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 | Global Text Telephony Service Stage 1 | Global Text and Total conversation (GTT) service description | Service | Approved |
| ETSI TS 123 226 | Global Text Telephony Architecture Stage 2 |
GTT Specific description of network architecture for text conversation.
References RFC4103 normatively. |
Architecture | Approved |
| ETSI TS 126 226 | CTM Modem, General description | Robust and error tolerant modem for text telephony specified for mobile networks. | Modem transport | Approved |
| ETSI TS 126 235 | 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 | 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 | Service principles |
Brief description of mobile text conversation.
|
Service | Approved |
| ETSI TS 126 110 | Circuit Switched Multimedia Telephony ( 3G.324 ) | Includes text conversation using T.140 in AL1 channel | Multimedia call control | Approved |
| ETSI TS 124 008 | Terminal indicators | CTM indicator from terminal is defined here | Call control | Approved |
| ETSI TS 126 114 | 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 |