Figure 8-9 Connecting Fiber To A Four-Node, Two-Fiber Blsr - Cisco ONS 15600 Reference Manual

8.3.4 BLSR Fiber Connections
Always plug the transmit (Tx) connector of an OC-N port at one node into the receive (Rx) connector of
Note
an OC-N port at the adjacent node. Cards display an SF LED when Tx and Rx connections are
mismatched.
Figure 8-9
West
West
For four-fiber BLSRs, use the same east-west connection pattern for the working and protect fibers. Do
not mix working and protect port connections. The BLSR does not function if working and protect ports
are interconnected.
Figure 8-10
(east) carry the working traffic. Slot 3/Port 1 (west) and Slot 13/Port 1 (east) carry the protect traffic.
Cisco ONS 15600 Reference Manual, R8.0
8-10
Connecting Fiber to a Four-Node, Two-Fiber BLSR
Tx Tx
Rx Rx
East
Slot 4 Slot 12
Port 1 Port 3
Node 1
Tx Tx
Rx Rx
East
Slot 4 Slot 12
Port 1 Port 3
Node 4
shows fiber connections for a four-fiber BLSR. Slot 2/Port 7 (west) and Slot 12/Port 11
Chapter 8 SONET Topologies and Upgrades
Tx Tx
Rx Rx
West
Slot 4 Slot 12
Port 1 Port 3
Node 2
Tx
Rx
West
Slot 4 Slot 12
Port 1 Port 3
Node 3
East
Tx
Rx
East