entrance security - and control system in the case of a period of time in many cases - coupling system

摘要

A supervisory and control system for a time division switching system supervising and controlling signals transferring to and from all or some of line interface equipment such as a digital trunk, analog trunk equipment, the intra-office line concentrators or remote line concentrator through a signal path. In the signal control, the signal is classified into two kinds of signals: one for cyclically controlling a state and the other for randomly controlling the same. Those signals are multiplexed in a single time slot to control the various line interfaces. Signal time slots having different multiframes and signal time slots with a plurality of periods are supervised depending on a signal path class thereby to reduce the number of laying cables among interframes.