VeEX MPA, User Manual

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SDH Tab
496
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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 .
SDH 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.
Test RTD functions include:
•
Action (State): Starts and stops round-trip delay mode.
Single Round-Trip Delay - If selected, a burst of payload BIT errors are
inserted into a frame and transmitted through your network. The frame's
transmission through the network is measured in frame counts and
milliseconds. Frame counts indicates the number of frames received before
the errored frame is received by the unit. Milliseconds indicates how long it
took for the errored frame to travel out and return to the unit.
Continuous Round-Trip Delay - If selected, a continuous burst of payload
BIT errors are inserted into each frame and transmitted continuously through
your network. The current frame count and duration appear in the
Current
column. The fastest round trip appears in the Minimum column and the
slowest round trip appears in the Maximum column.
Stop Round-Trip Delay - Stops round-trip delay activity. The State returns
to Inactive.
•
Round Trip Delay Time (milliSec): Indicates the duration in milliseconds that it
takes for each errored frame transmitted to return back to the unit.
•
Round Trip Delay Time (Frames): Indicates the number of frames detected
after each errored frame is transmitted and return back to the unit.
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