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What is PoE for PC?

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Author : CETUS INTL
Update time : 2024-11-28 09:48:11
Power over Ethernet‌ is a technology that transmits power and data simultaneously over existing Ethernet cables.
It allows network devices to be powered without the need for additional power outlets, thus simplifying wiring and maintenance.
Power over Ethernet‌ technology is great for devices in hard-to-reach places. It works well where there are no power outlets, like IP cameras and wireless access points.



How it works
PoE technology is implemented through two main components: power supply equipment and powered devices. PSE is often a network switch or injector. PD can be devices like an IP camera, VoIP phone, or wireless access point. PSE provides power to PD through Ethernet cable while transmitting data signals‌.

Application scenarios
PoE technology is widely used in various devices that require network connection and power supply. Since these devices are often placed far from power outlets, PoE technology can solve the power supply issue. At the same time, it reduces wiring costs and maintenance difficulties.

Historical background
The standard for PoE technology was developed by IEEE in 1999, and the earliest standard was 802.3af. The 802.3at was followed by the latest 802.3bt. These standards outline the key factors for supplying power directly through network cables. They ensure proper power supply and control for the equipment.

Types and standards
Many types of PoE devices exist, including PoE switches, PoE splitters, and PoE power supplies. The main PoE power supply standards are IEEE 802.3af and IEEE 802.3at. These standards define different power and current needs.