- Industry: Telecommunications
- Number of terms: 29235
- Number of blossaries: 0
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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.
An exchange area in which are located two or more local central office buildings or wire centers.
Industry:Telecommunications
An exchange carrier (EC) service that is provided by suitably equipped end-office switching systems, and by means of which are provided carrier identification codes for calling users' calls outside the access service area when they are dialed without a customer accounting code (CAC. )
Industry:Telecommunications
An exchange that switches digital signals by means of digital switching.
Industry:Telecommunications
An expression of distribution of the irradiance, i.e., the optical power, across the end face of a single-mode fiber. Note: For a Gaussian power distribution in a single-mode optical fiber, the mode field diameter is that at which the electric and magnetic field strengths are reduced to 1/e of their maximum values, i.e., the diameter at which power is reduced to 1/e2 of the maximum power, because the power is proportional to the square of the field strength.
Industry:Telecommunications
An expression of the degree of electrical symmetry between two impedances connected to two conjugate sides of a hybrid set or resistance hybrid. Note 1: Hybrid balance is usually expressed in dB. Note 2: If the respective impedances of the branches of the hybrid that are connected to the conjugate sides of the hybrid are known, hybrid balance may be computed by the formula for return loss.
Industry:Telecommunications
An expression of the extent of a function, given by the difference between the two extreme values of the independent variable at which the dependent variable is equal to half of its maximum value. Note 1: FWHM is applied to such phenomena as the duration of pulse waveforms and the spectral width of sources used for optical communications. Note 2: The term full duration at half maximum (FDHM) is preferred when the independent variable is time.
Industry:Telecommunications
An expression of the extent to which an object, i.e., a target, reflects radar pulses, usually with respect to their point of origin. Note: The radar cross section of an aircraft can vary by a factor of over 100, depending on the aspect angle of the aircraft to the radar transmitter. Radar reflection off the nose of the aircraft usually represents the smallest radar cross section, while a broadside presentation to the signal produces the greatest cross section. Shape, surface roughness, and reflective material as well as orientation also affect the radar cross section.
Industry:Telecommunications
An expression of the extent to which the performance of a system, facility, or device is expected to degrade in a given nuclear environment. 2. The physical attributes of a system or component that will allow survival in an environment that includes nuclear radiation and electromagnetic impulses (EMI. ) Note 1: Nuclear hardness may be expressed in terms of either susceptibility or vulnerability. Note 2: The extent of expected performance degradation (e.g., outage time, data lost, and equipment damage) must be defined or specified. The environment (e.g., radiation levels, overpressure, peak velocities, energy absorbed, and electrical stress) must be defined or specified. 3. The physical attributes of a system or component that will allow a defined degree of survivability in a given environment created by a nuclear weapon. Note: Nuclear hardness is determined for specified or actual quantified environmental conditions and physical parameters, such as peak radiation levels, overpressure, velocities, energy absorbed, and electrical stress. It is achieved through design specifications and is verified by test and analysis techniques.
Industry:Telecommunications
An extended off-hook condition not followed by dialing. 2. A connect signal from the network that has not been followed by network outpulsing within a timed interval.
Industry:Telecommunications
An extension of a local orderwire to a point convenient for personnel to perform required operational and maintenance functions.
Industry:Telecommunications
