Harmonised relay services The work of STF 325 A project funded by ETSI and the European Union W J...

Harmonised relay services

The work of STF 325A project funded by ETSI and the European Union

W J Mellors C.Eng

STF 325 "Relay Services" 2

The Team

Wally Mellors - STF leaderGunnar HellströmJuan Calero González


This presentation

Will describe the problemSet out the aims of the workDescribe the backgroundLook at the futureMake a call for help


The Problem Many users are unable to use ordinary

telephones because of their inability to hear and/or speak

They can use some form of textphone or total communication to “talk” or sign to one another

They cannot communicate with users of ordinary telephones

Some form of conversion service is therefore required

These services are known as Relay Services Harmonisation of these services will improve

European wide communication for all


Present Aims

In 2000, TC HF produced TR 101 806 giving guidelines for relay services

Report was based on PSTN for text and ISDN for video

The aim of the present work is to convert this report to an ETSI standard

A standard will not be accepted and used unless it is realistic and achievable

This will need co-operation from all current relay service providers


Present situation

Much has changed since the year 2000 New IP based systems are available Updating will be necessary But mandatory requirements must be

currently achievable IP based systems need proving All will be explored with current service

providers


What is needed

Conversation in real time by text and voice Duplex working (two way simultaneous) Simple call set up and clear down Progress information in text form Provision of relay services Access to emergency services Provision for signing and lipreading

Just like an ordinary telephone call


The DUST concept

D - Duplex – simultaneous send and receive

U – Universal - Worldwide on all networks

S – Speech in both directions

T – Text with conversational flow


Services

Basic call Supplementary services. Hold, transfer, etc Emergency service 112 Relay service with text support

Text <> voiceHard to understand speech <> clear

speechSign language <> voice

Interoperability between DUST Host environments

Interoperability with legacy systems


Text goes mobile

Push from USA to include real time text in mobile services

3GPP established Global Text Telephony standards for text addition to all call environments with international applicability In the circuit switched voice calls In the circuit switched multimedia calls In IP multimedia calls

Mainly re-using work from ITU and IETF Now adopted as ETSI specifications


The Future

Text Conversation available to ALL Across all networks Using open and available standards All terminals interwork Full legacy support Texting anywhere anytime With voice available And with Video for signing and lipreading


This is the future

Cellular Network

Cellular Network

Fixed Network

IP network

Fixed textphone user

IP textphone or multimedia user

Fixed multimedia user

Mobile, text capable terminals


A call for help

Can you tell us of current relay service providers?

Do you wish to be a stakeholder ? Please contact me at: [email protected]

Thank you for listening

Harmonised relay services The work of STF 325 A project funded by ETSI and the European Union W J...

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