Ericsson 4187 Plus - Manual (Page 34)

Outgoing Calls
Dialog 4187 Plus 34
To assign your own authority level to another phone: u
Lift the handset. *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: u
Lift the handset. *74*
Dial.
z *
Enter old authorization code and press.
z #
Enter new authorization code and press.
Verification tone.