What is the Sandstone 280-0199-00?
The Sandstone 280-0199-00 is a SFP optical transceiver module, listed by the manufacturer as "CYAN Compatible TAA Compliant 1000Base-DWDM SFP Transceiver (SMF, 1558.17nm, 120km, DOM, LC)". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.