A Dedicated Telephone Switch or Virtual Switching Device That Connects

question 47

Multiple Choice

A dedicated telephone switch or virtual switching device that connects and manages calls within a private organization, and manages call connections that exit the network through a VoIP gateway, is known by what term?

• A) VoIP router
• B) VoIP PBX (private branch exchange)
• C) VoIP LEC (local exchange carrier)
• D) VoIP ATB (analog telephone branch)

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Definitions:

Variance

A measure of the dispersion or spread of a set of values, indicating how much the values differ from the mean of the set.

Population

The set of all elements of interest in a particular study.

F Distribution

A probability distribution that arises in the analysis of variance and is used to calculate differences among group means when the groups have different sizes.

Degrees of Freedom

The number of independent values or quantities which can be assigned to a statistical distribution, often related to the number of values in the final calculation of a statistic that are free to vary.