Cisco ONS 15454 Reference Manual page 391

Chapter 12 SONET Topologies and Upgrades
The ONS 15454 OC-3 card supports a total of four OC-3 ports so that two additional OC-3 spans
•
can be added at little cost.
Figure 12-8
14 DS-1s
8 DS-3s
Figure 12-9
OL-9217-01
Five-Node Two-Fiber BLSR
Carrier 1
2 OC-3s
56 local Carrier 2
DS-1s 12 DS-3s
Node 0
Node 4
4 DS-3s
shows the shelf assembly layout for Node 0, which has one free slot.
4 DS-3s 14 DS-1s
Node 1
Node 2
Node 3
14 DS-1s
Cisco ONS 15454 Reference Manual, R7.0.1
12.2 12.2.4 BLSR Application Example
2 DS-3s
14 DS-1s
= Fiber 1
= Fiber 2
12-11