What’s the difference between PoE, PoE+, and PoE++?

The main difference is how much power each one can deliver. PoE (Type 1) delivers up to 15.4W, PoE+ (Type 2) delivers up to 30W, and PoE++ (Type 3/4) can deliver up to 60–100W. Higher-powered devices like 4K signage players or multi-screen hubs usually need PoE++.

Can PoE power a digital signage display and media player?

It depends on the hardware. Many media players work well with PoE+ or PoE++. Some smaller displays with built-in players can also run on PoE. But full-size commercial screens, and some smaller digital signage players often still need separate power.

What type of Ethernet cable should I use for PoE?

Cat5e is the most basic option, and will work for standard PoE and PoE+. For PoE++ or longer cable runs, it’s safer to use Cat6 or higher to reduce power loss and keep things stable.

Is passive PoE the same as standard PoE?

No. Passive PoE doesn’t follow IEEE standards and can deliver unpredictable voltages. It works in some niche setups, but for most digital signage deployments, stick with standard (active) PoE for safety and compatibility.

What’s the difference between PoE+ and AT?

There’s no difference. PoE+ and IEEE 802.3at are two names for the same thing. PoE+ is the common term, while 802.3at is the official standard name. Both deliver up to 30W of power per port.

Which PoE class is best?

here’s no “one best” class; it’s about matching power output to what your device needs. Class 0–3 (PoE) is best for low-power devices like phones or small cameras. Class 4 (PoE+) works for mid-range devices like touch panels or media players. Class 5–8 (PoE++) is best for high-power devices like 4K displays, video walls, or advanced Wi-Fi gear. T

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Resources

I.T.

PoE Standards Explained: Which One Should You Use?

Last Updated: 06/4/2025

Resources

I.T.

PoE Standards Explained: Which One Should You Use?

What are PoE standards?
What are the different types of PoE?
Best use cases for each PoE standard
Using PoE with your digital signage
In summary
Ready to simplify your signage setup?

PoE Standards Explained: Which One Should You Use?

PoE Standards Explained: Which One Should You Use?

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