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All remote modem users share a common pool of modem resources. Users can dial in to either POP.
The dial POPs are redundant. If one POP loses service, traffic is re-routed to the other POP.
Describing how traffic is re-routed is outside the scope of this case study, and the diagrams in the
case study show simplified IP paths only.
THEnet uses this model to identify the different functional areas of the dial NMS:
F = Fault management
C = Configuration management
A = Accounting management
P = Performance management
S = Security management
A dial NMS provides the FCAPS management functions for a DIAS.
A dial NMS:
Increases network availability
Improves end-user satisfaction by improving service performance
Provides fault-isolation capabilities, which improves fault-analysis information
Reduces network support costs
Enables capacity plannning
Enables security improvements
Provides accounting (for example, billing and chargeback)
Processes important connection events and alarms for statistical analysis
Provides performance-reporting capabilities for a dial Internet access service
Enables standardized software releases (for example, software versions and configuration files)
Addresses the perception problems that are commonly associated with dial access networks
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