Now you all know you can customize the sound effects (yes, it's in your User Manual).
If you want to use your own 9-1-1 calls for the trainees to listen to and enter into CAD you can do this (especially if they are the screaming hang ups!).
-Upload your call mp3 - User Manual page B 17.
-Upload your matching address - if it's not in there - User Manual page B 18
Ready go! Select the actual ALI / call the student / hit the sound file.