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Knowledge document #3326
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FRITZ!Fon restarts frequently

The FRITZ!Fon restarts frequently. The restarts occur, for example, when conducting calls, listening to messages on the answering machine, or playing music files from the FRITZ!Box media server.

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

1 Installing the latest software for your telephone

  1. Install the latest software on the telephone.

2 Resetting the telephone and re-registering all telephones

The problem may be caused by inconsistent settings in the FRITZ!Box or the FRITZ!Fon, for example due to repeatedly registering and deregistering the telephone or updating the software. Therefore, restore the FRITZ!Fon to factory settings and then re-register all of the cordless telephones using the wizard in the FRITZ!Box user interface:

Deleting telephones

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "Telephony Devices" in the "Telephony" menu.
  3. Click the (Delete) button to delete all of the registered telephones that are connected via "DECT".

Restoring the telephone to its factory settings

  1. Press the "Menu" key on the telephone.
  2. Scroll to "Settings" and press "OK".
  3. "Reset" > "OK" > "OK"

Switching telephones off

  1. Switch all of the cordless telephones off.

Restarting the FRITZ!Box

  1. Click "System" in the FRITZ!Box user interface.
  2. Click "Backup" in the "System" menu.
  3. Click on the "Restart" tab.
  4. Click the "Restart" button.

Re-registering all telephones

  1. Use the wizard to register all of the cordless telephones with the FRITZ!Box.