Importance

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Abstract

A computer controlled wire center unit for a remote monitoring and control system is disclosed. The system includes an operations console at a central control point, a wire center unit remote from the operations console, and a plurality of switching units in the area to be remotely monitored and controlled from the central control point. Each switching unit is connected to the wire center by a wire pair, and a communications path extends between the wire center and the central control point. The modular wire center unit comprises a plurality of interconnected modules including a line select module, a line switch decoder module, a communications module, and a programmable digital microcomputer for controlling operations of the wire center unit modules in accordance with a series of prestored instructions including: periodic scanning of all switching units, signalling the operations console of any detected change in status of any switching unit, testing of tip and ring order of connection of each wire pair to each switching unit and reversing the order of connection of a wire pair in the event that improper order of connection is detected, and other automatic functions.

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First Claim