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in the 1970's the acoustic
coupler was a device that allows a computer to connect to other
computers. The first acoustic couplers connected to the phone
handset and transmitted
at a speeds of 300 baud as analog sound
signals that were transferred to digital by the acoustic coupler.
Below is an example picture of an acoustic coupler available through Konexx.
Today, users who wish to transmit
data over phone lines commonly use a modem
to connect to other computers or networks instead of the acoustic
coupler because of the dependability, speeds and ease of use. Although
couplers are not commonly used today, they are still used as a
solution for travelers who may not have access to a modem or network
connections and are capable of transmitting at much faster speeds
than the early couplers.
Also see: Modem definitions
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