Operating Instructions and Installation Instructions

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Installing the Current Service Pack
Installing the Current Service Pack
The WLAN connection to the FRITZ!Box cannot be estab-
lished using the Microsoft WLAN Service (WZC) 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 Ser-
vice will support WPA2, so that a WLAN connection can be
established to the FRITZ!Box.
Ruling Out Interference Caused by Other Wireless
Networks
If there are other devices in the immediate vicinity of your
FRITZ!Box that use the same frequency band, simultane-
ous use of frequencies can result in mutual interference
(for example, fluctuations or interrupted connections).
Disruptions can be caused by other WLAN access points,
but also by devices like baby monitors, game consoles,
garage door openers, Bluetooth devices, or wireless AV
bridges, which also use the 2.4-GHz frequency band. In
this case, please test a different radio channel for your
FRITZ!Box.
Alternatively, you can set the radio channel to “Autochan-
nel”. This enables the autochannel function, so that the
FRITZ!Box searches for the best WLAN channel itself.
For applications that rely on a steady, high throughput
rate (“streaming”), you should use the 5-GHz frequency
band. This radio band provides more channels and is sub-
ject to significantly less external interference.
To set the radio channel in the user interface, your com-
puter must be connected with the FRITZ!Box by network
cable or wirelessly. If your computer is connected via
WLAN, continue with Step 2 of the below instructions. In
this case, note that the existing WLAN connections is
Possible Cause
Remedy