PSTN operation and maintenance
nDifferent alarm
classes
nVital functions and
circuits
(as SS7 and group switch)
may use secured paths and
backups
Programs provided for:
(as SS7 and group switch)
may use secured paths and
backups
Programs provided for:
ntroubleshooting
nfault
diagnostics
nhardware faults can
be isolated
be isolated
nSupervision is
realized also
by connecting maintenance
units to the network
by connecting maintenance
units to the network
A supervision plan by
network levels:
network levels: