What is the Sandstone XFP-DWLR08-57-ST?
The Sandstone XFP-DWLR08-57-ST is a XFP optical transceiver module, listed by the manufacturer as "MRV Compatible 10G DWDM XFP, 10GBASE-ZR, OC192-LR2, STM64-L64.2, 1531.90 nm, CH57, 80km SMF LC, DDM, C-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.