Emergency Information Services Interface

Event Information Table

1. A buffer that has an adjustable capacity for data.
2. A buffer that introduces an adjustable delay of signals.

The effect produced by the existence of an electric charge, such as an electron, ion, or proton, in the volume of space or medium that surrounds it.
Note: Each of a distribution of charges contributes to the whole field at a point on the basis of superposition. A charge placed in the volume of space or in the surrounding medium… (Read More →)

1. Of a transmission medium, its length expressed as a multiple or submultiple of the wavelength of a periodic electromagnetic or electrical signal propagating within the medium.
Note 1: The wavelength may be expressed in radians or in artificial units of angular measure, such as degrees.
Note 2: In both coaxial cables and optical fibers, the velocity of propagation is… (Read More →)

A telephone in which the operating power is obtained either from a battery located at the telephone, i.e., a local battery, or from a telephone central office, i.e., a common battery.

Deprecated term. See optoelectronic.

Any one of a number of phenomena that occur when an electromagnetic wave in the optical spectrum interacts with an electric field, or with matter under the influence of an electric field.
Note 1: Two of the most important electro-optic effects having application as modulation mechanisms in optical communication are the Kerr effect and the Pockels effect, in which birefringence… (Read More →)

An optical device in which a signal-controlled element is used to modulate a beam of light.
Note 1: The modulation may be imposed on the phase, frequency, amplitude, or direction of the modulated beam.
Note 2: Modulation bandwidths into the gigahertz range are possible using laser-controlled modulators.

Intelligence information other than signals intelligence derived from the optical monitoring of the electromagnetic spectrum from ultraviolet (
0. 01 m) through the far infrared (1000 m). [JP1]