agree You can say
TTY was derived from Teletypewriter - a device originally used by people who are deaf to communicate. But today Teletypewriters no longer exist and TTY is used to refer to a type of telecommunications device used by people who are deaf that supports Baudot (and sometimes other coding schemes) over analog phone lines. that however is probably too much history. but if you are using Teletypewriter - that would be the \correct way to use it. Gregg -------------------------------------------------------- Gregg Vanderheiden Ph.D. Director Trace R&D Center Professor Industrial & Systems Engineering and Biomedical Engineering University of Wisconsin-Madison On Aug 22, 2012, at 4:28 PM, Gunnar Hellström <[email protected]> wrote: > On 2012-08-22 22:58, Mark Rejhon wrote: >> On Wed, Aug 22, 2012 at 4:46 PM, Matthew Miller >> <[email protected]> wrote: >>> -----BEGIN PGP SIGNED MESSAGE----- >>> Hash: SHA1 >>> >>> >>> On Aug 22, 2012, at 14:42, Mark Rejhon wrote: >>> >>>> On Wed, Aug 22, 2012 at 2:30 PM, Matthew Miller >>>> <[email protected]> wrote: >>>>> * Teletypewriter (TTY) and Text Device for the Deaf (TDD) telephones >>>>> [citations recommended] >>>> Consulted with some peers. >>>> >>>> TTY expansion to Teletypewriter -- OK, good idea. >>>> TDD is actually correctly "Telecommunications Device for the Deaf", >>>> but it is deprecated usage right now by most U.S. accessibility >>>> organizations, in favour of TTY. Europeans ofte use "textphones", and >>>> variants thereof. >>>> >>>> Also, the phrase "text telephones" is more compatible and >>>> self-explanatory with the European equivalent of TTY, "textphones". >>>> >>>> It's somewhat political behind the scenes in the various communities, >>>> so changes to this bullet will need to be done very carefully. I >>>> spent many hours rewording just the Introduction as a result. >>>> >>>> Mark Rejhon >>> That's fine. I accept I operate under obsolete assumptions sometimes (-: >>> >>> But it's important that all acronyms are expanded the first time they are >>> used, and even better to include an authoritative citation. >> Oh, you might also be remembering I had >> >> ... "TTY and text telephones for the deaf". >> >> But I removed "for the deaf", when Peter/Kevin (one or both) >> complained about three mentions of the word "deaf" due to the >> overemphasis on the word, despite its clear application there. So I >> toned it down somewhat, reducing three mentions of "deaf" in >> Introduction to just one mention. > I do not think expansion of TTY to Teletypewriter is a good idea. That tends > to mean the other use of the term TTY, the device that was often used as a > computer operator console terminal a long time ago and still lives in > language around such usage. > > So TTY in this usage is more " A term used in North America for text > telephones, i.e. devices used for text and audio communication in the PSTN > mainly with deaf and hard-of-hearing persons." > > Text telephones or textphones is the international term used by ITU-T ( E.g. > V.18 and F.703 ) 3GPP ( e.g. TS 22.226 ) > IETF ( e.g. RFC 4734 ). > Various countries in Europe have different names for the concept in their > national languages, so text telephone is not specifically European. > > I hope it is clear by combining TTY with text telephone what it referred to, > so that we do not need to drag in a long descriptions of a peripheral item > into the spec. > > Gunnar
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