Buffalo WLA2-G54C User manual

54Mbps Wireless Bridge Base Station
User Manual
WLA2-G54C

1
INTRODUCTION
1.1 AirStation 54Mbps Bridge Base Station (WLA2-G54C)
This User Manual introduces you to the High-Speed AirStation 54Mbps Bridge Base Station and will assist you with the more advanced
features of the product.
The AirStation 54Mbps Bridge Base Station , WLA2-G54C, is a wireless network access point that can be added to an existing network
(LAN) to create a wireless network or added to an existing WLAN to extend the range of the WLAN. The WLA2-G54C complies with
the IEEE 802.11g wireless standard and is interoperable with the IEEE 802.11b wireless standard. IEEE 802.11g technology features
longer range than IEEE 802.11a and greater bandwidth with data rates up to 54 Mbps in the turbo mode. The WLA2-G54C supports
Wi-Fi Protected Access™, AES, 802.1x and WEP for security. The WLA2-G54C supports the Wireless Distribution System (WDS) and
can be used as a multi-functional bridge/link between wired and wireless LANs. The WLA2-G54C has a built-in 10/100M 4-port switch
to incorporate features of wired and wireless networking environments.
1.2 AirStation Wireless Network Features
Summary of the AirStation WLA2-G54C features:
• AOSS automatically creates a secure connection between your AOSS Access Point and client.
• Wi-Fi™ (Wireless Fidelity) certified AirStation will communicate with other Wi-Fi compliant 802.11g wireless LAN products.
• Wi-Fi Protected Access™ (WPA), AES, 802.1x and WEP for protecting data.
• Automatic Transmit Rate Select mechanism transmits at speeds of 24, 12, 11, 5.5, 2 and 1 Mbps.
• Supports turbo mode of 36, 48 and up to 54 Mbps.
• Wireless Bridge System (WDS) support for multi-point communication.
• Ability to set a fixed data rate for faster than 11Mbps ignoring 802.11b legacy devices.
• Auto roaming, supports seamless roaming over multiple channels.
• Wi-Fi Protected Access™ support.
• EAP-TLS, expanding the 802.1x authentication method.
• Up to 128bit Wired Equivalent Privacy (WEP) data encryption.
• Packet Filtering for eliminating unwanted communications.
• Syslog transmits some or all system activities to a central Syslog server.
• Extended range, with optional add-on 2.4GHz antennas.
• Auto Media Dependent Interface/Crossover (MDI/X) port, allows connection by standard and crossover CAT5 cables.
• Optional external 2.4 GHz antennas for boosting range and signal quality.
• Improved resistance to environmental conditions.
1.3 AirStation 54Mbps Bridge Base Station Package
The AirStation WLA2-G54C package consists of the following items.
1. WLA2-G54C
2. AC adapter with Int’l Adapters
3. CAT5 straight cable
4. Quick Setup Guides
5. WLA2-G54C Utility CD with Manuals
6. Warranty Statement
7.Wall mounting kit
1.4 Product Views

2
1.5 About the AirStation CD
Prior to copying or installing the software, please read the Software License Agreement “license.txt”, located in the root folder of the
CD. By installing, copying or using the AirStation software, you are consenting to the terms of this agreement. If you do not agree to
all of the terms of the Software License Agreement, do not download, copy or install the AirStation software.
It is the policy of Buffalo Technology to improve products as new technology, components, software and fi rmware become available.
Before you proceed with the installation of this product, please consult the Buffalo website (indicated last page) to download and
install the latest software for your product.
BASIC SETUP
2.1 Using AirNavigator For easy setup, the WLA2-G54C CD contains a web-based utility, AirNavigator. Use it to set up the
wireless LAN environment for both AP and PC (client). The system requires Explorer 4.0 or higher, or Netscape Com mu ni ca tor 4.0
or higher.
To set up the parameters manually, refer to Chapter 3. Before installation, verify
the PC is set up for browsing the Internet.
1. Insert the AirNavigator CD into the CD drive. The following screen will ap-
pear. For AirStation setup, select “Setup the BaseStation” and click OK.
2. The Network Adapter confi rmation screen will appear. Verify the adapter shown
matches that of the PC.
3. A login screen will appear.
• Enter “root” as the User name.
• Leave the Password box blank (do not enter anything into the Password box) and
click OK.

3
If the following screen is shown, con nec tion to the WLA2-G54C is
complete.
If the following screen is shown, con nec tion to the WLA2-G54C
is complete.
4 Click Finish.
5 To place a shortcut icon on the desktop, click Yes. Oth er wise,
click No.

4
Select the Type of encryption and click “Next” to input a password or encryption
code to protect wireless com mu ni ca tions.
WEP - It is possible to enter up to 4 different WEPs. The WEP key must match
between two parties for secure com mu ni ca tions.
Examples of WEP key:
64bit ASCII: 5 digits of alphanumeric characters, “ab34Y”
128bit ASCII: 13 digits of alphanumeric characters, “123456abcdef7”
64bit HEX: 10 digits, using characters 0-9 and a-f, “00234ABCDE”
128bit HEX: 26 digits, using characters 0-9 and a-f, “20123456789abcdeabcdeab
cde”
TKIP (Temporal Key Integrity Protocol) - A WEP expanded encryption technique. TKIP has greatly improved WEP’s weaknesses by rotating secret
keys between every packet.
Characteristics:
• The Initialization Vector is expanded from 24 bits to 48 bits.
• The Initialization Vector is randomized.
• Uses a different RC4 key for every packet
AES (Advanced Encryption Standard) - A next generation encryption technique discussed by the IEEE 802.11i committee.
TKIP improves WEP’s weakness, however AES also changes the encryption method away from the weaker RC4 style.
Throughput decreases 10 to 20 percent when TKIP software encoding is used. AES doesn’t decrease performance at all because it uses a hardware
co-processor.
Characteristics:
• USA government uses same encryption method. AES encryption has not been hacked to date.
• The hardware co-processor contributes less throughput loss then other forms of encryption.
3.4 Simple Setting for Wireless MAC Filter
• Click “Wireless MAC Filter” and then “Next” to set up MAC address restriction in LAN.
STANDARD SETTINGS
3.1 Introduction
Setting up the AirStation parameters using a Web Browser requires basic wireless confi guration knowledge. For Advanced settings and explanations
of each parameter and its use, see Chapter 4.
3.2 Setup Overview
The WLA2-G54C is confi gured to function right out of the box. Simple settings for security and MAC Address registration are offered in this sec-
tion, Specialized setups for security, fi ltering and other features will be explained in later sections by clicking the Advanced Button.
3.3 Open the Setup Screen
• Click “Encrypt the wireless communications (WEP/TKIP/AES)” to enter Encryption setting to protect your wireless data.
Input MAC addresses that is to be allowed to communicate.

5
USING AIRSTATION FOR ADVANCED CONFIGURATIONS
Although your AirStation will function fine using only the settings from Section 3, you may wish to explore more advanced
options. This chapter explains each parameter in the Advanced button. Click the Top tab and click the Advanced button.
4.1 LAN Setting
4.1.1 Wireless
Wireless Radio - Enable or disable wireless
communication
Wireless Mode - Select one of the following:
Mixed - Allows communication of 11g and
11b devices. Communication speed will drop to
11Mbps when 11b devices are connected.
11g-only - Boosts 11g devices to turbo 54Mbps
mode.
11b-only - Use only the IEEE802.11b (11Mbps
WiFi compatible) standard.
SSID - Allows administrator to alter the SSID
of the AirStation. Default SSID is the LAN MAC
Address. To communicate with a specific AP
only, the AP’s SSID must be entered in the client
PC. The client PC looks for the specifi c AP (or
SSID) for wireless communication. Use up to
32 al pha nu mer ic characters for the SSID (case
sensitive).
■ Note: Roaming - When multiple AirStations have an identical SSID, and WEP client PCs may Roam between the AirStations.
Wireless Channel - Select the channel used for wireless communication. There are 11 overlapping channels. Channels 1, 6 and 11
are non-overlapping.
If there are multiple APs in close proximity using the same channel, there may be interference. In this case, change to a non-overlapping
channel.
■ Note: This parameter is automatically set in the client computer.
Privacy Seperator - Select Use or do not use to block communication between each wireless LAN PC on the wireless network.
If you choose to use, every wireless LAN PCs that is associated to the same AirStation can not communicate with each other. Even if
this function is used, wired LAN PCs can communicate with wireless LAN PCs.
BSS Basic Rate Set - Determines the rate at which data will be transmitted between devices on the network. The default BSS on the
AirStation will allow high transmission rates for 802.11g products while still accommodating the lower transmission rates of 802.11b
and 802.11 wireless clients.
Frame Bursting - Increase IEEE802.11g communication throughput by transferring packets continuously. However, the following
condition effects this function. The client wireless LAN adapter must support Frame Bursting feature too. When multiple wireless clients
use Frame Bursting feature, the throughput might not increase
802.11g Protection - When this function is enabled, the AirStation requests IEEE802.11b devices to stop communication for a while
prior to starting IEEE802.11g communication. If communication speed is decreased, this setting improves total throughput with existing
IEEE802.11g and IEEE802.11b standard devices,. The throughput decreases if only IEEE802.11g standard devices exists.
DTIM Period - A transmits beacon signals to nearby clients at a preset interval. This parameter sets the beacon transmission interval
time (1-255 sec.). Se lec tion of a larger number may conserve energy for the client PC (when client power management is enabled), but
may delay wireless communication. The default value of 1 is recommended.
Wireless Output Power - Adjust the power ouput power of the radio.

6
4.1.2 Wireless LAN Security
Broadcast SSID - This setting turns off SSID
broadcasting which makes the AirStation invisible to client
surveys. Clients will have to be manually confi gured to
connect to an AirStation with SSID broadcasting turned off.
The only options are to allow or deny connections for
these types of clients, thus, wireless networks requiring
security should mandate an encryption policy to preserve
security if SSID broadcasting is allowed.
Data Encryption - Select encryption type of wireless
data communication.
Disable - Disable data encryption.
WEP - Using WEP encryption. Encryption key should be
entered. When an encryption standard is implemented into
a wireless network, a WEP key is used between the client and access point to successfully encrypt, transmit and decrypt data. For this
reason, the same WEP key must be used for communication by the client and the access point with which it is attempting to establish
a connection session. An access point and client may both carry multiple WEP keys. It is necessary for not only the WEP keys to
match, but also the WEP key’s location or number. If a wireless client can not support multiple WEP keys, the AirStation’s must be
confi gured to transmit key number 1 for a connection to take place.
■ WEP Key Input Formats
64bit ASCII: 5 digits of alphanumeric characters, “ab34Y”
128bit ASCII: 13 digits of alphanumeric characters, “123456abcdef7”
64bit HEX: 10 digits, using characters 0-9 and a-f, “00234ABCDE”
128bit HEX: 26 digits, using characters 0-9 and a-f, “20123456789abcdeabcdeabcde”
TKIP - Using TKIP(Temporal Key Integrity Protocol) for data encryption.
AES - Using AES(Advanced Encryption Standard) for data encryption.
WPA-PSK - Authenticate with the AirStation using WPA-PSK (Pre-shared key), and then encrypt data using TKIP or AES. The
wireless client’s settings must use the same encryption method and key.Select “TKIP” or “AES” as the [Data Encryption].
■ WPA-PSK Input Formats
8 to 63 characters in ASCII or 64 digits hexadecimal key.
Example 1: [airstation-WPA-PSK]
Example 2: [0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef]
WPA Re-key interval - When TKIP or AES is selected, the encryption key is renewed at this interval. This interval is in seconds;
the range of acceptable values is 0-3600.
If 0 is entered, key is never renewed.
■ Note: The lower the rekey interval is, the more often a rekey happens. Setting this number low may slightly affect your
performance.
4.1.3 LAN Port
Set LAN interface parameters.
IP address - Allows ad min is tra tor to select whether AirStation is
assigned an IP address by a DHCP server or specify a static IP and
Subnet Mask for the LAN side of the AirStation.
■ Note: If the AP’s IP address is changed to a different range, the
setting PC’s IP must be changed to the same range to continue
confi guration. Then restart the setup session from the AirStation
utility screen.
Default Gateway - Allows administrator to use the Default
Gateway address (the AirStation’s IP address), assign a specifi c Gate-
way address, or block clients from Gateway notifi cation.
DNS (Name) server address - Allows administrator to use
the default DNS address (the AirStation’s IP address), assign specifi c
DNS addresses, or block clients from DNS address notifi cation.

7
4.1.4 Wireless LAN Computer Lim i ta tion
This option limits the PCs allowed a wireless connection to the AirStation. It is used to control the wireless connections to the AirStation.
Enforce MAC Filtering - Select Enable to restrict the connection and Disable for open access. Register your client PC’s MAC address before
selecting Set.
MAC address to be registered - MAC access restriction set up in LAN. Input the MAC addresses that to be allowed to communicate.
MAC address list - Display a table list of all MAC addresses.
4.1.5 Wireless Bridge (WDS)
Wireless Distribution System allows the wireless connection of access points to extend a wiredor wireless infrastructure to locations where cabling
is not possible or too expensive to implement.
Wireless Bridging (WDS) : Select Enable to allow WDS mode between AirStations or Disable to block communication between
AirStations.
WDS Dedicated Mode : Select Enable to disable wireless PCs from communicating with the AirStation.
■ Note: Both AirStations must support WDS to communicate with each other. WDS process must be repeated with other bridge access points.
Example: AP1 MAC Address is entered into AP2; AP2 MAC Address is entered into AP1;
Add a WDS Partner : Allows administrator to register the wireless MAC address of AirStations for (WDS) point-to-point or point-to
multipoint communication between AirStations. The MAC address to enter is found in the Management section, under System Information/Wireless
MAC address section. The WDS function must be set to Enable. The MAC address is 12 characters long.
Enter the Wireless MAC address in the form of two characters separated by a colon and click Apply. Up to six sets may be registered.
WDS Partners : Once settings have been added to the WDS confi guration screen, the MAC Address of associated Access Point(s) will be
displayed.

8
4.2 Network Setting
4.2.1 Routing Setup
Routing is the path data packets take between devices on the network.
A route is governed by the routing table, a copy of which exists on each network device.
If the device you are trying to communicate with does not exist on the network, the data packet is sent to the default gateway to look outside the
network for the device.
The Routing Information Protocol (RIP, also called RIP1) is used to exchange data between routers.
Similarly, if you allow the AirStation to receive RIP information, the AirStation’s routing table will incorporate the information it receives from the
other routers. RIP2 is an updated, extended version of RIP
RIP reception - This determines the type of RIP information to receive.
Select None, RIP1, RIP2 or both. Default setting is Both RIP1and RIP2.
Display Routing Table (Entries) - Allows administrator to delete routing information.
This displays the current manual additions to the routing table.
Click [Add Route] to enter new routing rule.
Add Routing Table Entry
• Destination Address - Network IP address and subnet mask.
• Gateway - Address through which the packet passes before it reaches the des ti na tion address.
• Metric - Number of bridges (1-15) to be passed before the packet reaches its destination.
RIP reception -
This determines the type of RIP information to receive.
Click Apply to confi rm settings.

9
4.2.2 Packet Filter - This feature limits confi gulation on the AirStation Bridge Base Station
Log Output - Activates the packet fi lter log.
Filter setting - Choose type from pull-down menu.
4.3 Management
(Network Diagnosis Settings)
4.3.1 System information - Displays System
Settings and information including wireless MAC Address
needed for WDS mode.
Display/delete packet filter information - The current
active filter rules are displayed, and rules shown here
may be deleted.
The ‘Delete marked rule’ button will delete any
rules marked, while the ‘Reset Packet Filter Rules to
Defaults’ resets all rules to the factory default settings.

10
4.3.2 Name and Password
AirStation Name - When using Client Manager and
multiple AirStations, select a unique name to make it easier
to identify each AirStation.
Administrator Name - “root”, cannot be changed
Administrator Password - Allows the administrator
to enter an administrator password to restrict access to the
setting screens. Enter new password. Enter up to eight alpha-
numeric characters (case sensitive) and confi rm password
If password is forgotten or misplaced, The WLA2-G54C can
be returned to all the factory default settings by holding
down the INIT button on the back of the unit for three
seconds.
4.3.3 Time setup
Local Time - Enter the current date and time, and click
Apply.
NTP Server- Select Enable or Disable.
■ Note: If NTP is used, time is set au to mat i cal ly.
NTP server IP - Enter the NTP server IP
Update Time - Enter the time interval for time check
frequency
Time Zone - Select local time zone
Click Set.
4.3.4 Packet Traffi c Information
Displays number of packets sent and received for wired and
wireless LAN traffi c.

11
4.3.5 PING Test
Destination - Enter IP address for test and click Start.
4.3.6 Log Information
Display Log Types - Select Error and/or Notice to
specify the types of reports to be logged by the AirStation.
Display Log Infomation - Select the specifi c reports to
be logged.
Log information - Displays recorded logs.
4.3.7 Syslog transmitting
Log Transfer - Select Enable or Disable
Syslog Server - Enter the IP address of the Syslog server.
Log Information Level - Select Error and/or Notify to
specify the types of reports to be sent to the Syslog server.
Log Information - Select the specifi c reports to be sent to
the Syslog server.
4.3.8 Save/Restore Settings
Save current setting to resume after losing or initializing setup
information.

12
4.3.9 Initialization/Reboot
Initialization sets all parameters back to factory defaults. After
initialization, the AirStation must be restarted.
4.3.10 Firmware Update
Firmware File Name - Enter the path and fi lename for
new fi rmware or select Browse to search for the path.
Click Firmware Update to load fi rmware to the
AirStation.
■ Note: Firmware update does not erase current user
settings.
4.3.11 AOSS
AOSS (AirStation One-Touch Secure System) - Display the clients that are connected to the AirStation by A.O.S.S.
• Name : Shows client’s name.
• MAC address : Shows client’s MAC address.
• Encryption type : Available encryption type of the client.
• Status : Shows current client’s connection.
• Operation : Connect/disconnect the clients.
■ Note: Once disconnect button is clicked, the client’s MAC
address is listed in MAC fi lter table.
■ Note: The maximum number of MAC fi ler table is 64.
Current encryption Information - Display encryption
level and security information.
• Security level :Current encryption level is displayed.
• SSID : Current SSID is displayed. Depending on encryption
level.
• Encryption key/pre-shared key : Current encryption data.
Depending on encryption level.
Encryption Type
Encryption level can be changed manually, when AOSS function
is activated.
Confi rm whether every clients can access before confi guring
this setting.
The following encryption levels can be selected.
(High security)AES - TKIP - WEP128 - WEP64(Low security)
Enable/disable AOSS button

13
AOSS
Enable/disable AOSS button.
• Enable : Enable A.O.S.S function.
• Disable : Disable A.O.S.S function.Exchange of AOSS. encryption keys can not be used until AOSS is enabled.
Start AOSS Sequence
Functions as an AOSS button on the AirStation unit.
The AirStation starts security key exchange, when the AOSS button is pushed.
The AOSS button is grayed out, when AOSS function is disabled.
Up to 24 clients are allow to connect to the AirStation by AOSS feature.
Stop AOSS
Clear AOSS configuration data.

14
USING AOSS
AOSS (AirStation One-Touch Secure System) is a simple, one-touch setup for connecting wireless clients to an access point while
setting up the most secure possible connection.
Users no longer need to worry about choosing the proper security protocols, IP addresses, or SSID’s. The intelligence of AOSS
determines the most optimal connection and confi gures itself in seconds.
■ NOTE: AOSS automatically creates a secure connection between your AOSS Access Point and client. You must have a Buffalo
AOSS enabled wireless client device to use the AOSS features of your AOSS Access Point/Router.
The INIT switch initiates AOSS mode now. If you want to restore the factory default settings, hold the INIT switch up to 5 seconds
when turn the unit on.
◗ Confi gure your WLA2-G54C’s network connection by referring to the above mentioned instructions.
◗ Once the WLA2-G54C has been confi gured, follow the directions to install your wireless client device and its drivers if necessary.
Certain wireless client adapters require client software to confi gure them. If your device has a Client Manager, then install it as
well.
■ NOTE: If the wireless client adapter is installed on a PC, then the AOSS client
manager will need to be installed as well. If your wireless client adapter is a standalone
device that does not require a PC, then just power up the device.
Standalone Devices: Ethernet Converters and Access Point Bridges
Client Manager Devices: CardBus, USB, and PCI Adapters.
Standalone
AOSS Device
Client Manager
Device
◗ Now that the WLA2-G54C and wireless client adapter are
installed, you can use AOSS to confi gure them.
◗ To begin the confi guration, press the AOSS button in the WLA2-
G54C’s confi guration. The AOSS menus can be found under the
‘Advanced’ Confi guration, Management, AOSS. The status screen
will briefl y show that it is in AOSS mode. The WLA2-G54C’s
Wireless Light may turn on and off.
■ NOTE: AOSS mode will stay active for a period of two
minutes. This is the time-slot required to initiate the wireless
client adapter.
◗ Refer to your wireless client adapter’s AOSS supplement to initiate the wireless client adapter’s AOSS mode.
◗ Once the client adapter has begun communicating with the AOSS router, AOSS client will report a successful AOSS connection.
This indicates that the AOSS process has begun and the two devices are confi guring themselves. Please refer to your wireless client
adapter’s supplement for the remainder of the setup.
ADDITIONAL AOSS INFORMATION:
◗ Only one AOSS wireless client adapter can be confi gured to the AOSS access point at a time. Thus, the button will need to be
repressed for each additional AOSS wireless client adapter that will be connected.
◗ It is not necessary to reconfi gure AOSS client devices that have already been confi gured via AOSS, unless signifi cant changes have
been made to the wireless network.
◗ Do not attempt to confi gure two separate AOSS networks at the same time, as it may cause undesired confi gurations.
◗ If an undesired client has connected via AOSS, it can be disconnected from within the WLA2-G54C’s advanced confi guration
AOSS menus.
ADDITIONAL INFORMATION
Please check the Buffalo Web site for the latest information and any corrections done for this manual.
For more information, please consult one of the following:
• The on-line help system of your AirStation wireless system - for in for ma tion about software and driver func tion al ity.
• The AirStation website at our local website indicated last page.
- for frequently asked questions (FAQ’s) and Software Updates.

15
Specifications
WLA2-G54C Physical Specifications
Dimensions (WxHxD) 56 x 120 x 92 mm
Weight: 0.56lbs (256g)
Temperature & Humidity
Operation 0 to 40 deg. C
Maximum humidity 80%
Transit/Storage 0 to 40 deg. C
Maximum humidity 80% (no condensation)
Power Characteristics
Transmit Mode 0.8A (Normal)
Power Supply 3.3V
Regulatory Information A
Wireless communication is often subject to local radio
regulations. Although AirStation wireless networking products
have been designed for operation in the license-free 2.4 GHz
band, local radio regulations may impose limitations on the use
of wireless communication equipment.
Networking Characteristics Compatibility
• IEEE 802.11 Standard for Wireless LANs (DSSS)
• Wi-Fi (Wireless Fidelity) certified by the Wi-Fi Alliance.
Host Operating System
Microsoft Windows® ME/98/NT4.0/2000/XP
Media Access Protocol
CSMA/CA (Collision Avoidance) with Acknowledgment (ACK)
Radio Characteristics (Typical Indoor Ranges)
R-F Frequency Band 2.4 GHz (2400-2483 MHz)
11 selectable sub-channels
Modulation Technique Direct Sequence Spread Spectrum
• CCK for High & Medium Transmit Rate
• DQPSK for Standard Transmit Rate
• DBPSK for Low Transmit Rate
Spreading 11-chip Barker Sequence
Bit Error Rate (BER) Better than 10 -5
Nominal Output Power 15 dBm (32mW)
Transmit Rate / Range
High Speed 54Mbps
Standard Speed 20 Mbps
Low Speed 1 Mbps
Open Office Environment
160 m (525 ft.)
270 m (885 ft.)
400 m (1300 ft.)
550 m (1750 ft.)Semi-Open Office Environment
50 m (165 ft.)
70 m (230 ft.)
90 m (300 ft.)
115 m (375 ft.)
Closed Office
25 m (80 ft.)
35 m (115 ft.)
40 m (130 ft.)
50 m (165 ft.)
Receiver Sensitivity -69dBm, -72dBm, -77dBm, -81dBm, -85dBm,
-88dBm -87dBm -90 dBm -92 dBm (depends on data rate)
Delay Spread (at FER of <1%) 65 ns 225 ns 400 ns 500 ns (depends
on data rate)
• The range of wireless devices can be affected by metal surfaces,
solid high-density materials and obstacles in the signal path.
• In Open Office environments, clients can “see” each other, i.e.
there are no physical obstructions between them.
• In Semi-open Office environments, work space is separated by
room dividers; client cards are at desktop level.
• In Closed Office environments, workspace is separated by
floor-to-ceiling brick walls.
NOTE:
The range values listed in Table “Radio Characteristics” are
typical distances as measured at Buffalo Technology AirStation
laboratories. These values are provided for your guidance but
may vary according to the actual radio conditions at the location
where the AirStation product is installed.
AirStation IEEE 802.11 Channel Sets
The range of the wireless signal is related to the Transmit Rate of
the wireless communication. Communications at a lower Transmit
range may travel longer distances.
Center Channel ID FCC
1 2412
2 2417
3 2422
4 2427
5 2432
6 2437
7 2442
8 2447
9 2452
10 2457
11 2462 1
1 default channel

16
provided by your LAN Administrator. Make changes if necessary,
and click OK.
5. When prompted, restart your computer.
B. 1.3 Other Problems
Please refer to our local web site indicated last page.
B Troubleshooting
B.1 Common Troubleshooting Tips B
Common Problems:
• Out of range, client cannot connect to the AirStation.
• Configuration mismatch, client cannot connect to the
AirStation.
• Absence or conflict with the Client Driver.
• Conflict of another device with the AirStation hardware.
B.1.1 LED Activity B
Monitoring LED activity helps identify problems.
- Power LED should be GREEN,
- Wireless LED should be GREEN if the line is active. If is it
blinking GREEN, wireless communication is active.
- Ethernet LED should be GREEN (100Mbps) or AMBER
(10Mbps) while the communication is active.
DIAG LED Activity
Unplug the power for three seconds. Plug the power back in to
monitor the DIAG LEDs during start-up.
Table B.1.1
DIAG LED Activity Table
DIAG LED Display
Action - Description/Cause
Red flash, 3 times
Starting:
A problem in the wired LAN side
Red flash, 4 times
Starting:
A problem in the wireless LAN side
B. 1.2 LEDs Work But Client PC Cannot Connect to Network
If the LEDs indicate that the network is working properly (Power
LED is on, Transmit/Receive LED blinks), check the TCP/IP settings
of the network.
Changing Client TCP/IP Settings in Windows
Consult the LAN Administrator for TCP/IP settings.
To add or change the TCP/IP Settings:
1. On the Windows task bar click Start.
2. Select Settings, then Control Panel.
3. Double-click on the Network icon to view the Network
Properties.
4. From the list of installed components, verify the TCP/IP ->
Buffalo WLI-USB-L11G wireless LAN adapter protocol (or
appropriate wireless LAN adapter) is installed.
• If this protocol is not yet installed, click the Add button and
select the TCP/IP protocol from the list. Refer to Windows Help
for more information.
• If this protocol is installed, select this protocol and click the
Properties button. Verify the parameters match the settings

17
Glossary
10BaseT or 100BaseTx: 802.3 based Ethernet network that uses
UTP (Unshielded twisted pair) cable and a star topology. 10 is
10 Mbps and 100 is 100 Mbps.
802.1x: The standard for wireless LAN authentication used
between an AP and a client. 802.1x with EAP will initiate key
handling.
Ad-Hoc Network: The wireless network based on a peer-to-peer
communications session. Also referred to as AdHoc.
Bandwidth: The transmission capacity of a computer or a
communication channel, stated in Megabits per second (Mbps).
BSS (Basic Service Set): An 802.11 networking framework that
includes an .
Bus Mastering: A system in which the specified Input/Output
device (e.g. NIC Card) can perform tasks without the intervention
of the CPU.
Client: A PC or workstation on a network.
Default Gateway: The IP Address of either the nearest bridge or
server for the LAN.
Default Parameter: Parameter set by the manufacturer.
Destination Address: The address portion of a packet that
identifies the intended recipient station.
DNS (Domain Name System): System used to map readable
machine names into IP addresses
Driver: Software that interfaces a computer with a specific
hardware device.
DSSS (Direct Sequence Spread Spectrum): Method of spreading
a wireless signal into wide frequency bandwidth.
DTE (Data Terminal Equipment): Device that controls data
flowing to and from a computer.
Dynamic IP Address: An IP address that is automatically assigned
to a client station in a TCP/IP network, typically by a DHCP
server.
ESS (Extended Service Set): A set of two or more BSSs that form
a single sub-network. SSID is user identification used in the ESS
LAN configuration.
Ethernet: The most widely used architecture for Local Area
Networks (LANs). It is a shared-media network architecture.
IEEE 802.3/802.3u standard details its functionality.
Ethernet cable: A wire similar to telephone cable that carries
signals between Ethernet devices.
File and Print Sharing: A Microsoft application that allows
computers on a network to share files and printers.
Firmware: Programming inserted into programmable read-
only memory, thus becoming a permanent part of a computing
device.
Full-Duplex: To transmit on the same channel in both directions
simultaneously.
Half-duplex: To transmit on the same channel in both directions,
one direction at a time.
Hub: A device which allows connection of computers and other
devices to form a LAN.
IEEE (Institute of Electrical and Electronics Engineers): The
professional organization which promotes development of
electronics technology.
IP (Internet Protocol) Address: A unique 32-binary-digit number
that identifies each sender or receiver of information sent in
packets.
Infrastructure: A wireless network or other small network
in which the wireless network devices are made a part of the
network through the .
ISP (Internet Service Provider): A company that provides access
to the Internet and other related services.
IV (Initialization Vector): The header section of a message
packet.
LAN (Local Area Network): A group of computers and peripheral
devices connected to share resources.
LED (Light Emitting Diode): The lights on a hardware device
representing the activity through the ports.
MAC (Medium Access Control) Address: A unique number that
distinguishes network cards.
Mbps (Mega Bits Per Second): A measurement of millions of
bits per second.
MHz (MegaHertz): One million cycles per second.
NAT (Network Address Translation): An internet standard that
enables a LAN to use one set of IP addresses for internal traffic
and a second set for external traffic.
NIC (Network Interface Card): An expansion card connected to
a computer so the computer can be connected to a network.
Packet: A block of data that is transferred as a single unit, also
called a frame or a block.
Packet Filtering: Discarding unwanted network traffic based on
its originating address or its type.
Ping (Packet Internet Groper): An Internet utility used to
determine whether a particular IP address is online.
Plug and Play: Hardware that, once installed (“plugged in”), can
immediately be used (“played”), as opposed to hardware that
requires manual configuration.
PoE (Power over Ethernet): A mechanism to send DC power to
a device using a CAT5 Ethernet cable.
Protocol: A standard way of exchanging information between
computers.
RADIUS (Remote Authentication Dial In User Service): A server
that issues authentication key to clients.
Repeater Hub: A device that collects, strengthens and transmits
information to all connected devices, allowing the network to be
extended to accommodate additional workstations.
RC4: The encryption algorithm that is used in WEP.

18
RJ-45 connector: An 8-pin connector used between a twisted
pair cable and a data transmission device.
Bridge: Device that can connect individual LANs and remote
sites to a server.
Roaming: The ability to use a wireless device while moving from
one to another without losing the connection.
SMTP (Simple Mail Transfer Protocol): The protocol used to
define and deliver electronic mail (e-mail) from one location to
another.
SNMP (Simple Network Management Protocol: An application
layer protocol that outlines the formal structure for communication
among network devices.
Static IP Address: A permanent IP address is assigned to a
node in a TCP/IP network. Also known as global IP.
Subnet Mask: An eight-byte address divided into 4 parts
separated by periods.
TCP/IP (Transmission Control Protocol/Internet Protocol:
Protocol used by computers when communicating across the
Internet or Intranet.
TKIP (Temporal Key Integrity Protocol): An encryption
method replacing WEP. TKIP uses random IV and frequent key
exchanges.
UDP (User Datagram Protocol): A communication method
(protocol) that offers a limited amount of service when
messages are exchanged between computers in a network.
UDP is used as an alternative to TCP/IP.
Static IP Address: A permanent IP address is assigned to a
node in a TCP/IP network. Also known as global IP.
Subnet Mask: An eight-byte address divided into 4 parts
separated by periods.
WAN (Wide Area Network): A networking system covering a
wide geographical area.
WEP (Wired Equivalent Privacy): An encryption method
based on 64 or 128bit algorithm.
Web Browser: A software program that allows viewing of web
pages.
Wi-Fi (Wireless Fidelity): An organization that tests and
assures interoperability among WLAN devices.
Wire Speed: The maximum speed at which a given packet
can be transferred using Ethernet and Fast Ethernet standard
specifications.
WLAN (Wireless LAN): A LAN topology using wireless
devices.
WPA (Wi-Fi Protected Access): An encryption method
replacing WEP.
VPN (Virtual Private Network): A security method to connect
remote LAN users to a corporate LAN system.
FCC/CE / R&TTE
Federal Communication Commission
Interference Statement
This equipment has been tested and found to comply with the limits
for a Class B digital device, pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses
and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will
not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined
by turning the equipment off and on, the user is encouraged to try to
correct the interference by one of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that
to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
FCC Caution: To assure continued compliance, (example - use only
shielded interface cables when connecting to computer or peripheral
devices). Any changes or modifications not expressly approved by the
party responsible for compliance could void the user’s authority to
operate this equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject
to the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
IMPORTANT NOTE:
FCC RF Radiation Exposure Statement:
This equipment complies with FCC RF radiation exposure limits set forth
for an uncontrolled environment. This equipment should be installed
and operated with a minimum distance of 20 centimeters between the
radiator and your body.
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 the DIRECTIVE
1999/5/EC OF THE EUROPEAN PARLIAMENT AND THE COUNCIL
of 9 March 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.
Europe – EU Declaration of Conformity
This device complies with the essential requirements of the R&TTE
Directive 1999/5/EC. The following test methods have been applied
in order to prove presumption of compliance with the R&TTE
Directive 1999/5/EC:
◗ EN 60950: 2000
Safety of Information Technology Equipment
◗ EN 300 328-2 V1.2.1 (2001-12)
Technical requirements for spread-spectrum radio equipment
◗ EN 301 489-17 V1.1.1 (2000-09)
EMC requirements for spread-spectrum radio equipment.

19
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 manual and of the
computer manufacturer must therefore be allowed at all times to
ensure the safe use of the equipment.
Intended use
This device is a 2.4 GHz wireless LAN transceiver, intended for
indoor home and office use in all EU and EFTA member states.
EU Countries intended for use
This device is intended for indoor Home and office use in the
following countries:
Austria, Belgium, Germany, Denmark, Spain, Greece, France, Finland,
Italy, Ireland, Luxembourg, The Netherlands, Portugal, Sweden, United
Kingdom, Cyprus, Czech Republic, Estonia, Hungry, Latvia, Lithuania,
Malta, Poland, Slovak Republic and Slovenia.
The device is also authorised for use in all EFTA member states
Iceland, Liechtenstein, Norway and Switzerland.
EU Countries Not intended for use
None.
Potential restrictive use
France: Only channels 10,11,12, and13
Potential restrictive use
This device is a 2.4 GHz wireless LAN transceiver, intended for
indoor home and office use in all EU and EFTA member states, except
in France, Belgium
and Italy where restrictive use applies.
In Italy the end-user should apply for a license at the national
spectrum authorities in order to obtain an authorization to use the
device for setting up outdoor radio links.
In Belgium there is a restriction in outdoor use. The frequency range
in which outdoor operation in Belgium is permitted is 2460 – 2483.5
MHz.
This device may not be used for setting up outdoor radio links in
France. For more information see http://www.anfr.fr/ and/or
http://www.art-telecom.fr
BUFFALO WARRANTY STATEMENT
Buffalo products come with a 2-year limited warranty from the date
of purchase.
Buffalo Technology warrants in good operating condition for the
warranty period. This warranty does not include non-Buffalo
Technology installed components. If the Buffalo product malfunctions
during the warranty period, Buffalo Technology will, at its discretion,
repair or replace the product at no charge, provided the product
has not been subjected to misuse, abuse or non-Buffalo Technology
authorized alterations, modifications or repairs. When returning a
product, include your original proof of purchase. Return requests
cannot be processed without proof of purchase. Shipment of returned
product to Buffalo Technology is the responsibility of the purchaser.
All expressed and implied warranties for the Buffalo product line
including, but not limited to, the warranties of merchantability and
fitness for a particular purpose, are limited in duration to the above
period.
Under no circumstances shall Buffalo Technology be liable in any way
to the user for damages, including any lost profits, lost savings or
other incidental or consequential damages arising out of the use of,
or inability to use, the Buffalo products.
Buffalo Technology reserves the right to revise or update its products,
software, or documentation without obligation to notify any individual
or entity.
Important Notice
Please have your proof of purchase receipt to get warranty support.
All defective products shall be returned with a copy of proof of
purchase.
In no event shall Buffalo Technology’s liability exceed the price
paid for the product from direct, indirect, special, incidental, or
consequential damages resulting from the use of the product, its
accompanying software, or its documentation. Buffalo Technology
does not offer refunds for any product.