What Is Power over Ethernet (PoE)?

Power over Ethernet (PoE) is a technology that enables Ethernet cables to transmit both data and electrical power to devices. This eliminates the need for separate power cables, simplifying installation and reducing costs. PoE is commonly used to power devices like IP cameras, wireless access points, VoIP phones, and other network devices. There are different PoE standards, such as IEEE 802.3af, 802.3at (PoE+), and 802.3bt (PoE++), which define the amount of power that can be delivered to connected devices, ranging from 15.4W to 90W.