You can send IP faxes by specifying a line and entering the destination from the printer’s control panel.
The basic method for sending faxes is the same as for standard faxing.
Place the originals.
Select Fax on the home screen on the printer's control panel.
Specify the recipients to send the fax to on the Recipient tab.
To enter the destination manually, select Enter Directly, and then from Select Line, select the IP-FAX line. Next, enter the destination directly using the numerical keypad on the screen, and then tap OK to complete.
You cannot directly enter a destination that contains characters that cannot be entered using the numeric keypad. Register the address to your contacts list in advance, and then specify the destination from the contacts list.
When Security Settings in Direct Dialing Restrictions is enabled, you can only select fax recipients from the contacts list or the sent fax history. You cannot manually enter the destination.
You can send faxes when Transmission Setting By Line is set to Sending and Receiving or Sending Only. You cannot send faxes when you select a line that is set to receive faxes only.
See the following link for information on how to specify a destination other than by direct input.
Select the Fax Settings tab, and then make settings such as the resolution and the sending method as necessary.
Tap 
to start sending the fax.