What is the Sandstone SFP1G-LX-31-ST?
The Sandstone SFP1G-LX-31-ST is a SFP optical transceiver module, listed by the manufacturer as "GLC-LH-SMD-ST - 1000BASE-LX/LH SFP". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.