This DisplayString, delivered with an alarm notification, gives the numeric code number that the CODIMA Express assigns to this specific type of event. An admin can use this code to look up the exact alarm type in device documentation or to filter/correlate similar alerts programmatically, rather than relying on free-text matching of alarmMessage. For example, a consistent alarmCode value appearing across multiple traps would let the admin confirm they're all instances of the same underlying alarm condition.