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14 About Your System
Connecting External Devices
When connecting external devices to your system, follow these guidelines:
• Most devices must be connected to a specific connector and device drivers must be installed before the
device operates properly. (Device drivers are normally included with your operating system software or
with the device itself.) See the documentation that accompanied the device for specific installation
and configuration instructions.
• Always attach an external device while your system and the device are turned off. Next, turn on any
external devices before turning on the system (unless the documentation for the device specifies
otherwise).
See "Using the System Setup Program" on page 29 for information about enabling, disabling, and
configuring I/O ports and connectors.
NIC Indicator Codes
The NIC on the back panel has an indicator that provides information on network activity and link
status. See Figure 1-3. Table 1-3 lists the NIC indicator codes.
Figure 1-3. NIC Indicators
1 link indicator 2 activity indicator
Table 1-3. NIC Indicator Codes
Indicator Type Indicator Code Description
Activity Off When off at the same time that the link indicator is off,
the NIC is not connected to the network or the NIC is
disabled in the System Setup program. See
"Using the
System Setup Program
" on page 29.
Blinking yellow Indicates that network data is being sent or received.
Link Off When off at the same time that the activity indicator is
off, the NIC is not connected to the network or the NIC is
disabled in the System Setup program. See
"Using the
System Setup Program
" on page 29.
On (green) Indicates active link.
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