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

Page 141 / 197 Scroll up to view Page 136 - 140

Frequency Ranges

141

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 these

channels do not overlap, as well as experiencing signifi-

cantly less external interference.

For applications that require a low to normal throughput

rate (for instance, reading and writing e-mail), use the 2.4-

GHz frequency band.

Bandwidth

In both frequency ranges you can select between channel

bandwidths of 20 MHz or 40 MHz (exception: channel 140

in the 5-GHz frequency band). The FRITZ!Box initially at-

tempts to select a channel with 40 MHz bandwidth

(throughput up to 300 Mbit/s). If this is not possible due

to interference or channels already being used by other

WLANs in the vicinity, the FRITZ!Box automatically switch-

es temporarily to a channel with 20 MHz bandwidth.

Greater bandwidth provides for higher data throughput:

Increasing bandwidths also increases the probability of

interference by wireless networks in the vicinity. Large

bandwidths reduce the frequency range available to other

wireless networks in the vicinity.

Bandwidth (MHz)

Maximum Data Throughput (Mbit/s)

20

130

40

300

Page 142 / 197

142

Frequency Ranges

Allocation of the WLAN Channels in the 2.4-GHz Range

Allocation of the WLAN Channels in the 5-GHz Range

Channel

Frequency (GHz)

Channel

Frequency (GHz)

1

2.412

8

2.447

2

2.417

9

2.452

3

2.422

10

2.457

4

2.427

11

2.462

5

2.432

12

2.467

6

2.437

13

2.472

7

2.442

Channel

Frequency (GHz)

Channel

Frequency (GHz)

36

5.18

108

5.54

40

5.20

112

5.56

44

5.22

116

5.58

48

5.24

120

5.60

52

5.26

124

5.62

56

5.28

128

5.64

60

5.30

132

5.66

64

5.32

136

5.68

100

5.50

140

5.70 (20 MHz band-

width only)

104

5.52

Page 143 / 197

Increasing the WLAN Range

143

2.4

Increasing the WLAN Range

The range of a WLAN radio network also always depends

on external influences. The following factors have an es-

pecially strong influence on the distance over which your

FRITZ!Box can establish a stable, high-throughput wire-

less connection:

•

the WLAN adapter used

•

structural conditions at your location

•

the number of devices operating near the access

point in the same frequency range.

You can extend the range in your wireless network yourself

as needed. To do so you will need supplementary equip-

ment not included in your FRITZ!Box package: You can ei-

ther use a WLAN repeater, for instance the FRITZ!WLAN Re-

peater by AVM, or use an additional WLAN access point

working in repeater mode to set up a wireless distribution

system. Both options are described in greater detail be-

low.

Using the FRITZ!WLAN Repeater N/G

To increase the WLAN range, especially under difficult or

strongly-shielding structural conditions, the FRITZ!WLAN

Repeater N/G, available as an accessory from AVM, can be

used in combination with the FRITZ!Box. It supports all

common WLAN standards, is especially easy to install and

can be operated at any 230-V power outlet.

For more information on the FRITZ!WLAN Repeater N/G, go

to the following web address:

www.avm.de/en/Produkte/FRITZ_WLAN/FRITZ_WLAN_

Repeater_N_G

Setting up a WDS

To extend the range in your wireless network using WDS

(Wireless Distribution System), you will need a WLAN ac-

cess point in addition to the FRITZ!Box. One of the two

WLAN access points works as the WDS base station, the

Page 144 / 197

144

Setting up a WDS

other as a WDS repeater. The WDS base station and WDS

repeater are connected to each other via WLAN. The WDS

base station then can use the WDS repeater to reach even

computers that would be located beyond its range without

the WDS repeater.

WDS: Expanding the WLAN range using a repeater

Note the following for WDS configuration:

•

In order to expand the range of your wireless net-

work, you need at least one additional WLAN access

point. The wireless network of your FRITZ!Box can be

expanded to a WDS (Wireless Distribution System)

with up to three WLAN access points.

•

All WLAN access points implemented in the WDS

must support WDS and be configured for this tech-

nology.

•

All WLAN access points implemented as repeaters in

the WDS must be located within the radio range of

the WDS base station.

•

The FRITZ!Box can function as a WDS base station to

establish the Internet connection for other WDS re-

peaters, or as a WDS repeater to expand the range of

a WDS base station.

•

Make sure that the WDS connections between the

WDS base station and the WDS repeaters are secured

using the same encryption (for instance,

WPA/WPA2). Note that the WPA2 encryption method

is available only when your network consists of AVM

devices, since only WEP encryption has been speci-

fied for WDS connections among all manufacturers.

FRITZ!Box (Base station)

Repeater

Power

supply

Power

supply

DSL

Page 145 / 197

Setting up a WDS

145

•

Make sure that all WLAN access points in the WDS

use the same radio channel.

•

Every access point participating in the WDS fulfills

the tasks of a WLAN access point for its given WLAN

clients. This means that the WLAN clients see each

WLAN access point with an individual name (SSID)

and individual encryption settings.

If you use the WLAN control software provided in

Windows 7, Windows Vista or by the Windows XP Ser-

vice Pack 2 on your WLAN clients, you can assign the

same SSID and the same encryption settings to dif-

ferent WLAN access points. Each client can then au-

tomatically register at the WLAN access point with

the best availability.

•

Make sure that each IP address is assigned only once

in the wireless network.

Configuring FRITZ!Box as a Base Station

WDS Base Station

As a

WDS base station

, the FRITZ!Box establishes Internet

connections for other WLAN repeaters and WLAN clients.

For instructions on how to set up the FRITZ!Box as a WDS

repeater, start reading from page 146.

To set up the FRITZ!Box as a WDS base station, proceed

according to the following directions:

1.

Start a web browser.

2.

Enter

fritz.box

in the address field.

The FRITZ!Box user interface opens.

3.

Make sure that the expert mode is enabled in the

“System / Expert Mode” menu and click “Apply”.

4.

Open “WLAN / WDS” and make sure the “Autochan-

nel” function is not selected by following the instruc-

tions on the screen.

5.

Check the checkbox in front of the “WDS enabled”

option.

6.

Select “Base station” as the operating mode.

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