What is the Sandstone 407-BCDH-ST?
The Sandstone 407-BCDH-ST is a QSFP optical transceiver module, listed by the manufacturer as "DELL Compatible 100G QSFP28, 100GBASE-LR4/D, 1310 nm, 10km SMF LC, DDM, C-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.