Figure 11-7. Loop Only Test - ADTRAN DSU III ARdc User Manual

Chapter 11. Testing and Troubleshooting
Interpreting Test Results
A BERT tester must be used to interpret the test results of a DTE & Loop
test.
Loop Only (RT)
The Loop Only (RT) test allows the loop interface and a major portion of
the DTE interface for the local DSU III ARdc to be tested from the remote
site over the actual communication circuit. Figure 11-7 illustrates the
loopback point and the signal paths for this test.
DTE
Interface
Test Purpose
The Loop Only test is used to provide a loopback for network tests.
Initiating
Follow the menu path outlined in Figure 11-8 to initiate a Loop Only test.
11-12
LOCAL
DSU/CSU
Tx Tx
Rx Rx
Local 4-wire Loopback

Figure 11-7. Loop Only Test

DSU III ARdc User Manual
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