What is the Sandstone 160-9404-900-I-ST?
The Sandstone 160-9404-900-I-ST is a QSFP optical transceiver module, listed by the manufacturer as "Ciena Compatible 100G QSFP28, 100GBASE-ER4/OTU4, 1310 nm, 40km SMF LC, DDM, I-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.