Run the following command to view device board information and identification details of all optical modules: show inventory The output includes the module type, serial number, Cisco-compatible part number, and other details, which are retrieved from the pre-programmed data in. Run the following command to view device board information and identification details of all optical modules: show inventory The output includes the module type, serial number, Cisco-compatible part number, and other details, which are retrieved from the pre-programmed data in. When optical modules operate on a switch, it is usually necessary to read the module's internal information to understand its working status—such as connection status and real-time metrics like optical power and temperature. Additionally, identifying module information helps detect coding. The PON system parameters allow you to to configure and manage the PON system. It is mainly used to query the alarm monitoring of GPON optical module. This guide provides complete, step-by-step CLI commands to view module type, DOM/DDM diagnostic data, vendor details, and compatibility information, fully compliant with Cisco IOS and IOS-XE command standards. The five parameters have basically decided whether the optical module can work normally. If you know the model or type of an optical module, you can view the section "Pluggable Modules for Interfaces" in the Hardware Description to look up parameters of the optical module, including the center wavelength, transmission distance, fiber types supported, receive optical power, and transmit.