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We are pleased to provide four Voice over IP calculators for assisting in the technical design and analysis of VoIP.  They can be used online, now, and are free of charge.  Please select a calculator to use by clicking on a link on the left side of this window.

Lines and IP Bandwidth Calculator

The Lines and IP Bandwidth Calculator can be used to estimate the bandwidth required through an IP based network for a fixed number of voice paths.

Erlangs and Bandwidth Calculator

The Erlangs and Bandwidth Calculator can be used to estimate the bandwidth which must be provided through an IP based to satisfactorily transport a given busy hour traffic level.

Minutes and Lines Calculator

The Minutes and Lines Calculator can be used to estimate the number of voice paths that should be provided through a wide area network if you know the number of minutes of calls which the two voice switches interconnected by that network will generate each day.

Erlangs and Lines Calculator

The Erlangs and Lines Calculator can be used to estimate the number of voice paths required between two network elements if the traffic volume between those nodes is known.  It uses Erlangs rather than call minutes as the units for call volume.
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Last modified: 14 October 2007

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