Method and apparatus for alarm surveillance for an optical transmission system
First Claim
1. A method for operating a first optical repeater apparatus disposed between an input optical fiber and an output optical fiber, the first optical repeater apparatus including a first optical amplifier means for amplifying a main signal received on the input fiber and transmitting the amplified main signal on the output fiber, the first optical amplifier means having a status, the first optical repeater apparatus additionally including first managing means for generating management information, the first managing means having a status, said method comprising the steps of:
- (a) receiving a management signal on the input fiber from a second optical repeater apparatus;
(b) examining the status of the first managing means;
(c) examining the status of the first optical amplifier means if the status of the first managing means is normal, and;
(d) forwarding the management signal received in step (a) by emitting the received management signal on the output fiber if the status of the first managing means is normal and the status of the first optical amplifier means is normal.
1 Assignment
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Accused Products
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.
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Citations
7 Claims
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1. A method for operating a first optical repeater apparatus disposed between an input optical fiber and an output optical fiber, the first optical repeater apparatus including a first optical amplifier means for amplifying a main signal received on the input fiber and transmitting the amplified main signal on the output fiber, the first optical amplifier means having a status, the first optical repeater apparatus additionally including first managing means for generating management information, the first managing means having a status, said method comprising the steps of:
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(a) receiving a management signal on the input fiber from a second optical repeater apparatus; (b) examining the status of the first managing means; (c) examining the status of the first optical amplifier means if the status of the first managing means is normal, and; (d) forwarding the management signal received in step (a) by emitting the received management signal on the output fiber if the status of the first managing means is normal and the status of the first optical amplifier means is normal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification