As per this https://www.ringcentral.com/blog/know-fax-transmission-api-succeeded/ :

“Sent” means that message was sent successfully

In general Fax can be viewed in the Service Web Portal (https://service.ringcentral.com) in both Messages > Sent Items and in the Call Log.

If a fax transmission fails, the reason is reported in the Call Log Record's result property. It is also presented in the Service Web Portal. All the Fax question are answered here and the following link will be helpful:

ref: https://forums.developers.ringcentral.com/questions/144/fax-faq.html

As per this link https://ringcentral-faq.readthedocs.io/en/latest/fax/

To resend a fax, call the fax endpoint with the originalMessageId property

You can also use this API for resending and retrying fax and changing the number of retries :

https://developers.ringcentral.com/guide/messaging/fax/resending-faxes

ref: https://forums.developers.ringcentral.com/questions/528/controlling-the-number-of-fax-retries-using-api.html

Hi,

I had already read some of the pages you referred me to and unfortunately they (and the new ones you referred me to), do not actually answer my questions. Thank you for your help however...

I must provide to my users the same functionality they had before so asking them to look at a web page on this site to get their fax status and asking them to manually update the fax statuses in our legacy applications is unfortunately out of the question.

By default, how many times does RingCentral try to send a fax before giving up? I doubt it only tries one time and I have to programmatically or manually try to ask for a retry...

Maybe one of the pages you referred me to initially had the answer but one of the links you provided me with (https://ringcentral-faq.readthedocs.io/en/latest/fax/) first link gives me a 404.

(http://success.ringcentral.com/articles/en_US/RC_Knowledge_Article/7027)

Like I said before the 6 statuses are documented but only explanations are only given for like 3 of them, are the others legacy stuff?

Thank you and have a nice day,

Nick

Basically, for outbound fax status, you will receive just the following status:

Queue: your fax is in a queue waiting for to be sending

Sent: You fax has been sent

SendingFailed: Your fax sending failed.