E-DOC-CTC-20060609-0001 v2.0
Chapter 2
802.11 Standards
19
2.3 802.11b
Technical specifications
The 802.1b standard operates in the 2.4 GHz band and applies HR-DSSS with Complementary Code Keying
(CCK), or optionally Packet Binary Convolutional Coding (PBCC) as modulation technique. The data transfer
rate can be up to 11 Mbps, but will be scaled back to 5.5, 2 or 1 Mbps when the signal quality becomes an
issue. 802.11b allows 32 users per access point.
802.11b is backward compatible with 802.11 legacy.
ISM band 802.11b channel allocation
The following table summarizes the 802.11b channels in the 2.4 GHz ISM band. The assigned channels can
differ from country to country.
!
The regulatory information in this section is given for information only. This information is subject
to change by the regulatory bodies. The FCC is the regulatory body in the U.S., the ETSI is the
regulatory body in Europe.
Channel
Identifier
Centre
Frequency
(GHz)
Regulatory Domain
America EMEA
1
1. EMEA: stands for Europe, Middle East and Africa.
Japan Israel China
12.412Y Y Y - Y
2 2.417 Y Y Y - Y
32.422Y Y Y - Y
4 2.427 Y Y Y - Y
52.432Y Y Y Y Y
6 2.437 Y Y Y Y Y
72.442Y Y Y Y Y
8 2.447 Y Y Y Y Y
92.452Y Y Y - Y
10 2.457 Y Y Y - Y
11 2.462 Y Y Y - Y
12 2.467 - Y Y - -
13 2.472 - Y Y - -
14 2.484 - - Y - -
i
Users are responsible for ensuring that the channel set configuration is in compliance with the
regulatory standards of the country in which they are residing.
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