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We all used this kind of advanced technology to connect to the internet back in the 90s.

• sandworm101 3y ago
  Not really. The phone lines were not compressed then.
  • bux93 3y ago
    They were, they got compressed with G.711 or G.722. In fact, that's why your 56kbps modem would often fall back to 38.4kbps or 28k8, until the phone company installed a fancy new exchange that demodulated the 56kbps stream and didn't compress it. The 56kbps was also due to sampling limits/bandlimiters, on the same copper line you could also get a fully digital ISDN line that did 64kbps. (And if they remove all the filters and band limits, you can reach DSL speeds.) There's nothing inherently special about voice-compression compared to any other kind of interference/distortion you can get on an analogue line. Also, faxes still work?