®
A Division of Cisco Systems, Inc.
2.4GHz
802.11g
Wireless-G
Portable USB Adapter
User Guide
WIRELESS
Linksys is a registered trademark or trademark of Cisco Systems, Inc.
and/or its affiliates in the U.S. and certain other countries.
Model No.
WUSB54GP
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Wireless-G Portable USB Adapter
Table of Contents
Chapter 1: Introduction
1
1
2
4
4
4
5
6
Welcome
What’s in this Guide?
Chapter 2: Planning your Wireless Network
Network Topology
Roaming
Network Layout
Chapter 3: Software Installation and Configuration for Windows 2000
Chapter 4: Connecting the Portable USB Adapter
Using the USB Extension Base
Chapter 5: Driver Installation for Windows XP
Windows XP Wireless Zero Configuration
Chapter 6: Using the WLAN Monitor
Overview
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11
12
13
15
15
15
15
17
18
20
24
24
25
28
28
28
Accessing the WLAN Monitor
The Link Information Tab
The Site Survey Tab
The Profiles Tab
Creating a New Profile
Appendix A: Troubleshooting
Common Problems and Solutions
Frequently Asked Questions
Security Precautions
Security Threats Facing Wireless Networks
Appendix B: Wireless Security
Appendix C: Windows Help
Appendix D: Glossary
Appendix E: Specifications
Appendix F: Warranty Information
Appendix G: Regulatory Information
Appendix H: Contact Information
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32
35
37
38
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Wireless-G Portable USB Adapter
Appendix I: Windows Help
Appendix J: Glossary
Appendix K: Specifications
Appendix L: Warranty Information
Appendix M: Regulatory Information
Appendix N: Contact Information
31
32
35
37
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List of Figures
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Wireless-G Portable USB Adapter
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Wireless-G Portable USB Adapter
Chapter 1: Introduction
Welcome
network: a series of computers or devices
connected for the purpose of data sharing, storage,
and/or transmission between users.
Thank you for choosing the Wireless-G Portable USB Adapter. With this Adapter, your wireless networking
experience will be faster and easier than ever.
adapter: a device that adds network functionality to your PC.
How does the Adapter do this? Like all wireless products, the Adapter allows for greater range and mobility
within your wireless network. Connecting to your PC via the USB port means that this Adapter leaves the PC’s
slots open for other purposes. This adapter communicates over the 802.11g wireless standard, one of the newest
wireless standards, to communicate with your network.
802.11g: an IEEE wireless networking standard that specifies a
maximum data transfer rate of 54Mbps, an operating frequency
of 2.4GHz, and backward compatibility with 802.11b devices.
But what does all of this mean?
Networks are useful tools for sharing computer resources. You can access one printer from different computers
and access data located on another computer's hard drive. Networks are even used for playing multiplayer video
games. So, networks are not only useful in homes and offices, they can also be fun.
PCs equipped with wireless cards and adapters can communicate without cumbersome cables. By sharing the
same wireless settings, within their transmission radius, they form a wireless network.
Use the instructions in this Guide to help you connect the Adapter, set it up, and configure it for your network.
These instructions should be all you need to get the most out of the Adapter.
Chapter 1: Introduction
Welcome
1
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Wireless-G Portable USB Adapter
What’s in this Guide?
This user guide covers the steps for setting up and using the Wireless-B USB Network Adapter.
•
•
•
Chapter 1: Introduction
This chapter describes the Adapter’s applications and this User Guide.
Chapter 2: Planning Your Wireless Network
This chapter discusses a few of the basics about wireless networking.
Chapter 3: Software Installation and Configration for Windows 2000
This chapter instructs you on how to install the Adapter’s Setup Wizard and Configure the Adapter for
Windows 2000.
•
•
•
•
Chapter 4: Connecting the Portable USB Adapter
This chapter shows you how to connect the Adapter to your PC’s USB port.
Chapter 5: Driver Installation and Configuration for Windows XP
This chapter explains how to install the Adapter’s driver and use Windows Zero Configuration.
Chapter 6: Using the WLAN Monitor
This chapter show you how to use the Adapter’s WLAN Monitor.
Appendix A: Troubleshooting
This appendix describes some problems and solutions, as well as frequently asked questions, regarding
installation and use of the Adapter.
•
•
Appendix B: Wireless Security
This appendix discusses security issues regarding wireless networking and measures you can take to help
protect your wireless network.
Appendix C: Windows Help
This appendix describes how you can use Windows Help for instructions about networking, such as installing
the TCP/IP protocol.
•
•
Appendix D: Glossary
This appendix gives a brief glossary of terms frequently used in networking.
Appendix E: Specifications
This appendix provides the Adapter’s technical specifications.
Chapter 1: Introduction
What’s in this Guide?
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Wireless-G Portable USB Adapter
•
•
•
Appendix F: Warranty Information
This appendix supplies the Adapter’s warranty information.
Appendix G: Regulatory Information
This appendix supplies the Adapter’s regulatory information.
Appendix H: Contact Information
This appendix provides contact information for a variety of Linksys resources, including Technical Support.
Chapter 1: Introduction
What’s in this Guide?
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Wireless-G Portable USB Adapter
Chapter 2: Planning your Wireless Network
Network Topology
A wireless network is a group of computers, each equipped with one wireless adapter. Computers in a wireless
network must be configured to share the same radio channel. Several PCs equipped with wireless cards or
adapters can communicate with one another to form an ad-hoc network.
ad-hoc: a group of wireless devices
communicating directly with each other (peer-
to-peer) without the use of an access point
Linksys wireless adapters also provide users access to a wired network when using an access point or wireless
router. An integrated wireless and wired network is called an infrastructure network. Each wireless PC in an
infrastructure network can talk to any computer in a wired network infrastructure via the access point or wireless
router.
access point: device that allows wireless-
equipped computers and other devices to
communicate with a wired network.
infrastructure: Configuration in which a
wireless network is bridged to a wired
network via an access point.
An infrastructure configuration extends the accessibility of a wireless PC to a wired network, and can double the
effective wireless transmission range for two wireless adapter PCs. Since an access point is able to forward data
within a network, the effective transmission range in an infrastructure network can be doubled.
roaming: the ability to take a wireless
device from one access point's range to
another without losing the connection.
Roaming
Infrastructure mode also supports roaming capabilities for mobile users. Roaming means that you can move your
wireless PC within your network and the access points will pick up the wireless PC's signal, providing that they
both share the same channel and SSID.
ssid: your wireless network’s name
Before enabling you consider roaming, choose a feasible radio channel and optimum access point position.
Proper access point positioning combined with a clear radio signal will greatly enhance performance.
Chapter 2: Planning your Wireless Network
Network Topology
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Network Layout
802.11b: an IEEE wireless networking standard
that specifies a maximum data transfer rate of
11Mbps and an operating frequency of 2.4GHz.
Linksys wireless access points and wireless routers have been designed for use with 802.11a, 802.11b, and
802.11g products. With 802.11g products communicating with the 802.11b standard and some products
incorporating both “a” and “g”, products using these standards can communicate with each other.
Access points and wireless routers are compatible with 802.11a, 802.11b and 802.11g adapters, such at the PC
Cards for your laptop computers, PCI Card for your desktop PC, and USB Adapters for when you want to enjoy USB
connectivity. Wireless products will also communicate with the wireless PrintServer.
switch: device that is the central point of connection for
computers and other devices in a network, so data can
be shared at full transmission speeds.
When you wish to connect your wired network with your wireless network, network ports on access points and
wireless routers can be connected to any of Linksys's switches or routers.
router: a networking device that connects multiple networks
together, such as a local network and the Internet.
With these, and many other, Linksys products, your networking options are limitless. Go to the Linksys website at
Chapter 2: Planning your Wireless Network
Network Layout
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Chapter 3: Software Installation and Configuration for
Windows 2000
IMPORTANT: You must run the Setup Wizard to
install the software before connecting the Adapter. If
you are running Windows XP, connect the Adapter
as shown in Chapter 4 and proceed to Chapter 5.
The Wireless-G Portable USB Adapter Setup Wizard will guide you through the installation procedure. The Setup
Wizard will install the WLAN Monitor and driver, as well as configure the Adapter.
1. Insert the Setup Wizard CD-ROM into your CD-ROM drive. The Setup Wizard should run automatically, and the
Welcome screen should appear. If it does not, click the Start button and choose Run. In the field that appears,
enter D:\setup.exe (if “D” is the letter of your CD-ROM drive).
Figure 3-1: The Setup Wizard’s Welcome Screen
Chapter 3: Software Installation and Configuration for Windows 2000
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2. Read the License Agreement displayed on the following screen and click the Next button to continue the
installation. If you click the Cancel button, you will end the installation.
Figure 3-2: The License Agreement Screen
3. The Wireless Mode screen will ask for some information about your wireless network. In the SSID field, enter
your network’s SSID (Service Set Identifier). The SSID is your network name and must be identical for all
devices in the network. The default setting is linksys (all lowercase).
Next, choose a wireless mode. Click the Infrastructure Mode radio button if you want your wireless
computers to network with computers on your wired network using an access point. Click the Ad-Hoc Mode
radio button if you want multiple wireless computers to network directly with each other.
Click the Next button to continue, or click the Back button to return to the previous page.
Figure 3-3: The Wireless Mode Screen
Chapter 3: Software Installation and Configuration for Windows 2000
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4. If you chose Infrastructure Mode, go to Step 5 now. If you chose Ad-Hoc Mode, select the correct operating
channel for your network from the Channel drop-down menu. Then, select the Network Mode from the drop-
down menu. Click the Next button, and go to Step 5. Click the Back button to change any settings.
Channel - The channel you choose should match the channel set on the other devices in your wireless
network. If you are unsure about which channel to use, select the default channel (Channel 6).
Network Mode - Keep the default setting, Mixed, if you have Wireless-G and Wireless-B devices in your
network. Select G-Only if you have only Wireless-G devices in your network.
5. The Wireless Security screen allows you to set the security level for your network. Enable or disable Wired
Equivalent Privacy (WEP) encryption for your wireless network. If you enable WEP, enter a Passphrase or WEP
key. Click the Next button to continue or the Back button to return to the previous screen. For more
information about the information on this screen, you can also click the Help button.
Figure 3-4: The Ad-Hoc Mode Settings Screen
WEP - If you do not want to use WEP encryption, choose Disabled. To use WEP encryption (recommended to
increase network security), select 64-bit or 128-bit WEP from the drop-down menu, and enter either a
Passphrase or WEP key.
Passphrase - Instead of manually entering WEP keys, you can enter a Passphrase, so that a WEP key is
automatically generated. It is case-sensitive and should not be longer than 16 alphanumeric characters. This
passphrase must match the passphrase of your wireless network and is compatible with other Linksys
wireless products only. (If you have any non-Linksys wireless products, enter the WEP key(s) manually on
those products.)
WEP Key - This WEP key must match the WEP key of your wireless network. If you are using 64-bit WEP
encryption, then the key must consist of exactly ten hexadecimal characters. If you are using 128-bit WEP
encryption, then the key must consist of exactly 26 hexadecimal characters. Valid hexadecimal characters
are “0” to “9” and “A” to “F”.
TX Key - This allows you to access different WEP keys used by different routers or access points in your
network. Choose the TX Key used in that network. For instance, if the device uses TX Key 3, use TX Key 3. If
you’re not using multiple WEP Keys, leave this set at 1.
Authentication - Select the Authentication method used by your network. Open Authentication does not
employ WEP keys. Shared Authentication employs WEP encryption. Auto (the default setting) chooses the
method of the network to which you're connecting.
Figure 3-5: The Wireless Security Screen
Chapter 3: Software Installation and Configuration for Windows 2000
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6. At this point, a screen stating that a digital signature was not found may appear. This software has been
tested and found to work properly with Windows 2000. Click the Yes button to continue installation.
7. The Setup Wizard will ask you to review your settings before it starts to copy files. Click the Next button to
save these settings, or click the Back button to change any settings.
Figure 3-6: The Check Settings Screen
8. After the files have been successfully copied, the Congratulations screen will appear. Click the Exit button.
Now that the software installation is complete, proceed to Chapter 4: Connecting the Wireless-G Portable USB
Adapter.
Figure 3-7: The Congratulations Screen
software: instructions for the computer
Chapter 3: Software Installation and Configuration for Windows 2000
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Chapter 4: Connecting the Portable USB Adapter
1. To connect the Portable USB Adapter to your PC, simply plug the USB end into your PC’s available USP port.
IMPORTANT: Windows 2000 users must run the Setup
Wizard to install the software before connecting the
Portable USB Adapter.
IMPORTANT: Windows XP users must connect the
Portable USB Adapter before installing the software,
shown in Chapter 5.
Figure 4-1: The Portable USB Adapter on Your Laptop
Figure 4-2: A USB Port
port: the connection point on a computer or networking
device used for plugging in a cable or an adapter.
Chapter 4: Connecting the Portable USB Adapter
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2. When Windows 2000 begins installing the Network Adapter’s driver file, a screen stating that a digital
signature was not found may appear. This software has been tested and found to work properly with
Windows 2000. Click the Yes button to continue installation.
If your PC is running Windows XP, proceed to “Chapter 5: Driver Installation for Windows XP.”
If your PC is running Windows 2000, the installation of the Wireless-G Portable USB Adapter is complete. If you
want to check the link information, search for available wireless networks, or make additional configuration
changes, proceed to “Chapter 6: Using the WLAN Monitor.”
Figure 4-3: The Windows 2000 Digital Signature Screen
Using the USB Extension Base
For better reception on the Portable USB Adapter, you can attach the USB Extension Base to your
PC’s USB port and connect the Portable USB Adapter to the USB Extension Base. Then, you can
place the USB Extension Base more strategically, on a higher platform or away from interference,
for better reception.
Chapter 4: Connecting the Portable USB Adapter
Using the USB Extension Base
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Chapter 5: Driver Installation for Windows XP
After connecting the Adapter to your PC, as shown in Chapter 4, you’ll need to install the driver.
Windows XP will automatically detect the Adapter. Insert the Setup CD-ROM into the CD-ROM drive. Click the
radio button next to Install the software automatically (Recommended). Then, click the Next button.
Figure 5-1: XP Setup Welcome Screen
A Windows logo testing screen may appear, asking if you wish to discontinue installation. This software has been
tested and found to work properly with Windows XP. Click the Continue Anyway button to continue installation.
Figure 5-2: Windows logo testing screen
The next screen shows that the Wizard is complete. Click the Finish button. The drivers are now installed.
Figure 5-3: New Hardware Found screen
Chapter 5: Driver Installation for Windows XP
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NOTE: Windows XP has a built-in configuration tool.
Use Windows XP Wireless Zero Configuration (in the
system tray at the bottom of your screen) to configure
the Adapter.
Windows XP Wireless Zero Configuration
1. After installing the Adapter, the Windows XP Wireless Zero Configuration icon will appear in your computer’s
system tray. Double-click the icon.
Figure 5-4: Windows XP Wireless Zero Configuration icon
NOTE: Steps 2 and 3 are the instructions and
screenshots for Windows XP with Service Pack 1
installed.
If you have not installed Service Pack 1, select the
network you want, and click the Connect button. If the
network has WEP encryption enabled, enter the WEP
key in the Network key field, and then click the
Connect button.
2. The screen that appears will show any available wireless network. Select the network you want.
If this network has WEP encryption enabled, go to step 3.
If this network does not have WEP encryption enabled, you will be asked to select a network. Make sure the
box next to Allow me to connect to the selected wireless network, even though it is not secure is checked.
Then, click the Connect button, and go to step 4.
Figure 5-5: Network Connection - No WEP
Chapter 5: Driver Installation for Windows XP
Windows XP Wireless Zero Configuration
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3. If WEP is enabled, you will be asked to enter the network (WEP) key. Enter the WEP key of your wireless
network in the Network key field, and re-enter it in the Confirm network key field. Then, click the Connect
button, and proceed to step 4.
Figure 5-6: Network Connection - WEP
NOTE: Windows XP Wireless Zero Configuration does
not support the use of a passphrase. Enter the exact
WEP key used by your access point.
4. The Zero Configuration icon, showing a connection, will appear if your connection is active.
Figure 5-7: Optional Settings
For more information about wireless networking on a Windows XP computer, click the Start button, select Help,
and choose Support. Enter the keyword wireless in the field provided, and press the Enter key.
Congratulations! The installation of the Wireless-G USB Network Adapter is complete.
Chapter 5: Driver Installation for Windows XP
Windows XP Wireless Zero Configuration
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Chapter 6: Using the WLAN Monitor
Overview
Use the WLAN Monitor to check the link information, search for available wireless networks, or create profiles
that hold different configuration settings.
Accessing the WLAN Monitor
After installing the Adapter, the Wireless-G USB Network Adapter WLAN Monitor icon will appear in your system
tray. Double-click the icon.
Figure 6-1: The Wireless Icon
The Link Information tab will appear. From this tab, you can find out the strength of the current wireless signal as
well as its quality. You can also click the More Information button to view additional status information about
the current wireless connection. To search for available wireless networks, click the Site Survey tab. To perform
configuration changes, click the Profiles tab.
The Link Information Tab
The Link Information tab displays the signal strength and link quality information about the current connection
and provides a button to click for additional status information.
Ad-Hoc Mode or Infrastructure Mode - The screen indicates whether the Adapter is currently working in ad-
hoc or infrastructure mode.
Signal Strength - The Signal Strength bar indicates the signal strength.
Link Quality - The Link Quality bar indicates the quality of the wireless network connection.
Click the More Information button to view more information about the wireless network connection.
Click the X (Close) button in the upper right corner to exit the WLAN Monitor.
Figure 6-2: The Link Information Tab
Chapter 5: Using the WLAN Monitor
Overview
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Clicking the More Information button displays much more information about the Adapter’s connection, as shown
below:
wep: a method of encrypting data transmitted on a
wireless network for greater security.
Wireless Network Status
Status - The status of the wireless network connection.
SSID - The unique name of the wireless network.
Wireless Mode - The mode of the wireless network currently in use.
Transfer Rate - The data transfer rate of the current connection.
Channel - The channel to which the wireless network devices are set.
WEP - The status of the WEP encryption security feature.
MAC - The MAC address of the wireless network’s access point.
TCP/IP Setting
Figure 6-3: The Link Information Tab - More Information
IP Address - The IP Address of the Adapter.
Subnet Mask - The Subnet Mask of the Adapter.
Default Gateway - The Default Gateway address of the Adapter.
DNS - The DNS address of the Adapter.
DHCP - The status of the DHCP client.
encryption: encoding data to prevent it
from being read by unauthorized people
ip address: the address used to identify a
computer or device on a network
subnet mask: an address code that
determines the size of a network
default gateway: a device that forwards
Internet traffic from your local area network
Signal Strength - The Signal Strength bar indicates the signal strength.
dns: the IP address of your ISP's server, which
translates the names of websites into IP addresses.
Link Quality - The Link Quality bar indicates the quality of the wireless network connection.
dhcp: a protocol that lets one device on a local network,
known as a DHCP server, assign temporary IP addresses
to the other network devices, typically computers.
Click the Back button to return to the initial Link Information tab. Click the X (Close) button in the upper right
corner to exit the WLAN Monitor.
Chapter 5: Using the WLAN Monitor
The Link Information Tab
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The Site Survey Tab
The Site Survey tab displays available networks and allows you to connect to them. The information about these
networks are displayed as below:
SSID - The SSID or unique name of the wireless network.
CH - The channel upon which the network broadcasts.
Signal - The percentage of signal strength, from 0 to 100%.
Figure 6-4: The Site Survey Tab
Site Information
SSID - The SSID or unique name of the wireless network.
Wireless Mode - The mode of the wireless network currently in use.
Channel - The channel to which the wireless network devices are set.
WEP - The status of the WEP encryption security feature.
MAC - The MAC address of the wireless network’s access point.
mac: the unique address that a manufacturer
assigns to each networking device
Refresh - Click the Refresh button to perform a new search for wireless devices.
Connect - To connect to one of the networks on the list, select the wireless network, and click the Connect
button. If the wireless network has WEP encryption enabled, you will need to configure WEP encryption with
that network.
Chapter 5: Using the WLAN Monitor
The Site Survey Tab
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The Profiles Tab
The Profiles screen lets you save different configuration profiles for different network setups. You can also
import or export profiles. The default profile holds the initial configuration saved when you ran the Setup Wizard.
Profile - Name of the connection profile.
SSID - The wireless network’s unique name, as set in the connection profile.
Profile Information
Wireless Mode - The mode of the wireless network currently in use.
Transfer Rate - The data transfer rate of the current connection. (In Auto mode, the Adapter dynamically
shifts to the fastest data transfer rate possible at any given time.)
Figure 6-5: The Profiles Tab
Channel - The channel to which the wireless network devices are set.
WEP - The status of the WEP encryption security feature.
Authentication - The authentication setting for the network.
Connect - To connect to a wireless network using a specific profile, select the profile, and click the Connect
button.
New - Click the New button to create a new profile. See the next section, “Creating a New Profile,” for
detailed instructions.
Edit - Select a profile, and click the Edit button to change an existing profile.
Chapter 5: Using the WLAN Monitor
The Profiles Tab
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Import - Click the Import button to import a profile that has been saved in another location. Select the
appropriate file and click the Open button.
Figure 6-6: Importing a Profile
Export - To save the profile(s) in a different location, click the Export button. Direct Windows to the
appropriate folder and click the OK button.
Figure 6-7: Optional Settings
Delete - Click the Delete button to delete a profile.
Click the X (Close) button in the upper right corner to exit the WLAN Monitor.
Chapter 5: Using the WLAN Monitor
The Profiles Tab
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Creating a New Profile
1. On the Profiles tab, click the New button to create a new profile.
Figure 6-8: The Profiles Tab
2. When the Create connection profile screen appears, enter a name for the new profile. Click OK to save the
profile name or click Cancel to return to the previous screen.
Figure 6-9: Create Connection Profile
Chapter 5: Using the WLAN Monitor
Creating a New Profile
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3. Enter your network’s settings on the Network Settings screen, which appears next.
If your network has a DHCP server (or Router), click the radio button next to Obtain an IP address
automatically (DHCP) and click the Next button to continue.
If your network does not have a DHCP server (or router), click the radio button next to Specify the IP
address. Enter an IP Address, Subnet Mask, Default Gateway, and DNS appropriate for your network.
Enter each address in this format: xxx.xxx.xxx.xxx (the x’s represent the numbers that make up each
address). You must specify the IP Address and Subnet Mask on this screen. If you are unsure about the
Default Gateway and DNS addresses, then leave these fields alone.
IP Address - This IP Address must be unique to your network.
Subnet Mask - The Adapter’s Subnet Mask must be the same as your wired network’s Subnet Mask.
Default Gateway - Enter the IP address of your network’s Gateway here.
DNS - Enter the DNS addresses of your network here.
Click the Next button to continue or the Cancel button to return to the previous screen.
Figure 6-10: Profiles - Network Settings
4. The Wireless Mode screen shows a choice of two wireless modes. Click the Infrastructure Mode radio
button if you want your wireless computers to communicate with computers on your wired network via a
wireless access point. Click the Ad-Hoc Mode radio button if you want multiple wireless computers to
communicate directly with each other. Click the Next button to continue or the Back button to return to the
previous screen.
SSID - The SSID is the unique name shared among all devices in your wireless network. The SSID must be
identical for all devices in the wireless network. It is case-sensitive and must not exceed 32 alphanumeric
characters, which can be any keyboard character.
Infrastructure Mode - This mode allows wireless and wired networks to communicate through an access
point.
Ad-Hoc Mode - This mode allows wireless-equipped computers to communicate directly with each other. No
access point is used.
Figure 6-11: Profiles - Wireless Mode
Chapter 5: Using the WLAN Monitor
Creating a New Profile
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5. The Ad-Hoc Mode Settings screen, for those who chose an Ad-hoc network, will appear next. Select the
correct operating channel for your network from the Channel drop-down menu. Then, select the Network
Mode from the drop-down menu. Click the Next button to continue or click the Back button to change any
settings.
Channel - The channel you choose should match the channel set on the other devices in your wireless
network. If you are unsure about which channel to use, select the default channel (Channel 6).
Network Mode - Select Mixed Mode, and both Wireless-G and Wireless-B computers will be allowed on the
network, but the speed will be reduced. Select G-Only Mode for maximum speed, but no Wireless-B users
will be allowed on the network.
6. The Security Settings screen allows you to set the security level for your network. Enable or disable Wired
Equivalent Privacy (WEP) encryption for your wireless network. If you enable WEP, enter a Passphrase or WEP
key. Click the Next button to continue or the Back button to return to the previous screen. For more
information about the information on this screen, you can also click the Help button.
Figure 6-12: Profiles - Ad-Hoc Settings
WEP - If you do not want to use WEP encryption, choose Disabled. To use WEP encryption (recommended to
increase network security), select 64-bit or 128-bit WEP from the drop-down menu, and enter either a
Passphrase or WEP key.
Passphrase - Instead of manually entering WEP keys, you can enter a Passphrase, so that a WEP key is
automatically generated. It is case-sensitive and should not be longer than 16 alphanumeric characters. This
passphrase must match the passphrase of your wireless network and is compatible with other Linksys
wireless products only. (If you have any non-Linksys wireless products, enter the WEP key(s) manually on
those products.)
WEP Key - This WEP key must match the WEP key of your wireless network. If you are using 64-bit WEP
encryption, then the key must consist of exactly ten hexadecimal characters. If you are using 128-bit WEP
encryption, then the key must consist of exactly 26 hexadecimal characters. Valid hexadecimal characters
are “0” to “9” and “A” to “F”.
TX Key - This allows you to access different WEP keys used by different routers or access points in your
network. Choose the TX Key used in that network. For instance, if the device uses TX Key 3, use TX Key 3. If
you’re not using multiple WEP Keys, leave this set at 1.
Authentication - Select the Authentication method used by your network. Open Authentication does not
employ WEP keys. Shared Authentication employs WEP encryption. Auto (the default setting) chooses the
method of the network to which you're connecting.
Figure 6-13: Profiles - Security Settings
Chapter 5: Using the WLAN Monitor
Creating a New Profile
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Wireless-G Portable USB Adapter
7. The Confirm New Settings screen will appear. To save the new settings, click the Save button. To cancel the
settings and return to the Profiles screen, click the Exit button. To edit the new settings, click the Back
button.
Figure 6-14: Profiles - Confirm New Settings
8. The Congratulations screen shows that the new Profile has successfully been configured. Click Connect to
Network to implement the new settings immediately and return to the Link Information screen. Click Return
to Profiles Screen to keep the current settings active, and return to the Profiles screen so that you can edit
your profile or create another profile.
You have successfully created a connection profile. Click the X (Close) button in the upper right corner to exit the
WLAN Monitor.
Figure 6-15: Profiles - Congratulations
Chapter 5: Using the WLAN Monitor
Creating a New Profile
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Appendix A: Troubleshooting
This appendix provides solutions to problems usually encountered during the installation and operation of the
Adapter. Read the description below to solve your problems. If you can't find an answer here, check the Linksys
Common Problems and Solutions
1.My computer does not recognize the USB Network Adapter.
•
•
Make sure that the USB Network Adapter is properly inserted into the USB port.
Also, make sure that the USB Controller is enabled in the BIOS. Check with your motherboard User Guide for
more information.
2. The USB Network Adapter does not work properly.
•
Reinsert the USB Network Adapter into the notebook or desktop’s USB port.
•
Right-click on My Computer, and select Properties. Select the Adapter, then chose the Device Manager tab,
and click on the Network Adapter. You will find the USB Network Adapter if it is installed successfully. If you
see a yellow exclamation mark, the resources may be conflicting and you must follow the steps below:
•
Uninstall the driver software from your PC.
•
Restart your PC and repeat the hardware and software installation as specified in this User Guide.
3. I cannot communicate with the other computers linked via Ethernet in the Infrastructure
configuration.
•
Make sure that the notebook or desktop is powered on.
•
Make sure that your USB Network Adapter is configured on the same channel, SSID, and WEP as the other
computers in the Infrastructure configuration.
Appendix A: Troubleshooting
Common Problems and Solutions
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Frequently Asked Questions
Can I run an application from a remote computer over the wireless network?
This will depend on whether or not the application is designed to be used over a network. Consult the
application’s user guide to determine if it supports operation over a network.
Can I play computer games with other members of the wireless network?
Yes, as long as the game supports multiple players over a LAN (local area network). Refer to the game’s user
guide for more information.
What is the IEEE 802.11b standard?
It is one of the IEEE standards for wireless networks. The 802.11b standard allows wireless networking hardware
from different manufacturers to communicate, provided that the hardware complies with the 802.11b standard.
The 802.11b standard states a maximum data transfer rate of 11Mbps and an operating frequency of 2.4GHz.
What is the IEEE 802.11g standard?
It is one of the IEEE standards for wireless networks. The 802.11g standard allows wireless networking hardware
from different manufacturers to communicate, provided that the hardware complies with the 802.11g standard.
The 802.11g standard states a maximum data transfer rate of 54Mbps and an operating frequency of 2.4GHz.
What IEEE 802.11b features are supported?
The product supports the following IEEE 802.11b functions:
•
•
•
•
•
•
CSMA/CA plus Acknowledge protocol
Multi-Channel Roaming
Automatic Rate Selection
RTS/CTS feature
Fragmentation
Power Management
What IEEE 802.11g features are supported?
The product supports the following IEEE 802.11g functions:
•
•
•
•
•
•
•
CSMA/CA plus Acknowledge protocol
OFDM protocol
Multi-Channel Roaming
Automatic Rate Selection
RTS/CTS feature
Fragmentation
Power Management
Appendix A: Troubleshooting
Frequently Asked Questions
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What is ad-hoc mode?
When a wireless network is set to ad-hoc mode, the wireless-equipped computers are configured to
communicate directly with each other. The ad-hoc wireless network will not communicate with any wired
network.
What is infrastructure mode?
When a wireless network is set to infrastructure mode, the wireless network is configured to communicate with a
wired network through a wireless access point.
What is roaming?
Roaming is the ability of a portable computer user to communicate continuously while moving freely throughout
an area greater than that covered by a single access point. Before using the roaming function, the workstation
must make sure that it is the same channel number with the access point of dedicated coverage area.
To achieve true seamless connectivity, the wireless LAN must incorporate a number of different functions. Each
node and access point, for example, must always acknowledge receipt of each message. Each node must
maintain contact with the wireless network even when not actually transmitting data. Achieving these functions
simultaneously requires a dynamic RF networking technology that links access points and nodes. In such a
system, the user’s end node undertakes a search for the best possible access to the system. First, it evaluates
such factors as signal strength and quality, as well as the message load currently being carried by each access
point and the distance of each access point to the wired backbone. Based on that information, the node next
selects the right access point and registers its address. Communications between end node and host computer
can then be transmitted up and down the backbone.
As the user moves on, the end node’s RF transmitter regularly checks the system to determine whether it is in
touch with the original access point or whether it should seek a new one. When a node no longer receives
acknowledgment from its original access point, it undertakes a new search. Upon finding a new access point, it
then re-registers, and the communication process continues.
What is ISM band?
The FCC and their counterparts outside of the U.S. have set aside bandwidth for unlicensed use in the ISM
(Industrial, Scientific and Medical) band. Spectrum in the vicinity of 2.4 GHz, in particular, is being made available
worldwide. This presents a truly revolutionary opportunity to place convenient high-speed wireless capabilities in
the hands of users around the globe.
What is Spread Spectrum?
Spread Spectrum technology is a wideband radio frequency technique developed by the military for use in
reliable, secure, mission-critical communications systems. It is designed to trade off bandwidth efficiency for
reliability, integrity, and security. In other words, more bandwidth is consumed than in the case of narrowband
transmission, but the trade-off produces a signal that is, in effect, louder and thus easier to detect, provided that
Appendix A: Troubleshooting
Frequently Asked Questions
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the receiver knows the parameters of the spread-spectrum signal being broadcast. If a receiver is not tuned to
the right frequency, a spread-spectrum signal looks like background noise. There are two main alternatives,
Direct Sequence Spread Spectrum (DSSS) and Frequency Hopping Spread Spectrum (FHSS).
What is DSSS? What is FHSS? And what are their differences?
Frequency-Hopping Spread-Spectrum (FHSS) uses a narrowband carrier that changes frequency in a pattern that
is known to both transmitter and receiver. Properly synchronized, the net effect is to maintain a single logical
channel. To an unintended receiver, FHSS appears to be short-duration impulse noise. Direct-Sequence Spread-
Spectrum (DSSS) generates a redundant bit pattern for each bit to be transmitted. This bit pattern is called a chip
(or chipping code). The longer the chip, the greater the probability that the original data can be recovered. Even if
one or more bits in the chip are damaged during transmission, statistical techniques embedded in the radio can
recover the original data without the need for retransmission. To an unintended receiver, DSSS appears as low
power wideband noise and is rejected (ignored) by most narrowband receivers.
Would the information be intercepted while transmitting on air?
WLAN features two-fold protection in security. On the hardware side, as with Direct Sequence Spread Spectrum
technology, it has the inherent security feature of scrambling. On the software side, WLAN offers the encryption
function (WEP) to enhance security and access control.
What is WEP?
WEP is Wired Equivalent Privacy, a data privacy mechanism based on a 64-bit or 128-bit shared key algorithm, as
described in the IEEE 802.11 standard.
Appendix A: Troubleshooting
Frequently Asked Questions
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Appendix B: Wireless Security
Linksys wants to make wireless networking as safe and easy for you as possible. The current generation of
Linksys products provide several network security features, but they require specific action on your part for
implementation. So, keep the following in mind whenever you are setting up or using your wireless network.
Security Precautions
The following is a complete list of security precautions to take (at least steps 1 through 5 should be followed):
1. Change the default SSID.
2. Disable SSID Broadcast.
3. Change the default password for the Administrator account.
4. Enable MAC Address Filtering.
Note: Some of these security features are
available only through the network router or
access point. Refer to the router or access
point’s documentation for more information.
5. Change the SSID periodically.
6. Use the highest encryption algorithm possible. Use WPA if it is available. Please note that this may reduce
your network performance.
7. Change the WEP encryption keys periodically.
Security Threats Facing Wireless Networks
Wireless networks are easy to find. Hackers know that in order to join a wireless network, wireless networking
products first listen for “beacon messages”. These messages can be easily decrypted and contain much of the
network’s information, such as the network’s SSID (Service Set Identifier). Here are the steps you can take:
Change the administrator’s password regularly. With every wireless networking device you use, keep in mind
that network settings (SSID, WEP keys, etc.) are stored in its firmware. Your network administrator is the only
person who can change network settings. If a hacker gets a hold of the administrator’s password, he, too, can
change those settings. So, make it harder for a hacker to get that information. Change the administrator’s
password regularly.
SSID. There are several things to keep in mind about the SSID:
Appendix B: Wireless Security
Security Precautions
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Wireless-G Portable USB Adapter
1. Disable Broadcast
2. Make it unique
3. Change it often
Most wireless networking devices will give you the option of broadcasting the SSID. While this option may be
more convenient, it allows anyone to log into your wireless network. This includes hackers. So, don’t broadcast
the SSID.
Wireless networking products come with a default SSID set by the factory. (The Linksys default SSID is “linksys”.)
Hackers know these defaults and can check these against your network. Change your SSID to something unique
and not something related to your company or the networking products you use.
Change your SSID regularly so that any hackers who have gained access to your wireless network will have to
start from the beginning in trying to break in.
MAC Addresses. Enable MAC Address filtering. MAC Address filtering will allow you to provide access to only
those wireless nodes with certain MAC Addresses. This makes it harder for a hacker to access your network with
a random MAC Address.
WEP Encryption. Wired Equivalent Privacy (WEP) is often looked upon as a cure-all for wireless security
concerns. This is overstating WEP’s ability. Again, this can only provide enough security to make a hacker’s job
more difficult.
There are several ways that WEP can be maximized:
1. Use the highest level of encryption possible
2. Use “Shared Key” authentication
Important: Always remember that each
device in your wireless network MUST use
the same encryption method and encryption
key or your wireless network will not function
properly.
3. Change your WEP key regularly
WPA. Wi-Fi Protected Access (WPA) is the newest and best available standard in Wi-Fi security. Two modes are
available: WPA-PSK and WPA-RADIUS. WPA-PSK gives you a choice of two encryption methods: TKIP (Temporal
Key Integrity Protocol), which utilizes a stronger encryption method and incorporates Message Integrity Code
(MIC) to provide protection against hackers, and AES (Advanced Encryption Standard), which utilizes a symmetric
128-Bit block data encryption. WPA-RADIUS offers two encryption methods, TKIP and AES, with dynamic
encryption keys, and it uses a RADIUS (Remote Authentication Dial-In User Service) server for authentication.
WPA-PSK. If you do not have a RADIUS server, select the type of algorithm you want to use, TKIP or AES, and
enter a password in the Passphrase field of 8-63 characters.
Appendix B: Wireless Security
Security Threats Facing Wireless Networks
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WPA-RADIUS. WPA used in coordination with a RADIUS server. (This should only be used when a RADIUS
server is connected to the Router or other device.) WPA-RADIUS offers two encryption methods, TKIP and AES,
with dynamic encryption keys.
Implementing encryption may have a negative impact on your network’s performance, but if you are transmitting
sensitive data over your network, encryption should be used.
These security recommendations should help keep your mind at ease while you are enjoying the most flexible
and convenient technology Linksys has to offer.
Appendix B: Wireless Security
Security Threats Facing Wireless Networks
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Appendix C: Windows Help
All wireless products require Microsoft Windows. Windows is the most used operating system in the world and
comes with many features that help make networking easier. These features can be accessed through Windows
Help and are described in this appendix.
TCP/IP
Before a computer can communicate with the Access Point, TCP/IP must be enabled. TCP/IP is a set of
instructions, or protocol, all PCs follow to communicate over a network. This is true for wireless networks as well.
Your PCs will not be able to utilize wireless networking without having TCP/IP enabled. Windows Help provides
complete instructions on enabling TCP/IP.
Shared Resources
If you wish to share printers, folder, or files over your network, Windows Help provides complete instructions on
utilizing shared resources.
Network Neighborhood/My Network Places
Other PCs on your network will appear under Network Neighborhood or My Network Places (depending upon the
version of Windows you're running). Windows Help provides complete instructions on adding PCs to your
network.
Appendix C: Windows Help
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Wireless-G Portable USB Adapter
Appendix D: Glossary
802.11b - An IEEE wireless networking standard that specifies a maximum data transfer rate of 11Mbps and an
operating frequency of 2.4GHz.
802.11g - An IEEE wireless networking standard that specifies a maximum data transfer rate of 54Mbps, an
operating frequency of 2.4GHz, and backward compatibility with 802.11b devices.
Access Point - Device that allows wireless-equipped computers and other devices to communicate with a wired
network. Also used to expand the range of a wireless network.
Adapter - A device that adds network functionality to your PC.
Ad-hoc - A group of wireless devices communicating directly with each other (peer-to-peer) without the use of
an access point.
Backbone - The part of a network that connects most of the systems and networks together, and handles the
most data.
Bandwidth - The transmission capacity of a given device or network.
Bit - A binary digit.
CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance) - A method of data transfer that is used to prevent
data loss in a network.
CTS (Clear To Send) - A signal sent by a device to indicate that it is ready to receive data.
Default Gateway - A device that forwards Internet traffic from your local area network.
DHCP (Dynamic Host Configuration Protocol) - A protocol that lets one device on a local network, known as a
DHCP server, assign temporary IP addresses to the other network devices, typically computers.
DNS (Domain Name Server) - The IP address of your ISP's server, which translates the names of websites into IP
addresses.
DSSS (Direct-Sequence Spread-Spectrum) - A type of radio transmission technology that includes a redundant
bit pattern to lessen the probability of data lost during transmission. Used in 802.11b networking.
Encryption - Encoding data to prevent it from being read by unauthorized people.
Appendix D: Glossary
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Ethernet - An IEEE standard network protocol that specifies how data is placed on and retrieved from a common
transmission medium.
Firmware - 1. In network devices, the programming that runs the device. 2. Programming loaded into read-only
memory (ROM) or programmable read-only memory (PROM) that cannot be altered by end-users.
Fragmentation - Breaking a packet into smaller units when transmitting over a network medium that cannot
support the original size of the packet.
Gateway - A system that interconnects networks.
Hardware - The physical aspect of computers, telecommunications, and other information technology devices.
IEEE (The Institute of Electrical and Electronics Engineers) - An independent institute that develops networking
standards.
Infrastructure Mode - Configuration in which a wireless network is bridged to a wired network via an access
point.
IP (Internet Protocol) - A protocol used to send data over a network.
IP Address - The address used to identify a computer or device on a network.
ISM band - Radio band used in wireless networking transmissions.
ISP (Internet Service Provider) - A company that provides access to the Internet.
LAN (Local Area Network) - The computers and networking products that make up the network in your home or
office.
MAC (Media Access Control) Address - The unique address that a manufacturer assigns to each networking
device.
Mbps (Megabits Per Second) - One million bits per second; a unit of measurement for data transmission.
Network - A series of computers or devices connected for the purpose of data sharing, storage, and/or
transmission between users.
Node - A network junction or connection point, typically a computer or work station.
Appendix D: Glossary
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OFDM (Orthogonal Frequency Division Multiplexing) - A type of modulation technology that separates the data
stream into a number of lower-speed data streams, which are then transmitted in parallel. Used in 802.11a,
802.11g, and powerline networking.
Packet - A unit of data sent over a network.
Passphrase - Used much like a password, a passphrase simplifies the WEP encryption process by automatically
generating the WEP encryption keys for Linksys products.
Port - The connection point on a computer or networking device used for plugging in a cable or an adapter.
Roaming - The ability to take a wireless device from one access point's range to another without losing the
connection.
Router - A networking device that connects multiple networks together, such as a local network and the Internet.
RTS (Request To Send) - A packet sent when a computer has data to transmit. The computer will wait for a CTS
(Clear To Send) message before sending data.
Server - Any computer whose function in a network is to provide user access to files, printing, communications,
and other services.
Software - Instructions for the computer. A series of instructions that performs a particular task is called a
"program".
Spread Spectrum - Wideband radio frequency technique used for more reliable and secure data transmission.
SSID (Service Set IDentifier) - Your wireless network's name.
Subnet Mask - An address code that determines the size of the network.
Switch - Device that is the central point of connection for computers and other devices in a network, so data can
be shared at full transmission speeds.
TCP/IP (Transmission Control Protocol/Internet Protocol) - A network protocol for transmitting data that requires
acknowledgement from the recipient of data sent.
WEP (Wired Equivalent Privacy) - A method of encrypting data transmitted on a wireless network for greater
security.
WLAN (Wireless Local Area Network) - A wireless network.
Appendix D: Glossary
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Wireless-G Portable USB Adapter
Appendix E: Specifications
Model
WUSB54GP
Standards
IEEE 802.11b, IEEE 802.11g, USB 1.1, and USB 2.0
USB extension base with integrated USB Cable
Link (Blue- Blinking when 802.11g RF signal is active
2.400~2.4835GHz (Subject to local regulation)
2.4 GHz => 2dBi
Cabling Type
LEDs
Frecuency Band
Peak Gain of Antenna
Transmit Power
16dBm (Typical)@11Mbps DSSS,
14 dBm (Typical)@54Mbps OFDM
802.11g: 11Mbps @ -83dBm, 54Mbps @-67dBm
11,5.5,2, 1Mbs auto-selection on 802.11b
54,48,36,24,18,12,9,6 Mbps auto-selection on 802.11g
11 Channels (US and Canada), 14 Channels (Japan),
13 Channels (Europe)
Receive Sensitivity
Data Rate
Channels
OS Support
Windows ® 2000 and XP
Security features
Warranty
WEP Encryption 64-bit and 128-bit
3 Year
Appendix E: Specifications
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Wireless-G Portable USB Adapter
Dimensions
1.25" x 4.50" x 0.38"
W x H x D
31.8 mm x 114.3 mm x 9.5 mm)
4.5 oz. (0.13 kg)
Unit Weight
USB Base
2.5 inches Diameter, approx. 6 foot cable
FCC, CE
Certifications
Operating Temp.
Storage Temp.
Operating Humidity
Storage Humidity
0°C ~ 65°C (32°F ~ 150°F)
-40°C ~ 85°C (-40°F~ 185°F)
10% ~ 85% Non-Condensing
5% ~ 90% Non-Condensing
Appendix E: Specifications
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Wireless-G Portable USB Adapter
Appendix F: Warranty Information
LIMITED WARRANTY
Linksys warrants to the original end user purchaser ("You") that, for a period of [ ], (the "Warranty Period") Your Linksys
product will be free of defects in materials and workmanship under normal use. Your exclusive remedy and Linksys's
entire liability under this warranty will be for Linksys at its option to repair or replace the product or refund Your purchase
price less any rebates.
If the product proves defective during the Warranty Period call Linksys Technical Support in order to obtain a Return
Authorization Number. BE SURE TO HAVE YOUR PROOF OF PURCHASE ON HAND WHEN CALLING. When returning a product,
mark the Return Authorization Number clearly on the outside of the package and include a copy of your original proof of
purchase. RETURN REQUESTS CANNOT BE PROCESSED WITHOUT PROOF OF PURCHASE. You are responsible for shipping
defective products to Linksys. Linksys pays for UPS Ground shipping from Linksys back to You only. Customers located
outside of the United States of America and Canada are responsible for all shipping and handling charges.
ALL IMPLIED WARRANTIES AND CONDITIONS OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE LIMITED
TO THE DURATION OF THE WARRANTY PERIOD. ALL OTHER EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF NON-INFRINGEMENT, ARE DISCLAIMED. Some jurisdictions do not
allow limitations on how long an implied warranty lasts, so the above limitation may not apply to You. This warranty gives
You specific legal rights, and You may also have other rights which vary by jurisdiction.
TO THE EXTENT NOT PROHIBITED BY LAW, IN NO EVENT WILL LINKSYS BE LIABLE FOR ANY LOST DATA, REVENUE OR PROFIT,
OR FOR SPECIAL, INDIRECT, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED REGARDLESS OF
THE THEORY OF LIABILITY, ARISING OUT OF OR RELATED TO THE USE OF OR INABILITY TO USE THE PRODUCT, EVEN IF
LINKSYS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. IN NO EVENT WILL LINKSYS' LIABILITY EXCEED THE
AMOUNT PAID BY YOU FOR THE PRODUCT.
The foregoing limitations will apply even if any warranty or remedy provided under this Section fails of its essential
purpose. Some jurisdictions do not allow the exclusion or limitation of incidental or consequential damages, so the above
limitation or exclusion may not apply to You.
Please direct all inquiries to: Linksys, P.O. Box 18558, Irvine, CA 92623 USA.
37
Appendix F: Warranty Information
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Wireless-G Portable USB Adapter
Appendix G: Regulatory Information
FCC STATEMENT
This (Series and Product name) has been tested and complies with the specifications 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
and, if not installed and used according to the instructions, 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 is found by turning the
equipment off and on, the user is encouraged to try to correct the interference by one or more of the following
measures:
• Reorient or relocate the receiving antenna
• Increase the separation between the equipment or device
• Connect the equipment to an outlet other than the receiver’s
• Consult a dealer or an experienced radio/TV technician for assistance
Appendix G: Regulatory Information
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Appendix H: Contact Information
Need to contact Linksys?
Visit us online for information on the latest products and updates
to your existing products at:
ftp.linksys.com
Can't find information about a product you want to buy
on the web? Do you want to know more about networking
with Linksys products? Give our advice line a call at:
Or fax your request in to:
800-546-5797 (LINKSYS)
949-261-8868
If you experience problems with any Linksys product,
you can call us at:
800-326-7114
Don't wish to call? You can e-mail us at:
If any Linksys product proves defective during its warranty period,
you can call the Linksys Return Merchandise Authorization
department for obtaining a Return Authorization Number at:
(Details on Warranty and RMA issues can be found in the Warranty
Information section in this Guide.)
949-261-1288
39
Appendix H: Contact Information
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