Example Upsr Application; Figure 5-18 An Oc-3 Upsr - Cisco ONS 15327 User Documentation

Unidirectional Path Switched Rings

5.3.1 Example UPSR Application

Figure 5-18
host GR-303 switch. In the example, each remote switch requires eight DS-1s to return to the host
switch.

Figure 5-18 An OC-3 UPSR

8 DS-1s
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.
shelf setup for these cards.
Cisco ONS 15327 User Documentation, R3.3
5-22
shows a common UPSR application. OC-3 optics provide remote switch connectivity to a
Figure 5-19 and Figure 5-20
ONS 15327
Node ID 3
show the shelf layout for each site.
GR-303
Switch
ONS 15327
Node ID 0
ONS 15327
Node ID 1
ONS 15327
Node ID 2
8 DS-1s
Chapter 5 SONET Topologies
8 DS-1s
= Fiber 1
= Fiber 2
Figure 5-19 shows the
June 2002