tag:blogger.com,1999:blog-5096278891763426276.post2795987045433036476..comments2024-03-13T19:12:58.863+02:00Comments on absorptions: The sound of the dialup, picturedOona Räisänenhttp://www.blogger.com/profile/08764440174916554983noreply@blogger.comBlogger106125tag:blogger.com,1999:blog-5096278891763426276.post-18403199160124182172024-03-12T17:21:24.814+02:002024-03-12T17:21:24.814+02:00exactly!exactly!Unknownhttps://www.blogger.com/profile/09785402983205524877noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-79321289745859169632023-02-21T02:20:51.681+02:002023-02-21T02:20:51.681+02:00...and so was established a great friendship. Mode......and so was established a great friendship. Modem talk is moving.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-25270862446889821872023-02-17T23:16:29.535+02:002023-02-17T23:16:29.535+02:00Thanks, I never knew people did that. I guess I re...Thanks, I never knew people did that. I guess I released it as CC-BY-SA at some point so it could technically be legal, too.Oona Räisänenhttps://www.blogger.com/profile/08764440174916554983noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-78797647692845736872023-02-17T14:46:28.655+02:002023-02-17T14:46:28.655+02:00Awesome stuff, this. On a tangent; encountered som...Awesome stuff, this. On a tangent; encountered some ripoffs on redbubble; https://www.redbubble.com/i/poster/The-Sound-of-the-Dialup-Explained-by-mattamstron/132728039.E40HW and https://www.redbubble.com/i/poster/The-Sound-of-the-Dialup-Explained-by-travisbarke/132515261.E40HWAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-15364239650480674242023-01-20T20:08:47.533+02:002023-01-20T20:08:47.533+02:00I started with 300 baud in 1982. A couple years la...I started with 300 baud in 1982. A couple years later my rich friend could afford the new 2400 baud modems. He said they went so fast it made him dizzy.<br />Now, I have to laugh at the idea of 2400 baud speed causing illness. The illness it *really* caused was being charged $6/hour. <br />I wonder what things will look like in 40 more years.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-72982087986716389702023-01-18T23:34:59.460+02:002023-01-18T23:34:59.460+02:00One reason the handshake (and, indeed, the data ex...One reason the handshake (and, indeed, the data exchange as well) was audible, was - it had to be.<br /><br />Starting in the late-1930s, telephone lines were deliberately bandpass-filtered in the human vocal audio range, to reduce noise and cross-talk on the lines.<br /><br />Signals outside the "band' of frequencies used by humans were deliberately suppressed. This reduced heterodyne on the lines.<br /><br />Later (around 1950), signaling information was encoded in alternate frequencies outside the range of human hearing, and the bandpass filters were removed on trunk and long-distance lines.<br /><br />In the 1980s, as modem use became mainstream, the filters were removed on all lines. By this time, of course, most long-distance and trunk circuits were digitized - rendering any such filtering unnecessary.<br /><br />(My grandfather was regional manager for the Northeastern US networks, for Western Electric. He taught me all about the phone systems by the time I was 10.)liverdonorhttps://www.blogger.com/profile/18319373235909982784noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-38850301807414198752023-01-18T17:48:14.994+02:002023-01-18T17:48:14.994+02:00You may wish to peek a bit further back in time......You may wish to peek a bit further back in time...Radio Teletypewriters (RATT) also used a MODEM to establish comm links back in the days when they were used as the primary long-haul communication systems for the military. The first time I heard the MODEM link-up for PC, I recognized it (even after being 10 years removed from that environment). The handshake was slower, but still unmistakable. Modern Text-speak also originated there through a system of pro-works and Z signals (U.S .Army) and Q signals (U.S. Air Force).Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-66390006373755686692023-01-18T17:08:58.925+02:002023-01-18T17:08:58.925+02:00Used a lot of dial up, back in the 1970's. So...Used a lot of dial up, back in the 1970's. Sometimes I got an operator who didn't have any idea what was going on.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-75944265324439474912023-01-18T16:39:45.707+02:002023-01-18T16:39:45.707+02:00Back in 1978 I worked with an old timer named Tex ...Back in 1978 I worked with an old timer named Tex Thomas at a startup. We were evaluating all high end modems in existence for use on telephone lines to make video conferencing a reality (no, back then you couldn’t just install Zoom on your smartphone) 🤣. Tex could whistle into the modem to make a connection. Prior to the startup, he worked at Rockwell, where they pioneered the dial-up modem, so he knew exactly what each DTMF tone did what. Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-51106220689099055242023-01-18T16:30:25.504+02:002023-01-18T16:30:25.504+02:00Thanks for the suggestion, I'll try and includ...Thanks for the suggestion, I'll try and include it for sure!Oona Räisänenhttps://www.blogger.com/profile/08764440174916554983noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-9810171955517822762023-01-18T15:59:59.559+02:002023-01-18T15:59:59.559+02:00An interesting article about telephone modems. I w...An interesting article about telephone modems. I was surprised that there was no obvious definition of the word ‘modem’ in the article. Modem is derived from combining the first parts of the words ‘modulator’ and ‘demodulator’. Maybe I missed this, but it should have been somewhere very early in the article!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-46319578626216268032023-01-18T15:53:31.390+02:002023-01-18T15:53:31.390+02:00I was waiting for the busy signal!I was waiting for the busy signal!Unknownhttps://www.blogger.com/profile/17151634106553247287noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-29796408920467757812023-01-18T12:55:30.213+02:002023-01-18T12:55:30.213+02:00Hilarious!Hilarious!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-589059803380340572023-01-16T22:51:04.003+02:002023-01-16T22:51:04.003+02:00Ah, takes me back to Compuserve—those were the day...Ah, takes me back to Compuserve—those were the days! I had my first email account in 1993 ;-)Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-17099471226356874492023-01-13T23:55:19.377+02:002023-01-13T23:55:19.377+02:00Thanks! Some kind of interactivity has been often ...Thanks! Some kind of interactivity has been often requested and I've been thinking of how to realize that, maybe in the form of a video :)Oona Räisänenhttps://www.blogger.com/profile/08764440174916554983noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-17189485348498125502023-01-13T22:57:15.987+02:002023-01-13T22:57:15.987+02:00It would be really awesome if I could click on the...It would be really awesome if I could click on the waveform image and just hear what that portion sounds like. <br /><br />But it's still awesome! Thanks a bunch!<br /><br />300 baud? FAX handshake maybe in the future?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-66634697765321843802023-01-12T11:25:42.838+02:002023-01-12T11:25:42.838+02:00Thank you for a great diagram. I reexamined it wit...Thank you for a great diagram. I reexamined it with the sound played many times.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-11955294372260805322022-11-17T06:09:20.820+02:002022-11-17T06:09:20.820+02:00It was really cool to have someone explain this. I...It was really cool to have someone explain this. I always wondered what the sounds really meant. OP thank you for taking the time to explain it the way you did and to make graphics to go with it. Really awesome. Shanenoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-38036268957743574132022-05-24T00:11:14.597+03:002022-05-24T00:11:14.597+03:00Three hours down the rabbit hole of reading about ...Three hours down the rabbit hole of reading about what 10-year-old-me considered magic. Life Is fantasticAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-15726828683048057522022-05-17T12:35:12.416+03:002022-05-17T12:35:12.416+03:00Couldn’t remember what brought me here. But it cer...Couldn’t remember what brought me here. But it certainly brings back a lot of good memories. Thank you very very muchAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-74038303828406579432022-01-31T17:02:09.874+02:002022-01-31T17:02:09.874+02:00"All you had to do to silence the handshake w..."All you had to do to silence the handshake was to send the command ATM0 down the serial line before dialing."<br /><br />i learned this 25 years too late...Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-74265321386811658752021-07-19T23:04:25.826+03:002021-07-19T23:04:25.826+03:00Thanks for sticking along :)Thanks for sticking along :)Oona Räisänenhttps://www.blogger.com/profile/08764440174916554983noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-36497963821617327392021-07-18T19:36:46.107+03:002021-07-18T19:36:46.107+03:00I've actually followed your blog since this po...I've actually followed your blog since this post, time flies!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-79871807985438589172021-06-14T23:44:12.830+03:002021-06-14T23:44:12.830+03:00Ah, sweet memories of teenage years spent in a uni...Ah, sweet memories of teenage years spent in a university library studying the V-series recommendations volume of the CCITT Blue Book (before they were renamed into ITU-T).Markushttps://www.blogger.com/profile/03781441235152966673noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-68352994921782239512021-06-11T19:27:37.336+03:002021-06-11T19:27:37.336+03:00I suggest setting the explanation as lyrics to a s...I suggest setting the explanation as lyrics to a song. The ballad of the lonely modem. 28k unrequited.Anonymousnoreply@blogger.com