Cisco 1721 - Manual (Page 76)

Appendix C Installing and Upgrading Memory and Virtual Private Network Modules
Installing a VPN Module
C-8
Cisco 1721 Router Hardware Installation Guide
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Step 4 Turn the motherboard over, and attach the standoffs to it by using the screws
provided, as shown in
Figure C-7 .
Figure C-7 Securing the Standoff to the Router Motherboard
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Standoff screws
Bottom of the board