Method and apparatus for switching loop type transmission lines

Details Method and apparatus for switching loop type transmission lines Method and apparatus for switching loop type transmission lines

1982-03-19

1985-03-19

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

H04J 314

Patent

active

045063575

ABSTRACT:
A method of switching transmission lines for a transmission control system in which a plurality of stations are linked with loop type transmission lines having a stand-by transmission line characterized in that each of the stations is operable to switch the active transmission line to the stand-by transmission line in response to the detection of abnormality in the carrier wave and a station transmitting the carrier wave is operable to halt the transmission of the carrier wave on the active transmission line so that the overall transmission line is switched to the stand-by transmission line, thereby minimizing the system down time.

REFERENCES:
patent: 3652798 (1972-03-01), McNeilly et al.
patent: 3859468 (1975-01-01), Smith et al.
patent: 4009469 (1977-02-01), Boudreau et al.
patent: 4119815 (1978-10-01), Frankfort et al.
patent: 4159470 (1979-06-01), Strojny et al.
patent: 4190821 (1980-02-01), Woodward
patent: 4347605 (1982-08-01), Hashizume et al.
patent: 4370744 (1983-01-01), Hirano et al.

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