Troubleshooting New Installs - ADTRAN DSU III AR User Manual

Chapter 11. Testing and Troubleshooting
Message
CHECK
Transmit/receive pair
reversal detected.
TELCO LINE
TEST FROM Telco activated a
loopback to test the
TELCO
DDS circuit.

Troubleshooting New Installs

Before initiating diagnostics on a newly installed unit and/or DDS
circuit and before contacting ADTRAN Technical Support, please
check the items in Table 11-2 to ensure the unit is configured
properly.
After verifying the items listed in Table 11-2 on page 11-7, the unit
should operate properly and display the following:
DATA MODE
LOOP IS NORMAL
If a status message other than D
shown, begin performing diagnostics described in the section Test
Sequence for Troubleshooting New Installs or Existing Circuits on page
11-8.
11-6
Table 11-1. Messages from the DSU/CSU (Continued)
Meaning Probable Cause
Telco wall jack wired
incorrectly.
Telco is testing circuit. Wait until test is complete or
DSU III AR User Manual
Action
Switch wire pairs in wall jack
or contact telco service pro-
vider.
contact telco service provid-
er.
M L I N
ATA ODE OOP S
is
ORMAL
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