Fax - Errors
Outbound Programmable Fax Errors
Error | Description |
file_size_limit_exceeded | Error from Telnyx programmable FAX Application indicating the .pdf file provided is greater in size than the prescribed limits. (i.e. bigger than 50MB) |
page_count_limit_exceeded | Error from Telnyx programmable FAX Application indicating the .pdf file provided is containing more number pages than the prescribed limits. (i.e. more than 350 Pages) |
fax_initial_communication_timeout | This may indicate that the call did not connect to a valid fax machine/the destination is not sending fax tones. |
fax_signaling_error | Error from Telnyx Telephony Engine. Includes scenarios such as no response after sending a page, invalid ECM response received from receiver, received bad response to DCS or training. |
file_download_failed | The non-telephony service responsible for downloading the customers PDF prior to initiating the fax was unable to download the file. Please make sure there are no redirect responses (3XX HTTP) only 2XX HTTP responses will ensure we download your file and process it. |
file_format_invalid | The customer file format is not PDF or is invalid PDF. |
receiver_call_dropped | Error from Telnyx Telephony Engine. The call dropped prematurely. |
receiver_communication_error | Error from Telnyx Telephony Engine. Can include general call failure or a telephony routing error. |
receiver_decline | Error from Telnyx Telephony Engine. The destination declined the call attempt. |
receiver_invalid_number_format | Error from Telnyx Telephony Engine. The destination number is not in valid +E.164 format. |
receiver_no_response | Error from Telnyx Telephony Engine. This cause is used when a called party does not respond to a call establishment message with either an alerting or connect indication within the prescribed period of time allocated. |
receiver_recovery_on_timer_expire | Error from Telnyx Telephony Engine. Remote party sends a 408 for call expired or issue with downstream carrier partner. |
receiver_unallocated_number | Error from Telnyx Telephony Engine. This cause indicates that the called party cannot be reached because, although the called party number is in a valid format, it is not currently allocated (assigned). |
service_unavailable | Internal Telnyx error. A call to another service, such as to initiate the outbound call or to retrieve the PDF for sending failed. Could also be due to a non-typical media conversion failure. |
success | Telnyx to investigate this further. |
Retries for outbound faxes which may result in an error must be configured on the client application, Telnyx does not automatically retry faxes with errors.
Inbound Programmable Fax Errors
Error | Description |
carrier_lost | Connection to carrier dropped while receiving the fax |
fax_signaling_error | Error from Telnyx Telephony Engine. Similar to outbound error but in reverse. Includes scenarios such as no further data after receiving a page, ECM issue, bad data sent from sender etc. |
received | Telnyx to investigate this further. |
sender_call_dropped | Error from Telnyx Telephony Engine. The call dropped prematurely. |
sender_canceled | Error from Telnyx Telephony Engine. The sender canceled the call prematurely or before data had completed transmitting. |
sender_communication_error | Error from Telnyx Telephony Engine. Can include general call failure or a telephony routing error on the sender side. |
Other Fax Errors Include:
account_disabled
connection_channel_limit_exceeded
destination_invalid
destination_not_in_countries_whitelist
destination_not_in_service_plan
destination_unreachable
invalid_ecm_response_from_receiver
no_outbound_profile
outbound_profile_channel_limit_exceeded
outbound_profile_daily_spend_limit_exceeded
receiver_incompatible_destination
receiver_no_answer
user_busy
user_channel_limit_exceeded
fax_initial_communication_timeout