Canon 3170 Series - Manual (Page 71)

2-40 Setting Up Chapter 2
LASER CLASS 3170 Series.
CFYA/YAH/YAN 120v US V1.0
3. Connect the other end of the telephone line to your wall telephone
jack.
If you have installed the optional Dual-line Upgrade Kit, you can
connect another telephone line to the fax unit. (
➞2-54)
Connecting an Extension Phone
To connect an extension phone to the fax, you have to use the extension
phone jack.
Only one jack is provided to be used with the optional handset or an
extension phone. A separate jack is not provided for an extension phone.
Connect the extension phone cord to the extension phone jack
marked with the handset icon (
).