1.2 Making Calls
40 User Manual
1.2.4 When the Dialled Line is Busy or There is No Answer
– Reserving a Busy Line (Automatic Callback Busy)
– Setting Callback on an ISDN Line (Completion of Calls to Busy Subscriber [CCBS])
– Sending a Call Waiting Notification (Call Waiting)
– Leaving a Message Waiting Indication/Calling Back the Caller Who Left an Indication (Message
Waiting)
– Joining an Existing Call (Executive Busy Override)
– Monitoring Another Extension (Call Monitor)
– To an Extension Refusing the Call (DND Override)
Reserving a Busy Line (Automatic Callback Busy)
You can set the telephone to receive callback ringing:
• when a dialled extension becomes idle.
• when your desired outside line that is in use by another extension becomes idle.
You cannot set Automatic Callback Busy for a busy party outside of the PBX.
When you answer the callback ringing:
• For an outside call: The line is seized.
• For an intercom call: The called extension starts ringing automatically.
To set (for both extension and outside line)
To answer the callback ringing from an idle extension
PT/SLT/PS
While hearing a busy tone
Enter 6.
6
On-hook.
C.Tone
Off-hook.
PT/SLT/PS
Talk.
While hearing a callback ringing
R.B.Tone
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