Cisco CX-FEIP-2TX= Installation and con?guration Specifications Page 220

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5-42
Cisco ONS 15454 Installation and Operations Guide, R3.2
March 2002
Chapter 5 SONET Topologies
Linear ADM Configurations
Figure 5-33 Configuring two BLSRs on the same node
5.5 Linear ADM Configurations
You can configure ONS 15454s as a line of add/drop multiplexers (ADMs) by configuring one set of
OC-N cards as the working path and a second set as the protect path. Unlike rings, linear (point-to-point)
ADMs require that the OC-N cards at each node be in 1+1 protection to ensure that a break to the
working line is automatically routed to the protect line.
Figure 5-34 shows three ONS 15454s in a linear ADM configuration. Working traffic flows from Slot
6/Node 1 to Slot 6/Node 2, and from Slot 12/Node 2 to Slot 12/Node 3. You create the protect path by
placing Slot 6 in 1+1 protection with Slot 5 at Nodes 1 and 2, and Slot 12 in 1+1 protection with Slot 13
at Nodes 2 and 3.
Figure 5-34 A linear (point-to-point) ADM configuration
Node 1
Node 3
Node 2
Slot 5 to Slot 5
Slot 6 to Slot 6
Slot 12 to Slot 12
Slot 13 to Slot 13
Working Path
Protect Path
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