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Page 106 / 190 Scroll up to view Page 101 - 105
Testing the WLAN Connection Without Security Settings
106
4.
Select the “WLAN / Security” menu.
5.
Click the “Apply” button.
A window is displayed with the WLAN security set-
tings. Print out the page by clicking the “Print Page”
button.
6.
Remove the network cable and check the configura-
tion of the WLAN adapter in the printout. Try again to
establish a connection.
Testing the WLAN Connection Without Security
Settings
Disable the WLAN security settings to test whether a WLAN
connection between the FRITZ!Box and the WLAN adapter
is possible at all.
1.
Connect the FRITZ!Box to a computer using a network
cable. Proceed as described in the section “Connect-
ing Computers to the LAN Port” from page 15.
2.
Open the user interface in a web browser. Proceed as
described in the section “Opening the User Inter-
face” on page 26.
3.
In the “WLAN / Security” menu, select “non-encrypt-
ed”. As a final step, click “Apply”.
4.
Remove the network cable and try again to establish
a connection.
If the attempt to connect to the WLAN using the non-en-
crypted connection is not successful either, check the in-
stallation of the WLAN adapter and contact the manufac-
turer of the WLAN adapter if necessary.
Enable WLAN encryption again after completing the tests.
Follow the steps listed above and then enable the kind of
encryption that was previously configured.
This non-secured condition should be used only for
testing, to find out whether a WLAN connection is
possible at all.
Page 107 / 190
107
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 (“
st
reaming”), 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
Page 108 / 190
Avoiding WLAN Channels with DFS
108
interrupted as soon as you apply the changed settings. Af-
terward you have to reconnect your computer with the
FRITZ!Box.
1.
Connect the FRITZ!Box to a computer using a network
cable. Proceed as described in the section “Connect-
ing Computers to the LAN Port” on page 15.
2.
Start a web browser.
3.
Enter
fritz.box
in the address field.
4.
Open the “WLAN / Radio Channel” menu.
5.
After enabling the “Adjust radio channel settings”
option, select a different radio channel from the “Ra-
dio channel” list.
6.
Click the “Apply” button.
7.
Remove the network cable and check whether inter-
ference continues to occur.
Avoiding WLAN Channels with DFS
The FRITZ!Box loses the WLAN connection in the 5-GHz
frequency band for no apparent reason.
In the 5-GHz frequency area the access point is program-
med to change the channel whenever a radar source trans-
mits on the same channel (Dynamic Frequency Selection,
DFS).
A forced channel change can be avoided by selecting in
the FRITZ!Box a channel for the 5-GHz frequency band that
does not use DFS (channels 36, 40, 44, 48).
Possible Cause
Remedy
Page 109 / 190
109
Obtaining an IP Address Automatically
10.4
Obtaining an IP Address Automatically
The FRITZ!Box has its own DHCP server, which assigns IP
addresses to the connected computers. The connected
computers must be configured such that they can receive
their IP addresses automatically. The steps for checking
and adjusting this option differ among the operating sys-
tems. See the relevant section for your operating system.
Obtaining an IP Address Automatically in Windows 7
1.
Click the “Start” button in the task bar and select
the
“Control Panel / Network and Internet”.
2.
Under “Network and Sharing Center”, click “View net-
work status and tasks”.
3.
From the left column, select the “Change adapter set-
tings” command.
4.
Select the LAN connection between your computer
and the FRITZ!Box. Click the right mouse button and
select “Properties”.
5.
Under “This connection uses the following items”,
select the “Internet Protocol Version 4 (TCP/IPv4)”
entry and click the “Properties” button.
6.
On the “General” tab, enable the options “Obtain an
IP address automatically” and “Obtain DNS server
address automatically”.
If FRITZ!Box is operated in a network, no other DHCP serv-
er may be activated in this network.
Page 110 / 190
Obtaining an IP Address Automatically in Windows 7
110
Properties of the Internet protocol (TCP/IP)
7.
Confirm your selection by clicking “OK”.
Repeat steps 5 through 7 for the “Internet Protocol
Version 6 (TCP/IPv6)” as well.
The computer now receives an IP address from the
FRITZ!Box.

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