Edimax Technology EW-7316Ug User Manual

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User Manual

Ve rsion: 1.0 (July, 2008)

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 incident al 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.

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 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.

The antenna(s) used for this transmitter must not be co-located or operating in
conjunction with any other antenna or transmitter .

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 20cm (8 inches)
during normal operation.

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,
Bulgaria, Cyprus, Czech Republic, Estonia, Hungary, Latvia, Lithuania, Malta, Poland,
Romania, Slovakia, Slovenia, 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
Please check the declaration of conformity on www.edimax.com

CONTENTS

1. PRODUCT INTRODUCTION................................................................... 2

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

2.1 Specifications.................................................................................................2

2. PACKAGE CONTENTS..........................................................................3

3. HARDWARE INSTALLATION.................................................................4

4. SOFTWARE INSTALLATION ................................................................. 5

5. CONNECT TO WIRELESS ACCESS POINT............................................ 8

5.1 Using Realtek Wireless Configuration Utility ................................................8

5.2 Using Windows Zero Config..........................................................................12

6. CONFIGURATION UTILITY.................................................................. 16

6.1 Utility Overview............................................................................................16

6.2 Available Network........................................................................................18

6.3 General..........................................................................................................19

6.4 Profile............................................................................................................20

6.4.1 Configure the Profile .......................................................................21

6.5 Advanced......................................................................................................25

6.6 Status............................................................................................................27

6.7 Statistics.......................................................................................................27

6.8 Software AP..................................................................................................28

6.8.1 AP Properties Setting......................................................................29

6.8.2 AP Advanced....................................................................................29

6.8.3 AP Statistics......................................................................................30

6.8.4 SoftAP................................................................................................31

7. RT-SET WIZARD ................................................................................. 32

8. TROUBLESHOOTING.......................................................................... 35

1. Product Introduction

Thank you for purchasing Edimax Wireless 802.11b/g LAN USB Adapter. This
adapter complies with IEEE 802.11g standard, which supports up to 54Mbps
high-speed wireless network connections. It can also work with IEEE 802.11b devices.
When the adapter connects to 11b devices, the link speed will be up to 11Mbps.

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 technology. 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.

The power consumption of the adapter is also very low. Furthermore, this adapter
provides several levels of power saving modes allowing user customizes the way of
saving the power from his/her portable or handheld devices.

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

1.1 Features

z Complies with IEEE 802.11b/g Standards.
z Supports data transfer rate up to 54Mbps.
z Supports high throughput for multi-media data bandwidth requirement.
z Support 64/128-bit WEP, WPA & WPA2 Encryption.
z Supports operating system: Windows 98SE/Me/2000/XP/Vista, Mac and Linux
z Supports USB 2.0 interface.

2.1 Specifications

z Standard: IEEE 802.11b/g
z Interface: USB 2.0 Type A
z Frequency Band: 2.4000 ~ 2.4835GHz (Industrial Scientific Medical Band)
z Modulation: OFDM with BPSK, QPSK, 16QAM, 64QAM (11g)
z BPSK, QPSK, CCK (11b)
z Data Rate: 54/48/36/24/18/12/11/9/6/5.5/2/1Mbps auto fallback
z Security: 64/128-bit WEP Data Encryption, WPA/WPA2 (TKIP with IEEE 802.1x) and AES
z Antenna: Printed Antenna
z Drivers: Windows 98SE/Me/2000/XP/Vista
z LEDs: Link/Activity
z Transmit Power: 11g: 14±1dBm, 11b: 17±1dBm
z Dimension: 9(H) x 27(W) x 87(D) mm
z Temperature: 32~131°F (0 ~55°C)
z Humidity: Max. 95% (NonCondensing)
z Certification: FCC, CE

2

2. Package Contents

Before you starting to use this Wireless USB Adapter, please check if there’s anything missing in the
package, and contact your dealer of purchase to claim for missing items:

 One Wireless USB Adapter
 One USB cable
 One Quick Installation Guide
 One CD-ROM (Including Multi-language QIG, User’s Manual and Driver/Utility)

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

3

3. Hardware Installation

Please follow the instructions as below to install your new Wireless USB Adapter:

Step 1. Please insert the Wireless USB Adapter into an available USB 2.0 port of your computer. We
recommend you to insert the adapter after the software of driver/utility has been installed.

Step 2. The following message may appear on your computer under Windows OS XP, please select

“No, not this time” and click ‘Next’.

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4. Software Installation

This wizard can be run in Windows 2000/XP/XP64/2003/Vista. The following procedures are operated
in Windows XP. (Procedures are similar for Windows 2000/XP/XP64/Vista.)

1. Insert the CD shipped along with the product into your CD-ROM drive. The Windows Vista will
popup AutoPlay window, Please select “Install or run program” to execute Autorun.exe program.
The Autorun.exe program should be executed automatically. If not, run Autorun.exe manually from
“Autorun” folder in the CD.

2. The follow ing screen will be displayed. Click “Setup Utility” to run the setup wizard.

3. Please Select the Setup Language and click “Next” to proceed.

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4. Please Click “Next” to start installing driver and utility

5. Please click “install” to start the installation

6

6. The driver and utility is installing, please wait a while.

7. When you see this message, please click ‘Finish’ to complete the driver installation process.

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5. Connect to Wireless Access Point

Using Configuration Utility to Connect to Wireless Access Point

5.1 Using Realtek Wireless Configuration Utility

1. After installation is complete, wireless configuration utility will be shown an icon at your windows

desktop as below. Please click the icon by right mouse key to lunch the configuration utility.

2. Configuration utility will scan for wireless access points automatically, and all found access points

will be displayed on “Available Network”. Please select an access point you wish to connect, and
click ‘Add to Profile’. If the wireless access point you want to connect does not show here, please
click ‘Refresh’

3. If the wireless access point uses encryption, you have to input WEP passphrase or WPA

preshared key. Please ask the owner of the wireless access point you want to connect, and input
the correct passphrase / preshared key at “Network key” & “Confirm network key”, then click ‘OK’.

If the value you inputted here is wrong, you will not be able to connect to wireless access point.

Authentication type is selected automatically, please don’t change it.

8

9

4. The utility will automatically add the access point at Wireless Utility Profile.

10

5. If the wireless access point is successfully connected, you’ll see a connected icon

at the lower-left corner of wireless configuration utility window and click ‘Close’ to exit.

displayed

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5.2 Using Windows Zero Config

1. After lunch wireless configuration, Please select “Windows Zero Config” and click “OK” to disable
the utility of the adapter..

2. Please lunch Windows Zero Config by double-click the wireless connection icon in the lower-left
corner on Windows desktop.

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3. The Windows Zero Config Panel will pup-up. Please select the wireless access point which you
want to connect and click “Connect”

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4. If the wireless access point without encryption, there is warning window will pup-up. Please click
“Connect Anywhere”.

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5. When you see the “Connected” shows on the Windows Zero Config window, the wireless is
successfully connected.

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6. Configuration Utility

The Configuration Utility is a powerful application that helps you configure the Wireless LAN USB
Adapter and monitor the link status and the statistics during the communication process.

The Configuration Utility appears as an icon on the system tray and desktop of Windows. You can open
it by double-click on the icon.

In the Desktop In the System Tray

Right click the icon in the system tray there are some items for you to operate the configuration utility.

z Open Config Utility

Select “Open Config Utility” to open the configuration utility.

z RT-Set Wizard

Select “RT-Set Wizard” to open the RT-Set wizard.

z About

Select “About” to show the utility information.

z Hide

Select “Hide” to hide the utility in the system tray.

6.1 Utility Overview

There are several parts in the utility screen. Please refer to the following table for the description.

A

B

E

C

D

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Parameter Description

A

This is a list for you to configure several adapters in your PC from

B

Refresh – Refresh adapter list in the “B“ block.
RT-Set – Open the RT-Set wizard.
Mode – There are two modes: Station and Access Point. If

“Station“ is selected, the adapter works as a wireless adapter. If
“Access Point“ is selected, the adapter will works as a wireless AP.
View – Enable “Status Bar“ and the “D“ block in the utility will
display the current status of the utility.
About – To check the version of the utility, select this item.

the utility.

Show Tray Icon – To show the icon in the system tray, select the

C

It is the status bar that displays the current status of the utility. To

D

item.
Windows Zero Config – To configure the adapter from Windows
XP Zero Configuration, check the item.
Radio Off – This function is for you to turn off or turn on the radio
of the adapter. If the radio is turned off, the adapter will not work.
Disable Adapter – This function is for you to disable or enable the
adapter.

close it, please disable the “Status Bar“ in the “View“ item.

There are several tabs in the block for you to setup the function of

E

the adapter. Please refer to the description in the following
sections.

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6.2 Available Network

When you open the 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
network with the highest signal strength. From the “Available Network” tab, all the networks nearby will
be listed. You can change the connection to another network.

Parameter Description
Available Network(s) This list shows all information of the available wireless networks

within the range of your adapter. The information includes SSID,
Channel, Encryption, Network Authentication, Signal and etc. If
you want to connect to any network on the list, double-click the
selected network.

Refresh Click “Refresh“ to update the available networks list. It is

Add to Profile A profile stores the setting of a network, so that you can connect to

recommended that refresh the list while you have changed the
connection network.

the network quickly. To add the selected network to a profile, click
this button.

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6.3 General

To check the connection status of the adapter, select “General“. This screen shows the information of
Link Speed, Network Type, Encryption Method, SSID, Signal Strength, Link Quality and Network
Address of the adapter.

Parameter Description
Status

Speed

Type Infrastructure – This operation mode requires the presence of an

Encryption It displays the encryption setting of the current connection

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

Signal Strength

It will show the connection status of the adapter.

It shows the current speed

802.11 Access Point. All communication is done via the Access
Point or Router.

IBSS – Select this mode if you want to connect to another
wireless stations in the Wireless LAN network without through an
Access Point or Router.

including None, WEP, TKIP or AES.

name identified in a WLAN. The ID prevents the unintentional
merging of two co-located WLANs.

It indicates the wireless signal strength.

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Parameter Description
Link Quality

Network Address It shows the MAC, IP address and other information of the

It indicates the wireless link quality.

adapter.

6.4 Profile

The “Profiles List” is for you to manage the networks you connect to frequently. You are able to
Add/Remove/Edit/Duplicate/Set Default to manage a profile.

Parameter Description
Available Profile(s) This list shows the preferred networks for the wireless connection.

You can add, remove, edit, duplicate the preferred networks or set
one of the networks as the default connection.

Add/ Remove/ Edit Button

Duplicate If you like to build up the new profile with the same settings as the

Set Default To designate a profile as the default network for the connection

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

current profile, then you can select this feature.

from the available profiles list, click the button.

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6.4.1 Configure the Profile

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

networks.

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

This is a computer-to-computer (ad
hoc) network; wireless access
points are not used.

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

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.

There are two kinds of network type described as follows.
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 – Connect to another wireless adapter in the Wireless
LAN network without through an Access Point or Router.

If this item is selected, the adapter will work in Ad Hoc mode.

of the radio channel used for the networking. The channel setting
should be the same with the network you are connecting to.

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Parameter Description
Network Authentication This setting has to be consistent with the wireless networks that

the adapter intends to connect.
Open System – No authentication is needed among the wireless
network.

Shared Key – Only wireless stations using a shared key (WEP
Key identified) are allowed to connecting each other.

WPA 802.1X – 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.

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 stations 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 802.1X – 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 WP A 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).

WEP 802.1X – It’s a special mode for using IEEE 802.1x/EAP
technology for authentication and WEP keys for data encryption.

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Parameter
Data Encryption Disabled – Disable the WEP Data Encryption.

ASCII WEP Key can be ASCII format. Alphanumeric values or signs are

Passphrase It is a text string with a maximum of 32 alphanumeric characters,

Network Key The keys are used to encrypt data transmitted in the wireless

Description

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 insures 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.

Note: All devices in the network should use the same encryption
method to ensure the communication.

allowed to be the WEP key. It is more recognizable for user.

for example: “Test“. The WEP Key is based upon the Passphrase
determined by you. This passphrase may not work with other
vendors’ products due to possible incompatibility with other
vendors’ passphrase generators. You must use the same
passphrase or WEP key settings for all wireless computers within
the network.

network. Fill the text box by following the rules below.
64-bit – Input 10-digit Hex values as the encryption keys. For
example: “0123456aef“.

128-bit – Input 26-digit Hex values as the encryption keys. For
example: “01234567890123456789abcdef“.

Confirm Network Key Enter the same network key to confirm.

Key Index (advanced) Select one of the four keys to be the data encryption key.

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Parameter Description
EAP T ype GTC – GTC is an authentication protocol which allows the

exchange of clear text authentication credentials across the
network.

TLS – 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.

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.

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, MSCHAP, MSCHAPv2 and PAP. PEAP
specifies that an EAP-compliant authentication protocol must be
used; this adaptor supports MD5, TLS, GTC (Generic Token Card)
and MSCHAPv2. The client certificate is optional required for the
authentication.

Tunnel Includes MD5, GTC, TLS, CHAP, MSCHAP, MSCHAP-v2 and

PAP .

Username The certificate username in the RADIUS server.

Identity User’s identity in the RADIUS server.

Password User’s password in the RADIUS server.

Certificate The certificate for RADIUS server for certification.

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6.5 Advanced

The “Advanced” option enables you to configure more advanced settings, for example: Power Save,
Turbo Mode, Wireless Mode and etc.

Parameter Description
Power Save None – The adapter will always set in active mode.

Min – Enable the adapter in the power saving mode when it is
idle, but some components of the adapter are still alive. In this
mode, the power consumption is larger than “Max“ mode.

Max – Enable the adapter in the power saving mode when it is
idle.

Turbo Mode Off – Turn off the turbo mode.

Wireless Mode 802.11 b – This adapter can be compatible with both 802.11g and

On – Turn on the turbo mode.

Auto – The adapter will detect the AP is RTL8186-based AP or

not to transmit data in turbo mode automatically.

802.11b wireless stations. If there are only 802.11b wireless
stations in the network, you can set the adapter to this mode.

802.11 g/b – If you have a mix of 802.11b and 802.11g wireless
stations in your network, it is recommended to setting the adapter

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to this mode.

Parameter Description
Preamble Mode The preamble defines the length of the CRC block for

communication among the wireless stations. There are three
mode including Long, Short and Auto. High network traffic areas
should use the shorter preamble type. If “Auto“ mode is selected,
the adapter will auto switch the preamble mode depending on the
wireless stations that the adapter is connecting to.

Note that the parameter is only active in the Ad Hoc operation
mode.

PSP XLink Mode

WMM Parameter QoS Enable – Enable this function to support WMM.

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

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

Enable this function to support PSP XLink.

Power Save (APSD) Enable – Enable this function to support
WMM Power Save.

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 2432 bytes.
Minor change is recommended.

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 2432 bytes. Minor change is
recommended.

Set Defaults Let the setting values return to default.

Apply Confirm the settings in the “Advanced“.

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6.6 Status

This screen shows the information of manufacturer, driver version, settings of the wireless network the
adapter is connecting to, linking time and link status. If you don’t ensure the status of the adapter and
the network you are connecting, please go to the screen for more details.

6.7 Statistics

You can get the real time information about the packet transmission and receiving status during
wireless communication from the screen. If you want to recount the statistics value, please click
“Reset“.

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6.8 Software AP

This adapter can run as a wireless AP. The relative configurations of the AP including channel, SSID,
WEP encryption and so on are described as follows.

Parameter Description
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 Full Computer Name + “_AP“.
Wireless adapters connect to the AP should set up the same SSID
as the AP.

BSSID

Associate Table All the wireless adapters connected to the software AP will be

Config

Display the MAC address of the adapter.

displayed in the list.

Click “Config“ for setting more configuration of the AP.

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6.8.1 AP Properties Setting

Please refer to Section 3.4.1 for the setting of the parameters for AP. Note that Ad Hoc mode is not
enabled for AP.

6.8.2 AP Advanced

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Parameter Description
Beacon Interval Beacon Interval that specifies the duration between beacon

packets (milliseconds). The range for the beacon period is
between 20-1000 milliseconds with a typical value of 100.

DTIM Period Determines the interval the Access Point will send its broadcast

Data Rate The preamble defines the length of the CRC block for

WMM Parameter Power Save (APSD) Enable – Enable this function to support

Set Defaults

Apply

traffic. Default value is 3 beacons.

communication among the wireless stations. There are three
mode including Long, Short and Auto. High network traffic areas
should use the shorter preamble type. If “Auto“ mode is selected,
the AP will auto switch the preamble mode depending on the
wireless adapters.

WMM Power Save.

Set the setting values return to defaults.

Confirm the settings in the “Advanced“.

6.8.3 AP Statistics

You can get the real time information about the packet transmission and receiving status during
wireless communication from the screen. If you want to recount the statistics value, please click
“Reset“.

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6.8.4 SoftAP

If you want to connect to the internet through this SoftAP, you will need to make a bridge between our
SoftAP and your internet connect. Select the internet connection in your SoftAP host machine and
press the “Apply” button.

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7. RT-Set Wizard

The RT-Set wizard can help users to connect to a wireless LAN or build an Ad-hoc wireless network.
For example, if you want to connect to a wireless LAN in infrastructure mode:

A. Open the RT-Set wizard and choose the Station (infrastructure) mode.

B. The site survey results will show up. Please select the one you’d like to connect to and click the

“Next” button.

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C. In the Wireless network properties dialog, please fill in the security settings for this wireless network

you’d like to connect to.

D. Please specify the IP settings for this wireless network and click the “Finish” button.

33

E. Now you can connect to the wireless network successfully.

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8. Troubleshooting

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

1. What is the IEEE 802.11g standard?

802.1 1g 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

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wireless application for mobile workers.

6. What is BSS ID？

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？What is FHSS？And what are their differences？

Frequency-hopping spread-spectrum (FHSS) uses a narrowband carrier that changes frequency
in a pattern that is known to both transmitter and receiver. Properly synchronized, the net effect
is to maintain a single logical channel. To an unintended receiver, FHSS appears to be
short-duration impulse noise. Direct-sequence spread-spectrum (DSSS) generates a redundant
bit pattern for each bit to be transmitted. This bit pattern is called a chip (or chipping code). The
longer the chip 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.

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13. What is Spread Spectrum？

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).

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