FRITZ WLAN-7390 Router Manual PDF (Setup & Configuration Guide)

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Installing the Current Service Pack

111

2.

Open the user interface in a web browser. Proceed as

described in the section “Opening the User Inter-

face” on page 28.

3.

Go to the “WLAN / Security” menu and select “non-

enctypted”. 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.

Installing the Current Service Pack

The WLAN connection to the FRITZ!Box cannot be

established 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.

This non-secured condition should be used only for

testing, to find out whether a WLAN connection is

possible at all.

Possible Cause

Remedy

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112

Changing the WLAN Connection of a FRITZ!WLAN USB Stick in FRITZ!WLAN

Changing the WLAN Connection of a FRITZ!WLAN USB

Stick in FRITZ!WLAN

Using a FRITZ!WLAN USB Stick and AVM Stick & Surf

technology, a computer was connected with a FRITZ!Box

that can manage two wireless networks (2.4 and 5 GHz) at

the same time. However, the wireless connection was not

established in the desired frequency range (5 GHz, for

instance), but in the alternative frequency range

(2.4 GHz, for instance).

Upon delivery the FRITZ!Box Fon WLAN 7390 is preset to

use the same wireless network name (SSID) and network

key for both wireless networks. The FRITZ!WLAN USB Stick

then always connects with the first wireless network that

matches the security settings. If you have assigned differ-

ent SSIDs to the two wireless networks in your FRITZ!Box,

WLAN connections will be always be established via

Stick & Surf in the 2.4-GHz frequency range.

Proceed as follows to set the desired wireless network

manually:

1.

Open the control software of your FRITZ!WLAN USB

Stick by double-clicking the program icon

in the

notification area of the taskbar.

2.

Click the “Find” button, select the desired wireless

network from the list of accessible remote sites and

then click “Apply”.

3.

In the “Remote Site” window, enter the settings of

the wireless network and confirm your entries with

“OK”.

The desired WLAN connection will be established.

Possible Cause

Remedy

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Ruling Out Interference Caused by Other Wireless Networks

113

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 “Auto”. 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 instructions below. In

this case, note that the existing WLAN connection must be

interrupted and then established again if you change the

radio channel in the frequency band currently in use. If

your WLAN adapter can also work in both the 2.4-GHz and

5-GHz frequency bands, you can skip this step by estab-

lishing a wireless network between the computer and the

FRITZ!Box in the other frequency band before changing

this setting.

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 16.

2.

Start a web browser.

3.

Enter

fritz.box

in the address field.

Page 114 / 197

114

Avoiding WLAN Channels with DFS

4.

Enable the expert settings of the FRITZ!Box in the

“System / Expert Mode” menu. Confirm by clicking

“Apply”.

5.

Select the “WLAN / Radio Channel” menu and then

choose the frequency band whose channel settings

you would like to change.

6.

Select a different radio channel from the “Adjust ra-

dio channel settings” list.

7.

Click the “Apply” button.

8.

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 pro-

grammed to change the channel whenever a radar source

transmits on the same channel (Dynamic Frequency Selec-

tion, 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 115 / 197

Obtaining an IP Address Automatically

115

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 on “View

network status and tasks”.

3.

From the left column, select the “Change adapter

settings” 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 “Properties”.

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.

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