Patent ID: 6694016
Filing Date: 2004-02-17
Classification: H04L,H04M

Abstract:
A reversible odd-order low-pass filter for insertion between a POTS device and a home telephone wiring network to separate certain high frequency signals on the home telephone wiring network from the POTS device, comprising:a first pair of inductors, each inductor having an inductance in the range of 5-15 mH; a second pair of inductors, each inductor having an inductance in the range of 5-15 mH; a capacitor disposed between the first and the second pairs inductors and separated from the home telephone wiring network by either the first or the second pair of inductors to prevent high frequency signals from being shorted across the capacitor regardless of whether the home telephone wiring network is coupled to the filter adjacent to the first or the second pair of inductors, wherein an interwinding capacitance value of the first and the second pair of inductors is selected to create a frequency response of the low pass filter approximately resembling that of a higher order Chebyshev function.