User guide

43DT412/DT422/DT432
Outgoing Calls
When you receive a busy tone
If you call an extension and receive a busy tone, or get no
answer, or all external lines are busy, you can use any of the
following methods:
Callback
If a called extension is busy or there is no answer:
6 Press.
Note: France, Finland and Sweden, press
5
æ Press to finish the procedure.
You are called back (recall ring signal) when the ongoing call is
finished or the next time a new call is finished. You have to
answer within eight seconds, otherwise the Callback service is
cancelled. While waiting for the Callback, you can make and
receive calls as usual.
æ Press when you are called back.
The system calls the extension.
Note: Callbacks can be activated on several extensions
at the same time.