Fault detection method and apparatus for telephone lines

Details Fault detection method and apparatus for telephone lines Fault detection method and apparatus for telephone lines

2003-03-27

2008-10-21

Tran, Quoc D (Department: 2614)

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Of data transmission

C379S024000, C379S027010, C379S029090

Reexamination Certificate

active

07440552

ABSTRACT:
A method and apparatus for detecting faults on a telephone line, the method comprising: comparing measured characteristics of the line with a model, said model modeling expected characteristics of the telephone line; and in response to the comparison, generating a fault alert signal if the comparison between the measured characteristics and the modeled expected characteristics differ by more than a pre-determined threshold, wherein said characteristics comprise characteristics relating to the transmission of data on the line within a plurality of predetermined frequency bands

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patent: 6487276 (2002-11-01), Rosen et al.
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patent: 7359330 (2008-04-01), Lunt et al.
patent: 2003/0063712 (2003-04-01), Chattell et al.
patent: 2 297 871 (2001-08-01), None
patent: WO 00 64130 (2000-10-01), None
patent: WO 02 05529 (2002-01-01), None

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