3 Definitions and abbreviations

24.6293GPPExplicit Communication Transfer (ECT) using IP Multimedia (IM) Core Network (CN) subsystemProtocol specificationRelease 18TS

3.1 Definitions

For the purposes of the present document, the following terms and definitions apply:

ECT session identifier URI: PSI created and inserted by an ECT AS that resolves to the AS itself

NOTE 1: If this URI contains correlation information it has to be constructed in such a way that it does not reveal identity information about any party involved in the transfer.

transferee: party being transferred to the transfer target

transferor: party initiating the transfer

transfer target: party that the existing communication is transferred to

NOTE 2: After transfer the transferee and the transfer target are in communication with each other.

3.2 Abbreviations

For the purposes of the present document, the following abbreviations apply:

ACR Anonymous Communication Rejection

AS SIP Application Server

CDIV Communication DIVersion

CONF CONFerence

CSCF Call Session Control Function

ECT Explicit Communication Transfer

GRUU Globally Routable User agent URI

HOLD communication HOLD

IETF Internet Engineering Task Force

IFC Initial Filter Criteria

ISDN Integrated Services Digital Network

MCID Malicious Call IDentification

MGCF Media Gateway Control Function

MiD Multi-iDentity

MuD Multi-Device

OCB Outgoing Communication Barring

ODB Operator Determined Barring

OIP Originating Identification Presentation

OIR Originating Identification presentation Restriction

PSAP Public Safety Answering Point

PSTN Public Switch Telephone Network

S-CSCF Serving-CSCF

SIP Session Initiation Protocol

TIP Terminating Identification Presentation

TIR Terminating Identification presentation Restriction

UE User Equipment