Loop Only (Rt); Test Purpose; Figure 11-7. Loop Only Test - ADTRAN DSU III AR User Manual

Chapter 11. Testing and Troubleshooting

Loop Only (RT)

The L
portion of the DTE interface for the local DSU III AR 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 L
11-14
O (RT) test allows the loop interface and a major
OOP NLY
LOCAL
DSU/CSU
DTE Tx
DTE Rx
O test is used to provide a loopback for network tests.
OOP NLY
DSU III AR User Manual
NET Tx
NET Rx

Figure 11-7. Loop Only Test

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