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Modems

Modems are devices that modulate an analog carrier signal to encode digital information.

Contributors in Modems

Modems

V.42

Network hardware; Modems

An ITU-T standard for modem communications that defines a two-stage process of detection and negotiation for LAPM error control.

V.42 bis

Network hardware; Modems

An extension of ITU-T V.42 that defines a specific data compression scheme for use during V.42 connections.

V.44

Network hardware; Modems

An ITU-T standard for modem data compression. It provides for a 6:1 compression ratio.

28.8/33.6

Network hardware; Modems

The data transmission rates of the V.34 protocol. 28,800 or 33,600 bits per second. Note that it is accurate to refer to this speed as 28,800 bps, NOT 28,800 baud. This high rate of speed is ...

analog

Network hardware; Modems

Continuous, varying waveforms such as the voice tones carried over phone lines.

analog loopback

Network hardware; Modems

A modem self-test in which data from the keyboard or an internal test pattern is sent to the modem's transmitter, turned into analog form, looped back to the receiver, and converted back into digital ...

analog signals

Network hardware; Modems

A variety of signals and wavelengths that can be transmitted over communications lines such as the sound of a voice over the phone line.

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