What is the Sandstone 02311BKT-ST?
The Sandstone 02311BKT-ST is a QSFP optical transceiver module, listed by the manufacturer as "Huawei Compatible 40G QSFP+, 40GBASE-ER4, 1310 nm, 40km SMF LC, DDM, C-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.