Procedure 6-9: Replace LNW80 switch circuit pack
Overview
Use this procedure to replace an LNW80 Switch circuit packs in Main slots M1 and M2.
The LNW80 Switch circuit pack has no optics and is used in headless main applications to allow full use of the VT1.5 switch fabric for VT1.5-type hairpin cross-connections. The LNW80 circuit pack supports equipment-related alarms.
The LNW80 Switch circuit pack requires no provisioning and does not support loopbacks, test access, performance monitoring, DCC functionality, incoming signal alarms, line timing, DS1 synchronization outputs, and upgrades. The LNW80 Switch circuit pack can not be a cross-connection source or destination.
Important!
If both the original OLIU circuit pack and the replacement OLIU circuit pack fail when no other transmission circuit packs are installed in the shelf, replace the SYSCTL circuit pack. Refer to Procedure 6-10: Upgrade or replace SYSCTL (LNW2) circuit pack.
Before you begin
Prior to performing this procedure:
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Refer to Before you begin and Required equipment in this chapter.
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Refer to Electrostatic discharge in Chapter 1, Safety.
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Ensure that the correct circuit pack is available for replacement.
Steps
Complete the following steps to replace an LNW80 Switch circuit packs in Main slots M1 and M2.
1 |
Remove the circuit pack by grasping the inner edge of the locking-levers, and applying a constant pressure, pull the levers forward and remove the circuit pack. |
2 |
Seat the replacement circuit pack in the vacated M1 or M2 slot. Result: The FAULT LED and ACTIVE LED lights. The FAULT LED flashes after about 20 seconds and then goes off. MJ or MN and NE alarm LEDs on the SYSCTL circuit pack light when the circuit pack is installed. |
3 |
From the System View menu, click the Alarm List button to obtain an NE Alarm List. Verify that no alarms are present for the installed circuit pack. If required, refer to the appropriate procedure to clear any alarms. |
4 |
From the System View menu, select View → Equipment and verify that the new circuit pack is recognized by the SYSCTL. End of steps |