When sending Voice and TextToSpeech messages, these are the potential error codes:
| Status | Result | Explanation | Retry Limit |
|---|---|---|---|
| Success | Sent Ok | Voice call received and answered successfully | |
| Success | Max Duration | Voice call received and answered successfully and the Max Duration limit (LIM and/or LIMB) was reached | |
| Success | AnswerPhone | Voice call received and answered successfully by an answering machine/voicemail | |
| Success | AnswerPhone Dropped | Voice call received and answered successfully by an answering machine/voicemail. The call was dropped due to your call's settings. | |
| Failed | No Valid Option Selected | 'Require Keypad Button Press' (KeypadOptionRequired) has been enabled for this message and the recipient didn't press a valid keypad button | |
| Failed | Busy | Recipient responded with Busy tone | |
| Failed | No Answer | Call unanswered within 60 seconds | |
| Failed | Fax Machine | Voice call received and answered by a fax machine (not a human) | |
| Failed | Modem | Voice call received and answered by a modem (not a human) | |
| Failed | Invalid Voice Number (RP-Max) | Mobile number is invalid (too many digits for the supplied network/carrier) | 0 |
| Failed | Invalid Voice Number (RP-Min) | Mobile number is invalid (not enough digits for the supplied network/carrier) | 0 |
| Failed | Bad Number (NRD) | Number is invalid (not owned by any network or carrier) | |
| Failed | Bad Number (OC) | Number is invalid (recipient's network or carrier rejected the call) | |
| Failed | Bad Number (Unallocated) | Number is invalid (recipient's network or carrier advises the number is unallocated/unused) | 1 |
| Failed | Bad Number / Congestion | Recipient's network or carrier is unresponsive (likely overloaded with no available capacity) | 1 |
| Failed | Bad Number/No Answer (EM) | Call completed with 0 second duration (likely an operator message stating the number is unavailable) | 1 |
| Failed | Bad Number/No Answer (NUR) | Number is invalid (the recipient's telephone equipment is disconnected) | |
| Failed | Bad Number/No Answer (RTE) | Recipient's network or carrier failed to connect the call | |
| Failed | Temporary Failure (CCD) | Recipient's network or carrier closed the connection when the number was dialled | 1 |
| Failed | Temporary Failure (CR) | Recipient's network or carrier advises the number is valid but is experiencing a temporary fault | 1 |
| Failed | Temporary Failure (NCC) | Recipient's network or carrier is unresponsive (likely overloaded with no available capacity) | 1 |
| Failed | Temporary Failure (NOOO) | Recipient's network or carrier is unresponsive (likely temporarily offline) | 1 |
| Failed | Temporary Failure (NTF) | Recipient's network or carrier advises the number is valid but is experiencing a temporary fault | 1 |
| Failed | Unspecified Hangup (NU) | Unknown failure reason (the Recipient's network or carrier is supplying an unknown error code) | |
| Failed | Call Timed Out | Recipient's network or carrier accepted the call but failed to route or reject the call (no result provided) | 1 |
| Failed | Bad Audio Format | Your submitted audio files are in an incompatible or corrupted format (should be WAV or MP3) | 0 |
| Failed | Job Aborted | Operator or User aborted the message | 0 |
| Failed | No Permit Record | Internal TNZ error; contact TNZ Support | 0 |
Retry Limit means the system will limit further retries to 1 attempt only.