The cmnAlarmMaskTable contains entries that report the current masking state of alarms. The mask of an alarm can be changed between masked(1) and unmasked(2). If an alarm is unmasked, the threshold configuration can affect the reporting of this alarm.

The structure of the table is such that alarm mask is supported on a unit or interface basis, and then on an alarm type basis within the interface. For simplicity sake and to support the reporting of status of all alarms, a unit is treated as an interface in this table.