Canon Color imageCLASS MF9280Cdn - Manual (Page 305)

Fax
5-84
Checking the Dial Tone before Sending
6
Use [ ▼], [▲] or (Scroll Wheel) to select
<Check Tone Before Sending>, then press
[OK].
7
Use [ ▼], [▲] or (Scroll Wheel) to select
<Off> or <On>, then press [OK].
8
Press (Main Menu) to return to the
Main Menu screen.