This object indicates whether the audible/visible
local alarm relay has been locally cut off for this
particular alarm source. When this status is 'normal',
the alarm in this entry has closed the local
audible/visible alarm relay contacts. When this
status is 'cutoff', the alarm in this entry initially
closed the local relay contacts, but was suppressed by
a local user pressing the external ACO button on the
6400 NSP.