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Chapter 7. Test Menu
61202156L2-1 TDU 120e User Manual 7-9
A test pattern is sent from the controller through a loop-
back on all other boards and is checked on the controller.
This verifies the data path, clocks, and control signals.
If a failure is detected, note the failure number prior to
contacting ADTRAN Technical Support (see page xi of
this manual).
Port Tests
The P
ORT
T
ESTS
menu is used to activate testing of specif-
ic data ports. It controls the activation of loopbacks and
the initiation of data test patterns. Test results are dis-
played on the terminal screen.
Nx/DBU (0.1) Menu Items
Nx/DBU (0.1) is the base Nx interface. It offers the follow-
ing test functions:
DTE LOOPBACK
This initiates a loopback. The following options are avail-
able:
REMOTE
The remote loopback causes a V.54 code to be sent to
the far end.
The Nx at the far end activates a PORT/LOCAL
loopback upon detection of the V.54 code.
The execution of the self-test will disrupt normal data flow and prevent remote
communication until the self-test is completed.
The execution of Port Tests will disrupt normal data flow in the port being tested.