24 2.5GbE Multi-Gigabit 90W PoE++ ports and 4 10GbE SFP+ ports One-click to create Surveillance VLAN and auto-discover, auto-enrolled Surveillance compliant devices at once Dedicated Intelligent Thermal Controller to control fan speeds for power saving and noise reduction PoE powered devices (PD) alive check to enhance the reliability of the network Dual-firmware image for robust failover mechanisms PoE long distance to 200 meters Power backfeed protection to avoid damaging the PoE ports IEEE 802.3bt/at/af PoE++ compliant, up to 90W per port (total power budget: 400W) for powering PoE-enabled devices Supports SNMP v1/v2c/v3, Access Control List (ACL), QoS, 802.1Q VLAN, IPv4/IPv6, Port Trunking, Port Mirroring, IGMP v1/v2/v3 Snooping and etc