3-34 61204659L1-1ASection 3, Configuration MX2800 STS-1 User ManualSystem ManagementSystem AlarmsTable 3-11 describes System Alarm indications.Table 3-11. System Alarm DescriptionsAlarm DescriptionProtection SwitchingCard Failure A controller card has failed.Protection Switch All data has been routed from the primary card to the standby card.Communication Fail Communication between controller cards A and B has failed.System TimingClock Status* When enabled, an abnormal clock status condition causes the CRITICAL relayto be thrown.The alarm remains active until the condition clears or the alarm isacknowledged.PRI EXT Clock Status* When enabled, a fault condition (LOS/AIS or FAIL) on the PRImary externalclock causes the CRITICAL relay to be thrown. The alarm remains active untilthe condition clears or the alarm is acknowledged.SEC EXT Clock Status* When enabled, a fault condition (LOS/AIS or FAIL) on the SEConday externalclock causes the CRITICAL relay to be thrown. The alarm remains active untilthe condition clears or the alarm is acknowledged.Activity Loss Status* When enabled, the CRITICAL relay is thrown if the Activity Loss Status indi-cates the failure of an internal clock. The alarm remains active until the conditionclears or the alarm is acknowledged.* Critical Alarm
