What is the Sandstone 10312-ST?
The Sandstone 10312-ST is a QSFP optical transceiver module, listed by the manufacturer as "Extreme Networks Compatible 40G QSFP+, 40GBASE-DAC, 1m 28AWG QSFP+, NO DDM, C-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.