Ericsson DIALOG 4220 - Manual (Page 22)

Outgoing Calls
Dialog 4220 Lite/Dialog 4222 Office 22
Save external number
When you make an external call, you can save the number in order
to redial the same number easily. Any previously saved number is
erased.
To save an external number:
Redial
Ô
Press before you finish the call.
Note: Function key preprogrammed by your system
administrator.
Redial number u
Lift the handset.
Redial
Ô
Press to redial the number.
Note: Function key preprogrammed by your system
administrator.