What is the Sandstone FOFL-DW57-PTSI9?
The Sandstone FOFL-DW57-PTSI9 is a network/telecom equipment component, listed by the manufacturer as "OADM Flat Filter, 1 channel DWDM channel 57, 1531.90 Industrial Temperature, Pigtail/Splice-On with East/West Configuration". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.