Phybridge UniPhyer LB-UA2324, Описание системы

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1.8 Fault Management
Fault management is conceptually partitioned into two levels: the system top level, and
interface-specific level. Both levels are alarm-level configurable and can be Major and Minor. All
the alarms are mask-able.
Fault management provides the alarm output through visible indicator (LED). The alarm/status
indications are automatically generated as a result of certain events/conditions. The UniPhyer
LB-UA2348 supports query of all current alarm status. It is also able to keep 256 records of
historical alarms and events respectively.
The UniPhyer LB-UA2348 provides the ability to group alarms in a hierarchical alarm presentation
scheme. Alarms of the same rank can exist at the same time. A lower-ranking alarm will be
demoted if a higher-ranking alarm is raised for the same object. For example, if a far-end LOS is
raised on a circuit and then a far-end LPR is raised on the circuit, the LPR alarm stands and the LOS
closes. The alarm hierarchy used in the UniPhyer LB-UA2348 system is shown in the following
table:
Note: All alarms are enabled in default configuration.
Table 0-3 UniPhyer LB-UA2348 Alarm Hierarchy
Priority Alarm Type
Highest all activation failures (ADSL_COMMF_FE or ADSL_NOPEER_FE)
— far-end LPR
— near-end LOS or far-end LOS
Lowest near-end LOF or far-end LOF (near-end and far-end are independent;
for example, FE-LOS does not restrain NE-LOF)
Note: 1. LOM, LCD, and NCD are not included in the alarm hierarchy; they’re treated
independently.
2. The PM counters LPR, LOS, and LOF follow the alarm hierarchy rule. When these
alarms exist at the same time, only the PM counter of a higher-ranking alarm will count
(the PM counters of other lower-ranking alarms will not).
System Alarms
The UniPhyer LB-UA2348 provides the following System alarms:
Fan Failure Alarm
Above Temperature