What is the Sandstone 280-0030-ST?
The Sandstone 280-0030-ST is a SFP optical transceiver module, listed by the manufacturer as "Cyan Compatible 1G SFP, 1000BASE-LX, 1310 nm, 10km SMF LC, DDM, I-Temp, BLUE Latch". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.