AASTRA 600d for Aastra 800 and OpenCom 100 User Guide EN - Manual (Page 90)

Telephoning
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Callback
If you call another subscriber of your Aastra 800 / OpenCom 100 communications
system and the line is busy, you can initiate automatic callback. Your user group must
have authorisation for this feature to be able to use it.
Initiate callback
Answering a callback
A callback is carried out when the other subscriber is free.
Baby Call
The “Baby call” function dials a previously programmed internal or external call
number a specific time interval after pressing the
call key (please refer to
page 124). The default time interval on the communications system is 5 seconds. The
system administrator can change this value. If you begin dialling a call number within
the specified time interval, the baby call is cancelled.
Carrying out a baby call
Note
You can also programme an emergency call number on your mobile unit. In contrast
to the baby call, an emergency call is executed immediately (please refer to page 50
also).
Press softkey briefly.
/ Use the navigation keys to select the Callback menu entry and
confirm with the Ok softkey.
When your telephone rings:
Press call key.
The other subscriber is now called.
Press call key.