Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of centralized switching system
Reexamination Certificate
2005-09-27
2005-09-27
Tran, Quoc (Department: 2643)
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
Of centralized switching system
C379S001010, C379S015050, C379S016000, C379S022030
Reexamination Certificate
active
06950497
ABSTRACT:
A fault is located along a telecommunications line between the network terminating equipment and the local exchange by measuring a change in the capacitance of the line when compared with the capacitance under normal operating conditions. A geographical information system is used to plot all possible routes for the line between the terminating equipment and the exchange, and the most probable route is selected based on the known positions of nodes along the line, such as pole mounted distribution points and streetside cabinets. The distance of the fault along the line is then plotted along the most probable route to determine an accurate fault location, which is given to a field technician as the location of the nearest premises or a grid reference.
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Chattell Andrew D
Drury Ian R
Logan Hilary P
Lowndes Geoffrey R
Lunt Nicholas
British Telecommunications public limited company
Nixon & Vanderhye P.C.
Tran Quoc
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