A flag indicating how the UPS should handle audible
line fail alarms:
timed(1): UPS alarm will sound after a preset timed duration starting
from the line fail condition (see OID upsAdvConfigAlarmTimer for the
alarm timer value)
atLowBattery(2): UPS alarm will sound when the UPS has reached a Low
Battery condition during a line fail
never(3): Disables the UPS audible alarm
mute(4): Mutes the current alarm for some UPSs only when it is in an
alarm state and will return to the previously configured option when
the UPS recovers from the alarm condition