Single-port Ethernet power supply equipment, which is suitable for indoor use, can work normally from 100VAC to 240VAC input voltage. The power supply and network terminal equipment are connected by over five types of cables. It has an Ethernet data port and an output port after data and power combination. This device can provide POE power supply applications in line with IEEE802.3af/at international standards for all Ethernet devices, such as routers, switches, wireless AP, network telephones, industrial network terminals, network cameras, etc. It can also provide efficient engineering in places where power supply cannot be provided remotely or where power supply by Ethernet network lines can be used to improve system reliability and simplify equipment installation.