An interface for a bulkhead monitor in an in-flight entertainment system, and a method for using the same. More specifically, a one-wire interface use to electrically couple a tapping unit and its associated monitor in an in-flight entertainment system. The wire has a first end for coupling to an input of a comparator in the tapping unit, and a second end for coupling to an input of a comparator in the monitor, to couple the tapping unit to the monitor. The interface further includes a second wire for coupling the wire to a load, such as an indicator which indicates an on or off condition of at least the video monitor. The wire of the interface can also carry a signal indicating a indicating at least one of transmitting state and a receiving state of a microcontroller of the monitor.