Olivetti D-COLOR MF2604en Operation Manual page 56

FAX Operation (Basic)
Selecting a Destination by One-touch Key
In the destination entry screen, press the One-touch
key where the destination is registered.
When recalling from One-touch keys 12 to 22, press
the Shift Lock key to turn on the lamp next to the keys,
and then press the One-touch key where the
3
destination is registered.
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