Top Page > Connecting the Machine/System settings > Registering Addresses and Users for Facsimile/Scanner Functions > Fax Destination > Changing a Registered IP-Fax Destination > To set the International TX Mode for IP-Fax destination
Press [International TX Mode] under [Fax Dest.].
Select [Off] or [On], and then press [OK].
Press [Exit].
Press [OK].