Yes the 149.4400 mhz is the pager frequency that is used for the pagers that District EMS carry with them.
Each EMS station has a different code programmed into it same as the pagers for alerting them for a call.
The 149.4400 mhz frequency is also simulucasted on the UHF frquencys too
-414.2875 Niagara
-410.8375-Halton
-414.7125-Peel
-410.6375-Simcoe/York
Although, unknown of what types of Base Paging units / Manufactures being used.
The base paging units are used similar if not the same as belt/hip worn pagers.
This does not include TEMS as they are on a commercial 900mhz pocsag system