Radios and Emergency Activation Buttons

What is your departments' procedure for an activation of the emergency button on someones radio at a fire scene? Is it different if it happens while not on a scene?
Our County has been using hte 800 Mhz radios for a little over a year now. Our current procedure is:
If the Emergency button is pressed then Dispatch will call the firefighter and ask if there is an emergency if so then the dispatcher will call the IC and let him know the name associated with the radio in distress. It is pretty much the same if not on scene except since there is no IC to call, the dispatcher only checks with the Firefighter and then will dispatch the appropriate agency if there is a true emergency, if not they just make sure the firefighter resets his radio correctly.