FRITZ!Box 6840 LTE Service - Knowledge Base

FRITZ!Box 6840 LTE Service

Loud background noise when using a DECT repeater

As soon as a DECT Repeater is registered with the FRITZ!Box, you can hear loud background noise when conducting calls with a cordless telephone.


  • The DECT repeater is not properly connected or it was not positioned correctly.

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

1 Deregistering a repeater

  1. Click "DECT" in the FRITZ!Box user interface.
  2. Click "DECT Monitor" in the "DECT" menu.
  3. Click on the entry for a repeater.
  4. Click the (Delete) button.
  5. Delete all of the registered repeaters the same way.

2 Re-registering a repeater