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Cisco Systems 15454M6DC Manual De Usuario

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5-27
Cisco ONS 15454 Installation and Operations Guide
November 2001
Chapter 5      SONET Topologies
Unidirectional Path Switched Rings
Figure 5-20 A basic four-node UPSR
Figure 5-21 A UPSR with a fiber break
ONS 15454
Node ID 0
ONS 15454
Node ID 1
ONS 15454
Node ID 2
ONS 15454
Node ID 3
32148
= Fiber 1
= Fiber 2
Span 1
Span 2
Span 3
Span 4
Span 8
Span 7
Span 6
Span 5
Fiber
break
Source
Destination
32639
ONS 15454
Node ID 0
ONS 15454
Node ID 1
ONS 15454
Node ID 2
ONS 15454
Node ID 3
= Fiber 1
= Fiber 2