What is the Sandstone MMA1B00-C100D-ST?
The Sandstone MMA1B00-C100D-ST is a QSFP optical transceiver module, listed by the manufacturer as "Mellanox Compatible 100G QSFP28, 100GBASE-SR4, 850 nm, 100m MMF MPO12, DDM, C-Temp, BEIGE Latch". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.