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Simple words to understand OTDR

2021-01-20

Optical Time Domain Reflectometer is a device used to detect failures in fiber optic links in a communications network. The operation of the device involves the production and transmission of a series of high-speed optical pulses within the fiber. Changes within the fiber create a back scatter according to the Rayleigh distribution. The pulses are then returned to the ODTR where their intensity is measured. The signal strength returned is an indication of the location and severity of the failure. ODTR is used not only for maintenance but also for installation of optical communication lines. In addition, international telephony networks also use ODTR to improve line connections.

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