1 © 2004 Cisco Systems, Inc. All rights reserved. Total Conversation through ITU-T & IETF Standards: Sign, Type, and Speak – You Decide Paul E. Jones Cisco.

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Presentation transcript:

1 © 2004 Cisco Systems, Inc. All rights reserved. Total Conversation through ITU-T & IETF Standards: Sign, Type, and Speak – You Decide Paul E. Jones Cisco Systems, Inc. May 7, 2004

222 © 2004 Cisco Systems, Inc. All rights reserved. It’s All About “Total Conversation” The ITU-T and IETF are working on standards that bring about the convergence of Voice telephony Video telephony Text telephony These standards aim to enable what it calls “Total Conversation”

333 © 2004 Cisco Systems, Inc. All rights reserved. Defining the Multimedia Service The ITU-T defined a series of service specifications and included text and video as components of the multimedia services (F.700 and F.703) Several multimedia protocols evolved, including: H.323 – Multimedia communication over packet-switched networks (ITU-T) SIP – Session Initiation Protocol (IETF) H Multimedia communication over ISDN (ITU-T) H.324 – Multimedia communication over low bit-rate links (phone lines and mobile phones) (ITU-T, 3GPP) Multimedia systems largely focused only on voice and video

444 © 2004 Cisco Systems, Inc. All rights reserved. Standards focused on Disabilities H Series Supplement 1 – Raised awareness about sign language and lip reading as it relates to video quality Standards to allow text conversation: ITU-T T.140 defines a representation of text suitable for transmission over IP networks and able to support all languages in the world IETF RFC 2793 defines how to transport T.140 over IP H.323 and SIP can utilize RFC 2793 to transmit text

555 © 2004 Cisco Systems, Inc. All rights reserved. ToIP Objectives (“Text over IP”) Focused on bridging two PSTN networks via IP Allow for character-by-character text communication Allow for simultaneous two-way conversation, along with voice and video (inherent limitations of the PSTN an obstacle) Standardize on an international character set (Unicode) Support all standard TTY device types defined in ITU-T V.18 Enable different device types to communicate through each other by using the gateways as “interworking” devices (see next slide) Enable legacy, PSTN devices to communicate with newer, IP- based systems ToIP Site:

666 © 2004 Cisco Systems, Inc. All rights reserved. RFC-2793 Enables Global TTY Communications U.S. Baudot TTY Device United Kingdom V.21 TTY Device IP Network Today, TTY devices are islands and cannot communicate with other text devices or other TTY protocol around the world A new standard enables global TTY communications (e.g. V.21 to Baudot) RFC-2793 enables transport of real-time text over VoIP V.151 defines how to use RFC 2793 between PSTN gateways, allowing interconnection of dissimilar TTY types (expected ratification late 2004 / early 2005) RFC-2793 enables text communication revolution Integration with IP End Points (e.g. IP Phones, Voic , Softphone, etc.) Integration with Instant Messaging (70M users) Integration with wireless Short Messaging Systems (75M US users – IDC 2003, 1.3B world-wide users – Radicati) PSTN Gateway PSTN Gateway PSTN – V.21 PSTN -Baudot IP End Point Phones / Voic / IVR PC IP Softphone RFC-2793 PC Instant Msg Gateway SMS / IM to RFC2793 Cellphone w/ SMS )))))) ((((((

777 © 2004 Cisco Systems, Inc. All rights reserved. Ultimate Goal – Total Conversation To allow any device to support the transmission of video and/or text signals To allow a user on a PC connected to an IP network to chat with a user on a legacy PSTN TTY device To improve communications with the widespread adoption of video To allow a user with a wireless PDA to communicate with anybody in the world To not require special tools for communications

888 © 2004 Cisco Systems, Inc. All rights reserved. Conclusion Enable Video, Text, and Voice Communications. So you can Sign, Type, or Speak. You Decide.