Specifications

5-14
Cisco ONS 15454 Installation and Operations Guide, R3.2
March 2002
Chapter 5 SONET Topologies
Bidirectional Line Switched Rings
Figure 5-14 Enabling an optical port
Step 6
Repeat Steps 2 – 4 for the other optical card configured as a DCC termination.
Step 7 (Four-fiber BLSR only) Repeat Steps 2 – 4 for each protect card.
Step 8 Repeat Steps 2 – 5 at each node that will be in the BLSR.
After configuring the SONET DCC, set the timing for the node. For procedures, see the “Setting Up ONS
15454 Timing” section on page 3-12. After you configure the timing you can provision the BLSR.
Procedure: Remap the K3 Byte
K3 byte remapping should only be performed when specifically required to run BLSRs through third
party equipment that cannot transparently transport the K3 (see “K3 Byte Remapping” section on
page 5-7). K3 bytes can only be remapped on OC48AS cards.
Step 1 Log into one of the nodes that connects to the third party equipment.
Step 2 Double-click the OC48AS card that connects to the third party equipment.
Step 3 Click the Provisioning > Line tabs.
Step 4 Click BLSR Ext Byte and choose the alternate byte: Z2, E2, or F1.
Step 5 Click Apply.
Step 6 (Four-fiber BLSR only) Repeat Steps 2 – 5 for each protect card.
Step 7 Repeat Steps 2 – 5 at the node and card on the other end of the BLSR span.