A network, in particular in a motor vehicle, wherein the network includes a central subscriber and at least one first subscriber, wherein the central subscriber and the at least one first subscriber are interconnected by way of at least one first cable. The central subscriber has at least one signal coupling unit and at least one energy coupling unit, wherein by way of the signal coupling unit an AC voltage can be impressed on at least one first line of the first cable, or can be tapped from the signal coupling unit. Also disclosed is a method for operating a network.