Ericsson DIALOG 4220 - Manual (Page 32)

Outgoing Calls
Dialog 4220 Lite/Dialog 4222 Office 32
To assign your own authority level to another phone: *75*
Dial.
z *
Enter authorization code and press.
Verification tone. z #
Dial your own extension number and press.
Verification tone. z
Dial the digit or digits to get an external line and the external
number.
To change your individual authorization code: *74*
Dial.
z *
Enter old authorization code and press.
z #
Enter new authorization code and press.
Verification tone.