IBM Netfinity 3000, User Handbook Manual, Page: 305 / 370

Appendix A. Ethernet cable specifications
This appendix contains the specifications for the unshielded
twisted-pair (UTP) cables that can be used to connect the server to
an IEEE Standard 802.3 network.
The Ethernet controller on your system board provides 10BASE-T
and 100BASE-TX support through the RJ-45 connector on the back
of your server. When you connect your server to the network, the
Ethernet controller automatically detects the data-transfer rate
(10 Mbps or 100 Mbps) on the network and then sets the controller
to operate at the appropriate rate.
The following information describes the specifications for the
unshielded twisted-pair (UTP) cable that can be used to connect the
server to an IEEE Standard 802.3 network.
Attention:
To connect the server's 10BASE-T or 100BASE-TX port to a repeater,
use an UTP EIA/TIA-568 Category 5 cable that is terminated with
RJ-45 connectors. This is a requirement to meet various
governmental standards, including electromagnetic compatibility.
The cables used in 10BASE-T or 100BASE-TX link segments do not
require grounding. However, all devices connected to the cables
must be grounded.
Connect the appropriate type of UTP cable to the repeater.
Ÿ
If the port on the repeater is a crossover port (also called an
MDI-X port), use a UTP cable that is wired as a straight-through
cable.
Ÿ
If the port on the repeater is not a crossover port (also known as
an MDI port), use a UTP cable that is wired as a crossover
cable.
Your server contains two diagnostic light-emitting diodes (LEDs) on
the Ethernet connector that is located at the rear of the server.
Ÿ
When the green LED is on, it indicates that the Ethernet
controller is connected to a hub or switch and is receiving link
pulses. This LED is also known as the Link OK light.
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Copyright IBM Corp. 1999
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