Order-wire signal handling apparatus

Details Order-wire signal handling apparatus Order-wire signal handling apparatus

1996-12-27

2000-01-04

Horabik, Michael

Multiplex communications

Fault recovery

Bypass an inoperative channel

370225, 370223, 370505, 370506, 375106, 375107, G01R 3108, G06F 1100, G08C 1500, H04L 700

Patent

active

060117745

ABSTRACT:
An apparatus for processing an order-wire signal capable of providing a high quality communication between operators through an order-wire channel for use in a synchronous add drop multiplexer(ADM) including a multiplexing unit and a de-multiplexing unit comprises: mixer for mixing two signals to generate a mixed signal, one being a voice signal of an operator at the ADM, the other being an order-wire signal received from a de-multiplexing unit in the ADM; detector for detecting a slip to generate a control signal and generating slip data; and selector for selecting one out of the mixed signal and the received order-wire signal to produce a selected signal, and transmitting the selected signal to the multiplexing unit in the ADM.

REFERENCES:
patent: 4727541 (1988-02-01), Mori et al.
patent: 4815109 (1989-03-01), Kao
patent: 5278824 (1994-01-01), Kremer
patent: 5790520 (1998-08-01), Iwamoto et al.

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