Cisco Systems 15454M6DC Manual De Usuario

5-6

Cisco ONS 15454 Installation and Operations Guide

78-13453-01

Chapter 5 SONET Topologies

Bidirectional Line Switched Rings

Figure 5-5

A four-fiber BLSR span switch

Figure 5-6

A four-fiber BLSR ring switch

Node 0

Node 1

Node 2

Node 3

Span 1

Span 2

Span 3

Span 4

Span 8

Span 7

Span 6

Span 5

OC-48 Ring

= Working fibers

= Protect fibers

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