THOMSON Gateway - 802.11 g Standard Specifications

E-DOC-CTC-20060609-0001 v2.0
Chapter 2
802.11 Standards
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2.4 802.11g
Technical specifications
The 802.11g standard operates in the 2.4 GHz band and applies OFDM (Orthogonal Frequency Division
Multiplexing) with CCK (Complementary Code Keying) or optionally PBCC (Packet Binary Convolutional
Coding) as modulation technique. The data transfer can be up to 54 Mbps, but will be scaled back to 48, 36,
24, 18, 12, 9 or 6 Mbps (this is known as Adaptive Rate Selection), when the signal quality becomes an issue.
802.11b allows 64 users per access point.
802.11g is backward compatible with 802.11b.
ISM band 802.11g channel allocation
The following table summarizes the 802.11g 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
Regulatory Domain
America EMEA Israel Japan
CCK OFDM CCK OFDM CCK OFDM CCK OFDM
1YYYY--YY
2 Y Y Y Y - - Y Y
3YYYY--YY
4 Y Y Y Y - - Y Y
5 YYYYYYYY
6 Y Y Y Y Y Y Y Y
7 YYYYYYYY
8 Y Y Y Y Y Y Y Y
9YYYY--YY
10 Y Y Y Y - - Y Y
11 YYYY - - YY
12 - - Y Y - - Y Y
13 - - Y Y - - Y Y
14 - - - - - - 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.