Video door intercom system - Which one is recommended?

Well, I am now venturing onto thin ice, but I would claim:

Since the [Bild und Tonübertragung] has always been part of the system.

The intercom system has also always been integrated, and I am not really aware that anyone has ever been dissatisfied with the system. Ergo, it can be purchased.

I assume it is about the T25?

Has anyone installed the DOORBIRD D2101V and can report?

Are there any further experiences with IP cameras here by now?

Since many owners of a video intercom system are already active here: At what height have you installed your outdoor station?

Hi, I'm new here and have a question. I installed a Mathel 1Famileinhaus video intercom system with 2 monitors. My electrician took forever to connect the thing to the e opener of the door. In the beginning, everything worked, but for a few days now, I only get a blue screen and the e opener doesn't work anymore :S Does anyone have experience with the manufacturer?? My electrician has no interest anymore, maybe you can help me

I know a blue picture from somewhere, we also had that problem once when connecting our system. It was a contact issue, some cable didn't have a proper connection and therefore neither the opener nor the picture worked.