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1.2 Making Calls
User Manual 29
To answer (if set when seizing an outside line)
To cancel callback ringing (Automatic Callback Busy Cancel)
Setting Callback on an ISDN Line (Completion of Call to Busy
Subscriber [CCBS])
You can set the telephone to receive callback ringing when a busy called party on an ISDN line
becomes free.
When you answer the callback ringing, the called party’s telephone number is automatically dialled.
• If you do not answer within 10 seconds, this feature will be cancelled.
Off-hook.
PT/SLT/PS
Talk.
Dial outside phone
number.
outside
phone no.
While hearing a callback ringing
Off-hook.
PT/SLT/PS
On-hook.
4 6
Enter 46.
C.Tone
PT/SLT/PS
On-hook.
While hearing a busy tone
Enter 6.
6
C.Tone