1. Tests to determine whether an implemented system fulfills its requirements.
2. The checking of data for correctness or for compliance with applicable standards, rules, and conventions.
3. [The] process of applying specialized security test and evaluation procedures, tools, and equipment needed to establish acceptance for joint usage of an information system (IS) by one or more departments or agencies… (Read More →)

The system containing the data base information to be used in validation of the telecommunications charge card or billed number screening data.

The date the transfer entry to an account is considered effective; either the day the instruction is received or some future date as stipulated by the originator. [After X9.9]

A company that sells the services of a value-added network.

A network using the communication services of other commercial carriers, using hardware and software that permit enhanced telecommunication services to be offered.

Acronym for value-added network.

Volt-ampere reactive.

A buffer into which data may be entered at one rate and removed at another rate without changing the data sequence.
Note: Most first-in first-out (FIFO) storage devices are variable-length buffers in that the input rate may be variable while the output rate is constant or the output rate may be variable while the input rate is constant. Various clocking… (Read More →)

See continuously variable slope delta modulation.

In statistics, in a population of samples, the mean of the squares of the differences between the respective samples and their mean, expressed mathematically as: where n is the number of samples, xi is the value of sample i, is the mean of the samples, and 2 is the variance.
Note: The square root of the variance, , is the… (Read More →)