What is the Sandstone 280-0276?
The Sandstone 280-0276 is a SFP+ optical transceiver, listed by the manufacturer as "Cyan Compatible 10G SFP+, 10GBASE-ER, OC192-IR2, STM64-S64.2b, 1550 nm, 40km SMF LC, DDM, I-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.