Patent ID: 9100118
Filing Date: 2015-08-04
Classification: H04B

Abstract:
1. A transmission device comprising: an optical amplifier configured to amplify an optical main signal to be transmitted on an optical transmission path; a first controller configured to stop output of the optical amplifier and output of an optical monitor signal to be transmitted on the optical transmission path when a failure of the optical transmission path is detected; a second controller configured to be switched from the first controller and configured to operate and stop the output of the optical amplifier and the output of the optical monitor signal when the failure of the optical transmission path is detected; an optical monitor signal transceiver configured to transmit and receive the optical monitor signal including control information; and a switch configured to switch an operation from the first controller to the second controller, based on information of the failure of the optical transmission path based on the states of transmission and reception of the optical monitor signal.