NetVanta 1524ST - Managed Layer 2 Gigabit Ethernet switch, 24 10/100/1000Base-T ports with SFP module slots (21-24) for high-speed uplink or stacking requirements, The Netvanta 1524ST Uses industry-standard SFP modules, Non-blocking switching capacity: 48 Gbps, 1U, 19-inch rackmount metal enclosure, 1.7" H, 17.2" W, 7.8" D, Auto-ranging power (100-250 VAC, 50-60 Hz). Adtran 1200560E2