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Electronics Forum / Basics / August 2007EDT [European Deaf Telephone] and EDTN are the TDD [Telecommunications Device for the Deaf] protocols used in Switzerland. Where can I find tones/numbers?
Hi: I've posted this before but never got a rational scientific response. I apologize profusely 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 in advance for your assistance, cooperation, and understanding, Radium >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! --- Could be that everyone is losing interest in your trolls, troll. --- >Thanks in advance for your assistance, cooperation, and understanding, --- Piss off.  SignatureJF > Could be that everyone is losing interest in your trolls, troll. I don't troll. I am just 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 hair 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. 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. >> Could be that everyone is losing interest in your trolls, troll. > >I don't troll. --- Sure you do. Your trick is to generate confusion and then you get your jollies watching some folks floundering around trying to make sense of your nonsense. --- >I am just interested in EDTN because its one of the >types of telephone audio devices no one talks about and it is used in [quoted text clipped - 22 lines] >talking about. This is an example of a TDD number used in the United >States. I want to hear the Swiss-equivalent of TDD. --- Blah, blah, blah, blah f.cking blah. Piss off, troll. SignatureJF > Hi: > [quoted text clipped - 5 lines] > Device for the Deaf] protocols used in Switzerland. Where can I find > technical information about the EDT/EDTN? As you could find in one minute from searching Google, EDT is one of the protocols defined in V.18. It is used in several European countries, not just in Switzerland. V.18 bundles a variety of ways for deaf people to communicate. Its a rather messy spec. Regards, Steve > As you could find in one minute from searching Google, EDT is one of the > protocols defined in V.18. It is used in several European countries, not > just in Switzerland. V.18 bundles a variety of ways for deaf people to > communicate. Its a rather messy spec. Okay, thanks for your assistance regarding EDT. What about EDTN? What is EDTN? Does EDTN use V.18? > I've posted this before but never got a rational scientific response. > I apologize profusely for the repetition and any annoyance it causes [quoted text clipped - 4 lines] > technical information about the EDT/EDTN? Also, I would like to hear > some tones resulting from the remote EDTs/EDTNs located in Just learn how to build an oscillator, make a few of them tuned to your favorite frequencies, and play watever you want to. Good Luck! Rich > Just learn how to build an oscillator, make a few of them tuned > to your favorite frequencies, and play watever you want to. Ahhh, a drone. The first issue of Popular Electronics I ever bought, which was the second hobby electronic magazine I bought, had Don Lancaster's "Psych-Tone" on the cover. A pseudo-random sequence generator, feeding a vco, and various circuitry to filter and put an envelope on the VCO's output. More fun than a barrel of monkeys. Michael >> Just learn how to build an oscillator, make a few of them tuned >> to your favorite frequencies, and play watever you want to. [quoted text clipped - 8 lines] > > More fun than a barrel of monkeys. I once played a 16- or 24-bit PSRG through a speaker, and I could hear the repeat rate. That was just the bit stream - I tried picking off 8 bits to go to a DAC, but it sounded almost the same. )-; Cheers! Rich > Just learn how to build an oscillator, make a few of them tuned > to your favorite frequencies, and play watever you want to. I first have to know what my favorite frequencies are? |
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