AT&T made a modem 60 years ago that the market absolutely refused to stop buying to this day. It's incredibly simple, and there's a good chance you've actually heard it's data format before. If you liked this video, please subscribe! Don't forget notifications! Support me: https://patreon.com/cathoderaydude https://ko-fi.com/cathoderaydude If you have a Bell 103-capable modem, call this number for a special message: 509.569.7985 Set your serial port to TWO stop bits, not the usual one! Please read my comment(s) below for some corrections (they don't fit in the description!)