48 Ethernet 10/100/1000 with IEEE 802.3af and Cisco prestandard PoE ports 4 SFP-based Gigabit Ethernet ports 32-Gbps, high-speed stacking bus Innovative stacking technology 1 RU stackable, multilayer switch Enterprise-class intelligent services delivered to the network edge IP Base software feature set (IPB) Supported Options Power Supply PWR-C1-350WAC SFP Module GLC-LH-SMD