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Cisco ONS 15327 User Documentation, R3.3
June 2002
Chapter 5 SONET Topologies
Unidirectional Path Switched Rings
5.3.1 Example UPSR Application
shows a common UPSR application. OC-3 optics provide remote switch connectivity to a
host GR-303 switch. In the example, each remote switch requires eight DS-1s to return to the host
switch.
and
show the shelf layout for each site.
Figure 5-18 An OC-3 UPSR
Node ID 0 has two XTC-28-3 cards to provide 28 active DS-1 ports. The other sites only require XTC-14
cards to handle the eight DS-1s to and from the remote switch. You can use the other half of each ONS
15327 shelf assembly to provide support for a second or third ring to other existing or planned remote
sites.
In this sample OC-3 UPSR, Node ID 0 contains four DS1-14 cards and two OC3 IR 4 1310 cards. Six
free slots also exist in this setup and can be provisioned with cards or left empty.
shows the
shelf setup for these cards.
8 DS-1s
8 DS-1s
8 DS-1s
GR-303
Switch
ONS 15327
Node ID 0
ONS 15327
Node ID 1
ONS 15327
Node ID 2
ONS 15327
Node ID 3
= Fiber 1
= Fiber 2
78233
Summary of Contents for ONS 15327
Page 22: ...Contents xxii Cisco ONS 15327 User Documentation June 2002 I N D E X ...
Page 30: ...Figures xxviii Cisco ONS 15327 User Documentation June 2002 ...
Page 44: ...Procedures xlii Cisco ONS 15454 Installation and Operations Guide R3 2 June 2002 ...
Page 540: ...Glossary GL 16 Cisco ONS 15327 User Documentation R3 3 June 2002 ...