What is the Sandstone QSFP-100G-SM-SR-ST?
The Sandstone QSFP-100G-SM-SR-ST is a QSFP optical transceiver module, listed by the manufacturer as "Cisco Compatible 100G QSFP28, 100GBASE-CWDM4, 2km SMF LC, DDM, C-Temp, GREEN Latch". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.