Start with the riser, not the camera When people plan to upgrade a video intercom in an existing apartment block, they start by choosing a door station with a nice finish. That is the fourth decision, not the first. The first is what is already inside your walls, because in most buildings that ...
Source: [Dev.to](https://dev.to/xingliao/replacing-a-video-intercom-in-an-old-building-what-actually-fits-7ll)