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Chapter 6. Diagnostics
#x Local Loopback
During this test, all information from the network side (DS3) for the
selected DSX-1 interface is looped back towards the network. This
test is similar to the framer loopback test (described in the previous
paragraph), with the exception that this test penetrates the circuitry
deeper into the Quad DSX-1 interface card. See Figure 6-12 for an
illustration of this test.
OSU 300
Quad DSX-1
DSX-1
DS3 MUX
T3
Figure 6-12. T1 Local Loopback Test
#x Line Loopback
During this test, all information on the selected DSX-1 interface,
including framing, is looped back towards the DTE. See Figure 6-13
for an illustration of this test.
OSU 300
Quad DSX-1
DSX-1
DS3 MUX
T3
Figure 6-13. Line Loopback Test
61200663L1-1
OSU 300 User Manual
6-9
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