Hi:
EDT [European Deaf Telephone] and EDTN are the TDD 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.
Also, what does ETDN stand for?
Thanks,
Radium