Method and apparatus for performing impedance measurements on a

Details Method and apparatus for performing impedance measurements on a Method and apparatus for performing impedance measurements on a

1995-06-06

1997-08-26

Kuntz, Curtis

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Including fault responsive disconnection of tested component

379 29, 379 30, H04M 124, H04M 322

Patent

active

056617763

ABSTRACT:
A network termination unit for connection to a telephone line at a predetermined demarcation point for sequentially simulating a plurality of fault conditions to allow a diagnostic routine to be performed on the telephone line at a remote location from the demarcation point. The network termination unit comprises a plurality of semi-conductor switches electrically connected to conductors of the telephone line to establish a network of electrical paths capable of altering the electrical condition of the telephone line when caused to assume a state of conduction. A logic module causes the switches to assume either a closed or an opened condition in accordance with a predetermined sequence established by a hard-wired program.

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patent: 5073919 (1991-12-01), Hagensick
patent: 5195124 (1993-03-01), Ishioka
patent: 5222119 (1993-06-01), Asano
patent: 5402073 (1995-03-01), Ross

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