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