![](/images/new-backgrounds/1202246/20224619x1.webp)
2. RuggedBackbone™ Modules
2.2. Control Module
The Control Module (CM) is the central processing unit of the RuggedBackbone™ chassis. The ROX™ operating system running on the CM controls and coordinates the functions of all modules installed in the system. The Control Module is installed in the CM slot of the chassis, as shown in Figure 2.1, “Chassis Slot Assignment”.
Figure 2.2. Control Module
The CM is equipped with an RS232 serial console port for initial management functions, and a locally connected
Other features of the CM include:
•Alarm Indicator LED, which indicates system alarm status.
•Removable 1GB Compact Flash (CF) card, which contains active and fallback installations of the ROX™ operating system, along with the configuration database and other system data.
•Critical Alarm Relay, activated by the operating system to indicate a critical alarm.
•Lamp Test / Alarm Cutoff button.
•Utility USB port (as yet unused).
Detailed information on connecting to the ports on the CM can be found in this guide as follows:
RuggedCom® RuggedBackbone™ | 10 | RX5000 Installation Guide Rev106 |