Fax Error Messages
What do the fax error messages mean?
When bulk fax is sent unsuccessfully the receiving machine provides a fax error code output to let the bulk fax service understand the reason for failure.
This error code, or error message, helps the bulk fax service determine whether or not the number should be retried, delayed, or removed from the sending list.
Within your Fax reports, you’ll find an Undelivered section which will provide you with information about why the fax message was not delivered, including the error code/message.
We’ve compiled a list of current fax transmission error codes that you may see during your Fax campaigns, as well as a brief explanation for each to give you a better idea of what they mean.
| There was no receiver on the other end of the call to connect to. | |
| Document generation error | There was an error while generating the document. This could be due to the file being deleted before sending. | |
| Failed to train with any of the compatible modems | A remote fax machine was detected, but the sending and receiving modems could not establish communication. | |
| We could not detect a remote fax machine. This could be due to there being no fax machine on the receiving end or a lack of call clarity. | |
| Log entry lost | The call started, but the log entry for the call was lost / incomplete. In practice, this should be rare and may indicate a system problem. | |
| The remote fax machine did not acknowledge that a page of the fax was received. Depending on the remote machine’s behavior, it may have still printed the page and any preceding pages. | |
| The bulk fax service could not successfully determine the remote machine’s fax capabilities. | |
| The call dropped due to a non-fax transmission error. It is likely that the receiver hung up. | |
| The fax service initiated a fax transmission with the receiver, but there was a synchronization (timing) error that could not be resolved. | |
| Timed out waiting for initial communication | A call was established with the receiver and the bulk fax service attempted to establish a fax session, but there was no fax response from the receiver. This could be due to there being no fax machine on the receiving end or a lack of call clarity. | |
| Timed out waiting for the first message | A call was established with the receiver and the fax service attempted to establish a fax session, but there was no fax response from the receiver. This could be due to there being no fax machine on the receiving end or a lack of call clarity. | |
| Unexpected DCN while waiting for DCS or DIS | The remote fax machine unexpectedly sent a disconnect message when the fax service asked for the remote fax machine’s fax capabilities. | |
| Received bad response to DCS or training | An unexpected message was received when the bulk fax service asked for the remote fax machine’s fax capabilities. | |
| Invalid response after sending a page | An unexpected message was received after successfully sending a page. Depending on the remote machine’s behavior, it may have still printed the sent page and any preceding pages. | |
| Disconnected after permitted retries | The fax service attempted to send the same message multiple times unsuccessfully. This may be due to a call clarity issue. | |
| Far end cannot receive at the resolution of the image | The remote fax machine does not support receiving faxes sent at the resolution that our service sends at. | |
| Received a DCN from remote after sending a page | The remote fax machine responded with a disconnect message after a page was sent successfully. Depending on the remote machine’s behavior, it may have still printed the sent page and any preceding pages. | |
| Unexpected message received | The fax service received a message that it did not expect given the current context. | |
| Received other than DIS while waiting for DIS | The fax service expected to receive the remote fax machine’s fax capabilities but received an unexpected message instead. | |
| Unexpected DCN after EOM or MPS sequence | The remote fax machine disconnected unexpectedly after receiving a page of a multipage fax. Depending on the remote machine’s behavior, it may have still printed the sent page and any preceding pages. | |
| Document loading error. | The fax service attempted to generate the message to send, but a document was missing. | |
| Invalid ECM response received from receiver | The fax service received an invalid error correction message from the remote fax machine. | |
| Unexpected DCN after RR/RNR sequence | The remote fax machine disconnected unexpectedly after indicating that it was not ready to initiate a fax session. |
