Lucent Technologies 555-230-024 manual Standard Reliability, High Reliability

Introduction

■DEFINITY’s universal hardware and flexible software allow systems to be reconfigured quickly in emergency situations. Port networks can be added and network routing can be changed in a matter of minutes.

Based on the needs of your organization, three redundancy configurations are available:

■Standard Reliability

■High Reliability

■Critical Reliability

Standard Reliability

The built-in duplication of many of its parts makes the system inherently reliable. In addition to the dual bus, the system includes:

■One control carrier

■One tone-clock circuit pack per port network

■Port networks interconnected by single fiber cables

High Reliability

High reliability systems include the following:

■Two control carriers (located in the Processor Port Network cabinet), which contain duplicate processor and tone-clock circuit packs (one is active and the other is in standby)

■One tone-clock circuit pack per Expansion Port Network

■Duplicate connections between the Center Stage Switch and the Processor Port Network

■Expansion port networks connected by single fiber cables

■Duplicate switch node clock circuit packs (one is active and the other is in standby) in each switch node carrier

Figure 1-8shows a high reliability, directly connected system.

1-16Issue 5 January 1998 555-230-024