Cisco ONS 15454 SDH Specifications Page 225

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5-35
Cisco ONS 15454 SDH Installation and Operations Guide, R3.3
May 2002
Chapter 5 SDH Topologies
Adding Nodes to an MS-SPRing
Step 7 If the new node will connect to third-party equipment that cannot transport the K3 byte, see the Remap
the K3 Byte procedure on page 5-28 to remap STM-16 cards trunk card that connects to the third-party
equipment. Make sure the trunk card at the other end of the span is mapped to the same byte set on the
new node.
Step 8 Complete the Provision the MS-SPRing procedure on page 5-29.
Procedure: Switch MS-SPRing Traffic Before Connecting a New Node
Step 1 Log into the existing node that will connect to the new node through its east port (Node 4 in the
Figure 5-27 example).
Figure 5-27 A three-node MS-SPRing before adding a new node
Caution Traffic is unprotected during a protection switch.
Step 2 Switch protection on its east port:
a. Click the Maintenance > Ring tabs.
b. From the East Switch list, choose FORCE RING. Click Apply.
Performing a FORCE switch generates a manual switch request on an equipment (MANUAL-REQ)
alarm. This is normal.
Purpose Use this procedure to route traffic away from the area of the ring where
service will be performed.
Prerequisite Procedures Install Cards and Configure the New MS-SPRing Node procedure on
page 5-34
Onsite/Remote Onsite or remote
68118
West East
West East
West East
West East
Slot 5
Tx
Rx
Slot 12
Tx
Rx
Node 3
Slot 5
Tx
Rx
Slot 12
Tx
Rx
Node 2Node 1
Slot 5
Tx
Rx
Slot 12
Tx
Rx
Node 4
Slot 5
Tx
Rx
Slot 12
Tx
Rx
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