| m3ua.affected_point_code_mask | Mask | Unsigned 8-bit integer | |
| m3ua.affected_point_code_pc | Affected point code | Unsigned 24-bit integer | |
| m3ua.asp_identifier | ASP identifier | Unsigned 32-bit integer | |
| m3ua.cic_range_lower | Lower CIC value | Unsigned 16-bit integer | |
| m3ua.cic_range_mask | Mask | Unsigned 8-bit integer | |
| m3ua.cic_range_pc | Originating point code | Unsigned 24-bit integer | |
| m3ua.cic_range_upper | Upper CIC value | Unsigned 16-bit integer | |
| m3ua.concerned_dpc | Concerned DPC | Unsigned 24-bit integer | |
| m3ua.concerned_reserved | Reserved | Byte array | |
| m3ua.congestion_level | Congestion level | Unsigned 8-bit integer | |
| m3ua.congestion_reserved | Reserved | Byte array | |
| m3ua.correlation_identifier | Correlation Identifier | Unsigned 32-bit integer | |
| m3ua.deregistration_result_routing_context | Routing context | Unsigned 32-bit integer | |
| m3ua.deregistration_results_status | De-Registration status | Unsigned 32-bit integer | |
| m3ua.deregistration_status | Deregistration status | Unsigned 32-bit integer | |
| m3ua.diagnostic_information | Diagnostic information | Byte array | |
| m3ua.dpc_mask | Mask | Unsigned 8-bit integer | |
| m3ua.dpc_pc | Destination point code | Unsigned 24-bit integer | |
| m3ua.error_code | Error code | Unsigned 32-bit integer | |
| m3ua.heartbeat_data | Heartbeat data | Byte array | |
| m3ua.info_string | Info string | String | |
| m3ua.local_rk_identifier | Local routing key identifier | Unsigned 32-bit integer | |
| m3ua.message_class | Message class | Unsigned 8-bit integer | |
| m3ua.message_length | Message length | Unsigned 32-bit integer | |
| m3ua.message_type | Message Type | Unsigned 8-bit integer | |
| m3ua.network_appearance | Network appearance | Unsigned 32-bit integer | |
| m3ua.opc_list_mask | Mask | Unsigned 8-bit integer | |
| m3ua.opc_list_pc | Originating point code | Unsigned 24-bit integer | |
| m3ua.parameter_length | Parameter length | Unsigned 16-bit integer | |
| m3ua.parameter_padding | Padding | Byte array | |
| m3ua.parameter_tag | Parameter Tag | Unsigned 16-bit integer | |
| m3ua.parameter_value | Parameter value | Byte array | |
| m3ua.protocol_data_2_li | Length indicator | Unsigned 8-bit integer | |
| m3ua.protocol_data_dpc | DPC | Unsigned 32-bit integer | |
| m3ua.protocol_data_mp | MP | Unsigned 8-bit integer | |
| m3ua.protocol_data_ni | NI | Unsigned 8-bit integer | |
| m3ua.protocol_data_opc | OPC | Unsigned 32-bit integer | |
| m3ua.protocol_data_si | SI | Unsigned 8-bit integer | |
| m3ua.protocol_data_sls | SLS | Unsigned 8-bit integer | |
| m3ua.registration_result_identifier | Local RK-identifier value | Unsigned 32-bit integer | |
| m3ua.registration_result_routing_context | Routing context | Unsigned 32-bit integer | |
| m3ua.registration_results_status | Registration status | Unsigned 32-bit integer | |
| m3ua.registration_status | Registration status | Unsigned 32-bit integer | |
| m3ua.reserved | Reserved | Unsigned 8-bit integer | |
| m3ua.routing_context | Routing context | Unsigned 32-bit integer | |
| m3ua.status_info | Status info | Unsigned 16-bit integer | |
| m3ua.status_type | Status type | Unsigned 16-bit integer | |
| m3ua.traffic_mode_type | Traffic mode Type | Unsigned 32-bit integer | |
| m3ua.unavailability_cause | Unavailability cause | Unsigned 16-bit integer | |
| m3ua.user_identity | User Identity | Unsigned 16-bit integer | |
| m3ua.version | Version | Unsigned 8-bit integer | |
| m3ua_reason | Reason | Unsigned 32-bit integer | |
| m3ua_si | Service indicator | Unsigned 8-bit integer | |
| m3ua_ssn | Subsystem number | Unsigned 8-bit integer | |