Glossary:

ATIS Telecom Glossary

Search Keyword By: V

Select a term name to open its entry and any media references. Longer definitions end with a “Read More” link.

VoiP

Voice over Internet Protocol

VoIP Positioning Center

The VPC is a NENA i2 functional element that provides routing information based on location of VoIP emergency calls. It also delivers location information to the PSAP over the existing ALI DB infrastructure.

VoIP Positioning Center (VPC)

The VPC is a NENA i2 functional element that provides routing information based on location of VoIP emergency calls. It also delivers location information to the PSAP over the existing ALI DB infrastructure.

volatile storage

A storage device in which the contents are lost when power is removed.

volt-amperes reactive (vars)

In alternating-current power transmission and distribution, the product of the rms voltage and amperage, i.e., the apparent power, multiplied by the sine of the phase angle between the voltage and the current.
Note 1: Vars represents the power not consumed by a reactive load, i.e., when there is a phase difference between the applied voltage and the current.
Note 2:… (Read More →)

voltage rating

The highest voltage that can be applied to a wire or conductor in conformance with standards.

voltage standing wave ratio (VSWR)

In a transmission line, the ratio of maximum to minimum voltage in a standing wave pattern.
Note: The VSWR is a measure of impedance mismatch between the transmission line and its load. The higher the VSWR, the greater the mismatch. The minimum VSWR, i.e., that which corresponds to a perfect impedance match, is unity.

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