Your standard airport aviation freq are...
Frequency
133.70000 Information Service (ATIS) - English
127.50000 Information Service (ATIS) - French
119.90000 Tower
125.60000 Clearance Delivery
124.65000 Departures/Arrivals
118.90000 Departures/Arrivals
126.90000 Low Level Arrivals (Localizers)
121.90000 Ground
122.07500 Apron
134.15000 Montreal Terminal
125.15000 Montreal Terminal
Plus the trunked systems for the airport fire crash team and the ADM security agents
www.radioreference.com/apps/db/?sid=3279
SPVM Airport Unit (PDQ-55) are on the SERAM encrypted network