We've already written about Power over Ethernet (PoE) at great length here on XDA, but it's worth hammering home just how amazing this technology is for creating a quieter, cleaner, and smarter home local area network (LAN). Years ago, I expanded my home network like many do. You start with the ISP-provided router, add a Wi-Fi-enabled camera, a few smart light bulbs, a voice assistant smart speaker, and some smart pugs. Before you know it, you've got cabling running just about everywhere. Proprietary hubs required power, as do IP cameras and other hardware that can be connected to the LAN. But that's where PoE completely changes everything.

PoE makes better use of available LAN ports on compatible network switches. Instead of relying on a congested wireless network or doubling up cables, one for power and a second for data, PoE lets you use just one Ethernet cable to power a device and facilitate communications. I used to run mostly everything smart home-related on the Wi-Fi, which bogged everything down after a point of no return. I ended up having six IP cameras, countless smart products, portable devices, and other hardware all on the same network. This was terrible for security, performance, and reliability.

That's when I seriously looked at redoing the entire LAN around PoE.

Getting started is easy

Even if you're completely new to networking

PoE is both amazing and fundamentally basic. There's no fancy AI backend that works magic in powering devices; it's all handled by the network switch. These devices, specifically those with PoE support, will have a maximum capacity that can be outputted across all the ports. This is usually more than enough for most devices you'd connect a LAN cable to, but it's worth checking regardless. All the switch does is detect whether the device can receive PoE, and run both electricity and data through the same cable. Data is already electrical signals, so we're not really doing anything new aside from providing a constant supply.

This is great on two fronts. First, it makes PoE incredibly accessible, even to those who know nothing about networking outside of scanning a QR code for the Wi-Fi on the top of their router. Second, it means everything that can support PoE will work with one another. It's an easy standard for device makers to follow, and you shouldn't encounter a single problem with a switch not supplying power to a device on request. The primary goal with PoE is to simplify as much as possible on the LAN, which involves removing as many dedicated DC bricks from the smart home. IP cameras, access points, and other devices can use 12V adapters, which can be stored away when using PoE.

Zero drawbacks, all the gains

Because we're using Cat cabling to handle power delivery and data, there's no drop in supply over greater distances. I've run cables around 15 meters long without any issues relating to the supply of power to a specific device from a network switch. And when you do need to manage power and oversee everything, it's all centralized to each network switch. All the physical cables are accessible in consolidated locations, instead of having to rummage around rooms looking for sockets with the 12V adapter. A nice side effect of this for me is that my switches are behind an uninterruptible power supply (UPS), and all my smart home devices now have battery backups.

Without PoE and cabling for your network, all the hardware on your Wi-Fi has to compete with neighboring routers, microwaves, and everything else in modern homes that emit radio frequencies. PoE over Cat cabling simply works as designed right off the bat. You get full data speeds and power to go along with it. This is particularly useful for the three access points I have strategically positioned around the property. Each is capable of taking a 10 GbE link, which is facilitated by a single cable that also happens to be carrying the PoE supply from the switch. Suddenly, my wireless network becomes all the more brilliant with full battery redundancy.

Creating the ultimate smart home

More data, fewer cables

Switching from relying on home Wi-Fi for most hardware to a network designed and launched for a smarter home, I consolidated a lot. Out are the power adapters hanging from outlets. Gone is the overly congested wireless network. Everything is now cleanly powered and ran through Ethernet cabling. Even if you're unlucky enough to reside somewhere where wiring up the home through walls isn't possible like myself, keeping it tidy is easy using fiber links, which can then utilize multiple switches around the home for powering (and connecting) everything.The difference was immediate and night and day better compared to our previous setup.

t having to deal with wireless signal s ensures that all feeds from our IP cameras are crisp and lag-free. There are also fewer points of failure since everything is handled by the switch. Should the network switch fail, I can simply replace it. It allows me to have spares at hand for minimizing downtime, compared to dealing with various adapters and sometimes even propietary connections. It's also vital for secuirty since if we lose power to the house, our security system will continue to function. Without power and PoE, we'd have to rely on dedicated UPS units per camera.

But it's not just for access points and IP cameras. PoE is great for doorbells, lighting, sensors, tablets, and even speakers. I've got a lot of technology to conenct around the house and using PoE with Ethernet cabling whenver possible ensures I have smooth and reliable routes to and from Home Assistant. And have you ever noticed that some power bricks and adapters can hum? Vibrations, heat, and buzzing components can all produce noise that's largely inaudible until noticed. Then you'll struggle to overcome that whine whenever you enter the room or pass by a specific socket.