Both CN and CP have different ways of doing things on the radio - with a few listens it should be easy to figure out whats going on. Click on the following options to navigate:

A great many resources went into making this section. They include
(in no particular order...):

Paul Cordingley's Rails in Toronto Site http://home.inforamp.net/~crs1026/
Bill Miller's The View from Galt Station http://www.trainweb.org/galt-stn/
Brian Bukowski's CROR http://www.vex.net/~bri/CROR/CN-GLR-9602/  
Mark Liddell's Guide to Hamilton http://www.globalserve.net/~mliddell/
The Search Canada's TAFL site http://neon.polkaroo.net/~darkwing/tafl/
Industry Canada's TAFL http://spectrum.ic.gc.ca/tafl/tafl-e/tafledat.html
Ron Katz's ONTSCAN site http://www.ontscan.com
Bytown Railway Society's Canadian Trackside Guide