What is the Sandstone QSFP+-40G-CU1M-ST?
The Sandstone QSFP+-40G-CU1M-ST is a QSFP optical transceiver module, listed by the manufacturer as "QSFP+ Passive Copper Cable 28AWG to SFP+, CR4 40G, 1m cable". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.