OTN – Lesson 12 – APS Features within Atomic Functions – Part 2

This blog post presents a video that discusses the APS features within some fo the Atomic Functions that we discussed in Lesson 11.

Lesson 12 – Video 13 – Detailed Implementation of APS within the Atomic Functions – Video 2

This blog post continues 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 ODUT/ODU_A_So and ODUT/ODU_A_Sk functions (ODUT/TCM Layer – SNC/S Monitoring)
    • How do we implement the APS features within these Atomic Functions to support TCM Layer i SNC/S Monitoring and Protection-Switching?
    • How do we implement a complete System-Level design (using these atomic functions along with the ODUT_TT_So and ODUT_TT_Sk Atomic Functions)?
      • NOTE: We discussed these atomic functions in Lesson 11. However, we did not discuss the APS features (within those functions) then.

More specifically, we discuss how our system should implement APS and the APS Communication Protocol whenever the upstream ODUT_TT_Sk Atomic Function declares either a Service-Affecting or the TCMi-dDEG defect.

Check Out the Video Below

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

This blog post presents a video that describes (in detail) SNC/N (Subnetwork Protection – Non-Intrusive) Monitoring for Protection Switching.

Lesson 12 – Video 6 – Detailed Discussion of SNC/N (Subnetwork Circuit – Non-Intrusive) Monitoring for Protection Switching

This blog post contains a video that presents a detailed discussion of SNC/N (Subnetwork Circuit – Non-Intrusive Monitoring, for Protection-Switching purposes, at the ODU Layer.

In particular, this video will discuss the following topics:

  • A Detailed Review of SNC/Ne (Subnetwork Circuit Protection/Non-Intrusive End-to-End) Monitoring, and
  • A Detailed Review of SNC/Ns (Subnetwork Circuit Protection/Non-Intrusive Sublayer) Monitoring.
  • This video shows example locations/conditions of where we would use SNC/Ne or SNC/Ns Monitoring and why we would use this form of monitoring.
  • This video also highlights the similarities and differences between SNC/Ne and SNC/Ns Monitoring.

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OTN – Lesson 12 – Detailed Discussion of CL-SNCG/I Monitoring (Protection Switching)

This blog post presents a video that describes (in detail) CL-SNCG/I (Compound Links – Subnetwork Circuit Group – Inherent) Monitoring for Protection Switching.

Lesson 12 – Video 5 – Detailed Discussion of CL-SNCG/I (Compound Links – Subnetwork Circuit Group – Inherent) Monitoring for Protection Switching

This blog post contains a video that presents a detailed discussion of CL-SNCG/I Monitoring ], for Protection Switching purposes, at the ODU layer.

In particular, this video will discuss the following topics:

  • A Quick Review of the SNC/I Monitoring at the ODU Layer
    • A Single ODUj Tributary is the Normal Traffic Signal
    • How CI_SSF and CI_SSD initiate Protection Switching
  • How to perform CL-SNCG/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 CL-SNCG/I Monitoring at the ODU Layer?
    • What happens when we declare an ODUk Server-Layer service-affecting defects (such as dAIS, dOCI, dLCK, dTIM).
    • What happens when we declare the PM-dDEG (ODU-Layer Signal Degrade) defect?
    • How does protection-switching work?
  • How is CL-SNCG/I Monitoring (for Protection-Switching) different from SNC/I Monitoring for Protection-Switching.
    • PI-TSF/PI-TSD versus CI_SSF[n]/CI_SSD[n]
    • Multiple ODUj Tributary Signals are the Normal Traffic Signal
    • dPLM, dLOOMFI, dMSIM[n], and dLOFLOM[n] do not cause Protection-Switching when CL-SNCG/I Monitoring.

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 (such as 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, dLOOFI, and dPLM)?
    • What happens when we declare ODUj Tributary-Layer service-affecting defects (such as dLOFLOM and dMSIM)
    • Additionally, 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 11 – Tandem Connection Monitoring – Sink Atomic Functions – Video 2

This blog post contains a video that serves as Part TWO of our discussion of the ODUT_TT_Sk Atomic Function. In this video, we discuss how this function declares and clears the TCMi-dTIM, TCMi-dAIS, TCMi-dLCK, TCMi-dOCI, TCMi-dIAE and TCMi-dBIAE defects.

Lesson 11 – Video 4 – Tandem Connection Monitoring – ODUT_TT_Sk Atomic Function, Part TWO

This blog post contains a video that covers the second part of the Sink Direction Tandem Connection Monitoring (TCM) related Atomic Functions.

In particular, this video covers the second part of the ODUT_TT_Sk Atomic Function.

More specifically, this video covers the following functions (within the ODUT_TT_Sk Atomic Function).

  • How the ODUT_TT_Sk Atomic Function declares and clears the following defect conditions
    • TCMi-dTIM (Trail Trace Identification Mismatch Defect for TCM Level i)
    • TCMi-dAIS (Alarm Indication Status Defect for TCM Level i)
    • TCMi-dLCK (Locked Status Defect for TCM Level i)
    • TCMi-dOCI (Open Connection Indicator Defect for TCM Level i)
    • TCMi-dLTC (Loss of Tandem Connection Monitoring Defect for TCM Level i)
    • TCMi-dIAE (Input Alignment Error Defect for TCM Level i)
    • TCMi-dBIAE (Backward Input Alignment Error Defect for TCM Level i)

Check out the Video Below

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