Why did the dial up modem noise sound the same every time? What was the purpose of those sounds as the connection was being made?

Question

I understand that modems used the telephone line to transmit and decode sound into data, but I don’t understand why that noise everyone remembers needed to happen. You didn’t hear sound when you were loading a web page even though sound was being decoded by you modem… what was the purpose for it on start-up?

Edit: Autocorrect typo

In: Technology

Answer 1

That sound was the same as what was transmitted on the phone line during dialup. It’s the two modems exchanging data about each other and the connection and if you knew what to listen for you could detect if something was wrong just by what part of the sound was not as it should be.