I've noticed they changed too. It does something like a warble tone before every call but only on the VHF frequency not on the trunked dispatch channel.I'm also noticing that the two tone signalling isn't being used. I had one of my scanners configured for Station 4 (it is right across the street from me) and it doesn't trigger any more.
Sounds about right. Anne Arundel had a problem several years ago when they were dispatching with the assumption stations - including units who are "on the air" - were always listening and could hear the dispatches. This lead to many units being delayed in responding. The solution was to make the dispatcher aware (via CAD) that some units on the call about to be dispatched were not in station. Under these conditions, the dispatcher makes extra announcements to make sure they know a dispatch for them is coming and also confirm after the dispatch that they heard it. From what I heard in Howard, this doesn't happen as the whole dispatch sounded "sterile". Still, we know it works in many places and their so much technology out there now (pagers, mobile data terminals, iPads, etc.) the verbal alert at this point is more of a "get people moving" feature. It gives the crew a chance to begin formulating a response plan while getting ready to respond.Supposedly it worked great for station alerting but wasn't great for on air dispatch. Changes coming in the next 24 hours.