How do I restore my original fax settings?

See below.

Resetting Control Panel Defaults

If you have a problem with settings on the product control panel, you can reset them to their factory defaults. You can choose which settings to reset or reset them all.

Note: This setting can be locked by an administrator. If you cannot access or change this setting, contact your administrator for assistance.

1. Press the  home button, if necessary.
2. Select Settings > General Settings > System Administration > Restore Default Settings. You see a screen like this:
   
   
3. Select one of these options:
   • Network Settings: Resets all network settings
   • Copy Settings: Resets all settings for copying
   • Scan Settings: Resets all settings for scanning
   • Fax Settings: Resets all settings for faxing
   • Clear All Data and Settings: Resets all control panel settings including the contacts list
   You see a confirmation screen.
4. Select Yes to reset the selected settings. (Select No if you want to cancel the operation.)