Which UTP5E cores to cut if you need a switch for a PoE device?

Question

CCTV

Hello.
I was interested in the implementation of turning off / rebooting PoE devices through a relay controlled by ESP8266.
It’s not comme il faut to fence a garden of relays, but with different PoE standards, as I understand from the manuals, different cores are used for power. But like brown are GND for all options.
Has anyone implemented something like this? What veins are still interrupted?

Answer 1

Orange and white-orange must be torn when it comes to method "A" of the 802.3af standard

Answer 2

I would think in the direction of the PoE switch, with the correct microcircuit inside (in extreme cases, you can separate its i2c interface and do everything through it), and tearing the twisted relay through the relay is some kind of "collective farm".

Answer 3

If these are Chinese ip-cameras with the so-called passive poe, then there simply 48 volts of direct current is transmitted through unused pairs: +48 V goes through blue and white-blue, and ground through brown and white-brown.
You can not fence the construction of esp and relay, but buy a sonoff wifi switch and cut off 220 volts with it at the power supply itself.