Procedure 12-8.2: Replace LNW26B, 28, 77, 121B-159B OC-48 OLIU in Main slot M1 of starting node
Important!
This is not a stand-alone procedure. Perform this procedure only as directed by another procedure.
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 replace the LNW26B, LNW28, LNW77, or LNW121B–159B OC-48 OLIU circuit pack in Main slot M1 of the starting node with the temporary replacement OC-48 OLIU circuit pack.
1 |
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 12-8.5: Verify active/standby status of circuit pack to be replaced | ||
2 |
Important! Acceptable temporary replacement OC-48 OLIU circuit packs include the LNWUPG, LNW27 (Series 1:6 and later), LNW29 (Series 1:6 and later), LNW32, LNW76 (Series 1:6 and later), LNW202, and/or LNW221–259 (Series 1:6 and later) OC-48 OLIU circuit packs. For more information, refer to Required equipment. 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 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 temporary replacement OC-48 OLIU circuit pack. Result: The system reports an unexpected CP type 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 | ||
3 |
Measure the optical receive power of the receive fiber 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 OLIU circuit packs.) | ||
4 |
Clean all fiber connectors, and connect the transmit and receive optical fibers to the temporary replacement OC-48 OLIU circuit pack in Main slot M1. Reference: Procedure 14-3: Clean optical fibers, dual LC adapters and LC lightguide buildouts (LBOs) | ||
5 |
If the OLIU circuit packs being upgraded carry Ethernet traffic with LCAS enabled, transmission hits (up to 6 seconds) may occur as Ethernet traffic is switched. The length of the service hits varies based on shelf equipage and TDM/Ethernet service provisioning. Important! The UPD/INIT button does not work during this upgrade. At the System View select Configuration → Update System → Upgrade. Select main-1 (default) as the Directed Slot Choice and click OK. Result: A dialog box appears asking you to confirm executing this command. Click Yes. The temporary replacement OC-48 OLIU circuit pack in Main slot M1 is tested and autoprovisioned. The system performs an automatic path protection switch, and all traffic is now active on Main slot M1. Transmission hits (less than 60 ms) will occur for each separate protection switch. The unexpected CP type alarm for Main slot M1 clears, and the system reports an unexpected CP type alarm for Main slot M2. Alarms may also be reported at other nodes in the ring. STOP! To complete the upgrade, return to the procedure that directed you to perform this procedure. End of steps |
