Extron Control of Unison Pushbutton Stations

Is there a way to use an extron controller to emulate the pushbutton station or control unison presets?  I'm sure there is as I know creation is used to control unison at a church up the road from where I work.  Is it a relay module? or some other piece from ETC that I need to add?  I have an extron control system that I would like to set up to control the lighting presets in our venue.

Thanks For any help you can give!

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