What is the Sandstone RDH90120/B1424-ST?
The Sandstone RDH90120/B1424-ST is a SFP optical transceiver module, listed by the manufacturer as "Ericsson Axxessit Compatible 155M SFP, OC3-LR2, 1550 nm, 80km SMF LC, DDM, I-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.