What is the Sandstone 280-0200-00-ST?
The Sandstone 280-0200-00-ST is a SFP optical transceiver module, listed by the manufacturer as "SFP, DWDM 1557.36nm, EZX SMF 120km, 29dB, 1000Base DDM, Compatible". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.