Polycom DOC2238A manual Control Unit, Shows a block diagram of the Main Control Module

Chapter 4 - Hardware Description

Control Unit

The Main Control Unit performs the functions of conference setup, conference termination, and resource allocation in both the MGC+100 and the MGC+50. The Main Control Module has an Intel-based Pentium processor, a hard disk drive and 256 MB of memory. The Control Unit is located in slot A of the MGC+, and is the connected to the MCU’s backplane and Control Module rear I/O panel.

The front LED’s indicate the status if the module is in operation and functioning properly.

Figure 4-7 shows a block diagram of the Main Control Module.

Communications

Controller, C8M,

CCOM

Main

CPU

Serial

Interface

LAN

Interface

Hard

Disk

External Flash

Disk

CPU BUS

Figure 4-6: Block diagram of MCM

The MGC+ unit can contain different types of functional network cards. The Main Control Module operating system includes drivers for all of the cards. The Main Control Module’s operating system automatically detects the card type. If the card is correctly identified, the system starts up correctly. If the system fails to detect any card type, it will start up according to the card type definition in the system.cfg file.

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