Detail overview DELL R2RKC Networking S4148f-on 48p 10gbe Sfp+ 2p Qsfp+ 4p Qsfp28 Switch. Ports: 48 X 10gbe Sfp+ Uplink Ports: 2x 40gbe Qsfp+, 4x 100gbe Qsfp28 Power Supply: 2x 550w Ac Hot Swap Airflow: Standard, Io To Psu Operating System: Os 10 Condition : Refurbished. Availability : In Stock. Warranty : 30 Days.