When registering a recipient to the contacts list, you can also add the line setting.
On a computer connected to the same network as the printer, open a browser and enter the printer's IP address.
You can check the printer's IP address using the following menu.
Enter the administrator password to log in as an administrator.
Select the following menu.
Scan/Copy tab or the Fax tab > Contacts
Select the number that you want to register, and then click Edit.
Enter the Name and Index Word.
Select Fax as the Type option.
You cannot change the Type option after registration is complete. If you want to change the type, delete the destination and then register it.
Select a line in Select Line, enter the fax number in Fax Number, and then click Apply.
Note that Select Line is set to G3-Auto by default.