Detecting faults in subscriber telephone lines

Details Detecting faults in subscriber telephone lines Detecting faults in subscriber telephone lines

2005-05-31

2005-05-31

Barnie, Rexford (Department: 2643)

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Of data transmission

C379S001040, C379S024000, C379S022030

Reexamination Certificate

active

06901137

ABSTRACT:
A method tests a subscriber line. The method includes providing a classifier to predict a performance characteristic of the line based at least in part on a value of an auxiliary variable. Each value of the auxiliary variable represents a property of the line. The method also includes performing electrical measurements on the subscriber line, using the measurements to predict a value of the auxiliary variable, and predicting the performance characteristic of the line. The act of predicting the characteristic applies the classifier to the predicted value of auxiliary variable.

REFERENCES:
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patent: 6084946 (2000-07-01), Beierle
patent: 6091713 (2000-07-01), Lechleider et al.
patent: 6266395 (2001-07-01), Liu et al.
patent: 6285653 (2001-09-01), Koeman et al.
patent: 6292539 (2001-09-01), Eichen et al.
patent: 6487241 (2002-11-01), Cole

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