Optical time domain reflectometry (OTDR) is a proven technology for monitoring physical network structures. A single fibre in the cable suffices for monitoring. The Rayleigh scattering of light pulses is evaluated in order to detect and locate faults and impurities in optical fibres. In this way, extended networks can also be monitored around the clock. In the event of a fault, it can be rectified in the shortest possible time. Manufacturers such as TEMPO Communications offer a range of test equipment for company level as well as large scale telecommunications networks.
