Change circuit pack mode of LNW26B, LNW28, LNW77, or LNW121B

Procedure 4-22: Change circuit pack mode of LNW26B, LNW28, LNW77, or LNW121B–159B OC-48 OLIU circuit packs

Overview

Use this procedure to change the Circuit Pack Mode of the LNW26B, LNW28, LNW77, or LNW121B–159B OC-48 OLIU circuit packs installed in the Main slots.

Important!

This procedure supports changing the Circuit Pack Mode parameter from Normal to Enhanced only. Changing the Circuit Pack Mode parameter from Enhanced to Normal is not supported.

Normal/Enhanced jumper

The LNW26B, LNW28, LNW77, or LNW121B–159B OC-48 OLIU circuit packs are equipped with a Normal/Enhanced jumper used to provision the Circuit Pack Mode parameter. (The Circuit Pack Mode parameter is not CIT provisionable.) If the Normal/Enhanced jumper is in the Normal position, the circuit pack can cross-connect VT1.5 signals in up to any 6 STS-1 signals. If the Normal/Enhanced jumper is in the Enhanced position, the circuit pack can cross-connect VT1.5 signals in up to any 12 STS-1 signals.

Refer to the following figure for the location of the Normal/Enhanced jumper and the jumper settings.

Privilege level

You must log in as a Privileged or General user to complete this procedure.

NOTICE

Equipment damage hazard

Rocking circuit packs back and forth when removing or installing them can damage circuit pack and/or shelf connectors.

Do not rock circuit packs back and forth when removing or installing them. Carefully slide circuit packs into or out of the shelf slot.

Before you begin

Prior to performing this procedure:

Refer to Required equipment and Before you begin in this chapter.
Obtain the work instructions for this procedure.
Verify that the work instructions specify the high-speed network configuration (for example, UPSR or BLSR).

Steps

Important!

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 change the Circuit Pack Mode of the LNW26B, LNW28, LNW77, or LNW121B–159B OC-48 OLIU circuit packs installed in the Main slots.

Click the Alarm List button in the top right corner of the System View or select Fault → NE Alarm List to view the NE Alarm List and verify that no alarms are present.

Refer to the appropriate trouble clearing procedures to clear all existing alarms before continuing with this procedure.

Reference:

Alcatel-Lucent 1665 Data Multiplexer (DMX) Alarm Messages and Trouble Clearing Guide, 365-372-302

To verify that no loopbacks, protection switch lockouts, or protection switches are present, select View → Rolling Events. Under the line reading RTRV-COND-ALL determine if any loopbacks, protection switch lockouts, or protection switches are displayed.

Remove all existing loopbacks, protection switch lockouts, or protection switches before continuing with this procedure.

Reference:

Alcatel-Lucent 1665 Data Multiplexer (DMX) Alarm Messages and Trouble Clearing Guide, 365-372-302

Select Fault → Analysis → Test Access to access the Test Access Wizard and verify that no test access sessions exist.

Select Fault → Analysis → Test Access to access the Test Access Wizard and delete all existing test access sessions.

Reference:

Important!

Local operating procedures for removing a circuit pack may vary. One method is to disconnect the optical fibers and remove the circuit pack. Another method is to verify the circuit pack active/standby status, perform manual switches if the circuit pack is active, and then disconnect the optical fibers and remove the circuit pack.

Determine the local operating procedures for removing a circuit pack before removing the OC-48 OLIU circuit pack in Main slot M1.

If the local operating procedures specify…	Then...
disconnect the optical fibers and remove the circuit pack,	Proceed to Step 11.
verify the circuit pack active/standby status, perform manual switches if the circuit pack is active, and then disconnect the optical fibers and remove the circuit pack,	Continue with Step 5.

Important!

This step is optional. If the OC-48 OLIU circuit pack in Main slot M1 is the active circuit pack for timing and the circuit pack is removed, the system performs an automatic protection switch and subsequent transmission hits (less than 60 ms) will occur. If desired, perform this step to determine the timing state of the OC-48 OLIU circuit pack in Main slot M1.

Select View → Timing/Sync. Observe the value of the Active Circuit Pack parameter to determine the active circuit pack for timing. Click Close.

Important!

This step is optional. If the OC-48 OLIU circuit pack in Main slot M1 is the active circuit pack for timing, an optional manual timing switch can be performed before removing the circuit pack in Main slot M1. Transmission hits (less than 60 ms) will occur for each separate protection switch.

If the OC-48 OLIU circuit pack in Main slot M2 is the active circuit pack for timing, do not perform this step.

To perform an optional manual timing switch, select Fault → Timing/Sync Protection Switch → Main Circuit Pack Timing Switch. Select the Manual Switch Command and click OK.

Result:

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

If required, repeat Step 5 to verify that the OC-48 OLIU circuit pack in Main slot M2 is now the active circuit pack for timing.

Important!

This step is optional. If the OC-48 OLIU circuit pack in Main slot M1 is the active circuit pack for transmission and the circuit pack is removed, the system performs an automatic protection switch and subsequent transmission hits (less than 60 ms) will occur. If desired, perform this step to determine the transmission state of the OC-48 OLIU circuit pack in Main slot M1.

If ...	Then...
UPSR,	Select Reports → Path Protection List and observe the value of the Current Role parameter for the m1-()-() paths supported by the circuit pack in Main slot M1 (Ring 1). Record the active paths supported by the circuit pack in Main slot M1 (Ring 1). Click Close.
BLSR or 1+1,	Select Reports → Status Lists → Pack. Click Shelf and Select. Observe the value of the Switch State parameter for the main-1 circuit pack. If the Switch State parameter is ACTIVE, some Function units are receiving traffic from the main-1 circuit pack. Click Close.

Important!

This step is optional. If the OC-48 OLIU circuit pack in Main slot M1 is an active circuit pack for transmission, optional manual switches can be performed before removing the circuit pack in Main slot M1. In UPSRs, each path supported by the circuit pack in Main slot M1 must be switched separately. Transmission hits (less than 60 ms) will occur for each separate protection switch.

If the OC-48 OLIU circuit pack in Main slot M1 is not the active circuit pack for transmission, proceed to Step 10.

If...

Then to perform an optional manual transmission switch...

UPSR,

Select Fault → Protection Switch. Expand Path Protection, click on the required m-1-() path and Select. Select the Manual Switch Type and click Apply.

Result:

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

The system reports a manual switch condition for the affected path.

Repeat for each path supported by the circuit pack in Main slot M1. Click Close.

BLSR,

Select Fault → Protection Switch. Click on 2F BLSR main-1-1 and Select. Select the West Direction and Manual to Protection, Ring Switch Type, and click Apply.

Result:

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

The ABN LED is lit on the SYSCTL circuit pack faceplate and the Alarm List shows the Protection Switch, OC48 Port, Manual Switch, MSR, 2F condition (Not Alarmed).

1+1,

Select Fault → Protection Switch. Click on 1+1 Line main-1-1 and Select. Select the Manual Switch Type and click Apply.

Result:

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

The system reports a manual switch condition for the affected OC-n line.

If required, repeat Step 8 to verify that the OC-48 OLIU circuit pack in Main slot M2 is now the active circuit pack for transmission.

Important!

The Circuit Pack mode of the OC-48 OLIU circuit pack in Main slot M1 must be changed first.

Open the lower faceplate latch on the OC-48 OLIU circuit pack in Main slot M1. If the circuit pack is active for timing and/or transmission, opening the latch causes timing and/or transmission switches. Disconnect the optical fibers from the OC-48 OLIU circuit pack in Main slot M1 and remove the circuit pack from the slot.

Result:

Transmission hits (less than 60 ms) may occur if active traffic exists on the circuit pack in Main slot M1. If active through traffic exists on the circuit pack in Main slot M1, transmission hits (less than 60 ms) may occur at the nodes where the traffic is added/dropped (UPSRs/BLSRs only).

Important!

When the Normal/Enhanced jumper is placed in the Normal position, the circuit pack can cross-connect VT1.5 signals in up to any 6 STS-1 signals. When the Normal/Enhanced jumper is placed in the Enhanced position, the circuit pack can cross-connect VT1.5 signals in up to any 12 STS-1 signals.

Change the Normal/Enhanced jumper on the OC-48 OLIU circuit pack to the Enhanced position. Refer to Normal/Enhanced jumper for the location of the Normal/Enhanced jumper and the jumper settings.

Install the OC-48 OLIU circuit pack in Main slot M1, clean all fiber connectors, and connect the transmit and receive optical fibers.

Result:

The system reports an unexpected CP type alarm for Main slot M1.

Reference:

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

Important!

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

At the System View select Configuration → Update System → Update All.

Result:

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

The OC-48 OLIU circuit pack in Main slot M1 is tested and autoprovisioned.

The system performs automatic protection switches. Transmission hits (less than 60 ms) occur as active traffic is automatically switched from the circuit pack in Main slot M2 to the circuit pack in Main slot M1. All traffic is now active on the circuit pack in Main slot M1.

The unexpected CP type alarm for Main slot M1 clears, and the system reports an unexpected CP type alarm for Main slot M2.

Open the lower faceplate latch on the OC-48 OLIU circuit pack in Main slot M2. If the circuit pack is active for timing and/or transmission, opening the latch causes timing and/or transmission switches. Disconnect the optical fibers from the OC-48 OLIU circuit pack in Main slot M2 and remove the circuit pack from the slot.

Result:

Transmission hits (less than 60 ms) may occur if active traffic exists on the circuit pack in Main slot M2. If active through traffic exists on the circuit pack in Main slot M2, transmission hits (less than 60 ms) may occur at the nodes where the traffic is added/dropped (UPSRs/BLSRs only).

Important!

Change the Normal/Enhanced jumper on the OC-48 OLIU circuit pack to the Enhanced position. Refer to Normal/Enhanced jumper for the location of the Normal/Enhanced jumper and the jumper settings.

Install the OC-48 OLIU circuit pack in Main slot M2, clean all fiber connectors, and connect the transmit and receive optical fibers.

Result:

All alarms clear and service is restored.

Reference:

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

End of steps