What is the Sandstone 7SP-402-ST?
The Sandstone 7SP-402-ST is a SFP+ optical transceiver, listed by the manufacturer as "Accedian Compatible 10G SFP+, 10GBASE-ZR, 1550 nm, 80km SMF LC, DDM, C-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.