... OTDR Fiber BoxesOTDRs require launch and receive test cables to measure the end-to-end loss of ... reflectance of the far-end connection. Noyes OTDR test cables are available in two forms. Fiber Boxes, which ... e.g. ST, SC)y1, y2 — connectors for single-mode cables, specify type (e.g. ST, SC, FC)Other ... By using Fiber Box as both launch and receive cables, as shown in the diagrambelow, you can measure ...