SONET Tab
354
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.
SONET 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 an service disruption event and switch to a backup path.
The service disruption measurements show a granular accuracy of 1 frame duration.
For all
SONET
rates one frame is roughly .125 ms (125 µs)
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
begins monitoring the incoming signal for a service disruption measurement
event as soon as one of the following State options is selected:
Single APS
- Monitors for a single service disruption event. Seconds and
frames are reported and the State returns to Inactive.
Continuous APS
- Constantly monitors for service disruption events, and
updates the seconds and frames reported.
Stop APS
- Stops service disruption monitoring. The State returns to
Inactive.
MPA_e_manual_D07-00-129P_RevA00
Summary of Contents for MPA
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