Sample Blsr Application; Figure 5-7 Blsr Bandwidth Reuse - Cisco 15454-TCC - Network Processor Card Operation Manual

Bidirectional Line Switched Rings
Figure 5-7
Node 3

5.2.4 Sample BLSR Application

Figure 5-8
to other carriers at Node 0. Traffic is delivered to the service provider's major hubs.
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Cisco ONS 15454 Installation and Operations Guide
5-8
BLSR bandwidth reuse
STS#1
STS#1
Node 2
shows a sample two-fiber BLSR implementation. A regional long-distance network connects
Carrier 1 delivers six DS-3s over two OC-3 spans to Node 0. Carrier 2 provides twelve DS-3s
directly. Node 0 receives the signals and delivers them around the ring to the appropriate node.
The ring also brings 14 DS-1s back from each remote site to Node 0. Intermediate nodes serve these
shorter regional connections.
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.
Node 0
STS#1
Node 1
STS#1
= Node 3 – Node 1 traffic
= Node 1 – Node 2 traffic
= Node 2 – Node 3 traffic
Chapter 5 SONET Topologies
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