What is the Sandstone CWDM-SFP-10G-1510-40K-ST?
The Sandstone CWDM-SFP-10G-1510-40K-ST is a SFP+ optical transceiver, listed by the manufacturer as "Cisco Compatible 10G CWDM SFP+, 10GBASE-ER, 1510 nm, 40km SMF LC, DDM, C-Temp, VIOLET LatchLatch". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.