0.1 References

24.0823GPPCall Forwarding (CF) Supplementary ServicesRelease 17Stage 3TS

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.

– References are either specific (identified by date of publication, edition number, version number, etc.) or non‑specific.

– For a specific reference, subsequent revisions do not apply.

– For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.

[1] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications".

[2] 3GPP TS 22.001: "Principles of circuit telecommunication services supported by a Public Land Mobile Network (PLMN)".

[3] 3GPP TS 22.004: " General on supplementary services".

[4] 3GPP TS 22.081: "Line identification supplementary services ‑ Stage 1".

[5] 3GPP TS 22.082: " Call Forwarding (CF) supplementary services ‑ Stage 1".

[6] 3GPP TS 22.083: " Call Waiting (CW) and Call Hold (HOLD) supplementary services ‑ Stage 1".

[7] 3GPP TS 22.084: " MultiParty (MPTY) supplementary services ‑ Stage 1".

[8] 3GPP TS 22.085: " Closed User Group (CUG) supplementary services ‑ Stage 1".

[9] 3GPP TS 22.086: " Advice of Charge (AoC) supplementary services ‑ Stage 1".

[10] 3GPP TS 22.088: "Call Barring (CB) supplementary services ‑ Stage 1".

[11] 3GPP TS 22.090: "Unstructured Supplementary Service Data (USSD) – Stage 1".

[12] 3GPP TS 23.002: "Network architecture".

[13] 3GPP TS 23.011: "Technical realization of supplementary services".

[14] 3GPP TS 23.081: "Line identification supplementary services ‑ Stage 2".

[15] 3GPP TS 23.082: "Call Forwarding (CF) supplementary services ‑ Stage 2".

[16] 3GPP TS 23.083: "Call Waiting (CW) and Call Hold (HOLD) supplementary services ‑ Stage 2".

[17] 3GPP TS 23.084: "MultiParty (MPTY) supplementary services ‑ Stage 2".

[18] 3GPP TS 23.085: "Closed User Group (CUG) supplementary services ‑ Stage 2".

[19] 3GPP TS 23.086: "Advice of Charge (AoC) supplementary services ‑ Stage 2".

[20] 3GPP TS 23.088: "Call Barring (CB) supplementary services ‑ Stage 2".

[21] 3GPP TS 23.090: "Unstructured supplementary services operation ‑ Stage 2".

[22] 3GPP TS 24.002: "GSM-UMTS Public Land Mobile Network (PLMN) Access Reference Configuration".

[23] 3GPP TS 24.007: "Mobile radio interface signalling layer 3; General aspects".

[24] 3GPP TS 24.008: "Digital cellular telecommunications system (Phase 2+); Mobile radio interface layer 3 specification".

[25] 3GPP TS 24.010: "Digital cellular telecommunications system (Phase 2+); Mobile radio interface layer 3 Supplementary services specification; General aspects".

[26] 3GPP TS 24.080: "Digital cellular telecommunications system (Phase 2+); Mobile radio interface layer 3 supplementary services specification Formats and coding".

0.2 Abbreviations

Abbreviations used in the present document are listed in 3GPP TR 21.905.

0.3 Cross phase compatibility

For the following supplementary services, a number of changes exist between the present document and the protocol version 1 specification:

– Call forwarding unconditional;

– Call forwarding on mobile subscriber busy;

– Call forwarding on no reply;

– Call forwarding on mobile subscriber not reachable.

For these supplementary services, the main body of the present document assumes that all network entities comply with this version of the service. In each case, an additional subclause (subclause x.7) defines the additional requirements for when one or more network entities or the MS complies with the protocol version 1 specifications for the supplementary service procedures.