Filter
Top Products
Installation
2-93160-A2-GB21-50 January 1997
Power-Up Self-Test
After you connect the DSU/CSU to a power source, the
unit performs the power-up self-test to ensure that it is in
good working order. The DSU/CSU performs this test on
itself upon power-up or after a device reset, unless it has
been disabled by the Self-Test configuration option (see
Appendix C, Configuration Options).
The self-test includes a basic processor test, a limited
memory test, a code checksum test, and basic verification
tests of the internal components. The front panel LCD
displays the progress and pass/fail status of these
power-up tests.
The power-up self-test consists of the following steps:
1. Once the DSU/CSU is plugged in, the In Progress
screen appears and the Fail LED blinks ON and
Off continuously.
F1
Self-Test:
In Progress
F2
F3
2. All the LEDs then start to flash simultaneously in
the pattern twice ON, then Off. Then, the LCD
begins to flash characters and numbers in the same
pattern, alternating with the flashing LEDs.
3. If the self-test is successful, the Passed screen
appears for one second, the Fail LED turns Off
and the OK LED lights.
F1
Self-Test:
Passed
F2
F3
If the self-test fails, the Failed screen appears for
five seconds. The Fail LED lights, and an
eight-digit failure code (xxxxxxxx) is displayed for
use by service personnel to determine the cause of
the self-test failure. The DSU/CSU continues to
try to operate. If you are in doubt about the results
of the self-test, use the Self-Test Health command
to display the status of this test (see the Self-Test
Health section in Chapter 4, Maintenance).
F1
Self-Test:
Failed
xxxxxxxx
F2
F3
4. The top-level menu screen appears.
F1
DSU ESF
Stat Test Cnfig
F2
F3