Fault location apparatus and procedures in CWDM business applications using wavelength selective OTDR

摘要: A method for verifying fiber connections and diagnosing loss of light or signal conditions in a WDM optical system. The utilizes an time domain reflectometer (OTDR) having user-selectable wavelengths to shoot OTDR traces at specified wavelength corresponding data-bearing channel into selected one plurality transmission lines that are connected multiplexer respectively multiplexes data bearing carried on each the onto trunk, demultiplexer demultiplexes multiplexed channels from trunk. receives backscattered line generates trace light, thereby enabling fault location system be determined trace.