Sharp FO-4700 Operation Manual page 17

Connecting the telephone line cord
Insert one end of the line cord into the jack on the back of the machine
marked TEL. LINE. Insert the other end into a standard (RJ11C)
single-line wall telephone jack.
Note: The fax machine is set for touch-tone dialing. If you are on a pulse
dial (rotary) line, you must set the fax machine for pulse dialing by
changing Option Setting 22. This procedure is described in Chapter 6,
Optional Settings.
Connecting a telephone (optional)
If desired, you can connect a telephone to the TEL. SET jack on the
back of the machine.
Connections
15