What is the Sandstone QFP100-LR1-0ELS-10K-ST?
The Sandstone QFP100-LR1-0ELS-10K-ST is a QSFP optical transceiver module, listed by the manufacturer as "MSA Compatible EXFO 100g QSFP28, 100gBASE-LR1, 1310nm, 10km SMF LC, DDM, C-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.