This object represents the notification control mode.
The semantics are as follows.
noControl - There is no control on notifications.
forcedControl - All notifications configured through
cNotifCtrlTable are filtered at all times.
automaticControl - Notifications configured through
cNotifCtrlTable are filtered only when number of
notifications generated exceeds the value represented
by cNotifCtrlThreshold in the given time interval
represented by cNotifCtrlSamplingInterval.