If the optical module is faulty, replace it. Check whether the optical modules . Based on typical issues encountered with optical modules in daily switch applications, this document summarizes basic troubleshooting steps for resolving common faults: 1. However, during installation and daily operation, various issues may arise. This article. 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. We are experiencing issues with our optical ports between. If the fault is caused by incorrect configuration or networking environment, change the configuration or networking environment.