Lesson 12 – Video 10 – Detailed Discussion of APS Commands – Video 3
This blog post continues our discussion of APS Commands and the APS/PCC Communication Protocol. This video serves as Video 3 in this discussion. This blog post discusses completing the Force Switch Commands and the SF (Signal Fail) Commands using the APS/PCC Communication Protocol.
In particular, this video will discuss the following topics:
- Executing the Force Switch – Normal Traffic Signal n to Protection (for the 1:N Protection Architecture) – Continued from Video 9
- Implementing the Force Switch – NULL Test Signal to Protection Command – another way to resume Normal Operation.
Signal Fail APS Commands
- Executing the Signal Fail – Working Transport Entity (SF_W) Command (for the 1+1 Protection Architecture)
- How does a given Network Element invoke the SF_W Command?
- The Protection Group’s operation during SF_W Command execution.
- How do we recover from this Command (for a Reverting System)?
- Use of the WTR (Wait-to-Restore) Command
- Executing the Signal Fail – Protection Transport Entity (SF_P) Command (for the 1+1 Protection Architecture)
- How does a given Network Element invoke the SF_P Command?
- The Protection Group’s operation during SF_P Command execution.
- How do we recover from this Command?
- Executing the Signal Fail – Working Transport Entity (SF_W) Command (for the 1:N Protection Architecture)
- How does a given Network Element invoke the SF_W Command?
- The Protection Group’s operation during SF_W Command execution.
- How do we recover from this Command (for a Reverting System)?
- Use of the WTR (Wait-to-Restore) Command.
- Executing the Signal Fail – Protection Transport Entity (SF_P) Command (for the 1:N Protection Architecture)
- How does a given Network Element invoke the SF_P Command?
- The Protection Group’s operation during the SF_P Command execution.
- How do we recover from this Command?