VeEX MPA, User Manual

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Protocol Tabs
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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 SONET processors the Protection Switch Criteria include: B1 , SEF , AIS-
L , AIS-P , AIS-V , and PRBS (Bit Errors and Loss of Pattern Sync).
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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.
For all SONET processors the range is 0.125 to 2047.875 ms, and is
entered using a keypad.
•
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.
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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.
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Switch Frames - Indicates the Current (most recent), Average, Minimum and
Maximum number of errored frames received during the service disruption event.
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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 Service Disruption Reports include up to 200 of the most recent switch
measurements (in ms).
A complete summary of Service Disruption measurements for all processors in
the unit can be viewed by selecting the System tab and choosing Service
Disruption .
SONET Test - RTD (Round-Trip Delay)
The round-trip delay function allows you to transmit a known frame into your network
and measure how long it takes for the frame to return to the unit.
MPA_e_manual_D07-00-129P_RevA00