Samsung CLX-8380ND - Manual (Page 126)

14.3
Enabling Fax feature after installing the fax
option kit
After installing the Fax kit, you have to set up the machine in order to use
this function.
1 Press Machine Setup on the control panel.
2 Press Admin Setting.
3 When the login message appears, enter password with number
keypad and press OK. (Page 3.5)
4 Press the General tab.
5 Press the Country.
Change the country, then some the values for fax and paper size will
be changed automatically for your country.