3com 10005622 Manuel D’Utilisation

To mount the system into a distribution rack:

Carefully lift the system into place and align the 
appropriate holes in the mounting brackets with the 
designated holes in the distribution rack. See 
Figure 2-5.

Figure 2-5   Aligning Bracket and Distribution Rack Holes

Have another person hold the system in place. Insert 
the four suitable mounting screws (not provided) into 
the designated mounting holes on the bracket. 
Repeat for the other side.

Verify that the system is level.

Tighten the mounting screws. The system is now 
installed in the distribution rack. 

Figure 2-6 shows two Switch 3900 systems installed 
in a distribution rack. 

Figure 2-6   Two Systems Installed in a Rack

You are now ready to cable the system. For cabling 
instructions, see Chapter 3.

Switch 3900
(Position 2)

Switch 3900
(Position 1)

Hole
#1

Hole
#3

Hole
#6

Hole
#8

3U
(5.25")