Telegraphy – Systems – Printing
Patent
1980-10-07
1982-10-19
Robinson, Thomas A.
Telegraphy
Systems
Printing
178 69G, H04B 346
Patent
active
043552153
ABSTRACT:
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.sub.1 and n.sub.3 with n.sub.3 .noteq.0 and n.sub.3 <n.sub.1 and when n.gtoreq.n.sub.1, transmitting to a first output n-n.sub.2 the pulses received and when n.sub.3 <n<n.sub.1 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 Nn.sub.2 +n.sub.i in which n.sub.i is a number between n.sub.3 and n.sub.1 when a remote control order has to be transmitted to the member occupying rank N on the outward channel.
REFERENCES:
patent: 3764760 (1973-10-01), Marchini
patent: 3864528 (1975-02-01), Heynen
patent: 3976835 (1976-08-01), Larner et al.
patent: 4161634 (1979-07-01), Bellisio
patent: 4161635 (1979-07-01), Wolaver
Busse: "Das Tragerfrequenzsystem MVZ-24 . . . auf . . . Luftkabelanlagen", Frequenz vol. 33, No. 2, 2/79, pp. 43-51.
Camborde et al: "Equipements de ligne pour Systeme . . . a paires Coaxiales", Cables et Transmissions vol. 32, No. 2, Apr. 1978, pp. 278-337.
Legras Jacques
Pyronnet Patrice
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