Completion Of Calls To Busy Subscriber (Ccbs) - Panasonic KX-TD816JT Features Manual

2.1 Changed and Added Features

Completion of Calls to Busy Subscriber (CCBS)

Description
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)
Conditions
• This feature is enabled or disabled by System Programming. <[991] COS Additional
Information, COS 5-Bit 9>
• 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. <[991] COS Additional Information, COS 5-Bits 10-11>
• To activate this feature, use the following software version of the ISDN Card or Unit.
ISDN Unit Type
KX-TD280
KX-TD286
KX-TD290
22
Software Version
P071V / P072V or after
P831H / P832H or after
P851F / P852F or after
Features Guide