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Frequency Ranges
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 access points) and po-
tential sources of interference (for instance video bridges, ba-
by monitors, microwave ovens). Should problems with inter-
ference 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
Ruling Out Interference Caused by
Other Wireless Networks from page 89
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.
In the 5-GHz frequency band, your FRITZ!Box occasionally
may change channels automatically due to DFS (Dynamic Fre-
quency Selection) if a “higher-privileged user” simultaneous-
ly claims the channel selected by the FRITZ!Box. This can hap-
pen especially when military or civilian radar is used in the
immediate vicinity. For more information, see the section
Avoid WLAN Channels with DFS on page 90
A prerequisite for use of the 5-GHz frequency band is that all
WLAN devices in the network support this frequency range in
accordance with the IEEE 802.11a or IEEE 8002.11n stan-
dard.
2.4 GHz or 5 GHz
The FRITZ!Box works in the wireless network either in the 2.4-
GHz range or in the 5-GHz range, but not parallel in both fre-
quency ranges at the same time.
