Troubleshooting New Installs; Table 13-2. Troubleshooting New Installs - ADTRAN DSU IV ESP User Manual

Chapter 13. Testing and Troubleshooting

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 13-2 to ensure the unit is configured
properly.
After verifying the items listed in Table 13-2, 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
13-7.
Configuration
Item to Check
DTE Type
Loop Rate
Data Format
DTE Cable
Telco Cable
Power the Unit
Off and then On
13-6

Table 13-2. Troubleshooting New Installs

Option Selection
EIA-232 or V.35
Auto, 2.4 to 64 kbps
Async or Sync
N/A
N/A
N/A
DSU IV ESP User Manual
M L
ATA ODE OOP
Action
From the C
ONFIGURATION
the type of DTE interface option to con-
nect to the DSU/CSU.
From the C
ONFIGURATION
the DDS loop rate of the DDS circuit.
From the C
ONFIGURATION
the type of data to be used.
Verify DTE cable connection to the
proper DTE connector on the DSU/
CSU.
Verify the telco cable is securely con-
nected to the DSU/CSU and wall jack.
Verify the unit passes self-test during
power-up (displayed on the LCD).
I N is
S ORMAL
menu, select
menu, select
menu, select
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