Procedure 12-6.2: Back out high-speed UPSR upgrade at node equipped with compatible OC-48 OLIU in Main slot M1

Important!

This is not a stand-alone procedure. Perform this procedure only as directed by another procedure.

Steps

Important!

Compatible OC-48 OLIU circuit packs include the LNW26B, LNW28, LNW77, and LNW121B–159B OC-48 OLIU circuit packs.

When optical fibers are disconnected during this procedure, inc. LOS, section DCC channel failed, and neighbor SYSCTL CP unavailable alarms are reported. The holdover mode active condition may also be reported depending on the provisioned system timing mode.

Complete the following steps to back out an OC-12 UPSR to OC-48 UPSR upgrade at a Alcatel-Lucent 1665 DMX node equipped with a compatible OC-48 OLIU circuit pack in the Main slot M1.

 
1

Determine the current status of the upgrade at the node.

If...

Then...

both Main slots have been upgraded with OC-48 OLIU circuit packs,

Continue with Step 2.

only Main slot M1 has been upgraded with an OC-48 OLIU circuit pack,

Proceed to Step 6.


2

If required, verify the active/standby status of the OC-48 OLIU circuit pack in Main slot M2 and perform manual switches to switch traffic away from an active circuit pack.

Reference:

Procedure 12-6.5: Verify active/standby status of circuit pack/port to be backed out


3

Important!

If the circuit pack is active for timing and/or transmission, opening the latch causes timing and/or transmission switches. Transmission hits (less than 60 ms) will occur for each separate protection switch.

Open the lower faceplate latch on the OC-48 OLIU circuit pack in Main slot M2. Disconnect the optical fibers from the OC-48 OLIU circuit pack in Main slot M2. Then replace the OC-48 OLIU circuit pack in Main slot M2 with the original OC-12 OLIU circuit pack.

Result:

The original OC-12 OLIU circuit pack in Main slot M2 is tested and autoprovisioned.

The system reports an unexpected circuit pack type condition and an inc. OC48 LOS alarm for Main slot M2.

Reference:

Procedure 4-2: Install OLIU circuit packs in Main slots


4

If required at both ends of the optical span to be backed out, perform the following to connect the original OC-12 circuit pack in Main slot M2 and the required OC-12 circuit pack/port at the opposite end of the original OC-12 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 (DMX) Applications and Planning Guide, 365-372-300 for the SONET optical specifications of the OC-12 circuit packs.)

  3. Clean and connect the receive fibers.

Result:

The inc. OC48 LOS alarms clear. Transmission is now supported on the original OC-12 optical span.

Reference:

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


5

Important!

Perform this step only if the opposite end of the original optical span is an OC-12 port in a Function/Growth group and the Optical Synchronization Source is to be reprovisioned to the original OC-12 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-12 port on the OC-12 OLIU circuit pack in slot 1 of the Function/Growth group.

Reference:

Procedure 6-5: Network Element synchronization provisioning


6

Important!

The UPD/INIT button does not work during this upgrade.

At the System View select Configuration → Update System → Upgrade. Select main-2 as the Directed Slot Choice and click OK.

Result:

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

The unexpected circuit pack type condition for Main slot M2 clears, and the system reports an unexpected circuit pack type condition for Main slot M1.


7

If required, verify the active/standby status of the OC-48 OLIU circuit pack in Main slot M1 and perform manual switches to switch traffic away from an active circuit pack.

Reference:

Procedure 12-6.5: Verify active/standby status of circuit pack/port to be backed out


8

Important!

If the circuit pack is active for timing and/or transmission, opening the latch causes timing and/or transmission switches. Transmission hits (less than 60 ms) will occur for each separate protection switch.

Do not reconnect the optical fibers until instructed to do so. The optical fibers are reconnected after the OC-48 circuit pack/port is backed out at each end of the optical span.

Open the lower faceplate latch on the OC-48 OLIU circuit pack in Main slot M1. Disconnect the optical fibers from the OC-48 OLIU circuit pack in Main slot M1. Then replace the OC-48 OLIU circuit pack in Main slot M1 with the original OC-12 OLIU circuit pack.

Result:

The original OC-12 OLIU circuit pack in Main slot M1 is tested and autoprovisioned.

The unexpected circuit pack type condition for Main slot M1 clears, and the system reports an inc. OC12 LOS alarm for Main slot M1. Alarms may also be reported at other nodes in the ring.

Reference:

Procedure 4-2: Install OLIU circuit packs in Main slots

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

View the figure

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


End of steps

November 2011Copyright © 2011 Alcatel-Lucent. All rights reserved.