What is the Sandstone GLC-FE-100LX-ST?
The Sandstone GLC-FE-100LX-ST is a SFP optical transceiver module, listed by the manufacturer as "Cisco Compatible 100M SFP, 100BASE-LX, 1310 nm, 10km SMF LC, NO DDM, C-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.