AASTRA 4223 Professional for BusinessPhone User Guide - Manual (Page 107)

107 BusinessPhone — Dialog 4223 Professional / Dialog 3213
Settings
Ringing character
character
Press (see display).
You will hear the selected character.
next
Press to change (see display).
í
Press to finish the procedure.
Melody programming
If you want a personal melody when your telephone rings, this can
be programmed for internal, external or Callback calls.
Note: This function requires a certain release number of
your telephone (for the Dialog 4223 Professional/Dialog
3213 it is R9B or higher, see the underside of your
telephone). If you can enter Melody Mode your telephone
supports this function.
Melody Mode í *7
Press and hold to enter Melody Mode.
Enter Programming Mode to program a melody.
Or: #
Press to exit Melody Mode.
Melody Mode