Eli5: How does Ethernet over Power works?

Question

And while we’re at it, how does Power over Ethernet (PoE) works?

Thanks

In: Engineering

Answer 1

basically, Ethernet signals are just pluses of electrical energy down a wire. EOP and POE pretty much just increase the “carrier” signal for the messages up to a useful amount of power. instead of watching for a shift between 0.1 and 0.2 volts, you are looking for a shift between 120.1 and 120.2 volts instead.

its a bit more complex than that, but thats the ELI5 version