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Issue 1 September 1995 1-1
1
Overview and Roadmap
This chapter presents general information about the methods to configure your
DEFINITY System Generic 3 for system availability.
It also provides a roadmap (a high-level overview of the sequence of steps) for
the installation of the system. The roadmap provides references to the
appropriate chapter in this book or other books for detailed instructions.
System Reliability
The DEFINITY System G3 provides various system reliability configurations or
duplication options. These reliability configurations provide for duplication of G3
system components for higher system availability. The following three types of
reliability supply your system’s needs:
■ Standard Reliability
■ High Reliability
■ Critical Reliability
Within these configuration options, you can duplicate the following components:
■ Processor Port Network (PPN) Control Carrier
■ Expansion Port Network (EPN) Control Carrier
■ Inter-Port Network (PN) Connectivity (fibre-optic cabling)
■ Tone-Clock
Chapter 4, "Install and Connect the Cabinets" provides more detail on system
reliability configurations.