Abstract: A communications wiring system includes a communications network interface device for routing a plurality of source signals between respective ones of a plurality of types of electrical sources and a number of reconfigurable outlet assemblies. Each reconfigurable outlet assembly selectively establishes electrical connection with predetermined ones of the electrical sources, via a cable. The communications network interface device receives and splits the source signals into a predetermined number of subsignals which are routed to respective reconfigurable outlet assemblies. Each reconfigurable outlet assembly includes an outlet and a number of interchangeable electrical connectors, such as modular jacks, adapted to be removably mounted to the outlet for establishing electrical connection with a predetermined electrical source. In order to establish electrical connection with a different electrical source, a first electrical connector can be removed and a second electrical connector can be inserted therein.