Fault location in a telecommunications network

H - Electricity – 04 – M

Patent

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Details

H04M 3/30 (2006.01) H04M 3/08 (2006.01)

Patent

CA 2404733

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.

On localise une défectuosité le long d'une ligne de télécommunication entre l'installation terminale du réseau et le central local en mesurant une modification de capacité de la ligne par comparaison de cette capacité à celle des états normaux de fonctionnement. On utilise un système d'information géographique pour représenter graphiquement tous les trajets possibles de la ligne entre l'installation terminale et le central, et on sélectionne le trajet le plus probable en se fondant sur les positions connues des noeuds situés le long de la ligne, tels que les points de distribution montés sur poteau et les coffrets de rue. On représente ensuite graphiquement la distance de la défectuosité le long de la ligne sur le trajet le plus probable de façon à déterminer une localisation de défectuosité précise, laquelle est donnée à un technicien du domaine sous forme de localisation des installations les plus proches ou sous forme de référence grille.

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