Buffalo Technology AirStation WBR2-G54 User Manual

1.18 Mb


Additional Information

For more information, please consult:

The AirStation website at:

http://www.buffalotech.com - for frequently asked questions (FAQ’s) and Software Updates.


Physical Specifications

Dimensions W3 x H6.75 x D6.1in. (76 x 171 x 155mm)

Weight 1 lb. (620g)

Temperature & Humidity

Operation 0˚ to 40˚ C

Maximum humidity 80%

Transit/Storage 0˚ to 40˚ C maximum humidity 80% (no condensation)

Power Characteristics

Transmit Mode 1.1A (Nominal),

Power Supply 3.3 V



Regulatory Information

Wireless communication is often subject to local radio regulations. Although AirStation wireless networking products have been designed for operation in the license-free2.4 GHz band, local radio regulations may impose limitations on the use of wireless communication equipment.

Networking Characteristics


IEEE802.11g/b Standard for Wireless LANs

Wi-Fi(Wireless Fidelity) certified by theWi-FiAlliance.

Host Operating System

Microsoft Windows® 98SE/ME/NT4.0/2000/XP, Unix, Linux and MacOS Media Access Protocol

Wired - CSMD/CD (Collision Detection)

Wireless - CSMD/CA (Collision Avoidance) with Acknowledgment (ACK)

Radio Characteristics

RF Frequency Band 2.4 GHz (2400-2483MHz) 11 selectable channels (3non-overlapping)



Modulation Technique Direct Sequence Spread Spectrum

ODFM for High Transmit Rate

DQPSK for Standard Transmit Rate

DBPSK for Low Transmit Rate

Spreading 11-chipBarker Sequence Nominal Output Power 13.5 dBm Transmit Rate / Range

High Speed 54 Mbps

Medium Speed 36 Mbps

Standard Speed 2 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-OpenOffice 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 -83dBm-87dBm-91dBm-94dBm (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-densitymaterials and obstacles in the signal path.



Table “Radio Characteristics” lists the typical ranges when used indoors:

In Open Office environments, clients can “see” each other, i.e. there are no physical obstructions between them.

In Semi-openOffice environments, work space is separated by room dividers; client cards are at desktop level.

In Closed Office environments, workspace is separated by floor-to-ceilingbrick 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

11 default channel










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.

If any symptoms match section B.1.1, call the Buffalo Tech Support line 24 hours a day, 7 days a week at 866-752-6210 or emailinfo@buffalotech.com.



Table B.1.1 DIAG LED Activity Table

DIAG LED Display






Continuous Red


RAM Error Red flash, 2 times Starting Flash ROM







Red flash, 3 times


A problem in the wired LAN side




Red flash, 4 times


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-clickon the Network icon to view the Network Properties.

4.From the list of installed components, verify the TCP/IP => wireless LAN adapter protocol is installed.



If the wireless adapter 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 the wireless adapter protocol is installed, select the protocol and click the Properties button. Verify the parameters match the settings provided by your LAN Administrator. Make changes if necessary, and click OK.

5.When or if prompted, restart your computer.

B. 1.3 Other Problems

Please refer to www.buffalotech.com for further reference materials.



Troubleshooting WDS (Step-by-StepInstructions)

The most common issue with WDS installations is using the wrong MAC address. The proper MAC Address for the access points is the ‘Wireless MAC Address’. The best place to document this is under the ‘System Information’ section of the configuration web page. For proper setup, please continue reading this document.


Communication problems with WDS (wireless bridging/repeating).


WDS is a very complex bridging system, and it is not part of the 802.11b or 802.11g standard.


Please verify that the following conditions are met (if just one condition is not satisfied, then WDS cannot be used on the wireless network):

1. All wireless access points in the wireless bridge need to be from the same vendor (e.g. all Buffalo access points).

(At time of publication, the Apple Airport Extreme WILL work in WDS with Buffalo G54 access points.)

2. No single access point can communicate with more then six other access points in the wireless bridge.Good Practices:proper location.



The following is a list of good practices with WDS:

1.Start the wireless bridge system with only two access points and then add more access points.

2.Setup all access points in the wireless bridge in close proximity before they are deployed to their proper location.

3.Only one access point in the wireless bridge should be serving DHCP and routing services unless a routed wired network exists.

Proper Setup:

Please follow the following steps to properly setup WDS.

1. It is recommended that all access points in the bridge are reset to their factory default settings. This is done by holding the INIT button on the rear of the access point down for5-10seconds.

2. Login to the first access point in the wireless bridge (this should be the DHCP server enabled access point if there is not already a routed wired network).

3.Click on the ‘Advanced’ button.

4.The wireless settings page will appear. Select the proper settings for the wireless network. Record all settings on a piece of paper. All settings except for the ESS-IDneed to be identical amongst all access points in the bridge.

(If roaming is desired, then make sure the ESS-IDsettings need to be identical as well). Press the ‘Set’ button if any changes are made.

(If the IP address was changed, then reconnecting to the access point for configuration will require accessing it via its new IP address in a web browser (e.g. http://NEW_IP_ADDRESS).