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

ToC   3GPP‑Page   ETSI‑search   Help    
(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 Scope2 References3 Definitions and abbreviations3.1 Definitions3.2 Abbreviations4 Description4.1 Applicability to telecommunications services5 Normal procedures with successful outcome5.1 Provision5.2 Withdrawal5.3 Registration5.4 Erasure5.5 Activation5.6 Deactivation5.7 Invocation and operation5.8 Interrogation6 Exceptional procedures or unsuccessful outcome6.1 Registration6.2 Erasure6.3 Activation6.4 Deactivation6.5 Invocation and operation7 Interaction with other supplementary services7.1 Calling line identification presentation7.2 Calling line identification restriction7.3 Connected line identification presentation7.4 Connected line identification restriction7.5 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 waiting7.10 Call hold7.11 Multiparty services7.12 Closed user group7.13 Advice of charge services7.14 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 transfer7.20 Completion of calls to busy subscriber7.21 Customised Applications for Mobile network Enhanced Logic (CAMEL)7.22 Support of Private Numbering Plan (SPNP)8 Mobility aspectsA Cross Phase compatibilityA.1 Activation of a CCBS requestA.2 CCBS RecallA.3 InterrogationA.4 DeactivationB [N] Roaming to non-supporting networksB.1 Roaming into networks or registering in network entities not supporting CCBSC Change Request History


1  ScopePDF-p. 6
2  References
3  Definitions and abbreviationsPDF-p. 7
4  Description
5  Normal procedures with successful outcomePDF-p. 9
6  Exceptional procedures or unsuccessful outcome
7  Interaction with other supplementary services
8  Mobility aspectsUp
A  Cross Phase compatibilityPDF-p. 19
B (Normative)  Roaming to non-supporting networksPDF-p. 20
C  Change Request HistoryPDF-p. 21Up

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