1. International Telecommunication Union ITEXPO Miami, 21 January 2010 Total Conversation Communication for all with SIP based Multimedia calls Gunnar Hellström, ITEXPO, Miami Jan 2010

2. International Telecommunication Union ITEXPO Miami, 21 January 2010 2 Total Conversation puts the user in the center of the communication society. Text, Sign & Caption Relay Services user with communication disability Emergency services 112, 911,... Users with Total Conversation or Real-time text Devices Voice telephone users The user in the center of inclusive communication The way you call every day must also be the way you call in emergency Relay services for mode conversion when users have no common way of communication When all have interoperable Total Conversation. many calls can go direct Same terminal for all contacts Voice user communication direct or via relay services

3. International Telecommunication Union ITEXPO Miami, 21 January 20103 Total Conversation, communication in many ways Enables consistent voice, text and video communication at the same time and in real time. Media: Audio for speech. Video for sign language, lip reading, and general showing Real-time text for good text contact for part or whole conversation An open standardised concept, originally from ITU, now also in IETF, ETSI and 3GPP standards. Defined in ITU-T F.703 The base for conversational services for all. Appreciated in implementations with thousands of users. General concept, but SIP is the main implementation environment A small but important extension of the videophone concept by adding real-time text. Now supported to grow through the EU deployment project REACH112. Real-time text: Text is sent at the same flow as it is typed. Near character-by-character. Gives good contact and efficient dialogue in intensive calls.

4. International Telecommunication Union ITEXPO Miami, 21 January 20104 Call with media: Real-time text, video, voice. -desirable for all -essential for people with disabilities -desirable for everyday calls -essential for emergency calls Example: A deaf-blind woman in a Total Conversation call, producing sign-language and receiving text. (click to play) Total Conversation example

5. International Telecommunication Union ITEXPO Miami, 21 January 20105 Old PSTN network Traditional Textphones PSTN Phones VoIP Phones (voice only) SIP with RFC4103 for Real-time Text video and audio PSTN To IP Gateway GATEWAY Text, video and Voice VoIP Phone Computer, PDA, other Text device with Textphone capability (directly or indirectly) Mobile phone IP text device Other Networks ( closed systems, other standards) IP network Personal Computers (text, voice and video) VoIP Mobile phone with RTT Other Protocols Total Conversation Interoperability GATEWAY PSTN 112 Focus on SIP, allow variations through gateways

6. International Telecommunication Union ITEXPO Miami, 21 January 20106 REACH112 EU Project Network with interoperable Total Conversation services Multiple providers Multiple manufacturers Interoperability by using same interchange protocol SIP with T.140/RFC 4103 real-time text, video and audio. SIP peering No isolated islands

7. International Telecommunication Union ITEXPO Miami, 21 January 20107 SIP at the heart of Total Conversation Media negotiation for all three media carried in SDP. RTP based media may go directly between terminals. Video, Real-time text and Audio. Connection possible with subsets of media Firewall and router passing through mature technologies. – SIP-aware routers – Remote SIP Connectivity

8. International Telecommunication Union Gunnar Hellström gunnar.hellstrom@omnitor.se www.omnitor.se ITU-T Workshop on Accessibility Geneva, 2 November 2009 8 Acknowledgement: Some pictures and video clips were provided from the Telecommunication Access Rehabilitation Engineering Research Center of the University of Wisconsin, funded by NIDRR.