Well, not comm centres as we know them today, but I just used the term to make it more relevant to people who may be relatively new to the hobby.Officers dispatched mainly by their local detachments, no Comm Centres. Also the detachment dispatchers could/would talk to one another over the air. No mobile repeaters let alone a portable radio.
Barrie was a regional comm centre that covered Orillia to Alliston and Bala / Port Carling
area as well if I recall correctly (forgive me if I'm wrong on this as it's going back some).
And I think it was Aurora that covered King, Caledon, Bolton etc. and I don't remember if they dispatched for Downsview or not as well.
Might well have been though 458.8625 seems to have been used around Kanata as aI remember 458.8625 or 458.5625MHz. I could have told you for sure if I hadn't thrown out my PAC-RT that still had the crystals in it.