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When to use Power over Ethernet?

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Author : CETUS INTL
Update time : 2024-12-05 09:44:12
This article will introduce you to when you need to use Power over Ethernet.



POE technology is mainly used in the following scenarios:
Network cameras and surveillance systems: 
POE technology is widely used in network cameras and other surveillance equipment, both indoors and outdoors. It eliminates the extra cables and power adapters required for cameras and surveillance equipment.

‌IP phones and voice communication equipment: 
POE powers IP phones, intercoms, and audio conferencing equipment, simplifying deployment and relocation in offices.

‌Wi-Fi access points: 
In wireless networks, POE can be used to provide power to Wi-Fi access points. This avoids additional power lines while improving the flexibility and scalability of the network.

Building automation: 
POE technology manages smart lighting, temperature, security, and other building systems. This can better realize smart building automation.

‌Medical equipment: 
Some equipment in the medical field can be powered by POE. This can reduce the confusion of wires and the complexity of equipment deployment.

‌Industrial Automation‌:
In industrial environments, POE can be used to power and connect various sensors, controllers, and machines. This facilitates industrial automation and monitoring.
‌Digital Signage and Displays‌: 
POE can be used to power digital signage, advertising displays, kiosks, etc. This can simplify the layout and management of equipment.

‌Security Access Control System‌: 
POE powers and connects card readers, door locks, and visitor devices in access control systems. This provides more convenient access control.

How POE works and how it powers the device
POE technology transmits data signals over the existing Ethernet Cat.5 cabling infrastructure. It can also provide DC power to IP-based terminal devices.
There are two POE power supply schemes:
‌Mid-span method‌: Use unused idle pairs in Ethernet cables to transmit DC power.
‌End-spanning method : DC power is transmitted with data, removing the need for separate power lines.
Historical background and technical standards of POE
The IEEE Standards Committee issued three POE standards: IEEE 802.3af, 802.3at, and 802.3bt.