Panasonic KX-F580 Operating Instructions Manual page 24

Setting the silent fax recognition ring count
When a fax call is received in the TEL/FAX mode, the unit will automatically activate the fax function without
ringing. If the unit detects a voice call, it will ring. You can choose from 3 to 6 rings.
1
Press MENU .
2
Press , then
3
Press START/COPY/SET
4
Press or
5
Press START/COPY/SET
6
Press MENU .
24
SYSTEM SET UP
3 0
.
SILENT FAX RING
.
RING=3
to select the desired setting.
.
Dial keypad
MENU
1 2 3
4 5 6
7 8 9
0
START/COPY/SET