IBM 866251Y - Netfinity 5500 M20, Руководство по техническому обслуживанию аппаратной части

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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 the Ethernet documentation.
Ethernet connection problems
Note
1. If you use the integrated Ethernet controller, you
must use Category 5 cabling. See “Ethernet
cable specifications” on page 36 for additional
information about Ethernet cable requirements.
2. If you directly connect two workstations (without a
hub), or if you are not using a hub with X ports,
use a crossover cable. To determine whether a
hub has an X port, check the port label. If the
label contains an
X, the hub has an X port.
If the ethernet adapter cannot connect to the network, do
the following.
1. Verify that the cable is installed correctly.
2. Check the Ethernet activity light on the front of the
server.
Note
This light is off when you run the diagnostic
programs in the Configuration/Setup Utility
program.
If the Ethernet activity light is off:
a. Make sure that the hub and network are
operating, and that the correct device drivers are
loaded.
b. There might be a defective Ethernet connector or
cable, or a problem with the hub.
3. Make sure that you are using the correct device
drivers that come with the server.
4. Check for operating system-specific causes for the
problem.
5. Test the Ethernet controller or adapter.
Netfinity 5500 M20 - Type 8662
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