What is the Sandstone CWDM-XFP-1510-40KM-ST?
The Sandstone CWDM-XFP-1510-40KM-ST is a XFP optical transceiver module, listed by the manufacturer as "Cisco Compatible 10G CWDM XFP, 10GBASE-ER, OC192-IR2, STM64-S64.2b, 1510 nm, 40km SMF LC, DDM, C-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.