Aastra Dialog 4425 IP Vision User Manual page 43

Outgoing Calls
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u
#37* z #
#37#
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Call Waiting
44
Replace the handset to finish the procedure.
When an external line becomes free you will be called back (recall
ring signal). 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.
Lift the handset when you are called back.
The system calls the external number.
Note: Only one Callback can be activated on a busy
external line.
Cancel any single Callback
Dial, enter the extension number and press.
Note: To cancel a single Callback on a specific external
line, dial the digit or digits to get a line instead of the
extension number.
Call
Press.
Cancel all Callbacks
Dial.
Call
Press.
Activate Call Waiting
If you urgently wish to contact a busy extension or external line, you
can notify by a Call Waiting signal.
Press,
5
or
press.
Note: You can also press:
Keep handset off hook. When the called extension or the external
line becomes free, it will be called automatically.
(see display).
CallWaiting
Dialog 4425 IP Vision