Early telephone systems restricted voice signals to (3 mathrm{kHz}) and added a (1 mathrm{kHz}) guard band to

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Early telephone systems restricted voice signals to \(3 \mathrm{kHz}\) and added a \(1 \mathrm{kHz}\) guard band to keep signals separated. Those systems (and most land lines even today) use twisted-pair wires with a bandwidth of \(1 \mathrm{MHz}\). How many voice signals could be accommodated?

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The Analysis And Design Of Linear Circuits

ISBN: 9781119913023

10th Edition

Authors: Roland E. Thomas, Albert J. Rosa, Gregory J. Toussaint

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