Cisco ASR 903 Installing Manual page 6

Installing the Router Chassis in the Rack
Note During vertical installation of the router, ensure that the equipment is mounted only on concrete or other
non-combustible surfaces.
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.
Cisco ASR 903 and ASR 903U Aggregation Services Router Hardware Installation Guide
6
Installing the Cisco ASR 903 Router