Canon MX390 series Online Manual page 14

When receiving
voice calls (with a
telephone or
answering machine
DRPD or connected to the
Network machine) and
switch subscribing to a ring
pattern detection
service provided by
your telephone
company:
Fax only When not receiving
mode voice calls:
When a call incomes, the telephone will ring. The machine detects a
fax call by the fax ring pattern.
If the call is a fax, the machine will receive the fax automatically.
If the machine does not detect the fax ring pattern, the telephone will
continue ringing.
Note
You can select the ring pattern assigned to the fax number (for
DRPD) and change the number of times to ring the telephone.
Advanced setting in DRPD
Advanced setting in Network switch
The telephone may not ring when a call incomes even if it is
connected to the machine, depending on the type or settings of
the telephone.
When a fax incomes, the machine will receive the fax automatically.
Note
You can change the number of times to ring the telephone (for
Incoming ring).
Advanced setting in Fax only mode