Cisco Cisco 4402 Wireless LAN Controller Installation Guide

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Installing the VPN Termination 
Module
To install a VPN termination module into the rear panel of a 
wireless LAN controller, follow these steps:
Step 1
Remove all power from the wireless LAN controller 
(Figure 1).
a.
Turn power off.
b.
Open the latch.
c.
Pull the power cord.
Caution
The wireless LAN controller can have two power 
modules, in which case you should remove both 
power cords.
Figure 1
Removing Power
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A
B