H31-341_V2.5 · Question #906
When the PM segment of the ODUk generates seriously errored seconds, the network management will report the ODUk_PM_ES alarm.
The correct answer is B. False. Option B is correct because seriously errored seconds (SES) and errored seconds (ES) are distinct OTN performance metrics, each mapped to its own alarm. When the PM segment of an ODUk generates seriously errored seconds, the network management system reports ODUk_PM_SES - not…
Question
When the PM segment of the ODUk generates seriously errored seconds, the network management will report the ODUk_PM_ES alarm.
Options
- ATrue
- BFalse
How the community answered
(17 responses)- A29% (5)
- B71% (12)
Explanation
Option B is correct because seriously errored seconds (SES) and errored seconds (ES) are distinct OTN performance metrics, each mapped to its own alarm. When the PM segment of an ODUk generates seriously errored seconds, the network management system reports ODUk_PM_SES - not ODUk_PM_ES. The ODUk_PM_ES alarm is reserved specifically for (regular) errored seconds, which represent a lower severity threshold than SES.
Why A is wrong: Choosing True conflates two separate alarms. Seriously errored seconds trigger ODUk_PM_SES; substituting ODUk_PM_ES is a type mismatch between the performance event and its corresponding alarm name.
Memory tip: The alarm name is always a direct mirror of the abbreviation for the triggering event - ES triggers _ES, SES triggers _SES. If the question swaps the suffix, the statement is false. Think: "the alarm wears the same badge as the event."
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