Replace pre Series 1:6 LNW27, 29, 76, 221–259 OC-48 OLIU in Main slot M1 of starting node

Procedure 12-19.1: Replace pre Series 1:6 LNW27, 29, 76, 221–259 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 pre series 1:6 LNW27, LNW29, LNW76, or LNW221–259 OC-48 OLIU circuit pack in Main slot M1 of the starting node with a Series 1:6 or later version of the same OC-48 OLIU circuit pack type.


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 12-19.2: Verify active/standby status of circuit pack to be replaced
2	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 pre Series 1:6 LNW27, 29, 76, or 221–259 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 a Series 1:6 or later version of the same OC-48 OLIU circuit pack type. Result: The Series 1:6 or later version OC-48 OLIU circuit pack in Main slot M1 is tested and autoprovisioned. The system reports an `inc. OC48 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
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 replacement OC-48 OLIU circuit pack in Main slot M1. Result: The `inc. OC48 LOS` alarms clear. Transmission is now supported on the optical span. Reference: Procedure 14-3: Clean optical fibers, dual LC adapters and LC lightguide buildouts (LBOs) STOP! To complete the upgrade, return to the procedure that directed you to perform this procedure. End of steps