... half-duplex, 802.3x at full-duplex, CAR support, 100M port: 1M step size; 1000M port: ... -based user authenticationPort SecurityHardware support for IP ACL, MAC ACL, VLAN ACLHardware support for port-based user ... 63 Hz, DC 44 ~ 53 V, 24 1000M TX ports Support POEWorking environmentTemperatureOperating: 20 ~ 50°C, non-operating: -40 ... interface optical module High Performance Gigabit Ethernet POE Switch