What is the Sandstone SFPGE-SX-0ELM-55M-ST?
The Sandstone SFPGE-SX-0ELM-55M-ST is a SFP optical transceiver module, listed by the manufacturer as "MSA Compatible 1G SFP, 1000BASE-SX, 850 nm, 550m MMF LC, DDM, C-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.