Press the key.
The number of waiting external calls appears on the
If you are already engaged in a call and the number of
waiting calls exceeds a certain threshold value (over-
load; contact Customer Support), the LED on the key in-
No callers are waiting.
LED is flashing slowly:
The number of calls waiting has reached the pre-de-
fined threshold value.
LED is flashing rapidly:
The threshold value has been exceeded (overload).
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.
Select and confirm.
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 dis-
play, the message "Override: (station no. or name)" ap-
pears on the screen.
You can begin speaking immediately.