EDT [European Deaf Telephone] and EDTN are the TDD [Telecommunications Device for the Deaf] protocols used in Switzerland. Where can I find numbers/tones?

[Radium]

Hi:

I've posted this before but never got a rational scientific response.
Sorry for the repetition and any annoyance it causes but I am really
interested in this.

EDT [European Deaf Telephone] and EDTN are the TDD [Telecommunications
Device for the Deaf] protocols used in Switzerland. Where can I find
technical information about the EDT/EDTN? Also, I would like to hear
some tones resulting from the remote EDTs/EDTNs located in
Switzerland. I live in USA, so if I dial an EDT/EDTN number to
Switzerland, I will hear both the EDT/EDTN tones as well as the tones
resulting from negotiations among international telephone exchanges.
Those textphone and international exchange tones give me an eerie
feeling which I enjoy. I get a feeling of pleasant fear. Its give me a
psychedelic sensation. I like it. The tones are scary yet fun -- much
like virtual reality, a roller-coaster, or a trip to outer space!

If I could find accurate recording of those tones [tones from remote
Swiss EDTs/EDTNs and international exchange negotiations] on a website
in Wave format and at least 44.1 kHz sample rate and 16-bit, then I
would just download those tones and listen. Unfortunately, no internet
site has recordings of those tones.

In addition, can EDT/EDTN signals be used as a form of dial-up
internet access? Obviously it won't be any faster than other dial-ups
-- most likely a max of 56 kbps. The sounds would be different from
currently-used dial-up modems, though. This is because EDT/EDTN uses
different types of signaling than most 56K dial-up modems.

Also, what does EDTN stand for? From what I was told in
http://groups.google.com/group/rec.audio.tech/msg/fe2558b1edeb31c8?hl=en&utoken=4AIZYi4AAAAI2PeJr_MMmQkfz_j8PKAEARYt3Jalo6NNUi8Jt6wYH6Ba_Ois7NjCgNKwU1jjERM
, it stands for "European Deaf Telephone Network." This information
could very well be wrong, given that the poster seems to have a
personal vendetta against me.

I googled "European Deaf Telephone Network" in
http://www.google.com/search?hl=en&q=%22European+Deaf+Telephone+Network%22&btnG=Google+Search
but only came up with two searches containing my previous posts. This
is extremely frustrating!!!! I can't believe I am the only one who is
interested in EDT/EDTN!


Thanks,

Radium

[Rich Piehl]

<stuff snipped for brevity>

You asked essentially the same question in this group twice in 18 hours.
You've asked similar questions 4 times in 4 days.

Give it a rest.

Take care,
Rich

God bless the USA

[Radium]

On Aug 27, 6:55 pm, Rich Piehl

Post by Rich Piehl
You asked essentially the same question in this group twice in 18 hours.
You've asked similar questions 4 times in 4 days.

Well, no one answered these questions. It's very frustrating when I
have a question that is so interesting to me and I am not able to find
answers to it.

So please answer my questions.

I am interested in EDTN because its one of the types of telephone
audio devices no one talks about and it is used in Switzerland by
those with sensorineural deafness. I associate Switzerland with
frightening-yet-enjoyable high-technology magnetic telecommunications.
I don't know why, I just do. Sensorineural-deafness is accompanied by
a false-perception of a high-pitched sine-wave tone resembling the
"whine" of a CRT. Sensorineural-deafness is caused by damage to the
acoustic nerves responsible for translating mechanical vibrations in
the cochlear hairs to neural impulses that can be detected by the
brain. Since sensorineural deafness involves acoustic-nerve-damage and
the damage nerves are hyper-excitable, they
send crazy signals to the auditory cortex interpreted as sounding
similar to a CRT monitor. This is false auditory perception is called
tinnitus.

Anyways, the EDT/EDTN uses audio signals to communicate between one
EDT/EDTN device and another EDT/EDTN device. Just like one PC can
communicate with another PC half-way around the world using audio-
frequency signals via dial-up modems.

I've never actually listened to EDT/EDTN but I think I'll enjoy it.
I've listened to American TDD tones by dialing local TDD numbers

Dial 1-800-543-1586 and you'll hear the American TDD tones I am
talking about. This is an example of a TDD number used in the United
States. I want to hear the Swiss-equivalent of TDD.

Where can I find EDT/EDTN numbers? Please give me some EDT/EDTN
numbers. If that's not possible, please steer me to a website that
contains high-quality recordings of the sounds generated by EDT/EDTN
devices along with the international negotiation tones I would get
when dialing from USA to Switzerland.

High-quality = the sample-rate must be at least 44.1 KHz and the bit-
resolution must be at least 16-bit and the recording must be an
uncompressed linear-PCM wave file.

[Rich Piehl]

Post by Radium
On Aug 27, 6:55 pm, Rich Piehl

Post by Rich Piehl
You asked essentially the same question in this group twice in 18 hours.
You've asked similar questions 4 times in 4 days.

Well, no one answered these questions. It's very frustrating when I
have a question that is so interesting to me and I am not able to find
answers to it.
So please answer my questions.

If you are that interested you need to go to other sources for your
answers and to research it in depth. University libraries, telecom and
scientific publications should be your starting point.

You do know that the very definition of insanity is doing the same thing
over and over (like asking the same question in the same newsgroups) and
expecting different results?

Take care,
Rich

God bless the USA

[Paul]

This information could very well be wrong, given that the poster seems
to have a personal vendetta against me.

Don't flatter yourself. This is Usenet.

[\Blumstein]

Post by Radium
I've posted this before but never got a rational scientific response.
Sorry for the repetition and any annoyance it causes but I am really
interested in this.

Glad you reposted as I'm the new kid in town.

All of the various teletext protocols are contained in ITU standard V.
18.
You can get a free copy at:
http://www.itu.int/rec/T-REC-V.18-200011-I/en

Enjoy,
Paul