What is the Sandstone CAB-Q-Q-5M-ST?
The Sandstone CAB-Q-Q-5M-ST is a QSFP optical transceiver module, listed by the manufacturer as "40GbE QSFP+ to QSFP+ twinax copper cable, 5M". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.