This attribute specifies how many unrestricted 64 kbit/s 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 unrestricted 64 kbit/s calls is less than
unrestricted64kAlarmThreshold in a subsequent interval.
If the value is 0 the rejected unrestricted 64 kbit/s calls are not
monitored.