Loop transmission system

Details Loop transmission system Loop transmission system

1982-03-08

1984-03-06

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

34082505, 370 15, 371 22, H04Q 900, G06F 1100

Patent

active

044357044

ABSTRACT:
A loop transmission system including a plurality of stations connected in series in a looped transmission line to transfer data among the stations, wherein the stations include a supervising station and at least one terminal station and the transmission line is duplicated so that when a fault occurs in currently used one of the transmission lines, the other transmission line which has been used as a spare is used for transmission of data, while the supervising station sends out a specific signal to the spare transmission line and the terminal stations each determines one of the transmission lines through which the specific signal is detected, as the spare.

REFERENCES:
patent: 4159470 (1979-06-01), Strojny et al.
patent: 4271511 (1981-06-01), Manber et al.
patent: 4271513 (1981-06-01), Maejima et al.
patent: 4317010 (1982-02-01), Fillot
patent: 4320508 (1982-03-01), Takezoe
patent: 4352103 (1982-09-01), Slater

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