What is the Sandstone CWDM-SFP-1490-ST?
The Sandstone CWDM-SFP-1490-ST is a SFP optical transceiver module, listed by the manufacturer as "Cisco ASR Compatible Multi-Rate CWDM SFP, 1000BASE-ZX, 1490 nm, 80km SMF LC, DDM, C-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.