2. Installation
2-10 February 2001 3160-A2-GB21-90
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

Self-Test Health

in Chapter 4,
Maintenance
).
4. The top-level menu screen appears.
F1 F2 F3
Self-Test:
Failed
xxxxxxxx
F1 F2 F3
DSU ESF
Stat Test Cnfig