International Telecommunication Union
"Okay, but what does it mean to me?”
- The evolution of textphone communications from a
customer's perspective
Michael Day
Product Manager BT TextDirect
Plenary Session on ITU-T Standards
15th Biennial TDI International Conference –
Las Vegas, Nevada, USA
Contents
ITU-T
o Evolution of Textphones in UK
o BT TextDirect
o Why change?
o The future IP Textphone
o Gateways
14-16 July 2003
15th Biennial TDI International Conference – Las Vegas, Nevada, USA
2
Evolution of textphones in UK
ITU-T
o Not one protocol
• V.23, V.21 and Baudot
o Lack of a standard implementation
o Across the Europe Union
• EDT, variations of V.21 and V.23
• Different character sets
14-16 July 2003
15th Biennial TDI International Conference – Las Vegas, Nevada, USA
3
BT TextDirect
ITU-T
o How did we get to BT TextDirect?
• RNID Typetalk
• Regulation
o Network Prompts
o Improved relay access
o Removing the Crystal Ball
14-16 July 2003
15th Biennial TDI International Conference – Las Vegas, Nevada, USA
4
BT TextDirect - Features
ITU-T
o Call set-up information in text
o Ringing, Busy, NU tones in text
o Access to relay at any time
o Improved compatibility
o Text Caller Return
o Call anywhere
o Text Rebate
o Help desk
14-16 July 2003
15th Biennial TDI International Conference – Las Vegas, Nevada, USA
5
ITU-T
BT TextDirect - How does it
work?
o 18001 - Textphone Users
o 18002 - Voice Users
o 18000 - Textphone Emergency
o Relay Assist
o International Access
14-16 July 2003
15th Biennial TDI International Conference – Las Vegas, Nevada, USA
6
BT TextDirect - Demo
ITU-T
14-16 July 2003
15th Biennial TDI International Conference – Las Vegas, Nevada, USA
7
BT TextDirect - Lessons learnt
ITU-T
o Music on hold
o Answering machines ‘Beep’
o Voice
o Lack of standard implementation
14-16 July 2003
15th Biennial TDI International Conference – Las Vegas, Nevada, USA
8
Why Change?
ITU-T
o Communication is two way
• Duplex text and voice
1
o Mainstream products
• No more adaptation - from day one
o “A textphone on every desk”
o or “A textphone in every pocket”
1
14-16 July 2003
Duplex means simultaneous communications in both directions
15th Biennial TDI International Conference – Las Vegas, Nevada, USA
9
Solution
ITU-T
o Internet Protocols
o Universal implementation
• Dial-up, Broadband, GMS, 3G, etc.
o It can be done now
14-16 July 2003
15th Biennial TDI International Conference – Las Vegas, Nevada, USA
10
The IP Textphone
ITU-T
o Multimedia terminal
o Additional features
• Text displayed the way you want it
• Simultaneous voice
• Who’s there?
• What’s happening?
• Emotion
o Will the ‘textphone’ is exist?
14-16 July 2003
15th Biennial TDI International Conference – Las Vegas, Nevada, USA
11
The IP Textphone
ITU-T
o Demo
o Another method will produce more
communications problems - won’t
it?
o The Textphone Gateway
14-16 July 2003
15th Biennial TDI International Conference – Las Vegas, Nevada, USA
12
Textphone Gateway
ITU-T
o Talk to the Gateway you talk to the
World
• Textphones don’t need to able to
talk to each other
o Textphone + Textphone, Textphone
+ Voice, Textphone + PC, etc.
o BT TextDirect
14-16 July 2003
15th Biennial TDI International Conference – Las Vegas, Nevada, USA
13
Advantages of Gateways
ITU-T
o Supports local protocols
o Using IP over the network removes
the need for adapters
o Contains the intelligence and
knowledge to handle calls
oLegacy textphones
are not excluded
14-16 July 2003
15th Biennial TDI International Conference – Las Vegas, Nevada, USA
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More Choice
ITU-T
Textphone
3G
PDA
Mutli-media
Payphone
14-16 July 2003
Voice
Gateway
PC
GPRS
WAP
SMS
15th Biennial TDI International Conference – Las Vegas, Nevada, USA
15
Migration to IP
ITU-T
PSTN
o PSTN Textphone
14-16 July 2003
15th Biennial TDI International Conference – Las Vegas, Nevada, USA
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PSTN and IP Textphones
ITU-T
PSTN
Internet
o PSTN and IP Textphones
• Never the twain shall meet
14-16 July 2003
15th Biennial TDI International Conference – Las Vegas, Nevada, USA
17
The IP Aware Textphone
ITU-T
PSTN
Internet
o Connects to both PSTN and IP
14-16 July 2003
15th Biennial TDI International Conference – Las Vegas, Nevada, USA
18
How to find someone
ITU-T
Locator
PSTN
Internet
o Automatic call set-up
14-16 July 2003
15th Biennial TDI International Conference – Las Vegas, Nevada, USA
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The Gateway
ITU-T
Locator
PSTN
Gateway
Internet
o Access by all
14-16 July 2003
15th Biennial TDI International Conference – Las Vegas, Nevada, USA
20
What Next?
ITU-T
o Improved functionality
o Improved availability
o Needs international agreement on
IP Textphone communications
14-16 July 2003
15th Biennial TDI International Conference – Las Vegas, Nevada, USA
21
International Telecommunication Union
Thank you
Plenary Session on ITU-T Standards
15th Biennial TDI International Conference –
Las Vegas, Nevada, USA