The equipment you are using should be a non-standard POE switch. Common POE switches in the market are divided into: protocol-powered POE (supporting IEEE802.3af/802.3at), which will detect whether the connected network equipment has a receiving end of POE. If there is power, there is no power, only data transmission is provided; ) and non-protocol power supply POE (single-port forced power supply, regardless of whether the receiving equipment needs electricity, it will supply power, and the standard of power supply is the standard set by the manufacturer when you buy the equipment, so it will burn out the equipment). The equipment I use is a 5-port POE switch of Yi Bei optical fiber communication. Personally, I suggest using the protocol POE switch. So when communicating with POE switch, I suggest consulting information such as power supply, power supply port and backplane bandwidth. ...
Hope useful to you