UG_TEW-645UB

UG_TEW-645UB
Federal Communication Commission Interference Statement
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 and, if not
installed and used in accordance with 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 can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
FCC Caution: Any changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to operate this equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions: (1) This device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired
operation.
IMPORTANT NOTE:
Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled
environment. End users must follow the specific operating instructions for satisfying RF
exposure compliance. To maintain compliance with FCC RF exposure compliance
requirements, please follow operation instruction as documented in this manual.
This transmitter must not be co-located or operating in conjunction with any other antenna
or transmitter.
SAR compliance has been established in typical laptop computer(s) with USB slot, and
product could be used in typical laptop computer with USB slot. Other application like
handheld PC or similar device has not been verified and may not compliance with related
RF exposure rule and such use shall be prohibited.
The availability of some specific channels and/or operational frequency bands are country
dependent and are firmware programmed at the factory to match the intended destination.
The firmware setting is not accessible by the end user.
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.
This transmitter must not be co-located or operation in conjunction with any other antenna or
transmitter.
2
Table of Contents
Federal Communications Commission (FCC) Interference statement
CE Mark Warning
2
2
Chapter 1 – Wireless LAN Networking
Transmission Rate
Type of Wireless Networks
Ad-Hoc (IBSS) Network
Infrastructure (BSS) Network
Wireless LAN Security
Data Encryption with WEP
4
4
4
7
9
10
Chapter 2 - Getting Started
About Your 802.11n/b/g WLAN USB2.0 Adapter
Package Content
System Requirement
LED Definition
Wireless Utility and Adapter Hardware Installation
Using the Utility to Configure Your Network
Link Information
Site Survey
Profile
11
11
11
11
12
16
16
17
19
Chapter 3 – Maintenance
Uninstalling the Driver
Uninstall the Client Utility
Upgrading the Wireless Utility
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24
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Glossary
25
3
Chapter 1- Wireless LAN Networking
This section provides background information on wireless LAN networking technology.
THE INFORMATION IN THIS SECTION IS FOR YOUR REFERENCE. CHANGING
NETWORK SETTINGS AND PARTICULARLY SECURITY SETTTINGS SHOULD ONLY
BE DONE BY AN AUTHORIZED ADMINISTRATOR.
Transmission Rate (Transfer Rate)
The adapter provides various transmission (data) rate options for you to select. Options include
Fully Auto, 1 Mbps, 2 Mbps, 5.5 Mbps, 11 Mbps, 6 Mbps, 9 Mbps, 12 Mbps, 18 Mbps, 22 Mbps, 24
Mbps, 36 Mbps, 48 Mbps, 54 Mbps and up to 300Mbps. In most networking scenarios, the
factory default Fully Auto setting proves the most efficient. This setting allows your adapter to
operate at the maximum transmission (data) rate. When the communication quality drops below a
certain level, the adapter automatically switches to a lower transmission (data) rate. Transmission
at lower data speeds is usually more reliable. However, when the communication quality
improves again, the adapter gradually increases the transmission (data) rate again until it reaches
the highest available transmission rate.
Types of Wireless Networks
Wireless LAN networking works in either of the two modes: ad-hoc and infrastructure. In infrastructure mode, wireless devices communicate to a wired LAN via access points. Each access
point and its wireless devices are known as a Basic Service Set (BSS). An Extended Service Set
(ESS) is two or more BSS in the same subnet. In ad hoc mode (also known as peer-to-peer
mode), wireless devices communicate with each other directly and do not use an access point.
This is an Independent BSS (IBSS).
To connect to a wired network within a coverage area using access points, set the adapter operation
mode to Infrastructure (BSS). To set up an independent wireless workgroup without an access point,
use Ad-hoc (IBSS) mode.
AD-HOC (IBSS) NETWORK
Ad-hoc mode does not require an access point or a wired network. Two or more wireless stations
communicate directly to each other. An ad-hoc network may sometimes be referred to as an
Independent Basic Service Set (IBSS).
To set up an ad-hoc network, configure all the stations in ad-hoc mode. Use the same SSID and
channel for each.
4
When a number of wireless stations are connected using a single access point, you have a
Basic Service Set (BSS).
6
In the ESS diagram below, communication is done through the access points, which relay
data packets to other wireless stations or devices connected to the wired network. Wireless
stations can then access resources, such as a printer, on the wired network.
7
In an ESS environment, users are able to move from one access point to another without
losing the connection. In the diagram below, when the user moves from BSS (1) to BSS (2)
the adapter automatically switches to the channel used in BSS (2).
Roaming in an ESS network diagram
8
W IRELESS LAN S ECURITY
Because wireless networks are not as secure as wired networks, it’s vital that security
settings are clearly understood and applied.
The list below shows the possible wireless security levels on your adapter starting with the
most secure. EAP (Extensible Authentication Protocol) is used for authentication and utilizes
dynamic WEP key exchange. EAP requires interaction with a RADIUS (Remote
Authentication Dial-In User Service) server either on the WAN or the LAN to provide
authentication service for wireless stations.
1.
Wi-Fi Protected Access (WPA)
2.
IEEE802.1X EAP with RADIUS Server authentication
3.
WEP Encryption
4.
Unique ESSID
9
D ATA E NCRYPTION WITH W E P
The WEP (Wired Equivalent Privacy) security protocol is an encryption method designed to try
to make wireless networks as secure as wired networks. WEP encryption scrambles all data
packets transmitted between the adapter and the access point or other wireless stations to
keep network communications private. Both the wireless stations and the access points must
use the same WEP key for data encryption and decryption.
DO NOT ATTEMPT TO CONFIGURE OR CHANGE SECURITY SETTTINGS FOR A
NETWORK WITHOUT AUTHORIZATION AND WITHOUT CLEARLY UNDERSTANDING
THE SETTINGS YOU ARE APPLING. WITH POOR SECURITY SETTINGS, SENSITIVE
DATA YOU SEND CAN BE SEEN BY OTHERS.
There are two ways to create WEP keys in your adapter.
•
Automatic WEP key generation based on a password phrase called a passphrase.
The passphrase is case sensitive. You must use the same passphrase for all WLAN
adapters with this feature in the same WLAN.
•
For WLAN adapters without the passphrase feature, you can still take advantage of
this feature by writing down the four automatically generated WEP keys from the
Security Settings screen of the wireless utility and entering them manually as the WEP
keys in the other WLAN adapter(s).
The adapter allows you to configure up to four WEP keys and only one key is used as the
default transmit key at any one time.
The adapter supports up to four 64-BIT & 128-BIT WEP KEYS.
10
Chapter 2 - Getting Started
This chapter introduces the Adapter and prepares you to use the Wireless Utility.
2.1
About Your 802.11 n/b/g WLAN USB2.0 Adapter
The Adapter is an 802.11n, 802.11b, and 802.11g compliant wireless LAN adapter. With the
Adapter, you can enjoy wireless mobility within almost any wireless networking environment.
The following lists the main features of your Adapter.
Your Adapter can communicate with other IEEE 802.11n/b/g compliant wireless
devices.
Wire-free access to networked resources from anywhere beyond the PC with any
USB host interface.
Support Infrastructure & Ad-Hoc mode
Delivers receiving data rate up to 300 Mbps in 11n mode.
For 802.11b/g, date rate dynamically shifts based on signal strength, for maximum
availability and reliability of connection.
Support both 20MHz & 40MHz bandwidth
Support WEP 64/128, WPA, WPA2 encryption
Support QoS – WMM
Multi-path (1x2) design and two PCB antennas built-in design guarantee best
transmitting / receiving quality.
Support Windows-base wireless LAN GUI
Support WPS enable on S/W utility
2.2
Package Content
802.11n/b/g WLAN USB2.0 Adapter
USB Cradle
Installation and Manual CD
Quick Start Guide
Warranty/Registration Card
2.3
System Requirement
Pentium class notebook computers with at least one available USB slot
Microsoft Windows Vista, XP and 2K
CD-ROM drive
2.4
Wireless Utility & Adapter Hardware Installation
NOTE: If you have connected the USB Adapter to your computer, please
remove it first.
Follow the instructions below to install the USB Adapter and Utility.
STEP 1
Insert the Driver and Utility CD into CD drive
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STEP 2
If your CD Autorun is enabled, the installation procedures will be started. (Otherwise open
your CD folder and double-click on the “setup.exe” file)
STEP 3
The InstallShield Wizard prepares for installation.
STEP 4
The InstallShield Wizard prompts you for confirmation. Click Next on the following menu.
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STEP 5
In the destination Folder screen you are asked to confirm the Destination Folder for the
application software. If you would like, you may change the destination folder to another
location. Click Next
STEP 6
The wizard is ready to begin installation. Click Install on it.
13
STEP 7
The Install shield Wizard setup for installation.
STEP 8
Click Finish to complete the client utility installation.
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STEP 9
At this moment please insert your USB Adapter to your Laptop through the cradle. After the
following window pop up, click Next on the Fund New Hardware Wizard
STEP 10
Choose “Install the software automatically” , and click Next.
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STEP 11
Click Finish to complete the installation.
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2.6 Using the Utility to Configure Your Network
The following are explanations on how to configure and use the Utility program. After
completing the installation procedure, a new icon as shown below will automatically appear
in the lower right tray bar.
Hold your mouse pointer over the icon, and press the right mouse button to open the
Wireless Client Utility.
The Wireless Client Utility window as shown below will appear.
The user can now use any of the management functions available in the IEEE 802.11
Wireless Client Utility.
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2.6.1 Link Information
Click the Link Information tab to see general information about the program and its
operations. The Link Information tab does not require any configuration.
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The following table describes the items found on the Link Information screen.
Wireless Network Status
Profile Name
The name of the current selected configuration profile. Set up the
configuration name on the Profile tab.
SSID
Displays the wireless network name.
Link Status
Shows whether the station is associated to the wireless network.
Network Type
The type of network the station is connected to. The options
include:
Wireless Mode
Displays the wireless mode. 802.11g, 11b or 11n
Channel
Shows the currently connected channel.
Transmit Rate
Displays the current transmit rate in Mbps.
BSSID
Displays the BSSID of the wireless network that the wireless
adapter is associated to.
Signal Strength
Shows the strength of the signal.
Security Status
Security
Shows the security type –
WAP-PSK/WAP2-PSK or 802.1X
Authentication
Displays the authentication mode.
Disable,
WEP,
WPA/WPA2,
TCP/IP Status
IP Address
Displays the computer's IP address.
Subnet Mask
Displays subnet mask
Gateway
Displays gateway address
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2.6.2 Site Survey
Click the Site Survey tab to see available infrastructure and ad hoc networks. On this screen,
click Refresh to refresh the list at any time.
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Connecting to a different network
Hold your mouse pointer over the network icon, and click the right mouse button to select the
network.
Click the Connect button to connect the available network. If no configuration profile
exists for that network, the Profile Settings window opens to ask to create a profile for the
network. Follow the procedures to create profile for that network.
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2.6.3 Profile
To add a new configuration profile, click Add on the Profile tab.
22
To modify a configuration profile, select the configuration from the Profile list and click the
Edit button.
Scan Available Networks
Click the Browse button on the Profile Settings screen to scan for available infrastructure
and ad hoc networks. On this list, click Refresh to refresh the list at any time.
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To configure a profile for Ad-Hoc or Infrastructure mode, select the Network Type field on the
Profile Settings.
Click Next to continue the profile setting.
24
To define the security mode, select the security button of the desired security mode. And
then click Next to continue. Please see following table for details of security modes.
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Security Modes table
WPA/WPA2 Enables the use of Wi-Fi Protected Access (WPA).
Choosing WPA/WPA2 opens the WPA/WPA2 Security
Settings screen. The options include:
•
TLS (Transport Layer Security) is a Point-to-Point
Protocol (PPP) extension supporting additional
authentication methods within PPP. Transport Layer
Security (TLS) provides for mutual authentication,
integrity-protected cipher suite negotiation, and key
exchange between two endpoints.
•
PEAP (EAP-GTC) (Protected Extensible
Authentication Protocol) authenticates wireless
LAN clients using only server-side digital certificates
by creating an encrypted SSL/TLS tunnel between
the client and the authentication server. The tunnel
then protects the subsequent user authentication
exchange.
•
PEAP (EAP-MSCHAP V2) (Protected Extensible
Authentication Protocol) To use PEAP
(EAP-MSCHAP V2) security, the server must have
WPA-PEAP certificates, and the server properties
must already be set. Check with the IT manager
•
TTLS (Tunneled Transport Layer Security) An
EAP variant that provides mutual authentication
using a certificate for server authentication, and via a
secure TLS tunnel for the client
WPA-PSK/WPA2-PSK Enables WPA/WPA2 Passphrase security.
Fill in the WPA/WPA2 Passphrase on Security Settings
screen.
802.1x Enables 802.1x security. This option requires IT
administration.
Choosing 802.1x opens the 802.1x Security Settings
screen. The options include:
•
TLS
•
PEAP
•
TTLS
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Advanced Settings
After Security Settings finished, the Advanced Settings screen will be shown as following.
The following table describes the items found on the Advanced Settings screen.
Power Save Mode Shows the power save mode. Power management is disabled in ad
hoc mode. The options include:
Continuous Access Mode
Maximum Power Saving
Fast Power Saving
802.11b Preamble Displays the 802.11b preamble format.
The options include:
Long
Short
Auto
RTS Threshold Value from 0 ~ 2347
FRAG Threshold Value from 256 ~ 2346
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After advance settings are finished, the following screen showed as below.
You can activate the profile now or later.
WPS Setting
The user obtains a device password (PIN Code) from the STA and enters the password into
the Registrar. Both the Enrollee and the Registrar use PIN Config method for the
configuration setup. The detail indicates as follows.
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1. Click "Refresh" button to update available WPS APs.
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2. Select an AP (SSID/BSSID) that STA will join to.
3. Click "PIN" button to start PIN connection.
4. Enter PIN Code of STA into the Registrar when prompted by the Registrar.
*Allow of an exchange between Step 3 and Step 4.
5. The result will look like the below figure.
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6. Then connect successfully. The result will look like the below figure.
Describe "WPS Status Bar" - "PIN - xxx" as follow :
1. A successful PIN Configuration :
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Start PIN connection - SSID ~> Begin associating to WPS AP ~> Associated to WPS AP ~>
Sending EAPOL-Start ~> Sending EAP-Rsp (ID) ~> Receive EAP-Req (Start) ~> Sending
M1 ~> Received M2 ~> (Received M2D ~> Sending EAP-Rsp (ACK)) ~> Sending M3 ~>
Received M4 ~> Sending M5 ~> Received M6 ~> Sending M7 ~> Received M8 ~> Sending
EAP-Rsp(Done) ~> Configured ~> WPS status is disconnected ~> WPS status is connected
successfully-SSID
2. WPS configuration doesn't complete after two-minute connection :
WPS Eap process failed.
3. When Errors occur within two-minute connection, the WPS status bar might report on
"WPS Eap process failed".
Error messages might be :
1. Receive EAP with wrong NONCE.
2. Receive EAP without integrity.
3. Error PIN Code.
4. An inappropriate EAP-FAIL received.
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Chapter 3 – Maintenance
This chapter describes how to uninstall or upgrade the Wireless Utility.
3.1
Uninstall the Driver
Follow the steps below to remove (or uninstall) the USB Adapter driver from your computer.
Step 1. To remove the driver from the OS, go to Start -> Control Panel
Step 2.
Double-click System
Step 3.
Under Hardware tab, click Device Manager.
Step 4.
Double-click Network Adapter
Step 5.
Right-click mouse button on “802.11n USB Wireless Network Adapter”, and
choose Uninstall
Step 6.
Click OK to confirm that you are going to uninstall the driver
3.2
Uninstall the Client Utility
Follow the steps below to remove the Client Utility from your computer.
Step 1. To remove the utility from the OS, go to Start -> Control Panel
Step 2.
Double-click Add-Remove Programs
Step 3.
Select 802.11n Wireless Client Utility, and click the Remove button
3.3
Upgrading the Wireless Utility
To perform the upgrade, follow the steps below.
Step 1. Download the latest version of the utility from the web site and save the file on your
computer.
Step 2.
Follow the steps in Section 2.2 to remove the current Wireless Utility from your
computer.
Step 3.
Restart your computer if prompted.
Step 4.
After restarting, refer to the procedure in the Chapter 2 to install the new utility.
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Glossary
For unfamiliar terms used below, look for entries elsewhere in the glossary.
AD-HOC (IBSS)
Ad-hoc mode does not require an AP or a wired network. A network that transmits
wireless from computer to computer without the use of a base station (access point).
Two or more wireless stations communicate directly to each other. An ad-hoc network
may sometimes be referred to as an Independent Basic Service Set (IBSS).
CHANNEL
A radio frequency used by a wireless device is called a channel.
EAP AUTHENTICATION
EAP (Extensible Authentication Protocol) is an authentication protocol that runs on top of
the IEEE802.1X transport mechanism in order to support multiple types of user
authentication. By using EAP to interact with an EAP-compatible RADIUS server, an
access point helps a wireless station and a RADIUS server perform authentication.
ENCRYPTION
The reversible transformation of data from the original to a difficult-to-interpret format.
Encryption is a mechanism for protecting confidentiality, integrity, and authenticity of data.
It uses an encryption algorithm and one or more encryption keys.
FRAGMENTATION THRESHOLD
This is the maximum data fragment size that can be sent before the packet is fragmented
into smaller packets.
IEEE 802.1X
The IEEE 802.1X standard outlines enhanced security methods for both the authentication
of wireless stations and encryption key management. Authentication can be done using an
external RADIUS server.
INFRASTRUCTURE (BSS)
When a number of wireless stations are connected using a single AP, you have a Basic
Service Set (BSS).
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ROAMING
In an infrastructure network, wireless stations are able to switch from one BSS to another
as they move between the coverage areas. During this period, the wireless stations
maintain uninterrupted connection to the network. This is roaming. As the wireless station
moves from place to place, it is responsible for choosing the most appropriate AP
depending on the signal strength, network utilization among other factors.
SSID
The SSID (Service Set Identity) is a unique name shared among all wireless devices in a
wireless network. Wireless devices must have the same SSID to communicate with each
other.
TEMPORAL KEY INTEGRITY PROTOCOL (TKIP)
Temporal Key Integrity Protocol (TKIP) uses 128-bit keys that are dynamically generated and
distributed by the authentication server.
USER AUTHENTICATION
WPA applies IEEE 802.1X and Extensible Authentication Protocol (EAP) to authenticate
wireless clients using an external RADIUS database. If you do not have an external RADIUS
server, use WPA-PSK/WPA2-PSK (WPA -Pre-Shared Key) that only requires a single (identical) password entered into each access point, wireless gateway and wireless client. As long
as the passwords match, clients will be granted access to a WLAN.
WEP
WEP (Wired Equivalent Privacy) encryption scrambles all data packets transmitted between
the WCB-321A and the AP or other wireless stations to keep network communications private. Both the wireless stations and the access points must use the same WEP key for data
encryption and decryption.
WPA/WPA2
Wi-Fi Protected Access (WPA) and WPA2 (future upgrade) is a subset of the IEEE 802.11
i security specification draft. Key differences between WPA and WEP are user
authentication and improved data encryption. WPA2 is a wireless security standard that
defines stronger encryption, authentication and key management than WPA.
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