H3C optical modules do not support viewing power

H3C optical modules may not support viewing optical power if the module is non-H3C, lacks digital diagnostic monitoring (DDM), or the device software does not support the feature.Reasons Optical Power Cannot Be ViewedNon-H3C or Third-Party Modules H3C devices often restrict full functionality to certified H3C transceivers. If a third-party or non-H3C module is installed, the device may not display optical power or other diagnostic information. The system log may indicate that the transceiver is not H3C-compliant, and H3C does not guarantee normal operation for such modules .Device or Software Limitations Some H3C switches or routers may not support reading optical power for certain module types or firmware versions. Checking the device's release notes or installation guide can confirm whether the current software version supports the installed transceiver .Lack of Digital Diagnostic Monitoring (DDM) Optical modules must support DDM (also called DOM) to report transmit and receive power. Modules without DDM cannot provide optical power readings, even if physically compatible with the interface .Hardware or Interface Issues Faulty optical interfaces, mismatched rates, or damaged connectors can prevent the device from reading module information. Ensuring the interface is operational and compatible with the module is essential .How to Verify and TroubleshootCheck Module Vendor: Use the command display transceiver interface to verify the Vendor Name field. Only H3C-certified modules reliably support power monitoring .View Module Status: Run show interface to check link state, module type, and statistics. This confirms whether the module is recognized and operational .Diagnostic Commands: On supported devices, commands like display hardware internal transceiver register interface or display transceiver information interface in probe view can collect detailed module data .RecommendationsUse H3C-certified optical modules to ensure full functionality, including optical power monitoring.Upgrade the device firmware if the current version does not support the installed module.Avoid third-party modules if optical power monitoring is required, as non-certified modules may not comply with H3C's DDM standards . By following these steps, you can determine whether the inability to view optical power is due to module compatibility, device limitations, or hardware issues.