And while we’re at it, how does Power over Ethernet (PoE) works?
Thanks
In: Engineering
You have 3 people, 1 person doesn’t make any noise and just listens. One of the other two people is making a constant hum noise, the other is talking normally. As the listener it’s pretty easy to ignore the person making the hum noise and just listen to the person talking, right? PoE basically works this way, but the person making the hum noise is DC power and the person talking is the data. DC power is a constant voltage and easy to separate from the data (which is not constant voltage). There are some variations of PoE where the power and data are on separate wires, but for most modern PoE over gigabit ethernet they share the same wires.
Ethernet over Power is a big more complicated but works similarly. The AC power in your house is of a constant frequency so you can put some digital data (at a different frequency) on the same wires then separate them with a filter at the other end.
Latest Answers