Nortel DMS-100 Manual page 16

One connection is present between the two activities that the SRC coordinates.
The connection is that PM maintenance initiated through the dependency
manager can lead to loading of one or more PM units.
Figure 1-1 System recovery controller
Subsystems
Series I PM
maintenance
System recovery controller
Dependency manager
DMS core
Series II PM
Series III PM
maintenance
maintenance
Group manager
Database
Switch
operating system
DMS-100 Family NA100 Recovery Procedures LET0015 and up
System recovery controller 1-3
Message
Network
switch
maintenance
maintenance
Concurrent activity
manager