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Knowledge document #522

FRITZ!Repeater reports "Wi-Fi transmission quality increased by reduced channel bandwidth"

The following message is displayed in the event log of the FRITZ!Repeater:

  • "Wi-Fi transmission quality increased by reduced channel bandwidth (2.4 GHz)"

Cause

  • In environments with many other 2.4 GHz Wi-Fi networks, the FRITZ!Repeater automatically reduces the channel bandwidth in the 2.4 GHz Wi-Fi network from 40 MHz to 20 MHz. By temporarily reducing the channel bandwidth, Wi-Fi connections in the 2.4 GHz Wi-Fi network are disturbed less and the user data rate of the connections is increased.

1 Optimizing the Wi-Fi settings

Configuring the FRITZ!Box

The following steps are only necessary if you are using a FRITZ!Box as the wireless router and you adjusted the Wi-Fi settings of the FRITZ!Box:

Note:In the factory settings, the FRITZ!Box already uses the ideal Wi-Fi settings, evaluates the Wi-Fi environment and the quality of the connection of the wireless devices connected to it at regular intervals, automatically selects the current ideal Wi-Fi channel settings, and steers wireless devices to whichever Wi-Fi network is best.

  1. Set up the FRITZ!Box as described in the guide Optimizing the Wi-Fi network of the FRITZ!Box.

Configuring the wireless router

The following steps are only necessary if you are using a wireless router from another manufacturer:

Note:Refer to the manufacturer of the wireless router for information on setting it up; for example, consult the manual.

  1. If the wireless router can provide the 2.4 GHz and the 5 GHz frequency bands at the same time:
    1. Enable the 2.4 GHz and the 5 GHz Wi-Fi networks on the wireless router:
    2. If the wireless router can automatically steer the wireless devices connected to it into the ideal frequency band ("band steering"), enable the corresponding option.
    3. If the wireless router has an option "Zero Wait DFS", "Always on DFS", or a similar option for uninterrupted use of the 5 GHz Wi-Fi network, enable it. This allows the wireless router's 5 GHz Wi-Fi network to be used even while the Wi-Fi environment is being checked for radar systems (for example for weather service, air traffic control, and the military).
  2. If possible, configure Wi-Fi channels without interference in both the 2.4 GHz and 5 GHz Wi-Fi network in the wireless router. If you can configure the wireless router so that it automatically selects the best Wi-Fi channel settings, enable this option.
  3. Configure the wireless router so that its Wi-Fi transmits at maximum power.
  4. Give the wireless router a unique Wi-Fi network name (SSID). This prevents your wireless devices from trying to connect to the wrong wireless router if there are Wi-Fi networks with the same name in the vicinity.

    Note:All Wi-Fi connections are cleared when you change the Wi-Fi network name. You must then reconfigure the Wi-Fi connections.

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