Panasonic KX-FB421 - Manual (Page 18)

Connections and Setup
18
For fax advantage assistance, call 1-800-435-7329.
Case 2: One line used for fax only
Your situation
You wish to use the fax machine only for fax
reception/transmission.
Telephone wiring image in
house or office
Connections
Fax machine
Telephone
line cord
To a single
telephone line
jack (RJ11C)
To a power
outlet
(120 V, 60 Hz)
Power cord
Connect to LINE.