IBM 6862 - PC 300 PL, User Manual

Page: 175 / 208

Appendix B. Additional Ethernet information
This appendix contains connector and cable specifications, diagnostic LED
indications, and Ethernet error messages for the Ethernet controller that is included
with some models.
Connector and Cable Specifications
The system board contains an Ethernet controller. The controller has an external
RJ-45 connector on the rear of the computer that is used with a Category 3 or
Category 5 twisted-pair cable. Through this connector, you can attach an Ethernet
network cable to the internal transceiver in your computer.
Attention:
The 10BASE-T Ethernet and the 100BASE-TX Fast Ethernet cabling in the network
must be Category 5 or higher to meet various standards, including electromagnetic
compatibility.
10BASE-T or 100 BASE-TX
UTP Cable
RJ-45 Modular Plug Connector
1
2
3
Pins
6
The following figure illustrates the wiring in straight-through cables.
Twisted
Pair
1
2
3
6
4, 5, 7, 8
RJ-45 Modular Connector
Pin
1
1
2
2
3, 4
10BASE-T / 100 BASE-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

Copyright IBM Corp. 1999
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