
Chapter 3 Installing the Cisco XR 12406 Router
Installing a Router
Installing Center-Mounting  Brackets (optional)
To install the Cisco XR 12406 router in the 
The optional 
Refer to Figure 
Step 1 Measure and mark the hole at the same height on both the left and right posts.
Caution When installing the right side lower 
Step 2 Mount the lower right bracket:
a.Hold the lower right bracket against the right rack rail and align the bottom screw hole in the lower bracket with the marked screw hole.
b.Pick a bottom bracket hole that aligns with a hole in the rack rail, then insert a screw in the hole and finger tighten the screw.
c.Insert a second screw in the top hole in the bracket and finger tighten that screw.
Step 3 Repeat Step 2a through Step 2c to mount the lower left 
Step 4 Use a level to verify that the tops of the two brackets are level, or use a measuring tape to verify that both brackets are the same distance from the tops of both rack rails.
Step 5 Use a screwdriver to tighten all the screws.
Step 6 Repeat Step 1 through Step 5 for both upper 
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