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Answering machine does not record any messages

Although the "Record messages" mode is enabled for the FRITZ!Box's answering machine, the answering machine does not record any messages. Callers cannot leave any messages and hear the greeting "Hello. No one is available to answer your call at the moment. Please call again later", for example. The message "TAM memory full!" is displayed on the FRITZ!Fon.


  • Either no more memory is available or the maximum number of messages has been reached.

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

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

1 Deleting messages

  1. Delete old messages. If you have activated automatic email forwarding, you can also have the answering machine delete the messages automatically after forwarding them via email.

2 Switching the telephone off and on again

The following steps are only necessary if you are using a FRITZ!Fon:

  1. Switch the telephone off by holding down the end call key (red handset) and then switch it on again.

3 Connecting a USB storage device to the FRITZ!Box and configuring it

If a USB storage device is connected to the USB port on the FRITZ!Box and you have enabled it for the answering machine, the answering machine can record up to 254 messages. If you do not connect a USB storage device, we cannot guarantee a minimum number of messages that can be recorded or a minimum recording length:

Connecting a USB storage device to the FRITZ!Box

  1. Connect the USB storage device to a USB port on the FRITZ!Box.

    Note:In accordance with the USB 3.0 specification, the FRITZ!Box supplies USB devices with a total of up to 900 mA. If more power is needed, connect the devices to the FRITZ!Box via a USB hub with its own power supply (active USB hub).

Configuring the USB storage device to recording messages

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "Answering Machine" in the "Telephony" menu.
  3. Select the answering machine you want to configure.
  4. Click the "Settings" button.
  5. Click "Additional Settings".
  6. Enable the option "Use USB storage medium to increase recording capacity" in the section "Messages". If you cannot enable this option, disable the USB remote connection:
    1. Click "USB Devices" in the "Home Network" menu.
    2. Click on the "USB Remote Connection" tab. If the tab is not displayed, enable the Advanced View first.
    3. Disable the "USB storage media" option.
    4. Click "Apply" to save the settings.
  7. Click "OK" to save the settings.

4 Testing a different USB storage device

The USB storage device may be defective or incorrectly formatted:

  1. Connect a different USB storage device, preferably a USB memory stick, to the FRITZ!Box.