For those that want to know, this is what Milibrat said. Sounds like an advertisement, to me: IP registrars with Poe switches in most cases combined solutions are designed for small and medium-sized security systems. Ease of use PoE switches, combined with registrars, is that installation and commissioning of this system greatly simplified. After cabling infrastructure for Plug and Play principle applies-it significantly reduces installation time and reduces the number of cables, which positively affects reliability and an aesthetic component, which would be important, for example, in the construction of the security system in apartments and homes or small shops.
4 k video surveillance in modern analog component analog systems there is not too much. The camera and the recorder has long turned into digital devices, and analog cable signal was left between them.