| 1||OK response|
No further information.
| 2||Syntax error|
Error detected in syntax.
| 3||Invalid header|
Invalid header segment received.
| 4||Invalid trailer segment|
Invalid trailer segment received.
| 5||Unsupported syntax|
Syntax version/release not supported.
| 6||Unsupported scenario type|
Scenario type not supported.
| 7||Unsupported scenario version|
Scenario version/release not supported.
| 8||Unsupported dialogue type|
Dialogue type not supported for this scenario.
| 9||Unsupported dialogue version|
Dialogue type version/release not supported.
| 10||Unauthorised sender|
Sender not authorized.
| 11||Sender rejected|
Sender rejected for administrative reasons.
| 12||Multiple transactions unsupported|
Multiple parallel transactions not supported.
| 13||Multiple dialogues unsupported|
Multiple parallel dialogues not supported.
| 14||Resources unavailable|
Resources unavailable for requested function.
| 15||Unknown transaction|
Referenced transaction does not exist.
| 16||Unknown dialogue|
Referenced dialogue does not exist.
| 17||Invalid function|
Function invalid for current dialogue state.
| 18||Service unavailable|
Requested service is unavailable.
| 19||Application unavailable|
Requested application not available.
Response not received within expected time.
| 21||Unable to process interactively|
To notify the initiator that a specific request cannot be processed interactively.
| 22||Correctable application error|
To notify the initiator that an application error, that is correctable by the initiator, was made in the request message.
| 23||Nothing to return|
To notify the initiator that there is no information to return in response to an inquiry.
| 24||Data not accessible|
To notify the initiator that the requested information cannot be returned.
| 25||Non-correctable application error|
To notify the initiator that some type of system or processing error was encountered, not related to the data received.