I have checked the ethernet cable and everything seems fine. I'm getting tired of this, also IMO the whole C4 doorstation functionality is just to complicated and rigid, if it doesnt work you dont really now why and sometimes even the delaer can't help (although he will charge for the help...). IDK, compared to some other doorbells this just seems a very expensive solution which don't really give you nothing special...
Since I have an Echo show in my kitchen, echo spot in the bedroom, echo show 8 in the office, echo show and 2 fire HD tablets mounted in hallways I am more and more inclined to replace the C4 doorbell with Ring elite. It has more functionalities, is cheaper and will integrate into my system better.
All this in a house where I have started with everything controlled by C4 (from all lights, blinds, windows, alarm, audio and video zones,...almost 30k worth of equipment). A pity really...