2 ms·

Nice work! Maybe I missed this, but have you considered simulating a dial tone?

• stavros 4y ago
  I haven't, I think it would be a fair bit of work, given that the modem is what outputs the sound.
  • alamortsubite 4y ago
    I haven't worked with the Arduino. Would it be difficult to incorporate an SPDT relay to switch the sound source between it and the modem?
    • stavros 4y ago
      Hmm, probably not, actually, that's a good idea. It was one of my first projects, so I didn't really know what I was doing, which limited how much I could do.
      • alamortsubite 4y ago
        It's a great project! Thanks for sharing it. If the relay works you could also simulate the pulse dialing signals with clicking audio on the dial return.