Edimax Technology Co 9573180610 Users Manual

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User Manual

Version: 1.1

(Jun, 2006)

COPYRIGHT

Copyright ¤2005/2006 by this company. All rights reserved. No part of this
publication may be reproduced, transmitted, transcribed, stored in a retrieval system,
or translated into any language or computer language, in any form or by any means,
electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without the
prior written permission of this company

This company makes no representations or warranties, either expressed or implied,
with respect to the contents hereof and specifically disclaims any warranties,
merchantability or fitness for any particular purpose. Any software described in this
manual is sold or licensed "as is". Should the programs prove defective following their
purchase, the buyer (and not this company, its distributor, or its dealer) assumes the
entire cost of all necessary servicing, repair, and any incidental or consequential
damages resulting from any defect in the software. Further, this company reserves the
right to revise this publication and to make changes from time to time in the contents
hereof without obligation to notify any person of such revision or changes.

All brand and product names mentioned in this manual are trademarks and/or
registered trademarks of their respective holders.

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 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:

1. Reorient or relocate the receiving antenna.

2. Increase the separation between the equipment and receiver.

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

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

FCC Caution

This device and its antenna must not be co-located or operating in conjunction with
any other antenna or transmitter.

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.

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

Federal Communications Commission (FCC) Radiation Exposure Statement

This equipment complies with FCC radiation exposure set forth for an uncontrolled
environment. In order to avoid the possibility of exceeding the FCC radio frequency
exposure limits, human proximity to the antenna shall not be less than 2.5cm (1 inch)
during normal operation.

Federal Communications Commission (FCC) RF Exposure Requirements

SAR compliance has been established in the laptop computer(s) configurations with
USB port on the side near the center, as tested in the application for Certification, and
can be used in laptop computer(s) with substantially similar physical dimensions,
construction, and electrical and RF characteristics. Use in other devices such a PDAs
or lappads is not authorized. This transmitter is restricted for use with the specific
antenna(s) tested in the application for Certification. The antenna(s) used for this
transmitter must not be co-located or operating in conjunction with any other antenna
or transmitter.

R&TTE Compliance Statement

This equipment complies with all the requirements of DIRECTIVE 1999/5/EC OF THE
EUROPEAN PARLIAMENT AND THE COUNCIL of March 9, 1999 on radio
equipment and telecommunication terminal Equipment and the mutual recognition of
their conformity (R&TTE)
The R&TTE Directive repeals and replaces in the directive 98/13/EEC
(Telecommunications Terminal Equipment and Satellite Earth Station Equipment) As
of April 8, 2000.

Safety

This equipment is designed with the utmost care for the safety of those who install and
use it. However, special attention must be paid to the dangers of electric shock and
static electricity when working with electrical equipment. All guidelines of this and of
the computer manufacture must therefore be allowed at all times to ensure the safe
use of the equipment.

EU Countries Intended for Use

The ETSI version of this device is intended for home and office use in Austria,
Belgium, Denmark, Finland, France, Germany, Greece, Ireland, Italy, Luxembourg,
the Netherlands, Portugal, Spain, Sweden, and the United Kingdom.
The ETSI version of this device is also authorized for use in EFTA member states:
Iceland, Liechtenstein, Norway, and Switzerland.

EU Countries Not intended for use

None.

CONTENTS

1 INTRODUCTION ............................................................................................ 1

1.1 Features......................................................................................................................... 2

1.2 Specifications................................................................................................................ 2

1.3 Package Contents.......................................................................................................... 3

2 INSTALLATION PROCEDURE ..................................................................... 4

3 CONFIGURATION UTILITY ......................................................................... 7

3.1 Site Survey.................................................................................................................... 9

3.2 Profile.......................................................................................................................... 10

3.2.1 Configure the Profile ........................................................................ 11

3.2.1.1 Configuration ............................................................................................. 11

3.2.1.2 Authentication and Security ....................................................................... 13

3.2.1.3 802.1x Setting-Certification ....................................................................... 17

3.2.1.4 802.1x Setting-CA Server .......................................................................... 18

3.3 Link Status .................................................................................................................. 19

3.4 Statistics ...................................................................................................................... 20

3.5 Advance ...................................................................................................................... 20

3.6 QoS ............................................................................................................................. 23

3.7 About........................................................................................................................... 24

3.8 Turbo Mode................................................................................................................. 24

3.9 SoftAP......................................................................................................................... 25

3.9.1 Config............................................................................................................... 25

3.9.1.1 Auth. Vs. Security ..................................................................... 28

3.9.2 Access Control ................................................................................................. 30

3.9.3 Mac Table ......................................................................................................... 31

3.9.4 Event Log ......................................................................................................... 32

3.9.5 Statistics ........................................................................................................... 32

3.9.6 About................................................................................................................ 33

4 TROUBLESHOOTING.................................................................................. 34

1 Introduction

Thank you for purchasing the 802.11g Turbo Wireless LAN USB Adapter. This USB adapter is

designed to comply with IEEE 802.11g Wireless LAN standard and easy to carry with the Mini size. It is

suitable for any Laptop or Desktop computers.

This adapter supports higher data throughput than the IEEE 802.11g standard (up to 54Mbps). It

supports specific ways to increase the data transfer rate at a time; compress the data and decrease the

waiting time to send the next data to the Routers or APs. This feature is called Turbo Mode. When the

adapter is connecting to the Routers or APs with the proprietary feature, the wireless network will be

more effective.

For WLAN security issues, this adapter supports 64/128-bit WEP data encryption that protects your

wireless network from eavesdropping. It also supports WPA (Wi-Fi Protected Access) feature that

combines IEEE 802.1x and TKIP (Temporal Key Integrity Protocol) technologies. Client users are

required to authorize before accessing to APs or AP Routers, and the data transmitted in the network is

encrypted/decrypted by a dynamically changed secret key. Furthermore, this adapter supports WPA2

function, WPA2 provides a stronger encryption mechanism through AES (Advanced Encryption

Standard), which is a requirement for some corporate and government users.

When you use the devices such as Voice over Internet Protocol (VoIP) phones, televisions, VCRs and

MP3 players, how can you speed up the audio, video and voice data to pass through the wireless

network? IEEE 802.11e Quality of Service (QoS) (The Wi-Fi Alliance defined WMM as a profile of the

IEEE 802.11e) extensions for 802.11 networks will help to define the priorities of the data traffics by the

data categories to provide enhanced multimedia support. This adapter supports the advanced

technology for sure.

This adapter is cost-effective, together with the versatile features; it is the best solution for you to build

your wireless network.

1

1.1 Features

x Works with both IEEE 802.11b and IEEE 802.11g products.

x High-speed transfer data rate – up to 54Mbps.

x Supports Turbo Mode to enhance the data transfer speed within the specific wireless

network.

x Supports WMM (IEEE 802.11e QoS standard) function to meet the multi-media data

bandwidth requirement.

x Supports 64/128-bit WEP, WPA (TKIP with IEEE 802.1x), WPA2 (AES with IEEE

802.1x) functions for high level of security.

x Supports CCX 2.0 (Cisco Compatible Extensions) for the radio monitoring and fast

roaming.

x Supports Software AP function, which turns the wireless station into a wireless AP.

x Automatic fallback increases data security and reliability.

x Supports the most popular operating system: Windows 98SE/Me/2000/XP/2003 Server.

x Supports USB 2.0/1.1 interface.

x Portable and mini-size design.

1.2 Specifications

x Standards: IEEE 802.11b/g

x Bus Type: USB 2.0 Type A

x Frequency Band: 2.4000 ~ 2.4835GHz (Industrial Scientific Medical Band)

x Modulation: OFDM with BPSK, QPSK, 16QAM, 64QAM (11g)

x Data Rate: 54/48/36/24/18/12/11/9/6/5.5/2/1Mbps auto fallback

x Securities: 64/128-bit WEP Data Encryption, WPA (TKIP with IEEE 802.1x), WPA2

(AES with IEEE 802.1x)

Note: WPA2 is only enabled in Windows 2000/XP/2003 Server.

x Antenna: Internal Antenna

x Drivers: Windows 98SE/Me/2000/XP/2003 Server

x LEDs: Link/Activity

x Transmit Power: 17dBm ± 2dBm

x Receive Sensitivity: -70dBm@54Mbps, -83.5dBm@11Mbps

BPSK, QPSK, CCK (11b)

x Dimension: 9(H) x 27(W) x 87(D) mm

x Temperature: 32~122F (0 ~ 50C)

x Humidity: 10-95% (NonCondensing)

x Certification: FCC, CE

2

1.3 Package Contents

Before you begin the installation, please check the items of your package. The package should include

the following items:

x One USB Adapter

x One USB 2.0 Extension Cable (100 cm)

x One CD (Driver/Utility/User’s Manual)

x One Quick Guide

If any of the above items is missing, contact your supplier as soon as possible.

3

2 Installation Procedure

Before you proceed with the installation, please notice following descriptions.

Note1: Please do not install the adapter into your computer before installing the software

program from the CD.

Note2: The following installation was operated under Windows XP. (Procedures are similar for

Windows 98SE/Me/2000/2003 Server.)

Note3: If you have installed the Turbo Wireless LAN USB Adapter driver & utility before, please

uninstall the old version first.

A. Insert the Installation CD to your CD-ROM Drive. Execute the “setup” program.

B. Click “Yes” to process the installation if you accept the license agreement.

4

C. In Windows XP, there is a “Windows Zero Configuration Tool” for you to setup the wireless adapter.

You can choose to configure the adapter through the Windows Zero Configuration Tool or the

Ralink Configuration Tool for the adapter. It is recommended to choose the Ralink Configuration

Tool for the adapter. Click “Next” to continue.

D. If you need the adapter to operate with better performance, please choose the “Optimize for

performance” to enable the Tx Burst mode. Or you can choose “Optimize for Wi-Fi mode” to let the

adapter run in standard wireless network.

5

E. The system starts to install the software of the adapter. Please follow the instructions of the

program to plug in the adapter into the USB port of your computer. And the system will

automatically detect the adapter

F. Please click “Finish” to complete the installation.

6

3 Configuration Utility

The Ralink Configuration Utility is a powerful application that helps you configure the USB adapter and

monitor the link status and the statistics during the communication process.

When the adapter is installed, the configuration utility will be displayed automatically. This adapter will

auto connect to wireless device which has better signal strength and no wireless security setting.

The Ralink Configuration Utility appears as an icon on the system tray of Windows while the adapter is

running. You can open the utility by double-click on the icon.

In Windows XP, there is a “Windows Zero Configuration Tool” for you to setup wireless clients. If you

want to switch to use Ralink configuration utility, please follow one of the ways as below.

First Way

Right click the icon in the system tray and select “Use RaConfig as Configuration utility”.

7

Second Way

A. Right-click the icon and select “View Available Wireless Networks”.

B. Click “Advanced”.

C. Uncheck “Use Windows to configure my wireless network settings” to enable the utility for the

adapter.

8

Note: If “Wireless Zero Configuration” is enabled, you can only configure the advance setting or check

the link status and statistics from the configuration utility of the adapter.

3.1 Site Survey

When you open the Ralink Configuration Utility, the system will scan all the channels to find all the

access points/stations within the accessible range of your adapter and automatically connect to the

wireless device with the highest signal strength. From the “Site Survey”, all the networks nearby will be

listed. You can change the connection to another networks or add one of the networks to your own

profile list.

Parameter Description

Available Networks This list shows all available wireless networks within range of your

adapter. It also displays the information of the networks including

the SSID, BSSID, Signal Strength, Channel, Encryption,

Authentication and Network Type. If you want to connect to any

networks on the list, double-click the item on the list, and the

adapter will automatically connect to the selected network.

Rescan Button Click “Rescan” button to collect the new information of all the

wireless networks nearby.

Connect Button

Add to Profile Button

Click “Connect” to connect to the selected network.

Add the selected network to Profiles list.

9

3.2 Profile

The “Profiles List” is for you to manage the networks you connect to frequently. You are able to

Add/Delete/Edit/Activate a profile.

Parameter Description

Profiles List The profiles list display all the profiles and the relative settings of

the profiles including Profile Name, SSID, Channel, etc.

This sign indicates the activated profile is been connecting.

This sign indicates the activated profile is not been

connecting.

Add/Delete/Edit Button

Activate Button Click “Activate” to connect to the selected profile. When a profile is

Click these buttons to add/delete/edit the selected profiles.

activated, the adapter will be initially connected to the profile.

10

3.2.1 Configure the Profile

3.2.1.1 Configuration

Parameter Description

Profile Name Define a recognizable profile name for you to identify the different

networks.

SSID The SSID (up to 32 printable ASCII characters) is the unique

name identified in a WLAN. The ID prevents the unintentional

merging of two co-located WLANs.

You may specify a SSID for the adapter and then only the device

with the same SSID can interconnect to the adapter. If you want to

add the network nearby to the profile list, pull down the menu, all

the networks will be listed for you to add one of them to the profile

list.

PSM (Power Saving Mode) The power saving function is only available when the network type

is in Infrastructure.

CAM (Constantly Awake Mode) – The adapter will always set in

active mode.

PSM (Power Saving Mode) – Enable the adapter in the power

saving mode when it is idle.

11

Parameter Description

Network Type Infrastructure – This operation mode requires the presence of an

802.11 Access Point. All communication is done via the Access

Point or Router.

Ad-Hoc – Select this mode if you want to connect to another

wireless stations in the Wireless LAN network without through an

Access Point or Router.

TX Power If you want to lower the transmit power of the adapter for saving the

power of the system, you can select the lower percentages from the

list. The lower power will cause the lower signal strength and the

coverage range.

Preamble The preamble defines the length of the CRC block for

communication among wireless devices. This option is only active

in the Ad Hoc network.

There are two modes including Auto and Long Preamble. If

“Auto“ mode is selected, the adapter will auto switch the preamble

mode depending on the wireless devices the adapter is connecting

to.

RTS Threshold Minimum packet size required for an RTS (Request To Send). For

packets smaller than this threshold, an RTS is not sent and the

packet is transmitted directly to the wireless network. Select a

setting within a range of 0 to 2347 bytes. Minor change is

recommended.

Fragment Threshold The value defines the maximum size of packets; any packet size

larger than the value will be fragmented. If you have decreased this

value and experience high packet error rates, you can increase it

again, but it will likely decrease overall network performance. Select

a setting within a range of 256 to 2346 bytes. Minor change is

recommended.

Channel This setting is only available for Ad Hoc mode. Select the number of

the radio channel used for the networking. The channel setting

should be the same with the network you are connecting to.

12

3.2.1.2 Authentication and Security

Parameter Description

Authentication Type This setting has to be consistent with the wireless networks that

the adapter intends to connect.

Open – No authentication is needed among the wireless network.

Shared – Only wireless devices using a shared key (WEP Key

identified) are allowed to connecting each other.

LEAP – LEAP is a pre-EAP, Cisco-proprietary protocol, with many

of the features of EAP protocols. Cisco controls the ability of other

vendors to implement this protocol, so it should be selected for

use only when limited vendor choice for client, access-point, and

server products is not a concern. When you have set up LEAP

authentication, you have to enter the user name and password of

your computer.

WPA – WPA provides a scheme of mutual authentication using

either IEEE 802.1x/Extensible Authentication Protocol (EAP)

authentication or pre-shared key (PSK) technology. It provides a

high level of assurance to enterprises, small businesses and

home users that data will remain protected and that only

authorized users may access their networks. For enterprises that

have already deployed IEEE 802.1x authentication, WPA offers

the advantage of leveraging existing authentication databases

and infrastructure.

13

Parameter Description

WPA-PSK – It is a special mode designed for home and small

business users who do not have access to network authentication

servers. In this mode, known as Pre-Shared Key, the user

manually enters the starting password in their access point or

gateway, as well as in each wireless station in the network.

WPA-PSK takes over automatically from that point, keeping

unauthorized users that don't have the matching password from

joining the network, while encrypting the data traveling between

authorized devices.

WPA2 – Like WPA, WPA2 supports IEEE 802.1x/EAP

authentication or PSK technology. It also includes a new

advanced encryption mechanism using the Advanced Encryption

Standard (AES). AES is required to the corporate user or

government users. The difference between WPA and WPA2 is that

WPA2 provides data encryption via the AES. In contrast, WPA

uses Temporal Key Integrity Protocol (TKIP).

WPA2-PSK – WPA2-PSK is also for home and small business.

The difference between WPA-PSK and WPA2-PSK is that

WPA2-PSK provides data encryption via the AES. In contrast,

WPA-PSK uses Temporal Key Integrity Protocol (TKIP).

WPA-NONE – WPA-NONE is defined for Ad hoc mode and

behaves like WPA-PSK (WPA-PSK is only defined for

infrastructure mode). The user manually enters the Pre-Shared

Key in each wireless station in the network and WPA-NONE

controls unauthorized users that don't have the matching

Pre-Shared Key from joining the network and also encrypts the

data traveling between authorized devices.

802.1x Setting When you have set the Authentication Type to Open, Shared,

WPA or WPA2, you can also enable IEEE 802.1x setting to use

the authentication server or certification server to authenticate

client users.

Encryption Mode None – Disable the encryption mode.

WEP – Enable the WEP Data Encryption. When the item is

selected, you have to continue setting the WEP Encryption keys.

TKIP – TKIP (Temporal Key Integrity Protocol) changes the

temporal key every 10,000 packets (a packet is a kind of message

transmitted over a network.) This ensures much greater security

than the standard WEP security.

14

Parameter Description

AES – AES has been developed to ensure the highest degree of

security and authenticity for digital information and it is the most

advanced solution defined by IEEE 802.11i for the security in the

wireless network.

Note: All devices in the network should use the same encryption

method to ensure the communication.

WPA Pre-Shared Key The WPA-PSK key can be from 8 to 64 characters and can be

letters or numbers. This same key must be used on all of the

wireless stations in the network.

WEP Key

(Key1 ~ Key4)

The WEP keys are used to encrypt data transmitted in the

wireless network. There are two types of key length: 64-bit and

128-bit. Select the default encryption key from Key 1 to Key 4 by

selected the radio button.

Fill the text box by following the rules below.

64-bit – Input 10-digit Hex values (in the “A-F”, “a-f” and “0-9”

range) or 5-digit ASCII characters (including “a-z” and “0-9”) as

the encryption keys. For example: “0123456aef“ or “test1”.

128-bit – Input 26-digit Hex values (in the “A-F”, “a-f” and “0-9”

range) or 13-digit ASCII characters (including “a-z” and “0-9”) as

the encryption keys. For example:

“01234567890123456789abcdef“ or “administrator”.

15

The IEEE 802.1X specification describes a protocol that can be used for authenticating both clients and

servers on a network. The authentication algorithms and methods are those provided by the Extensible

Authentication Protocol (EAP), a method of authentication that has been in use for a number of years

on networks that provide Point-to-Point Protocol (PPP) support as many internet service providers and

enterprises do.

When an AP acting as an authenticator detects a wireless station on the LAN, it sends an EAP-Request

for the user's identity to the device. (EAP, or the Extensible Authentication Protocol, is an authentication

protocol that runs before network layer protocols transmit data over the link.) In turn, the device

responds with its identity, and the AP relays this identity to an authentication server, which is typically

an external RADIUS server.

An example for MD5 Authentication

IEEE 802.1x

Access Client

(1) Client requests to login the
network.

(2) Login with username,

password.

1

2

RADIUS

Client

Access Point

RADIUS

Server

3

4

Windows 2000 IAS
(Internet Authentication

Service)

(3) Send username, password to
RADIUS server.

(4) Approve or deny user

login to the LAN.

16

3.2.1.3 802.1x Setting-Certification

A

Parameter Description

Authentication Type The EAP authentication protocols this adapter has supported are

included as follows. This setting has to be consistent with the

wireless APs or Routers that the adapter intends to connect.

PEAP &TTLS – PEAP and TTLS are similar and easier than TLS

in that they specify a stand-alone authentication protocol be used

within an encrypted tunnel. TTLS supports any protocol within its

tunnel, including CHAP, MS-CHAP, MS-CHAPv2, PAP and

EAP-MD5. PEAP specifies that an EAP-compliant authentication

protocol must be used; this adapter supports EAP-MSCHAP v2,

EAP-TLS/Smart Card and Generic Token Card. The client

certificate is optional required for the authentication.

TLS/Smart Card –TLS is the most secure of the EAP protocols

but not easy to use. It requires that digital certificates be

exchanged in the authentication phase. The server presents a

certificate to the client. After validating the server’s certificate, the

client presents a client certificate to the server for validation.

Session Resumption There are “Disabled”, “Reauthentication”, “Roaming”, “SameSsid”

and “Always” selections for you to choose whether to recovery the

session in different status.

Password Enter the password as the identity for the server.

Use Client Certificate

Tunneled Authentication

Protocol When the authentication type is PEAP or TTLS, select a protocol

Identity This is the protected user EAP Identity used for authentication.

client certificate is required for TLS, and is optional for TTLS and

PEAP. This forces a client certificate to be selected from the

appropriate Windows Certificate Store and made available to the

RADIUS server for certification.

to be used to build the encrypted tunnel.

The identity specified may contain up to 63 ASCII characters, is

case sensitive and takes the form of a Network Access Identifier,

consisting of <name of the user>@<user’s home realm>. The

user’s home realm is optional and indicates the routing domain.

Password The password used for authentication. It may contain up to 63

ASCII characters and is case sensitive.

17

3.2.1.4 802.1x Setting-CA Server

Parameter Description

Use Certificate Chain When the EAP authentication type such as TLS, TTLS or PEAP is

selected and required a certification to tell the client what server

credentials to accept from the authentication server in order to

verify the server, you have to enable this function.

Certificate Issuer Choose the server from the list to issue the certificate. If “Any

Trusted CA” is selected, any CA included in the list (provided by

the Microsoft Certificate Store) is permitted.

Allow Intermediate Certificates A server designates an issuer as a trusted root authority by

placing the issuer's self-signed certificate, which contains the

issuer's public key, into the trusted root certification authority

certificate store of the host computer. Intermediate or subordinate

certification authorities are trusted only if they have a valid

certification path from a trusted root certification authority.

Server Name Enter the authentication server name.

Server name must match exactly When selected, the server name must match exactly the server

name found on the certificate.

Domain name must end in

specified name

When selected, the server name field identifies a domain. The

certificate must use a server name belonging to this domain or to

one of its sub-domains (e.g. zeelans.com, where the server is

blueberry.zeelans.com) but it may be any name used in the

certificate name field.

18

3.3 Link Status

From the “Link Status” option, you can view all the information of the network you are connecting to.

Parameter Description

Status Display the SSID and MAC ID of the network the adapter is

connecting to.

Extra Info Display the link status.

Channel Display the number of the radio channel and the frequency used

for the networking.

Link Speed (Mbps) Display the transmission and reception rate of the network. The

maximum transmission rate is 54Mbps.

Throughput (Kbps) Display the speed of data transmitted and received.

Link Quality This bar indicates the quality of the link. The higher the

percentage, the better the quality.

dBm If you want to know the signal strength in the unit of dBm, select

this check box.

Signal Strength This bar shows the signal strength level. The higher percentage

shown in the bar, the more radio signal been received by the

adapter. This indicator helps to find the proper position of the

wireless device for quality network operation.

19

Parameter Description

Noise Level Display the noise level in the wireless environment.

3.4 Statistics

This option enables you to view the statistic information of the connection including transmit statistics

and receive statistics. You may reset the counters by clicking ”Reset Counter”.

ʳ

3.5 Advance

This option enables you to configure more advanced settings, for example: wireless mode, protection

mode and etc.

20

Parameter Description

Wireless Mode 802.11 B/G mix – If you have a mix of 802.11b and 802.11g

wireless stations in your network, it is recommended to set the

adapter to this mode. This mode is also the default setting.

802.11 B only – This adapter can be compatible with both 802.11g

and 802.11b wireless stations. If there are only 802.11b wireless

stations in the network, you can set the adapter to this mode.

Ad Hoc Wireless Mode When the adapter is set in Ad Hoc (Peer to Peer Mode), you can

designate the wireless connection mode for the Ad Hoc network.

Only B – This adapter can be compatible with both 802.11g and

802.11b wireless stations. If there are only 802.11b wireless

stations in the network, you can set the adapter to this mode.

B/G Mixed – If you have a mix of 802.11b and 802.11g wireless

stations in your network, it is recommended to set the adapter to

this mode. This mode is also the default setting.

Only G – This adapter can be compatible with both 802.11g and

802.11b wireless stations. If there are only 802.11g wireless

stations in the network, you can set the adapter to this mode.

B/G Protection If you have a mix of 802.11b and 802.11g wireless stations in the

network, it is recommended to enable the protection mechanism.

This mechanism can decrease the rate of data collision between

802.11b and 802.11g wireless stations. When the protection mode

is enabled, the throughput of the adapter will be a little lower due to

many of frame traffic should be transmitted.

Auto – Based on the status of the network and automatically

disable/enable protection mode.

On – Always enable the protection mode.

Off – Always disable the protection mode.

Tx Rate There are several options including

Auto/1/2/5.5/11/6/9/12/18/24/36/48/54Mbps for you to select.

When the “Auto” is selected, the device will choose the most

suitable transmission rate automatically. The higher data rate you

designated in the network, the shorter distance is allowed between

the adapter and the wireless stations.

When the wireless mode is “802.11 B only”, the maximum data rate

is 11Mbps (11b) so that there are only “Auto/1/2/5.5/11Mbps”

options you can select.

21

Parameter Description

Tx BURST Tx Burst enables the adapter to deliver better throughput in the

same period and environment.

Enable TCP Window Size The TCP Window is the amount of data a sender can send on a

particular connection before it gets an acknowledgment back from

the receiver that it has gotten some of it. When the Router or AP

the adapter is connecting to have set up the TCP Window, you can

enable the parameter to meet the data size for the Router or AP

connection. The larger TCP Window the better performance.

Fast Roaming at -70dBm When you want to fast roaming to the network nearby without

intercepting the wireless connection especially the adapter is

applied to the multimedia application or a voice call, you can

enable the parameter. The adapter will fast roaming to the near

network when the receive sensitivity (signal strength) is lower to

the value you have set up.

Turn Off RF Button If you want to turn off the radio of the adapter temporarily, click this

button. To turn on the radio, click this button again.

CCX 2.0 CCX 2.0 (Cisco Compatible Extensions) is developed by Cisco for

the radio monitoring and fast roaming.

LEAP Turn on CCKM During normal operation, LEAP-enabled client devices mutually

authenticate with a new access point by performing a complete

LEAP authentication, including communication with the main

RADIUS server.

When you configure your wireless LAN for fast re-association,

however, LEAP-enabled client devices roam from one access point

to another without involving the main server. Using Cisco

Centralized Key Management (CCKM), an access point configured

to provide Wireless Domain Services (WDS) takes the place of the

RADIUS server and authenticates the client so quickly that there is

no perceptible delay in voice or other time-sensitive applications.

Enable Radio Measurement When this parameter is enabled, the Cisco AP can run the radio

monitoring through the associated CCX-compliant clients to

continuously monitor the WLAN radio environment and discover

any new APs that are transmitting beacons.

Non-Serving Channel

Measurements

The Cisco AP can perform monitoring measurements through the

CCX-compliant clients on the non-serving channels when this

parameter is enabled.

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Parameter Description

Limit xxx milliseconds (0-2000)

It limits the channel measurement time. The default value is 250
milliseconds.

3.6 QoS

This option enables you to configure QoS settings, for example: WMM, WMM - Power Save and Direct

Link Setup.

Parameter Description

WMM Enable Check on this item and click “Apply” to enable WMM function, and

then further you can configure WMM Power Save and Direct Link

Setup function.

WMM – Power Save Enable Check on this item to enable WMM Power Save function.

Click “Setting” to further configure WMM Power Save setting,

which includes: AC_BK, AC_BE, AC_VI and AC_VO.

Direct Link Setup Enable Check on this item and click “Apply” to enable DLS function.

Direct Link

Direct Link Setup

MAC Address Specify the MAC Address of the client adapter you want to direct

link to and click “Apply” to add into DLS Status table.

Timeout Value Specify the timeout value for the direct link you want to setup.

DLS Status The DLS Status displays all the direct link connections and you

can click “Tear Down” to stop any of them.

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3.7 About

By choosing this option, you can click the hyperlink to connect the website for the information of the

wireless chipset vendor and review basic information about the Utility such as the Driver, Utility and

EEPROM Version. The MAC Address of the adapter is displayed in the screen as well.

ʳ

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3.8 Turbo Mode

This adapter supports specific ways to increase the data transfer rate at a time; compress the data and

decrease the waiting time to send the next data to the Routers or APs, this feature (known as Turbo

Mode) enables higher throughput than IEEE 802.11g standard (Up to 54Mbps).

When the adapter is connecting to the Routers or APs with the proprietary Turbo Mode feature, the

Turbo Mode will be enabled automatically without any configuration.

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3.9 SoftAP

This adapter can run as a wireless AP. The relative configurations of the AP including channel, SSID,

MAC Address Filtering and so on are described as follows.

Right click the Ralink Configuration Utility icon on the system tray of Windows and select “Switch to AP

Mode” to turn on SoftAP function.

3.9.1 Config

The Config page enables you to configure the AP connection setting and other advanced functions.

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Parameter Description

Wireless Mode Selects the wireless mode supports by the AP.

802.11 B/G Mixed – The AP works in 11b+g mixed mode.

802.11 B Only – The AP works in 11b mode.

802.11 G Only – The AP works in 11g mode.

TX Rate There are several options including

Auto/1/2/5.5/11/6/9/12/18/24/36/48/54Mbps for you to select.

When the “Auto” is selected, the AP will choose the most suitable

transmission rate automatically. The higher data rate you

designated in the network, the shorter distance is allowed

between the AP and the wireless clients.

When the wireless mode is “802.11 B only”, the maximum data

rate is 11Mbps (11b) so that there are only “Auto/1/2/5.5/11Mbps”

options you can select.

Channel Select the number of the radio channel used by the AP. The

wireless adapters connected to the AP should set up the same

channel.

SSID The SSID (up to 32 printable ASCII characters) is the unique

name identified in a WLAN. The ID prevents the unintentional

merging of two co-located WLANs.

The default SSID of the AP is SoftAP-X. (X is the last number of

this adapter’s Mac Address) Wireless adapters connect to the AP

should set up the same SSID as the AP.

Use Mac Address Click this button to create a unique SSID based on the adapter’s

Mac Address.

Auth. vs. Security Click this button to further configure WLAN authentication and

security setting. Please refer to 3.9.1.1.

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Parameter Description

B/G Protection If you have a mix of 802.11b and 802.11g wireless clients in the

network, it is recommended to enable the protection mechanism.

This mechanism can decrease the rate of data collision between

802.11b and 802.11g wireless clients. When the protection mode

is enabled, the throughput of the AP will be a little lower due to

many of frame traffic should be transmitted.

Auto – Based on the status of the network and automatically

disable/enable protection mode.

On – Always enable the protection mode.

Off – Always disable the protection mode.

Preamble 802.11g wireless adapters support both long and short preamble,

but for 802.11b wireless adapters, supporting short preamble is

optional. The throughput will be better when using short preamble,

Long Preamble – 128 bits sync field.

Short Preamble – 56 bits sync field.

Beacon (ms) Here defines the time between two beacons, the default value is

100ms.

TX Power If you want to lower the transmit power of the AP for saving the

power of the system, you can select the lower percentages from

the list. The lower power will cause the lower signal strength and

the coverage range.

Tx BURST Tx BURST enables the AP to deliver better throughput in the

same period and environment.

No forwarding among wireless

clients

Hide SSID If “Hide SSID” checkbox is enabled, the AP will not appear in the

Enable this setting to force the wireless clients connected to this

AP not sharing information each other.

site survey list of any wireless clients. It means only the wireless

clients set the same SSID can connect to the AP. It avoids the AP

being connected by unauthorized users.

Use Short Slot Short slot time is 9 us and long slot time is 20 us.

Auto Channel Selection at next

boot

The AP will select a random channel at next booting.

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Parameter Description

Default Click to use with default value.

Apply Click to apply the setting change.

3.9.1.1 Auth. Vs. Security

This option enables you to configure the authentication mode and encryption algorithm used within the
AP.

Parameter Description

Authentication Type There are four types of authentication mode supported.

Open – No authentication is needed among the wireless network.

WPA-PSK - It is a special mode designed for home and small

business users who do not have access to network authentication

servers. In this mode, known as Pre-Shared Key, the user

manually enters the starting password in their access point or

gateway, as well as in each wireless station in the network.

WPA-PSK takes over automatically from that point, keeping

unauthorized users that don't have the matching password from

joining the network, while encrypting the data traveling between

authorized devices.

WPA2-PSK - WPA2-PSK is also for home and small business.

WPA-PSK/WPA2-PSK – When selecting this mode, the AP

supports both WPA-PSK and WPA2-PSK.

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Parameter Description

Encryption Type Not Use - Disable the encryption mode.

WEP - Enable the WEP Data Encryption. When the item is

selected, you have to continue setting the WEP Key.

TKIP - TKIP (Temporal Key Integrity Protocol) changes the

temporal key every 10,000 packets (a packet is a kind of message

transmitted over a network.) This ensures much greater security

than the standard WEP security.

AES - AES has been developed to ensure the highest degree of

security and authenticity for digital information and it is the most

advanced solution defined by IEEE 802.11i for the security in the

wireless network.

BOTH – When selecting this mode, the AP supports both TKIP

and AES.

WPA Pre-shared Key The WPA Pre-shared Key can be from 8 to 64 characters and can

be letters or numbers. This same key must be used on all of the

wireless stations in the network.

Group Rekey Interval This function is available when using WPA-PSK and WPA2-PSK

encryption algorithm. The key will change compliance with

seconds or beacon that user set.

Wep Key

(Key#1 ~ Key#4)

The WEP keys are used to encrypt data transmitted in the

wireless network. There are two types of key length: 64-bit and

128-bit. Select the default encryption key from Key 1 to Key 4 by

selected the radio button.

Fill the text box by following the rules below.

64-bit – Input 10-digit Hex values (in the “A-F”, “a-f” and “0-9”

range) or 5-digit ASCII characters (including “a-z” and “0-9”) as

the encryption keys. For example: “0123456aef“ or “test1”.

128-bit – Input 26-digit Hex values (in the “A-F”, “a-f” and “0-9”

range) or 13-digit ASCII characters (including “a-z” and “0-9”) as

the encryption keys. For example:

“01234567890123456789abcdef“ or “administrator”.

Show Password The password will be shown in clear text instead of in asterisk.

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3.9.2 Access Control

The Access Control page enables you to configure the access control policy used within the AP.

Parameter Description

Access Policy Disable – Disable the MAC Address filtering function.

Allow All – Only the wireless adapters with the MAC Address

listed in Access List can connect to the AP.

Reject All – The wireless adapters with the MAC Address listed in

Access List will be rejected to connect to the AP.

MAC Address MAC Address is a unique identification for hardware devices in the

network. It is a 12-digit hexadecimal values.

Access List Display all the MAC Address user adds.

Add Add the MAC Address to Access List.

Delete Delete the selected MAC Address from Access List.

Remove All Remove all the MAC Address from Access List.

Apply Click to apply the setting change.

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3.9.3 Mac Table

The Mac Table page displays the detail information of the wireless adapters connected to the AP.

Parameter Description

MAC Address The MAC Address of the wireless adapters connected to the AP.

AID The Association ID of current connection.

Power Saving Mode The supporting status of Power Saving Mode of the wireless

adapter connected.

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3.9.4 Event Log

The Event Log page displays all the event time and message. You may clear the table by clicking
“Clear”.

3.9.5 Statistics

The Statistics page displays the statistic information of the AP including transmit statistics and receive
statistics. You may reset the counters by clicking “Reset Counters”.

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3.9.6 About

The About page displays the basic information about the Utility, including Driver, Utility and EEPROM
Version. The MAC Address of the adapter is displayed in the screen as well.

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4 Troubleshooting

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This chapter provides solutions to problems usually encountered during the installation and operation

of the adapter.

1. What is the IEEE 802.11g standard?

802.11g is the new IEEE standard for high-speed wireless LAN communications that provides for

up to 54 Mbps data rate in the 2.4 GHz band. 802.11g is quickly becoming the next mainstream

wireless LAN technology for the home, office and public networks.

802.11g defines the use of the same OFDM modulation technique specified in IEEE 802.11a for

the 5 GHz frequency band and applies it in the same 2.4 GHz frequency band as IEEE 802.11b.

The 802.11g standard requires backward compatibility with 802.11b.

The standard specifically calls for:

A. A new physical layer for the 802.11 Medium Access Control (MAC) in the 2.4 GHz frequency

band, known as the extended rate PHY (ERP). The ERP adds OFDM as a mandatory new

coding scheme for 6, 12 and 24 Mbps (mandatory speeds), and 18, 36, 48 and 54 Mbps

(optional speeds). The ERP includes the modulation schemes found in 802.11b including

CCK for 11 and 5.5 Mbps and Barker code modulation for 2 and 1 Mbps.

B. A protection mechanism called RTS/CTS that governs how 802.11g devices and 802.11b

devices interoperate.

2. What is the IEEE 802.11b standard

The IEEE 802.11b Wireless LAN standard subcommittee, which formulates the standard for the

industry. The objective is to enable wireless LAN hardware from different manufactures to

communicate.

3. What does IEEE 802.11 feature support

The product supports the following IEEE 802.11 functions:

z CSMA/CA plus Acknowledge Protocol

z Multi-Channel Roaming

z Automatic Rate Selection

z RTS/CTS Feature

z Fragmentation

z Power Management

4. What is Ad-hoc

An Ad-hoc integrated wireless LAN is a group of computers, each has a Wireless LAN adapter,

Connected as an independent wireless LAN. Ad hoc wireless LAN is applicable at a

departmental scale for a branch or SOHO operation.

5. What is Infrastructure

An integrated wireless and wireless and wired LAN is called an Infrastructure configuration.

Infrastructure is applicable to enterprise scale for wireless access to central database, or

wireless application for mobile workers.

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6. What is BSS ID

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A specific Ad hoc LAN is called a Basic Service Set (BSS). Computers in a BSS must be

configured with the same BSS ID.

7. What is WEP

WEP is Wired Equivalent Privacy, a data privacy mechanism based on a 40 bit shared key

algorithm, as described in the IEEE 802 .11 standard.

8. What is TKIP?

TKIP is a quick-fix method to quickly overcome the inherent weaknesses in WEP security,

especially the reuse of encryption keys. TKIP is involved in the IEEE 802.11i WLAN security

standard, and the specification might be officially released by early 2003.

9. What is AES?

AES (Advanced Encryption Standard), a chip-based security, has been developed to ensure the

highest degree of security and authenticity for digital information, wherever and however

communicated or stored, while making more efficient use of hardware and/or software than

previous encryption standards. It is also included in IEEE 802.11i standard. Compare with AES,

TKIP is a temporary protocol for replacing WEP security until manufacturers implement AES at

the hardware level.

10. Can Wireless products support printer sharing

Wireless products perform the same function as LAN products. Therefore, Wireless products can

work with Netware, Windows 2000, or other LAN operating systems to support printer or file

sharing.

11. 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 series offer the encryption function (WEP) to enhance security and Access Control.

Users can set it up depending upon their needs.

12. What is DSSS

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 is, 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.

What is FHSSΛAnd what are their differences

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13. What is Spread Spectrum

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Spread Spectrum technology is a wideband radio frequency technique developed by the military

for use in reliable, secure, mission-critical communication 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 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).

14. What is WMM

Wi-Fi Multimedia (WMM), a group of features for wireless networks that improve the user

experience for audio, video and voice applications. WMM is based on a subset of the IEEE

802.11e WLAN QoS draft standard. WMM adds prioritized capabilities to Wi-Fi networks and

optimizes their performance when multiple concurring applications, each with different latency

and throughput requirements, compete for network resources. By using WMM, end-user

satisfaction is maintained in a wider variety of environments and traffic conditions. WMM makes it

possible for home network users and enterprise network managers to decide which data streams

are most important and assign them a higher traffic priority.

15. What is WMM Power Save

WMM Power Save is a set of features for Wi-Fi networks that increase the efficiency and

flexibility of data transmission in order to conserve power. WMM Power Save has been optimized

for mobile devices running latency-sensitive applications such as voice, audio, or video, but can

benefit any Wi-Fi device. WMM Power Save uses mechanisms included in the IEEE 802.11e

standard and is an enhancement of IEEE 802.11 legacy power save. With WMM Power Save,

the same amount of data can be transmitted in a shorter time while allowing the Wi-Fi device to

remain longer in a low-power “dozing” state.

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