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Cisco ONS 15454 SDH Procedure Guide, R7.0
78-17194-01
Chapter 20 DLPs D300 to D399
DLP- D338 Install Fiber-Optic Cables for MS-SPRing Configurations
DLP-D338 Install Fiber-Optic Cables for MS-SPRing Configurations
Note To avoid error, connect fiber-optic cable so that the farthest slot to the right represents the east port, and
the farthest slot to the left represents the west port. Fiber connected to an east port at one node must plug
into the west port at an adjacent node.
Caution Do not provision MS-SPRing east and west ports on the same STM-N card.
Step 1 Plan your fiber connections. Use the same plan for all MS-SPRing nodes.
Step 2 Plug the fiber into the Tx connector of an STM-N card at one node and plug the other end into the Rx
connector of an STM-N card at the adjacent node. The card displays a SF LED if the transmit and receive
fibers are mismatched.
Note Do not mix working and protect card connections when connecting a four-fiber MS-SPRing. The
MS-SPRing does not function if working and protect cards are interconnected. See Figure 20-10
on page 20-39 for an example of correct four-fiber MS-SPRing cabling.
Step 3 Repeat Step 2 until you have configured the ring.
Figure 20-9 shows fiber connections for a two-fiber MS-SPRing with trunk (span) cards in Slot 5 (west)
and Slot 12 (east).
Purpose This task installs the fiber optic cables to the east and west MS-SPRing
ports at each node. See Chapter 5, “Turn Up a Network” to provision and
test MS-SPRing configurations.
Tools/Equipment Fiber-optic cables
Prerequisite Procedures NTP-D112 Clean Fiber Connectors, page 15-15
Required/As Needed As needed
Onsite/Remote Onsite
Security Level None
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