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Total Conversation Communication for all with SIP based Multimedia calls. Gunnar Hellström,. ITEXPO, Miami Jan 2010. Total Conversation puts the user in the center of the communication society. The way you call every day must also be the way you call in emergency. - PowerPoint PPT Presentation
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InternationalTelecommunicationUnion
ITEXPO Miami, 21 January 2010
Total ConversationCommunication for all with SIP based Multimedia calls
Gunnar Hellström,
ITEXPO,Miami
Jan 2010
InternationalTelecommunicationUnion
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 everyday 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 communicationdirect or via relay services
InternationalTelecommunicationUnion
ITEXPO Miami, 21 January 2010 3
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 showingReal-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.703The base for conversational services for all.Appreciated in implementations with thousands of
users.General concept, but SIP is the main
implementation environmentA 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.
InternationalTelecommunicationUnion
ITEXPO Miami, 21 January 2010 4
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
InternationalTelecommunicationUnion
ITEXPO Miami, 21 January 2010 5
Old PSTN network
Traditional Textphones
PSTN Phones
VoIP Phones(voice only)
SIP with RFC4103
for Real-time Textvideo
and audio
PSTNTo IP
GatewayGATEWAY
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
OtherProtocols
Total Conversation Interoperability
GATEWAYPSTN
112
Focus on SIP, allow variations through gateways
InternationalTelecommunicationUnion
ITEXPO Miami, 21 January 2010 6
REACH112 EU Project Network with interoperable Total Conversation services
Internet
Sweden TC
Netherlands TC(Trials)
Spain TC(Trials)
France TCUK TC
TC SIPTC S
IP
TC SIP
TC
SIP
TC SIP
Type Talk(V.21)
RTT Service
Text Relay(V.21)
Video Relay
SIP
PSAP
PSAP
PSAP
Video Relay
PSAP
SIP
Video Relay
PSAP
Key
Gateway
PSTN Text Terminal
Mobile TC User
Mobile Text User
Static TC User
TC Call Center Agent
RTT Service
Multiple providersMultiple manufacturersInteroperability by using same interchange protocolSIP with T.140/RFC 4103 real-time text,video and audio.SIP peeringNo isolated islands
InternationalTelecommunicationUnion
ITEXPO Miami, 21 January 2010 7
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
InternationalTelecommunicationUnion
Gunnar Hellströ[email protected]
www.omnitor.se
ITU-T Workshop on AccessibilityGeneva, 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.
