Transmission of communications over electricity distribution networks

摘要

In an electricity distribution and/or power transmission network having one or more nodes at which nodes connection is made between sections of the network, there is input means at a node for coupling on to the network a telecommunication signal carried on a carrier frequency and output means at the node for removing a telecommunication signal from the network, the input and/or the output means being in the form of an add/drop multiplexer, which add/drop multiplexer provides a means of connecting telecommunication signals across the node. <IMAGE>