What is the Sandstone FC1R-D40-5920-LCUI0Q?
The Sandstone FC1R-D40-5920-LCUI0Q is a network/telecom equipment component, listed by the manufacturer as "Combination Mux/DeMux 19" 1RU Filter, 40 channel DWDM Chxx Industrial Temperature, LC/UPC, 59-20 (1530.33 to 1561.42) Dual fiber". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.