The figure below shows how to install the Cisco ASR 902 Router in a 300-mm ETSI Cabinet.
Figure 35: Installing the Chassis in a 300-mm ETSI Cabinet
Step 3
Install the 8 or 12 (4 or 6 per side) 12-24 x 3/4-inch or 10-32 x 3/4-inch screws through the holes in the bracket and into
the threaded holes in the equipment rack posts.
Step 4
Use a tape measure and level to verify that the chassis is installed straight and level.
Installing the Router Chassis in the Air Plenum
Ensure that the router is not installed in the Air Plenum while mounting it on the rack.
Note
Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide
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Installing the Cisco ASR 902 Router
Installing the Router Chassis in the Air Plenum