Avaya Integral 3 / 5 FC1 - Manual (Page 28)

The functions Integral 5
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Callback
The subscriber you are calling is busy. When you activate callback, you
receive a signal when the busy subscriber is once again free.
Switching on callback
The subscriber you are calling is busy.
O K
Menu Dialling options
O K O K
Menu Callback
O K
Confirm.
You will hear an acknowledgement tone. Callback appears briefly
in the display.
Replace the handset.
When the subscriber you want to call becomes free, your telephone
rings. Callback appears in the display.
Lift the handset The connection is made.
With internal calls you can also switch on callback if the person you are
calling does not answer.
Callback to external subscribers is only possible if supported by the net-
work operator and the system connection type.
Call diversions are not taken into account with callback.
If you do not pick up after a certain time while the handset is ringing, the
callback is cleared. The waiting period is set in the system.