18 PortsIncludes 16 ports 10/100Mbps POE and 2 Gigabit Uplink(100/1000Mbps); supports port automatically adaptive. The 2 gigabit uplink support higher rate than 100M port, improve 1-16 port bandwidth utilization. IEEE 802.3af/atPoE Ports 1-16 support ieee802.3af/at POE, max 30W; The whole machine output power is 200W. Output POE voltage 44~57V, typical value 48V. *Please note: it will not supply power to passive 24V PoE and NON-PoE devices.* Vlan Isolation & Extend DistancePorts 1-16 support VLAN port isolation and cannot communicate with each other, only communicate with uplink port 17-18 port, which can reduce network congestion, improve performance and safety; ports 1-16 support POE distances up to 250 meters, the rate is 10Mbps. Unmanaged Plug and PlaySupports automatic detection of power supply for POE devices, built-in power module, just connect the power cord, and connect to the device through the network cable, no other configuration is