Determine the current status of the upgrade at the node.

If required, verify the active/standby status of the OC-192 OLIU circuit pack in Main slot M2 and perform manual switches to switch traffic away from an active circuit pack.

Reference:

Procedure 12-9.3: Verify active/standby status of circuit pack to be replaced

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-192 OLIU circuit pack in Main slot M2. Disconnect the optical fibers from the OC-192 OLIU circuit pack in Main slot M2. Then replace the OC-192 OLIU circuit pack in Main slot M2 with the original OC-48 OLIU circuit pack.

Result:

The system reports an unexpected CP type alarm for Main slot M2.

The FAULT LED may light on the circuit packs in the Main slots, and the opposite end of the optical spans may report inc. OCN sig. degrade (BER) and section DCC channel failed alarms.

If the provisioned system timing mode is External, the system may also report an inc. DS1 sync. ref. OOL alarm.

Reference:

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

At both ends of the optical span to be backed out, perform the following to connect the original OC-48 OLIU circuit pack in Main slot M2 and the required OC-48 circuit pack/port at the opposite end of the original OC-48 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-48 circuit packs.)

3. Clean and connect the receive fibers.

Result:

At the opposite end of the original OC-48 optical span, the inc. OC48 LOS alarm clears.

Reference:

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

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 original OC-48 OLIU circuit pack in Main slot M2 is tested and autoprovisioned.

The system performs an automatic path protection switch, and all traffic is now active on Main slot M2. Transmission hits (less than 60 ms) occur as traffic switches from the circuit pack in Main slot M1 to the circuit pack in Main slot M2.

The unexpected CP type alarm for Main slot M2 clears, and the system reports an unexpected CP type alarm for Main slot M1. Alarms may also be reported at other nodes in the ring.

Transmission is now supported on the original optical span between Main slot M2 and the required OC-48 circuit pack/port at the opposite end of the original OC-48 optical span.

NOTICE Equipment damage hazard

If an OC-192 OLIU circuit pack is connected to an OC-48 OLIU circuit pack equipment damage may occur.

Do not reconnect the optical fibers until instructed to do so. The optical fibers are reconnected after the OC-192 OLIU circuit pack is backed out at each end of the optical span.

Open a faceplate latch on the OC-192 OLIU circuit pack in Main slot M1. Disconnect the optical fibers from the OC-192 OLIU circuit pack in Main slot M1. Then replace the OC-192 OLIU circuit pack in Main slot M1 with the original OC-48 OLIU circuit pack.

Result:

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

The unexpected CP type alarm for Main slot M1 clears, and the system reports an inc. OC48 LOS alarm for Main slot M1.

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.

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

End of steps