This read-write value selects whether ring check notifications on the user side are sent as event(1) or alarm(2) type traps, defaulting to event(1). An admin sets this to alarm(2) if the NMS needs ring check conditions treated as persistent alarms requiring acknowledgment rather than one-time events. Setting this to alarm(2) causes a detected user-side ring condition to generate an alarm-style trap that typically stays active until explicitly cleared, rather than a fire-and-forget event trap.