![](/s/en_GB/3145/191/_/images/icons/emoticons/warning.png)
Extensions are individually named, and can be organised into
Extension Groups for the purposes of reporting and administration. This
administration is done using the Extensions screen, accessible
by pressing the button on the function button panel
on the main screen.
If a call is made or received on an extension that TIM didn't previously know about, it automatically allocates it to a special group called New Extensions. You can then move these newly-discovered extensions into groups you've already set up, or into new groups which you can create.
![Extensions](http://www.tri-line.com/common/img/documentation/tim_professional/extensions.png)
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