This attribute specifies how many audio 3.1 kHz calls can be
rejected by one dcmeLink within the alarmTimeInterval time before
a SET alarm is generated. This alarm is cleared when the number of
rejected audio 3.1 kHz calls is less than audio3kHzAlarmThreshold
in a subsequent interval.
If the value is 0 the rejected audio 3.1 kHz calls are not monitored.