System Locations
The system consists of a minimum of two drawers in one rack: the CEC drawer and the primary I/O
drawer. These two components are connected by cables that transmit data and control signals. Additional
I/O drawers can be added if further expansion of the system is required. The following figure shows the
system units.
R
R
R
CEC Drawer
(8 EIA Units)
CEC Drawer
(8 EIA Units)
Primary
I/O Drawer
(5 EIA Units)
Primary
I/O Drawer
(5 EIA Units)
Secondary
I/O Drawer
(Optional)
(5 EIA Units)
System unit with
Two I/O Drawers
System unit with
One I/O Drawer
Note: For information about installing rack rails, see Appendix G, “Rack Drawer Rail Instructions,” on page
535.
Chapter 1. Reference Information 9