When the optical port of the optical module is frequently up or down, first confirm whether the optical module is abnormal, you can check the optical module alarm information to troubleshoot the optical module at both ends and connect the optical fiber; for the. When the optical port of the optical module is frequently up or down, first confirm whether the optical module is abnormal, you can check the optical module alarm information to troubleshoot the optical module at both ends and connect the optical fiber; for the. Check the model of the faulty optical module. If it is not a Huawei-certified optical module, replace it with a Huawei-certified optical module. If the optical module is installed on a GE port, run the display interfaceGigabitEthernet x/x/x command to view port information when the optical module. An optical module is a critical component in modern optical communication systems, directly affecting transmission stability, network reliability, and operational efficiency. However, during installation and daily operation, various issues may arise. Therefore, understanding common optical module. Customers in the use of optical modules will more or less encounter a variety of failure problems, such as optical module model selection is correct, the use of jumper is correct and some common problems, customers have the ability to judge and have a clear solution, but for some of the use of. Based on typical issues encountered with optical modules in daily switch applications, this document summarizes basic troubleshooting steps for resolving common faults: 1. 165a on 12v power supply, but no image is displayed. When selecting the DLP Logo as the display source, DMD does have the image although it is not projected.