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What is POE? Here are the answers!

Views : 129
Author : CETUS INTL
Update time : 2024-01-18 14:41:16
Have you ever seen the word POE? Are you also curious about POE? This article will help you understand what POE is! What is poe here are the answers.

What is POE?
Power over Ethernet, referred to as PoE. We can also call PoE power supply. This is a technology that can transmit power and data to devices through twisted pairs in Ethernet.

What is poe?

Can you give a detailed introduction to POE?
Internet phones, wireless base stations, cameras, hubs, computers and other equipment can all be powered by PoE technology. Electronic devices that can be powered by Ethernet can be used without the need for additional power sockets. Therefore, the cost of the entire equipment system can be relatively reduced. Currently, RJ-45 network sockets are commonly used around the world, so various PoE devices are compatible.

This technology is often compared to traditional telephone networks, which also receive power and data on the same cable. PoE can operate without changing the Ethernet cable structure. So the PoE system not only saves costs, is easy to wire and install. But also has the ability to power on and off remotely.

PoE is divided into Power Sourcing Equipment and Powered Device. There is even a difference between AT and AF.
PoE also has competitors, namely Universal Serial Bus technology. It also provides data and power simultaneously. But this standard is designed for short-distance applications, and the independent power supply power is less than 2.5W.

It is cheaper than PoE and works well with low-power peripherals. Such as PC mice, headsets and hubs. However, some peripherals such as speakers, scanners and printers require power that cannot be provided by USB 2.0.
There are many different terms referring to this function. For example: Power over Ethernet (PoE), Power over LAN (PoL), Power on LAN (PoL) and Inline Power. These all refer to technologies that provide power to various devices via Ethernet ports.

There are many ways to implement PoE, including ad-hoc methods. But it is recommended to use IEEE standards to implement technology powered by network lines.

Things about AT and AF!
IEEE802.3AF
The PSE provides a voltage of 44~57V and a DC power supply of about 350mA. Each port must provide at least 15.4W of power. After passing through a 100-meter CAT-3 cable, the number of watts that the PD can receive must be at least 12.95 W.

IEEE802.3AT
The PSE side provides a voltage of 50~57V and a DC power supply of about 600mA. Each port must be able to provide at least 30W of power. After passing through a 100-meter CAT-5 cable, the number of watts that the PD side can receive must be at least 25.5 W.

The above is an introduction to POE.