Cisco ONS 15310-MA Troubleshooting Manual page 17

Chapter 2 Alarm Troubleshooting
Facility (port) alarms also follow a hierarchy; lower-ranking alarms are closed by higher-ranking alarms.
The facility alarm hierarchy used in the systems is shown in
Table 2-10
Priority
Highest
—
—
—
—
—
—
—
—
—
—
—
—
Lowest
Near-end failures and far-end failures follow different hierarchies. Near-end failures stand according to
whether they are for the entire signal (LOS, loss of frame alignment [LOF]), facility (MS-AIS), path
(AU-AIS, etc.) or VC (TU-AIS, etc.). The full hierarchy for near-end failures is shown in
This table is taken from Telcordia GR-253-CORE.
Table 2-11
Priority
Highest
—
—
—
—
—
—
—
—
—
—
78-18663-01
Facility Alarm Hierarchy
Condition Type
LOS
LOF
MS-AIS
MS-EXC
SD-L
MS-RFI
RS-TIM
AU-AIS
AU-LOP
HP-EXC
HP-DEG
HP-UNEQ
HP-TIM
LP-PLM
Near-End Alarm Hierarchy
Condition Type
LOS
LOF
MS-AIS
AU-AIS
AU-LOP
HP-UNEQ
HP-TIM
LP-PLM
TU-AIS
TU-LOP
LP-UNEQ
Cisco ONS 15310-MA SDH Troubleshooting Guide, Release 9.0
Table 2-10.
1
2
1
2
Trouble Notifications
Table 2-11.
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