Cannot Establish a WLAN Connection
91
If the attempt to connect to the WLAN using the non-encrypt-
ed connection is not successful either, check the installation
of the WLAN device and contact the manufacturer of the
WLAN device if necessary.
Enable WLAN encryption again after completing the tests.
Follow the steps listed above and then enable the kind of en-
cryption that was previously configured.
Installing the Current Service Pack
The WLAN connection to the FRITZ!Box cannot be established
using the Microsoft WLAN Service (WZC: Windows Zero
Configuration) in Windows XP with Service Pack 2.
The required Microsoft patch for WPA2 (IEEE 802.11i) may not
be not installed.
Install Service Pack 3 (SP3) for Windows XP, available as a
free download from Microsoft. Then Microsoft WLAN Service
will support WPA2, so that a WLAN connection can be
established to the FRITZ!Box.
Avoiding WLAN Channels with DFS
The FRITZ!Box loses the WLAN connection in the 5-GHz
frequency band for no apparent reason.
A forced channel change is taking place. In the 5-GHz fre-
quency band the WLAN base station is programmed to
change the channel whenever a radar source transmits on the
same channel (Dynamic Frequency Selection, DFS).
You can prevent forced channel changes by selecting in the
FRITZ!Box a channel for the 5-GHz frequency band that does
not use DFS (channels 36, 40, 44, 48).
Cause
Help
Cause
Help
FRITZ!Box 3270-en.fm Seite 91 Mittwoch, 14. März 2012 2:44 14
