OTN – Lesson 12 – APS Features within Atomic Functions – Part 1

This blog post presents a video that discusses the APS features within some of the Atomic Functions that we discussed in Lessons 9 and 10.

Lesson 12 – Video 12 – Detailed Implementation of APS within the Atomic Functions – Video 1

This blog post starts our discussion of the APS Features within various Atomic Functions. In this case, we will present how to implement Automatic Protection Switching in great detail. In particular, we will describe the following:

APS Features within the OTUk/ODUk_A_So and OTUk/ODUk_A_Sk functions (OTU-Layer/SNC/I Monitoring)
- How do we implement the APS features within these Atomic Functions to support OTU-Layered SNC/I Monitoring and Protection-Switching?
- How do we implement a complete System-Level design (using these atomic functions along with the OTUk_TT_So and OTUk_TT_Sk Atomic Functions)?
  - NOTE: We discussed these atomic functions in Lesson 9. However, we did not discuss the APS features (within those functions) then.
APS Features within the ODUkP/ODUj-21_A_So and ODUkP/ODUj-21_A_Sk functions (ODU-Layer/SNC/I Monitoring)
- How do we implement the APS features within these Atomic Functions to support ODU-Layered SNC/I Monitoring and Protection-Switching?
- How do we implement a complete System-Level design (using these atomic functions along with the ODUk_TT_So and ODUk_TT_Sk Atomic Functions)?
  - NOTE: We discussed these atomic functions in Lesson 10. However, we did not discuss the APS features (within those functions) then.
APS Features of the ODUkP/ODUj-21_A_So and ODUkP/ODUj-21_A_Sk functions (CL-SNCG/I Monitoring)
How do we implement the APS features within these Atomic Functions to support CL-SNCG/I Monitoring and Protection-Switching?
How do we implement a complete System-Level design (using these atomic functions along with the ODUk_TT_So and ODUk_TT_Sk Atomic Functions)?
- NOTE: We discussed these atomic functions in Lesson 10. However, we did not discuss the APS features (within those functions) then.

Check Out the Video Below

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OTN – Lesson 12 – Detailed Discussion of SNC/I Monitoring (Protection Switching)

This blog post presents a video that describes (in detail) SNC/I (Subnetwork Circuit – Inherent) Monitoring for Protection Switching.

Lesson 12 – Video 4 – Detailed Discussion of SNC/I (Subnetwork Circuit – Inherent) Monitoring for Protection Switching

This blog post contains a video that presents a detailed discussion of SNC/I Monitoring, both at the OTU and ODU layers.

In particular, this video will discuss the following topics:

How to perform SNC/I Monitoring at the OTU Layer
- What Circuitry (Atomic Functions) that we should use
- What defects to monitor
- Which is the Normal Traffic Signal when doing SNC/I Monitoring at the OTU Layer.
- What happens when we declare an OTU Layer Service-Affecting defect (dLOS, dLOF, dLOM, dLOL, dLOFLOM, dLOR, dAIS, and dTIM)?
- What happens when we declare the SM-dDEG (OTU-layer Signal Degrade) defect?
- How does protection-switching work?
How to perform SNC/I Monitoring at the ODU Layer
- What Circuitry (Atomic Functions) that we should use
- What defects to monitor
- Which is the Normal Traffic Signal when doing SNC/I Monitoring at the ODU Layer.
- What happens when we declare an ODUk Server-Layer service-affecting defects (such as dAIS, dOCI, dLCK, dTIM, dLOOMFI, and dPLM)?
- What happens when we declare ODUj Tributary-Layer service-affecting defects (such as dLOFLOM and dMSIM)
- What happens when we declare the PM-dDEG (ODU-layer Signal Degrade) defect?
- How does protection-switching work?

Check Out the Video Below

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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.

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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.

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OTN – Lesson 10 – Video 4M – ODUkP/ODUj-21_A_Sk Atomic Function

This post presents the 4th 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 4M – Continuation with the ODUkP/ODUj-21_A_Sk Atomic Function

This blog post contains a video that continues our discussion of the ODUkP/ODUj-21_A_Sk Atomic Function. Further, this video picks up (where we left off in Video 3M) where we were discussing the need to maintain synchronization with the OMFI byte-field, and

It proceeds to describe how the ODUkP/ODUj-21_A_Sk declares and clears the dLOOMFI defect condition as we walk through the dLOOMFI/In-Multi-Frame State Machine Diagram.

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OTN – Lesson 10 – Video 3M – ODUkP/ODUj-21_A_Sk Function

This post presents the 3rd 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 3M – The ODUkP/ODUj-21_A_Sk (The ODUk to ODUj Multiplex Sink) Atomic Function

This page contains a video that discusses the ODUkP/ODUj-21_A_Sk Atomic Function in detail.

The purpose of this Atomic Function is to accept an ODUkP server signal and de-multiplex and de-map out each of the various lower-speed ODUj tributary signals within this ODUkP server signal.

This atomic function will also check for each of the following defects within the ODUkP Server and ODUj Tributary Signals:

ODUkP Server Level
- Service-Affecting Defects
  - dLOOMFI
  - dPLM
ODUj Tributary Level
- Service-Affecting Defects
  - dLOFLOM[p]
  - dMSIM[p]

We will cover how the ODUkP/ODUj-21_A_Sk function declares and clears these defects. And More….

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