# Advanced threshold parameters

The box **Inverse interval** is used to define non-contiguous ranges. In this example, the module will change to the critical state if the value is below 20 or above 80:

[![quickguide_inverse1.png](https://pandorafms.com/guides/public/uploads/images/gallery/2023-08/scaled-1680-/quickguide-inverse1.png)](https://pandorafms.com/guides/public/uploads/images/gallery/2023-08/quickguide-inverse1.png)

In string-type modules, the threshold is defined as a substring. Similarly, it can be inverted so that the module goes to `CRITICAL` if **no** contains the substring passed as a par meter:

[![quickguide_inverse2.png](https://pandorafms.com/guides/public/uploads/images/gallery/2023-08/scaled-1680-/quickguide-inverse2.png)](https://pandorafms.com/guides/public/uploads/images/gallery/2023-08/quickguide-inverse2.png)

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