The requested state of the audible alarm. When in
the disabled state, the audible alarm should never
sound. The enabled state is self-describing. Setting
this object to muted(3) when the audible alarm is
sounding shall temporarily silence the alarm. It will
remain muted until it would normally stop sounding and
the value returned for read operations during this
period shall equal muted(3). At the end of this
period, the value shall revert to enabled(2). Writes
of the value muted(3) when the audible alarm is not
sounding shall be accepted but otherwise shall have no
effect.