Cisco Systems 15454M6DC 사용자 설명서
5-28
Cisco ONS 15454 Installation and Operations Guide
78-13453-01
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 TR-303 switch. In the example, each remote switch requires eight DS-1s to return to the host switch.
show the shelf layout for each site.
Figure 5-22 An OC-3 UPSR
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.
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.
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
TR-303
Switch
32149
ONS 15454
Node ID 0
ONS 15454
Node ID 1
ONS 15454
Node ID 2
ONS 15454
Node ID 3
Node ID 3
= Fiber 1
= Fiber 2