Important!

An OMD circuit pack with an available OCH port is required in a Function/Growth slot at each node that terminates the OC-n span to be upgraded.

If required, install an OMD circuit pack in a Function/Growth slot.

Reference:

Procedure 4-25: Install DWDM optical multiplexer/demultiplexer circuit packs

If required, verify the active/standby status of the required OC-192 port and perform manual switches to switch traffic away from an active OC-192 port.

Reference:

Procedure 12-27.3: Verify active/standby status of OC-n port

NOTICE Service-disruption hazard

Removing the wrong fiber connections will result in a service interruption.

Using the work instructions, ensure that you remove only the fiber connections for the optical span being upgraded.

Important!

If the OC-192 port is active for transmission, disconnecting the optical fibers causes transmission switches. Transmission hits (less than 60 ms) will occur for each separate protection switch.

Disconnect the required OC-192 span fibers from the OLIU circuit pack/pluggable transmission module/port.

Result:

Transmission hits (less than 60 ms) may occur if traffic exists on the OC-192 port. If through traffic exists (UPSRs and BLSRs only), transmission hits (less than 60 ms) may occur at the nodes where the traffic is added/dropped.

The system reports an inc. OCN LOS alarm for the OC-192 port when the OC-192 span fibers are disconnected.

For BLSR protection groups, the system also reports a Line Automatic Switch condition for the OC-192 port.

Alarms may also be reported at other nodes in the network.

At the node at the opposite end of OC-192 span to be upgraded, repeat Step 1 through Step 3. Then continue with the next step.

If required, establish a DWDM point-to-point network using the span fibers to connect the OTS ports of the OMD circuit packs.

Reference:

Procedure 9-12: Establish DWDM network

Important!

The provisioned Expected Frequency of the OC-192 DWDM pluggable transmission module/port must match the OCH port frequency. If the provisioned Expected Frequency of the OC-192 DWDM pluggable transmission module/port and the OCH port frequency are different, attempts to provision an OCH cross-connection will be denied.

At the terminating nodes, install/provision the required OC-192 DWDM pluggable transmission module/port, and connect the OC-192 port to the required OCH port of the OMD circuit pack to add the OC-192 signal to the DWDM OTS span.

Result:

The inc. OCN LOS alarms clear. Transmission is now supported on the upgraded optical span.

Reference:

Procedure 10-15: Add optical channel (OCH) to DWDM network

STOP! To complete the upgrade, return to the procedure that directed you to perform this procedure.

End of steps