FRITZ!Box 7430 Service - Knowledge Base

FRITZ!Box 7430 Service

Slow wireless connections according to 802.11n

The throughput of wireless connections (WiFi) according to the wireless standard 802.11n is lower than the data rate supported by the wireless standard.

Note:The configuration procedure and notes on functions given in this guide refer to the latest FRITZ!OS for your FRITZ!Box.

Simply proceed as described below. After each measure, check whether the issue persists.

1 Checking the event log of the FRITZ!Box

  1. Click "System" in the FRITZ!Box user interface.
  2. Click "Event Log" in the "System" menu.
  3. Select "Wireless" from the drop-down list.
  4. Check whether the message "Wireless LAN transmission quality increased by reduced channel bandwidth [...]" is displayed.

2 Disabling Bluetooth for testing purposes

Bluetooth influences the wireless speed in the 2.4 GHz frequency band; this is especially noticeable when using real-time applications such as video streaming:

  • Disable Bluetooth on the network device (for example smartphone, tablet).

3 Enabling or refreshing the auto channel

If the auto channel is enabled, the FRITZ!Box checks the wireless LAN location and automatically selects the optimum wireless channel settings. However, the allocation of the frequency bands can change significantly over the course of the day. The FRITZ!Box does not refresh the auto channel as long as wireless devices are still connected with it. You can therefore manually refresh the auto channel at any time:

Note:All wireless connections to the FRITZ!Box are cleared and then automatically re-established when you enable or refresh the auto channel.

  1. Click "Wireless" ("WLAN") in the FRITZ!Box user interface.
  2. Click "Radio Channel" in the "Wireless" ("WLAN") menu.
  3. Enable the option "Set radio channel settings automatically (recommended)".
  4. Click "Apply" to save the settings.
  5. Click the "Refresh Autochannel" button.

4 Configuring the wireless device to use 40 MHz channels

The maximum data rate can only be achieved with wireless connections according to 802.11n if the wireless device uses channels with a bandwidth of 40 MHz. If the bandwidth is only 20 MHz, then a maximum of 195 Mbit/s can be achieved.

Perform the following step if the computer's wireless network adapter or the wireless device supports wireless channels with bandwidths of 40 MHz:

Note:You can find information on configuring the device in its manual, or consult its manufacturer directly.

  • Configure the wireless network adapter or the wireless device so that it uses wireless channels with bandwidths of 40 MHz.

    Example:
    You can configure many Intel wireless network adapters for channels with bandwidths of 40 MHz. In order to do so, call up the properties of the wireless network adapter in the Windows Device Manager and select "auto" for "802.11n Channel Width for band 2.4":

5 Installing the latest FRITZ!OS for the FRITZ!Box

6 Installing the latest software for the wireless device

  • Install the latest driver for your computer's wireless network adapter or the latest operating system (for example Android, iOS) for the wireless device.

    Note:You can find information on updating the wireless network adapter or wireless device in its manual, or consult the manufacturer directly.
    You can find the latest drivers for the FRITZ!WLAN Sticks in our download area.

7 Setting the maximum transmitter power

  1. Click "Wireless" ("WLAN") in the FRITZ!Box user interface.
  2. Click "Radio Channel" in the "Wireless" ("WLAN") menu.
  3. Check which wireless channel setting is enabled.
    • If the option "Set radio channel settings automatically (recommended)" is enabled:
      • Proceed with the following section.
    • If the option "Adjust radio channel settings" is enabled:
      1. Click "Additional settings".
      2. Select "100%" from the drop-down list "Maximum transmitter power".
      3. Click "Apply" to save your settings.

8 Enabling WPA2 encryption

The maximum data rate can only be reached when the wireless connection is encrypted with WPA2 according to 802.11n. If a different encryption method is used, then the maximum data rate is always 54 Mbit/s.

WPA2 encryption is already enabled in the FRITZ!Box's factory settings. If you changed the FRITZ!Box's wireless settings, enable WPA2 encryption and establish the wireless connection using this encryption method:

  1. Click "Wireless" ("WLAN") in the FRITZ!Box user interface.
  2. Click "Security" in the "Wireless" ("WLAN") menu.
  3. Enable WPA encryption.
  4. Select "WPA + WPA2" for the "WPA mode".
  5. Enter a network key in the "Network key" field.

    Important:To ensure optimal security, the password should be at least 20 characters long and contain capital and lower-case letters (but not letters such as ä, ë, ö, ü, é, í), digits, and other characters.

  6. Click "Apply" to save the settings.
  7. Print out the wireless security settings or make note of them.
  8. Establish the wireless connection using the security settings you made note of.

9 Finding the ideal location for wireless devices

  • If possible, position the FRITZ!Box in a room that is centrally located.
  • Do not position the FRITZ!Box directly in the corner of a room.
  • Position the FRITZ!Box so that it is as unobstructed as possible, i.e. not directly in back of or under an obstacle such as pieces of furniture or a heater.
  • Position the FRITZ!Box as high in the room as possible, for example on a shelf.
  • Position the FRITZ!Box so that there are as few obstacles as possible between it and the other wireless devices. In particular, metallic objects or objects containing water (for example a refrigerator, houseplants) significantly reduce the quality of the wireless signal.
  • Position the FRITZ!Box so that it is away from other transmitters (for example microwaves, baby monitors, wireless speakers, Bluetooth devices).
  • For testing purposes, position the FRITZ!Box and the wireless device as close as possible.

    Note:Once you have ruled out all other sources of error, you can increase the distance between the two devices again.

10 Identifying sources of interference

  1. Turn off all devices that could interfere with the wireless network, one after the other.

    Note:All devices that emit radio waves are possible sources of interference. These include other wireless devices, wireless speakers, Bluetooth devices, baby monitors or microwaves, for example.

  2. After you have turned off a device, check whether the wireless connection is still impaired.

Once you have identified a device that causes interference, you can either leave it turned off or try to avoid the interference by setting the channel manually.

Now the FRITZ!Box and the wireless device are ideally configured. You will now achieve the greatest possible wireless range as well as the highest throughput between your wireless devices and the FRITZ!Box.

Note:If the previous measures did not succeed in sufficiently increasing the quality of your wireless connection, you can use a FRITZ!WLAN Repeater to extend the range of the wireless network and increase the throughput of your wireless connection.