Patent ID: 7433412

Claim:
A digital subscriber line (DSL) circuit, comprising: at least one transformer exciting network (TEN) adapted to supply a low-impedance path to ground in response to an excitation current, wherein the excitation current has a non-DSL frequency, and wherein the low-impedance path to ground allows the excitation current to flow through a DSL induction neutralizing transformer (INT); wherein the DSL INT is electrically coupled to the at least one TEN, the DSL INT adapted to add longitudinal inductance to a telecommunication line in response to the excitation current, wherein the longitudinal inductance suppresses induced harmonic currents and wherein the DSL INT includes: a coil electrically coupled to and wound around a core, the coil including approximately 100-200 feet of approximately 24 gauge wire; wherein the core and the coil are adapted to add the longitudinal inductance to the telecommunication line; and wherein the DSL INT does not include a screen or shield to prevent crosstalk interference.