NIU/TCM Removal

To remove an NIU/TCU:

1. Ensure that the Acme Packet 6300/6350 on which the NIU/TCU is being replaced is in standby mode by following the steps described elsewhere in this document.
2. Unplug the power cords to power down the chassis.
3. Unplug all network and management cables (NIU only) you plan to remove from the Acme Packet 6300/6350.
4. Using a #2 Phillips screwdriver, unscrew the two captive thumbscrews located on each side of the NIU/TCU. The screws are spring-loaded and will push forward, but they will not fall out of the NIU/TCU.

   Figure 6-3 Loosening Captive Thumbscrews (NIU Shown)

   
5. Slide the lever catch and pivot the two ejection levers outward at the same time, pulling the card out of its connection to the motherboard and away from the system chassis. This action disengages the NIU/TCU from the system, severing all electrical contact to the processing unit.
6. Remove the loosened NIU/TCU out of the Acme Packet 6300/6350 by holding and pulling on each ejection lever.
7. Place the NIU/TCU in an antistatic bag while it remains outside of the Acme Packet 6300/6350.