POE (Power Over Ethernet) refers to the existing Ethernet cabling infrastructure Cat.5 not make any changes to the case, for a number of IP-based terminal (such as IP telephones, wireless LAN access point AP, network cameras etc.) transmission of data signals, while also providing a DC power supply device for such technology. POE is also known as the power supply system based on LAN (POL, Power over LAN) or an active Ethernet (Active Ethernet), sometimes also referred to as Ethernet, which is transmitted using the existing standard Ethernet cable to transmit data and simultaneously New standard specification of electrical power and maintaining compatibility with existing Ethernet systems and users.

POE technology to ensure the normal operation of the existing network to ensure the safety of existing structured cabling, while minimizing costs. The new standard is based on the IEEE 802.3af standard Power over Ethernet POE system, which increases the relevant standards are powered directly through the network cable on the basis of the IEEE 802.3, is an extension of existing Ethernet standards, is the first international on power distribution standard