Panasonic kx-td816ne Operating Guide

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2.2
Making Calls
Operation
35
 Completing a call to a busy party on an ISDN line (Completion of Calls to 
Busy Subscriber [CCBS])
You can set the telephone to receive call-back ringing when a busy called party on an ISDN line 
becomes free. When you answer the call-back ringing, the called party's telephone number is 
automatically dialled.
 To answer and call
 To cancel
If you connect to an ISDN line, the busy party will automatically be dialled.
"CCBS" will be displayed instead of "C.BCK". Refer to "Completing a call to a busy party on 
an ISDN line".
Press “CCBS” or dial 6.
On-hook.
OR
C.Tone   
PT / SLT
CCBS
6
While hearing a indication tone*
Off-hook.
PT / SLT
Off-hook.
Dial 713
On-hook.
PT / SLT
C.Tone   
7
1
3