In the encoder and the feedback path of the decoder, the process that maps the core bits into a quantized difference signal. In the feed-forward path of the decoder, the process that maps the core bits and the received enhancement bits into a quantized difference signal. [T1.310-1991]

A functional unit capable of accessing and combining two or more low-speed circuits into a virtual broadband circuit, up to and including an aggregate equal to a T1 rate.

The physical law stating that irradiance, i.e., the power per unit area in the direction of propagation, of a spherical wavefront varies inversely as the square of the distance from the source, assuming there are no losses caused by absorption or scattering.
Note: For example, the power radiated from a point source, e.g., an omnidirectional isotropic antenna, or from any… (Read More →)

In frequency-division multiplexing, a position of a translated channel in which an increasing signal frequency in the untranslated channel causes a decreasing signal frequency in the translated channel.

1. In electrical engineering, a device for converting direct current into alternating current. [JP 1-02]
2. In computers, a device or circuit that inverts the polarity of a signal or pulse. Deprecated synonym negation circuit.

See eight-hundred (800) service.

Acronym for Inward Wide-Area Telephone Service. See eight-hundred (800) service.

Abbreviation for input-output controller, integrated optical circuit.

Abbreviation for Internal Organization of the Network Layer. The OSI standard for the detailed architecture of the Network Layer.
Note: Basically, it partitions the Network layer into subnetworks interconnected by convergence protocols (equivalent to internetworking protocols), creating what is called a catenet or internet.

That part of the atmosphere, extending from about 70 to 500 kilometers, in which ions and free electrons exist in sufficient quantities to reflect and/or refract electromagnetic waves. [After JP1]