When sending Voice and TextToSpeech messages, there are a handful or potential result codes (defines if the message was delivered successfully or a failure).
| Status | Result | Explanation |
|---|---|---|
| Success | Sent Ok | Voice call received and answered successfully |
| Success | AnswerPhone | Voice call received and answered successfully by an answering machine/voicemail |
| Success | Fax Number | Voice call received and answered successfully by a fax machine or modem |
| Success | Max Duration | Voice call received and answered successfully and the Max Duration limit (LIM and/or LIMB) was reached |
| Failed | No Answer | Call unanswered within 60 seconds |
| Failed | Busy | Recipient responded with Busy tone |
| Failed | Bad Audio Format | Your submitted audio files are in an incompatible or corrupted format (should be WAV or MP3) |
| 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) |
| Failed | Bad Number/No Answer (NUR) | Number is invalid (the recipient's telephone equipment is disconnected) |
| Failed | Invalid Voice Number (RP-Min) | Mobile number is invalid (not enough digits for the supplied network/carrier) |
| Failed | Invalid Voice Number (RP-Max) | Mobile number is invalid (too many digits for the supplied network/carrier) |
| Failed | Temporary Failure (CR) | Recipient's network or carrier advises the number is valid but is experiencing a temporary fault |
| Failed | Temporary Failure (NTF) | Recipient's network or carrier advises the number is valid but is experiencing a temporary fault |
| Failed | Call Timed Out | Recipient's network or carrier accepted the call but failed to route or reject the call (no result provided) |
| Failed | No Permit Record | Internal TNZ error; contact TNZ Support |