Reviewing the Wiki entry for Baltimore County, there are still references to the North and South systems: is this still the case?
"The third battalion is assigned AC 30 thru TAC 39 and AC 40 thru TAC 49. These are non-wide-area talk groups that will only work on the south system."
and
"There are two sets of non-wide-area talk groups for the north system, AC 110 thru TAC 119 and AC 120 thru TAC 129. These are currently not regularly assigned, and are reportedly for site trunking and failsoft conditions.
Also, what are the channel positions for the dispatch tg? A1,B1,C,1,D1, etc? What channel positions for the North, Central, East and West tgs, and what exact is their defined use? Seems to be mostly EMS dispatcher describing patient symptoms.