VeEX MPA User Manual page 241

MPA_e_manual_D07-00-129P_RevA00
Protocol Tabs
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.
•
Protection Switch Criteria - Determines the type of alarm, error, or pattern
event that is used as a trigger to generate service disruption activity in your
network. The unit monitors the incoming signal for the specified event. If it
occurs, its duration in both seconds and frames is measured and logged.
For all OTN processors the Protection Switch Criteria include: OOF, OTU-AIS,
OTU-BIP8, ODU-AIS, ODU-BIP8, and BIT (Bit Errors and Loss of Pattern Sync).
•
Good Time - This function allows you to enter the time-duration (in milliseconds)
of consecutive error-free frames to elapse before Protection Switch
measurements stop accumulating.
•
Good Frames - This function allows you to enter the number of consecutive
error-free frames to occur before Protection Switch measurements stop
accumulating. The range is 1 to 16383 frames, and is entered using a keypad.
•
Switch MilliSecs - Indicates the Current (most recent), Average, Minimum and
Maximum durations (in milliseconds) that it took for the service disruption events
(errored frames) to occur.
•
Switch Frames - Indicates the Current (most recent), Average, Minimum and
Maximum number of errored frames received during the service disruption event.
•
History Recent Milliseconds: The 10 most recent measurements (in ms) are
displayed from left to right (5 on the top line and 5 on the bottom line).
•
History Recent Frames: The 10 most recent measurements (in frames) are
displayed from left to right (5 on the top line and 5 on the bottom line).
The following table lists time granular accuracy, per 1 frame duration, for each protocol
processor, as well as the max Consecutive Good Frames / Time Required settings.
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