You can find the menu on the printer's control panel below.
Settings > General Settings > Fax Settings > Security Settings
Note:
On the Web Config screen, you can find the menu below.
Fax tab > Security Settings
Security Settings
Direct Dialing Restrictions
Selecting On disables manual entry of the recipient's fax numbers allowing the operator to select recipients only from the contacts list or sent history.
Selecting Enter Twice requires the operator to enter the fax number again when the number was manually entered.
Selecting Off enables manual entry of the recipient's fax numbers.
Broadcasting Restrictions
Selecting On allows only one fax number to be entered as the Recipient.
Confirm Address List
Selecting On displays a recipient confirmation screen before starting the transmission.
You can select the recipients from All or Only for Broadcasting.
Backup Data Auto Clear
Backup copies of sent and received documents are usually temporarily stored in the printer's memory to prepare for an unexpected power failure due to an electricity failure or incorrect operations.
Selecting On automatically erases the backups when sending or receiving a document completes successfully and the backups become unnecessary.
Clear Backup Data
Erases all backup copies temporarily stored in the printer's memory. Run this before you give the printer to someone else or dispose of it.
This menu is not displayed on the Web Config screen.