ADTRAN 1200063L1, Manual

Page: 54 / 137

Chapter 4. Testing and Troubleshooting
4-10 DSU III TDM User Manual 61200063L1-20
Initiating
Follow the menu path outlined in Figure 4-8 to initiate a
L
OOP
O
NLY
test.
Figure 4-8. Initiating a Loop Only Test
Interpreting Test Results
The Loop Only test is used for the purpose of looping the DDS circuit back to
the telco. No test results are available from the local DSU III TDM.
1=DTE & LOOP(LL)
2=LOOP ONLY (RT)
3=DTE ONLY
4=DTE WITH TP
1=LOCAL UNIT 5=TEST PATTERN
2=TEST 6=SELF TEST
2=REMOTE UNIT
3=DBU CONNECTION