ASUS USB-N53 Adapter User Manual PDF

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Summary of Content for ASUS USB-N53 Adapter User Manual PDF

User Manual

E6682 / June 2011

USB-N53 Wireless Dual-band Adapter

(For 802.11 a/g/b/n Wireless Networks)

Copyright 2011 ASUSTeK Computer Inc. All Rights Reserved.

No part of this manual, including the products and software described in it, may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any means, except documentation kept by the purchaser for backup purposes, without the express written permission of ASUSTeK Computer Inc. (ASUS).

Product warranty or service will not be extended if: (1) the product is repaired, modified or altered, unless such repair, modification of alteration is authorized in writing by ASUS; or (2) the serial number of the product is defaced or missing.



Products and corporate names appearing in this manual may or may not be registered trademarks or copyrights of their respective companies, and are used only for identification or explanation and to the owners benefit, without intent to infringe.

Manufacturer contact information

ASUSTeK COMPUTER INC. (Asia Pacific) Address 15 Li-Te Road, Peitou, Taipei, Taiwan 11259 Website Technical Support Telephone +886228943447 Support Fax +886228907698 Online support

ASUS COMPUTER INTERNATIONAL (America) Address 800 Corporate Way, Fremont, CA 94539, USA Telephone +15029550883 Fax +15029338713 Website Online support

ASUS COMPUTER GmbH (Germany and Austria) Address Harkort Str. 21-23, D-40880 Ratingen, Germany Fax +492102959911 Website Online contact

Technical Support Telephone (Component) +491805010923* Telephone (System/Notebook/Eee/LCD) +491805010920* Fax +492102959911 Online support

* EUR 0.14/minute from a German fixed landline; EUR 0.42/minute from a mobile phone.

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Table of contents Notices.......................................................................................................2

1. Introduction ..........................................................................................7

1.1 Package contents ...........................................................................7

1.2 System requirements ......................................................................7

1.3 Hardware ........................................................................................7

2. Installing the USB-N53 driver and utilities ........................................8

3. Configuring USB-N53 using ASUS utility ..........................................9

3.1 Connecting to a wireless network manually ....................................9

3.2 Connecting to a wireless network using WPS ..............................10

3.3 Soft AP mode (Windows XP/Vista/7) ...........................................12

4. Software information .........................................................................14

4.1 ASUS WLAN Control Center ........................................................14

4.2 ASUS Wireless Dual-band Adapter Setting Utility .........................14

5. Configuring USB-N53 using Windows WZC service .....................19

6. Troubleshooting .................................................................................20

7. Glossary ..............................................................................................22

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Federal Communications Commission This device complies with FCC Rules Part 15. Operation is subject to the following two conditions:

This device may not cause harmful interference, and

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

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 or more 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.

WARNING: Any changes or modifications not expressly approved by the party responsible for compliance could void the users authority to operate the equipment.

Prohibition of Co-location This device and its antenna(s) must not be co-located or operating in conjunction with any other antenna or transmitter.

FCC Radiation Exposure Statement This equipment complies with RFCC radiation exposure limits set forth for an uncontrolled environment .

This equipment should be installed and operated with minimum 20cm between the radiator and your body.


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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.

Operation Channels: Ch1~11 for N. America, Ch1~14 Japan, Ch1~ 13 Europe (ETSI)

DGT Warning Statement

Article 12 Without permission, any company, firm or user shall not alter the frequency, increase the power, or change the characteristics and functions of the original design of the certified lower power frequency electric machinery.

Article 14 The application of low power frequency electric machineries shall not affect the navigation safety nor interfere a legal communication, if an interference is found, the service will be suspended until improvement is made and the interference no longer exists.



IC Warning Statement Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication.

This radio transmitter(IC: 3568A-USB-N53) has been approved by Industry Canada to operate with the antenna types listed below with the maximum permissible gain and required antenna impedance for each antenna type indicated. Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited for use with this device.

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Ant. Antenna Type Connector Gain (dBi) Remark A Dipole Antenna Reversed-SMA 5.00 TX / RX B Dipole Antenna Reversed-SMA 3.00 TX / RX C Dipole Antenna Reversed-SMA 3.00 TX / RX D Dipole Antenna Reversed-SMA 2.00 TX / RX E Dipole Antenna Reversed-SMA 2.00 TX / RX

This Class [B] digital apparatus complies with Canadian ICES-003.

Cet appareil numrique de la classe [B] est conforme la norme NMB-003 du Canada.

For product available in the USA/Canada market, only channel 1~11 can be operated. Selection of other channels is not possible.

IC Radiation Exposure Statement: This equipment complies with IC RSS-102 radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body.

Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.

ASUS Recycling/Takeback Services ASUS recycling and takeback programs come from our commitment to the highest standards for protecting our environment. We believe in providing solutions for you to be able to responsibly recycle our products, batteries, other components as well as the packaging materials. Please go to for the detailed recycling information in different regions.

REACH Complying with the REACH (Registration, Evaluation, Authorisation, and Restriction of Chemicals) regulatory framework, we published the chemical substances in our products at ASUS REACH website at

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EC Declaration of Conformity We, the undersigned,

Manufacturer: ASUSTek COMPUTER INC. Address, City: No. 150, LI-TE RD., PEITOU, TAIPEI 112, TAIWAN R.O.C.

Country: TAIWAN

Authorized representative in Europe: ASUS COMPUTER GmbH

Address, City: HARKORT STR. 21-23, 40880 RATINGEN

Country: GERMANY

declare the following apparatus: Product name : Dual-band Wireless USB Adapter

Model name : USB-N53

conform with the essential requirements of the following directives: 2004/108/EC-EMC Directive

EN 55022:2006+A1:2007 EN 61000-3-2:2006+A2:2009 EN 61000-4-2:2009 EN 61000-4-4:2004+A1:2010 EN 61000-4-6:2009 EN 55013:2001+A1:2003+A2:2006

EN 55024:1998+A1:2001+A2:2003 EN 61000-3-3:2008 EN 61000-4-3:2006+A1:2008+A2:2010 EN 61000-4-5:2005 EN 61000-4-11:2004 EN 55020:2007

1999/5/EC-R &TTE Directive EN 300 328 V1.7.1(2006-10) EN 300 440-1 V1.4.1(2008-05) EN 300 440-2 V1.2.1(2008-03) EN 301 511 V9.0.2(2003-03) EN 301 908-1 V3.2.1(2007-05) EN 301 908-2 V3.2.1(2007-05) EN 301 893 V1.5.1(2008-12)

EN 301 489-1 V1.8.1(2008-04) EN 301 489-3 V1.4.1(2002-08) EN 301 489-4 V1.3.1(2002-08) EN 301 489-7 V1.3.1(2005-11) EN 301 489-9 V1.4.1(2007-11) EN 301 489-17 V2.1.1(2009-05) EN 301 489-24 V1.4.1(2007-09)

2006/95/EC-LVD Directive EN 60950-1:2006

EN 60950-1:2006+A11:2009

EN 60065:2002+A1:2006+A11:2008

2009/125/EC-ErP Directive Regulation (EC) No. 1275/2008

EN 62301:2005

Regulation (EC) No. 642/2009

EN 62301:2005

Regulation (EC) No. 278/2009

EN 62301:2005

Ver. 110101

CE marking

Declaration Date: Jul. 15, 2011 Year to begin affixing CE marking:2011

Position : CEO Name : Jerry Shen

Signature : __________

(EC conformity marking)

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Manufacturer: ASUSTeK Computer Inc.

Tel: +886-2-2894-3447

Address: No. 150, LI-DE RD., PEITOU, TAIPEI 112, TAIWAN

Authorised representative in Europe:

ASUS Computer GmbH Address: HARKORT STR. 21-23, D-40880

RATINGEN, DEUTSCHLAND Authorised distributors in Turkey:


CAD. NO.10 AYAZAGA/ISTANBUL CIZGI Elektronik San. Tic. Ltd. Sti.

Tel: +90 212 3567070 Address: CEMAL SURURI CD. HALIM MERIC IS


EEE Ynetmeliine Uygundur.

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1. Introduction

1.2 System requirements Before using the USB-N53 WLAN Card, check if your system meets the following requirements:

Windows Vista/XP/7 USB port

512MB system memory or larger Optical disk drive

1.1Package contents Check your USB-N53 WLAN Card package for the following items.

ASUS USB-N53 WLAN Card x1 Warranty card x1

Quick Start Guide x1 Extension cable x1

Support CD x1

NOTE: If any of the above items is damaged or missing, contact your retailer immediately.

1.3 Hardware

Status indicator

LED Status Description Link On The WLAN card has connected to a wireless network

successfully. Off The WLAN card is disabled.

Tx/Rx Blinking Data is being transmitted or received. On WPS function is enabled. Off No wireless activity.

Enabling the WPS (for Windows OS only) To enable the WPS feature, you may either press the WPS button on the WLAN card or select Use the WPS button in the WLAN cards web interface.

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To install the driver and utilities for your ASUS USB-N53 WLAN Card:

1. Place the bundled Support CD into the optical drive. An Autorun screen appears if the Autorun function is enabled on your computer.

NOTE: If the Autorun function is not enabled on your computer, double-click SETUP.EXE from the root directory to run the Support CD.

2. Installing the USB-N53 driver and utilities

2. Select the setup type that best suit your needs. Click Next to continue.

3. Click Install to start the installation.

IMPORTANT: Install the ASUS USB-N53 WLAN Card into your computer before installing the driver and utilities from the bundled Support CD.

4. Click Finish to complete the installation.

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3.1 Connecting to a wireless network manually To connect USB-N53 to a station (Ad Hoc mode) manually:

2. You may click Survey > Search to search for the wireless networks. Select a network (AP from the available network list) and then click Connect.

1. Right-click the ASUS Wireless Dual- band Adapter Setting Utility icon in the Windows system tray, then select Wireless Setting.

3. Configuring USB-N53 using ASUS utility

Setup is completed. The Status page displays information such as the association state, current data rate, and radio state.

3. If Security is enabled on the AP or station, do the same security settings on your WLAN card as those on the AP or station. Click Save.

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3.2 Connecting to a wireless network using WPS The ASUS USB-N53 WLAN Card supports the WPS function that helps you set up a secure wireless network easily.

To connect USB-N53 to a WPS-enabled AP or station using the WPS push button:

IMPORTANT: Ensure that the AP or station you are trying to connect to supports the WPS function.

2. Select Use the WPS button, then click Next.

3. Press the WPS button on the AP or station to establish a wireless connection. The picture indicates that WPS is scanning for the network.

4. Click Finish. The screen indicates that your WLAN card has connected to the network successfully.

1. Click the WPS tab.

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3. Click Finish. The screen indicates that your WLAN card has connected to the network successfully.

1. Select Use PIN code. 2. Key in 8 digital PIN code from network(AP)'s web user interface, click Next.

To connect USB-N53 to a WPS-enabled AP or station using the PIN code:

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2. Click General table and then click ICS to enable ICS. The General table displays the wireless clients that are currently connecting to the Soft AP.

3. Select a network(station) from the available networks list, then click Apply.

To switch to the Soft AP mode:

1. Click AP to switch to the Soft AP mode.

3.3 Soft AP mode (Windows XP/Vista/7) The ASUS USB-N53 WLAN Card supports the Soft AP mode. In this mode, the WLAN card acts as a virtual AP.

The screen indicates that your WLAN card has switched to the Soft AP mode successfully.

The ASUS Wireless Dual-band Adapter Setting Utility icon in the system tray switches to the ASUS Wireless Access Point Utility icon .

IMPORTANT: Before configuring the Soft AP mode, connect your computer to a wired network to provide network access for your wireless clients.

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To disable the access control function, select Disable from the Access Control Policy dropdown list.

To allow a wireless client to associate with the WLAN card:

1. Select Accept from the Access Control Policy dropdown list

2. Key in its MAC address in the Access Control List field.

3. Click Add.

Only the wireless clients on the Accept list are allowed to associate with the WLAN card.

To prevent a wireless client from associating with the WLAN card:

1. Select Reject from the Access Control Policy dropdown list.

2. Key in its MAC address in the Access Control Policy field.

3. Click Add MAC.

The wireless clients on the Reject list are not allowed to associate with the WLAN card.

In the Soft AP mode, you can limit the wireless clients that associate with the WLAN card through the access control function. Click Configuration > Edit Config > ACL.

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4.1 ASUS WLAN Control Center ASUS WLAN Control Center includes ASUS Wireless Dual-band Adapter Setting Utility (Station mode) and ASUS Wireless Access Point Utility (Soft AP mode) which help you manage your WLAN card easily.

4. Software information

To launch WLAN utility, click Start > All Programs > ASUS Wireless LAN Card. The system tray icon switches as is shown in the picture.

4.2 ASUS Wireless Dual-band Adapter Setting Utility ASUS Wireless Dual-band Adapter Setting Utility provides you with an easy interface to set up wireless connections. This section explains the buttons, fields, and configuration options on the user interface.

ASUS Wireless Dual-band Adapter Setting Utility system tray icon

Right-click the ASUS Wireless Dual-band Adapter Setting Utility system tray icon to display the following options:

Wireless Settings - Launches the ASUS Wireless Dual-band Adapter Setting Utility.

Activate Configuration - Activates a preset profile.

Help - Launches the help file.

About Control Center - Displays the version of your Control Center.

Exit Control Center - Closes the ASUS WLAN Control Center.

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Left-click the ASUS Wireless Dual-band Adapter Setting Utility system tray icon to display the following options:

Wireless Radio On - Turns the wireless radio ON.

Wireless Radio Off - Turns the wireless radio OFF.

Search & Connect - Displays the available wireless networks.

Double-click the icon to launch the ASUS Wireless Dual-band Adapter Setting utility.

Survey - Displays the connection status.

SSID - Displays the name of the wireless network that the WLAN card is connecting to.

MAC Address - Indicates the hardware address of the WLAN card. A MAC address is a unique identifier assigned to networking devices. It consists of six groups of two hexadecimal digits (0 through 9 and A through F) separated by colons, e.g. 00:E0:18:F0:05:C0.

Channel - Displays the channel of the wireless network.

Current Data Rate - Displays the current data transmission rate.

Network Type - Displays the network type such as infrastructure type.

Security - Displays the encryption of the wireless networks.

Search - Lists the wireless networks that the WLAN card is connecting to.

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Config - Basic Network Type

Infrastructure - Select the Infrastructure mode to establish a connection with an AP.

Ad Hoc - Select the Ad Hoc mode to communicate with a station. An Ad Hoc network is formed quickly and easily without pre-planning. For example, you can share meeting notes among networked computers in a meeting room.

Action mode name & Network Name (SSID) - Key in or select from the dropdown list the SSID of an AP or station you are trying to connect to. An SSID must be valid characters and have a maximum of 32 case sensitive characters, such as Wireless LAN.

NOTE: Set the SSID to a null string if you want to allow your WLAN card to connect to any AP it can find. You cannot use a null string in the Ad Hoc mode.

Channel - Select a radio channel for your WLAN card. In the Infrastructure mode, your WLAN card automatically selects the correct channel required to communicate with an AP and this field shows Auto. In the Ad Hoc mode, you are allowed to select a channel for your WLAN Card. WLAN cards in the same network can communicate with each other if they have the same channel setting.

The radio channels you can use depend on the regulations in your country. In the United States (FCC) and Canada (IC), channels 1 to 11 are supported. In Europe (ETSI), channels 1 to 13 are supported. In Japan (MKK), channels 1 to 14 are supported.

Data Rate - Auto: The WLAN card adjusts to the most suitable transmission rate automatically.

Others Encryption - Launches the Encryption page.

Advanced - Launches the Advanced page. In most cases, you do not need to change the default values.

Troubleshooting - Displays the troubleshooting solutions.

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Config - Encryption The Encryption page allows you to set up the encryption settings for your WLAN card. For data confidentiality in a wireless environment, IEEE 802.11 specifies a Wired Equivalent Privacy (WEP) algorithm to offer transmission privacy similar to wired network. WEP uses keys to encrypt data packets sent and decrypt data packets received. The encryption process can scramble frame bits to avoid disclosure to others. Wi-Fi Protected Access (WPA) is an improved security system for 802.11 that encrypts data sent over radio waves. WPA is developed to overcome the weakness of the WEP protocol.

Network Authentication - Set up authentication for your WLAN card. Options are:

Open - Sets the network operating in the Open System mode that disables authentication protection for the network or use the WEP encryption for the network.

Shared - Sets the network operating in the Shared Key mode that uses the WEP encryption for your network.

WPA-PSK/WPA2-PSK - Use the WPA Pre-Shared Key/WPA2 Pre-Shared Key in the Infrastructure mode for authentication.

WPA/WPA2 - Enables the IEEE 802.1x authentication mode. This mode is for environments with Remote Access Dial-in User Service (Radius). In a RADIUS environment, various Extensible Authentication Protocol (EAP) are supported, including PEAP, TLS/Smart Card, TTLS, and LEAP.

Data Encryption - In the Open and Shared authentication modes, options are: Disabled and WEP.

Disabled - Disables the encryption protection for your WLAN card.

WEP - Encrypts the data before it is transmitted over the air. You can communicate with wireless devices that use the same WEP keys.

In the WPA-PSK and WPA2-PSK authentication modes, options are: Temporal Key Integrity Protocol (TKIP) and Advanced Encryption Standard (AES).

TKIP - Dynamically generates unique keys to encrypt data packet.

AES - Offers stronger protection and increases the complexity of wireless encryption. It is a symmetric 128-bit block encryption method that works simultaneously on multiple network layers.

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Wireless Network Key (WEP) - This option becomes configurable when you select WEP in the Data encryption field. 64-bit WEP key uses 5 ASCII characters (10 hexadecimal digits). 128-bit WEP key uses 13 ASCII (26 hexadecimal digits).

Key Format - Allows you to select the key format.

Manual Assignment (WPA and WPA2)- Allows you to assign WEP Keys manually.

Key Length - Allows you to select the key length. For 64bits encryption, each key consists of 10 hexadecimal digits or 5 ASCII characters. For 128bits encryption, each key consists of 26 hexadecimal digits or 13 ASCII characters.

Select one as your Default Key - Allows you to select one of the four WEP Keys as the default key.

Configuration - Advanced

This Advanced page is intended for experienced users to set up additional parameters for the WLAN card. We recommend that you keep the default values.

RTS Threshold (0-2347) - The Request to Send/Clear to Send (RTS/CTS) function is used to minimize collisions among wireless stations. When RTS/CTS is enabled, the router refrains from sending a data frame until another RTS/CTS handshake is completed. Enable RTS/CTS by setting a specific packet size threshold. The default value (2347) is recommended.

Fragmentation Threshold (256-2346) - Fragmentation is used to divide 802.11 frames into smaller pieces (fragments) that are sent separately to the destination. Enable fragmentation by setting a specific packet size threshold. If there is an excessive number of collisions on the WLAN, experiment with different fragmentation values to increase the reliability of frame transmissions. The default value (2346) is recommended for normal use.

Preamble Mode - Select the preamble mode. The default value is Auto.

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1. Left-click the ASUS WLAN Control Center system tray icon, then click Exit. ASUS WLAN Control Center will be switched off.

Click Windows Wireless to use it.

To connect your USB-N53 to a wireless network using Windows WZC service:

5. Configuring USB-N53 using Windows WZC service

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6. Troubleshooting

This chapter provides solutions to problems which you may encounter when installing or using the ASUS USB-N53 WLAN card. Contact a qualified service technician for assistance if the problem still exists after you have performed the troubleshooting solutions.

How do I verify that my WLAN card is installed properly? 1. Right-click My Computer from the Start menu, then select Properties.

2. Select the Hardware tab, then click Device Manager.

3. Double-click Network adapters.

4. Double-click Ralink Turbo Wireless LAN Card. A Ralink Turbo Wireless LAN Card Properties window appears.

5. Check Device status to see if the WLAN Card is working properly.

My WLAN card cannot connect to any Access Points. Check if Network Type is set to the Infrastructure mode.

Check if the SSID of your WLAN card is the same as that of the access point you want to connect to.

Check if the Encryption settings of your WLAN card are the same as those of the access point you want to connect to.

My WLAN card cannot connect to a station or WLAN card.

Check if Network Type is set to the Ad Hoc mode.

Check if the SSID of your WLAN card is the same as that of the station or the WLAN card you want to connect to.

Check if the Channel of your WLAN card is the same as that of the station or the WLAN card you want to connect to.

Check if the Encryption settings of your WLAN card are the same as those of the station or the WLAN card you want to connect to.

The connection quality is bad and the signal strength is weak.

Keep your WLAN card away from microwave ovens and large metal objects to avoid radio interference. Adjust the WLAN card antenna.

Move your WLAN card closer to the access point, station, or WLAN card you want to connect to.

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The TCP/IP protocol does not bind to the WLAN Card.

This occurs when your PC already has six TCP/IP bindings in Windows 98 or ten bindings in Windows Me. These limits are imposed by the Microsoft operating system.

Solution: If your computer already has the maximum number of TCP/IP bindings, remove one of the network adapters from the Network configuration before installing the WLAN Card driver.

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7. Glossary

Access Point (AP) A networking device that seamlessly connects wired and wireless networks. Access Points combined with a distributed system support the creation of multiple radio cells that enable roaming throughout a facility.

Ad Hoc A wireless network composed solely of stations within mutual communication range of each other (no Access Point).

Basic Rate Set This option allows you to specify the data transmission rate.

Basic Service Area (BSS) A set of stations controlled by a single coordination function.

Broadband A type of data transmission in which a single medium (such as cable) carries several channels of data at once.

Channel An instance of medium use for the purpose of passing protocol data units that may be used simultaneously, in the same volume of space, with other instances of medium use (on other channels) by other instances of the same physical layer, with an acceptably low frame error ratio due to mutual interference.

Client A client is the desktop or mobile PC that is connected to your network.

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COFDM (for 802.11a or 802.11g) Signal power alone is not enough to maintain 802.11b-like distances in an 802.11a/g environment. To compensate, a new physical-layer encoding technology was designed that departs from the traditional direct-sequence technology being deployed today. This technology is called COFDM (coded OFDM). COFDM was developed specifically for indoor wireless use and offers performance much superior to that of spread-spectrum solutions. COFDM works by breaking one high-speed data carrier into several lowerspeed subcarriers, which are then transmitted in parallel. Each high-speed carrier is 20MHz wide and is broken up into 52 subchannels, each approximately 300KHz wide. COFDM uses 48 of these subchannels for data, while the remaining four are used for error correction. COFDM delivers higher data rates and a high degree of multipath reflection recovery, thanks to its encoding scheme and error correction.

Each subchannel in the COFDM implementation is about 300KHz wide. At the low end of the speed gradient, BPSK (binary phase shift keying) is used to encode 125Kbps of data per channel, resulting in a 6,000Kbps, or 6Mbps, data rate. Using quadrature phase shift keying, you can double the amount of data encoded to 250Kbps per channel, yielding a 12Mbps data rate. And by using 16-level quadrature amplitude modulation encoding 4bits per hertz, you can achieve a data rate of 24Mbps. The 802.11a/g standard specifies that all 802.11a/ g-compliant products must support these basic data rates. The standard also lets the vendor extend the modulation scheme beyond 24Mbps. Remember, the more bits per cycle (hertz) that are encoded, the more susceptible the signal will be to interference and fading, and ultimately, the shorter the range, unless power output is increased.

Default Key This option allows you to select the default WEP key. This option allows you to use WEP keys without having to remember or write them down. The WEP keys generated using the Pass Phrase is compatible with other WLAN products. The Pass Phrase option is not as secure as manual assignment.

Device Name Also known as DHCP client ID or network name. Sometimes provided by an ISP when using DHCP to assign addresses.

DHCP (Dynamic Host Configuration Protocol) This protocol allows a computer (or many computers on your network) to be automatically assigned a single IP address from a DHCP server.

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DNS Server Address (Domain Name System) DNS allows Internet host computers to have a domain name and one or more IP addresses. A DNS server keeps a database of host computers and their respective domain names and IP addresses, so that when a user enters a domain name into the Internet browser, the user is sent to the proper IP address. The DNS server address used by the computers on your home network is the location of the DNS server your ISP has assigned.

DSL Modem (Digital Subscriber Line) A DSL modem uses your existing phone lines to transmit data at high speeds.

Direct-Sequence Spread Spectrum (for 802.11b) Spread spectrum (broadband) uses a narrowband signal to spread the transmission over a segment of the radio frequency band or spectrum. Direct-sequence is a spread spectrum technique where the transmitted signal is spread over a particular frequency range.

Direct-sequence systems communicate by continuously transmitting a redundant pattern of bits called a chipping sequence. Each bit of transmitted data is mapped into chips and rearranged into a pseudorandom spreading code to form the chipping sequence. The chipping sequence is combined with a transmitted data stream to produce the output signal.

Wireless mobile clients receiving a direct-sequence transmission use the spreading code to map the chips within the chipping sequence back into bits to recreate the original data transmitted by the wireless device. Intercepting and decoding a direct- sequence transmission requires a predefined algorithm to associate the spreading code used by the transmitting wireless device to the receiving wireless mobile client.

This algorithm is established by IEEE 802.11b specifications. The bit redundancy within the chipping sequence enables the receiving wireless mobile client to recreate the original data pattern, even if bits in the chipping sequence are corrupted by interference. The ratio of chips per bit is called the spreading ratio. A high spreading ratio increases the resistance of the signal to interference. A low spreading ratio increases the bandwidth available to the user. The wireless device uses a constant chip rate of 11Mchips/s for all data rates, but uses different modulation schemes to encode more bits per chip at the higher data rates. The wireless device is capable of an 11 Mbps data transmission rate, but the coverage area is less than a 1 or 2 Mbps wireless device since coverage area decreases as bandwidth increases.

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Encryption This provides wireless data transmissions with a level of security. This option allows you to specify a 64-bit or a 128-bit WEP key. A 64-bit encryption contains 10 hexadecimal digits or 5 ASCII characters. A 128-bit encryption contains 26 hexadecimal digits or 13 ASCII characters.

64-bit and 40-bit WEP keys use the same encryption method and can interoperate on wireless networks. This lower level of WEP encryption uses a 40-bit (10 hexadecimal digits assigned by the user) secret key and a 24-bit Initialization Vector assigned by the device. 104-bit and 128-bit WEP keys use the same encryption method.

All wireless clients in a network must have identical WEP keys with the access point to establish connection. Keep a record of the WEP encryption keys.

Extended Service Set (ESS) A set of one or more interconnected basic service set (BSSs) and integrated local area networks (LANs) can be configured as an Extended Service Set.

ESSID (Extended Service Set Identifier) You must have the same ESSID entered into the gateway and each of its wireless clients. The ESSID is a unique identifier for your wireless network.

Ethernet The most widely used LAN access method, which is defined by the IEEE 802.3 standard. Ethernet is normally a shared media LAN meaning all devices on the network segment share total bandwidth. Ethernet networks operate at 10Mbps using CSMA/CD to run over 10-BaseT cables.

Firewall A firewall determines which information passes in and out of a network. NAT can create a natural firewall by hiding a local networks IP addresses from the Internet. A Firewall prevents anyone outside of your network from accessing your computer and possibly damaging or viewing your files.

Gateway A network point that manages all the data traffic of your network, as well as to the Internet and connects one network to another.

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ICS ICS is used to share one computers Internet connection with the rest of the computers on your network. When this computer is connected to the Internet, all the communications to and from the Internet on your network are sent through this computer which is called the host computer. The rest of the computers can send and receive e-mail messages and access the web as if it were connected directly to the Internet.

IEEE The Institute of Electrical and Electronics Engineers. The IEEE sets standards for networking, including Ethernet LANs. IEEE standards ensure interoperability between systems of the same type.

IEEE 802.11 IEEE 802.xx is a set of specifications for LANs from the Institute of Electrical and Electronic Engineers (IEEE). Most wired networks conform to 802.3, the specification for CSMA/CD based Ethernet networks or 802.5, the specification for token ring networks. 802.11 defines the standard for wireless LANs encompassing three incompatible (non-interoperable) technologies: Frequency Hopping Spread Spectrum (FHSS), Direct Sequence Spread Spectrum (DSSS), and Infrared. 802.11 specifies a carrier sense media access control and physical layer specifications for 1 and 2 Mbps wireless LANs.

IEEE 802.11a (54Mbits/sec) Compared with 802.11b: The 802.11b standard was designed to operate in the 2.4GHz ISM (Industrial, Scientific and Medical) band using direct-sequence spreadspectrum technology. The 802.11a standard, on the other hand, was designed to operate in the more recently allocated 5-GHz UNII (Unlicensed National Information Infrastructure) band. And unlike 802.11b, the 802.11a standard departs from the traditional spread-spectrum technology, instead using a frequency division multiplexing scheme thats intended to be friendlier to office environments.

The 802.11a standard, which supports data rates of up to 54 Mbps, is the Fast Ethernet analog to 802.11b, which supports data rates of up to 11 Mbps. Like Ethernet and Fast Ethernet, 802.11b and 802.11a use an identical MAC (Media Access Control). However, while Fast Ethernet uses the same physical-layer encoding scheme as Ethernet (only faster), 802.11a uses an entirely different encoding scheme, called OFDM (orthogonal frequency division multiplexing).

The 802.11b spectrum is plagued by saturation from wireless phones, microwave ovens and other emerging wireless technologies, such as Bluetooth. In contrast, 802.11a spectrum is relatively free of interference.

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Compared with 802.11g: 802.11a is a standard for access points and radio NICs that is ahead of 802.11g in the market by about six months. 802.11a operates in the 5GHz frequency band with twelve separate non-overlapping channels. As a result, you can have up to twelve access points set to different channels in the same area without them interfering with each other. This makes access point channel assignment much easier and significantly increases the throughput the wireless LAN can deliver within a given area. In addition, RF interference is much less likely because of the less-crowded 5GHz band.

IEEE 802.11b (11Mbits/sec) In 1997, the Institute of Electrical and Electronics Engineers (IEEE) adopted the 802.11 standard for wireless devices operating in the 2.4 GHz frequency band. This standard includes provisions for three radio technologies: direct sequence spread spectrum, frequency hopping spread spectrum, and infrared. Devices that comply with the 802.11 standard operate at a data rate of either 1 or 2 Mbps.

In 1999, the IEEE created the 802.11b standard. 802.11b is essentially identical to the 802.11 standard except 802.11b provides for data rates of up to 11Mbps for direct sequence spread spectrum devices. Under 802.11b, direct sequence devices can operate at 11Mbps, 5.5Mbps, 2Mbps, or 1Mbps. This provides interoperability with existing 802.11 direct sequence devices that operate only at 2Mbps.

Direct sequence spread spectrum devices spread a radio signal over a range of frequencies. The IEEE 802.11b specification allocates the 2.4GHz frequency band into 14 overlapping operating Channels. Each Channel corresponds to a different set of frequencies.

IEEE 802.11g 802.11g is a new extension to 802.11b (used in majority of wireless LANs today) that broadens 802.11bs data rates to 54 Mbps within the 2.4 GHz band using OFDM (orthogonal frequency division multiplexing) technology. 802.11g allows backward compatibility with 802.11b devices but only at 11 Mbps or lower, depending on the range and presence of obstructions.

Infrastructure A wireless network centered about an access point. In this environment, the access point not only provides communication with the wired network but also mediates wireless network traffic in the immediate neighborhood.

The 802.11a standard gains some of its performance from the higher frequencies at which it operates. The laws of information theory tie frequency, radiated power and distance together in an inverse relationship. Thus, moving up to the 5GHz spectrum from 2.4GHz will lead to shorter distances, given the same radiated power and encoding scheme.

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IP (Internet Protocol) The TCP/IP standard protocol that defines the IP datagram as the unit of information passed across an Internet and provides the basis for connectionless packet delivery service. IP includes the ICMP control and error message protocol as an integral part. It provides the functional equivalent of ISO OSI Network Services.

IP Address An IP address is a 32-bit number that identifies each sender or receiver of information that is sent across the Internet. An IP address has two parts: the identifier of a particular network on the Internet and an identifier of the particular device (which can be a server or a workstation) within that network.

ISM Bands (Industrial, Scientific, and Medicine Bands) Radio frequency bands that the Federal Communications Commission (FCC) authorized for wireless LANs. The ISM bands are located at 902MHz, 2.400GHz, and 5.7GHz.

ISP (Internet Service Provider) An organization that provides access to the Internet. Small ISPs provide service via modem and ISDN while the larger ones also offer private line hookups (T1, fractional T1, etc.).

LAN (Local Area Network) A communications network that serves users within a defined geographical area. The benefits include the sharing of Internet access, files and equipment like printers and storage devices. Special network cabling (10 Base-T) is often used to connect the PCs together.

MAC Address (Media Access Control) A MAC address is the hardware address of a device connected to a network.

NAT (Network Address Translation) NAT masks a local networks group of IP addresses from the external network, allowing a local network of computers to share a single ISP account. This process allows all of the computers on your home network to use one IP address. This will enable access to the Internet from any computer on your home network without having to purchase more IP addresses from your ISP.

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NIC (Network Interface Card) A network adapter inserted into a computer so that the computer can be connected to a network. It is responsible for converting data from stored in the computer to the form transmitted or received.

Packet A basic message unit for communication across a network. A packet usually includes routing information, data, and sometimes error detection information.

Pass Phrase The Wireless Settings utility uses an algorithm to generate four WEP keys based on the typed combination.

PCMCIA (Personal Computer Memory Card International Association) The Personal Computer Memory Card International Association (PCMCIA), develops standards for PC cards, formerly known as PCMCIA cards. These cards are available in three types, and are about the same length and width as credit cards. However, the different width of the cards ranges in thickness from 3.3 mm (Type I) to 5.0 mm (Type II) to 10.5 mm (Type III). These cards can be used for various functions, including memory storage, land line modems and wireless modems.

PPP (Point-to-Point Protocol) PPP is a protocol for communication between computers using a serial interface, typically a personal computer connected by phone line to a server.

PPPoE (Point-to-Point Protocol over Ethernet) Point-to-Point Protocol is a method of secure data transmission. PPP using Ethernet to connect to an ISP.

Preamble Allows you to set the preamble mode for a network to Long, Short, or Auto. The default preamble mode is Long.

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Radio Frequency (RF) Terms: GHz, MHz, Hz The international unit for measuring frequency is Hertz (Hz), equivalent to the older unit of cycles per second. One megahertz (MHz) is one million Hertz. One gigahertz (GHz) is one billion Hertz. The standard US electrical power frequency is 60Hz, the AM broadcast radio frequency band is 0.55-1.6MHz, the FM broadcast radio frequency band is 88-108MHz, and wireless 802.11 LANs operate at 2.4GHz.

SSID (Service Set Identifier) SSID is a group name shared by every member of a wireless network. Only client PCs with the same SSID are allowed to establish a connection. Enabling the Response to Broadcast SSID requests option allows the device to broadcast its SSID in a wireless network. This allows other wireless devices to scan and establish communication with the device. Unchecking this option hides the SSID to prevent other wireless devices from recognizing and connecting to the device.

Station Any device containing IEEE 802.11 wireless medium access conformity.

Subnet Mask A subnet mask is a set of four numbers configured like an IP address. It is used to create IP address numbers used only within a particular network.

TCP (Transmission Control Protocol) The standard transport level protocol that provides the full duplex, stream service on which many application protocols depend. TCP allows a process or one machine to send a stream of data to a process on another. Software implementing TCP usually resides in the operating system and uses the IP to transmit information across the network.

WAN (Wide Area Network) A system of LANs, connected together. A network that connects computers located in separate areas, (i.e., different buildings, cities, countries). The Internet is a wide area network.

WECA (Wireless Ethernet Compatibility Alliance) An industry group that certifies cross-vender interoperability and compatibility of IEEE 802.11b wireless networking prod WPA (Wi-Fi Protected Access)

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WPA (Wi-Fi Protected Access) Wi-Fi Protected Access (WPA) is an improved security system for 802.11. It is part of the 802.11i draft security standard. WPA encompasses TKIP (Temporal Key Integrity Protocol) along with MIC (Message Integrity Check) and other fixes to WEP such as Weak IV (Initialization Vector) filtering and Random IV generation. TKIP uses 802.1x to deploy and change temporary keys as opposed to static WEP keys once used in the past. It is a significant improvement over WEP. WPA is part of a complete security solution. WPA also requires authentication servers in enterprise security solutions.

Requirements (1) A WPA compatible Access Point or Wireless router, (2) Operating system updates that support WPA. In XP, an updated Windows Zero Config service is needed. Users can download the Windows XP WPA patch here: ABEC-274845DC9E91&displaylang=en

Please note that this patch requires the insta

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