modulator-demodulator


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mod´u`la`tor-de`mod´u`la`tor


n.1.An electronic device that converts electronic signals into sound waves, and sound waves into electronic signals, used to transmit information between computers by the use of ordinary telephone lines; usually called a modem.
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The device is a future-proof modulator-demodulator solution that maximizes flexibility, efficiency, and cost savings for satellite operators.
Aviat's Symbol Repeater adds adaptive functionality to regain lost signal-to-noise ratio on a dynamic basis, thereby achieving the benefits of repeating without adding modem (modulator-demodulator) latency.
Among other things, one needed to learn how to program Hypertext Markup Language; figure out how to use File Transfer Protocol to copy a file from one computer to another over a Transmission Control Protocol/Internet Protocol-based network; use the phone book to find a local business that would "host" files; and then get a modulator-demodulator to call the phone number of this "host's" computer.