What is the Sandstone CIS-QSFP-100G-LR4-LC-ST?
The Sandstone CIS-QSFP-100G-LR4-LC-ST is a QSFP optical transceiver module, listed by the manufacturer as "Cisco compatible, 1S00G-LR4, QSFP28, for single mode fiber, 1310nm, 4 lanes, 10km/6.3dB, LC duplex connectors, DOM". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.