Sharp FO-90 Operation Manual page 18

Connecting the telephone line cord
Insert one end of the line cord into the socket on the back of the
machine marked TEL. LINE. Insert the other end into a wall
telephone socket.
Note: The fax machine is set for tone dialling. If you are on a pulse
dial line, you must set the fax machine for pulse dialling. Press the
keys on the operation panel as follows:
1
Press these keys:
The display will show:
DIAL MODE
2
Press 1 to select tone dialling, or 2 to
select pulse dialling.
3
Press the STOP key to return to the
date and time display.
FUNCTION
4
TONE
Connections
PULSE
1 2
or
STOP
17