Description: History alarm table. The device shall maintain this table, to maintain all cleared alarms generated by the device, including: 1. Not hit device local alarm filter. That means had been reported to trap receiver (NMS or EMS) 2. Hit local alarm filter. That means not trap is reported to trap receiver for the alarm. The number of history alarm enteries in the table could be device-specific. However, it is recommended no less than 200 entries. The detailed function definition refers to that given in description of activeAlarmTable.