Cisco ONS 15310-CL, Руководство по устранению неисправностей

Страница: 122 / 332

1-16
Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
78-17235-01
Chapter 1 Alarm Troubleshooting
1.5.4 Alarm Hierarchy
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 1-10 .
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 (AIS-L), path
(AIS-P, etc.) or VT (AIS-V, etc.). The full hierarchy for near-end failures is shown in
Table 1-11 . This
table is taken from Telcordia GR-253-CORE.
— UNEQ-P
Lowest TIM-P
Table 1-9 Path Alarm Hierarchy
Priority Condition Type
Table 1-10 Facility Alarm Hierarchy
Priority Condition Type
Highest LOS
— LOF
— AIS-L
— SF-L
— SD-L
— RFI-L
— TIM-S
— AIS-P
— LOP-P
— SF-P
— SD-P
— UNEQ-P
— TIM-P
Lowest PLM-P
Table 1-11 Near-End Alarm Hierarchy
Priority Condition Type
Highest LOS
— LOF
— AIS-L
— AIS-P
1
— LOP-P
2
— UNEQ-P
— TIM-P
— PLM-P