Someone

101-120 - Supervisors
122 - Subway Line Supervisor
199 - Subway Line Mechanic Supervisor
143 - Cheif Supervisor
147 - Fare Supervisor
148 - Transit Patrol Security
201-220 - TTC Armoured Trucks
299 - Subway Line Mechanic
301-310 - Streetcar Track/Overhead Maintenence
506 - Station Janitor

135A = Power Control
142 = Subway Route Supervisor (you'd hear 142 at Kennedy or some such)
143 = Cheif Supervisor (143 East, West, North, Central, South)
147 = Fare Supervisor (they use initials - 147 MI, etc...)
148 = Transit Security (148 North, West, South, Central, 1A, 2B, etc...)
199 = Subway Line Mechanic Supervisor
201
to
220 = Fare Collectors (armoured vehicles)
299 = Subway Line Mechanic
301
to
320 = Streetcar Track/Overhead maintenence
506 = Station Janitor
630
to
649 = Electricians and Signal Maintenence
828 = Streetcar Switch maintenence