Alarm suppression method of optical transmission device

摘要

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synchronous digital hierarchy (SDH) optical transmission device. The present invention relates to a synchronous digital hierarchy (SDH) optical transmission device. A first step of suppressing the first derived alarm generated by the core alarm in one case; A second step of determining a shape of a network element when the generated key alarm after the first step is an optical path currently in operation; A third process of suppressing the second derivative alarm generated by the core alarm according to the shape of the network element determined by the second process; a second suppressing third derivative alarm generated by the second derivative alarm It provides an alarm suppression method of a four-stage optical transmission device.