What is a POE switch

Switch port support output power up to 15.4W, in line with the IEEE802.3AF standard, through the network cable power to the standard Poe Terminal Equipment power supply, eliminates the additional power wiring. After research and development of the introduction of the IEEE802.3AT Standard Poe switch, the port output power can reach 25-30w. In layman's parlance, Poe switch is to support network cable power switch, it not only can realize the data transmission function of the ordinary switch but also can power the net terminal at the same time.

POE refers to the transmission of data signals to some ip-based terminals (such as IP telephones, wireless LAN access point APS, network cameras, etc.) while the existing Ethernet CAT.5 cabling infrastructure is not changed Ethernet It can also provide DC-powered technology for such equipment. Poe technology can ensure the existing structure wiring security while ensuring the normal operation of the existing network, to minimize costs.

Poe is also known as a LAN based power supply (POL) or active Ethernet, sometimes referred to as Ethernet power, which is the latest standard specification for transmitting data and power while using existing standard Ethernet transmission cables, and maintains compatibility with existing Ethernet systems and users. The IEEE 802.3AF standard is the new standard for Poe based on the Ethernet power supply system, which, based on IEEE 802.3, adds the relevant standards for direct power through the network cable, is an extension of existing Ethernet standards and is the first international standard on power distribution.

IEEE began setting up the standard in 1999, with the earliest participants being 3Com, Intel, Powerdsine, Nortel, Mitel and National Semiconductor. However, the shortcomings of the standard have been restricting the expansion of the market. Until June 2003, IEEE approved the 802. 3AF Standard, it clearly stipulates the power detection and control matters in the remote system, and provides the way for the routers, switches and hubs to power the IP phone, the security system and the wireless LAN access point through the ethernet cable. The development of the IEEE 802.3AF encompasses the efforts of many corporate experts, which makes it possible to test the standards in all respects.

A typical Ethernet power supply system. In the wiring cabinet to retain the Ethernet switch equipment, with a power supply hub (Midspan hub) to the local area network of twisted pair cable power supply. At the end of the twisted pair, the power supply is used to drive telephones, wireless access points, cameras, and other devices. To avoid power outages, you can choose a UPS.