What is the Dell S4048T-ON?
The Dell S4048T-ON is a QSFP optical transceiver module, listed by the manufacturer as "Dell S4048T-ON Switch, 48x 10GBASE-T RJ45, 6x QSFP+, 2x AC PSU ,2x fans + RAIL KIT". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.