Tag: ODU Signal

OTN – Lesson 10 – Handling Defects at the ODU-Layer – Defect Scenario Video

In this video, we presume that some ODUk- (or OTUk-) Layer circuitry is declaring a certain defect condition. We then determine how ODU-layer circuitry is expected to respond.

OTN – Lesson 10 – Handling Defects at the ODU-Layer – Defect Scenario for Multiplexed and Non-Multiplexed Applications

This video summarizes the various defects that OTN circuitry can declare/clear at the ODU-Layer.  

This video also describes how ODU-Layer circuitry is expected to respond to each ODU-Layer (or upstream OTU-Layer) defect.  

  • Should it transmit PM-BDI (Path Monitoring – Backward Defect Indicator) upstream?
  • Should it replace the under-lying 100oBASE-X or 100GBASE-R client signal with the Link or Local Fault Indicator?  

This video answers these questions and more.  

NOTE:  This video covers both Non-Multiplexed and Multiplexed Applications.

Continue reading “OTN – Lesson 10 – Handling Defects at the ODU-Layer – Defect Scenario Video”

OTN – Lesson 10 – Video 5M – Conclusion of the ODUkP/ODUj-21_A_Sk Function

This post presents the 5th of the 6 Videos that covers training on the Peformance Monitoring of the ODUk Layer (for Multiplexed Applications). This post focuses on the Sink Direction ODU-Layer Atomic Functions.

OTN – Lesson 10 – Video 5M – Conclusion of the ODUkP/ODUj-21_A_Sk Atomic Function

This blog post includes a video that continues our discussion of the ODUkP/ODUj-21_A_Sk Atomic Function.  

In this case, we will start talking about defects that this function declares within the Lower-Speed ODUj Tributary Signals, which demultiplexes and demaps from the incoming ODUk Server Signal.

These defects include:

  • dMSIM[p] – Multiplex Structure Identifier Mismatch – for each ODUj Tributary Port signal, p, and
  • dLOFLOM[p] – Loss of Frame, Loss of Multi-Frame Defect (again) for each ODUj Tributary Port signal, p.  

NOTE:  We describe how the ODUkP/ODUj-21_A_Sk function declares and clears the dLOFLOM defect condition as we walk through the dLOFLOM/In-Frame State Machine Diagram.  

Afterward, we discuss:

  • Defect Correlation Equations and Analysis, and
  • Consequent Equation Analysis

Finally, we wrap up and summarize the ODUkP/ODUj-21_A_Sk Function.

Continue reading “OTN – Lesson 10 – Video 5M – Conclusion of the ODUkP/ODUj-21_A_Sk Function”