HIKVISION DS-3E1518P-SI 16 Port Gigabit Smart POE SwitchHIKVISION DS 3E1518P SI 16 Port Gigabit Smart POE Switch 16 gigabit PoE ports, and 2 gigabit fiber optical ports. IEEE 802. 3at af standard for PoE ports. Network topology management, alarm push, network health monitor. 6 KV surge protection for PoE ports. AF AT camera can reach up to 300 m in extend mode. PoE watchdog to auto detect and restart the cameras that do not respond. Various layer 2 management protocols such as STP RSTP, VLAN, link