For telephone lines to carry data, a communications device called a(n) ____ like the one in the accompanying figure is used to convert digital signals to analog signals.
A) converter
B) conversion device
C) analog converter
D) modem

Question

Quizplus · Accepted Answer

The device described in the question is a modem, which stands for modulator-demodulator. It converts digital signals to analog signals for transmission over telephone lines, and then back to digital signals for use by the receiving device. None of the other answer choices accurately describe this device.

For Telephone Lines to Carry Data, a Communications Device Called