Telephone subscriber loop test system

Details Telephone subscriber loop test system Telephone subscriber loop test system

H - Electricity

04

Q

379/2

H04Q 1/20 (2006.01) H03K 17/725 (2006.01) H04M 1/24 (2006.01) H04M 3/26 (2006.01) H04M 3/30 (2006.01)

Patent

CA 1307862

Abstract of the Disclosure A method of locating faults in a telephone system including the steps of connecting antiparallel rectifying switches (ARS's) that inhibit alternating current (A.C.) flow in one direction but not the other between subscriber equipment and respective telephone company lines, applying an A.C. test signal to a telephone company line and measuring a resulting signal, and determining whether a fault is on the telephone company line or customer equipment based upon the resulting signal. Also disclosed is an ARS that includes a first input and output, a second input and output, and paths between respective inputs and outputs providing low turn-on thresholds in one direction between respective inputs and outputs and high turn-on thresholds in the other direction, the directions of low and high being the same for both sets of inputs and outputs.

601755

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