The following figure illustrates the wiring in crossover cables.
Twisted
Pair
1
2
3
6
4, 5, 7, 8
RJ-45 Modular Connector
Pin
1
1
2
2
3, 4
10BASE-T / 100BASE-TX
1
2
3
6
4, 5, 7, 8
Pin
TD+
TD
RD+
RD
RJ-45 Modular Connector
(Not used)
TD+
TD
RD+
RD
(Not used)
Signal
Name
Signal
Name
Relative to the device connected to the adapter
Note:
For additional information about Ethernet protocols, refer to your Ethernet
documentation.
Diagnostic LEDs
Green:
Indicates the adapter is connected to a hub or switch and is receiving link
pulses. If the LNK light isn't on, check all connections at the adapter and the hub.
Make sure the hub is transmitting at the correct speed and the drivers are loaded.
Also, make sure you have the correct wiring configuration for the adapter to the
hub connection. Some hubs require a crossover cable rather than a straight-through
cable.
Note that this LED will be on when running the diagnostics loopback test without a
cable attached to the adapter.
Yellow:
Indicates 100 Mbps when on, and 10 Mbps when off.
Note that this LED may stay on if link is broken during activity.
Error messages
Note:
The error messages shown in this section are available only with the
integrated Ethernet controller. These error messages are not available when
remote program load (RPL) or dynamic host configuration protocol (DHCP)
is used through optional network adapters.
If a failure condition occurs after the Ethernet controller is initialized, an error
message appears on the screen. The error messages that can occur are shown in the
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Using Your Personal Computer
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