With PWR-HV-P48 installed: 110/220 VDC, 110 VAC, 60 HZ, 220 VAC, 50 Hz, PoE: 48 VDC With PWR-LV-P48 installed: 24/48 VDC, PoE: 48 VDC With PWR-HV-NP installed: 110/220 VDC, 110 VAC, 60 HZ, 220 VAC,

Layer 2 full Gigabit modular managed Ethernet switch with 4 fixed Gigabit ports, 6 slots for optional 4-port GE/FE modules, 2 slots for isolated power modules, up to 28 Gigabit ports, -40 to 75°C operating temperature

Layer 2 full Gigabit modular managed Ethernet switch with 4 fixed Gigabit ports, 6 slots for optional 4-port GE/FE modules, 2 slots for isolated power modules, up to 28 Gigabit ports, -10 to 60°C operating temperature

Layer 3 full Gigabit modular managed Ethernet switch with 4 fixed Gigabit ports, 6 slots for optional 4-port GE/FE modules, 2 slots for isolated power modules, up to 28 Gigabit ports, -10 to 60°C operating temperature

Layer 3 full Gigabit modular managed Ethernet switch with 4 fixed Gigabit ports, 6 slots for optional 4-port GE/FE modules, 2 slots for isolated power modules, up to 28 Gigabit ports, -40 to 75°Coperating temperature

Layer 2 full Gigabit modular managed Ethernet switch with 4 fixed Gigabit ports, 2 slots for optional 4-port GE/FE modules, 2 slots for isolated power modules, up to 12 Gigabit ports, -10 to 60°C operating temperature

Layer 2 full Gigabit modular managed Ethernet switch with 4 fixed Gigabit ports, 2 slots for optional 4-port GE/FE modules, 2 slots for isolated power modules, up to 12 Gigabit ports, -40 to 75°C operating temperature