What is the Sandstone 280-0196-00?
The Sandstone 280-0196-00 is a SFP optical transceiver module, listed by the manufacturer as "Cyan Compatible Multi-Rate DWDM SFP, OC48/12/3-EZX, OC48-LR2, 100M-2.7Gbps, 1560.61 nm, CH21, 120km SMF LC, DDM, C-Temp, GREEN Latch". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.