Operating Instructions and Installation Instructions

FRITZ!Box 3272 84
Wireless LAN—Getting Technical
Frequency Ranges
Wireless LAN uses the frequency ranges at 2.4 GHz and 5 GHz
as its transmission range.
With the FRITZ!Box you can establish wireless LAN connec-
tions in the 2.4-GHz range.
2.4-GHz frequency band
In the 2.4-GHz frequency band wireless LAN works in the
same range as Bluetooth, microwave devices and various
other devices like radio-controlled toys, garage-door openers
and video bridges. This means that interference may occur
within wireless networks operated in the vicinity of such de-
vices. Generally this has adverse effects on the transmission
rate, including aborted connections.
In the 2.4-GHz frequency range the European regulation au-
thorities have designated 13 channels for wireless LAN.
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).
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 wireless networks 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 between each two channels used. This means that if
channel 1 is selected for one wireless network, the
channels 6 through 13 can be selected for a second wireless
network. This maintains the minimum distance between
channels.
Should interference in a wireless network persist, the first
step should be to select a different channel.