3Com CoreBuilder 9000 Quick Installation Manual page 19

Switch Setup Tasks
Match the slots on the rack-mount flange to each screw hole position
on the side of the chassis.
3 Secure the rack-mount flange to the chassis with the screws provided
(10-32 screws).
a Install the top screw on the rack-mount flange.
b Install the remaining screws.
c Tighten all screws completely.
4 Repeat steps 2 and 3 to secure the other flange on the opposite side of
the chassis.
Tighten the #10 screws holding the chassis onto the rail to a Torque
Specification of 22-25 in/lb (inches per pound).
To get your CoreBuilder 9000 Enterprise Switch 7-slot chassis and its
components installed and configured so that you can connect it to your
network, follow the setup tasks shown in Figure 13. If you need more
details about each setup task, see the indicated CoreBuilder 9000
documents.
7-Slot Chassis Quick Installation Guide 19