Power over Ethernet facts for kids
Power over Ethernet (PoE) is a clever technology that lets devices get both electricity and internet data through the same Ethernet cable. Imagine only needing one cable instead of two! This is super helpful because it makes setting up devices much easier and tidier.
PoE is often used for things like IP phones, Wi-Fi access points, and network cameras. It's also great for network switches or small computers that are far from power outlets. Sometimes, it's hard or costly to add a separate power cable, so PoE solves that problem.
This idea is a bit like old-fashioned landline telephones. They also got their power and sound through the same wire. The best part is that PoE works with the regular Ethernet cables we already use, so you don't need to change your existing setup.
You might hear different names for this technology. Terms like Power over Ethernet (PoE), Power over LAN (PoL), and "inline power" all mean the same thing. They describe how devices get power through their Ethernet connection.
How Power over Ethernet Works
PoE systems have two main parts: a power source and a device that receives power. The power source is usually a special network switch or a small adapter called an "injector." This source adds electricity to the Ethernet cable.
The device on the other end, like a Wi-Fi camera, then uses this power to turn on and work. It's designed to safely take the power from the data cable. This means you don't need a separate wall plug for that device.
Where is PoE Used?
PoE is used in many places to make things simpler and more flexible.
- IP Phones: Many office phones use PoE. This means fewer cables on desks and easier installation.
- Wi-Fi Access Points: These devices give you wireless internet. With PoE, you can place them high up on ceilings or walls where power outlets might not be available.
- Security Cameras: Network cameras often use PoE. This makes it easy to install them outdoors or in hard-to-reach spots without needing an electrician to add a power outlet.
- LED Lighting: Some modern LED lights can also use PoE. This allows for smart lighting systems that are controlled and powered by the network.
- Point-of-Sale Systems: Cash registers and card readers in stores can use PoE for a cleaner setup.
Using PoE can save money on electrical wiring and make it easier to move devices around. It also helps keep things running during power outages if the PoE power source has a backup battery.
Images for kids
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An Avaya ERS 5500 switch with 48 Power over Ethernet ports.
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A Cisco 7906 VoIP phone that uses PoE.
See also
In Spanish: Power over Ethernet para niños
