Telephone System Installation and Maintenance Guide

Chapter 2 Introducing the BCM50 hardware 51
BCM50 Installation and Maintenance Guide
Hard disk
Each main unit contains a single hard disk and a hard disk bracket to install it in the main unit (see
Figure 18).
For installation and replacement instructions, refer to “Replacing an internal component” on page
189.
Figure 18 Hard disk and bracket
Cooling fan
The main units have a single cooling fan. The expansion unit has two cooling fans (see Figure 19).
Figure 19 Cooling fan
Hard disk
bracket
Hard disk
fan connector