Olivetti D-COLOR MF2604en Operation Manual page 74

Using the Remote Switch Dial
To start fax reception by operation from the connected telephone set, use the following operation.
1
The connected telephone set makes a ringing
tone.
2
Lift the handset of the telephone.
3
When you hear the fax tone from the handset,
enter the two-digit remote switch dial number using
the dial button on the telephone set.
NOTE:
The remote switch dial is set to 55 at the
factory.
4
The telephone line switches to the machine, and
reception starts.
4-15
FAX Operation (Advanced)
4