What is the Sandstone SFP-10/25G-LR-S-ST?
The Sandstone SFP-10/25G-LR-S-ST is a SFP optical transceiver module, listed by the manufacturer as "Cisco Compatible 25G SFP28, 25GBASE-LR, 1310 nm, 10km SMF LC, DDM, C-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.