A frame for which one or more of the following conditions apply: the frame is not properly bounded by flags; the frame does not consist of an integral number of octets prior to zero-bit insertion or following zero-bit extraction; the frame contains a frame-check sequence error (note that this condition is not recorded in the protocol abnormality log); the frame… (Read More →)

The term “inventory“ refers to all telephone numbers distributed, assigned or allocated: to a service provider, or to a pooling administrator for the purpose of establishing or maintaining a thousands-block number pool (CFR §
5
2. 7 (j))

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.