What is the Sandstone CWDM-SFP-10G-1590-ST?
The Sandstone CWDM-SFP-10G-1590-ST is a SFP+ optical transceiver, listed by the manufacturer as "Cisco Compatible 10G CWDM SFP+, 10GBASE-ZR, 1590 nm, 80km SMF LC, DDM, C-Temp, RED Latch". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.