AT&T 555-230-894 User Manual

Issue 1  September 1995 

 

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. 

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.