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Chapter 5
SONET Topologies
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Procedure: Install the BLSR Trunk Cards
Step 1
Install the OC-12, OC-48, OC-48AS, or OC-192 cards that will serve as the BLSR trunk cards. You can
install the OC-12 and OC-48AS cards in any slot, but you can install the OC-48 and OC-192 cards only
in Slots 5, 6, 12, or 13.
Allow the cards to boot.
Step 2
Attach the fiber to the east and west BLSR ports at each node.
Step 3
Plan your fiber connections and use the same plan for all BLSR nodes. For example, make the east port
the farthest slot to the right and the west port the farthest left. Plug fiber connected to an east port at one
node into the west port on an adjacent node.
with trunk cards in Slot 5 (west) and Slot 12 (east).
Note
For four-fiber BLSRs, use the same east - west connection pattern for the working and protect fibers. Do
not mix working and protect card connections. The BLSR will not function if working and protect cards
are interconnected.
12 (east) carry the working traffic. Slot 6 (west) and Slot 13 (east) carry the protect traffic.
November 2001
Create the BLSR DCC terminations. See the
page
5-13.
Enable the BLSR ports. See the
Set up BLSR timing. See the
Provision the BLSR. See the
Always plug the transmit (Tx) connector of an OC-N card at one node into the receive (Rx)
connector of an OC-N card at the adjacent node. Cards will display an SF LED if Tx and Rx
connections are mismatched.
Figure 5-12
"Create the BLSR DCC Terminations" procedure on
"Enable the BLSR Ports" procedure on page
"Set up ONS 15454 Timing" procedure on page
"Provision the BLSR" procedure on page
Figure 5-11
shows fiber connections for a two-fiber BLSR
shows fiber connections for a four-fiber BLSR. Slot 5 (west) and Slot
Cisco ONS 15454 Installation and Operations Guide
Bidirectional Line Switched Rings
5-13.
3-14.
5-14.
5-11
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