3Com 3CB9E7 - CoreBuilder 9000 Chassis Switch Getting Started Manual page 105

Figure 52 shows two types of racks that you may use
to install the 7-slot chassis, 8-slot chassis, or 16-slot
chassis.
Figure 52 Rack Types
If you install more than one chassis in a rack, install
the bottom chassis first. Make certain that there is
sufficient space between the bottom chassis and
the top chassis.
If you install the chassis in a Metric rack slot, install
the rack-mount clips and screws in the closed slots
of the rack-mount flanges. If you install the chassis
in Telco rack slots, position the chassis and then
install the screws and rack-mount clips in the open
slots.
Preinstallation Information
Figure 53 shows the Telco and Metric slots and the
location of the preinstalled rack-mount flange on a
7-slot chassis.
Figure 53 Preinstalled Rack-mount Flange Location and Slot
Types on the CoreBuilder 9000 7-slot Chassis
Preinstalled
flange pin
Telco rack
open slot
Metric rack
closed slot
If you want to use the optional cable management
device on a 7-slot chassis, install it on the right side
of the chassis, as you look at it from the front.
Install the chassis in the rack before you install a
cable management device. For detailed
information about installing a cable management
device, see the 7-Slot Chassis Quick Installation
Guide for the CoreBuilder 9000 Enterprise Switch.
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