Using the wrong fiber type in an optical fiber module can result in poor signal quality or even module failure. Solution: It is important to use the correct fiber type for the specific application. Single-mode and multimode fibers have different characteristics and should not be used. Based on typical issues encountered with optical modules in daily switch applications, this document summarizes basic troubleshooting steps for resolving common faults: 1. Check compatibility between the optical module and switch Most switch brands have specific compatibility requirements. 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. Today, SunmaFiber will answer some questions that users often ask. Question 1: What determines the transmission. 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. After an optical module is inserted, the console port displays alarm information.