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012 module
apparatus codes, 4-5
PEC codes, 4-5
100D module
automatic tests, 4-80 - 4-81
clock status
procedure, 4-84 - 4-85
summary, 4-83
CSU Loopback Test, 4-71 - 4-80
error events
procedure, 4-81 - 4-83
summary, 4-81
restoring, 4-80
408 GS/LS-MLX module, 4-36
551 T1 connection, 4-74 - 4-75
A
Access log
checking, 1-24 - 1-25
reviewing, 2-18 - 2-20
Alarm
checking error logs, 1-23 - 1 -24
clearing, 1-20
generated by system, 1-19 - 1-20
Alarm message, 2-3
Analog multiline telephone, 3-4
Apparatus codes, 012 modules, 4-5
Attendant, dialing, 1-9
Audit procedure
calls, 5-25, 5-28 – 5-30
lines, 5-25 - 5-28
Automatic tests, 4-80 - 4-81
Auxiliary power unit,
replacing, 4-8 - 4-9
B
B-channel Ioopback test
error messages, table, 4-57
procedure, 4-55 - 4-56
results, 4-56 - 4-57
summary, 4-54
Behind Switch mode, 1-27 - 1-28
Board controller test
error messages, table, 4-53
procedure, 4-51 - 4-52
results, 4-53
summary, 4-50
Busy-out
extension, 5-13 - 5-15
overview, 4-37 - 4-38
procedure, 4-38 - 4-40
summary, 4-38
trunk, 5-11 - 5-13
C
Call Forwarding feature, 3-5 - 3-6
Carrier
removing, 4-85 - 4-86
replacing, 4-86
types of problems, 4-85
Central office, checking problems, 1-26
Circuit module firmware, upgrading
error conditions, 4-66 - 4-70
procedure, 4-62 - 4-66
summary, 4-61
overview, 4-60 - 4-61
Circuit pack, 3-1
Maintenance and Troubleshooting IN–1