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11 selectable channels (3 non-overlapping)
Modulation Technique Direct Sequence Spread Spectrum
• ODFM for High Transmit Rate
• DQPSK for Standard Transmit Rate
• DBPSK for Low Transmit Rate
Spreading 11-chip Barker Sequence
Nominal Output Power: 19dBm (802.11b), 16dBm (802.11g)
• High Speed 54 Mbps (125 Mbps in 125* High Speed Mode)
• Medium Speed 36 Mbps (96 Mbps in 125* High Speed Mode)
• Standard Speed 2 Mbps
• Low Speed 1 Mbps
Open Ofﬁ ce Environment
160 m (525 ft.)
270 m (885 ft.)
400 m (1300 ft.)
550 m (1750 ft.)
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Semi-Open Ofﬁ ce Environment
50 m (165 ft.)
70 m (230 ft.)
90 m (300 ft.)
115 m (375 ft.)
Closed Ofﬁ ce
25 m (80 ft.)
35 m (115 ft.)
40 m (130 ft.)
50 m (165 ft.)
Receiver Sensitivity -83 dBm -87 dBm -91 dBm -94 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.
Table “Radio Characteristics” lists the typical ranges when used indoors:
• In Open Ofﬁ ce environments, clients can “see” each other, i.e. there are no physical
obstructions between them.
• In Semi-open Ofﬁ ce environments, work space is separated by room dividers; client
cards are at desktop level.
• In Closed Ofﬁ ce environments, workspace is separated by ﬂ oor-to-ceiling brick walls.
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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
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• Out of range, client cannot connect to the AirStation.
• Conﬁ guration mismatch, client cannot connect to the AirStation.
• Absence or conﬂ ict with the Client Driver.
• Conﬂ ict of another device with the AirStation hardware.
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
• The Red Diag LED will ﬂ ash during boot and ﬁ rmware updates.
DIAG LED Activity
Unplug the power for three seconds. Plug the power back in to monitor the Diag LEDs
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DIAG LED Activity Table
DIAG LED Display Time Description/Action
Continuous Red Starting RAM Error Red ﬂ ash, 2 times Starting Flash
Red ﬂ ash, 3 times Starting A problem on the wired LAN side
Red ﬂ ash, 4 times Starting A problem on the wireless LAN side
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 correct TCP/IP settings.
To add or change 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 Network Properties.
4. From the list of installed components, verify the TCP/IP => wireless LAN adapter
protocol is installed.