What is the Sandstone 1442942F2-ST?
The Sandstone 1442942F2-ST is a XFP optical transceiver module, listed by the manufacturer as "Adtran Compatible 10G XFP, 10GBASE-BX-U, TX1270/RX1330 nm, 40km SMF LC, DDM, C-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.