Protection-Switching Related Blog Posts

Protection-Switching Related Blog


Protection-Switching Related Blog Posts

Basic Protection-Switching Terms

Protection Switching (Linear)

1+1 Protection-Switching Architecture

  • Permanent Bridge

1:N Protection-Switching Architecture

Unidirectional Protection-Switching

Bidirectional Protection-Switching

Reverting Protection-Switching

  • Wait-to-Restore
  • The WTR (Wait-to-Restore) Command
  • Advantages and Disadvantages of Using a Revertive Protection-Switching system

Non-Reverting Protection-Switching

  • The DNR (Do-Not-Revert) Command

Types of Monitoring (for Protection-Switching)

SNC/I – Sub-Network Circuit/Inherent Monitoring

  • What is SNC/I Monitoring – at the OTUk Layer?
  • When will the Tail-End circuitry declare SF for SNC/I Monitoring – at the OTUk Layer?
  • When will the Tail-End circuitry declare SD for SNC/I Monitoring – at the OTUk Layer?
  • What is SNC/I Monitoring – at the ODUk Layer?
  • When will the Tail-End circuitry declare SF for SNC/I Monitoring – at the ODUk Layer?
  • When will the Tail-End circuitry declare SD for SNC/I Monitoring – at the ODUk Layer?

SNC/S – Sub-Network Circuit/Sublayer Monitoring

  • What is SNC/S Monitoring?
  • When will the Tail-End circuitry declare SF for SNC/S Monitoring?
  • When will the Tail-End circuitry declare SD for SNC/S Monitoring?

SNC/Ne – Sub-Network Circuit/Non-Intrusive Monitoring – End-to-End

  • What is SNC/Ne Monitoring?
  • When will the Tail-End circuitry declare SF for SNC/Ne Monitoring?
  • When will the Tail-End circuitry declare SD for SNC/Ne Monitoring

SNC/Ns – Sub-Network Circuit/Non-Intrusive Monitoring – Sublayer

  • What is SNC/Ns Monitoring?
  • When will the Tail-End circuitry declare SF for SNC/Ns Monitoring?
  • When will the Tail-End circuitry declare SD for SNC/Ns Monitoring?

The APS/PCC Protection-Switching Protocol for Linear Protection Switching

  • The APS/PCC field-format for Linear Protection-Switching
  • APS Command Priorities for Linear Protection-Switching
  • The LoP (Lock-Out of Protection) Command
  • The SF-P (Signal Fail in the Protection Transport Entity) Command
  • The SF-W (Signal Fail in the Working Transport Entity) Command

Protection Switching (ODUk Shared Ring)

2-Fibre/2-Lambda Shared-Ring Protection-Switching Systems

4-Fibre/4-Lambda Shared-Ring Protection-Switching Systems

Span-Switching

Ring-Switching

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