3 Definitions and abbreviations

23.2263GPPGlobal Text Telephony (GTT)Release 17Stage 2TS

3.1 Definitions

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

Total Conversation: A service offering standardised simultaneous text, video and voice conversation or a subset thereof (see ITU‑T Recommendation F.703 [13]).

Host environment: The session environment where the text component is added. e.g. Circuit switched voice, IP Multimedia, etc.

Text Conversation: A real time conversation in text with transmission character by character as entered.

3.2 Abbreviations

For the purposes of this document the following abbreviations apply in addition to those defined in TS 22.226 [3]:

GTT Global Text Telephony

CTM Cellular Text telephone Modem, as specified in TS 26.226 [12]

BCSM Basic Call State Model

CAMEL Customised Application for Mobile Enhanced Logic

CAP CAMEL Application Protocol

CLIP Calling Line Presentation

CPC Calling Party Category

GMSC Gateway MSC

HPLMN Home PLMN

ISUP ISDN User Part

MSC Mobile Switching Centre

MSRN Mobile Station Roaming Number

NDC National Destination Code

PLMN Public Land Mobile Network

SK Service Key

TRAU Transcoder and Rate Adaption Unit

UMTS Universal Mobile Telecommunication System

VLR Visited Location Register