Pulse or digital communications – Repeaters – Testing
Patent
1988-09-07
1989-10-03
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
178 71R, 178 71T, H04B 717
Patent
active
048721832
ABSTRACT:
A data transmission apparatus including remote repeater lines comprising the first and second remote repeaters, each respectively providing first receiver and driver which receive the one signal of the signals of first and second transmission buses and output the signal to the other side, second receiver and driver which receive the other signal and output the signal to the one side, first and second carrier detecting circuits which respectively detect the carriers of respective signals, a decision circuit which inputs such detected outputs and decides which one of first and second receivers has operated first and first and second AND circuits the one of which respectively opens and the other closes depending on output of the decision circuit, and the cables which connect in direct such first and second remote repeaters to link said first and second transmission buses; in which n (n is a positive integer of 2 or larger) remote repeater lines are connected in parallel between said first and second transmission buses and the decision control elements which decide the remote repeaters having higher priority do not operate normally and sequentially exchanges the remote repeaters to those having lower priority are provided respectively to said n first and second remote repeaters.
REFERENCES:
patent: 3739098 (1973-06-01), Camiciottoli et al.
patent: 4052670 (1977-10-01), Watanabe et al.
patent: 4606049 (1986-08-01), Daniel
patent: 4607376 (1986-08-01), Sasaki
patent: 4633464 (1986-12-01), Anderson
patent: 4700342 (1987-10-01), Egami
patent: 4796278 (1989-01-01), Naka
Chin Stephen
Mitsubishi Denki & Kabushiki Kaisha
Safourek Benedict V.
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