Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of centralized switching system
Reexamination Certificate
2006-04-04
2006-04-04
Nguyen, Duc (Department: 2643)
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
Of centralized switching system
C379S022020, C379S022030, C379S022040
Reexamination Certificate
active
07023963
ABSTRACT:
A digital subscriber loop line card-installed mechanism conducts parametric measurements on the wireline to which the line card is connected, and adjusts taps of an echo cancellation operator in accordance with the response of the wireline to an electrical stimulus imparted to the wireline. The echo canceler tap coefficients are then processed to determine the location of a fault, such as a short circuit, open-circuit and the like, on the wireline. Fault information measurement data is then reported to a supervisory control location, which dispatches the appropriate technician to resolve the cause of the problem.
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Chu Fred T.
McMahan Dennis B.
Owen James Ernest
Tidwell Bradley Dwayne
Adtran Inc.
Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
Nguyen Duc
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