FRITZ!Box 3390
92
Wireless LAN—Getting Technical
Bandwidth
In both frequency ranges you can select between channel
bandwidths of 20 MHz or 40 MHz (exception: channel 140 in
the 5-GHz frequency band). The FRITZ!Box initially attempts
to select a channel with 40 MHz bandwidth. If this is not pos-
sible due to interference or channels already being used by
other wireless networks in the vicinity, the FRITZ!Box auto-
matically switches temporarily to a bandwidth of 20 MHz.
Greater bandwidth provides for higher data throughput:
Increasing bandwidths also increases the probability of inter-
ference by wireless networks in the vicinity. Large bandwidths
reduce the frequency range available to other wireless net-
works in the vicinity.
Allocation of the Wireless LAN Channels in the 2.4-GHz Range
Allocation of the Wireless LAN Channels in the 5-GHz Range
Bandwidth (MHz)
Maximum Data Throughput (Mbit/s)
20
216
40
450
Channel
Frequency (GHz)
Channel
Frequency (GHz)
1
2.412
8
2.447
2
2.417
9
2.452
3
2.422
10
2.457
4
2.427
11
2.462
5
2.432
12
2.467
6
2.437
13
2.472
7
2.442
Channel Frequency (GHz)
Channel
Frequency (GHz)
36
5.18
108
5.54
40
5.20
112
5.56
44
5.22
116
5.58
48
5.24
120
5.60
52
5.26
124
5.62
56
5.28
128
5.64
Summary of Contents for Fritz!Box 3390
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