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TS 02.93 (SA1)
CCBS – Completion of Calls to Busy Subscriber Service description Stage 1

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(P) GSM Rel-98 v7.0.0    1999/06    22 p.
(P) GSM Rel-97 v6.0.1    1998/04    19 p.

Rapporteur:  SCARRONE, Enrico
Descendant:  TS 22.093    
See also:  CCBS-related TS/TR    

This TS specifies the stage 1 description of Completion of Calls to Busy Subscriber (CCBS) from the subscriber's and user's points of view.

Here is a short description of the CCBS service:
  • When subscriber A encounters a Network Determined User Busy (NDUB) destination B, subscriber A can request the CCBS supplementary service (i.e. activate a CCBS Request against destination B). The network will then monitor the wanted destination B for becoming idle.
  • When the wanted destination B becomes idle, then the network will wait a short time in order to allow destination B to make an outgoing call. If destination B does not make any outgoing call within this time, then the network shall automatically recall subscriber A.
  • When subscriber A accepts the CCBS recall, within a defined time, then the network will automatically generate a CCBS call to destination B.
  • CCBS has to be supported by the originating, as well as by the terminating network.


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1 Scope    2 References    3 Definitions and abbreviations    3.1 Definitions    3.2 Abbreviations    4 Description    4.1 Applicability to telecommunications services    5 Normal procedures with successful outcome    5.1 Provision    5.2 Withdrawal    5.3 Registration    5.4 Erasure    5.5 Activation    5.6 Deactivation    5.7 Invocation and operation    5.8 Interrogation    6 Exceptional procedures or unsuccessful outcome    6.1 Registration    6.2 Erasure    6.3 Activation    6.4 Deactivation    6.5 Invocation and operation    7 Interaction with other supplementary services    7.1 Calling line identification presentation    7.2 Calling line identification restriction    7.3 Connected line identification presentation    7.4 Connected line identification restriction    7.5 Call Forwarding Unconditional (CFU)    7.6 Call Forwarding on mobile subscriber Busy (CFB)    7.7 Call Forwarding on No Reply (CFNRy)    7.8 Call Forwarding on mobile subscriber Not Reachable (CFNRc)    7.9 Call waiting    7.10 Call hold    7.11 Multiparty services    7.12 Closed user group    7.13 Advice of charge services    7.14 Barring of All Outgoing Calls (BAOC)    7.15 Barring of Outgoing International Calls (BOIC)    7.16 Barring of Outgoing International Calls except those directed to the Home PLMN Country (BOICexHC)    7.17 Barring of All Incoming Calls (BAIC)    7.18 Barring of Incoming Calls when roaming outside the home PLMN country (BIC-Roam)    7.19 Explicit call transfer    7.20 Completion of calls to busy subscriber    7.21 Customised Applications for Mobile network Enhanced Logic (CAMEL)    7.22 Support of Private Numbering Plan (SPNP)    8 Mobility aspects    A Cross Phase compatibility    A.1 Activation of a CCBS request    A.2 CCBS Recall    A.3 Interrogation    A.4 Deactivation    B [N] Roaming to non-supporting networks    B.1 Roaming into networks or registering in network entities not supporting CCBS    C Change Request History   


1   Scope   PDF-p. 6
2   References
3   Definitions and abbreviations   PDF-p. 7
4   Description
5   Normal procedures with successful outcome   PDF-p. 9
6   Exceptional procedures or unsuccessful outcome
7   Interaction with other supplementary services
8   Mobility aspects      Up
A   Cross Phase compatibility   PDF-p. 19
B  (Normative)   Roaming to non-supporting networks   PDF-p. 20
C   Change Request History   PDF-p. 21      Up

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