What is the Sandstone S4016067-ST?
The Sandstone S4016067-ST is a SFP optical transceiver module, listed by the manufacturer as "Huawei Compatible 1G SFP, 1000BASE-LX, 1310 nm, 10km SMF LC, DDM, C-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.