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Fritzbox: phone is always busy - it's

  • Nov 15, 2025
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What can you do if the phone is busy in the Fritzbox always, you will learn in this practical tip.

Phone to the Fritzbox always occupied – possible causes

If the phone and the Fritzbox is always busy, can come from several causes in question. Below, we provide you some solutions:
  • You should First make sure your phone is properly connected to the Fritzbox.
  • Also, verify that in the box the correct phone number is listed. This can be in the user interface under "telephony" > "Own numbers" check.
  • There you can set under "port settings", and location information. Check if these are set correctly.
  • You can also try to start the Fritzbox new. You can do this in the menu under "System" > "backup" > "restart“.
  • On the basis of the Status-LED "telephony" > "Own numbers" allows you to determine whether you have made the settings correctly. This is the case, if the LED is lit green.
  • May be your phone is defective. Replace this to the Test, to the source of the error, or further restrict.
  • Possibly there is a Update for your Fritzbox. This you can check under "System" > "firmware Update".
  • Of course, you can also use the Fritzbox to factory settings to reset. However, you need to set it up again.
  • It is possible that your provider rejects the selected number or has blocked your connection temporarily. In this case, you should contact your Provider by phone.
Fritzbox: phone is always busy
What to do when the Status-LED of the Fritz box blinks red? Learn the answer in our next practice tip.

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