Loop status verification system

Abstract From the Canadian patent

A system is disclosed for verifying the integrity of each one of a number of communication paths illustratively telephone subscriber loops that runs between, a near end location illustratively a telephone company, central office and corresponding remote ("far end"), location(s). This system utilizes circuitry such as a line, verification module, that is located at the far end of each such path to impart a selected test signal thereto. In one embodiment, the circuitry detects one or more conditions thereat (e.g. loop current and loop voltage) that are indicative of normal operation of the path e.g. proper, on-hook and off-hook conditions. As long as the path is normally operating at the far …