What is the Sandstone 1061800720-01-ST?
The Sandstone 1061800720-01-ST is a QSFP optical transceiver module, listed by the manufacturer as "100G QSFP28, 100GBASE-LR4/OTU4, 1310 nm, 10km SMF LC, DDM, C-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.