Many new customers will encounter the same problem, which is that when they first receive the optical module, it looks brand new and they don't know how to query the parameter information of the optical module. Below, Xinrui Technology will introduce how to use the display command to view the DDM information of the interface optical module.

To query and understand the DDM information of the optical module on the switch, you can follow the following steps:

Execute query command: Use specific commands to query the optical module information on the device interface. For Huawei switches, you can use the command display receiver [interface type interface number | slot id] [verbose] to view optical module information. This command can display the type, serial number, production date, manufacturer information, power, temperature and other parameters of the optical module.

Understanding DDM parameters: DDM (Digital Diagnostic Monitoring) parameters are a series of parameters provided by the internal microcontroller of the optical module to monitor the status and performance of the optical module. These parameters include:

Temperature: The working temperature of the optical module is an important monitoring indicator, and high or low temperatures can affect the performance and lifespan of the optical module.

Voltage: The working voltage of the optical module is also an important monitoring indicator, and a stable voltage can The normal operation of the optical module.

Transmission power: refers to the strength of the optical signal sent by the optical module, which can reflect the transmission performance of the optical module.

Receiving power: refers to the intensity of the optical signal received by the optical module, which can reflect the receiving performance of the optical module.

View diagnostic parameters: In addition to basic optical module information, the command display receiver diagnosis interface [interface type interface number] can also be used to display the diagnostic parameters of the optical module. These parameters may include more detailed performance data, error counts, etc., which can help further understand the working status of the optical module.

Interpretation and response to the problem: Based on the DDM information found, the network administrator can determine whether the optical module is working properly and whether adjustments or replacements are needed. For example, if temperature or voltage abnormalities are found, it may be necessary to adjust the working environment or power supply equipment; If a decrease in transmission or reception power is found, it may be necessary to clean or replace the optical module.

Please note that specific query commands and parameters may vary depending on the type of switch and optical module. Therefore, in practical operation, it is recommended to refer to the relevant equipment's documentation or manual for the most accurate information. Meanwhile, for users who are not familiar with optical modules and DDM, it is recommended to consult a professional network administrator or technical support personnel before proceeding with the operation.