Cisco Systems Cisco 12816 Manuale Utente

To help maintain trouble-free operation, adhere to the following precautions when 
planning your rack installation:

Ensure the site of the rack includes provisions for source AC or DC power, 
grounding, and network interface cables.

Allow sufficient space to work around the rack during the installation. You 
need:

At least 3 feet adjacent to the rack to move, align, and insert the chassis.

At least 2 feet in front of the power shelf to insert power entry modules.

Maintain at least 24 inches (61 cm) of clearance in front of and behind the 
chassis for maintenance after installation.

To mount the router between two posts or rails, the usable aperture (the width 
between the inner edges of the two mounting flanges) must be at least 
17.7 inches (45.0 cm).

When fully populated with cards, the router can weigh as much as 440 lb 
(200 kg). Mount the router so that the bottom of the router chassis is no higher 
than 10 inches (25.4 cm) from the floor to keep the center of gravity of the 
rack as low as possible. To maintain equipment rack stability and to ensure 
your safety, make sure you install any stabilizing devices provided before you 
install the router.

If you use a telco-style rack, the weight of the chassis is cantilevered off of 
the two rack posts. Make sure that:

The weight of the router does not make the frame unstable.

The frame is bolted to the floor and is secured to the building structure 
using either wall brackets or overhead brackets.

When mounting the router in a telco-type rack or 4-post rack, be sure to use 
all of the screws provided to secure the chassis to the rack posts.

For the enhanced models of the Cisco 12016 series routers, the mounting rails 
on a 4-post rack must be recessed no more than 1.5 inches for the front door 
to fully open and close and to provide adequate room for cable routing.