Lexmark Pro4000 Series User Manual page 100

Faxing 100
Can I retrieve failed faxes?
The printer saves an incoming fax in the printer memory before it prints the fax. If the printer runs out of ink or runs
out of paper, then the printer will automatically print the fax after the error is resolved.
If a fax was not sent or received due to power loss, then the printer will automatically send any outgoing faxes or print
any incoming faxes that were saved in the printer memory when the power is restored.