AP-ESR-2108 is an 8 10/100Mbps ports unmanaged reverse poe switch that requires no configuration and provides 6 incoming PoE (Power over Ethernet) ports. It can automatically detect and accept power with 24V Passive PoE compliant Powered Supply Equipment (PSE). In this situation, the electrical power is transmitted along with data in one single cable allowing you to expand your network to where there are no power lines or outlets, this product suit for your FTTX solution and slove the power supply of your ONU equipment in your building corridor.