Table 12-4 Comparison Of The Protection Schemes - Cisco 15454-DS1-14= - 1.544Mbps Expansion Module Reference Manual

12.5 Comparison of the Protection Schemes
Figure 12-26
12.5 Comparison of the Protection Schemes
Table 12-4
Table 12-4
Topology
Path Protection
Two-Fiber BLSR
Four-Fiber BLSR
Two-Fiber BLSR DRI
Path Protection DRI
1. N equals the number of ONS 15454 nodes configured as BLSR nodes.
2. PT equals the number of STS-1 circuits passed through ONS 15454 nodes in the ring (capacity can vary depending on the
Cisco ONS 15454 Reference Manual, R8.5
12-28
Path Protection to BLSR Integrated DRI Handoff on the Detailed Circuit Map
shows a comparison of the different protection schemes using OC-48 as an example.
Comparison of the Protection Schemes
traffic pattern).
Protected
Bandwidth
Between
Ring Any Two
Capacity Nodes
48 - PT STS 1-48
1
24 x N - STS 1-24
2
PT
48 x N - PT STS 1-48
(Fiber 1)
24 x N - PT STS 1-24
48 - PT STS 1-48
Chapter 12 SONET Topologies and Upgrades
Protection
Channel Dual
Access Failure
Not Not
supported supported
STS 25-48 Not
supported
STS 1-48 Supported
(Fiber 2)
STS 25-48 Supported
Not Supported
supported
Number of Cards
2 x N
2 x N
4 x N
(2 x N) + 4
(2 x N) + 4
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