Aastra M401 User Manual page 30

6.2.3 Forwarding your calls on busy
To forward all your calls to your voice mailbox when your extension is busy.
On your keypad:
Press the following keys consecutively
You will hear two beeps.
Hang up.
Please note:
You can forward:
- external calls only,
- internal calls only.
For further details, consult your telecom administrator.
6.3 OVERRIDING THE CALL FORWARDING FUNCTION
You wish to reach someone and his/her extension is forward. You can override the call
forwarding function and ring the extension.
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