When registering a recipient to the contacts list, you can select IP-FAX as the line setting.
Enter the printer's IP address into a browser to access Web Config.
Enter the printer's IP address from a computer that is connected to the same network as the printer.
You can check the IP address of the printer from the following menu.
Settings > General Settings > Network Settings > (Standard) > Network Status > Wired LAN/Wi-Fi Status
Enter the administrator password to log in as an administrator.
Select in the following order.
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 Type for the Fax.
You cannot change the Type option after registration is complete. If you want to change the type, delete the destination and then register again.
Select IP-LAN in Select Line.
Make sure you select IP-LAN.
Enter the destination in SIP URI
Set the other items as necessary, and then click Apply.