Work on accessibility in ITU-T SG 16 has its base in
Question 26,
Accessibility to Multimedia. The work is done in close co-operation
with many other groups and in many cases focuses on integrating sections
on accessibility in Recommendations. A large part of Q.26’s work aims at
including procedures for the Total Conversation concept for conversation
in Real-time Text, Video and Voice as an accessible superset of video
telephony, text telephony and voice telephony.
The following ITU-T Recommendations are a result of SG 16’s work:
- V.18 harmonization of text telephony
- V.151 Procedures for the end-to-end connection of analogue
PSTN text telephones over an IP network utilizing text relay
- T.140 the general presentation protocol for text conversation
- T.134 text conversation in the T.120 data conferencing
environment
- H.323 Annex G for text conversation in H.323 packet
multimedia environment
- H.248.2 gateway procedures between Text Telephony in PSTN and
real-time text in IP and other networks
- H Series Supplement 1 Requirements on video communication for
sign language and lip reading
- Telecommunication Accessibility Checklist for standards writers
- F.790 Telecommunications accessibility guidelines for older persons and persons with disabilities
The following are Recommendations in which sections on accessibility have been integrated:
- Sections on accessibility were included in NGN R1 Scope
Y.2000SerSup1
- Definition in F.703 of Total Conversation and Text Telephony
services, offering real-time text, video and audio communication
- Definition of the real-time conversational text medium in
F.700
- Inclusion in H.320 of real-time text conversation in ISDN
multimedia
- Section on transport of real-time text in ISDN multimedia
environments in H.224
- Sections on modem negotiation for text telephony in
V.8
- Sections in V.8 bis on modem negotiation for text telephony
- Sections in V.250 on control of V.18 modems
- Inclusion in H.324 of real time text conversation in circuit
switched multimedia
- Section in H.245 for handling real-time text connections in
H.324 and H.323 multimedia environments
- Inclusion in T.120 of real-time text in data conferencing
- Section in T.124 for handling real-time text sessions in the
T.120 environment
- Section in G.168 for testing of echo cancellation in calls
with text telephony
- Section in F.724 for accessible media additions in service
description and requirements for video telephony services over
IP networks
- Section in F.733 for accessible media additions in multimedia
conference services over IP
- Section in F.742 for accessible media additions in service
description and requirements for distance learning services
- Section in F.741 for accessible media additions in service
description and requirements for audiovisual on demand services
- Inclusion in V.152 of text telephony considerations in voice
band data gateway procedures
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