Troubleshooting New Installs Or Existing Circuits - ADTRAN DSU III ARdc User Manual

Chapter 11. Testing and Troubleshooting

Troubleshooting New Installs or Existing Circuits

If your DSU ....
is suspected of having problems
is receiving excessive errors requiring retrans-
mission of data
continues to receive excessive errors requir-
ing retransmission of data
If an external BERT tester is available, these additional tests may be per-
formed:
•
•
•
If the unit fails any of these tests or the problem has not been determined,
contact ADTRAN Technical Support; see inside back cover of this manual.
11-8
DTE & Loop Test
DTE Only Test
Loop Only Test
DSU III ARdc User Manual
then...
perform a Self Test to determine the unit is in
good health.
perform a DTE with Test Pattern Test
to determine if the unit's internal transmitter
and receiver is operating error free.
perform a Remote Test to verify an error-free
connection between the local and remote
unit. Run the test using all available test pat-
terns.
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