1.28 Networking Features
1.28.3.5Completion of Calls to Busy Subscriber (CCBS)—by
QSIG
Description
If the call has been made to an extension in another PBX in QSIG network and the called party is busy, an extension user can set to receive callback ringing when the called party becomes free. When the user answers the callback ringing, that party's number is automatically dialled.
This feature complies with the following European Telecommunication Standard (ETS) specifications: ETS 300 366 Call completion supplementary services.
Conditions
•This feature is available under the following conditions:
a)The caller’s PBX is capable of using CCBS.
b)The called party's PBX is capable of accepting CCBS.
•To receive and send CCBS, receiving and sending CCBS must be enabled individually on an ISDN (QSIG) port basis through system programming.
•An extension user can set only one CCBS. The last setting is effective.
•The CCBS setting is cancelled if there is no callback ringing within 60 minutes or callback ringing is not answered within 10 seconds.
User Manual References
User Manual
1.2.4 When the Dialled Line is Busy or There is No Answer
