VeEX MPA User Manual page 240

MPA_e_manual_D07-00-129P_RevA00
OTN Test - Service Disruption
The MPA can measure Service Disruption switching intervals in your network and can
be configured to monitor for a specific event that will cause a service disruption switch.
When this event occurs, the duration in both seconds and frames is logged. These
statistics can be used to determine how long it takes for your network equipment to
react to a service disruption event and switch to a backup path.
The service disruption measurements show a granular accuracy of 1 frame duration.
See table below for granular accuracy per frame.
Test Service Disruption functions include:
•
Action (State) - Starts and stops Service Disruption mode. If an event occurs,
the protection switch time will appear in both seconds and frames present. The
results will not include the number of good frames, but the number of errored
frames that occur before the first good frame. This is based on the previously
selected criteria for the consecutive time and frame requirements. The unit
Select Pause Test.
When Pause is selected, the system stops collecting
data, but the Elapsed Time counter continues.
Additionally, when Pause is selected, a red Test
Paused LED appears in the LEDs Quick Status area.
To resume a test:
Select Resume Test.
The Test Paused LED turns white with red text,
indicating that the test was paused earlier.
Events occurring while in Pause mode will not be
recorded in the Results Errors/Alarms screens, Event
Log nor Performance Monitoring screens, however the
corresponding event's LED will still turn red.
Pressing Clear History or Restarting a new test will
clear all LED history.
OTN Tab
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