REMOTE CONTROL SYSTEMS FOR TELECOMMUNICATIONS LINKS

摘要

A remote control system for a telecommunications link between two stations, one being a monitoring station and the other a monitored station , interconnected by an outward channel and a return channel, said channels having a plurality of signal regenerating member pairs. The monitoring station comprises means for transmitting by a low frequency channel and in the outward direction a sequence of P pulses, a control circuit being placed in each pair of regenerating members and comprising means for detecting the pulses received, for counting the number N of said pulses, for comparing this number with two predetermined numbers n and n3 with n3 ? O and n3 < nl and when n ? nl, transmitting to a first output n- n2 the pulses received and when n3 < n < nl transmitting to a second output the control order and transmitting no pulse to the first output, the number p of pulses transmitted by the monitoring station being selected equal to Nn2 + ni in which ni is a number between n3 and nl when a remote control order has to be transmitted to the member occupying rank n on the outward channel.