| m2ua.action | Actions | Unsigned 32-bit integer | |
| m2ua.asp_identifier | ASP identifier | Unsigned 32-bit integer | |
| m2ua.congestion_status | Congestion status | Unsigned 32-bit integer | |
| m2ua.correlation identifier | Correlation identifier | Unsigned 32-bit integer | |
| m2ua.data_2_li | Length indicator | Unsigned 8-bit integer | |
| m2ua.deregistration_status | Deregistration status | Unsigned 32-bit integer | |
| m2ua.diagnostic_information | Diagnostic information | Byte array | |
| m2ua.discard_status | Discard status | Unsigned 32-bit integer | |
| m2ua.error_code | Error code | Unsigned 32-bit integer | |
| m2ua.event | Event | Unsigned 32-bit integer | |
| m2ua.heartbeat_data | Heartbeat data | Byte array | |
| m2ua.info_string | Info string | String | |
| m2ua.interface_identifier_int | Interface Identifier (integer) | Unsigned 32-bit integer | |
| m2ua.interface_identifier_start | Interface Identifier (start) | Unsigned 32-bit integer | |
| m2ua.interface_identifier_stop | Interface Identifier (stop) | Unsigned 32-bit integer | |
| m2ua.interface_identifier_text | Interface identifier (text) | String | |
| m2ua.local_lk_identifier | Local LK identifier | Unsigned 32-bit integer | |
| m2ua.message_class | Message class | Unsigned 8-bit integer | |
| m2ua.message_length | Message length | Unsigned 32-bit integer | |
| m2ua.message_type | Message Type | Unsigned 8-bit integer | |
| m2ua.parameter_length | Parameter length | Unsigned 16-bit integer | |
| m2ua.parameter_padding | Padding | Byte array | |
| m2ua.parameter_tag | Parameter Tag | Unsigned 16-bit integer | |
| m2ua.parameter_value | Parameter value | Byte array | |
| m2ua.registration_status | Registration status | Unsigned 32-bit integer | |
| m2ua.reserved | Reserved | Unsigned 8-bit integer | |
| m2ua.retrieval_result | Retrieval result | Unsigned 32-bit integer | |
| m2ua.sdl_identifier | SDL identifier | Unsigned 16-bit integer | |
| m2ua.sdl_reserved | Reserved | Unsigned 16-bit integer | |
| m2ua.sdt_identifier | SDT identifier | Unsigned 16-bit integer | |
| m2ua.sdt_reserved | Reserved | Unsigned 16-bit integer | |
| m2ua.sequence_number | Sequence number | Unsigned 32-bit integer | |
| m2ua.state | State | Unsigned 32-bit integer | |
| m2ua.status_info | Status info | Unsigned 16-bit integer | |
| m2ua.status_type | Status type | Unsigned 16-bit integer | |
| m2ua.traffic_mode_type | Traffic mode Type | Unsigned 32-bit integer | |
| m2ua.version | Version | Unsigned 8-bit integer | |