baud

communications

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June 29, 2026

Quick Summary

Baud is a unit used to measure data transmission speed, representing the number of signal changes or symbols transmitted per second. It is named after French inventor Jean-Maurice-Émile Baudot.1

In the context of modems, which convert digital signals to analog for transmission and vice versa, baud rate is a component of data transmission speed. Early modems used a baud rate where one baud equaled one bit per second. However, modern modems can transmit multiple bits per baud, making the more accurate measure of transmission rate bits or kilobits per second.2

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baud
modem

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Operating parameters
…phases) is known as a baud. In early voiceband modems beginning in the early 1960s, one baud represented one bit, so that a modem operating, for instance, at 300 bauds per second (or, more simply, 300 baud) transmitted data at 300 bits per second. In modern modems a baud can…
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…phases) is known as a baud. In early voiceband modems beginning in the early 1960s, one baud represented one bit, so that a modem operating, for instance, at 300 bauds per second (or, more simply, 300 baud) transmitted data at 300 bits per second. In modern modems a baud can…
Read More