23.0913GPPExplicit Call Transfer (ECT) supplementary serviceRelease 17Stage 2TS
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.
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– 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.
 3GPP TR 21.905: "3G Vocabulary".
 3GPP TS 23.083: "Call Waiting (CW) and Call Hold (HOLD) supplementary services – Stage 2".
 3GPP TS 24.008: "Mobile Radio Interface Layer 3 specification; Core Network Protocols – Stage 3".
 EN 300 368: "Integrated Services Digital network (ISDN); Explicit Call Transfer (ECT) supplementary service; Functional capabilities and information flows".
 EN 300 356-14: "Integrated Services Digital network (ISDN); Signalling System No. 7; ISDN User Part (ISUP) version 3 for the international interface; Part 14: Explicit Call Transfer (ECT) supplementary service ".
 3GPP TS 23.011: "Technical realization of Supplementary Services".
 3GPP TS 23.018: "Basic Call Handling".