A method for determining an identity of an entity responsible for billing a called party of an alternatively billed telephone call is disclosed. A plurality of N input transmission line sections are connected in series, with inputs of the 1 through N amplifier sections interconnected at their inputs along the series of input transmission line sections. Further included is a drum, a distributor and a lower base section which expands radially, and on which lower base section are one or more distributor channels. All of the preceding steps are repeated throughout the journey of the aircraft.