What is the Sandstone SU68HQ-ST?
The Sandstone SU68HQ-ST is a SFP optical transceiver module, listed by the manufacturer as "Marconi Compatible Multi-Rate DWDM SFP, 1000BASE-EZX, OC48-LR2, 100M-2.7Gbps, 1547.72 nm, CH37, 120km SMF LC, DDM, C-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.