POE power supply A complete POE system includes two parts: power sourcing equipment (PSE) and power receiving device (PD).
PSE devices are devices that power Ethernet client devices and are also managers of the entire POE Ethernet power supply process. The PD device is the PSE load that receives power, which is the client device of the POE system, such as IP phones, network security cameras, APs, smart embedded IoT serial servers, and many other Ethernet devices. The two are based on IEEE 802.3af, IEEE 802.3at, and IEEE 802.3bt (draft) standards to establish information connections regarding the connection status, device type, power consumption level, and other aspects of the receiving end device PD. Based on this, PSE supplies power to the PD through Ethernet