Four-Fiber Blsrs - Cisco ONS 15454 Reference Manual

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12.2 12.2.2 Four-Fiber BLSRs

12.2.2 Four-Fiber BLSRs

Four-fiber BLSRs double the bandwidth of two-fiber BLSRs. Because they allow span switching as well

as ring switching, four-fiber BLSRs increase the reliability and flexibility of traffic protection. Two

fibers are allocated for working traffic and two fibers for protection, as shown in

implement a four-fiber BLSR, you must install four OC-48, OC-48 AS, or OC-192 cards at each BLSR

Cisco ONS 15454 Reference Manual, R7.0.1

Four-Node, Two-Fiber BLSR Traffic Pattern Following Line Break

SONET Topologies and Upgrades

Traffic flow