Technical data
Fan Trays 
Hardware Components Page 14 
Fan Trays 
The cooling system consists of three high performance fan trays. Each tray contains two fans that supply air 
volume and velocity for cooling front and rear chassis components. Air flows from the inside to the outside of 
the chassis. 
Item 
Description 
1 
Power fault LED 
2 
Locking captive screw 
Three fan trays are preinstalled (6 fans).  
Chassis Management Modules 
The Chassis Management Module controls and manages the chassis. Amongst other activities, the CMM 
controls fan speeds, monitors temperatures across the chassis, and the hot-swap insertion and extraction of 
components. 
Item 
Description 
1 
General LEDs 
2 
Telco Alarm LEDs 
3 
Application defined LEDs 
4 
Latch 










