3 ms·

I stand corrected then!

• TuringTest 5y ago
  Pedantic tidbit of archaic lore: this was so because each digit was represented by the number of clicks that the rotating disc triggered on the line (with 10 clicks for 0).
  • addingnumbers 5y ago
    If the dial was locked or missing, you could still "dial" a number by quickly tapping it with the on-hook switch the receiver would rest on, because that was the same effect the rotary dial mechanism was producing