What is the Sandstone 280-0188?
The Sandstone 280-0188 is a XFP optical transceiver module, listed by the manufacturer as "Cyan Compatible 10G CWDM XFP, 10GBASE-ZR, 1550 nm, 80km SMF LC, DDM, I-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.