OC3port Plus
User Manual
6-72
This display contains the following information:
Line 1
Title of the Test (
2 PT CELL DELAY VAR
)
Line 2
Status of test. Indicates whether the OC3port Plus is currently
capturing cells (
COLLECTING
), processing test results
(
PROCESSING
), or stopped (
STOPPED
).
Line 3
Provides the peak-to-peak CDV (the difference between the
earliest arriving cell and the latest arriving cell) in units of cell
times (ct).
5. Press
ENTER
to exit the result display.
Note
Unlike the Cell Loss test, you cannot exit a Cell Delay Variation test
result display and let the test run in the background while you
perform other OC3port Plus tasks.
The Cell Delay Variation test requires all of the processing power of
the OC3port Plus; therefore, if you want to exit the result display,
you must stop the test. To do this, press
ENTER
. The test ends
immediately. Line 2, the status line, displays this message:
STOPPED
. You can now press any key to perform any other
operations.
Cell Transfer Delay Test
This test enables you to measure transit delays as cells are sent across a network.
In this test, the OC3port Plus transmits cells, marking them with a transmit time
stamp. It then captures these same cells and attaches a time stamp to them as they
are received. Finally, it performs an analysis of the transfer delay of each cell by
comparing the transmit and receive timestamps.
Note
The same OC3port Plus analyzer must be used in this test as both the
source and receiver of test traffic because the transmit and receive
time stamps must originate from the same timing source.
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