Example Upsr Application; Figure 5-22 An Oc-3 Upsr - Cisco 15454-TCC - Network Processor Card Operation Manual

Unidirectional Path Switched Rings

5.3.1 Example UPSR Application

Figure 5-22
host TR-303 switch. In the example, each remote switch requires eight DS-1s to return to the host switch.
Figure 5-23

Figure 5-22 An OC-3 UPSR

8 DS-1s
Node ID 0 has four DS1-14 cards to provide 56 active DS-1 ports. The other sites only require two
DS1-14 cards to handle the eight DS-1s to and from the remote switch. You can use the other half of
each ONS 15454 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.
shelf setup for these cards.
Cisco ONS 15454 Installation and Operations Guide
5-28
shows a common UPSR application. OC-3 optics provide remote switch connectivity to a
and Figure 5-24 show the shelf layout for each site.
ONS 15454
ONS 15454
Node ID 3
ONS 15454
TR-303
Switch
Node ID 0
ONS 15454
Node ID 1
Node ID 2
8 DS-1s
Chapter 5 SONET Topologies
8 DS-1s
= Fiber 1
= Fiber 2
Figure 5-23 shows the
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