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Cisco ONS 15454 Installation and Operations Guide
78-13453-01
Chapter 5 SONET Topologies
Linear ADM Configurations
c. Verify that the working slot is carrying traffic. If it is, continue to Step (d). If not, clear the conditions
that prevent the card from carrying working traffic before proceeding.
d. From the Switch Commands, select Clear. A Confirm Clear Operation dialog is displayed.
e. Click Yes on the confirmation dialog box.
Step 5 Repeat Step 4 for each group in the 1+1 Protection Groups list at all nodes that will be converted.
Step 6 For each node, delete the 1+1 OC-N protection group that supports the linear ADM span:
a. Click the Provisioning > Protection tabs.
b. From the Protection Groups list, choose the group you want to delete. Click Delete.
c. Click Yes on the confirmation dialog box.
d. Verify that no traffic disruptions are indicated on the SONET test set. If disruptions occur, do not
proceed. Add the protection group and begin troubleshooting procedures to find out the cause of the
disruption.
Note Deleting a 1+1 protection group may cause unequipped path (UNEQ-P) alarms to occur.
Step 7 Physically remove one of the protect fibers running between the middle and end nodes. In the
Figure 5-38 example, the fiber running from Slot 13/Node 2 to Slot 13/Node 3 is removed. The
corresponding end-node trunk card will display an LOS alarm.
Figure 5-38 Converting a linear ADM to a BLSR
Step 8
Physically reroute the other protect fiber so it connects the two end nodes. In the Figure 5-38 example,
the fiber between Node 1/Slot 5 and Node 2/Slot 5 is rerouted to connect Node 1/Slot 5 to Node
3/Slot/ 13.
If you are leaving the OC-N cards in place, go to Step 13. If you are removing the cards, complete Steps
9 – 12. (In this example, cards in Node 2/Slots 5 and 13 are removed.)
Slot 6 to Slot 6
Linear
ONS 15454
Node 1
Slot 5 to Slot 5
Slot 12 to Slot 12
ONS 15454
Node 2
Slot 13 to Slot 13
ONS 15454
Node 3
Slot 6
(East)
BLSR
ONS 15454
Node 1
ONS 15454
Node 2
ONS 15454
Node 3
Slot 6
(West)
Slot 12
(East)
Slot 12
(West)
Slot 13
(East)
Slot 5
(West)
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