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TS 22.091 (SA1)
Explicit Call Transfer (ECT) supplementary service – Stage 1

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V14.0.0 (PDF)  2017/03  17 p.
V13.0.0  2015/12  17 p.
V12.0.0  2014/10  17 p.
V11.0.0  2012/09  17 p.
V10.0.0  2011/04  17 p.
V9.0.0  2009/12  17 p.
V8.0.0  2009/01  17 p.
V7.0.0  2007/06  17 p.
V6.0.0  2004/12  17 p.
V5.0.0  2002/07  17 p.
V4.0.0  2001/04  17 p.
V3.1.0  2000/10  17 p.

Rapporteur:  Dr. Swetina, Joerg
Antecedent:  TS 02.91
See also:  ECT-related TS/TR

This TS specifies the stage 1 description of Explicit Call Transfer (ECT) from the service subscriber's and user's points of view, in particular:
  • the procedures for normal operation with successful outcome;
  • the action to be taken in exceptional circumstances;
  • the interaction with other supplementary services.
This TS does not deal with the Man-Machine Interface (MMI) requirements, but makes reference to the appropriate Technical Specifications. The charging principles applied to ECT are established in this TS in terms of the charging information required to be collected. Any subsequent charging implications are outside of the scope of this TS. Any interactions with other networks not dealt with in Clause 9 are outside the scope of this TS.


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1 Scope2 References3 Definitions and abbreviations3.1 Definitions3.2 Abbreviations4 Description4.1 Applicability to telecommunication services5 Normal operation with successful outcome5.1 Provision5.2 Withdrawal5.3 Registration5.4 Erasure5.5 Activation5.6 Deactivation5.7 Invocation5.8 Normal operation5.9 Interrogation5.10 Charging requirements6 Exception procedures or unsuccessful outcome7 Alternate procedures8 Interaction with other supplementary services8.1 Calling Line Identification Presentation (CLIP)8.2 Calling Line Identification Restriction (CLIR)8.3 Connected Line Identification Presentation (COLP)8.4 Connected Line Identification Restriction (COLR)8.5 Call Forwarding Unconditional (CFU)8.6 Call Forwarding on mobile subscriber Busy (CFB)8.7 Call Forwarding on No Reply (CFNRy)8.8 Call Forwarding on mobile subscriber Not Reachable (CFNRc)8.9 Call Waiting (CW)8.10 Call Hold (HOLD)8.11 Multi-party (MPTY) service8.12 Closed User Group (CUG)8.13 Advice of Charge (AoC)8.14 Barring of All Outgoing Calls (BAOC)8.15 Barring of all Outgoing International Calls (BOIC)8.16 Barring of all Outgoing International Calls except those direct to the Home PLMN Country (BOICexHC)8.17 Barring of All Incoming Calls (BAIC)8.18 Barring of Incoming Calls when roaming outside the home PLMN country (BIC-Roam)8.19 Call Transfer (CT)9 Interworking considerationsA Deviations of PLMN ECT to the ISDN specifications of ECTA.1 Subclause 4.1 Applicability to telecommunication servicesA.2 Subclause 5.8 Normal operationA.3 Subclause 6 Exception procedures or unsuccessful outcomeA.4 Subclause 8.6 and 8.7A.5 AnnexesB [N] Cross Phase compatibilityC Change history


1  ScopePDF-p. 6
2  References
3  Definitions and abbreviations
4  Description
5  Normal operation with successful outcome
6  Exception procedures or unsuccessful outcome
7  Alternate procedures
8  Interaction with other supplementary servicesUp
9  Interworking considerationsUp
A  Deviations of PLMN ECT to the ISDN specifications of ECTPDF-p. 13
B (Normative)  Cross Phase compatibilityPDF-p. 14
C  Change historyPDF-p. 15

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