4. Maintenance
4-2 February 2001 3160-A2-GB21-90

3. View the results of the last power-up self-test. If no problems were found

during power-up, the following message appears.

Table 4-1. Self-Test Health Messages

Message Description
Passed No problems were found during power-up.
CPU fail The central processing unit failed internal testing.
Device fail One or more of the unit’s integrated circuit chips failed to pass
internal device level testing.
B8ZS/LOS fail The unit failed to encode data properly or to detect Loss Of
Signal.
Alarm fail The unit failed to transmit AIS or to detect an Yellow alarm.
Memory fail The unit failed program checksum verification.
LCD fail The front panel liquid crystal display (LCD) failed.
NET T1 fail The unit failed to internally loop data on the network T1 circuit.
DTE T1 fail The unit failed to internally loop data on the DTE T1 (DSX-1)
circuit.
DSU fail The unit failed to internally loop data on the DSU.
DSU Port
n
fail Port’s integrated circuitry failed to pass device internal testing.
Modem fail Unit failed to internally loop data through the modem circuit.
Unknown Exp Dev The unit is not able to recognize the expansion device connected
to the main circuit card.
Failure

xxxxxxxx

An 8-digit hexadecimal failure code is provided for service
personnel.
F1 F2 F3
STest Health:
Passed