Panasonic KX-TD1232E Installation Manual page 152

C
C
ompletion of Calls to Busy Subscriber (CCBS)
Description
Conditions
3-50 Features
Allows the extension users to set the telephone to receive callback
ringing when a busy called party on an ISDN line becomes free. A
special dial tone informs the caller that the called party is busy.
When the caller answers the callback ringing, other party's number
is automatically dialled.
This feature is one of ISDN's services and its availability depends
on the service of your telephone company.
This feature is in accordance with the ETS 300 359.
(ETS: European Telecommunication Standard)
• This feature is enabled or disabled by System Programming.
• An extension can set only one CCBS at a time.
• A proprietary telephone (PT), single line telephone (SLT) and portable
station (PS) can set the CCBS to a busy party.
• The CCBS that has been set by an outside party works only if the called
busy extension is a PT or SLT and the call arrives via DIL 1:1, DDI 1:1
and MSN 1:1.
• If the callback ringing is not answered in four rings (within 10 seconds)
the callback is cancelled.
• The callback rings even if the extension has set the Call Forwarding or
Do Not Disturb (DND).
• The caller can use the telephone before the callback rings. The setting
is cancelled only in the following conditions.
– By the cancelling operation.
– If there is no callback ringing within 60 minutes.
– If the system power is off. / If you reset the system.
• This feature does not work if the extension has set Data Line Security.
• The time the system waits before sending a CCBS signal while hearing
a special dial tone is programmable.
• To activate this feature, use the following software version of the ISDN
Card or Unit.
ISDN Card / Unit Type
KX-TD280 / KX-TD281 /
KX-TD282
KX-TD286
KX-TD290
3 Features
Software Version
P071V / P072V or after
P831H / P832H or after
P851F / P852F or after