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Appendix A - Technical Reference
Campus-REX2 RS Interface Card User Manual 141
ETHERNET PORT
The following table lists the 10/100Base-T interface data signals for both
MDI and MDI-X port selection. By selecting the correct position, you can
always use a straight-through cable.
STANDARDS
MDI Pin
(*)
(*) A 10/100Base-T port on a PC is always configured as an
MDI port.
MDI-X Pin Signal Description
1 3 TD+ Transmit Data (+)
2 6 TD- Transmit Data (-)
3 1 RD+ Receive Data (+)
4 4
5 5
6 2 RD- Receive Data (-)
7 7
8 8
ISO/IEC/IEEE
Document Number Description
ISO/IEC 8802-3: 1993 (E)
ANSI/IEEE Std 802.3, 1993
Edition
Information technology - Local and metropolitan area
networks – Part3: Carrier sense multiple access with
collision detection (CSMA/CD) access method and physical
layer specifications
ISO/IEC 10038: 1993 (E)
ANSI/IEEE Std 802.1D, 1993
Edition
Information technology – Telecommunications and
information exchange between systems – Local area
networks – Media access control (MAC) bridges
Digital, Intel, and Xerox Blue
Book, 1982
The Ethernet – A Local Area Network, data-link layer and
physical layer specifications, Version 2.0