Prerequisite: you must have dialed an internal number and you must hear a busy signal. You urgently need to reach the called party.
Press these keys. The LED lights up.
or
Select and confirm.
or
Enter the code.
The called party and the other party hear a warning tone every two seconds. If the called party has a system telephone with a display, the message "Override: (station no. or name)" appears on the screen.
