An AC/DC power device for AC/DC power line communication is provided. An AC/DC protection circuit coupled to an AC/DC power line is able to receive an AC or DC power. An AC/DC configuration circuit coupled to the AC/DC protection circuit is used to switch between an AC mode and a DC mode PLC. An AC/DC...http://www.google.fr/patents/US7839618?utm_source=gb-gplus-shareBrevet US7839618 - AC/DC power line communication modem