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Wireless Zero Configuration Service
(Windows XP)
Windows XP offers the Wireless Zero Configuration Service to support 802.11b and
802.11g wireless networking.This service automatically polls the area for available
wireless access points.If an available wireless access point is found,Windows attempts to
connect to the access point.If no available wireless access points are found,you must
manually add the access points.
Note:The Wireless Zero Configuration Service and Client Manager do not function
properly together.If you want to use Client Manager,you must disable the Wireless Zero
Configuration Service.
Enabling the Wireless Zero Configuration Service
Select Start»Control Panel»Administrative Tools»Services to open the Services window.
Select Automatic in the Startup Type field of Wireless Zero Configuration Service to
enable the Wireless Zero Configuration Service.
Note:The default Startup Type value of Wireless Zero Configuration Service is
Automatic.
Disabling the Wireless Zero Configuration Service
Select Start»Control Panel»Administrative Tools»Services to open the Services window.
Select Disabled in the Startup Type field of Wireless Zero Configuration Service to
disable the Wireless Zero Configuration Service.
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
External Antenna Connector
MC Card
Specifications
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 802.11g Standard for Wireless LANs (DSSS)
• Wi-Fi (Wireless Fidelity) certified by the Wi-Fi
Alliance.
Host Operating System
Microsoft Windows(r) 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
• ODFM for High Transmit Rate
• CCK for 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.)