Open loop system for transmitting digital information

Details Open loop system for transmitting digital information Open loop system for transmitting digital information

1977-03-24

1978-10-10

Olms, Douglas W.

179 15BA, H04J 600

Patent

active

041198042

ABSTRACT:
A plurality of subscriber stations is connected to one or more PCM multiplex lines of a PCM switching network via a unidirectional loop and a transfer station. The subscriber stations are series connected to the loop on which addressed telegrams circulate originating and ending at the transfer station. The subscriber stations receive the telegrams addressed to them and exchange them for transmission to the transfer station. The transfer station transmits a time-slot received on the PCM line as an addressed telegram and vice-versa. For enhancing reliability all subscribers can be connected via a second loop and a second transfer station to one or more further PCM lines.

REFERENCES:
patent: 3883693 (1975-05-01), Moore
patent: 3891804 (1975-06-01), Hachenburg
patent: 3906153 (1975-09-01), Polischuk-Sawtschenko
patent: 3979733 (1976-09-01), Fraser
patent: 4009469 (1977-02-01), Boudreau et al.

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