In Christchurch New Zealand we have the same bells for Aircraft incidents as we do for any other call.. The difference we have is, for aircraft incidents we get it on the Tower EAS line to our watchroom, this opens up the PA lines throughout the Stn and we get the call, I would suspect most of you have something in common to this.. Then the watchman enters the data into the EAS computer and it goes out to all othe civi agencies Police/Fire/Ambo etc and the screens in our vehs.
other calls come in on emergency phone or PABX line, watchman enters data into EAS computer and then hits the alarm, crews go to there veh and respond once they have checked there screen for call details... If the screen is blank they are not needed.
So for domestic,medical calls its normally our RIV that goes, so entering a medical into the EAS it goes only to our RIV and Chief Veh...
hope this helps