Digital Optical Monitoring (DOM) is a feature that allows for the real-time monitoring of various physical and operational parameters of fiber optic transceivers, such as transmit power, receive power, temperature, laser bias current, and voltage. DOM is supported on MS120, MS125, MS130, MS210. Starting with Cisco NX-OS Release 10. 6(1)F, you can use versatile diagnostics monitoring (VDM) to monitor pluggable optical modules on the Cisco N9364E-SG2-Q switches. This capability provides real-time access to vital operating parameters within optical transceivers, allowing network operators and engineers to. 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. This interface provides real-time feedback on the health and performance of optical transceivers, empowering network administrators to proactively address issues before they impact operations. In this tutorial, we will explore what the DDMI is, its key parameters, how to interpret its metrics, and.