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Chapter 3. Configuration
61200659L1-1 MX2800 STS-1 User Manual 3-23
System Alarms
Alarm Description
Protection Switching
Card Failure A controller card has failed. This is a critical
alarm only when the back-up card is not
installed or is not working properly.
Protection
Switch
All data has been routed from the primary card
to the stand-by card.
Communication
Fail
Communication between controller cards A and
B has failed.
System Timing
Clock Status When enabled, an abnormal clock status
condition will cause the CRITICAL relay to be
thrown.The alarm will remain active until the
condition clears or the alarm is acknowledged
by the user.
Clock Source
Change
When enabled, a change in the clock source will
cause the NON-CRITICAL relay to be thrown.
The alarm will remain active until the condition
clears or the alarm is acknowledged by the user.
PRI EXT Clock
Status
When enabled, a fault condition (LOS/AIS or
FAIL) on the PRImary or SEConday external
clock will cause the NON-CRITICAL relay to be
thrown. The alarm will remain active until the
condition clears or the alarm is acknowledged
by the user.
SEC EXT Clock
Status
When enabled, a fault condition (LOS/AIS or
FAIL) on the PRImary or SEConday external
clock will cause the NON-CRITICAL relay to be
thrown. The alarm will remain active until the
condition clears or the alarm is acknowledged
by the user.