Hi!
First off, congrats. I work on the other side of the radio (Ambulance/Heavy Rescue). Public safety is a great field to be in imo.
That said, make sure you establish what the actual job is. Many counties will use "Dispatcher" interchangably with call taking. You will be answering 911 calls one day and dispatching police, fire, or EMS the next day. It's not as static as many people say is what I'm told, which can be good or bad depending on your feelings about that.
Calltaking can definitely be stressful if you mind people being rude, but it's something that can be overcome.
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Diagnosed Asperger's DSM IV ~2003.