RTT in ETSI and 3GPP standards

ETSI and 3GPP Accessibility specific documents

Standard Full name Explanation Type Status
ETSI ETR 333 Text Telephony, User Requirements And Recommendations Describes user needs for text conversation and guidelines for standardisation Requirement Approved.
ETSI TR 101 806 Guidelines for Telecommunication Relay Services for text and video Guidelines for Telecommunication Relay Services for text and video Requirement Approved
ETSI TS 122 226

3GPP TS 22.226

Global Text Telephony Service Stage 1 Global Text and Total conversation (GTT) service description Service Approved
ETSI TS 123 226

3GPP TS 23.226

Global Text Telephony Architecture Stage 2 GTT Specific description of network architecture for text conversation.

References RFC4103 normatively.

Architecture Approved
ETSI TS 126 226  

3GPP TS 26.226

CTM Modem, General description Robust and error tolerant modem for text telephony specified for mobile networks. Modem transport Approved
ETSI TS 126 235

3GPP TS 26.235

Packet Switched Conversational Multimedia , default codecs Includes text conversation using T.140 in RTP as RFC 4103.

References RFC4103 normatively.

Profile Approved
ETSI TS 126 236

3GPP TS 26.236

Packet switched conversational multimedia, transport. Includes text conversation transport RFC 4103.

References RFC4103 normatively.

Profile Approved
ETSI EG 202 320 Duplex Universal Speech and Text Communication Guide for text as a mainstream call component.

References RFC4103 Normatively.

Requirements and implementation framework Approved
ETSI TS 102 511 AT Commands for Assistive Mobile Device Interfaces External interface for assistive devices External interface specification Draft
ETSI ES 202 975 Harmonised Relay Services The document will set minimum standards for the provision of relay services for text telephony in Europe. Includes text conversation transport.

References RFC 4103.

Service definition Approved

ETSI and 3GPP general documents of accessibility interest

Standard Full name Explanation Type Status
ETSI TS 122 101

3GPP TS 22.101

Service principles

Brief description of mobile text conversation.

 

Service Approved
ETSI TS 126 110  

3GPP TS 26.110

Circuit Switched Multimedia Telephony ( 3G.324 ) Includes text conversation using T.140 in AL1 channel Multimedia call control Approved
ETSI TS 124 008

3GPP TS 24.008

Terminal indicators CTM indicator from terminal is defined here Call control Approved
ETSI TS 126 114

3GPP TS 26.114

IMS Multimedia Telephony codec considerations Real-time text, video and audio are included.

References RFC4103 normatively.

Profile and codec details Approved for 3GPP release 7