A method of mapping addresses of a plurality of refrigerated containers having remote monitoring units (RMUs) connected to a power line carrier based monitoring system which includes a master monitoring unit (MMU). The method adapts to the size of the expected number of containers to be mapped by any...http://www.google.de/patents/US4896277?utm_source=gb-gplus-sharePatent US4896277 - Method of mapping refrigerated containers in a power line carrier based monitoring system