What is the Dell S4148F-ON?
The Dell S4148F-ON is a QSFP optical transceiver module, listed by the manufacturer as "Dell EMC Switch S4148F-ON. 1U. PHY-less. 48x10GbE SFP+. 4xQSFP28. 2xQSFP+.". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.