FRITZ!DECT 440 Service - Knowledge Base

FRITZ!DECT 440 Service
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FRITZ!DECT smart button often loses its connection to the FRITZ!Box

The DECT connection between a FRITZ!DECT smart button, for example FRITZ!DECT 440, and the FRITZ!Box drops frequently. The connection status "Not connected" is displayed in the menu "(Home Network >) Smart Home" of the FRITZ!Box user interface.

Note:All instructions on configuration and settings given in this guide refer to the latest FRITZ!OS for the FRITZ!Box.

Simply proceed as described below. After each measure, check whether the problem is solved.

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

  1. Install the latest FRITZ!OS on the FRITZ!Box.

2 Updating the firmware of the FRITZ!DECT smart button

  1. Click "Home Network" in the FRITZ!Box user interface.
  2. Click "Mesh" in the "Home Network" menu.
  3. Click "Perform update" next to the respective device.

3 Checking the battery level

  1. Click "Home Network" or "Smart Home" in the FRITZ!Box user interface.
  2. Click "Smart Home" in the "Home Network" menu or click "Device Management" in the "Smart Home" menu.
  3. Click the button (Edit) for the respective device.
  4. Check the battery level.
  5. If a low battery message is displayed, replace the device's battery with a new one.

4 Turning off other base stations

  1. For testing purposes, turn off other base stations in the vicinity of the FRITZ!Box.
  2. If the problem no longer occurs, switch off the other base station or place it farther away from the FRITZ!Box.

5 Disabling "Reduce DECT field strength"

  1. Open the FRITZ!Box user interface.
  2. Click "Base Station" in the "DECT" menu or "DECT" in the "Telephony" menu.
  3. Disable the option "Reduce DECT field strength" in the section "Radio Field Strength".
  4. Click "Apply" to save the settings.

6 Removing USB 3.0 devices from the FRITZ!Box

If you are using a FRITZ!Box with USB 3.0 support and a USB 3.0 device is connected, the USB device may interfere with the DECT connection:

  1. For testing purposes, remove all of the USB 3.0 devices from the FRITZ!Box's USB ports.
  2. If the problem no longer occurs, a USB device was interfering with the Wi-Fi connection. Eliminate the interference caused by the USB device.
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