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Virtual Front Panel
ST112 SONET Transmission Test Set
4–33
Figure 4–39 VT1.5 Structures
VT1.5 and DSX-1 Configuration
Figure 4–40 VT1.5/DSX-1 Configuration
The VT1.5/DSX-1 CONFIGURATION menu (
y
) shown in Figure 4–40 has three section that are
used to generate payload test patterns. The top section is used for DS1 FRAMING. Four possible
choices are shown: UNFRM (Unframed), SF (Super Frame), ESF (Extended Super Frame), and
SLC96 (Subscriber Loop Carrier 96)
The next menu section is used to configure the test patterns for DSX-1 (DSX1) and VT1.5 payloads,
as follows: QRW (Quasi Random Word), 2E15 PRBS (Pseudo Random Bit Sequence), 2E23 PRBS,
and a six character hexadecimal word (wd440004 in this example).
The third menu section is used to access the DSX-1 (DSX1) STRESS PATTERN that can
be used for DSX-1 network testing. The selected stress pattern is active during the test cycle.
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