If a fax transmission fails due to a line or recipient machine problem, the machine automatically resends (redials) the fax after certain time has elapsed.
Resending a Fax that Failed in Redialing (Here)
A failed fax transmission is handled as a reserved job pending for resending (redial).
Pending jobs for resending are resent automatically after a certain period of time has elapsed using the auto redial function. However, you can manually resend the fax.
Tap [Job List] on the home screen.
Select a job you wish to resend, and also tap [Redial].