During the summer i was talking with a Labton fire fighter and he made mention they were going to Trbo.
Since sarnia fire, transit and PW are trbo dont seem like much of a stretch. Couple sites maybe IP site connect.
Their current system is just VHF radios and EDACs gear in the trucks to act as repeaters for the wide area coverage.
I can say the EDACS system is on its last leg. Couple times this year the Wallaceburg CACC who dispatched lambton county fire/ems couldnt get a hold of a few stations via pager or the radio. Few times iv herd calls and one station cant talk to another, or they can copy each other but dispatch dont hear a thing. Pages fail and calls dont get paged and dispatch has to call the station by phone. Lambton county is 1 of 3 edacs systems left in ontario.. and i wont be sad to see it go