Telcordia (Bellcore), GB

Layer 2 Full Gigabit managed Ethernet switch with 20 10/100/1000BaseT(X) ports, and 4 10/100/1000BaseT(X) or 100/1000BaseSFP slot combo ports, 2 isolated power supplies (85 to 264 VAC), -40 to 75°C operating temperature

Power supply module (24/48 VDC) with system power input, relay

Power supply module (110/220 VAC/VDC) with system power input, relay, PoE power input

110/220 VAC/VDC power supply module with system power, relay, PoE power input, advanced heat sink for MDS-G4000-4XGS

Power supply module (110/220 VAC/VDC) with system power input, relay

Layer 3 Full Gigabit managed Ethernet switch with 12 10/100/1000BaseT(X) ports, 8 100/1000BaseSFP slots and 4 10/100/1000BaseT(X) or 100/1000BaseSFP slot combo ports, 2 isolated power supplies (85 to 264 VAC), -40 to 75°C operating temperature