The application of this method is an addressable lighting control system using the In Seat Power Supply as an interface between the passenger control device for lighting and the aircraft Cabin Services System. On wide body aircraft, there does not exist a system to control the reading and attendant call lights without installing a complete In Flight Entertainment system. This is a part of the system used to communicate from a passenger interface to the lighting system based on location of the passenger in the aircraft. This invention decreases the weight and complexity of other communication and addressing schemes used on-board aircraft as well as obviating the need for termination plugs or jumpers at the end of the multi-drop communication line.