Foreign potential checker

Details Foreign potential checker Foreign potential checker

H - Electricity

04

M

379/2, 324/58.02

H04M 3/26 (2006.01) H04B 3/46 (2006.01)

Patent

CA 1064631

ABSTRACT OF THE DISCLOSURE The disclosure relates to a monitoring system and method for determining the magnitude of the equiva- lent voltage source impedance and the magnitude of the equivalent voltage source voltage on a telephone line and switching network of a telephone system. The monitoring system measures the Thevenin source voltage and source impedance to ground on the line by applying two independant voltage conditions to the line and senses the resulting steady state voltages thereby produced in a sensing resistor. The magnitudes of the sensed steady state voltage are thereafter utilized for obtaining the Thevenin source voltage and source impedance magnitudes.

268555

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