Dell OptiPlex G1 Service Manual page 15

be attached from the adapter card's CD-ROM audio input and CD-ROM audio
output connections to the AMC connector. See the AMC-compliant adapter
card's documentation for more information.
The OptiPlex G1 systems provide chassis intrusion detection. If the computer
cover is removed, the Chassis Intrusion setting in the System Setup program
changes from Not Detected to Detected and the following message is dis-
played during the boot routine at system start-up:
To clear this field and allow future intrusions to be detected, make sure that
the computer cover is closed, and then enter the System Setup program dur-
ing the system's POST, as described in Appendix A, "System Setup Program."
Use the left- or right-arrow key to select Reset for the Chassis Intrusion cate-
gory. This action changes the setting to its default, Not Detected.
NOTE: If a setup password has been assigned by someone else, contact your
network administrator for information on resetting the chassis intrusion
detector.
The OptiPlex G1 systems are available with or without integrated Ethernet NIC
subsystem.
The integrated 10/100-Mbps 3Com
supports the Wakeup On LAN feature and the 10BASE-T and 100BASE-TX
standards. The NIC subsystem connects to the Ethernet network through a
single RJ45 connector on the back of the computer. The RJ45 connector and
the NIC interface circuitry are mounted on the system board.
The NIC connector on the computer's back panel has the following indicators:
A yellow activity indicator flashes when the system is transmitting or
receiving network data. (A high volume of network traffic may make this
indicator appear to be in a steady "on" state.)
A green link integrity indicator lights up when there is a good connection
between the network and the NIC. When the green indicator is off, the sys-
tem is not detecting a physical connection to the network.
The computer's NIC connector (RJ45) is designed for attaching to a UTP Ether-
net cable. The other end of the cable connects to an RJ45 jack wall plate or to
an RJ45 port on a UTP concentrator or hub, depending on the network
configuration.
®
PCI 3C905B-TX Ethernet NIC subsystem
System Overview 1-5