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Operation
30 User Manual
To cancel a callback ringing
Reserving a call to a busy party 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.
To answer while hearing a callback ringing
• If you do not answer within a specified time period, this feature will be cancelled. (Default:
10 seconds)
Off-hook.
PT/SLT
On-hook.
C.Tone
4 6
Enter 46.
PT/SLT/PS
On-hook.
While hearing a busy tone
C.Tone
Enter 6.
6
PT/SLT/PS
Off-hook.