THOMSON Gateway Configuration Manual page 22

2.2 802.11a
Technical specifications
The 802.11a standard operates in the U-NII band and applies Orthogonal Frequency Division Multiplexing
(OFDM) as modulation technique. The data transfer rate 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. 802.11a allows 64 users per access point.
There is no compatibility with either 802.11b or 802.11g.
!
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.
U-NII band 802.11a channel allocation
The following table summarizes the 802.11a channels in the U-NII band. The assigned channels can differ
from country to country.
Channel Centre
Identifier Frequency
(GHz)
34 5.170
36 5.180
38 5.190
40 5.200
42 5.210
44 5.220
46 5.230
48 5.240
52 5.260
56 5.280
60 5.300
64 5.320
100 5.500
104 5.520
108 5.540
112 5.560
116 5.580
120 5.600
124 5.620
16
Regulatory Domain
America ETSI
- -
Y Y
- -
Y Y
- -
Y Y
- -
Y Y
Y Y
Y Y
Y Y
Y Y
- Y
- Y
- Y
- Y
- Y
- Y
- Y
802.11 Standards
Japan Taiwan
Y -
- -
Y -
- -
Y -
- -
Y -
- -
- Y
- Y
- Y
- Y
- -
- -
- -
- -
- -
- -
- -
E-DOC-CTC-20060609-0001 v2.0
Chapter 2
Singapore
-
Y
-
Y
-
Y
-
Y
-
-
-
-
-
-
-
-
-
-
-