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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Blast from the past: dial-up modem sounds

Posted by jpluimers on 2019/12/02

Because fewer and fewer people have used them in real life: this is how geeks communicated even before the internet era.

Below a series of videos with modem sounds. One as recent?! as 2008 when dial-up was still possible in many places. Now it’s a not just a thing from the past, but an area where mankind learned a lot about signal processing, for which the knowledge is still in use today.

  1. The Sound of dial-up Internet with dial tones and initial training sequences
  2. ALL Old Modem Sounds (300 baud to 56K) demonstrating how a Conexant V.92 based soft-modem could create most modem standard used in North America (Bell 103, V.22(bis), V.32(bis), V.34, V.90, and V.92), corresponding to 300 bps, 2400 bps, 14.4K, 33.6K, and 56K.
  3. Dial Up Modem Handshake Sound – Spectrogram which is a pre-amble to absorptions: The sound of the dialup, pictured.
  4. Sound of the dialup modem explained



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