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To answer the callback ringing from an idle outside line
Off-hook.
PT/SLT/PS
Talk.
Dial outside phone
number.
outside
phone no.
While hearing a callback ringing
• If you do not answer the callback ringing within 10 seconds, this feature will be cancelled.
To cancel callback ringing (Automatic Callback Busy Cancel)
Off-hook.
PT/SLT/PS
On-hook.
4 6
Enter 46.
C.Tone
Setting Callback on an ISDN Line (Completion of Calls 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.
PT/SLT/PS
On-hook.
While hearing a busy tone
Enter 6.
6
C.Tone
42 User Manual
1.2.4 When the Dialled Line is Busy or There is No Answer