What is the Sandstone 280-0464-ST?
The Sandstone 280-0464-ST is a SFP+ optical transceiver, listed by the manufacturer as "Cyan Compatible 10G CWDM SFP+, 10GBASE-ZR, OC192-LR2, STM64-L64.2, 1490 nm, 80km SMF LC, DDM, E-Temp, VIOLET Latch". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.