What is the Sandstone 280-0011?
The Sandstone 280-0011 is a XFP optical transceiver module, listed by the manufacturer as "Transmode Compatible 10G DWDM XFP, 10G-ZR, 1549.32 nm, CH35, 80km SMF LC, DDM, C-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.