Nortel Networks 400 4.0 Manuel D’Utilisation

Chapter 2 Introducing the BCM hardware

BCM200/400 4.0 Installation and Maintenance Guide

Figure 2   BCM200 main unit internal components

Table 2   BCM200 main unit internal component descriptions

Hard disk

The programmed hard disk (or field redundancy upgrade) provides an additional hard 
disk and redundant array of independent disks (RAID) controller card. See 

.

Power supply

The auto-sensing power supply (standard) provides power to the main unit (see 

).

Cooling fan

The system cooling fan forces warm air out of the main unit (see 

).

I/O card

The I/O interface card provides a signal junction between the base function tray, hard 
disk, power supply, and cooling system (see 

MBM backplane

The MBM backplane provides the MBM component interface to the power supply and 
main card (see 

). 

Removable cover

The removable cover provides access to internal components.

Power supply bay

Hard disk bay (removable panel)

Removable cover

Power supply

Hard disk

Fan

MBM backplane

I/O card

Fan exhaust

Rack-mount adapter 
anchor points

MBM backplane 
connectors