Exchange control functions summarized
nMaintenance
functions
nsupervision
of subscriber lines and trunk circuits
nOperational
functions
nAdministrative
data as
nsubscriber
database
nrouting
database
nStatistical
data as
nfrom
where and whom subscribers call?
nHolding
times for different equipment types
nutilization
of IN services
nThe
control function produces many exchange services: