Thank you for the tips. I will take a closer look at it. However, I have to ask again, where is the difference for me as a user between having a 2-wire bus line installed or alternatively a LAN cable. What can one do better than the other? I am a bit confused and don’t know what to tell the electrician. Alternatively, I have considered getting a “normal” doorbell and setting up a separate camera with a motion detector or something like that. Then I would be notified when there is movement and could view the camera image. Is there an adequate solution for this? Or am I overcomplicating things? Thanks again.