Why did the internet make that unique sound when starting up back in the 90s?
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Dialup internet used ordinary phone lines, so its communication had to be done with sounds. When you’d first set up a connection, the modem would play the sounds out loud as well as through the phone line to help you diagnose if there was any issue with the connection.
The sounds that it would play out loud were a “handshake” with your internet service provider’s modem. Basically the two modems were talking to each other to figure out how to set up the connection.
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