![](/s/en_GB/3145/191/_/images/icons/emoticons/warning.png)
When in the extensions folder click on the button and the following prompt will appear:
![Adding an extension](http://www.tri-line.com/common/img/documentation/tim_professional/adding_extension_1.png)
Type your new extension number in the text box and press the
button. If the extension you are trying to enter already exists, you will be told.When you press the
button to add the extension, the following popup will appear. This allows you to configure the properties for that extension.![Adding an extension](http://www.tri-line.com/common/img/documentation/tim_professional/adding_extension_2.png)
Press
when you have finished entering all data. Note that any properties added here will be displayed when using the directory via TIM's web interface.The extension added can be found in the extensions list, as shown below:
![Adding an extension](http://www.tri-line.com/common/img/documentation/tim_professional/adding_extension_3.png)
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