User manual

Chapter 7. Test Menu
7-8 TDU 120e User Manual 61202156L1-1
Upon invoking the command, the terminal displays S
YSTEM
S
ELF
-T
EST
and the Test LEDs are illuminated. Test failures
are displayed on the terminal.
The self-test consists of the following:
A test pattern is sent from the controller through a loopback
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.
The execution of the self-test will disrupt normal data flow
and prevent remote communication until the self-test is
completed.
Port Tests
The P
ORT
T
ESTS
menu is used to activate testing of specific
data ports. It controls the activation of loopbacks and the
initiation of data test patterns. Test results are displayed on
the terminal screen.
Test Name What it does...
Board level
tests
Each of the TDU 120e boards contains an on-
board processor which executes the following
series of tests checking the circuitry on the
board:
RAM tests; EPROM checksum
DS0 map tests
On board data path (sending a known test pat-
tern through an on-board loop)
Unit level tests Unit level tests consist of:
Front panel LED verification
Phase Lock Loop verify
Board-to-board interface test