Ericsson DIALOG 4220 - Manual (Page 29)

29 Dialog 4220 Lite/Dialog 4222 Office
Outgoing Calls
Authority
Data privacy
Data privacy allows you to make a call without any disturbances,
i.e. Intrusion. This function is automatically cancelled when the call
is finished.
To order: u
Lift the handset.
*41# z
Dial and enter the number.