What is the Sandstone 280-0451-ST?
The Sandstone 280-0451-ST is a SFP+ optical transceiver, listed by the manufacturer as "Cyan Compatible 10G DWDM SFP+, 10GBASE-ZR, OC192-LR2, STM64-L64.2, Tunable, C-Band, 80km SMF LC, DDM, C-Temp, GREEN Latch". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.