What is the Sandstone 1442971G6-ST?
The Sandstone 1442971G6-ST is a XFP optical transceiver module, listed by the manufacturer as "Adtran Compatible 10G CWDM XFP, 10GBASE-ZR, OC192-LR2, STM64-L64.2, 1570 nm, 80km SMF LC, DDM, -40C to 70C". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.