What is the Sandstone 160-9401-900-ST?
The Sandstone 160-9401-900-ST is a QSFP optical transceiver module, listed by the manufacturer as "Ciena 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.