Opus great work on this mod. It is now very realistic. I am a real, though part time, police officer working in a European city. During a shift a large amount of officers and patrol cars are availible for dispatch. Verbally calling dispatch would create a big mess on the air so we use the MDT to alert dispatch that we need to speak to them. We have two choices we push a number 6 button to alert dispatch that we need to speak them when we are making a traffic stop or when we want to give them an update when attached to a call. Dispatch then decides depending on priority with other calls and evolving incidents when to contact. If we want contact without delay (not a direct emergency) we push a number 7 button what gives priority with dispatch.
Maybe this is an idea for your MDT.