This isn't how dispatch works... I haven't seen the danish film.
But, this film isn't how the 911 operations office works in SoCal. Granted most people haven't worked 911, don't know dispatchers in real life. But even using commonsense the average person should be able to pick-up how this is not how things are.
First, shakey-cam takes away from the story.
The scene setting of the 911 office is correct. It's very dark, extremely quiet. But, there is a good amount of foot traffic of officers, detectives and supervisors passing by every few minutes as you sit receiving calls. There are so many calls coming in, that even one dispatcher focusing on what Jake does, would throw things out of whack.
The script is tedious, unrealistic, not interesting. The 6 year old, sounds like a woman acting badly in a child's voice.
The entire film he essentially is supposedly orchestrating all these things, on his own, battling everyone he comes up against.