WEP

on page 36.

For non-WPA APs implementing an 802.1x security scheme, select Open
or Shared Authentication and WEP Data Encryption. Then select the
Authentication tab and Enable IEEE 802.1x authentication with the
appropriate properties.

Configure WPA Select the Wireless Networks tab in the Wireless Network Connection

Properties and highlight the appropriate wireless network in the
Available Networks window. Select Configure and then select in
Authentication.

37

WPA Network Authentication: When choosing WPA Network
Authentication a certificate is required from a certificate server and
additional parameters must be configured in the Authentication tab.

There are two selections for data encryption, choose one of the
following:

TKIP - Temporal Key Integrity Protocol. TKIP addresses the WEP static key
problem by dynamically updating the key, based on WEP's own RC4
encryption across all devices once for every 10,000 packets transmitted

WEP (802.1x) - Wireless Encryption Protocol. WPA-WEP is an 802.1x
implementation.

The Association Tab in the Wireless network properties screen is
displayed. See Figure 24.

38

Figure 24 Wireless Network Properties

After the Authentication and Encryption parameter have been correctly
completed select the Authentication tab to select the EAP type to be
used with this connection.

AT-WCU200G User’s Guide

If you select Smart Card or other Certificate in EAP type, you can
configure additional properties. If you select Properties in Smart Card
or other Certificate Properties, do the following:

❑ To use the certificate that resides on your smart card for

authentication, select Use my smart card.

❑ To use the certificate that resides in the certificate store on your

computer for authentication, select Use a certificate on this
computer.

❑ To verify that the server certificate presented to your computer is

still valid, select the Validate server certificate check box, specify
whether to connect only if the server resides within a particular
domain, and then specify the trusted root certification authority.

❑ To use a different user name when the user name in the smart

card or certificate is not the same as the user name in the domain
to which you are logging on, select the Use a different user
name for the connection check box.

To specify whether the computer should attempt authentication to the
network if a user is not logged on and/or if the computer or user
information is not available, do the following:

❑ To specify that the computer attempt authentication to the

network if a user is not logged on, select the Authenticate as
computer when computer information is available check box.

❑ To specify that the computer attempt authentication to the

network if user information or computer information is not
available, select the Authenticate as guest when user or
computer information is unavailable check box. This check box
is selected by default

Notes on Authentication:

❑ To configure settings on the Authentication tab, you must be a

member of the local Administrators group.

❑ For wired and wireless network connections, the settings in the

Authentication tab apply to the network to which you are
currently connected. If you are currently connected to a wireless
network, you can verify the name of the network by selecting the

Wireless Networks tab. The name of the network will appear in
Visible networks and Preferred networks, and it will be

preceded by an icon with a circle around it.

See Figure 25 on page 40.

39

Figure 25 Wireless Network Properties, Authentication Tab

Configure WPA-

PSK on

Windows XP

40

Select the Wireless Networks tab in the Wireless Network Connection
Properties and highlight the appropriate wireless network in the
Available Networks window. Select Configure and then select in
Authentication.

AT-WCU200G User’s Guide

WPA-PSK Network Authentication: When choosing WPA-PSK this
option does not require a certificate, but it implements a Pre-shared Key
which is a user defined encryption parameter. This is commonly used
when a certificate is not available for clients. When selecting WPA-PSK
TKIP, the Pre-shared Key must be entered into the Network Key field. See
Figure 26.

Wireless

Figure 26 Network Key Field

For WPA and WPA-PSK there are two options for data encryption, choose
one of the following options:

TKIP - Temporal Key Integrity Protocol. TKIP addresses the WEP static key
problem by dynamically updating the key, based on WEP's own RC4
encryption across all devices once for every 10,000 packets transmitted

41

WEP - Wireless Encryption Protocol. WEP incorporates a static key that
must match on all devices that are within the same wireless network as
identified by the SSID. The key you entered for an AP must match the key
you enter for the client adapter. See Figure 27.

Wireless

42

Figure 27 Data Encryption Field

Technical Specifications

This section lists the technical specifications of the AT-WCU200G
wireless adapter.

General

Bus Interface Universal Serial Bus (USB) 2.0

Radio Technology IEEE 802.11b Direct Sequence Spread

Network Architecture Ad-hoc Mode (peer-to-peer)

AT-WCU200G User’s Guide

Spectrum (DSSS)/CCK

IEEE 802.11g Orthogonal Frequency Division
Multiplexing (OFDM)

Infrastructure Mode

Data Transfer Rate &
Modulation Type

802.11b DSSS:

CCK @ 11, 5.5Mbps
DQPSK@2Mbps
DBPKS@1Mbps

802.11g OFDM:

BPSK@6, 9Mbps
QPSK@12, 18 Mbps
16-QAM@24, 36Mbps
64-QAM@48, 54Mbps

Operating Channels 802.11g and 802.11g:

11: (Ch 1 through 11) US & Canada

14: (Ch 1 through 14) Japan

13: (Ch 1 through 13) Europe

2: (Ch 10 through 11) Spain

4: (Ch 10 through 13) France

Security 64/ 128/ 256-bit WEP, TKIP, AES, 802.11i draft

Operating System Windows 98SE/ME/2000/XP

Physical and Environmental

Driver Support Windows 98, Windows 2000, Windows ME,

Windows XP

Operating Voltage 5V + or - 5% I/O supply voltage

43

Temperature Operating: 0o to 45o C (32o to 113o F)

Storage: o C

Humidity 5% to 90% RH, no condensation

Dimensions W x H x D

80 mm x 30 mm x 13 mm
(2.98 in x 1.1 in x 0.48 in)

Weight 25g (0.88oz)

Certifications FCC Part 15.247 for US, ETS 300 328 for

Europe

44

Regulatory Domains

This appendix lists the IEEE 802.11g channels supported by the world’s
regulatory domains.

Channel
Identifier

802.11b
Frequency

FCC (North
America)

AT-WCU200G User’s Guide

Regulatory Domains

ETSI (Europe) France Israel MKK (Japan)

12412

22417

32422

42427

52432

62437

72442

82447

92452

10 2457

11 2462

12 2467

XX X

XX X

XX XX

XX XX

XX XX

XX XX

XX XX

XX XX

XX XX

XXX X

XXX X

XX X

13 2472

14 2484

XX X

X

45

46