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Knowledge document #354

Cordless telephone reports "No resources"

You cannot use a cordless telephone (for example FRITZ!Fon C5) registered with the FRITZ!Box to make calls. When you try to make a call, one of the following messages is shown on the telephone display:

  • "No resources"
  • "No Resource"
  • "No Route to destination"

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 Selecting the correct connection type for the telephone number

Since 2018, no new internet connections with landlines have been activated in Germany. New connections are always IP-based connections without splitters or NTs. In addition, almost all existing connections were converted to IP-based connections. If you configured the telephone number as a landline number in the FRITZ!Box, you probably selected the incorrect connection type:

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "Telephone Numbers" in the "Telephony" menu.
  3. Click the (Delete) button for the telephone number.
  4. Reconfigure the telephone number and select your internet telephony provider during setup.
  5. If you are unable to register the telephone number after setup, contact your provider to have them check your telephone number and login information.

2 Reconfiguring your telephone

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "Telephony Devices" in the "Telephony" menu.
  3. Delete the telephone that cannot be used to make calls from your landline. To do so, click the corresponding (Delete) button.
  4. Reconfigure the telephone: Click "Configure New Device" and follow the instructions.

3 Checking the landline

  1. Disconnect the FRITZ!Box from the landline.
  2. Connect a telephone to the same line.
  3. If the telephone also does not work when connected to the line, contact your telephony provider and have your line checked.

    ATTENTION!You may be charged for checking. Ask your telephony provider about charges in advance!

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