Line protection switching system in duplexed fiber interface she

Details Line protection switching system in duplexed fiber interface she Line protection switching system in duplexed fiber interface she

1995-08-10

1997-09-02

Olms, Douglas W.

Multiplex communications

Fault recovery

Bypass an inoperative switch or inoperative element of a...

370217, 370219, 370228, 34082501, 340827, H04J 116, H04L 100, H04B 338

Patent

active

056639490

ABSTRACT:
A line protection switching system of a duplexed fiber interface shelf makes easily to reconcile conditions of duplexed fiber interface shelves, which perform line switching by employing APS bytes on an ISDN network. The line protection switching system has a pair of duplexed line switching controllers that send a line switching control signal to switch the transmission lines and a pair of duplexed line interface devices operatively connected to the pair of duplexed line switching controllers. An active interface device of the duplexed interface devices receives the line switching control signal only from an active line switching controller of the duplexed line switching controllers and echoes the received control signal back to the duplexed line switching controllers.

REFERENCES:
patent: 5301184 (1994-04-01), Uriu et al.
patent: 5398236 (1995-03-01), Hemmady et al.
patent: 5436886 (1995-07-01), McGill
patent: 5488606 (1996-01-01), Kakuma et al.

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