- 産業: Telecommunications
- Number of terms: 29235
- Number of blossaries: 0
- Company Profile:
ATIS is the leading technical planning and standards development organization committed to the rapid development of global, market-driven standards for the information, entertainment and communications industry.
A virtual path link (VPL) or a virtual channel link (VCL. )
Industry:Telecommunications
A visual representation of a character, other than a control character. 2. In the ASCII code, a character other than an alphanumeric character, intended to be written, printed, or otherwise displayed in a form that can be read by humans. Note 1: Graphic characters are contained in rows 2 through 7 of the ASCII code table. Note 2: The yyspace and delete characters are considered to be graphic characters.
Industry:Telecommunications
A voice or data circuit used by technical control and maintenance personnel for coordination and control actions relative to activation, deactivation, change, rerouting, reporting, and maintenance of communication systems and services. Synonyms engineering channel, engineering orderwire, service channel.
Industry:Telecommunications
A voice or data communications circuit that (a) serves as a transmission link between adjacent communications facilities that are interconnected by a transmission link and (b) is used only for coordination and control of link activities, such as traffic monitoring and traffic control.
Industry:Telecommunications
A voice-frequency transformer characterized by a closed core, a pair of identical balanced primary (line) windings, a pair of identical but not necessarily balanced secondary (drop) windings, and low transmission loss at voice frequencies. Note: It permits transfer of voice currents from one winding to another by magnetic induction, matches line and drop impedances, and prevents direct conduction between the line and the drop.
Industry:Telecommunications
A voltage induced or appearing along the length of a transmission medium. Note 1: Longitudinal voltage may be effectively eliminated by using differential amplifiers or receivers that respond only to voltage differences, e.g., those between the wires that constitute a pair. Note 2: Induced longitudinal voltages at low (power-line) frequencies can be greatly reduced by twisting parallel wires to create what are referred to as "twisted wire pairs. " Synonym common-mode voltage.
Industry:Telecommunications
A volume defined by conductor-dielectric or dielectric-dielectric reflective boundaries, or a combination of both, and having dimensions designed to produce specific interference effects (constructive or destructive) when excited by an electromagnetic wave.
Industry:Telecommunications
A voluntary, industry-developed document that establishes requirements for products, practices, or operations.
Industry:Telecommunications
A wave having (a) energy concentrated near a boundary, or between substantially parallel boundaries, separating materials of different properties and (b) a direction of propagation effectively parallel to these boundaries.
Industry:Telecommunications
A wave of constant amplitude and constant frequency.
Industry:Telecommunications
