My Wiki: Textphones

Textphones enable deaf people to TYPE and READ

This page scrapbooks links to text phones found searching EDT - European Deaf Telephone.

I suppose I have a Textphone Spotting hobby

The browser's ability to translate really helps me!

Minicomm
Schreibtelefon - Germany
Schreibtelefon - Swiss - Telescrit 2002 / 2108
Textlink 9100 - DSPG
TextPhone
TTY - Teletype
TTD
TDD - Telephone devices for the Deaf
teksttelefon - Norway
teksttelefoni - Sweden
Teksttelefoon - Dutch
Terminales de textos para personas con discapacidad auditiva

Some Textphones - :-

BT Textphone - supports ITU V.18 codes
TextLink-9100 DSPG
TextLink 9100 Mobile

Ultratec
Ultratec Uniphone 1000 1140 1150
Ultratec Minicom II II IV
Ultratec Supercom
Ultratec Superprint 100 200 400
Ultratec Compact
Ultratec EZ Pro

GEEMARC ScreenPhone
GEEMARC Clear Text

AT&T TDD 2700

Ameriphone Q90D TTY w/ VCO & HCO

Ultratec codes

Ultratec supply many models of textphones. You seem to need to set the code.

There are many confusing codes used , this is my best guess.

CODE	ITU modem	ITU V.18 Annex
BAUDOT	BAUDOT @ 45.45 baud	Annex A
INTERNATIONAL	BAUDOT @ 50 baud	Annex A
CCITT	ITU V.21	Annex F
ASCI	BELL103	Annex D ?
EDT	ITU V.21 @ 110 baud	Annex C

images

Here are some images of text phones.

BT Textphone:-

This only has a phone lead to plug into the PSTN, and you can plug a phone in the back for VCO.

The TextLink 9100 Mobile is a version you can plug the audio into a Mobile phone using 2.5mm / 3.5mm cable.

Ultratec Supercom

This version does not have a phone line, you have to use the Acoustic coupler.

Ultratec compact

This version does not have a phone line, you have to use the Acoustic coupler. From 1994 ROM: "cp uk 030394"

Geemarc ScreenPhone

These use V.21 7 bit ascii. They support typing using an optional PC keyboard that has the PS/2 din connector.

They dropped characters if the MSB was set.

images

America - TTY TDD MINICOM

Ultratec supply many models of textphones.

https://www.sri.com/press/story/75-years-of-innovation-acoustic-modem/

https://sfpl.org/locations/main-library/deaf-services/deaf-services-center-history-and-photographs

Ameriphone Q90D TTY w/ VCO & HCO

other countries

Dutch - Teksttelefoon

https://www.robkalmeijer.nl/techniek/telecom/telefonie/index.html - super link

Denmark - teksttelefoni

https://hoereforeningen.dk/hjaelp-til-dig/hjaelpemidler/andet-hjaelp-hverdagen/teksttelefoni

Germany - Schreibtelefon

Telescrit

https://de-academic.com/dic.nsf/dewiki/1373425

https://de-academic.com/dic.nsf/dewiki/1257020

https://artsandculture.google.com/asset/schreibtelefon-modell-deutsches-schreibtelefon-komplett-mit-zubeh%C3%B6r-in-transporttasche/8QEyD7UG5hh56w

https://de.wikipedia.org/wiki/Schreibtelefon

New Zealand

https://signdna.org/get-in-touch/

https://signdna.org/object/119-o-wds/

Norweigen - teksttelefon

https://hmi-basen.dk/blobs/produktblade/12574.pdf

https://cantec.no/horselteknisk/3821/3822 has these images:-

Norsk Teknisk Museum

https://digitaltmuseum.no/011025208598/hjelpemid-funks-hemm

https://digitaltmuseum.no/011025208598/hjelpemid-funks-hemm/media?slide=0 - norwiegn

Sweden - Texttelefoni

https://hrf.se/stockholmslan/om-oss/vard-och-stod/texttelefoni/

Swiss - Schreibtelefon

https://www.ghe.ch/admin/uploads/SpezifikationenDocs/5/Telescrit_2002,2108-d_oF.pdf -

https://www.swissinfo.ch/eng/society/positive-signs-swiss-deaf-federation-marks-75-years-of-adversity/46779982

film and tv

https://www.ofcom.org.uk/phones-and-broadband/phone-numbers/numbers-for-drama - Useful for testing. Dial one across RelayUK and your will be told by Relay UK the number has not been recognised.

https://ddbeck.com/fictitious-numbers/

Old chip for V.21

https://www.nxp.com/docs/en/data-sheet/MC145444.pdf

links

https://www.sjs-services.co.uk/textphone

https://tap.gallaudet.edu/Text/TTYBasics.html - Brief History of TTY

https://de.wikipedia.org/wiki/Schreibtelefon - useful wiki page that explains the history.

https://www.deafax.org/news/did-you-know-in-1973-the-first-uk-telephone-call-between-two-deaf-people-was-made/

The page above mentions the vistel 1 and teh science museum has this in the catalogue.

https://collection.sciencemuseumgroup.org.uk/objects/co34216/vistel-i-telephone-terminal-for-the-deaf-by-kegwain-ltd

https://sfdh.org.uk/topic/technology/

EDT is an option in the IYU V.18 spec.

I did a search for European Deaf Telephone (EDT) and came up with some interesting links.

A spanish web page:-

https://www.discapnet.es/innovacion/productos-de-apoyo/terminales-de-texto-para-personas-con-discapacidad-auditiva

A Norweigian web page:-

https://teksttelefon.no/static/informasjon-om-teksttelefonen.html

Really good Dutch webpage that has good phone diagrams and notes on DTMF used on some Textphones.

https://www.robkalmeijer.nl/techniek/telecom/telefonie/index.html

He has this diagram of a phone. You can see the Bell , hook switch, rotary dial, the Anti-sidetone hybrid Microphone and receiver with Anti- Acoustic shock diodes.