If the optical module is faulty, replace it with the spare part. However, during installation and daily operation, various issues may arise. If the fault is caused by the configuration or environment, advise the customer to optimize the configuration or environment. Dirty Connectors Dirty connectors are one of the most common faults in. 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. Contamination or damage to optical transceivers interfaces can increase signal loss in optical links, resulting in link outages and communication exceptions.