What is the Sandstone QSFP28-LR4-S-1102-ST?
The Sandstone QSFP28-LR4-S-1102-ST is a QSFP optical transceiver module, listed by the manufacturer as "QSFP28-LR4-S-1102-ST PacketLight Compatible 100G QSFP28, 100GBASELR4/ OTU4, 1310 nm, 10km SMF LC, DDM, C-temp.". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.