Transmission line switching system

Details Transmission line switching system Transmission line switching system

1989-02-02

1991-04-23

Smith, Jerry

Excavating

34082501, 34082503, 370 16, 455 8, G06F 1120

Patent

active

050105507

ABSTRACT:
A transmission line switching system includes transmission terminal matrix switches, reception terminal matrix switches and monitor circuits. Switching to and returning of the switching from any of the standby transmission lines are performed by connection of each of the matrix switches. An output from a control signal transmitter is connected to switching destination and switching returning destination transmission lines via the transmission matrix switch before the switching and returning of the switching, and control signals supplied through the transmission lines are received by a control signal receiver via the monitor circuit, thereby checking normality of the transmission lines.

REFERENCES:
patent: 3111624 (1963-11-01), Farkas
patent: 3681694 (1972-08-01), Sarati
patent: 4365247 (1982-12-01), Bargeton
patent: 4365248 (1982-12-01), Bargeton
patent: 4442518 (1984-04-01), Morimoto
patent: 4633473 (1986-12-01), Ratchford
patent: 4680776 (1987-06-01), Ikeuchi
"Computer Aided Digital Transmission Protection Switching System" by Yasuyuki Suzuki, Japan Telecommunications Review, vol. 25, No. 1, Jan., 1983, pp. 39-48.

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