What is a POE switch?

A POE (Power over Ethernet) switch is a device that can transmit data and power simultaneously through an Ethernet cable. This technology allows network devices such as IP cameras, wireless access points, and VoIP phones to be powered solely by a single network cable, simplifying installation and reducing costs. POE switches typically have multiple ports, allowing for easy expansion of the network and connection of multiple devices. POE technology is divided into multiple standards, such as IEEE 802.3af (maximum 15.4W) and IEEE 802.3at (maximum 30W), as well as newer IEEE 802.3bt (maximum 60W or 100W). When selecting a suitable POE switch, one should consider the power needs of the devices and the size of the network.