SSI??? are you trying to monitor S.I.M. ? service Incendie Montreal
anyhow i'm not sure what you're asking.. if it's Montreal it's very simple 4 control chan's Motorola system
check coderouge.com under communications all 12 freqs are there although you only need the 4 control channels and the t/g's are listed also
866.1625 Control
866.2875 Control
866.5375 Control
866.6625 Control
866.7875 Voice Channel
867.0375 Voice Channel
867.1625 Voice Channel
867.2875 Voice Channel
867.4375 Voice Channel
867.6625 Voice Channel
867.7875 Voice Channel
867.8875 Voice Channel