Operation Manual

Frequency Range
58 FRITZ!Box Fon WLAN – 6 Guidebook
Password Protection
Access to the FRITZ!Box Fon WLAN user interface can be pro-
tected by means of a password. When password protection
is enabled, the FRITZ!Box Fon WLAN settings are protected
from unauthorized access. Use unusual character strings as
passwords. Avoid birthdays or names.
WLAN Radio Network Name (SSID)
The factory settings of FRITZ!Box Fon WLAN include a value of
“FRITZ!Box Fon WLAN” preset for the SSID. Change the SSID
as soon as possible.
Frequency Range
WLAN uses the frequency range around 2.4 GHz in the ISM
band. WLAN thus works in the high-frequency range, like
Bluetooth. Microwave devices and cordless telephones use
this range as well. Thus interference can occur within WLANs
operated in the vicinity of such devices. Generally the only
adverse effects are to the transmission rate; aborted connec-
tions and data losses are rare.
In Europe, 13 channels are provided for WLAN in the 2.4 GHz
range. One channel has a bandwidth of 22 MHz. A 5MHz in-
terval is left empty between adjacent channels. That means
that channels located directly next to each other can overlap
and result in mutual interference. If several WLANs are oper-
ated within a small space, a distance of at least 5 channels
should be left empty between each two channels used. For
instance, if channel 1 is selected for one WLAN, the channels
7 through 13 can be selected for a second WLAN. This main-
tains the minimum distance between channels.