30
PRO SWITCHING SYSTEM
4. Components
This chapter describes the Pro Switching System components and component
functions, and provides model numbers.

4.1 Rackmount Chassis

The Rackmount Chassis (SM700A)has 16 slots for front cards, 16 slots for rear
cards, one slot (the rightmost slot) for the control card, and two slots for power
supplies.
The Rackmount Chassis must include a control card and at least one power
supply (115/230 VAC)to operate properly. If you want power redundancy
(backup), the rack must include two power supplies.

Figure 4-1. Rackmount Chassis Front Ports.

4.1.1 C
ONTROLS
• Key Switch: A key switch on the front of the rack enables or disables manual
operation. This prevents accidental switching from the front of the rack.
To enable manual operation, turn the key to the horizontal (unlocked)
position (represented by the icon of the open padlock on the control card).
See Figure 4-2.
To disable manual operation, turn the key to the vertical (locked) position
(represented by the icon of the closed padlock on the control card).