3Com CoreBuilder 7000 Installation & Start?Up Manual page 27

Universal mounting
hole pattern
Figure 2 Universal Mounting Hole Pattern
4 From the top of the universal mounting hole pattern, insert "G" clips in
the holes designated for the unit model.
5 Repeat steps 3 and 4 for the right rail. Ensure that you start on the same
hole space.
You are now ready to mount the CoreBuilder 7000 family ATM switch
into the distribution rack.
Distribution Rack Installation
Top of a universal mounting
hole pattern
1/2-inch spacing
5/8-inch spacing
5/8-inch spacing
1/2-inch spacing
27