Dell Precision 400 Service Manual (.pdf) - Page 21

NIC, USB, Floor Stand, Thermal Protection, Using the Network Interface Controller

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NIC Dell WorkStation 400 systems contain an integrated 10/100-Mbps 3Com PCI 3C905TX NIC. The NIC subsystem connects to the Ethernet network through a single RJ45 connector on the back panel of the computer. The 10/100-Mbps NIC supports a 10-Mbps direct connection to either a Category 3 or a Category 5 Ethernet cable. When the NIC operates in the 100-Mbps mode, a Category 5 Ethernet cable must be used. Chapter 5, "Using the Network Interface Controller," in the User's Guide provides instructions for connecting the computer to, and configuring it for use on, an Ethernet network. USB USB capability simplifies connection of peripheral devices such as mice, printers, and computer speakers. The USB connectors on the computer's back panel provide a single connection point for multiple USB-compliant devices. USBcompliant devices can be connected and disconnected while the computer is running. Floor Stand The midsize computer can be used in a horizontal or vertical orientation when using an available floor stand. The floor stand is attached to the left side of the midsize computer. The floor stand is permanently attached to the bottom of the mini tower computer. Thermal Protection The microprocessor fan is self-monitoring. If the fan stops, a system alarm triggers a system management interrupt (SMI), which alerts the BIOS. If the Dell ThermalShutdown Service is installed, the power indicator flashes and a message appears on the monitor to alert the user that the system will shut down in an orderly manner, preventing the loss of data. If the service is unable to shut down the system within approximately 3 minutes, the BIOS powers down the computer. If the ThermalShutdown Service is not installed, the computer turns off immediately. System Overview 1-9

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System Overview
1-9
NIC
Dell WorkStation 400 systems contain an integrated 10/100-Mbps 3Com PCI
3C905TX NIC. The NIC subsystem connects to the Ethernet network through a
single RJ45 connector on the back panel of the computer.
The 10/100-Mbps NIC supports a 10-Mbps direct connection to either a
Category 3 or a Category 5 Ethernet cable. When the NIC operates in the
100-Mbps mode, a Category 5 Ethernet cable must be used.
Chapter 5, “Using the Network Interface Controller,” in the
User’s Guide
pro-
vides instructions for connecting the computer to, and configuring it for use on,
an Ethernet network.
USB
USB capability simplifies connection of peripheral devices such as mice, print-
ers, and computer speakers. The USB connectors on the computer’s back panel
provide a single connection point for multiple USB-compliant devices. USB-
compliant devices can be connected and disconnected while the computer is
running.
Floor Stand
The midsize computer can be used in a horizontal or vertical orientation when
using an available floor stand. The floor stand is attached to the left side of the
midsize computer. The floor stand is permanently attached to the bottom of the
mini tower computer.
Thermal Protection
The microprocessor fan is self-monitoring. If the fan stops, a system alarm trig-
gers a system management interrupt (SMI), which alerts the BIOS. If the Dell
ThermalShutdown Service is installed, the power indicator flashes and a mes-
sage appears on the monitor to alert the user that the system will shut down in
an orderly manner, preventing the loss of data. If the service is unable to shut
down the system within approximately 3 minutes, the BIOS powers down the
computer. If the ThermalShutdown Service is not installed, the computer turns
off immediately.