Determine the current status of the upgrade at the node.

To verify that the original OC-3 port parameters are provisioned correctly, select View → Equipment and expand the required circuit pack. Click on the original port and Select to obtain the port parameters. Click Close.

If required, provision the original OC-3 port pair according to the office records using the Configuration → Equipment command.

Reference:

Procedure 4-4: Provision OLIU circuit packs/ports for service

To verify that the original OC-3 port DCC parameters are provisioned correctly, select View → DCC Terminations to obtain the DCC channel status. Click Close.

If required, provision the original OC-3 port DCC parameters according to the office records using the Configuration → DCC Terminations command.

Reference:

Procedure 6-4: Provision DCC terminations

Important!

All cross-connections at this node that are associated with the OC-12 UPSR must be identified so that traffic can be moved back to the original OC-3 UPSR.

Select View → Cross-Connections. Expand the required OC-12 OLIU circuit pack in slot 2 of the Function/Growth group that is currently connected to the UPSR. Click on the required OC-12 port and Select to obtain the current list of cross-connections. Identify and record all through, add, drop, and UPSR Dual Ring Interworking cross-connections. Click Close to exit.

Important!

A UPSR Dual Ring Interworking cross-connection consists of a 1-way add, a 1-way through, and a 1-way path protected drop cross-connection. To verify that a cross-connection leg is part of a UPSR Dual Ring Interworking cross-connection, click on the cross-connection leg in the list of cross-connections and click View Graphic.

For additional information about UPSR Dual Ring Interworking cross-connections, refer to Procedure 10-11: Establish dual ring interworking (DRI) connections.

Repeat Step 4 to obtain a current list of cross-connections for the original OC-3 port in slot 2 of the other Function/Growth group. Compare the original OC-3 port cross-connection list with the upgrade OC-12 port cross-connection list.

For each UPSR Dual Ring Interworking cross-connection identified in Step 4, select Configuration → Cross-Connections and use the Cross-Connection Wizard to delete the UPSR Dual Ring Interworking cross-connections. Then use the Cross-Connection Wizard to create the same UPSR Dual Ring Interworking cross-connections on the original OC-3 port pair in the other Function/Growth group.

Result:

Transmission hits (less than 60 ms) may occur. Alarms may be reported at other nodes in the ring.

Reference:

Procedure 10-11: Establish dual ring interworking (DRI) connections

Important!

Do not perform this step for a 1-way through cross-connection associated with a UPSR Dual Ring Interworking cross-connection.

For each through cross-connection identified in Step 4 that is not part of a UPSR Dual Ring Interworking cross-connection, select Configuration → Cross-Connections and use the Cross-Connection Wizard to create the same through cross-connections on the original OC-3 port pair in the other Function/Growth group.

Reference:

Procedure 10-5: Make VT1.5 or STS-n cross-connections, single OC-3/OC-12 UPSR configuration

NOTICE Service-disruption hazard

Removal of wrong fiber connections will result in a service interruption.

Ensure that you remove only the fiber connections for the optical span being upgraded.

Disconnect the transmit and receive optical fibers from the upgrade OC-12 port on the OC-12 OLIU circuit pack in slot 2 of the Function/Growth group.

Result:

The system reports an inc. OC12 LOS alarm for the OC-12 port.

If required at both ends of the optical span to be backed out, perform the following to connect the original OC-3 port on the OC-3 OLIU circuit pack in slot 2 of the other Function/Growth group and the required OC-3 circuit pack/port at the opposite end of the original OC-3 optical span:

1. Clean and connect the transmit optical fibers.

2. Measure the optical receive power of the receive fibers using an optical power meter. Select the appropriate LBO to attenuate the receive signal to the middle of the allowable optical receive power range. (Refer to the Alcatel-Lucent 1665 Data Multiplexer Extend (DMXtend) Applications and Planning Guide, 365-372-324 for the SONET optical specifications of the OC-3 circuit packs.)

3. Clean and connect the receive fibers.

Reference:

Procedure 14-4: Perform connection and verification of optical facility

Important!

Perform this step only if the Optical Synchronization Source is to be reprovisioned to the original OC-3 port on the OC-3 OLIU circuit pack in slot 2 of the Function/Growth group.

If required, select Configuration → Timing/Sync to reprovision the Optical Synchronization Source to the original OC-3 port on the OC-3 OLIU circuit pack in slot 2 of the Function/Growth group.

Reference:

Procedure 6-5: Network Element synchronization provisioning

Important!

Perform this step only if the opposite end of the original optical span is an OC-3 port in a Function/Growth group and the Optical Synchronization Source is to be reprovisioned to the original OC-3 port.

If required at the opposite end of the original optical span, select Configuration → Timing/Sync to reprovision the Optical Synchronization Source to the original OC-3 port on the OC-3 OLIU circuit pack in slot 1 of the Function/Growth group.

Reference:

Procedure 6-5: Network Element synchronization provisioning

Important!

Do not perform this step for a 1-way add cross-connection associated with a UPSR Dual Ring Interworking cross-connection.

For each add cross-connection identified in Step 4 that is not part of a UPSR Dual Ring Interworking cross-connection, select Configuration → Cross-Connections and use the Cross-Connection Wizard to bridge the add cross-connections to the original OC-3 port on the OC-3 OLIU circuit pack in slot 2 of the other Function/Growth group.

Reference:

Procedure 10-10: Bridge and roll cross-connections

Important!

Do not perform this step for a 1-way path protected drop cross-connection associated with a UPSR Dual Ring Interworking cross-connection.

For each drop cross-connection identified in Step 4 that is not part of a UPSR Dual Ring Interworking cross-connection, select Configuration → Cross-Connections and use the Cross-Connection Wizard to roll the drop cross-connections to the original OC-3 port on the OC-3 OLIU circuit pack in slot 2 of the other Function/Growth group.

Reference:

Procedure 10-10: Bridge and roll cross-connections

NOTICE Service-disruption hazard

Removal of wrong fiber connections will result in a service interruption.

Ensure that you remove only the fiber connections for the optical span being upgraded.

Important!

Do not reconnect the optical fibers until instructed to do so. The optical fibers are reconnected after the OC-12 circuit pack/port is backed out at each end of the optical span.

Disconnect the transmit and receive optical fibers from the upgrade OC-12 port on the OC-12 OLIU circuit pack in slot 1 of the Function/Growth group.

Result:

The system reports inc. LOS alarms for the upgrade OC-12 ports and the original OC-3 port on the OC-3 OLIU circuit pack in slot 1 of the Function/Growth group. Alarms may also be reported at other nodes in the ring.

Select Configuration → Update System → Update All.

Result:

A dialog box appears asking you to confirm executing this command. Click Yes.

The inc. LOS alarms clear.

Select Configuration → Cross-Connections and use the Cross-Connection Wizard to delete the remaining add and through cross-connections to the upgrade OC-12 ports.

The following figure shows the state of the current node and the adjacent optical spans.

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

End of steps