Edimax Technology Network Card pmn80211b g WLAN USB adapter with Wi Fi Detector User Manual

802.11b/g WLAN USB Adapter  
with Wi-Fi Detector  
User’s Manual  
Version: 1.1  
(Mar 2006)  
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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 equipment must be installed and operated in accordance with provided  
instructions and a minimum 5 cm spacing must be provided between  
computer mounted antenna and person’s body (excluding extremities of  
hands, wrist and feet) during wireless modes of operation.  
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 Communication 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.  
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R&TTE Compliance Statement  
This equipment complies with all the requirements of DIRECTIVE 1999/5/CE  
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.  
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CONTENTS  
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1 Introduction  
Thank you for purchasing this 802.11b/g WLAN USB adapter with Wi-Fi Detector. This  
convenient device instantly detects wireless hotspots anywhere. The backlight LCM display  
tells the user detailed information about any detected hotspot. There’s no need to purchase  
any battery because there is a rechargeable Li-Polymer battery which recharges whenever  
the detector is inserted into any USB port.  
This Wi-Fi detector also allows the user to go online wirelessly and is designed to comply  
with IEEE 802.11g Wireless LAN standard. It is suitable for any laptop or desktop computer.  
This detector supports 64/128/256-bit WEP data encryption that protects your wireless  
network from eavesdropping. It also supports WPA (Wi-Fi Protected Access) and WPA2 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.  
This adapter has built-in AES engine which 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.  
1.1  
Features  
Complies with the IEEE 802.11b and IEEE 802.11g 2.4GHz standards.  
LCM displays: SSID, Signal Strength, Network type (802.11b/g), Network Mode  
(infrastructure, Adhoc), operating channel, number of AP’s detected, battery strength,  
Link/Act indicator)  
Up to 54Mbps high data transfer rate.  
Support 64/128/256-bit WEP, WPA (TKIP with IEEE 802.1x) and WPA2 (AES with IEEE  
802.1x) functions for high level of security.  
Supports Software AP function, which turns the wireless station into a wireless AP.  
Complies with IEEE 802.11d country roaming standard.  
Support the most popular operating system: Windows 98SE/Me/2000/XP.  
Supports USB 2.0/1.1 interface.  
Portable and mini-size design.  
Suitable for Any Notebook or Desktop PC.  
1.2  
Specifications  
Standard: IEEE 802.11g/b  
LCM Size: 96x32 with EL backlight  
Battery: 4.2V Rechargeable Li-Polymer Battery  
Bus Type: USB 2.0 Type A  
Frequency Band: 2.4000~2.4835GHz (Industrial Scientific Medical Band)  
Modulation: OFDM with BPSK, QPSK, 16QAM, 64QAM (11g)  
BPSK, QPSK, CCK (11b)  
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Data Rate: 54/48/36/24/18/12/11/9/6/5.5/2/1Mbps auto fallback  
Security: 64/128/256-bit WEP Data Encryption, WPA (TKIP with IEEE 802.1x) and WPA2  
(AES with IEEE 802.1x)  
Antenna: Internal Antenna  
Drivers: Windows 98SE/Me/2000/XP/2003 Server  
Transmit Power: 16dBm (Typical)  
Dimension: 14(H) x 28.5(W) x 91(D)  
Temperature: 32~140°F (0 ~60°C)  
Humidity: 0-85% (NonCondensing)  
Certification: FCC, CE  
1.3  
Package Contents  
Before you begin the installation, please check the items of your package. The package  
should include the following items:  
One Wi-Fi Detector  
One Quick Guide  
One CD (Driver/Utility/Manual)  
If any of the above items is missing, contact your supplier as soon as possible.  
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2 The Outward Appearance of the Wi-Fi Detector  
3
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3 How to charge the Wi-Fi Detector  
1. Remove the cap from the Wi-Fi Detector, slide the power switch to the “ON” position and  
carefully insert the USB connector into any available USB port on your computer. You  
will see the recharging screen.  
The battery strength indicator will be animated while the Wi-Fi detector is being recharged.  
The “Link/Act” icon will blink when the Wi-Fi detector is being used as a wireless USB  
adapter to surf the internet.  
2. When the Wi-Fi detector is finished recharging it will automatically stop charging the  
battery. When it is finished recharging the battery you will see “Charge Finish” displayed  
on the LCM and the battery strength indicator will stop blinking.  
3. If you slide the power switch to the “OFF” position when in recharging, the Wi-Fi  
detector will stop recharging the battery and you will see “Stop charging” displayed on  
the LCM and the battery strength indicator will stop blinking.  
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4 How to use the Wi-Fi Detector  
1. Slide the power switch to the “ON” position, and a welcome screen will greet the user.  
2. After the welcome screen is displayed the Wi-Fi detector will automatically enter  
scanning mode to detect Wi-Fi signals.  
In scanning mode the display will display the total number of both non-encrypted and  
encrypted Wi-Fi signals detected.  
3. Once scanning mode is complete, the detector will enter its standard display mode.  
The detector automatically sorts the signals by the following criteria:  
Non-encrypted AP’s according to signal strength followed by encrypted AP’s according  
to signal strength.  
3
4
2
5
1
6
7
8
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The Icons on the LCM display are displayed as follows:  
1. Operating Channel: Indicates the current operating channel of the detected Wi-Fi  
signal.  
2. Number of AP’s Detected: the left digit indicates which detected Wi-Fi signal is  
currently displayed and the right digit indicates the total amount of Wi-Fi signals  
detected.  
3. Encryption indicator: “WEP” for WEP encryption, “WPA” for WPA encryption, and  
“WPA2” for WPA2 encryption, and “OPEN” indicates it is a non-encrypted signal.  
4. “G” indicates the signal is a 802.11g wireless signal. “B” indicates the signal is a  
802.11b wireless signal.  
5. Signal strength indicator with 5 bars indicating the signal strength.  
6. “In” indicates the signal is an infrastructure mode signal, “Ad” indicates the signal  
is an Adhoc mode signal.  
7. Battery indicator with 3 bars indicating battery power. When the indicator is  
empty, please recharge the detector by inserting it into a USB port.  
8. SSID Indicator: Displays the SSID of the detected Wi-Fi signal, if the SSID is too  
long the SSID indicator will scroll to display the complete SSID.  
4. If the user wishes to detect a signal with a dedicated SSID, the user simply has to hold  
down the “scan” button for 4 seconds to enter “lock mode”. When the detector is in “lock  
mode” an icon with a capitalized “L” appears in the upper middle corner of the display.  
In “lock mode” the detector constantly refreshes the signal strength so the user can  
move around to find where the detected signal strength is the strongest.  
Just hold down the “scan” button for 4 seconds again to unlock the “lock mode”.  
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5 How to install the driver and utility  
Before you proceed with the installation, please notice following descriptions.  
Note1: Please do not install the USB adapter into your computer before installing the software  
program from the CD.  
Note2: The following installation was operated in Windows XP. (Procedures are similar for  
Windows 98SE/Me/2000/2003 Server.)  
Note3: If you have installed the Wireless PC Card driver & utility before, please uninstall the  
old version first.  
Please follow below instructions to install the USB adapter.  
I. Install the Configuration Utility  
A. Insert the Installation CD to your CD-ROM Drive. Execute the “setup” program.  
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B. If you want to install the software program in another location, click “Browse” and select  
an alternative destination. Then, click “Next”.  
C. Click “Continue Anyway” to finish the installation.  
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II. Install the USB adapter  
A. Plug the USB adapter into the USB port of your computer.  
B. The “Found New Hardware Wizard” is displayed, select “Install the software automatically  
(Recommended)” and click “Next”.  
C. Click “Continue Anyway” and the system will start to install the USB adapter.  
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D. Click “Finish” to complete the installation.  
III. Using the Configuration Utility  
To setup the USB adapter, double-click the icon in the system tray.  
For Windows XP, there is a “Windows Zero Configuration Tool” by default for you to setup  
wireless clients. If you want to use the Utility of the USB adapter, please follow one of the  
ways as below.  
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First Way  
A. Double-click the utility  
icon in the system tray.  
B. Click “Yes” to use the  
utility of the USB adapter.  
Second Way  
A. Double-click the icon.  
B. Click “Advance”.  
C. Uncheck “Use Windows to  
configure my wireless  
network settings”.  
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6 How to configure the utility  
The Configuration Utility is a powerful application that helps you configure the 802.11g  
Wireless LAN USB adapter and monitor the link status during the communication process.  
The Configuration Utility appears as an icon on the system tray of Windows while the  
adapter is running. You can open it by double-click on the icon.  
Right click the icon, there are some items for you to operate the configuration utility.  
z
Open Utility Window  
Select “Open Utility Window” to open the Configuration Utility tool.  
Exit ZDWlan  
z
Select “Exit ZDWlan” to close the Configuration Utility tool.  
Before using the utility, you have to know some restrictions of the utility.  
1. If you want to connect to 11g (up to 54Mbps) network, please ensure to install the  
adapter to PC or laptop with USB 2.0 interface. This adapter runs at lower performance  
while you connect it to the USB 1.1/1.0 port of your computer instead.  
2. This adapter will work in 11b mode when the network type is in Adhoc mode. It is  
defines by Wi-Fi organization. If you want to enable the data rate up to 54Mbps (11g),  
please follow steps listed below.  
A. Go to “Network Connections”.  
B. Right Click the “Wireless Network Connection” and select “Properties”.  
C. From the pop-up screen, click “Configure”.  
D. Enter into “Advanced” page of the “Properties” screen.  
E. Enable the setting of “IBSS_G_Mode”.  
6.1  
Wireless Connection Status  
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 device with the highest signal strength. From the screen, you may  
know all the infomration about the wireless connection.  
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Parameter  
Mode  
Description  
Station – Set the USB adapter a wireless client.  
Access Point – Turns the USB adapter to function as a wireless  
AP. Please refer to Section 6.5 for the AP settings.  
Network Adapter  
Available Network  
Display the product information of the USB adapter.  
Display all the SSID and Signal Strength of wireless stations  
nearby. To re-survey the available wireless devices please click  
“Refresh”.  
There are two ways to automatically make the connection  
between the USB adapter and the wireless station on the list.  
1. Double-click the wireless station on the list directly.  
2. Select the station you intend to connect and then click  
“Connect this site“.  
Current Network Information  
Display the information about the wireless network this adapter is  
connecting to. The information includes Channel, Type, SSID, TX  
Rate and Encrypt settings. Note: Please refer to Section 6.2 for  
the description of each item.  
More Setting  
For setting more functions including disable/enable WEP and  
Power Saving Mode, etc. Please refer to Section 6.2, 6.3 and 6.4.  
Link Status  
BSSID  
Display the status of the wireless connection.  
Display the MAC Address of the network the adapter is  
connecting to.  
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Parameter  
Description  
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 station for quality network operation.  
Link Quality  
TX Frame  
RX Frame  
This bar indicates the quality of the link. The higher the  
percentage, the better the quality.  
It shows the number of data frames which are transmitted by the  
adapter successfully.  
It shows the number of data frames which are received by the  
adapter successfully.  
6.2  
General Connection Setting  
Click “More Setting”, users are allowed to setup the wireless connection setting, Encryption  
Setting of the USB adapter and other advanced functions.  
Parameter  
Description  
General Connection Setting  
Channel  
Select the number of the radio channel used for the networking.  
The channel setting of the wireless stations within a network  
should be the same.  
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Parameter  
Tx Rate  
Description  
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 adapter works in 11b mode, the maximum data rate is  
11Mbps so that there are only “Auto/1/2/5.5/11Mbps” options you  
can select.  
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.  
Any  
If “Any“ check box is enabled, the adapter will survey and connect  
to one of the available wireless stations without checking the  
consistency of channel and SSID with the wireless station.  
Network Type  
Ad-Hoc – This mode enables wireless network adapters  
interconnecting without through AP or Router. Select this mode if  
there is no AP or Router in the network.  
Infrastructure – This operation mode requires the presence of an  
802.11 Access Point. All communication is done via the Access  
Point or Router.  
Change/Apply  
Click “Change“ will enable you to setup the parameters of  
“General Connection Setting“. In the meantime, the button will  
change to “Apply“ for you to confirm your settings.  
Encryption Setting  
In the block, users may enable/disable WEP and WPA encryption  
within the network. Please refer to Section 6.3 for more  
description.  
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Parameter  
Description  
Authentication Mode  
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 connect each other.  
Auto – Auto switch the authentication algorithm depending on the  
wireless networks that the adapter is connecting to.  
WEP Encryption Key Setting  
WPA Encryption Setting  
Click this button to setup the WEP key. Please refer to Section  
6.3 for the details.  
Click this button to setup the WPA function. Please refer to  
Section 6.3 for the details.  
Profile  
Profile Name  
You can save the network setting as a profile. To connect to the  
network without making additional configuration, you can load the  
profile.  
Load  
Load the setting values from the file in the “Profile Name“ list. The  
new settings will be activated immediately.  
Save Current  
Delete  
Input a file name and click “Save Current“ to write the current  
setting values to be a profile in the “Profile Name“ list.  
Delete the profile you select.  
Other  
Advanced Setting...  
For more advanced setting, please click it. To know more of the  
setting, please refer to Section 6.4.  
Information  
To view the version of the driver, firmware and the MAC Address  
of the adapter, click the button.  
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6.3  
WEP and WPA Encryption  
WEP is an data encryption algorithm, which protects Wireless LAN data in the network  
against eavesdropping. WEP has been found that it has some security problems. The  
adapter supports WPA (Wi-Fi Protected Access) 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. This adapter is also built-in AES  
engine which 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.  
6.3.1 WEP Setting  
Parameter  
Description  
Key Length  
You may select the 64-bit, 128-bit or 256-bit to encrypt  
transmitted data. Larger key length will provide higher level of  
security, but the throughput will be lower.  
Default Key ID  
Key Format  
Select one of the keys (1~4) as the encryption key.  
Hexdecimal – Only “A-F“, “a-f“ and “0-9“ are allowed to be set as  
WEP key.  
ASCII Numerical values, characters or signs are allowed to be  
the WEP key. It is more recognizable for user.  
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Parameter  
Description  
Key1 ~ Key4  
The keys are used to encrypt data transmitted in the wireless  
network. Fill the text box by following the rules below.  
64-bit – Input 10-digit Hex values or 5-digit ASCII values as the  
encryption keys. For example: “0123456aef“ or “Guest“.  
128-bit – Input 26-digit Hex values or 13-digit ASCII values as the  
encryption keys. For example:  
“01234567890123456789abcdef“ or “administrator“.  
256-bit – Input 58-digit Hex values or 29-digit ASCII values as the  
encryption keys.  
Change/Apply  
Clcik “Change“ will enable you to setup the WEP key. In the  
meantime, the button will change to “Apply“ for you to confirm  
your settings.  
6.3.2 WPA Setting  
The adapter can automatically detect the WPA setting of the AP which the adapter intends  
to connect to. To connect to the AP, you should setup the same setting with the AP.  
There are two kinds of WPA mode: WPA and WPA-PSK. WPA is designed for enterprise  
which requires a RADIUS Server and Certificate Server for the authentication. WPA-PSK is  
a special mode designed for home and small business users who do not have access to  
network authentication servers. In this mode, the user manually enters the starting  
password in their access point or gateway, as well as in each wireless stations in the  
network. WPA 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.  
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Parameter  
Description  
Connect Information  
Protocol  
It is the setting for WPA mode.  
This adapter supports two kind of protocol for authentication  
including TLS and PEAP. TLS and PEAP requires a certificate  
which is provided by the Certificate Server. PEAP requires a set  
of user name and password in addition. To get the certificate and  
the personal user name and password, please contact with your  
administrator.  
TLS – Select a certificate from the “Certificate“ list.  
PEAP – Input the “User Name“ and “Password“ and also select a  
certificate from the “Certificate“ list.  
User Name  
Password  
It is the setting for PEAP protocol.  
It is the setting for PEAP protocol.  
Pre-shared Key  
It is the setting for WPA-PSK mode. Input a 8 to 63 digits of ASCII  
format to be the password for the authentication within the  
network.  
Certificate  
All the available certificates for TLS or PEAP will display in the  
list. Please select a proper certificate for the wireless  
authentication.  
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Parameter  
WEP Key  
Description  
If the AP uses WEP data encryption function, please clcik “WEP  
KEY SETTING“ to setup the WEP key.  
WEP KEY SETTING  
Change/Apply  
Setup the four sets of WEP key by clicking the button.  
Clcik “Change“ will enable you to setup the WPA setting. In the  
meantime, the button will change to “Apply“ for you to confirm  
your settings.  
6.4  
Advanced Settings  
The “Advanced Setting” allows user to enable/disable country roaming and power  
consumption mode, setup the fragmentation threshold and RTS/CTS threshold of the  
adapter.  
Parameter  
Description  
User Interface  
Select the display language of the utility. Two languages are  
enabled: English and Chinese.  
Country Roaming  
IEEE 802.11d (Country Roaming) is a standard that enable the  
wireless devices work at the proper transmission power and radio  
channel regulated by the country where the user is located.  
World Mode – Enable the country roaming function, the adapter  
will follow the setting of the connecting AP automatically.  
User Select – Disable the country roaming function, users can  
select the country where they are located. The channel setting  
differs from country user selected.  
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Parameter  
Description  
Power Consumption Setting  
Continuous Access Mode (CAM) – The adapter will always set  
in active mode.  
Maximum Power-Saving Mode – Enable the adapter in the  
power saving mode when it is idle.  
Fast Power-Saving Mode – Enable the adapter in the power  
saving mode when it is idle, but some components of the adapter  
is still alive. In this mode, the power consumption is larger than  
“Max“ mode.  
Fragementation 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.  
RTS / CTS Threshold  
Minimum packet size required for an RTS/CTS (Request To  
Send/Clear to Send). For packets smaller than this threshold, an  
RTS/CTS is not sent and the packet is transmitted directly to the  
WLAN. Select a setting within a range of 0 to 2347 bytes. Minor  
change is recommended  
6.5  
Software AP Mode  
This adapter can run as a wireless AP. The relative configurations of the AP including  
channel, SSID, MAC Address Filtering, WEP encryption and so on are described as follows.  
6.5.1 AP Connection Status  
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Parameter  
Mode  
Description  
Station – Set the USB adapter a wireless client.  
Access Point – Turns the USB adapter to function as a wireless  
AP.  
Network Adapter  
Display the product information of the USB Adapter.  
Connect Station List  
Display all the MAC Addresses of the wireless adapters which are  
connecting to the AP.  
Current Network Setting  
More Setting  
Display the connection setting of the current network. It includes  
Channel, SSID, WEP and TX Power Level.  
For setting more functions including disable/enable WEP, MAC  
Address Filter and Bridge Adapter, etc. Please refer to Section  
6.5.2.  
TX Frame  
RX Frame  
It shows the number of data frames which are transmitted by the  
AP successfully.  
It shows the number of data frames which are received by the AP  
successfully.  
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6.5.2 AP General Connection Setting  
Click “More Setting”, users are allowed to setup the AP connection setting, Encryption  
Setting and other advanced functions.  
Parameter  
Description  
General Connection Setting  
Channel  
Select the number of the radio channel used by the AP. The  
wireless adapters which connects to the AP should set up the  
same channel.  
Basic Rate  
Select the basic data transmission speed supports by the AP.  
When the AP works in 11b mode, the maximum data rate is  
11Mbps so that there are two options including “1, 2 Mbps“ and  
“1, 2, 5.5, 11Mbps” you can select.  
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Parameter  
Tx Rate  
Description  
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 adapter works in 11b mode, the maximum data rate is  
11Mbps so that there are only “Auto/1/2/5.5/11Mbps” options you  
can select.  
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 WLAN_AP. Wireless adapters  
connect to the AP should set up the same SSID as the AP.  
Hide SSID  
If “Hide SSID“ check box is enabled, the AP will not appear in the  
site survey list of any wireless adapters. It means Only the  
wireless adapters set the same SSID can connect to the AP. It  
aviods the AP being connected by unauthorized users.  
Tx Power  
There are four levels for you to setup the transmission power of  
the AP. The higher transmission power, the larger transmission  
distance and wireless coverage.  
Change/Apply  
Clcik “Change“ will enable you to setup the parameters of  
“General Connection Setting“. In the meantime, the button will  
change to “Apply“ for you to confirm your settings.  
WEP  
Enable or disable WEP encryption function. If the WEP function is  
enabled, only wireless adapters with the same default key and  
WEP key setting can connect to the AP.  
Setting  
Click “Setting“ to setup the WEP key. Please refer to Section 6.3  
for more description.  
Authentication Mode  
Open System – No authentication is needed for connecting to the  
AP.  
Shared Key – Only wireless adapters using a shared key (WEP Key  
identified) are allowed to connecting to the AP.  
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Parameter  
Fragement  
Description  
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.  
RTS / CTS  
Minimum packet size required for an RTS/CTS (Request To  
Send/Clear to Send). For packets smaller than this threshold, an  
RTS/CTS is not sent and the packet is transmitted directly to the  
WLAN. Select a setting within a range of 0 to 2347 bytes. Minor  
change is recommended.  
Preamble  
The preamble defines the length of the CRC block for  
communication among the wireless networks. There are two  
modes including Long and Short. High network traffic areas  
should use the shorter preamble type.  
MAC Address Filter  
Bridge Adapter  
This AP can protect from the unauthorized users by MAC Address  
filtering. Please refer to Section 6.5.3.  
Wireless adapters connect to the AP can access to the wired  
network through the bridge adapter. You can select an Ethernet  
adapter in the list be the bridge between the wireless and wired  
networks.  
6.5.3 MAC Address Filter  
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Parameter  
Filter Type  
Description  
Disable – Disable the MAC Address filter function.  
Accept – Only the wireless adapters with the MAC Address setup  
in the table can connect to the AP.  
Reject – The wireless adapters with the MAC Address setup in  
the table will be rejected to connect to the AP.  
Filter MAC Address  
MAC Address is a unique identification for hardware devices in  
the network. It is a 12-digit hexadecimal values.  
There are fifty sets of MAC Address can setup in the table. Fill the  
MAC Addresses of wireless adapters you want to accept or reject  
to access the AP in this table.  
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7 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?  
802.11g 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:  
zCSMA/CA plus Acknowledge Protocol  
zMulti-Channel Roaming  
zAutomatic Rate Selection  
zRTS/CTS Feature  
zFragmentation  
zPower 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.  
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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.  
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.  
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12. What is DSSSWhat is FHSSAnd 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.  
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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