Patent ID: 7801256

Claim:
A method for canceling interbank interference on one or more information carrying signals transmitted over a card, said method comprising the steps of: (a) providing a multiple channel bank having at least two banks of line cards and a common card; (b) each said bank of line cards connected to each other through a common card by a plurality of parallel data wires and a ground path; (c) selecting a reference wire from one of said plurality of data wires to carry a reference signal, said reference wire being separate and distinct from a ground path; (d) transmitting a reference signal over said reference wire; (e) selecting an information carrying signal wire from one of said plurality of data wires, said information carrying signal wire is a wire other than said reference wire; (f) transmitting an information carrying signal over said information carrying signal wire; and (g) using said reference signal transmitted over said reference wire to cancel interference from said information carrying signal transmitted over said information carrying signal wire; further including the step of: (a) subtracting said reference signal transmitted over said reference wire from said information carrying signal transmitted over said information carrying wire to cancel interference from said information carrying signal.