Agilent Technologies 622Vu Advisor, User Manual

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Proceed to Section 9.3 Using the AAL5 Wizard (page 160) for instructions
to create AAL5 PDUs using 622Vu Advisor’s wizard capability. The wizard
simplifies the task of creating PDUs for analysis, by formatting the SAR
(Segmentation and Reassembly) and CPCS (Common Part Convergence
Sublayer) settings for you automatically, and by computing the PDU’s CRC.
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Proceed to Section 9.4 Defining the Cells In a Sequence (page 163) to
define individual cells within a sequence.
9.1 Inheriting Cell Characteristics
The basis of 622Vu Advisor’s ATM analysis involves transmitting and monitor-
ing traffic at the cell level. 622Vu Advisor uses two entities to group and process
cells:
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A sequence combines one or more individual cell definitions (and in-
formation telling it how to use those definitions). You’ll access all cells
through a sequence definition; each cell participates in one and only one
sequence.
•
A script combines one or more sequences to form a transmission used to
analyze ATM networks and devices.
Conceptually, then, scripts are at the highest level, the sequences are at the next
level, and cells are at the lowest level. This is illustrated in Figure 4.
Several cell-specific properties are maintained at each of the cell, sequence, and
script levels. At each level, every individual property is either defined (i.e., set
explicitly) or undefined (never set or set to the undefined state).
9: Editing Transmit Sequences
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