DDM provides real-time monitoring of the optical module's key parameters, such as temperature, voltage, and optical power. This information is transmitted over the module's I2C bus and can be read using a compatible host device. Digital Diagnostics Monitoring (DDM), also known as Digital Optical Monitoring (DOM) or Diagnostic Monitoring Interface (DMI), is a standardized feature defined by SFF-8472 that allows network devices to monitor real-time optical transceiver parameters such as temperature, voltage, transmit power. Digital Diagnostic Monitoring (DDM), also commonly called Digital Optical Monitoring (DOM), is the standardized capability inside modern optical transceivers that reports the module's internal operating state back to the host system in (near) real time. Below. Diagnose fiber link faults using DDM data. What is DDM? DDM (Digital Diagnostic Monitoring), also known as DOM (Digital Optical Monitoring), is a built-in monitoring feature in SFP, SFP+, and QSFP optical modules.
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