Sample Blsr Application; Figure 5-4 Blsr Bandwidth Reuse - Cisco ONS 15327 User Documentation

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SONET Topologies

5.2.3 Sample BLSR Application

to other carriers at Node 0. Traffic is delivered to the service provider's major hubs.

BLSR bandwidth reuse

shows a sample two-fiber BLSR implementation. A regional long-distance network connects

Carrier 1 delivers two DS-3s over one OC-3 span to Node 0. Carrier 2 provides two 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 15327 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 3 – Node 1 traffic

= Node 1 – Node 2 traffic

= Node 2 – Node 3 traffic

Cisco ONS 15327 User Documentation, R3.3

Bidirectional Line Switched Rings