What is the Sandstone UF-SM-10G-ST?
The Sandstone UF-SM-10G-ST is a SFP+ optical transceiver, listed by the manufacturer as "Ubiquiti Networks Compatible 10G SFP+, 10GBASE-LR, 1310 nm, 10km SMF LC, DDM, C-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.