A process for reducing common-mode current in a power-line communication equipment, where a power-line network is used as a communication medium, includes applying a signal transmitted by the power-line communication equipment via a common-mode choke circuit. The common-mode choke circuit includes braided signal cables mounted around a toroidal magnetic core. The signal is applied to the braided signal cables. The common-mode choke circuit is located adjacent to a connector of a power supply cable supplying power from a power outlet to the power-line communication equipment.