Method and apparatus for alarm surveillance for an optical trans

Details Method and apparatus for alarm surveillance for an optical trans Method and apparatus for alarm surveillance for an optical trans

1993-06-23

1995-08-08

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359110, H04B 1008

Patent

active

054404185

ABSTRACT:
Each optical repeater in an optical transmission system includes an optical amplifier, and a control circuit for controlling the optical transmission. Furthermore, each optical repeater transmits management information to the next optical repeater. The control circuit checks the status of the optical amplifier and obtains monitoring information. The control circuit generates management information in accordance with the monitoring information and the management information transmitted from the upstream side optical repeater. The management information is converted to an optical signal and transmitted to the next optical repeater. A receiving station receives the management information. The management information includes an ID code for an optical repeater which has failed and the status of the failure. Different categories of management information have priorities which can be changed by the receiving station, and thus the receiving station can detect the status of the optical transmission line easily and flexibly.

REFERENCES:
patent: 4211920 (1980-07-01), Wakabayashi
patent: 5260819 (1993-11-01), Hadjifotiou
patent: 5274496 (1993-12-01), Fujiwara
patent: 5282074 (1994-01-01), Miyazaki
patent: 5293260 (1994-03-01), Kikawa
patent: 5296957 (1994-03-01), Takahashi

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