AVM 3370 20002563 用户手册
产品代码
20002563
WLAN—Getting Technical
FRITZ!Box 3370
65
In the 2.4-GHz frequency range the European regulation au-
thorities have designated 13 channels for WLAN.
thorities have designated 13 channels for WLAN.
A channel can have a bandwidth of 20 MHz (throughput of up
to 216 Mbit/s) or 40 MHz (throughput of up to 450 Mbit/s).
to 216 Mbit/s) or 40 MHz (throughput of up to 450 Mbit/s).
Channels located directly next to each other in the 2.4-GHz
band may overlap and result in mutual interference. For in-
stance, if several WLANs are operated close to each other in
the 2.4-GHz frequency range with a bandwidth of 20 MHz, a
distance of at least five channels should be left empty be-
tween each two channels used. This means that if channel 1
is selected for one WLAN, the channels 6 through 13 can be
selected for a second WLAN. This maintains the minimum dis-
tance between channels.
band may overlap and result in mutual interference. For in-
stance, if several WLANs are operated close to each other in
the 2.4-GHz frequency range with a bandwidth of 20 MHz, a
distance of at least five channels should be left empty be-
tween each two channels used. This means that if channel 1
is selected for one WLAN, the channels 6 through 13 can be
selected for a second WLAN. This maintains the minimum dis-
tance between channels.
Should interference in a WLAN persist, the first step should
be to select a different channel.
be to select a different channel.
WLAN Autochannel
With the WLAN autochannel function, the FRITZ!Box automati-
cally searches for the channel subject to the least interfer-
ence. This process takes into consideration interference from
radio networks in the vicinity (WLAN base stations) and po-
tential sources of interference (for instance video bridges,
baby monitors, microwave ovens). Should problems with in-
terference persist despite this function, try to identify the
source of interference and switch it off manually.
cally searches for the channel subject to the least interfer-
ence. This process takes into consideration interference from
radio networks in the vicinity (WLAN base stations) and po-
tential sources of interference (for instance video bridges,
baby monitors, microwave ovens). Should problems with in-
terference persist despite this function, try to identify the
source of interference and switch it off manually.
Additional tips on interference in the WLAN radio network are
presented in the section
presented in the section
.
5-GHz Frequency Band
The FRITZ!Box can operate in the 5-GHz frequency band as an
alternative. This frequency range is used much less often
than the most common 2.4-GHz frequency range.
alternative. This frequency range is used much less often
than the most common 2.4-GHz frequency range.
In the 5-GHz frequency band the FRITZ!Box supports automat-
ic channel switching by DFS (Dynamic Frequency Selection).
DFS ensures that the channels from 52 to 140 are kept free
for higher-priority users, like weather radar systems. If you
are operating your FRITZ!Box in one of these channels, it
ic channel switching by DFS (Dynamic Frequency Selection).
DFS ensures that the channels from 52 to 140 are kept free
for higher-priority users, like weather radar systems. If you
are operating your FRITZ!Box in one of these channels, it