def __init__(self, alarm_mgr, intf_id, port_type_name):
        super(OltLosAlarm, self).__init__(alarm_mgr, object_type='olt LOS',
                                          alarm='OLT_LOS',
                                          alarm_category=AlarmEventCategory.OLT,
                                          alarm_type=AlarmEventType.COMMUNICATION,
                                          alarm_severity=AlarmEventSeverity.MAJOR)
        # Added port type to indicate if alarm was on NNI or PON
        self._intf_id = intf_id
        self._port_type_name = port_type_name