What is the Sandstone S4016954-ST?
The Sandstone S4016954-ST is a SFP optical transceiver module, listed by the manufacturer as "Huawei Compatible 1G SFP, 1000BASE-EX, 1310 nm, 40km SMF LC, DDM, C-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.