The Call Minutes Calculator window

When you start the Traffic Calculators, a window will appear with four tab controls at the top. Select the tab Call Minutes.

The Call Minutes Calculator

The Call Minutes Calculator is divided into three sections:

1.	The top section is used to display and enter the daily traffic and number of lines required. Both entry areas in this section have associated radio buttons that you can use to indicate which quantity you are trying to calculate.

2.	The second section is used to enter the assumptions used by the calculator.

The final section contains one box that shows the Busy Hour Traffic corresponding to the displayed daily traffic. There is a small button to the right of this box. Pressing this button transfers the displayed busy hour traffic figure to the corresponding boxes in the Erlang B and Extended Erlang B calculators.

There are also five buttons at the right of the dialogue box that are used to perform calculations, stop calculations, close the programme, display previous results and access the on-line help system.

When entering figures into the edit boxes, a full stop or period should be used as a decimal mark, NOT a comma as is the convention in some European countries.