Agilent Technologies OmniBER 718 SDH User Manual page 165

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ATM Operation
Setting Foreground and Background Distributions
Burst Size
This is the number of cells transmitted at the peak cell rate, a value which may vary
from the selected value due to cell delay variation.
Setting up background
How To
1 Selecting the SETUP as
can be set up as an 8-bit user-selectable pattern for each background. The number
of cells per second on each background can also be set. This is limited by the
bandwidth which is occupied by the foreground. Setting a unique value in the
payload byte for each background can help you to trace and identify cell streams
later.
Note
If there is any extra bandwidth left over after the foreground and background are
filled with FILL CELLS, you can select between IDLE or UNASSIGNED Cells to
fill the remaining cells.
164
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BACKGROUND
PAYLOAD/DISTRIBUTION
and CELL STREAM as
allows the 7 backgrounds to be set up. The payload

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