Solution
* This setting may be unavailable depending on the country where you are using the machine.
If you cannot send a fax, however, change the setting.
If you are not sure about your telephone line type, contact your local telephone company.
How to display the settings
[

] (menu) -> <Send/Receive Settings> -> <Fax Settings> -> <Basic Settings> -> <Select Line Type>

Settings
Default settings:Tone
(The value varies depending on the country where you are using the machine.)
Specify when you are using the dial-line.
Specify when you are using the tone-line.