... reflectance of the far-end connection. Noyes OTDR test cables are available in two forms. Fiber Boxes, which ... , SMF-281000 m (3281 ft) x1, x2 — connectors for multimode cables, specify type (e.g. ST, SC)y1, y2 ... — connectors for single-mode cables, specify type (e.g. ST, SC, FC ... By using Fiber Box as both launch and receive cables, as shown in the diagrambelow, you can measure ...