1. The original band of frequencies produced by a transducer, such as a microphone, telegraph key, or other signal-initiating device, prior to initial modulation.
Note 1: In transmission systems, the baseband signal is usually used to modulate a carrier.
Note 2: Demodulation re-creates the baseband signal.
Note 3: Baseband describes the signal state prior to modulation, prior to multiplexing, following… (Read More →)

A local area network in which information is encoded, multiplexed, and transmitted without modulation of carriers.

Intensity modulation of an optical source, e.g., LED or ILD, directly, without first modulating the signal of interest onto an electrical carrier wave. [After FAA]

Transmission of a digital or analog signal at its original frequencies; i.e., a signal in its original form, not changed by modulation.

Abbreviation for base communications.

A characterization of a simple standardized combination of access channels that constitute the access arrangements for the majority of ISDN users; specifically, any of the following combinations of access channels: (1) one D-channel, (2) one B-channel plus one D-channel, (3) two B-channels plus one D-channel. [After T1.601-1988]

A call between two users that does not include additional features (e.g., a plain telephone call).

The sequence of activities used in processing a basic call attempt. [T1.667-1999]

A component that is identifiable at the lowest hierarchical level of specification produced during Detailed Design [ITSEC].